JP2025008394A - Compression molding apparatus and compression molding method - Google Patents

Abstract

To provide a compression molding device and a compression molding method which can prevent occurrence of molding failures and enable formation of a molded article having a thin resin component, and to facilitate handling of a sealing resin before resin folding and prevent occurrence of crack damages of the sealing resin at the time of handling.SOLUTION: A compression molding device 1 seals workpiece W with a sealing resin R using a sealing mold 202 having an upper mold 204 and a lower mold 206 and works the workpiece W into a molded article Wp, wherein a base resin Rm in a state in which a carrier C is fixed thereto is used as the sealing resin R.SELECTED DRAWING: Figure 11

Description

The present invention relates to a compression molding device and a compression molding method.

One example of a resin sealing device and resin sealing method that seals a workpiece having electronic components with sealing resin and processes it into a molded product is one that uses a compression molding method.

The compression molding method is a technique in which a predetermined amount of sealing resin is supplied to a sealing area (cavity) provided in a sealing mold comprising an upper mold and a lower mold, a workpiece is placed in the sealing area, and the upper and lower molds are clamped together to seal the workpiece with resin. As an example, when a sealing mold having a cavity in the upper mold is used, a technique is known in which the sealing resin is supplied all at once to the center position of the workpiece and molded. On the other hand, when a sealing mold having a cavity in the lower mold is used, a technique is known in which a release film (hereinafter sometimes simply referred to as "film") that covers the mold surface including the cavity and the sealing resin are supplied and molded (Patent Document 1: JP 2019-145550 A).

JP 2019-145550 A

Conventionally, the compression molding method in which the workpiece is held in the upper die, a cavity is provided in the lower die, and the lower die cavity is movable and sealing resin (granular resin, for example) is supplied into the cavity, has been widely adopted for strip boards, as it was thought to have advantages in terms of preventing deformation of the workpiece due to the flow of sealing resin and contact with wires.

However, in a configuration in which the workpiece is held in the upper die and the cavity is provided in the lower die, there is an issue that if the workpiece is thin or large, it is difficult to hold it in the upper die and it is prone to falling. Furthermore, when granular resin is used as the sealing resin, there are issues such as dust generation during molding due to friction between the resin particles, and handling is difficult, as well as issues that it is difficult to supply (spray) the sealing resin evenly over the entire area inside the cavity provided in the lower die, which tends to result in uneven spreading. There is also an issue that the air contained in the gaps between the particles when the sealing resin is sprayed and the gas components caused by degassing from the sealing resin when melted do not escape and remain in the molded product as voids, which is likely to cause molding defects.

On the other hand, when using a solid resin with a fixed shape, rather than a granular or liquid resin, as the sealing resin, regardless of the cavity arrangement, the following problem has become clear. Specifically, when attempting to form a molded product thin enough that the resin thickness after resin sealing (specifically, the thickness of the resin portion above or below the workpiece after resin sealing) is 0.4 mm or less, the thickness of the sealing resin (solid resin) before resin sealing must also be made thin. However, the sealing resin (solid resin) before resin sealing is naturally in a state before it has fully hardened, so it has low rigidity (brittleness) and low strength, and this has revealed the problem that it is extremely susceptible to breakage during handling (particularly during transportation).

The present invention was made in consideration of the above circumstances, and aims to provide a compression molding device and compression molding method that can prevent molding defects caused by uneven spreading of the sealing resin, residual gas, and dust generation during molding, and can form molded products with thin resin parts, as well as to facilitate handling of the sealing resin before resin sealing and prevent breakage during handling.

The present invention solves the above problems by the solution described below as one embodiment.

The compression molding device according to one embodiment is a compression molding device that uses a sealing die having an upper die and a lower die to seal a workpiece with sealing resin and process it into a molded product, and the sealing resin must be a base resin with a carrier fixed thereto.

According to the above embodiment, it is possible to prevent molding defects caused by uneven spreading of the sealing resin, residual gas, and dust generation during molding. In addition, it is possible to facilitate handling of the sealing resin, and it is possible to prevent the sealing resin from breaking during handling, especially when forming a thin molded product with a resin part having a thickness of 0.4 mm or less. In addition, by applying this to a configuration in which a cavity is provided in the upper mold and the workpiece is held in the lower mold, it is possible to solve problems such as the workpiece falling.

The sealing resin is preferably a solid resin formed by tableting a powder resin and fixing the carrier to the predetermined shape. In addition, the predetermined shape is preferably a shape in which the carrier is arranged in the center in a plan view, and the base resin is arranged on the periphery so as to cover the outer periphery of the carrier.

It is also preferable to provide a transport device that transports the workpiece between two of the sealing resins arranged so that each of the carriers is on the outside and transports the workpiece into the sealing mold.

In addition, the compression molding method according to one embodiment is a compression molding method in which a workpiece is sealed with sealing resin using a sealing die having an upper die and a lower die, and processed into a molded product, and includes a resin preparation process in which a base resin with a carrier fixed thereto is prepared as the sealing resin, a transport process in which the sealing resin is transported into the sealing die, and a resin sealing process in which the sealing die is closed to seal the workpiece with the sealing resin and process the molded product.

The resin sealing process preferably includes a step of setting the workpiece in the sealing mold while sandwiching it between two pieces of sealing resin arranged so that each of the carriers is on the outside.

The transport step preferably includes a step of transporting the workpiece sandwiched between two of the sealing resins arranged so that each of the carriers is on the outside into the sealing mold.

The present invention makes it possible to prevent molding defects caused by uneven spreading of the sealing resin, residual gas, and dust generation during molding, and also realizes a compression molding device and compression molding method that can form a molded product with a thin resin portion. In addition, it is possible to facilitate handling of the sealing resin before resin sealing, and to prevent breakage during handling.

FIG. 1 is a plan view showing an example of a compression molding device according to an embodiment of the present invention. FIG. 2 is a side view showing an example of a first press device of the compression molding apparatus according to the first embodiment of the present invention. 1 is a front cross-sectional view showing an example of a first mold of a compression molding apparatus according to a first embodiment of the present invention. FIG. 4 is a front cross-sectional view showing another example of the first mold of the compression molding apparatus according to the first embodiment of the present invention. FIG. FIG. 2 is a side view showing an example of a second press device of the compression molding apparatus according to the first embodiment of the present invention. 3 is a front cross-sectional view showing an example of a second mold of the compression molding apparatus according to the first embodiment of the present invention. FIG. 1 is an explanatory diagram of a compression molding method according to a first embodiment of the present invention. FIG. FIG. 8 is an explanatory diagram following FIG. 7 . Fig. 9A is a plan view showing an example of a sealing resin used in the compression molding apparatus and compression molding method according to the embodiment of the present invention, and Fig. 9B is a cross-sectional view taken along line AA in Fig. 9A. FIG. 9 is an explanatory diagram following FIG. 8 . FIG. 11 is an explanatory diagram continuing from FIG. FIG. 12 is an explanatory diagram following FIG. FIG. 13 is an explanatory diagram following FIG. 12. 14A to 14C are front cross-sectional views showing an example of a molded product formed by the compression molding apparatus and compression molding method according to an embodiment of the present invention, where FIG. 14A shows the state before the carrier peeling process, FIG. 14B shows the state after the carrier peeling process, and FIG. 14C shows the state after the cutting process. FIG. 11 is a side view showing an example of a third press device of the compression molding apparatus according to the second embodiment of the present invention. FIG. 11 is a side view showing an example of a third mold of the compression molding apparatus according to the second embodiment of the present invention. FIG. 4 is an explanatory diagram of a compression molding method according to a second embodiment of the present invention. FIG. 18 is an explanatory diagram following FIG. 17. FIG. 19 is an explanatory diagram following FIG. 18 .

