JP5601935B2 - Scroll-type compressor seal member molding apparatus, scroll-type compressor seal member manufacturing method, and scroll-type compressor seal member - Google Patents

Description

  The present invention relates to a molding apparatus for a scroll compressor seal member, a method for manufacturing a scroll compressor seal member, and a scroll compressor seal member.

  The scroll type compressor forms a compression chamber by meshing a pair of fixed scroll and turning scroll. The fixed scroll and the orbiting scroll are provided with a spiral wrap, and a seal groove along the spiral direction is provided on the spiral tip surface. By fitting and installing a seal member in this seal groove, the tip gap formed between the tip of the spiral wrap and the bottom surface of the other scroll when the fixed scroll and the orbiting scroll are meshed is sealed, Gas leakage is reduced and compression efficiency is improved.

  The seal member is usually manufactured by injection molding a resin material. As the seal member, an injection-moldable resin material, for example, a thermoplastic resin such as polyphenylene sulfide resin (hereinafter referred to as PPS resin) or polytetrafluoroethylene resin (hereinafter referred to as PTFE resin) is used. Carbon fiber, organic powder, metal powder, and the like are added to the resin material in order to impart wear resistance and strength resistance.

  In order to improve manufacturing efficiency, the seal member is manufactured by a plurality of molds that simultaneously form a plurality of spiral seals. The resin material is injected into a spiral mold through a spool, a runner, and a gate.

Patent Documents 1 to 3 disclose a method for manufacturing a tip seal for a scroll compressor.
In Patent Document 1, the position of the injection gate for the resin material is set to substantially the center of the entire length of the chip seal, so that the material characteristics are uniform over the entire length of the chip seal and the sealing performance of the scroll compressor is stabilized. .

In Patent Document 2, the resin material is injected from the end portion of the spiral tip seal into the molding portion of the spiral tip seal so that no branch point of the resin flow is generated, and the strength of the spiral tip seal is increased to improve durability. It is improving.
In addition, when the resin material is injection-molded, the chip seal is molded integrally with the runner via the gate, so that a step of separating the gate from the chip seal is required.

  In Patent Document 3, the gate is formed in a substantially banana shape, and the injection hole of this gate is a surface on the inner surface of the cavity that forms the back surface corresponding to the bottom surface of the mounting groove when the chip seal is mounted in the mounting groove. The chip seal is formed by injecting a plastic material into the cavity from the injection hole. Accordingly, post-processing such as gate separation and finishing processing for eliminating gate marks can be omitted.

Japanese Patent No. 2787849 Japanese Patent No. 2607790 Japanese Patent No. 3401437

  In the manufacturing method described in Patent Document 1, when the gate position is set approximately near the center of the entire length of the chip seal, the injected resin material is divided into both ends of the mold with the gate as a branch point. The tip seal thus formed has a problem that the branch point portion is weak in strength.

  In the manufacturing method described in Patent Document 2, the mass of the resin material remaining in the non-product part such as the spool or the runner is larger than the weight of the resin material injected into the product part (chip seal), and the material yield is poor. There's a problem.

  If carbon fiber or PTFE filler is added to the resin material, the fluidity of the resin material decreases. The mold for molding the chip seal is elongated and spiral. Therefore, even if manufactured by the method described in Patent Document 1 to Patent Document 3, if the resin material to be used has low fluidity, the injected resin material does not reach the far end of the mold, and the middle of the mold The problem of clogging (short shot) occurs. Moreover, when the fluidity | liquidity of the resin material to be used is low, a dent and a dent (sink) will arise by molding shrinkage, and a product yield will worsen.

  The present invention has been made in view of such circumstances, and even when a resin material having low fluidity is used, it is difficult to cause a short shot, and a chip seal with a good material yield and product yield. An object is to provide a manufacturing method.

  In order to solve the above-mentioned problems, the present invention is a molding apparatus for injection-molding a scroll-type compressor seal member that is incorporated in a seal groove provided on the front end surface of a scroll spiral wrap and seals a compression chamber. The molding apparatus includes a first cavity including a winding start end portion and a second cavity including a winding end end portion, and the shape of the seal groove disposed so that the other end portions of the cavities face each other. And a first gas vent provided in a range of 10% to 50% of the total length of the first cavity from the winding start end on both sides in the longitudinal direction of the first cavity. The groove and the second cavity are provided on both sides of the second cavity in the longitudinal direction within a range of 10% to 50% with respect to the total length of the second cavity from the winding end. Providing a venting groove, wherein a gate communicating simultaneously resin material can be injected into each cavity from the other end side of each cavity, the molding device of the sealing member for a scroll type compressor comprising a.

According to the above invention, the gas vent groove is provided in the range from 10% to 50% with respect to the total length of each cavity from the winding start end and winding end end, that is, the final filling position of the resin material. Since the gas vent groove is shallower than the cavity, the resin material is easily cooled and solidified. If a gas vent groove is provided in the vicinity of the gate, the resin material is cooled and solidified in the vicinity of the gate, thereby hindering the subsequent flow of the resin. Then, the flow rate of the resin material becomes slow, and the flow of the resin material stops before reaching the far end. In order to prevent this, the gas vent groove is not intentionally provided near the gate.
If the gas vent groove is too short or too long, the gas venting ability is lowered. By providing the gas venting groove in the above range, even if a resin material having low fluidity is used, the molding device can fill the resin material into each cavity without performing a short shot. Further, even when the resin material is filled into a thin cavity having a long flow distance, it is difficult to make a short shot, so that the product yield can be improved. Further, since the area of the burr that can be formed in the product portion corresponding to the gas vent groove is reduced, the cost for the surface treatment can be reduced.

