CN119305111A - A vertical rubber and plastic foam injection molding device - Google Patents
A vertical rubber and plastic foam injection molding device Download PDFInfo
- Publication number
- CN119305111A CN119305111A CN202411880102.7A CN202411880102A CN119305111A CN 119305111 A CN119305111 A CN 119305111A CN 202411880102 A CN202411880102 A CN 202411880102A CN 119305111 A CN119305111 A CN 119305111A
- Authority
- CN
- China
- Prior art keywords
- injection
- plasticizing barrel
- injection molding
- plasticizing
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 67
- 239000002984 plastic foam Substances 0.000 title claims 6
- 239000007924 injection Substances 0.000 claims abstract description 75
- 238000002347 injection Methods 0.000 claims abstract description 75
- 238000000465 moulding Methods 0.000 claims abstract description 47
- 238000002156 mixing Methods 0.000 claims abstract description 41
- 239000004033 plastic Substances 0.000 claims abstract description 33
- 229920003023 plastic Polymers 0.000 claims abstract description 33
- 238000005187 foaming Methods 0.000 claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004898 kneading Methods 0.000 description 9
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- -1 plasticizing Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012899 standard injection Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
- B29C44/424—Details of machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
本申请涉及一种立式橡塑发泡注塑成型装置，属于注塑成型技术领域。该注塑成型装置包括塑化料筒、混炼螺杆以及驱动机构，塑化料筒开设有用于注射气体的注气孔，驱动机构包括注塑缸体以及注塑活塞，塑化料筒和注塑缸体连通设置，注塑缸体的轴线与合模系统垂直，塑化料筒倾斜设置在注塑缸体，倾斜角度大于等于0°且小于90°；当倾斜角度等于0°时，注塑缸体和塑化料筒同轴设置，注塑活塞连接混炼螺杆；当倾斜角度大于等于0°且小于90°时，塑化料筒成为挤出系统并倾斜设置于所述注塑缸体侧壁。本申请具有降低设备设计成本和占地面积，简化整体设计，便于操作，极大的提高了橡塑发泡成型装置适用的广泛性和灵活性。
The present application relates to a vertical rubber and plastic foaming injection molding device, which belongs to the field of injection molding technology. The injection molding device includes a plasticizing barrel, a mixing screw and a driving mechanism. The plasticizing barrel is provided with an injection hole for injecting gas. The driving mechanism includes an injection cylinder and an injection piston. The plasticizing barrel and the injection cylinder are connected and arranged. The axis of the injection cylinder is perpendicular to the clamping system. The plasticizing barrel is tilted in the injection cylinder, and the tilt angle is greater than or equal to 0° and less than 90°; when the tilt angle is equal to 0°, the injection cylinder and the plasticizing barrel are coaxially arranged, and the injection piston is connected to the mixing screw; when the tilt angle is greater than or equal to 0° and less than 90°, the plasticizing barrel becomes an extrusion system and is tilted on the side wall of the injection cylinder. The present application has the advantages of reducing the equipment design cost and floor space, simplifying the overall design, facilitating operation, and greatly improving the wide application and flexibility of the rubber and plastic foaming molding device.
Description
Technical Field
The application relates to the technical field of injection molding, in particular to a vertical rubber and plastic foaming injection molding device.
Background
Foaming injection molding is an injection molding technology in which chemical or physical foaming agents are added into plastics, and injection molding is performed through an injection molding machine, so that the plastics are subjected to chemical reaction or physical change in the plasticizing process to generate a large amount of gas, or the gas is directly injected to be mixed and diffused with melt, so that the foaming effect is achieved. Foam injection molding machines are key devices to achieve this technology.
Foaming injection molding machines generally include an injection molding system, a heating system, a mold clamping system, a drive train, and an electrical control system. At present, the foaming injection molding equipment adopted at home and abroad is a horizontal injection molding machine. The injection molding system structure comprises a charging barrel, an injection screw rod arranged in the charging barrel, an injection cylinder for pushing the injection screw rod and a nozzle arranged at the end part of the charging barrel.