[First embodiment]
(Overall composition)
Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a plan view (schematic view) showing an example of a compression molding apparatus 1 according to this embodiment (a configuration diagram common to the second embodiment). For convenience of explanation, arrows in the drawing indicate the left-right direction (X direction), the front-back direction (Y direction), and the up-down direction (Z direction) in the compression molding apparatus 1. In addition, in all the drawings for explaining each embodiment, members having the same function are given the same reference numerals, and repeated explanations thereof may be omitted.

The compression molding device 1 according to this embodiment is equipped with a sealing mold and is a device that performs resin sealing (compression molding) of a workpiece (molded product) W using sealing resin R.

First, the workpiece W to be molded is configured with electronic components. Examples of electronic components include coil sheets, semiconductor chips, MEMS chips, passive elements, heat sinks, conductive members, spacers, etc. The workpiece W may be configured to be composed of only electronic components, or may be configured to be mounted on a substrate (wire bonding mounting, flip chip mounting, etc.). Examples of substrates include rectangular or circular plate-shaped members such as resin substrates, ceramic substrates, metal substrates, carrier plates, lead frames, and wafers. The number of electronic components that make up the workpiece W is not particularly limited, and is set to one or more.

In this embodiment, the base resin Rm to which the carrier C is fixed is used as the sealing resin R (details will be described later). As an example, the carrier C is a plate-like member formed from a metal material (e.g., copper, copper alloy, etc.) with a thickness of approximately 0.1 mm to 0.5 mm, but is not limited to this.

In this embodiment, a thermosetting resin (such as, but not limited to, an epoxy resin containing a filler) is used as the base resin Rm and the sealing resin R. In addition, a powder resin (powdered resin) that is a thermosetting resin (property) is preferably used as the base resin Rm (details will be described later). However, this is not limited to this, and a configuration may be used in which a granular resin, a crushed resin, a solid resin, a liquid resin, or a resin that is a combination of two or more of these resins is used.

Examples of film F that can be suitably used include film materials with excellent heat resistance, ease of peeling, flexibility, and extensibility, such as PTFE (polytetrafluoroethylene), ETFE (polytetrafluoroethylene polymer), PET, FEP, fluorine-impregnated glass cloth, polypropylene, and polyvinylidine chloride. Film F is also used when forming sealing resin R in resin forming section 50, which will be described later.

Next, an overview of the compression molding apparatus 1 according to this embodiment will be described. As shown in FIG. 1, the compression molding apparatus 1 includes a base resin supply unit 10D that supplies the base resin Rm and the carrier C, a resin forming unit 10E that forms the sealing resin R using the base resin Rm and the carrier C, a supply unit 10A that supplies the workpiece W, a press unit 10B that seals the workpiece W with resin and processes it into a molded product Wp, and a storage unit 10C that stores the molded product Wp. As an example, the base resin supply unit 10D, the resin forming unit 10E, the supply unit 10A, the press unit 10B, and the storage unit 10C are arranged in this order along the X direction in FIG. 1. However, the above configuration is not limited to this, and the equipment configuration within the unit, the number of units, the order of arrangement of the units, etc. may be changed. For example, the supply unit 10A and the storage unit 10C may be arranged in the opposite direction to each other in the X direction, or may be arranged to be concentrated in one position (not shown). The configuration may also include units other than those listed above (not shown).

In addition, the compression molding device 1 has a guide rail 20 that is linearly provided between each unit, and a transport device (first loader) 22 that transports the work W and the sealing resin R (may be used for transporting items other than the work W and the sealing resin R), and a transport device (second loader) 24 that transports the molded product Wp (may be used for transporting items other than the molded product Wp) are provided so as to be movable between predetermined units along the guide rail 20. However, the configuration is not limited to the above, and a configuration may be provided with a common (single) transport device (loader) that transports the work W, the sealing resin R, the molded product Wp, etc. (not shown). In addition, the transport device may be configured to include a robot hand or the like instead of a loader.

In addition, in the compression molding device 1, a control unit 90 that controls the operation of each mechanism in each unit is disposed in the supply unit 10A (it may also be configured to be disposed in another unit).

(Base resin supply unit)
Next, the base resin supplying unit 10D provided in the compression molding apparatus 1 will be described.

The base resin supply unit 10D includes a carrier supply section 30 that supplies carriers C, and a base resin supply section 40 that supplies base resin Rm. As an example, the carrier supply section 30 is configured with a storage section (e.g., a stocker, etc.) in which multiple carriers C are stored (a pickup, stage, etc. may be provided as appropriate). The base resin supply section 40 is configured with a dispenser that supplies base resin Rm, a conveying device, etc. When the carriers C and base resin Rm are conveyed from the base resin supply unit 10D to the resin forming unit 10E, the first loader 22 may be used as the conveying device, or another conveying device (not shown) may be used (direct spraying from a dispenser, etc. may also be used for the base resin Rm).

(Resin Forming Unit)
Next, the resin forming unit 10E included in the compression molding apparatus 1 will be described.

The resin forming unit 10E includes a resin forming section 50 as a device that forms the sealing resin R using the base resin Rm and the carrier C. In this embodiment, two resin forming units 10E (three or more or one) are provided, and one resin forming section 50 (two or more) is provided per resin forming unit 10E (see FIG. 1). However, this configuration is not limited to this.

The resin forming section 50 is provided with a tableting die (first die) 102 having a pair of dies (for example, a plurality of die blocks, die plates, die pillars, etc., made of alloy tool steel, and other components assembled thereto) that are opened and closed. It is also provided with a press device (first press device) 150 that drives the first die 102 to open and close. As an example, the configuration is provided with two first press devices 150, but it may also be provided with one device, or with multiple devices (three or more) (not shown). A side view (schematic diagram) of the first press device 150 is shown in FIG. 2, and a front cross-sectional view (schematic diagram) of the first die 102 is shown in FIG. 3.