1 aspect of this invention WHEREIN: The said 1st vent groove is provided in the range of 10% or more and 20% or less with respect to the full length of the said 1st cavity from the said winding start end part, The said 2nd vent groove is It is preferable that the winding end is provided in a range of 10% to 20% with respect to the entire length of the second cavity.
By providing the gas vent groove in the above range, it is possible to reduce the area of the burr that can be formed in the product portion corresponding to the gas vent groove while preventing short shots.

  The present invention is a molding apparatus for injection-molding a scroll-type compressor seal member that is incorporated in a seal groove provided on the front end face of a scroll spiral wrap and seals a compression chamber, the molding apparatus comprising: A spiral cavity corresponding to the shape of the seal groove, which is composed of a first cavity including a winding start end and a second cavity including a winding end end, and is arranged so that the other end of each cavity faces each other; A first gas vent groove provided at the winding start end portion in communication with the first cavity; and a second gas vent groove provided at the winding end end portion in communication with the second cavity; A device for forming a seal member for a scroll compressor, comprising: a gate communicated with the cavity from the other end side of each cavity so that a resin material can be injected simultaneously. To provide.

  According to the above invention, the gas vent groove is provided at the winding start end and the winding end end, that is, at the final filling position of the resin material so as to communicate with each cavity. By providing the gas venting groove at the above position, even if a resin material with low fluidity is used, the molding device can fill the resin material in each cavity without performing a short shot. Further, even when the resin material is filled into a thin cavity having a long flow distance, it is difficult to make a short shot, so that the product yield can be improved. Further, by providing the gas vent groove at the end of the cavity, the area of the burr that can be formed in the product portion corresponding to the gas vent groove is reduced. As a result, the cost for the surface treatment can be reduced.

  1 aspect of this invention WHEREIN: The said shaping | molding apparatus is provided with a fixed mold and a movable mold, and the said fixed mold is resin simultaneously to each cavity on the outer periphery upper side of the said cavity and the other end part of each said cavity. A rectangular injection hole that allows injection of material, and a fan gate having a bottom surface that is inclined so as to become thinner toward the injection hole side, and the movable mold includes an upper surface of the fan gate. A convex portion formed in a linear shape along the outer periphery of the cavity may be provided so that a notch is provided in the cavity.

  By making the injection hole of the gate rectangular, the resin material can easily flow. Moreover, the mass of the resin material with which the non-product part of a shaping | molding apparatus is filled can be reduced by using a gate as a fan gate. The movable mold has a linear protrusion formed along the outer periphery of the cavity. The protrusion acts to form a notch on the upper surface of the fan gate when the product is taken out. Since the bottom surface of the fan gate is inclined so that the thickness of the fan gate becomes thinner toward the injection hole, gate cutting after product molding becomes easy. Here, the “upper surface” of the fan gate means the surface on the side corresponding to the tool surface of the product. The “bottom surface” of the fan gate means a surface on the side corresponding to the non-tool surface of the product. The “tool surface” of the product is a surface disposed above the seal groove of the scroll-type compressor seal member. The “non-tool surface” of the product is a surface disposed on the bottom surface side of the seal groove of the scroll compressor seal member.

  In one aspect of the present invention, a recess is formed on an end surface or an outer peripheral side surface of the other end of each cavity, and a gate injection hole communicates with the recess so that a resin material can be injected into each cavity simultaneously. good.

  When a recess is formed on the other end side of each cavity, that is, the end surface or outer peripheral side surface on the side where the resin material is injected, a hollow that is recessed on the product side is formed on the end surface or side surface of the seal member when the product is used. The By connecting the injection hole of the gate to the recess, a gate mark is formed in the recess when the product is manufactured, so that the surface treatment process of the gate cut portion can be omitted.

In the one aspect, it is preferable that the concave portion is formed at a position corresponding to the center in the thickness direction of the seal member or the non-seal surface side of the seal member.
The recess may be formed at a place other than the portion corresponding to the tool surface of the seal member.
By providing the concave portion in the center in the thickness direction of the seal member, both the front and back surfaces of the molded seal member can be used as a tool surface. For example, when the lengths of the first cavity and the second cavity are equal, the first cavity is applied to the inner peripheral side sealing groove of the fixed scroll of the scroll compressor having a step portion in the height direction of the wrap, The second cavity can be applied to the outer peripheral side sealing groove of the orbiting scroll.

  The present invention relates to a molding apparatus for injection-molding a scroll-type compressor seal member that is incorporated in a seal groove provided on the front end surface of a scroll spiral wrap to seal a compression chamber, and the molding apparatus is fixed. A mold and a movable mold, wherein the fixed mold is composed of a first cavity including a winding start end and a second cavity including a winding end, and the other ends of the cavities face each other. A spiral-shaped cavity corresponding to the shape of the seal groove arranged and a rectangular injection hole communicating with the cavity on the outer periphery of the other end of each cavity at the same time so that a resin material can be simultaneously injected into the cavity. A fan gate with a part of the bottom surface inclined so as to become thinner toward the hole side, and the movable mold is provided with a notch on the upper surface of the fan gate. Providing molding apparatus of the sealing member for a scroll type compressor provided with a convex portion formed in a linear shape along the outer periphery of the serial cavity.