With respect to the related art, an injection molding system of the horizontal injection molding machine is generally horizontally arranged, and has large occupied area, so that the operation is inconvenient when the injection molding system is used for insert molding.
Disclosure of Invention
The application provides a vertical rubber and plastic foaming injection molding device, which aims to solve the problems of large occupied area and complex operation of the existing horizontal injection molding machine.
The application provides a vertical rubber and plastic foaming injection molding device which adopts the following technical scheme:
The utility model provides a vertical rubber and plastic foaming injection molding device, includes the plasticating feed cylinder, rotatory set up in mixing screw and actuating mechanism in the plasticating feed cylinder, the gas injection hole that is used for injecting gas is seted up to the plasticating feed cylinder, its characterized in that, actuating mechanism include the cylinder body of moulding plastics and slide install in the cylinder body of moulding plastics and be used for promoting the piston of moulding plastics of fuse-element, the plasticating feed cylinder with the cylinder body intercommunication of moulding plastics sets up, the axis of the cylinder body of moulding plastics is perpendicular with the compound die system, the plasticating feed cylinder slope sets up the cylinder body of moulding plastics, inclination is greater than or equal to 0 and is less than 90;
When the inclination angle is equal to 0 degree, the injection molding cylinder body and the plasticizing charging barrel are coaxially arranged, the injection molding piston is connected with the mixing screw rod, and the driving mechanism further comprises a rotation driving source for driving the injection molding piston to circumferentially rotate;
when the inclination angle is more than or equal to 0 degree and less than 90 degrees, the plasticizing charging barrel becomes an extrusion system and is obliquely arranged on the side wall of the injection molding cylinder body.
Through adopting above-mentioned technical scheme, plasticizing feed cylinder slope sets up at the cylinder body of moulding plastics, and the axis and the compound die system of the cylinder body of moulding plastics set up perpendicularly, have reduced equipment cost and area for the operation of moulding plastics is simplified, and the precision of moulding plastics improves, compares in the horizontal injection molding machine among the prior art, and the integrative two kinds of combinations that set up of the body or components of a whole that can function independently of above-mentioned foaming device and the cylinder body of moulding plastics set up, make the injection molding machine be applicable to medium and small-size foaming finished piece and large-scale finished piece respectively, improve the suitability.
Optionally, the plasticizing cylinder is provided with a flow limiting element for preventing the injected gas from flowing back to the feed inlet at one side of the gas injection hole away from the output end of the plasticizing cylinder, and the end part of the mixing screw is provided with a self-closing screw head for limiting the fluid from flowing to the die clamping system.
Through adopting above-mentioned technical scheme, at the in-process of moulding plastics, the discharge gate of injection molding machine can produce great pressure, through the setting of flow limiting element, can eliminate the melt and appear flowing back to the possibility of plasticizing feed cylinder, improves the quality and the stability of foaming injection molding product and protects each component in the plasticizing feed cylinder not to be damaged by injection high pressure.
Optionally, the plasticizing charging barrel is formed with air-adding section and mixing section in proper order between the flow limiting element and the self-closing screw head, the flow limiting element with the input port of plasticizing charging barrel has the feeding melting section, air-adding section with the gas injection hole corresponds the intercommunication.
Through adopting above-mentioned technical scheme, the material accomplishes basic plasticization in the reinforced melting section of screw rod, and the molten material enters into the air entrainment section through the flow limiting element, and gas enters into the air entrainment hole from the gas injection hole, and material and gas form even gas-liquid mixture after mixing, have reduced the viscosity of fuse-element, and gas becomes single-phase fluid after mixing evenly in mixing section and material fuse-element for the fuse-element flows more easily and fills the mould and generates the microbubble.
Optionally, the output end of the injection molding cylinder body is provided with a self-closing nozzle.
By adopting the technical scheme, the arrangement of the self-closing nozzle enables the preformed single-phase fluid to be temporarily stored in the injection molding cylinder body, and forms certain back pressure in the injection molding cylinder body so as to reduce the probability of pre-foaming.