Here, as shown in FIG. 2, the first press device 150 is configured to include a pair of platens 154, 156, a plurality of tie bars 152 on which the pair of platens 154, 156 are supported, and a drive device for moving (raising and lowering) the platen 156. Specifically, the drive device is configured to include a drive source (e.g., an electric motor) 160 and a drive transmission mechanism (e.g., a ball screw or a toggle link mechanism) 162 (however, this is not limited to this). In this embodiment, the upper platen 154 in the vertical direction is set as a fixed platen (a platen fixed to the tie bars 152), and the lower platen 156 is set as a movable platen (a platen slidably held by the tie bars 152 and raised and lowered). However, this is not limited to this, and the platens may be set upside down, i.e., the upper side may be set as a movable platen and the lower side as a fixed platen, or both the upper and lower sides may be set as movable platens (neither is shown).

On the other hand, as shown in FIG. 3, the first mold 102 is provided with a first upper mold 104 on the vertical side and a first lower mold 106 on the vertical side as a pair of molds arranged between the pair of platens 154, 156 in the first press device 150. The first upper mold 104 is assembled to the upper platen (in this embodiment, the fixed platen 154), and the first lower mold 106 is assembled to the lower platen (in this embodiment, the movable platen 156). The first upper mold 104 and the first lower mold 106 approach and move away from each other to close and open the mold (the vertical direction (up and down direction) is the mold opening and closing direction). In the first mold 102 according to this embodiment, the first upper mold 104 constitutes a so-called "pestle mold", and the first lower mold 106 constitutes a so-called "mortar mold".

Next, the first lower die 106 of the first mold 102 will be described in detail. As shown in FIG. 3, the first lower die 106 includes a lower die chase (first lower die chase) 110, a cavity piece (first cavity piece) 126 held therein, a clamper (first clamper) 128, and the like. The first lower die chase 110 is fixed to the upper surface of a support plate (first support plate) 114 via a support pillar (first support pillar) 112. A cavity (first cavity) 108 is provided on the upper surface (surface on the first upper die 104 side) of the first lower die 106. A carrier C and a predetermined amount of base resin Rm are accommodated in this first cavity 108.

The first clamper 128 is configured in an annular shape to surround the first cavity piece 126, and is assembled to be movable up and down while being spaced apart (floating) from the upper surface of the first support plate 114 via a push pin (first push pin) 122 and a clamper spring (first clamper spring) 124 (for example, a biasing member exemplified by a coil spring) (however, this assembly structure is not limited). The first cavity piece 126 constitutes the inner part (bottom part) of the first cavity 108, and the first clamper 128 constitutes the side part of the first cavity 108. As an example, the upper surface (surface facing the first upper mold 104) of the first cavity piece 126 is formed in a flat shape. The shape and number of first cavities 108 provided in one first lower mold 106 are set appropriately (one or multiple).

Here, the first press device 150 is provided with a lower die film supply section (first lower die film supply section) 111 that supplies film F to cover the die surface 106a (predetermined area) including the inner surface of the first cavity 108 in the first lower die 106. As an example, the film F is in a roll shape, but it may also be in a strip shape.

The first lower mold 106 is also provided with suction paths (holes, grooves, etc.) (not shown) that communicate with a suction device at the boundaries between the first clamper 128 and the first cavity piece 126. This allows the film F supplied from the first lower mold film supply unit 111 to be adsorbed and held on the mold surface 106a, including the inner surface of the first cavity 108.

In this embodiment, a first lower die heating mechanism (not shown) is provided that heats the first lower die 106 to a predetermined temperature. This first lower die heating mechanism includes a heater (e.g., an electric wire heater), a temperature sensor, a power source, etc., and heating is controlled by the control unit 90. As an example, the heater is built into the first lower die chase 110 and is configured to apply heat to the entire first lower die 106 and the carrier C and base resin Rm contained in the first cavity 108. At this time, the first lower die 106 is heated to a predetermined temperature (e.g., 50°C to 80°C) at which the thermal curing (main curing) of the base resin Rm is unlikely to proceed.

Next, the first upper die 104 of the first mold 102 will be described in detail. As shown in FIG. 3, the first upper die 104 has a tableting plate (first plate) 142 held (fixed) by an upper die chase (first upper die chase) 140. This tableting plate (first plate) 142 presses the carrier C and a predetermined amount of base resin Rm contained in the first cavity 108 of the first lower die 106 to form (tablet) the sealing resin R having a predetermined shape to which the carrier C is fixed (the formation method will be described in detail later). As an example, the lower surface of the first plate 142 (the surface facing the first lower die 106) is formed flat.

Here, the first press device 150 is provided with an upper die film supply section (first upper die film supply section) 113 that supplies a film F to cover the die surface 104a (predetermined area) of the first upper die 104. As an example, the film F is in a roll shape, but it may also be in a strip shape.

The first upper mold 104 also has suction paths (holes, grooves, etc.) (not shown) in the first plate 142, etc., that communicate with a suction device. This allows the film F supplied from the first upper mold film supply unit 113 to be adsorbed and held on the mold surface 104a.

In this embodiment, a first upper die heating mechanism (not shown) is provided to heat the first upper die 104 to a predetermined temperature. This first upper die heating mechanism includes a heater (e.g., an electric wire heater), a temperature sensor, a power source, etc., and heating is controlled by the control unit 90. As an example, the heater is built into the first upper die chase 140 and is configured to apply heat to the entire first upper die 104. At this time, the first upper die 104 is heated to a predetermined temperature (e.g., 50°C to 80°C) at which the thermal curing (main curing) of the base resin Rm held (contained) in the first lower die 106 does not proceed easily.

The first mold 102 described above has a structure that includes a movable clamper (first clamper 128) as an example, but as another example, it may have a structure that does not include a movable clamper as shown in Figure 4.

(Supply unit)
Next, the supply unit 10A included in the compression molding apparatus 1 will be described.

The supply unit 10A is equipped with a supply magazine 12 in which multiple workpieces W are stored. Here, the supply magazine 12 may be a known stack magazine, slit magazine, or the like.

The supply unit 10A may be configured to include a work stage (not shown) on which the work W removed from the supply magazine 12 is placed. The supply unit 10A may also be configured to include a resin stage (not shown) on which the sealing resin R is placed.

The workpiece W and sealing resin R are held by a transport device (for example, the first loader 22) and transported to the press unit 10B, where they are set in a predetermined position in the second mold 202 (details of the process will be described later). Note that the holding mechanism for the workpiece W and sealing resin R in the first loader 22 uses a known holding mechanism (for example, a clamping configuration with holding claws, a suction hole connected to a suction device for suction, etc.) (not shown).

As a variation of the above-mentioned conveying device, instead of the first loader 22 that moves in the X and Y directions, a separate conveying device (loader) that moves in the X direction to convey between units and a separate conveying device (loader) that moves in the Y direction to load and set into the second mold 202 may be provided (not shown).

The supply unit 10A also includes a preheater (not shown) that preheats the workpiece W and the sealing resin R. As an example, a known heating mechanism (e.g., an electric wire heater, an infrared heater, etc.) is used for the preheater. This allows the workpiece W and the sealing resin R to be preheated before being carried into the second mold 202. Note that a configuration without a preheater is also possible. Also, instead of or in addition to the preheater, the first loader 22 may be configured to include a heater (not shown) for preheating.

(Press unit)
Next, the press unit 10B included in the compression molding apparatus 1 will be described.