  The present invention relates to a molding apparatus for injection-molding a scroll-type compressor seal member that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber, and has a winding start end portion. Each of the cavities includes a spiral cavity corresponding to the shape of the seal groove, the first cavity including a second cavity including a winding end, and the other end of each cavity disposed so as to face each other. A molding apparatus for a seal member for a scroll compressor, in which a recess is formed on the end surface or outer peripheral side surface of the other end portion, and the injection hole of the gate is communicated with the cavity so that a resin material can be simultaneously injected into each cavity. provide.

  The present invention also provides a method for manufacturing a scroll-type compressor seal member that is incorporated in a seal groove provided on the front end surface of a scroll spiral wrap and seals a compression chamber. As a spiral cavity corresponding to the shape of the groove, a first cavity including a winding start end and a second cavity including a winding end end are provided such that the other ends of the cavities face each other, Gas venting grooves are provided on both sides in the longitudinal direction of the first cavity in a range of 10% to 50% with respect to the total length of the first cavity from the winding start end, and the second gas venting groove is provided in the first cavity. Provided in the range of 10% to 50% of the total length of the second cavity from the winding end end on both sides in the longitudinal direction of the two cavities, and a gate is provided on the other end side of each cavity. A sealing member for a scroll type compressor, in which a resin material is communicated to each cavity at the same time so that the resin material is melted from the injection hole of the gate and injected into each cavity. A manufacturing method is provided.

  By manufacturing in this way, even when a resin material with low fluidity is used, it is possible to prevent a short shot because the resin does not flow in the cavity. Further, even when the resin material is filled into a thin cavity having a long flow distance, short shots can be made difficult. Thereby, the product yield can be improved. Compared with the case where the gas vent groove is provided over the entire circumference of the cavity, the area of the burr that can be formed in the product portion corresponding to the gas vent groove is reduced, so that the cost for the surface treatment can be reduced.

  In one aspect of the invention, the first gas vent groove is provided on both sides in the longitudinal direction of the first cavity in a range of 10% or more and 20% or less with respect to the total length of the first cavity from the winding start end. It is preferable that the second gas vent groove is provided on both sides in the longitudinal direction of the second cavity in a range of 10% or more and 20% or less with respect to the total length of the second cavity from the winding end.

  The present invention relates to a method of manufacturing a scroll-type compressor seal member that is incorporated in a seal groove provided on a front end face of a scroll spiral wrap and seals a compression chamber. As a spiral cavity corresponding to the shape, a first cavity including a winding start end and a second cavity including a winding end are provided so that the other ends of the cavities face each other, and the first gas vent A groove is provided in the winding start end portion in communication with the first cavity, a second gas vent groove is provided in the winding end end portion in communication with the second cavity, and a gate is provided in each cavity. The resin material is communicated from the other end side of each of the cavities to the respective cavities at the same time, and the resin material melted from the injection holes of the gate is injected into the cavities before the resin material is injected. It provides a method for manufacturing a scroll type compressor sealing member for molding the seal member.

  By manufacturing in this way, even when a resin material with low fluidity is used, it is possible to prevent a short shot because the resin does not flow in the cavity. Further, even when the resin material is filled into a thin cavity having a long flow distance, short shots can be made difficult. Thereby, the product yield can be improved. Compared with the case where the gas vent groove is provided over the entire circumference of the cavity, the area of the burr that can be formed in the product portion corresponding to the gas vent groove is reduced, so that the cost for the surface treatment can be reduced.

  In one aspect of the invention described above, the cavity is provided in the fixed mold of the molding apparatus including a fixed mold and a movable mold, the rectangular injection hole is provided, and the mold is thinned toward the injection hole side. A fan gate having a partly inclined bottom surface is provided so that a resin material can be simultaneously injected into the respective cavities from the upper outer periphery of the other end of each cavity, and the movable mold is provided on the upper surface of the fan gate. You may provide a linear convex part along the outer periphery of the said cavity so that a notch part may be formed.

  By making the gate a fan gate having a rectangular injection hole, the mass of the resin material filled in the non-product portion of the molding apparatus can be reduced. Thereby, the material yield can be improved. The movable mold is formed with a convex portion along the outer periphery of the cavity. The protrusion acts to form a notch on the upper surface of the fan gate when the product is taken out. The bottom surface of the fan gate is inclined so that the thickness of the fan gate decreases toward the injection hole, and facilitates gate cutting after product molding together with the notch.

In one aspect of the invention described above, a recess may be formed on an end surface or an outer peripheral side surface on the other end side of each cavity, and a gate injection hole may be provided in the recess so that a resin material can be simultaneously injected into each cavity. .
By manufacturing in this way, the gate trace can be positioned in the recess formed on the product side, and thus the surface treatment process of the gate cut portion can be omitted.

In the one aspect, it is preferable that the concave portion is formed at a position corresponding to the center in the thickness direction of the seal member or the non-seal surface side of the seal member.
The recess may be formed in a place other than the portion corresponding to the tool surface of the seal member. Further, by providing the concave portion in the center in the thickness direction of the seal member, it is possible to manufacture a seal member in which both the front and back surfaces of the molded seal member can be applied as a tool surface.