Optionally, the advancing stroke of the mixing screw in the vertical position is less than or equal to twice the length of the diameter of the mixing screw.
Through adopting above-mentioned technical scheme, the propulsion stroke of the screw rod of moulding plastics in vertical position is less than the twice of its external diameter, can make the screw rod plasticize in the feed cylinder of moulding plastics and gas-liquid mixing more high-efficient, helps gaseous and fuse-element homogeneous mixing, and the volume when injection has been decided to the propulsion stroke of the screw rod of moulding plastics simultaneously, and the short stroke helps improving foaming injection molding's dimensional accuracy and stability.
Optionally, a coupling flange for obliquely mounting the plasticizing cylinder is arranged on the side wall of the injection molding cylinder body, and the coupling flange is provided with a coupling cavity communicated with the plasticizing cylinder body and the injection molding cylinder body.
Through adopting above-mentioned technical scheme, plasticization feed cylinder passes through flange and injection molding cylinder body fixed connection, forms stable connection structure, forms inseparable seal structure simultaneously, reduces single-phase fluidic revealing, and flange dismantles conveniently, can be comparatively light dismantlement and change the part, has reduced the maintenance degree of difficulty cost.
Optionally, the output end of the plasticizing cylinder is provided with a one-way valve, the one-way valve comprises a sealing valve core and a sealing spring connected with the sealing valve core, the sealing valve core is positioned towards one side of the self-closing screw head, and extrusion materials enter the injection molding cylinder body from the plasticizing cylinder body through the one-way valve, so that materials of the injection molding cylinder body are not allowed to flow back to the plasticizing cylinder body during injection.
Through adopting above-mentioned technical scheme, the check valve's setting in the plunger feed cylinder output for when the piston of moulding plastics removes, the check valve is in the closed condition, thereby can not pass to the plasticization feed cylinder with the high pressure when injecting, therefore the pressure of moulding plastics section of thick bamboo is lower, has reduced design and manufacturing cost.
Optionally, a pre-molding chamber for storing melt is arranged in the injection molding cylinder body, and the pre-molding chamber is correspondingly communicated with the connecting chamber.
By adopting the technical scheme, the single-phase fluid is conveyed to the pre-molding cavity under the extrusion pressure of the screw rod, the single-phase fluid is stored in the pre-molding cavity and is provided with proper back pressure by the plunger to prevent pre-foaming, after the pre-molding cavity has the capacity of one-time injection, the driving mechanism is started to inject the single-phase fluid into the mold, the check valve has a sealing effect on the injection pressure formed in the pre-molding cavity, and the backflow probability of the single-phase fluid is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
The plasticizing cylinder is obliquely arranged on the injection molding cylinder body, so that the occupied area is reduced, a workpiece with a complex and precise shape is conveniently formed, and efficient injection molding operation is facilitated;
according to the application, through the split inclined arrangement of the plasticizing charging barrel and the injection molding cylinder body, the mixing screw does not have the actions of pre-molding withdrawal and injection advance, the gas injection position is constant, so that the uniformity of mixing diffusion of gas and melt is improved, and the effective length of the screw can be shortened;
according to the application, through the arrangement of the pre-molding cavity, the single-phase fluid can finish accurate pre-molding volume in the pre-molding cavity and constant set back pressure is provided by the plunger, and the pressure and speed during injection can be accurately controlled by the plunger, so that the molding quality of the injection molding foaming piece is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of example 1.
Fig. 2 is a schematic cross-sectional view of example 2.
Fig. 3 is an enlarged partial schematic view at a in fig. 2.
The reference numerals are 1, plasticizing cylinder, 2, mixing screw, 3, driving mechanism, 4, heating element, 5, gas injection hole, 6, injection cylinder, 7, injection piston, 8, rotation driving source, 9, hopper, 10, opening, 11, conveying part, 12, flow limiting element, 13, self-closing nozzle, 14, gas filling section, 15, mixing section, 16, charging melting section, 17, self-closing screw head, 18, connecting flange, 19, connecting chamber, 20, one-way valve, 21, sealing chamber, 22, sealing valve core, 23, sealing spring, 24, mounting ring, 25, cylinder chamber, 26, pre-molding chamber.