The press unit 10B is equipped with a resin sealing section 70 that seals the workpiece W with resin and processes it into a molded product Wp. In this embodiment, there are two press units 10B (three or more, or just one) equipped with the resin sealing section 70, and one press unit 10B is equipped with one resin sealing section 70 (two or more) (see FIG. 1). However, this configuration is not limited to this.

The resin sealing section 70 includes a sealing die (second die) 202 having a pair of dies (for example, a pair of dies made of alloy tool steel, die plates, die pillars, and other components assembled thereto) that are opened and closed. It also includes a press device (second press device) 250 that drives the second die 202 to open and close. As an example, the second press device 250 is configured to include two units, but it may also be configured to include one unit or multiple units (three or more units) (not shown). A side view (schematic diagram) of the second press device 250 is shown in FIG. 5, and a front cross-sectional view (schematic diagram) of the second die 202 is shown in FIG. 6.

Here, as shown in FIG. 5, the second press device 250 is configured to include a pair of platens 254, 256, a plurality of tie bars 252 on which the pair of platens 254, 256 are supported, and a drive device for moving (raising and lowering) the platen 256. Specifically, the drive device is configured to include a drive source (e.g., an electric motor) 260 and a drive transmission mechanism (e.g., a ball screw or a toggle link mechanism) 262 (however, this is not limited to this). In this embodiment, the upper platen 254 in the vertical direction is set as a fixed platen (a platen fixed to the tie bars 252), and the lower platen 256 is set as a movable platen (a platen slidably held by the tie bars 252 and raised and lowered). However, this is not limited to this, and the platens may be set upside down, i.e., the upper side may be set as a movable platen and the lower side as a fixed platen, or both the upper and lower sides may be set as movable platens (neither is shown).

On the other hand, as shown in FIG. 6, the second mold 202 is a pair of molds arranged between the pair of platens 254, 256 in the second press device 250, and includes one mold (second upper mold 204) on the upper side in the vertical direction and the other mold (second lower mold 206) on the lower side. That is, the second upper mold 204 is assembled to the upper platen (in this embodiment, the fixed platen 254), and the second lower mold 206 is assembled to the lower platen (in this embodiment, the movable platen 256). The second upper mold 204 and the second lower mold 206 approach and move away from each other to close and open the mold (the vertical direction (up and down direction) is the mold opening and closing direction).

Next, the second upper die 204 of the second mold 202 will be described in detail. As shown in FIG. 6, the second upper die 204 includes an upper die chase (second upper die chase) 210, a cavity piece (second cavity piece) 226 held therein, a clamper (second clamper) 228, and the like. The second upper die chase 210 is fixed to the lower surface of a support plate (second support plate) 214 via a support pillar (second support pillar) 212. A cavity (second cavity) 208 is provided on the lower surface (surface on the second lower die 206 side) of the second upper die 204.

The second clamper 228 is configured in an annular shape to surround the second cavity piece 226, and is assembled to be movable up and down while being spaced apart (floating) from the underside of the second support plate 214 via a push pin (second push pin) 222 and a clamper spring (second clamper spring) 224 (e.g., a biasing member such as a coil spring) (however, this assembly structure is not limited). The second cavity piece 226 forms the inner part (bottom part) of the second cavity 208, and the second clamper 228 forms the side part of the second cavity 208. The shape and number of the second cavities 208 provided in one second upper mold 204 are appropriately set according to the shape and number of the workpieces W, etc. (one or multiple).

Here, the second press device 250 is provided with a film supply section (second upper die film supply section) 213 that supplies film F to cover the die surface 204a (predetermined area) including the inner surface of the second cavity 208 in the second upper die 204. As an example, the film F is in a roll shape, but it may also be in a strip shape.

The second upper mold 204 is also provided with suction paths (holes, grooves, etc.) (not shown) that communicate with a suction device on the underside of the second clamper 228, the boundary between the second clamper 228 and the second cavity piece 226, etc. This allows the film F supplied from the second upper mold film supply section 213 to be adsorbed and held on the mold surface 204a including the inner surface of the second cavity 208.

In addition, in this embodiment, a second upper die heating mechanism (not shown) is provided that heats the second upper die 204 to a predetermined temperature. This second upper die heating mechanism includes a heater (e.g., an electric wire heater), a temperature sensor, a power source, etc., and heating is controlled by the control unit 90. As an example, the heater is built into the second upper die chase 210, and heats the second upper die 204 to a predetermined temperature (e.g., 100°C to 300°C).

Next, the second lower die 206 of the second mold 202 will be described in detail. As shown in FIG. 6, the second lower die 206 includes a lower die chase (second lower die chase) 240 and a lower plate (second plate) 242 held therein.

The second lower mold 206 is also provided with a workpiece holding section 205 that holds (including placing) the sealing resin R and the workpiece W at a predetermined position on the upper surface of the second plate 242. In this embodiment, the workpiece W is held by the workpiece holding section 205 in a state where it is sandwiched between two sealing resins R arranged so that each carrier C is on the outside (not facing each other). Note that the holding mechanism can be a publicly known suction device, chuck jaws, etc.

Here, the second press device 250 is provided with a film supply section (second lower die film supply section) 211 that supplies film F to cover the die surface 206a (predetermined area) of the second lower die 206. As an example, the film F is in a roll shape, but it may also be in a strip shape.

The second lower mold 206 also has a suction passage (hole, groove, etc.) (not shown) in the lower plate (second plate) 242 etc. that communicates with a suction device. This allows the film F supplied from the second lower mold film supply unit 211 to be adsorbed and held on the mold surface 206a.

In addition, in this embodiment, a second lower die heating mechanism (not shown) is provided that heats the second lower die 206 to a predetermined temperature. This second lower die heating mechanism includes a heater (e.g., an electric wire heater), a temperature sensor, a power source, etc., and heating is controlled by the control unit 90. As an example, the heater is built into the second lower die chase 240, and heats the second lower die 206 to a predetermined temperature (e.g., 100°C to 300°C).

(Storage unit)
Next, the storage unit 10C included in the compression molding apparatus 1 will be described.

The molded product Wp is held by a transport device (for example, the second loader 24) and removed from the second mold 202, and transported to the storage unit 10C. The holding mechanism for the molded product Wp in the second loader 24 uses a known holding mechanism (for example, a clamping mechanism with holding claws, a suction hole that communicates with a suction device and a suction mechanism, etc.) (not shown).

As a variation of the above-mentioned conveying device, instead of the second loader 24 that moves in the X and Y directions, a separate conveying device (loader) that moves in the X direction to convey between units and a separate conveying device (loader) that moves in the Y direction to unload from the second mold 202 may be provided (not shown).

The storage unit 10C may also be configured to include a molded product stage (not shown) on which the molded product Wp transported from the press unit 10B is placed.

Next, as an example, the storage unit 10C is equipped with a carrier peeling device 16 that peels off the carrier C from the molded product Wp. If necessary, the storage unit 10C may be configured to include an inversion mechanism that inverts the molded product Wp so that the top and bottom surfaces are reversed (not shown). The carrier peeling device 16 may be a mechanism that adsorbs and peels off the carrier C.