  The present invention relates to a method for manufacturing a scroll-type compressor seal member that is incorporated in a seal groove provided on a front end surface of a scroll wrap and seals a compression chamber, and includes a fixed mold and a movable mold. A first cavity including a winding start end and a second cavity including a winding end end are provided as spiral cavities corresponding to the shape of the seal groove in the fixed mold of the molding apparatus including The other end of each cavity is provided with a fan gate provided with the other end portions of the cavities facing each other, having a rectangular injection hole, and having a part of the bottom surface inclined so as to become thinner toward the injection hole side. A resin material can be simultaneously injected into each cavity from the outer periphery of the outer periphery, and the movable mold is linear along the outer periphery of the cavity so that a notch is provided on the upper surface of the fan gate. A convex portion is provided, to provide a method for manufacturing a scroll type compressor sealing member for molding the seal member the resin material is melted from the injection hole injection to the in each cavity.

  The present invention relates to a method of manufacturing a scroll-type compressor seal member that is incorporated in a seal groove provided on a front end face of a scroll spiral wrap and seals a compression chamber. As a spiral cavity corresponding to the shape, a first cavity including a winding start end portion and a second cavity including a winding end end portion are provided so that the other end portions of the respective cavities face each other. A recess is formed on the end surface or outer peripheral side surface on the other end side, and an injection hole of a gate is provided in the recess so that a resin material can be simultaneously injected into each cavity, and the resin material melted from the injection hole is Provided is a method for manufacturing a seal member for a scroll compressor, which is injected into a cavity to form the seal member.

The present invention also relates to a scroll-type compressor seal member that is incorporated in a seal groove provided on the front end surface of the scroll spiral wrap and seals the compression chamber, and has one end surface or one outer peripheral side surface. The present invention provides a scroll-type compressor seal member in which a recess is provided in the recess and a gate mark is disposed in the recess.
According to the present invention, since the gate mark is located in the concave portion of the product, the sealing member can be omitted so that the surface treatment process of the gate cut portion can be omitted.

In the above invention, it is preferable that the concave portion is provided in the center in the thickness direction of the outer peripheral side surface of the one end surface or the one end portion or on the non-seal surface side.
The recess may be formed in a portion of the seal member that is not the tool surface. When the concave portion is provided at the center in the thickness direction of the seal member, both the front and back surfaces of the molded seal member can be applied as a tool surface.

  According to the present invention, even when a resin material having low fluidity is used, a short shot is hardly generated, and a molding apparatus for a scroll-type compressor seal member with a high material yield and product yield is obtained.

It is a figure which shows the compression mechanism of the scroll compressor to which the sealing member which concerns on one Embodiment of this invention is applied. It is a top view of the product part of the molding apparatus of the sealing member for scroll compressors concerning a 1st embodiment. It is a figure which shows sectional drawing in the dotted line A of FIG. It is a figure which shows the example of arrangement | positioning of a gate. It is a figure which shows the relationship between a gas vent groove position, a product filling rate, and a resin flow rate. It is a top view of the shaping | molding apparatus of the sealing member for scroll compressors which concerns on 2nd Embodiment. It is a figure which shows the top view and principal part sectional drawing of the shaping | molding apparatus of the sealing member for scroll type compressors concerning 3rd Embodiment. It is a figure which shows the perspective view of the cavity of the shaping | molding apparatus of the sealing member for scroll type compressors which concerns on 4th Embodiment. It is a figure which shows the modification of 4th Embodiment.

  FIG. 1 shows a compression mechanism of a scroll compressor to which a seal member according to an embodiment of the present invention is applied. The compression mechanism is composed of a pair of fixed scroll 14 and orbiting scroll 15. The fixed scroll 14 includes a fixed end plate 14A and a fixed spiral wrap 14B standing on the fixed end plate 14A. The orbiting scroll 15 includes an orbiting end plate 15A and an orbiting spiral wrap 15B provided upright on the end plate 15A.

  The fixed scroll 14 and the orbiting scroll 15 are provided with step portions 14D and 14E and 15D and 15E, respectively, at predetermined positions along the spiral direction of the tooth tip surfaces and the tooth bottom surfaces of the spiral wraps 14B and 15B. With this stepped portion 14D, 14E and 15D, 15E as the boundary, the tooth tip surface of the wrap has a high tooth tip surface on the outer peripheral side in the direction of the turning axis, and the tooth tip surface on the inner peripheral side is low. Further, in the tooth bottom surface of the wrap, the tooth bottom surface on the outer peripheral side is low and the tooth bottom surface on the inner peripheral side is high in the turning axis direction. As a result, each of the spiral wraps 14B and 15B has a wrap height on the outer peripheral side higher than a wrap height on the inner peripheral side.

  The fixed scroll 14 and the orbiting scroll 15 are separated from each other by the orbiting radius, and the phases of the spiral wraps 14B and 15B are shifted by 180 degrees to mesh with each other. It is assembled so as to have a slight clearance (several tens to several hundreds of microns) in the lap height direction at room temperature between the bottom surface. Thereby, between the scrolls 14 and 15, a plurality of pairs of compression chambers limited by the end plates 14A and 15A and the spiral wraps 14B and 15B are formed symmetrically with respect to the scroll center. The orbiting scroll 15 is configured to smoothly turn around the fixed scroll 14.

  In the compression chamber, the height in the swirl axis direction is higher than the height on the inner peripheral side on the outer peripheral side of each spiral wrap 14B, 15B, so that both the circumferential direction and the height direction of each spiral wrap 14B, 15B are obtained. A three-dimensional compressible scroll type compression mechanism capable of compressing gas is constructed. Seal members 17 and 18 (to be described later) for sealing the tip gap formed between the tooth bottom surfaces of the other scrolls on the tooth tip surfaces of the spiral wraps 14B and 15B of the fixed scroll 14 and the orbiting scroll 15, respectively. The seal grooves 14F, 14G and 15F, 15G provided on the tooth tip surface are fitted and incorporated.