Detailed Description
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. are directional or positional relationships indicated based on the orientation or positional relationships shown in the drawings, merely for convenience of description and to simplify the description, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and that these directional terms are not to be considered limiting, such as "up" and "down" are not necessarily limited to directions opposite or coincident with the direction of gravity, since the disclosed embodiments of the present invention may be arranged in different orientations. Furthermore, features defining "first" and "second" may explicitly or implicitly include one or more such features.
The application is described in further detail below with reference to fig. 1-3.
The embodiment of the application discloses a vertical rubber and plastic foaming injection molding device.
Examples
Referring to fig. 1, the vertical rubber and plastic foaming injection molding apparatus includes a plasticizing cylinder 1, a kneading screw 2 rotatably mounted to the plasticizing cylinder 1, and a driving mechanism 3 for injecting a melt. The plasticizing cylinder 1 can adopt the same components of a standard injection molding machine, and the outer side wall of the plasticizing cylinder 1 is sleeved with a plurality of heating elements 4 along the axial direction. The side wall of the plasticizing cylinder 1 has a gas injection hole 5 communicating to the inner cavity for injecting gas.
The drive mechanism 3 comprises an injection cylinder 6 and an injection piston 7 slidably mounted in the injection cylinder 6 for pushing a fluid. In this embodiment, the injection piston 7 is pushed vertically by a hydraulic cylinder. The injection cylinder 6 is arranged vertically to the mold clamping system of the injection molding machine. In the present embodiment, the injection cylinder 6 is arranged vertically. One end of the plasticizing charging barrel 1 is fixed on the side wall of the injection molding cylinder body 6, and the other end extends obliquely upwards. The top of the plasticizing cylinder 1 is provided with a hopper 9 for adding material. The inclination angle between the plasticizing cylinder 1 and the injection cylinder 6 is defined as α. Alpha is greater than or equal to 0 DEG and less than 90 deg.
If the equipment occupation area is limited greatly, but the allowable height of the workshop is not limited, alpha can be zero degrees, namely the plasticizing cylinder 1 and the injection molding cylinder 6 are parallel, and if the allowable height of the workshop is limited, alpha can be set according to actual requirements. In this embodiment, the angle α is equal to 0 °, and the plasticizing cylinder 1 and the injection cylinder 6 are coaxially disposed, and at this time, injection and plasticizing of the injection molding apparatus are integrated, and injection, plasticizing, gas injection, and kneading are performed in the plasticizing cylinder 1.
The plunger head of the injection piston 7 is fixedly connected with the end part of the mixing screw 2. The top of the injection piston 7 is further provided with a rotational driving source 8 for driving the injection piston 7 to rotate, and the rotational driving source 8 may be a hydraulic motor or an electric motor. In this example, the advance stroke of the kneading screw 2 is within 2D (D is the outer diameter of the kneading screw 2), and the aspect ratio of the kneading screw 2 is 24:1 or more.
The hopper 9 is arranged on the side wall of the plasticizing cylinder 1, the hopper 9 comprises an opening part 10 with an upward opening and a conveying part 11 which is obliquely arranged, and the conveying part 11 and the inner cavity of the plasticizing cylinder 1
The middle part of the inner cavity of the plasticizing charging barrel 1 is provided with a flow limiting element 12, and the flow limiting element 12 can be a one-way check valve or a flange and other flow limiting structures for preventing the injected gas from flowing back to the charging port. In this embodiment, the restriction element 12 is a one-way check valve. The bottom of the plasticizing cylinder 1 is provided with a self-closing nozzle 13, and the principle of the self-closing nozzle 13 is consistent with the structure of the one-way valve body, so that the probability that single-phase fluid in the connecting cavity 19 enters a die clamping system before the injection piston 7 is started is reduced.