The storage unit 10C also includes, as an example, a cutting device 18 that cuts a predetermined position of the molded product Wp. Specifically, the cutting device 18 cuts the area of the molded product Wp from which the carrier C has been peeled off in the thickness direction, and cuts off the outer edge. The cutting device 18 can be a known mechanical cutter or a thermal melting cutter.

The storage unit 10C also includes a storage magazine 14 that stores the molded product Wp after the carrier C has been peeled off and the specified positions have been cut. A known stack magazine or the like can be used as the storage magazine 14. It is also possible to use a configuration that stores molded products Wp in a state where they have not been peeled off or cut.

The carrier C peeled off from the molded product Wp is held by a transport device (for example, the second loader 24) and transported from the storage unit 10C to the resin forming unit 10E (or the base resin supply unit 10D). Note that the configuration may also be such that the carrier C is transported by a transport device (not shown) other than the second loader 24. With this configuration, the peeled off carrier C can be reused when forming the sealing resin R.

(Compression molding method)
Next, there will be described steps of the compression molding method according to the present embodiment, which is carried out using the compression molding apparatus 1. Here, Fig. 7 to Fig. 13 are explanatory views of each step, and are illustrated as front cross-sectional views taken in the same direction as Figs. 3 and 6.

First, the first preparation step is carried out. The first preparation step includes the following steps. A heating step (first lower mold heating step) is carried out in which the first lower mold 106 is adjusted to a predetermined temperature (a temperature at which the base resin Rm and the sealing resin R do not fully cure, for example, 50°C to 80°C) and heated by the first lower mold heating mechanism. In addition, a heating step (first upper mold heating step) is carried out in which the first upper mold 104 is adjusted to a predetermined temperature (a temperature at which the base resin Rm and the sealing resin R do not fully cure, for example, 50°C to 80°C) and heated by the first upper mold heating mechanism. In addition, a lower mold film supply step (first lower mold film supply step) is carried out in which the first lower mold film supply unit 111 is operated to supply a new film F and adsorb it to cover a predetermined area of the mold surface 106a including the inner surface of the first cavity 108 in the first lower mold 106. In addition, the first upper die film supply unit 113 is operated to supply new film F, and an upper die film supply process (first upper die film supply process) is carried out in which the film F is adsorbed to cover a predetermined area of the die surface 104a of the first upper die 104.

Before, after, or in parallel with the first preparation step described above, a resin preparation step is carried out to prepare a base resin Rm with a carrier C fixed thereto as the sealing resin R.

As an example of a resin preparation process, carrier C is supplied in carrier supply section 30. A predetermined amount of base resin Rm is supplied in base resin supply section 40 by a dispenser (not shown) or the like. Next, a tableting process is carried out in resin formation section 50, in which carrier C and base resin Rm are tableted to form a solid sealing resin R formed in a predetermined shape with carrier C fixed thereto. Note that "solid" includes a state in which the resin has melted to the so-called B stage or is in a state immediately before melting, since the resin is tableted while being heated to a temperature at which it will not fully harden.

Specifically, the above-mentioned tableting process involves transporting the carrier C supplied from the carrier supply unit 30 by a transport device (e.g., the first loader 22, etc.) and storing it in a predetermined position (e.g., the center position) in the first cavity 108 of the first lower die 106. Next, a predetermined amount of base resin Rm supplied from the base resin supply unit 40 is transported by a transport device (e.g., the first loader 22, etc.) or directly sprayed from a dispenser or the like and stored in the first cavity 108 of the first lower die 106. As an example, in the first cavity 108, the base resin Rm is placed on the carrier C previously stored (see FIG. 7). Next, the first press device 150 is operated to close the first die 102 heated to the above-mentioned predetermined temperature (see FIG. 8). At this time, the first cavity piece 126 rises relatively within the first cavity 108, and the carrier C and base resin Rm are compressed (sandwiched and pressurized) between the first cavity piece 126 and the first plate 142. This forms a solid sealing resin R that has a predetermined shape with the carrier C fixed thereto and is not thermally cured (mainly cured).

As an example, the above-mentioned "predetermined shape" is a shape in which, in plan view, the carrier C is placed in the center and the base resin Rm (in a solid state after tableting) is placed on the periphery so as to cover the outer periphery Ca of the carrier C, as shown in FIG. 9A (plan view with the exposed surface of the carrier C facing up) and FIG. 9B (cross-sectional view along line A-A in FIG. 9A). Note that in order to sandwich the workpiece W described below from above and below, a positioning step for the workpiece W may be provided on the resin surface. This can increase the adhesion between the carrier C and the base resin Rm, thereby preventing unintended peeling from each other.

It is important that the above-mentioned tableting process is carried out at a temperature at which the thermal curing (main curing) of the base resin Rm does not proceed easily (the first lower die 106 and the first upper die 104 are heated to a temperature at which the thermal curing (main curing) does not proceed easily) so that the formed sealing resin R can be thermally cured (mainly cured) in the subsequent resin sealing process. As described above, the "temperature at which the thermal curing does not proceed easily" depends on the material of the base resin Rm, but as a specific example, it is about 50°C to 80°C (about 70°C in this embodiment).

It is also preferable to use a powder resin as the base resin Rm. This allows the amount of resin to be adjusted and supplied with extremely high precision compared to when granular or crushed resin is used. However, it is not limited to powder resin.

As another example of the resin preparation process, sealing resin R having the same configuration as described above may be formed in advance outside the device and then stored in a stocker or the like, or supplied to the device (compression molding device 1) by a conveying device (not shown).

After the tableting process, the first mold 102 is opened, and the used film F is separated from the sealing resin R (with the carrier C fixed to the lower surface side) to enable the sealing resin R to be removed (first mold opening process) (see FIG. 10). In this embodiment, by providing the lower mold film supply process and upper mold film supply process described above, the film F is placed on both the mold surface 106a of the first lower mold 106 and the mold surface 104a of the first upper mold 104, which makes it easier to release the sealing resin R formed by tableting and prevents damage caused by resin adhesion to the mold.

Furthermore, after or in parallel with the first mold opening process, the first lower mold film supply unit 111 and the first upper mold film supply unit 113 are operated to perform a film supply process (first lower mold film supply process, first upper mold film supply process) in which the used film F is sent out from within the first mold 102 and a new film F is sent into and set within the first mold 102.

In addition, a second preparation step is carried out before, after, or in parallel with the above-mentioned first preparation step. The second preparation step has the following steps. A heating step (second upper mold heating step) is carried out in which the second upper mold 204 is adjusted to a predetermined temperature (e.g., 100°C to 300°C) and heated by the second upper mold heating mechanism. In addition, a heating step (second lower mold heating step) is carried out in which the second lower mold 206 is adjusted to a predetermined temperature (e.g., 100°C to 300°C) and heated by the second lower mold heating mechanism. In addition, a lower mold film supply step (second lower mold film supply step) is carried out in which the second lower mold film supply unit 211 is operated to supply new film F and adsorb it so as to cover a predetermined area of the mold surface 106a of the second lower mold 206. In addition, the second upper die film supply unit 213 is operated to supply new film F, and an upper die film supply process (second upper die film supply process) is performed in which the film F is adsorbed to cover a predetermined area of the die surface 204a, including the inner surface of the second cavity 208 in the second upper die 204.