  As shown in FIG. 1, the seal members 17 and 18 incorporated in the tooth tip surfaces of the fixed spiral wrap 14 </ b> B and the swirl spiral wrap 15 </ b> B are formed on the tooth tip surfaces of the outer circumferential wrap with the stepped portions 14 </ b> D and 15 </ b> D as a boundary. The seal members 17A and 18A incorporated in the provided seal grooves 14F and 15F are respectively divided into the seal members 17B and 18B incorporated in the seal grooves 14G and 15G provided on the tooth tip surface of the inner peripheral side wrap. It is incorporated so as to be fitted in each of the seal grooves 14F, 14G and 15F, 15G.

Hereinafter, an embodiment of a molding apparatus for a seal member for a scroll compressor according to the present invention will be described with reference to the drawings.
<First Embodiment>
In FIG. 2, the top view of the product part 100 of the shaping | molding apparatus of the sealing member for scroll compressors which concerns on this embodiment is shown. The product unit 100 of the molding apparatus includes a cavity 101 and a gas vent groove 102. FIG. 3 is a sectional view taken along the dotted line A in FIG.

  The cavity 101 is a spiral groove corresponding to the shape of the seal groove of the applied scroll type compression mechanism. For example, the size of a seal member applied to a scroll compressor for a car air conditioner is about 120 mm to 420 mm in length, 1.0 mm to 1.4 mm in width, and about 1.0 mm to 1.4 mm in depth. The cavity 101 includes a first cavity 101 a including a winding start end portion 103 and a second cavity 101 b including a winding end end portion 104. The first cavity 101a and the second cavity 101b are arranged such that the other end 105 and the other end 106 located on the opposite sides of the winding start end and the winding end end face each other.

In the upper part on both sides of the winding start end 103 of the first cavity 101a, the range from 10% to 50%, preferably 10% to 20% of the total length of the first cavity 101a from the winding start end 103 (B ) Is provided with a gas vent groove 102a along the longitudinal direction of the first cavity 101a.
The upper part on both sides of the winding end portion 104 of the second cavity 101b has a range of 10% or more and 50% or less, preferably 10% or more and 20% or less with respect to the entire length of the second cavity 101b from the winding end portion 104 (C ) Is provided with a gas vent groove 102b along the longitudinal direction of the second cavity 101b.
The size of the gas vent groove 102a and the gas vent groove 102b is 0.60% to 1.12% of the product volume, and is appropriately set according to the fluidity of the resin material used. For example, if the product volume is 3.16 mL, size of the gas release groove 102a and the gas release groove 102b is a ^{19.0 × 10 -3 mL~35.3 × 10 -3} mL , respectively.

The apparatus for molding a scroll compressor seal member according to the present embodiment includes a non-product portion including a spool, one or more runners connected to the spool, and a gate.
The gate is in communication with the other end portion 105 side of the first cavity 101a and the other end portion 106 side of the second cavity 101b so that a resin material can be simultaneously injected into the first cavity 101a and the second cavity 101b. FIG. 4 shows an example of gate arrangement. In FIG. 4, a gate 108 is disposed between the other end portion 105 and the other end portion 106 with the injection hole 107 facing each other end portion.

Next, the manufacturing method of the sealing member using the molding apparatus of the sealing member for scroll compressors of the said structure is demonstrated.
As the resin material, polyphenylene sulfide resin (hereinafter referred to as PPS) is used. In order to impart abrasion resistance and strength resistance, carbon fiber and a filler of polytetrafluoroethylene resin (hereinafter referred to as PTFE) are added to the resin material at a predetermined ratio. For example, carbon fiber is added at a rate of 20% by mass and PTFE is added at a rate of 15% by mass with respect to PPS.

Prior to injection, PPS is heated to about 300 ° C. to 350 ° C. to melt.
The melted PPS is injected from the spool through the runner and gate 108 into the first cavity 101a and the second cavity 101b through the injection hole 107. At this time, the injected PPS flows along the longitudinal direction of the first cavity 101a and the second cavity 101b, and is filled in each cavity 101. The filled PPS is cooled and solidified and formed as a seal member. The molded sealing member is released from the molding apparatus. After the mold release, the burr generated in the product portion corresponding to the gas vent groove 102 is processed. The PPS solidified in the non-product part is also integrated with the released seal member. Therefore, the gate is cut and the surface of the gate trace is processed.

Next, the basis for determining the setting range of the gas vent groove 102 will be described.
Using a flow analysis software (manufactured by Autodesk Co., Ltd .: Moldflow), a resin material filling model in the cavity was simulated under the following conditions.
The size of the first cavity and the second cavity was 180 mm in length, 1.9 mm in width, and 1.2 m in depth, respectively. The gas vent groove 102 has a width of 0.5 mm, a depth of 0.05 mm (0.04 mL or less), and a length of 20%, 30%, 50%, and 100% with respect to the total length of each cavity, respectively. It was set to be provided along the longitudinal direction of each cavity from the part and the end of winding end. As a resin material, PPS (made by Idemitsu Kosan Co., Ltd., T524A1) was assumed. The resin temperature at the start of injection was 340 ° C., and the maximum injection pressure was 182 MPa.