The plasticizing cylinder 1 has a cylinder chamber 25 for material transport, the cylinder chamber 25 being formed with an air-entraining section 14 and a mixing section 15 between the flow-limiting element 12 and the self-closing nozzle 13, the air-entraining section 14 and the air-entraining aperture 5 being in corresponding communication. A charging melting section 16 is provided between the flow restriction element 12 and the hopper 9. The materials are heated and initially plasticized in the charging melting section 16, and then mixed with gas in the gas charging section 14 through the flow limiting element 12, and the materials and the gas are uniformly mixed to form single-phase fluid along with the conveying of the mixing screw 2.
The output end of the mixing screw 2 is also provided with a self-closing screw head 17, the front end of the self-closing screw head 17 is provided with a pre-molding cavity 26 and is communicated with the connecting hole of the self-closing nozzle 13, and when the single-phase fluid of the mixing section 15 is accumulated to a certain capacity at the self-closing screw head, the mixing screw 2 stops rotating, and the self-closing screw head 17 is automatically closed.
The vertical rubber and plastic foaming injection molding device is suitable for molding medium and small-sized workpieces, and comprises the following specific processes that materials are added from a hopper 9, a rotary driving source 8 is started, the materials are conveyed downwards in a feeding melting section 16 under the action of self gravity and the rotation of a mixing screw 2, the materials are basically plasticized after being heated in the feeding melting section 16, then fluid enters an air-entraining section 14 through a flow limiting element 12, the materials are uniformly mixed with gas in the mixing section 15 to form single-phase fluid, the single-phase fluid enters a self-closing screw head 17, and the single-phase fluid is stored in a front-end pre-molding cavity 26 of the self-closing screw head 17.
The self-closing nozzle 13 is in a closed state, and the driving mechanism 3 can apply a certain pressure to the mixing screw 2, so that the pre-molding chamber 26 has a certain back pressure, single-phase fluid cannot be pre-foamed, the single-phase fluid is gradually accumulated in front of the self-closing screw head 17, the mixing screw 2 is retracted to a preset pre-molding volume under the action of the back pressure preset by the piston of the driving mechanism 3, and the rotation is stopped;
After the mold filling is started, the self-closing nozzle 13 is completely closed to act as a plunger, and single-phase fluid is injected into a mold runner under the action of the driving mechanism 3. After the mold filling is finished, the product is foamed and cooled in the mold, the mixing screw 2 starts to rotate, and the next mold filling period starts.
Examples
The present embodiment is different from embodiment 1 in that the plasticizing cylinder and the driving mechanism are two devices, respectively. The plasticizing cylinder becomes an extruder for plasticizing, air-entraining and kneading without reciprocating injection. The injection is performed by the driving mechanism.
In this embodiment, the angle α is greater than 0 ° and less than 90 °, and the plasticizing cylinder 1 and the injection cylinder 6 are disposed obliquely. Plasticizing, gas injection and mixing are carried out in the plasticizing charging barrel 1.
A connecting flange 18 is arranged between one end of the bottom of the plasticizing cylinder 1 and the injection molding cylinder body 6, and two opposite sides of the connecting flange 18 are respectively fixed with the plasticizing cylinder 1 and the injection molding cylinder body 6 through bolts. The coupling flange 18 has a coupling chamber 19 penetrating both side end surfaces in the horizontal direction and communicating the injection cylinder 6 and the plasticizing cylinder 1.
The plasticizing cylinder 1 is further provided with a one-way valve 20 at the end near the coupling chamber 19, the cylinder chamber 25 having a sealing chamber 21 cooperating with the one-way valve 20. The check valve 20 includes a seal spool 22 and a seal spring 23 connected to the seal spool 22. The seal chamber 21 has a fixed mounting ring 24 therein for the end of the seal spring 23. The sealing spool 22 is located on the side of the sealing spring 23 remote from the coupling chamber 19, and when the sealing spring 23 is in a normal state, the sealing spool 22 closes the outlet of the sealing chamber.
The plasticizing cylinder 1 has a cylinder chamber 25 in which the kneading screw 2 is rotatably mounted. A rotation driving source 8 (not shown in fig. 2) for driving the kneading screw 2 to rotate is mounted on the top of the plasticizing cylinder 1, and the rotation driving source 8 may be a hydraulic motor or an electric motor.