After the second preparation step, a setting step is performed in which the sealing resin R and the workpiece W are set in the sealing mold (second mold 202). As shown in FIG. 11, the workpiece W is sandwiched between two sealing resins R arranged so that each carrier C is on the outside, and is held (including placed) on the workpiece holding portion 205.

As an example of the above-mentioned setting process, the first sealing resin R prepared in the resin preparation process is transported by a transport device (e.g., the first loader 22, etc.) and placed on the workpiece holding section 205 with the surface on which the carrier C is exposed facing down. Next, the workpiece W supplied from the supply magazine 12 is transported by a transport device (e.g., the first loader 22, etc.) and placed on the first sealing resin R. Next, the second sealing resin R prepared in the resin preparation process is transported by a transport device (e.g., the first loader 22, etc.) and placed on the workpiece W with the surface on which the carrier C is exposed facing up.

Alternatively, as another example of the setting process, the first sealing resin R and the second sealing resin R prepared in the resin preparation process and the workpiece W supplied from the supply magazine 12 are stacked so that the workpiece W is sandwiched between the two (first and second) sealing resins R arranged so that the carriers C are on the outside (i.e., the first sealing resin R is prepared with the surface on which the carrier C is exposed on the lower side, the workpiece W is placed on the first sealing resin R, and the second sealing resin R is placed on the workpiece W with the surface on which the carrier C is exposed on the upper side). Next, the first sealing resin R, the workpiece W, and the second sealing resin R in the stacked state are transported by a transport device (e.g., the first loader 22, etc.) and placed on the workpiece holding portion 205. In this case, there is an advantage in that the workpiece W and the two sealing resins R are transported to the second mold 202 at one time, rather than separately. In addition, the first sealing resin R and the second sealing resin R can be supplied simultaneously to the heated sealing mold (second mold 202), which has the advantage that the thermal history does not change.

After all of the above steps have been performed, a resin sealing step is performed in which the workpiece W is sealed with sealing resin R (sandwiched between two sealing resins R in this embodiment) and processed into a molded product Wp. Specifically, the second mold 202 is closed, and the second cavity piece 226 is lowered relatively within the second cavity 208 to perform a mold closing step (second mold closing step) in which the sealing resin R is heated and pressurized against the workpiece W. This causes the sealing resin R to thermally harden, completing the resin sealing (compression molding) (see FIG. 12). This forms a molded product Wp having the shape shown in FIG. 14A.

After the second mold closing step, the second mold 202 is opened, and a mold opening step (second mold opening step) is performed in which the molded product Wp is separated from the used film F so that the molded product Wp can be removed (see FIG. 13). Next, a molded product removal step is performed in which the molded product Wp is removed from the second mold 202 by a conveying device (e.g., the second loader 24, etc.) and conveyed to the storage unit 10C.

After or in parallel with the molded product removal process, the second lower die film supply unit 211 and the second upper die film supply unit 213 are operated to carry out a film supply process (second lower die film supply process, second upper die film supply process) in which the used film F is sent out from within the second die 202 and a new film F is sent into and set within the second die 202.

After the molded product removal process, a carrier peeling process is carried out in which the carrier C is peeled off from the molded product Wp using a carrier peeling device 16. This results in the formation of a molded product Wp having the shape shown in FIG. 14B. Note that this process may involve inverting the molded product Wp midway and peeling off the upper and lower carriers C in sequence using one peeling mechanism, or the molded product Wp may not be inverted, and the upper and lower carriers C may be peeled off separately using two peeling mechanisms.

After the carrier peeling process, a process is carried out in which the carrier C peeled off from the molded product Wp is transported from the storage unit 10C to the resin formation unit 10E (or the base resin supply unit 10D) by a transport device (e.g., the second loader 24, etc.) (it is sufficient that the carrier C finally reaches the resin formation section 50).

According to the above configuration, the carrier C can be reused from the resin preparation process in which the carrier C is peeled off from the molded product Wp and the sealing resin R (i.e., the base resin Rm to which the carrier C is fixed) is prepared (formed). This makes it possible to reduce manufacturing costs by reducing the number of parts (total number of carriers C required). In addition, since there is no need to prepare many carriers C in advance, it is possible to miniaturize the device, particularly in terms of the size of the storage section for the carrier C (e.g., a stocker, etc.) and the installation space.

After the carrier peeling process, a cutting process is performed to cut the molded product Wp at a predetermined position (the position indicated by the dashed line in FIG. 14B). Specifically, a cutting device 18 is used to cut the molded product Wp in the thickness direction within the area where the carrier C has been peeled off, and the outer edge is removed. This makes it possible to form a molded product Wp (final target shape) having the shape shown in FIG. 14C, i.e., a thin resin thickness (resin thickness at the upper or lower part of the workpiece W).

After the cutting process, a storage process is carried out in which the molded product Wp (in this embodiment, the carrier C has been peeled off and the product has been cut at a predetermined position) is stored in the storage magazine 14. It is also possible to store the molded product Wp without carrying out the carrier peeling process or the cutting process (i.e., in a state where the product has not been peeled or cut).

The above are the main steps of the compression molding method performed using the compression molding device 1. However, the above order of steps is only an example, and the order of steps can be changed or steps can be performed in parallel as long as there are no problems.

As described above, when trying to form a molded product Wp with a resin thickness of 0.4 mm or less after resin sealing (specifically, the thickness Da of the resin part at the upper position of the workpiece W or the thickness Db of the resin part at the lower position as shown in FIG. 14C), the thickness of the sealing resin (solid resin) before resin sealing must also be thin. However, the sealing resin (solid resin) before resin sealing is naturally in a state before it is fully hardened, so it has low rigidity (brittle) and low strength, and therefore there is a problem that it is very likely to break during handling (especially during transportation). In particular, it has been confirmed that this is more pronounced in the case of sealing resin (solid resin) formed by tableting. In contrast, according to the compression molding device 1 and compression molding method using the sealing resin R of this embodiment, the problem can be solved, that is, the occurrence of breakage during handling (especially during transportation) of the sealing resin R can be prevented, and a molded product Wp with a thin resin part can be formed. Furthermore, the inventor's experiments have verified that it is possible to achieve a shape where Da = Db = 0.1 mm.

In addition, by using the sealing resin R of the above configuration, it is possible to solve or reduce the problems that were previously caused by granular resin, such as uneven distribution, residual gas, and dust generation during molding, as well as the difficulty of handling.

Second Embodiment
Next, a second embodiment of the present invention will be described. The compression molding apparatus 1 and the compression molding method according to this embodiment are basically the same as those of the first embodiment described above, but have differences in the configuration of the press unit 10B (particularly, the configuration of the press apparatus and the sealing mold) and the process performed mainly by the press unit 10B. Hereinafter, this embodiment will be described focusing on the differences.

The press unit 10B according to this embodiment is equipped with a sealing die (third die) 302 having a pair of dies (for example, a pair of dies made of alloy tool steel, die plates, die pillars, and other members assembled thereto) that are opened and closed. It is also equipped with a press device (third press device) 350 that drives the third die 302 to open and close. As an example, in FIG. 1 (shown as a common configuration with the second press device 250), two third press devices 350 are provided, but one or more (three or more) may be provided (not shown). A side view (schematic diagram) of the third press device 350 is shown in FIG. 15, and a front cross-sectional view (schematic diagram) of the third die 302 is shown in FIG. 16.

Here, as shown in FIG. 15, the third press device 350 is configured to include a pair of platens 354, 356, a plurality of tie bars 352 on which the pair of platens 354, 356 are supported, and a drive device for moving (raising and lowering) the platen 356. Specifically, the drive device is configured to include a drive source (e.g., an electric motor) 360 and a drive transmission mechanism (e.g., a ball screw or a toggle link mechanism) 362 (however, this is not limited to this). In this embodiment, the upper platen 354 in the vertical direction is set as a fixed platen (a platen fixed to the tie bars 352), and the lower platen 356 is set as a movable platen (a platen slidably held by the tie bars 352 and raised and lowered). However, this is not limited to this, and the platens may be set upside down, i.e., the upper side may be set as a movable platen and the lower side as a fixed platen, or both the upper and lower sides may be set as movable platens (neither is shown).

On the other hand, as shown in FIG. 16, the third mold 302 is a pair of molds arranged between the pair of platens 354, 356 in the third press device 350, and includes one mold (third upper mold 304) on the upper side in the vertical direction and the other mold (third lower mold 306) on the lower side. That is, the third upper mold 304 is assembled to the upper platen (in this embodiment, the fixed platen 354), and the third lower mold 306 is assembled to the lower platen (in this embodiment, the movable platen 356). The third upper mold 304 and the third lower mold 306 approach and move away from each other to close and open the mold (the vertical direction (up and down direction) is the mold opening and closing direction).

Next, the third lower die 306 of the third mold 302 will be described in detail. As shown in FIG. 16, the third lower die 306 includes a lower die chase (third lower die chase) 310, a cavity piece (third cavity piece) 326 held therein, and a clamper (third clamper) 328. The third lower die chase 310 is fixed to the upper surface of a support plate (third support plate) 314 via a support pillar (third support pillar) 312. A cavity (third cavity) 308 is provided on the upper surface of the third lower die 306 (the surface on the third upper die 304 side).

The third clamper 328 is configured in an annular shape to surround the third cavity piece 326, and is assembled to be movable up and down while being spaced apart (floating) from the upper surface of the third support plate 314 via a push pin (third push pin) 322 and a clamper spring (third clamper spring) 324 (e.g., a biasing member such as a coil spring) (however, this assembly structure is not limited). The third cavity piece 326 forms the inner part (bottom part) of the third cavity 308, and the third clamper 328 forms the side part of the third cavity 308. The shape and number of the third cavities 308 provided in one third lower mold 306 are appropriately set according to the shape and number of the workpieces W, etc. (one or multiple).

Here, the third press device 350 is provided with a film supply section (third lower die film supply section) 311 that supplies film F to cover the die surface 306a (predetermined area) including the inner surface of the third cavity 308 in the third lower die 306. As an example, the film F is in a roll shape, but it may also be in a strip shape.

The third lower mold 306 is also provided with suction paths (holes, grooves, etc.) (not shown) that communicate with a suction device on the top surface of the third clamper 328 and on the boundary between the third clamper 328 and the third cavity piece 326. This allows the film F supplied from the third lower mold film supply unit 311 to be adsorbed and held on the mold surface 306a, including the inner surface of the third cavity 308.

In addition, in this embodiment, a third lower die heating mechanism (not shown) is provided that heats the third lower die 306 to a predetermined temperature. This third lower die heating mechanism includes a heater (e.g., an electric wire heater), a temperature sensor, a power source, etc., and heating is controlled by the control unit 90. As an example, the heater is built into the third lower die chase 310, and heats the third lower die 306 to a predetermined temperature (e.g., 100°C to 300°C).

Next, the third upper die 304 of the third mold 302 will be described in detail. As shown in FIG. 16, the third upper die 304 includes an upper die chase (third upper die chase) 340 and an upper plate (third plate) 342 held thereby.

In this embodiment, a holding portion 305 is provided to hold the molded product Wp after resin sealing at a predetermined position on the lower surface of the third plate 342. As an example, the holding portion 305 is disposed through the third plate 342 and has a suction path (hole, groove, etc.) that communicates with a suction device (not shown). Specifically, one end of the suction path is connected to the mold surface 304a of the third upper mold 304, and the other end is connected to a suction device disposed outside the third upper mold 304. This makes it possible to drive the suction device to suck from the suction path and hold the molded product Wp after resin sealing by adsorbing it to the mold surface 304a (here, the lower surface of the third plate 342). Instead of the above-mentioned suction holding mechanism, or together with the suction holding mechanism, a configuration may be provided with a holding claw that holds the outer periphery of the molded product Wp (not shown). The shape and number of the holding portions 305 provided on one third upper mold 304 are appropriately set (one or multiple).

Here, the third press device 350 is provided with an upper die film supply section (third upper die film supply section) 313 that supplies film F to cover the die surface 304a (predetermined area) of the third upper die 304. As an example, the film F is in a roll shape, but it may also be in a strip shape.

The third upper mold 304 also has suction paths (holes, grooves, etc.) (not shown) in the third plate 342 etc. that communicate with a suction device. This allows the film F supplied from the third upper mold film supply unit 313 to be adsorbed and held on the mold surface 304a.

In addition, in this embodiment, a third upper die heating mechanism (not shown) is provided that heats the third upper die 304 to a predetermined temperature. This third upper die heating mechanism includes a heater (e.g., an electric wire heater), a temperature sensor, a power source, etc., and heating is controlled by the control unit 90. As an example, the heater is built into the third upper die chase 340, and heats the third upper die 304 to a predetermined temperature (e.g., 100°C to 300°C).

Next, the steps of the compression molding method according to this embodiment, which is carried out using the compression molding device 1 having the above configuration, will be described. Here, Figures 17 to 19 are explanatory diagrams of each step, and are illustrated as front cross-sectional views in the same direction as Figure 16.

First, the first preparation step is carried out. Specifically, this is the same as in the first embodiment.

Before, after, or in parallel with the first preparation step described above, a resin preparation step is carried out to prepare a base resin Rm to which a carrier C is fixed as the sealing resin R. The specific steps are the same as those in the first embodiment.

In addition, in this embodiment, instead of the second preparation step described above, a third preparation step is performed. The third preparation step includes the following steps. A heating step (third upper mold heating step) is performed in which the third upper mold 304 is adjusted to a predetermined temperature (e.g., 100°C to 300°C) and heated by the third upper mold heating mechanism. A heating step (third lower mold heating step) is also performed in which the third lower mold 306 is adjusted to a predetermined temperature (e.g., 100°C to 300°C) and heated by the third lower mold heating mechanism. A lower mold film supply step (third lower mold film supply step) is also performed in which the third lower mold film supply unit 311 is operated to supply new film F and adsorb it to cover a predetermined area of the mold surface 306a including the inner surface of the third cavity 308 in the third lower mold 306. In addition, the third upper die film supply unit 313 is operated to supply new film F, and an upper die film supply process (third upper die film supply process) is carried out in which the film F is adsorbed to cover a predetermined area of the die surface 304a of the third upper die 304.

After the third preparation step, a setting step is performed in which the sealing resin R and the workpiece W are set in the sealing mold (third mold 302). As shown in FIG. 17, the workpiece W is sandwiched between two sealing resins R arranged so that each carrier C is on the outside, and is held (including placed) in the third cavity 308 (on the third cavity piece 326).

As an example of the above-mentioned setting process, the first sealing resin R prepared in the resin preparation process is transported by a transport device (e.g., the first loader 22, etc.) and placed in the third cavity 308 (on the third cavity piece 326) with the surface on which the carrier C is exposed facing down. Next, the workpiece W supplied from the supply magazine 12 is transported by a transport device (e.g., the first loader 22, etc.) and placed on the first sealing resin R. Next, the second sealing resin R prepared in the resin preparation process is transported by a transport device (e.g., the first loader 22, etc.) and placed on the workpiece W with the surface on which the carrier C is exposed facing up.

As another example of the setting process, the first sealing resin R and the second sealing resin R prepared in the resin preparation process and the workpiece W supplied from the supply magazine 12 are stacked so that the workpiece W is sandwiched between the two (first and second) sealing resins R arranged so that the carriers C are on the outside (i.e., the first sealing resin R is prepared with the surface on which the carrier C is exposed on the lower side, the workpiece W is placed on the first sealing resin R, and the second sealing resin R is placed on the workpiece W with the surface on which the carrier C is exposed on the upper side). Next, the first sealing resin R, the workpiece W, and the second sealing resin R in the stacked state are transported by a transport device (e.g., the first loader 22, etc.) and placed in the third cavity 308 (on the third cavity piece 326). In this case, there is an advantage in that the workpiece W and the two sealing resins R are transported to the third mold 302 at one time, rather than separately.

After all of the above steps have been performed, a resin sealing step is performed in which the workpiece W is sealed with sealing resin R (sandwiched between two sealing resins R in this embodiment) and processed into a molded product Wp. Specifically, the third mold 302 is closed, and the third cavity piece 326 is raised relatively within the third cavity 308 to perform a mold closing step (third mold closing step) in which the sealing resin R is heated and pressurized against the workpiece W. This causes the sealing resin R to thermally harden, completing the resin sealing (compression molding) (see FIG. 18). The configuration of the molded product Wp is the same as that of FIG. 14A.

After the third mold closing step, the third mold 302 is opened, and the molded product Wp is separated from the used film F so that the molded product Wp can be removed (third mold opening step) (see FIG. 19). Next, a molded product removal step is performed in which the molded product Wp is removed from the third mold 302 by a conveying device (e.g., the second loader 24, etc.) and conveyed to the storage unit 10C.

After or in parallel with the molded product removal process, the third lower die film supply unit 311 and the third upper die film supply unit 313 are operated to carry out a film supply process (third lower die film supply process, third upper die film supply process) in which the used film F is sent out from within the third die 302 and a new film F is sent into and set within the third die 302.

After the molded product unloading process, a carrier peeling process is performed (the structure of the molded product Wp is the same as in FIG. 14B). After the carrier peeling process, a cutting process is performed (the structure of the molded product Wp is the same as in FIG. 14C). After the cutting process, a storage process is performed. All of these are specifically the same as in the first embodiment. It is also possible to omit the carrier peeling process or the cutting process.

The rest of the configuration of this embodiment is the same as that of the first embodiment described above, so repeated explanations will be omitted.

The second embodiment above can achieve the same effect as the first embodiment.

As explained above, according to the present invention, it is possible to prevent molding defects caused by uneven spreading of the sealing resin, residual gas, and dust generation during molding. In addition, it is possible to facilitate handling of the sealing resin, and it is possible to prevent the sealing resin from breaking during handling, especially when forming a thin molded product with a resin part thickness of 0.4 mm or less. Furthermore, by applying this to a configuration in which a cavity is provided in the upper mold and the workpiece is held in the lower mold, problems such as the workpiece falling can be solved.

The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the scope of the present invention.

1 Compression molding device 22 Conveyor device (first loader)
24 Transport device (second loader)
102 Tableting mold (first mold)
202 Sealing mold (second mold)
302 Sealing mold (third mold)
C Carrier F Release film R Sealing resin Rm Base resin W Work

Claims (9)

A compression molding apparatus that uses a sealing die having an upper die and a lower die to seal a workpiece with a sealing resin and process it into a molded product,
A compression molding apparatus, characterized in that a base resin to which a carrier is fixed is used as the sealing resin. 2. The compression molding apparatus according to claim 1, wherein the sealing resin is a solid resin formed into a predetermined shape by tableting a powder resin and fixing the carrier thereto. The compression molding apparatus according to claim 2, characterized in that the predetermined shape, when viewed in a plane, has the carrier disposed in the center and the base resin disposed on the periphery so as to cover the outer periphery of the carrier. The compression molding apparatus according to any one of claims 1 to 3, further comprising a conveying device that conveys the workpiece into the sealing mold while sandwiching the workpiece between two sealing resins arranged so that each carrier is on the outside. A compression molding method for molding a workpiece into a molded product by sealing the workpiece with a sealing resin using a sealing die having an upper die and a lower die,
a resin preparation step of preparing a base resin having a carrier fixed thereto as the sealing resin;
a conveying step of conveying the sealing resin into the sealing die;
and a resin sealing step of closing the sealing mold to seal the workpiece with the sealing resin and process it into the molded product. 6. The compression molding method according to claim 5, wherein the sealing resin is a solid resin formed into a predetermined shape by tableting a powder resin and fixing the carrier thereto. The compression molding method according to claim 6, characterized in that the predetermined shape, when viewed in a plane, has the carrier arranged in the center and the base resin arranged on the periphery so as to cover the outer periphery of the carrier. The compression molding method according to any one of claims 5 to 7, characterized in that the resin sealing process includes a step of setting the workpiece in the sealing mold in a state in which the workpiece is sandwiched between two sealing resins arranged so that each of the carriers is on the outside. The compression molding method according to any one of claims 5 to 7, characterized in that the transport process includes a process of transporting the workpiece into the sealing mold in a state in which the workpiece is sandwiched between two sealing resins arranged so that each of the carriers is on the outside.

Images