FIG. 5 shows the relationship between the gas vent groove position, the filling rate, and the center speed. In the figure, the horizontal axis represents the gas vent groove position, the vertical axis (left) represents the product filling rate (■, x), and the vertical axis (right) represents the center speed (♦) of the resin. According to FIG. 5, when the gas venting groove is 100%, that is, provided over the entire circumference of the cavity, the filling rate becomes about 98%, and a short shot is performed. On the other hand, when the gas vent groove was provided in the range of 20%, 30%, and 50% from the winding start end and the winding end end, the filling rate was almost 100%. In actual molding, not only the cavity but also the gas vent groove is filled with PPS. Since the above-mentioned simulation is the filling rate considering the volume of the gas vent groove, the result of almost 100% of the molding apparatus provided with the gas vent groove at 20%, 30% or 50% is 100% as a product. % Equivalent.
Moreover, according to FIG. 5, the center speed of PPS fell, so that the length of the degassing groove | channel was long.

If the gas vent groove is too short, the gas venting ability is lowered, so that the length of each cavity is required to be about 10%.
From the above results, the gas venting groove has a length of 10% or more and 50% or less, preferably 10% or more and 20% or less with respect to the total length of each cavity, and the final filling position (winding end and winding end) of each cavity. It was confirmed that short shots can be prevented by forming along the longitudinal direction of each cavity from the end.

Second Embodiment
FIG. 6 shows a plan view of a molding apparatus 150 for a scroll compressor seal member according to this embodiment. The molding apparatus 150 includes a cavity 151 and a gas vent groove 152.

  The cavity 151 is a spiral groove corresponding to the shape of the seal groove of the applied scroll type compression mechanism. The cavity 151 includes a first cavity 151 a including a winding start end 153 and a second cavity 151 b including a winding end end 154. The first cavity 151a and the second cavity 151b are arranged such that the other end 155 and the other end 156 located on the opposite sides of the winding start end and the winding end end face each other.

A gas vent groove (gas reservoir) 152a is provided in a predetermined shape on the upper end surface of the winding start end 153 of the first cavity 151a so as to communicate with the first cavity 151a.
A gas vent groove (gas reservoir) 152b is provided in a predetermined shape so as to communicate with the second cavity 151b at the upper end surface of the winding end portion 154 of the second cavity 151b.
The size of the gas vent groove 152a and the gas vent groove 152b is 0.60% to 1.12% of the product volume, and is appropriately set according to the fluidity of the resin material used. In FIG. 6, although the gas vent groove is circular, it is not limited to this.

The scroll compressor molding device according to the present embodiment includes a non-product portion including a spool 160, one or more runners 159 connected to the spool 160, and a gate 158.
The gate 158 has an injection hole 157 communicating with the other end 155 side of the first cavity 151a and the other end 156 side of the second cavity 151b so that a resin material can be simultaneously injected into the first cavity 151a and the second cavity 151b. ing.

  The manufacturing method of the sealing member using the molding apparatus for the scroll-type compressor sealing member having the above configuration is the same as that of the first embodiment.

  As with the first embodiment, a model for filling the resin material into the cavity was simulated for the seal member manufactured using the scroll compressor sealing device molding apparatus having the above-described configuration. Since it is desirable that the gas vent groove 152 has a diameter of 20 mm or less, the diameter is 19.14 mm and the depth is 0.05 mm.

According to the above test, 20.8 × 10 ⁻³ mL of resin flowed into the gas vent groove 152. That is, the filling rate of the resin into the cavity 151 was 100%.

<Third Embodiment>
In FIG. 7, the top view and principal part sectional drawing of the shaping | molding apparatus of the sealing member for scroll type compressors which concern on this embodiment are shown. The molding apparatus 200 includes a product part composed of two cavities, and a non-product part composed of a gate 208 and a runner 211 and a spool 212 connected to the gate 208.

  The cavity 201 is a spiral groove corresponding to the shape of the seal groove of the applied scroll type compression mechanism, and is formed in the fixed mold. The cavity 201 includes a first cavity 201 a including a winding start end portion 203 and a second cavity 201 b including a winding end end portion 204. The first cavity 201a and the second cavity 201b are arranged such that the other end 205 and the other end 206 located on the opposite sides of the winding start end and the winding end end face each other.

The gate 208 is a fan gate having a rectangular injection hole 207. The fan gate is a flat gate that spreads in a fan shape toward the injection hole 207. The thickness of the gate 208 is 100% of the thickness of the molded product. The length of the gate 208 is 5 to 10 times the thickness of the gate.
The injection holes 207 communicate with the respective cavities 201 at the same time so that the resin material can be injected simultaneously on the outer peripheral upper sides of the first cavity 201a on the other end 205 side and the second cavity 201b on the other end 206 side. The fan gate according to the present embodiment is formed by providing a groove in a fixed mold, and a part 209 of the groove bottom surface is inclined so that the thickness becomes thinner toward the injection hole side.
On the other hand, the movable mold is provided with a linear protrusion at a predetermined position along the outer periphery of the cavity 201 so that the notch 210 is provided in the upper surface portion of the fan gate when the mold is released. The convex portion preferably has a shape that facilitates gate cutting, for example, a triangular cross-sectional shape.

  For example, when the depth of the first cavity 201a and the second cavity 201b is 1.2 mm, a fan gate having an injection hole having a length of about 10 mm × thickness of 0.5 mm is connected to the other end 205 side and the other end 206. The groove upper surface is aligned with each cavity 201 on the outer periphery on the side. In the movable mold, triangular convex portions having a length of about 10 mm and a height of about 0.3 mm are linearly formed.