A pre-molding chamber 26 for temporarily storing single-phase fluid is arranged between the plunger head of the injection molding piston 7 and the inner cavity outlet of the injection molding cylinder body 6, and the pre-molding chamber 26 is communicated with the connecting chamber 19 of the connecting flange 18. The bottom of the injection cylinder 6 has a self-closing nozzle 13 communicating with the clamping system, the principle of the self-closing nozzle 13 being identical to the structure of the one-way valve 20 for reducing the probability of single-phase fluid of the coupling chamber 19 entering the clamping system before the injection piston 7 is started.
The vertical rubber-plastic foaming injection molding device is widely applicable to molding of various workpieces, particularly large-sized workpieces, and comprises the following specific processes that materials are poured from a hopper 9, heated and pre-plasticized in a feeding melting section 16, the pre-molded materials enter an air-filling section 14 through a flow limiting element 12, the materials and gas are fully mixed in a mixing section 15 to form single-phase fluid, the pressure of the single-phase fluid is continuously increased under the powerful pushing of an extrusion screw until reaching preset back pressure, the back pressure is high enough to open a self-closing screw head 17 and a one-way valve 20, the single-phase fluid enters a pre-molding chamber 26 along a sealing chamber 21 and a connecting chamber 19, and when the fluid in the pre-molding chamber 26 is stored to the pre-molding quantity capable of realizing one-time injection, a pushing driving source is started, so that the fluid is pressed into a die clamping system.
In contrast to example 1, the kneading screw 2 of this example has no operation of retracting and advancing the preform, and therefore the length of the air-entraining segment 14 of this example is smaller than that of example 1. The air-filling section 14 only needs to correspond to the air-filling hole.
The one-way valve 20 in the plasticizing cylinder 1 is arranged, so that single-phase fluid can freely enter the pre-plasticizing cavity 26, but cannot flow back to the plasticizing cylinder 1, after the fluid pre-plasticizing of the pre-plasticizing cavity 26 is completed, the injection piston 7 pushes injection, the one-way valve 20 is automatically closed under the action of pressure, and the injected high pressure is not transmitted into the plasticizing cylinder 1, so that the design cost of the plasticizing cylinder 1 and the mixing screw 2 of the embodiment is lower. The principle of the present example as a single-phase fluid is the same as that of example 1, but the screw of the present example has no axial displacement, and the uniformity and solubility of gas injection are superior to those of example 1.
In example 1 and the prior art, the back pressure of the single-phase fluid during plasticizing is directly provided by the driving mechanism 3, while in this example the pre-molding back pressure of the mixing screw 2 is converted to be similar to the head pressure of the extruder plus the pressure of the injection piston 7, so that the pressure control requirement for pre-molding the mixing screw 2 is reduced, and thus the self-sealing capability requirement of the flow limiting element 12 and the self-closing screw head 17 is not required to be very high. Under specific conditions, the mixing screw 2 can keep low-speed rotation and keep the lowest pressure after the pre-molding is finished, the pre-foaming of the gas-containing melt from the middle part of the mixing screw 2 to the self-closing screw head 17 is prevented, the self-closing screw head 17 and the flow limiting element do not need to be completely self-closed, or the structural design of the two one-way valves (the self-closing screw head 17 and the flow limiting element) can be canceled under the proper low-speed rotation condition, so that the integral design is simplified.