  By adopting the above-described molding apparatus for the scroll-type compressor sealing member, the mass of the resin material cooled and solidified in the non-product portion can be reduced by about 30%.

<Fourth embodiment>
FIG. 8 is a perspective view of the cavity 301 of the molding apparatus for the scroll-type compressor sealing member according to the present embodiment.
The cavity 301 is a spiral groove corresponding to the shape of the seal groove of the applied scroll type compression mechanism. The cavity 301 includes a first cavity 301 a including a winding start end portion 303 and a second cavity 301 b including a winding end end portion 304. The first cavity 301a and the second cavity 301b are arranged such that the other end 305 and the other end 306 located on the opposite sides of the winding start end and the winding end end face each other.

  The end surfaces of the other end 305 of the first cavity 301a and the other end 306 of the second cavity 301b are respectively formed with recesses that are recessed toward the inside of the cavity. When the recess is used as a seal member, the recess is provided at a position corresponding to the center of the end surface in the thickness direction or the non-seal surface side.

When the concave portion is provided in the center in the thickness direction, the cavity 301 is configured by a groove formed in the fixed mold and a groove formed in the movable mold, and the dividing surface of one of the molds and the end surface of the concave portion are formed. The recesses are preferably arranged so as to match. For example, in the case of a cavity with a thickness of 1.2 mm, as shown in FIG. By providing the concave portion in the center in the thickness direction, a seal member that can be used on both the front and back surfaces as a tool surface can be manufactured. By doing in this way, a gate cut surface can be prevented from coming out from a product surface.
When manufacturing a single-sided seal member, the recess is provided on the non-seal surface side.

  The recess is in communication with an injection hole of a gate so that a resin material can be simultaneously injected into each cavity.

  A modification of the present embodiment is shown in FIG. As shown in FIG. 9, the recesses are provided on the outer peripheral side surfaces of the first cavity 301a on the other end 305 side and the second cavity 301b on the other end 306 side.

  The third embodiment and the fourth embodiment may be implemented in combination with the first embodiment or the second embodiment, respectively.

14 fixed scroll 15 orbiting scroll 14A fixed end plate 14B fixed spiral wrap 15A orbiting end plate 15B orbiting spiral wrap 14D, 14E, 15D, 15E stepped portions 14F, 14G, 15F, 15G seal grooves 17A, 17B, 18A, 18B seals Member 100 Product part 101, 151, 201, 301 Cavity 102, 152, 202, 203 Degassing groove 103, 153, 203, 303 Winding start end 104, 154, 204, 304 Winding end 105, 106, 155, 156, 205, 206, 305, 306 Other end 107, 157, 207 Injection hole 108, 158, 208 Gate 150, 200 Molding device 159, 211 Runner 160, 212 Spool 209 Inclined surface 210 Notch 313 Recess

Claims (17)

A molding apparatus for injection-molding a seal member for a scroll-type compressor that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber,
The molding apparatus is
A spiral cavity corresponding to the shape of the seal groove, which is composed of a first cavity including a winding start end and a second cavity including a winding end end, and is arranged so that the other end of each cavity faces each other; ,
A first gas vent groove provided in a range of 10% to 50% of the total length of the first cavity from the winding start end on both longitudinal sides of the first cavity;
A second vent groove provided in a range of 10% or more and 50% or less with respect to the total length of the second cavity from the winding end end on both sides in the longitudinal direction of the second cavity;
A gate communicated so that a resin material can be simultaneously injected into each cavity from the other end side of each cavity;
An apparatus for forming a seal member for a scroll compressor. The first gas vent groove is provided in a range of 10% or more and 20% or less with respect to the total length of the first cavity from the winding start end.
2. The molding of the scroll-type compressor seal member according to claim 1, wherein the second gas vent groove is provided in a range of 10% to 20% with respect to a total length of the second cavity from the end of winding. apparatus. A molding apparatus for injection-molding a seal member for a scroll-type compressor that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber,
The molding apparatus is
A spiral cavity corresponding to the shape of the seal groove, which is composed of a first cavity including a winding start end and a second cavity including a winding end end, and is arranged so that the other end of each cavity faces each other; ,
A first gas vent groove provided in communication with the first cavity at the winding start end;
A second gas vent groove provided in communication with the second cavity at the winding end end;
A gate communicated so that a resin material can be simultaneously injected into each cavity from the other end side of each cavity;
An apparatus for forming a seal member for a scroll compressor. The molding apparatus includes a fixed mold and a movable mold,
The fixed mold is
The cavity;
A rectangular injection hole communicates with each cavity at the upper outer periphery of the other end of each of the cavities so that a resin material can be injected simultaneously, and a part of the bottom surface is inclined so as to become thinner toward the injection hole. A fan gate,
With
The movable mold is
The seal member for a scroll compressor according to any one of claims 1 to 3, further comprising a convex portion formed linearly along an outer periphery of the cavity so that a notch portion is provided on an upper surface of the fan gate. Molding equipment.   4. A recess is formed in the end face or outer peripheral side of the other end of each of the cavities, and an injection hole of a gate communicates with the recess so that a resin material can be simultaneously injected into each of the cavities. The molding apparatus of the sealing member for scroll type compressors in any one. A molding apparatus for injection-molding a seal member for a scroll-type compressor that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber,
The molding apparatus includes a fixed mold and a movable mold,
The fixed mold is
A spiral cavity corresponding to the shape of the seal groove, which is composed of a first cavity including a winding start end and a second cavity including a winding end end, and is arranged so that the other end of each cavity faces each other; ,
A rectangular injection hole is communicated with each cavity at the upper outer periphery of the other end of each cavity so that the resin material can be injected simultaneously, and a part of the bottom surface is inclined so as to become thinner toward the injection hole side. With a fan gate,
With
The movable mold is
An apparatus for forming a scroll-type compressor seal member comprising a convex portion formed linearly along the outer periphery of the cavity so that a notch is provided on the upper surface of the fan gate. A molding apparatus for injection-molding a seal member for a scroll-type compressor that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber,
A spiral cavity corresponding to the shape of the seal groove, which is composed of a first cavity including a winding start end and a second cavity including a winding end end, and is arranged so that the other end of each cavity faces each other, Prepared,
There is a recess formed in the end face or outer peripheral side surface of the other end of each cavity, and a seal member for a scroll compressor in which a gate injection hole communicates with the recess so that a resin material can be simultaneously injected into each cavity. Molding equipment.   The molding of the seal member for a scroll compressor according to claim 5 or 7, wherein the recess is formed at a position corresponding to a center in a thickness direction of the seal member or a non-seal surface side of the seal member. apparatus. A method for manufacturing a scroll-type compressor seal member that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber,
In the molding equipment,
As a spiral cavity corresponding to the shape of the seal groove, a first cavity including a winding start end and a second cavity including a winding end end are provided such that the other ends of the cavities face each other.
The first gas vent groove is provided on both sides in the longitudinal direction of the first cavity in a range from 10% to 50% with respect to the total length of the first cavity from the winding start end,
Second gas vent grooves are provided on both sides in the longitudinal direction of the second cavity in a range of 10% to 50% with respect to the total length of the second cavity from the winding end.
The gate is communicated to the respective cavities from the other end side of each of the cavities so that the resin material can be injected simultaneously,
A method for manufacturing a seal member for a scroll compressor, wherein the resin material melted from an injection hole of the gate is injected into the cavities to form the seal member. The first gas vent groove is provided on both sides in the longitudinal direction of the first cavity in a range of 10% or more and 20% or less with respect to the total length of the first cavity from the winding start end.
10. The scroll mold according to claim 9, wherein the second gas vent groove is provided on both sides in the longitudinal direction of the second cavity in a range of 10% to 20% with respect to the total length of the second cavity from the winding end. A manufacturing method of a sealing member for a compressor. A method for manufacturing a scroll-type compressor seal member that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber,
In the molding equipment,
As a spiral cavity corresponding to the shape of the seal groove, a first cavity including a winding start end and a second cavity including a winding end end are provided such that the other ends of the cavities face each other.
A first gas vent groove is provided at the winding start end in communication with the first cavity;
A second gas vent groove is provided at the end of winding to communicate with the second cavity;
The gate is communicated to the respective cavities from the other end side of each of the cavities so that the resin material can be injected simultaneously,
A method for manufacturing a seal member for a scroll compressor, wherein the resin material melted from an injection hole of the gate is injected into the cavities to form the seal member. In the fixed mold of the molding apparatus provided with a fixed mold and a movable mold,
Providing the cavity,
A fan gate having a rectangular injection hole and having a part of the bottom surface inclined so as to become thinner toward the injection hole side, and resin material is simultaneously applied to the respective cavities from the upper outer periphery of the other end of each of the cavities. Provided for injection,
In the movable mold,
The manufacture of a scroll-type compressor seal member according to any one of claims 9 to 11, wherein a linear protrusion is provided along the outer periphery of the cavity so that a notch is formed on the upper surface of the fan gate. Method. Forming a recess in the end surface or outer peripheral side surface on the other end side of each cavity,
The method for producing a scroll-type compressor seal member according to any one of claims 9 to 11, wherein a gate injection hole is provided in the recess so that a resin material can be simultaneously injected into each cavity. A method for manufacturing a scroll-type compressor seal member that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber,
In the fixed mold of the molding apparatus having a fixed mold and a movable mold,
As a spiral cavity corresponding to the shape of the seal groove, a first cavity including a winding start end and a second cavity including a winding end end are provided such that the other ends of the cavities face each other.
A fan gate having a rectangular injection hole and having a part of the bottom surface inclined so as to become thinner toward the injection hole side, and resin material is simultaneously applied to the respective cavities from the upper outer periphery of the other end of each of the cavities. Provided for injection,
In the movable mold,
A linear protrusion is provided along the outer periphery of the cavity so that a notch is provided on the upper surface of the fan gate,
A method for producing a seal member for a scroll compressor, wherein the resin material melted from the injection hole is injected into the cavities to form the seal member. A method for manufacturing a scroll-type compressor seal member that is incorporated in a seal groove provided on a front end surface of a scroll spiral wrap and seals a compression chamber,
In the molding equipment,
As a spiral cavity corresponding to the shape of the seal groove, a first cavity including a winding start end and a second cavity including a winding end end are provided such that the other ends of the cavities face each other.
Forming a recess in the end surface or outer peripheral side surface on the other end side of each cavity,
In the recess,
A gate injection hole is provided in each cavity so that resin material can be injected simultaneously,
A method for producing a seal member for a scroll compressor, wherein the resin material melted from the injection hole is injected into the cavities to form the seal member.   The method for manufacturing a seal member for a scroll compressor according to claim 13 or 15, wherein the recess is formed at a center in the thickness direction of the seal member or at a position corresponding to a non-seal surface side of the seal member. . A seal member for a scroll compressor manufactured by the manufacturing method according to claim 15 or 16 .

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