The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411880102.7A CN119305111A (en) | 2024-12-19 | 2024-12-19 | A vertical rubber and plastic foam injection molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411880102.7A CN119305111A (en) | 2024-12-19 | 2024-12-19 | A vertical rubber and plastic foam injection molding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119305111A true CN119305111A (en) | 2025-01-14 |
Family
ID=94189566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411880102.7A Pending CN119305111A (en) | 2024-12-19 | 2024-12-19 | A vertical rubber and plastic foam injection molding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119305111A (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3793416A (en) * | 1969-12-24 | 1974-02-19 | Huels Chemische Werke Ag | Process for injection molding foam synthetic resin materials involving introduction of the expansion agent into the metering zone between injection molding steps |
| CN2385863Y (en) * | 1999-05-05 | 2000-07-05 | 湖北省鄂州市碧石塑料机械厂 | Vertical rotary table injection molding machine |
| JP2003191272A (en) * | 2001-12-25 | 2003-07-08 | Sekisui Chem Co Ltd | Method for manufacturing thermoplastic resin foam |
| CN1668441A (en) * | 2002-07-18 | 2005-09-14 | 特瑞赛尔公司 | Polymer processing systems including screws |
| CN1899800A (en) * | 2006-07-19 | 2007-01-24 | 北京化工大学 | Micro foaming injection moulding plasticizing device and its producing process |
| CN101172383A (en) * | 2006-08-23 | 2008-05-07 | 苏舍化学技术有限公司 | Method of producing molding material |
| CN201198187Y (en) * | 2007-09-18 | 2009-02-25 | 大连市水利科学研究所 | Cellular plastic extruding system |
| CN102120353A (en) * | 2010-12-15 | 2011-07-13 | 常州智林塑胶有限公司 | Injection molding machine |
| CN102161227A (en) * | 2010-12-27 | 2011-08-24 | 东华机械有限公司 | Injection molding mechanism with large injection volume |
| CN204354386U (en) * | 2014-12-04 | 2015-05-27 | 佛山市顺德区金垒精密机械有限公司 | A kind of rope saw Special precision injection forming equipment |
| CN204673963U (en) * | 2014-12-24 | 2015-09-30 | 博创机械股份有限公司 | A kind of Novel injection moulding machine penetrates platform accumulator storing glue sealing structure |
| CN109968592A (en) * | 2019-03-29 | 2019-07-05 | 周仲良 | A kind of centre of gravity vertical injection molding machine |
| CN209566473U (en) * | 2018-12-12 | 2019-11-01 | 江西丰迪新材料有限公司 | A kind of injection molding machine exhaust gear |
| CN210211245U (en) * | 2019-04-24 | 2020-03-31 | 宁波金亿精密机械有限公司 | Special barrel screw rod for injection molding of silica gel product |
| CN212242006U (en) * | 2020-05-14 | 2020-12-29 | 东莞塘厦合益塑胶五金制品有限公司 | A pre-dissolved glue injection device |
| CN113579196A (en) * | 2021-07-15 | 2021-11-02 | 伯乐智能装备有限公司 | Method for manufacturing light alloy modified product |
| CN214645385U (en) * | 2021-05-06 | 2021-11-09 | 三河市双田模塑有限公司 | High-effect vertical injection molding machine with automatic feeding and taking manipulator |
| CN215791272U (en) * | 2021-07-19 | 2022-02-11 | 泉州市世创机械制造有限公司 | EVA grabs material device that hinders of system bubble |
| CN220331795U (en) * | 2023-07-14 | 2024-01-12 | 伊之密股份有限公司 | Foaming injection molding device and injection molding machine |
-
2024
- 2024-12-19 CN CN202411880102.7A patent/CN119305111A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3793416A (en) * | 1969-12-24 | 1974-02-19 | Huels Chemische Werke Ag | Process for injection molding foam synthetic resin materials involving introduction of the expansion agent into the metering zone between injection molding steps |
| CN2385863Y (en) * | 1999-05-05 | 2000-07-05 | 湖北省鄂州市碧石塑料机械厂 | Vertical rotary table injection molding machine |
| JP2003191272A (en) * | 2001-12-25 | 2003-07-08 | Sekisui Chem Co Ltd | Method for manufacturing thermoplastic resin foam |
| CN1668441A (en) * | 2002-07-18 | 2005-09-14 | 特瑞赛尔公司 | Polymer processing systems including screws |
| CN1899800A (en) * | 2006-07-19 | 2007-01-24 | 北京化工大学 | Micro foaming injection moulding plasticizing device and its producing process |
| CN101172383A (en) * | 2006-08-23 | 2008-05-07 | 苏舍化学技术有限公司 | Method of producing molding material |
| CN201198187Y (en) * | 2007-09-18 | 2009-02-25 | 大连市水利科学研究所 | Cellular plastic extruding system |
| CN102120353A (en) * | 2010-12-15 | 2011-07-13 | 常州智林塑胶有限公司 | Injection molding machine |
| CN102161227A (en) * | 2010-12-27 | 2011-08-24 | 东华机械有限公司 | Injection molding mechanism with large injection volume |
| CN204354386U (en) * | 2014-12-04 | 2015-05-27 | 佛山市顺德区金垒精密机械有限公司 | A kind of rope saw Special precision injection forming equipment |
| CN204673963U (en) * | 2014-12-24 | 2015-09-30 | 博创机械股份有限公司 | A kind of Novel injection moulding machine penetrates platform accumulator storing glue sealing structure |
| CN209566473U (en) * | 2018-12-12 | 2019-11-01 | 江西丰迪新材料有限公司 | A kind of injection molding machine exhaust gear |
| CN109968592A (en) * | 2019-03-29 | 2019-07-05 | 周仲良 | A kind of centre of gravity vertical injection molding machine |
| CN210211245U (en) * | 2019-04-24 | 2020-03-31 | 宁波金亿精密机械有限公司 | Special barrel screw rod for injection molding of silica gel product |
| CN212242006U (en) * | 2020-05-14 | 2020-12-29 | 东莞塘厦合益塑胶五金制品有限公司 | A pre-dissolved glue injection device |
| CN214645385U (en) * | 2021-05-06 | 2021-11-09 | 三河市双田模塑有限公司 | High-effect vertical injection molding machine with automatic feeding and taking manipulator |
| CN113579196A (en) * | 2021-07-15 | 2021-11-02 | 伯乐智能装备有限公司 | Method for manufacturing light alloy modified product |
| CN215791272U (en) * | 2021-07-19 | 2022-02-11 | 泉州市世创机械制造有限公司 | EVA grabs material device that hinders of system bubble |
| CN220331795U (en) * | 2023-07-14 | 2024-01-12 | 伊之密股份有限公司 | Foaming injection molding device and injection molding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1110814A (en) | Sequential co-injection unit adapted for structural foam molding | |
| CN1668441A (en) | Polymer processing systems including screws | |
| CN101380798B (en) | Micropore injection molding apparatus | |
| CN103057061B (en) | Efficient mixing microcellular plastics precise injection molding apparatus and method | |
| US11911945B2 (en) | Injection molding machine and injection molding method | |
| US20030011090A1 (en) | Injection molding method | |
| CN105751461B (en) | Vibrate the inner screw channel screw of injection forming machine of plunger | |
| CN201279881Y (en) | Micropore injection mould apparatus | |
| CN101417495B (en) | Plastic foam injection forming method and device thereof | |
| CN119305111A (en) | A vertical rubber and plastic foam injection molding device | |
| KR100979764B1 (en) | Low pressure injection machine | |
| CN101417494B (en) | Plastic foam injection forming device | |
| CN201922563U (en) | Integrated machine with extrusion and ejection molding | |
| CN101786326A (en) | Integrated extrusion molding and injection molding machine | |
| CN217968009U (en) | Preparation device of supercritical foaming product | |
| CN213860532U (en) | Micro-foaming injection charging barrel | |
| CN206551430U (en) | A kind of injection mixing syringe | |
| CN203157068U (en) | High-efficiency mixing microporous foamed plastic precise injection forming device | |
| CN205705155U (en) | The inner screw channel screw of injection forming machine of vibration plunger | |
| JP2002137270A (en) | Injection molding method and injection molding machine | |
| US11400625B2 (en) | Injection foam molding method | |
| CN113858529A (en) | Injection molding device for producing bottle caps and using method thereof | |
| US6531087B1 (en) | Coupled fluid injection with same power source | |
| CN201304703Y (en) | Injection molding device for expandable plastic | |
| CN222387541U (en) | A double-head injection molding device for plastic remote control car shell injection molding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |