JP4251068B2 - Mold for in-mold coating molding and in-mold coating molding method - Google Patents

Description

  The present invention relates to a mold for in-mold coating molding and an in-mold coating molding method for producing a resin molded product having a coating film on the surface of a substrate body such as an automobile part.

  Conventionally, an in-mold coating molding method in which a resin molded product having a coating film on the surface of a substrate is molded in a cavity has been studied. In this in-mold coating molding method, a coating material is injected into the cavity to mold a coating film on the surface of the substrate. Since the fluidity of the paint is high, in order to suppress paint leakage to the parting line surface (PL surface) which is a mold split surface, the PL surface is configured to have high sealing performance.

On the other hand, it is known that a mold for injection molding various molded products is provided with an air discharge hole (air vent) for discharging the air in the cavity so that the cavity is easily filled with resin. Also, a mold in which an air compressor is connected to an air discharge hole is known (see Patent Document 1). The mold of Patent Document 1 is configured to allow compressed air of an air compressor to flow through the air discharge hole. Yes. And it is comprised so that the dirt of an air exhaust hole may be removed with the compressed air.
JP-A-11-19977

  Since the sealing property of the conventional mold for in-mold coating molding is enhanced, it is necessary to provide an air discharge hole in the cavity in order to smoothly fill the cavity with the paint. However, when an air discharge hole is provided in the conventional mold for in-mold coating molding, since the fluidity of the paint is high, the paint easily flows into the air discharge hole. For this reason, there is a problem that the air discharge hole is easily blocked by the paint, and the function of the air discharge hole gradually decreases every time molding is repeated. Moreover, since the coating material which flowed into the air discharge hole is cured as the coating film is molded, there is a problem that it is difficult to remove the coating material with the compressed air described in Patent Document 1.

  The present invention has been made paying attention to the problems existing in the prior art as described above. An object of the present invention is to provide an in-mold coating molding die and an in-mold coating molding method that can easily exhibit the function of air discharge holes continuously.

  In order to achieve the above object, an invention according to claim 1 is an in-mold coating molding die for molding a resin molded product having a coating film on the surface of a substrate body. A substrate having a moving mold and a second moving mold, and a base material in which a tab portion is connected to a base material body in a first cavity formed by the fixed mold and the first moving mold, are integrally molded, and The second cavity is configured to be filled with paint in a state where the base material is disposed in a second cavity formed by a fixed mold and the second movable mold, A pressing member for pressing the tab portion is provided so as to protrude from the cavity surface of the fixed mold, and an air discharge hole for discharging air in the second cavity is formed in the cavity surface of the second moving mold. The gist is that it is provided facing the pressing member. That.

  According to this configuration, since the air discharge hole is closed by pressing the tab portion by the pressing member, it is possible to suppress the paint from flowing into the air discharge hole. As a result, the air discharge hole is prevented from being blocked by the paint, and the function of the air discharge hole is continuously exhibited.

  According to a second aspect of the present invention, in the first aspect of the present invention, the cavity surface of the first moving mold is provided with an annular rib forming groove for projecting an annular rib on the surface of the tab portion. The rib forming groove is provided at a position facing the pressing member.

  According to this configuration, the annular rib is pressed by the pressing member, and the space between the air discharge hole and the second cavity is firmly sealed by the annular rib. Therefore, the inflow of the paint into the air discharge hole is further suppressed, and the function of the air discharge hole is continuously exhibited.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the cavity surface of the second moving mold is provided with an annular seal groove surrounding the periphery of the air discharge hole. This is the gist.

  According to this configuration, the tab portion is compressed and deformed, and the tab portion is press-fitted into the seal groove, thereby improving the sealing performance around the air discharge hole. Therefore, the inflow of the paint into the air discharge hole is further suppressed, and the function of the air discharge hole is continuously exhibited.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a peripheral ridge extending along a parting line is provided on the cavity surface of the second moving mold. The tip of the peripheral protrusion when the second moving mold is clamped to the fixed mold is the first moving mold when the first moving mold is clamped to the fixed mold. The gist is that it protrudes toward the fixed mold side from the cavity surface of the mold.

  According to this structure, the front-end | tip of a peripheral protrusion is press-fit so that the peripheral part of a base material may be crushed, and the sealing performance of the peripheral part of a 2nd cavity is improved. Therefore, it is possible to prevent the paint from leaking from the peripheral portion of the second cavity to the parting line surface.

  The gist of the invention according to claim 5 is that, in the invention according to any one of claims 1 to 4, the first cavity forms the tab portion into a flat plate shape. According to this configuration, since the tab portion is molded into a shape that covers the air discharge hole and is formed into a shape that is easily elastically deformed, the function of closing the air discharge hole is improved, Inflow of paint is further suppressed.

  The invention according to claim 6 is an in-mold coating molding method for molding a resin molded product having a coating film on the surface of a substrate body, wherein the first cavity is formed by a stationary mold and a first moving mold. In the base material molding step of integrally molding the base material with the tab portion connected to the base material body, and injecting the paint into the second cavity formed by the fixed mold and the second moving mold, and molding the coating film A coating film forming step, wherein the coating film forming step discharges the air in the second cavity through an air discharge hole, and the air discharge hole is closed by the tab portion after the air discharge step. Including a closing stage.

  According to this method, the inside of the second cavity can be in a reduced pressure state at the air discharge stage, so that the paint can be quickly flowed into the gap using the suction force by the reduced pressure. Moreover, since it can suppress that a coating material flows in into an air discharge hole in the obstruction | occlusion stage, the function of an air discharge hole can be exhibited continuously.

The gist of the invention according to claim 7 is that, in the invention according to claim 6, in the coating film forming step, injection of the paint is started after the closing stage.
According to this method, since the air discharge hole is closed at the start of paint injection, there is no possibility that the paint will flow into the air discharge hole. For this reason, it is very easy to continuously exhibit the function of the air discharge hole.

  The gist of the invention according to claim 8 is the invention according to claim 6, wherein, in the coating film forming step, the blocking step is performed after a predetermined time has elapsed after the injection of the paint is started.

  According to this method, even after the injection of the paint is started, it is in the air discharge stage, so that the paint can be filled more rapidly by the suction force. The predetermined time is set to an arbitrary time before the paint injected into the second cavity reaches the air discharge hole.

  The invention according to claim 9 is the invention according to any one of claims 6 to 8, wherein, in the closing step, the tab portion closes the air discharge hole in a state where the pressure in the air discharge hole is reduced. The gist of the configuration is as follows.

  According to this method, the tab portion is firmly adhered to the air discharge hole by using the suction force due to the reduced pressure, and the inflow of the paint into the air discharge hole is further suppressed.

  According to the present invention, the function of the air discharge hole can be continuously exhibited.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments in which the present invention is embodied in an in-mold coating mold for manufacturing an automobile door pillar garnish will be described below in detail with reference to the drawings.
As shown in FIG. 1, a door pillar garnish 11 as a resin molded product is attached to a door pillar portion 12 a of an automobile door 12. The door pillar garnish 11 (hereinafter referred to as garnish 11) has a thin plate shape and covers the outer surface of the door pillar portion 12a. As shown in FIG. 2, the garnish 11 includes a plate-shaped base body 13 and a coating film 14 formed in a thin layer on the surface of the base body 13. It is attached to the outside of the vehicle as a surface. In the drawing, the thickness of the coating film 14 is exaggerated.

  The base body 13 and the coating film 14 are formed from a resin material such as a thermoplastic resin or a curable resin. Examples of the thermoplastic resin include acrylic resin, polycarbonate resin, and urethane resin, and examples of the curable resin include acrylic resin and urethane resin. Since the base body 13 can be easily molded, it is preferably molded from a thermoplastic resin. The coating film 14 is preferably formed from a liquid thermosetting paint because of its excellent fluidity.

  The garnish 11 is molded using an in-mold coating mold. As shown in FIG. 2, an ellipsoidal tab portion 15 is connected to one end of the base body 13 after demolding (the upper end side of the door pillar portion 12 a), and the base body 13 and the tab portion 15 are connected to each other. The garnish 11 is obtained by separating the tab portion 15 at the connecting portion. Hereinafter, the base member 16 connected to the base body 13 is referred to as a base member 16.

  As shown in FIGS. 3 and 4, the in-mold coating molding die 17 includes a fixed die 18, a first moving die 19, and a second moving die 20. The base material 16 is molded in a first cavity 21 formed by a fixed mold 18 and a first moving mold 19. The coating film 14 is molded in a state in which the base material 16 is disposed in the second cavity 22 formed by the fixed mold 18 and the second moving mold 20.

  As shown in FIG. 3, the first cavity 21 includes a body cavity 21a for molding the base body 13 and a tab cavity 21b for molding the tab portion 15, and a tab cavity 21b is provided at one end of the body cavity 21a. It is communicated. A rib forming groove 23 having a triangular cross section is annularly formed in the cavity surface of the first moving mold 19 forming the tab cavity 21b. The rib forming groove 23 projects a seal rib 24 as an annular rib on the surface of the tab portion 15.

  On the other hand, the fixed mold 18 is provided with a cylindrical pressing pin 25 as a pressing member, and the rib forming groove 23 is provided so as to face the front end surface of the pressing pin 25. The pressing pin 25 is configured such that a tip surface thereof constitutes a cavity surface of the fixed mold 18 and protrudes from a cavity surface of the fixed mold 18. Further, the pressing pin 25 is configured to move in the mold clamping and mold opening direction of the first moving mold 19.

  As shown in FIG. 4, after the base material 16 is molded, the first movable mold 19 and the second movable mold 20 are exchanged, so that the fixed mold 18 and the second movable mold 20 are exchanged. The second cavity 22 is formed. Note that the base material 16 is inserted into the second cavity 22 in a state of being in close contact with the cavity surface of the fixed mold 18. The second cavity 22 includes a coating film forming cavity 22a and an exhaust cavity 22b.

  The coating film forming cavity 22 a is a cavity for forming the coating film 14 on the surface of the base body 13 inserted in the second cavity 22. The exhaust cavity 22b is a cavity provided for discharging the air in the coating film forming cavity 22a using the tab portion 15 inserted in the second cavity 22. In the second cavity 22, the gap 26 between the second moving mold 20 side (the surface of the substrate 16) of the substrate body 13 and the cavity surface of the second moving mold 20 is used. A coating film 14 is formed on the surface.

  On the peripheral edge of the cavity surface of the second moving mold 20, a peripheral protrusion 27 having a triangular cross section is provided so as to extend along the parting line. The front edge of the peripheral protrusion 27 is disposed at a position closer to the fixed mold 18 than the corresponding cavity surface of the first moving mold 19. That is, the tip of the peripheral protrusion 27 when the second moving mold 20 is clamped to the fixed mold 18 is the first moving mold when the first moving mold 19 is clamped to the fixed mold 18. It protrudes from the cavity surface of the mold 19 toward the fixed mold 18. And it press-fits so that the peripheral part of the base material 16 may be crushed with the clamping of the fixed metal mold | die 18 and the 2nd movement metal mold | die 20. FIG. At this time, the peripheral edge of the second cavity 22 is press-fitted into the base material 16 to ensure the sealing performance of the peripheral edge of the second cavity 22, that is, the sealing performance of the second cavity 22 with respect to the parting line surface that is a mold split surface. In addition, the liquid does not flow out to the parting line surface.

  The front end surface of the pressing pin 25 has two types of states: an embedded state in which it is disposed (embedded) flush with the cavity surface of the fixed mold 18 forming the exhaust cavity 22b, and a protruding state that protrudes from the cavity surface. It is comprised so that it may take. The base end portion of the pressing pin 25 is connected to a pressure device (not shown). This pressurizing device presses the pressing pin 25 in a direction in which the tip end portion of the pressing pin 25 protrudes from the exhaust cavity 22b by hydraulic pressure or pneumatic pressure. Further, the front end surface of the pressing pin 25 has a smooth surface, and is flush with the cavity surface of the fixed mold 18 forming the tab cavity 21b when the base material 16 shown in FIG. 3 is molded, and the tab cavity 21b. Part of.

  As shown in FIG. 4, the second moving mold 20 is provided with an air discharge hole 28 for discharging the air in the gap 26. The air discharge hole 28 is provided so as to open to the cavity surface of the second moving mold 20 that forms the exhaust cavity 22 b and to face the tip surface of the pressing pin 25. The opening 29 of the air discharge hole 28 is disposed so as to be located at the center of the tab portion 15. Further, the front end surface of the pressing pin 25 is formed so as to have a larger diameter than the opening 29 of the air discharge hole 28, and is positioned at the center of the tab portion 15. Then, when the pressing pin 25 is in the protruding state as shown in FIG. 5, the tab portion 15 is pressed toward the second moving mold 20 by the tip surface of the pressing pin 25, and the air discharge hole 28 is opened by the tab portion 15. The portion 29 is closed. At this time, the seal rib 24 is pressed so as to surround the opening 29 of the air discharge hole 28. The air discharge hole 28 is provided with a vacuum pump (not shown) as exhaust means, and the air in the gap 26 is forcibly exhausted by the operation of the vacuum pump.

  The center portion of the tab portion 15 is formed to have a predetermined thickness so that the tab portion 15 is brought into close contact with the opening portion 29 of the air discharge hole 28 by using elastic deformation and sufficiently functions to close the air discharge hole 28. be able to. As shown in FIG. 3, in the tab cavity 21b, the thickness T of the portion facing the air discharge hole 28 is preferably 0.5 to 5 mm, more preferably 1.0 to 2.0 mm. If the thickness is less than 0.5 mm, the strength of the tab portion 15 is difficult to maintain, and the function of closing the opening 29 may not be sufficiently exhibited. On the other hand, if it exceeds 5 mm, the tab portion 15 is less likely to be elastically deformed, the tab portion 15 is less likely to adhere to the periphery of the opening 29 of the air discharge hole 28, and the function of closing the opening 29 may not be sufficiently exhibited. There is.

Next, the in-mold coating forming method of the garnish 11 using the in-mold coating molding die 17 will be described in detail.
The in-mold coating molding method in the present embodiment includes a base material molding process and a coating film molding process. The base material forming step is a step of forming the base material 16 by the first cavity 21 formed from the fixed mold 18 and the first moving mold 19. In the coating film forming process, the first moving mold 19 is replaced with the second moving mold 20, and the surface of the substrate 16 is coated by the second cavity 22 formed from the fixed mold 18 and the second moving mold 20. This is a step of forming the film 14.

  As shown in FIGS. 3 and 7, in the base material molding step, first, the first cavity 21 is formed by clamping the fixed mold 18 and the first moving mold 19 (step S100). Next, after the molten resin is filled into the first cavity 21 from an injection gate (not shown), the molten resin is solidified to form the base material 16 (S101). Next, the stationary mold 18 and the first moving mold 19 are opened (S102).

  As shown in FIGS. 4 and 7, in the coating film forming step, first, the second cavity 22 is formed by clamping the fixed mold 18 and the second moving mold 20 (S103). Next, the vacuum pump is operated to perform an air discharge stage in which the air in the second cavity 22 is discharged from the air discharge hole 28 (S104). Subsequent to the air discharging step, as shown in FIGS. 5 and 7, the pressing pin 25 is protruded to press the tab portion 15 and the air discharging hole 28 is closed by the tab portion 15 (S105). . At this time, a seal rib 24 projects from the tab portion 15. When the tab portion 15 is pressed by the pressing pin 25, the seal rib 24 is pressed around the opening 29 of the air discharge hole 28. The seal rib 24 is firmly adhered to the periphery of the opening 29 while being compressed and deformed by the pressing force of the pressing pin 25. As a result, the sealing performance around the opening 29 of the air discharge hole 28 is improved. At this time, since the peripheral protrusion 27 is press-fitted into the peripheral portion of the base material 16, the sealing performance of the second cavity 22 is improved. As a result, the degree of vacuum inside the gap 26 is easily increased.

  After the closing step of S105, injection of paint into the gap 26 from an injection gate (not shown) is started, so that the gap 26 is filled and cured as shown in FIGS. Coating film forming for forming the coating film 14 on the surface is performed (S106). At this time, since the gap 26 is in a pressure-reduced state with respect to the injection gate, the paint is quickly filled in the gap 26 using the suction force by the pressure reduction. At this time, since the opening 29 of the air discharge hole 28 is closed by the tab portion 15, the inflow of the paint into the air discharge hole 28 is suppressed. Subsequently, the stationary mold 18 and the second moving mold 20 are opened, and the garnish 11 to which the tab portion 15 is connected is removed (S107). Finally, the garnish 11 is obtained by removing the tab portion that separates the tab portion 15 from the base body 13 (S108).

The effects exhibited by this embodiment will be described below.
In the in-mold coating molding die 17 in the present embodiment, the stationary die 18 is provided with a pressing pin 25, and the pressing pin 25 is configured to protrude from the inner surface of the exhaust cavity 22b. An opening 29 is provided on the inner surface of the exhaust cavity 22 b of the second moving mold 20 so as to face the pressing pin 25. When configured in this manner, the opening 29 is closed by the tab 15 when the tab 15 is pressed by the pressing pin 25. And it can suppress that a coating material flows into the air discharge hole 28 from the opening part 29. FIG. Therefore, since it can suppress that the air exhaust hole 28 is obstruct | occluded with the hardened coating material, the function of the air exhaust hole 28 can be exhibited continuously.

  In the mold for in-mold coating molding 17 in the present embodiment, a rib forming groove 23 is provided in an annular shape on the inner surface of the tab cavity 21 b in the first moving mold 19, and the rib forming groove 23 is a pressing pin 25. It is provided in the opposite position. When configured in this manner, the rib ribs 23 project the seal rib 24 on the tab portion 15, and when the tab portion 15 is pressed by the pressing pin 25, the seal rib 24 is pressed around the opening 29. Is done. The periphery of the opening 29 is firmly sealed by the compression deformation of the seal rib 24. Therefore, the inflow of the paint from the opening 29 to the air discharge hole 28 is further suppressed, and the function of the air discharge hole 28 can be continuously exhibited.

  In the in-mold coating molding die 17 according to the present embodiment, the peripheral protrusion 27 extends along the parting line on the cavity surface of the second moving mold 20. The tip of the peripheral protrusion 27 when the second moving mold 20 is clamped to the fixed mold 18 is the first moving mold 19 when the first moving mold 19 is clamped to the fixed mold 18. It protrudes to the fixed mold 18 side from the cavity surface. When comprised in this way, the front-end | tip of the peripheral protrusion 27 is press-fit in the peripheral part of the base material 16, and the sealing property of the peripheral part of the 2nd cavity 22 is ensured easily, and high sealing property can be exhibited. . Therefore, the paint can be prevented from leaking from the peripheral edge of the second cavity 22.

  In the in-mold coating molding die 17 in the present embodiment, the tab portion 15 is molded into a flat plate shape by the first cavity 21. When configured in this manner, the function of closing the air discharge hole 28 is improved, and the inflow of the paint into the air discharge hole 28 is further suppressed.

  In the in-mold coating mold 17 according to this embodiment, the air discharge hole 28 is connected to a vacuum pump that forcibly exhausts the air in the second cavity 22. When configured in this manner, the inside of the second cavity 22 can be in a reduced pressure state, so that the paint can quickly flow into the gap 26 using the suction force by the reduced pressure.

  Moreover, the oxygen concentration in the second cavity 22 can be reduced by reducing the pressure in the second cavity 22. Therefore, when an anaerobic paint whose curing reaction is inhibited by oxygen in the air is used, the influence of oxygen on the curing reaction can be suppressed. Therefore, the film forming performance of the anaerobic paint can be sufficiently exhibited, and the garnish 11 having excellent appearance (glossiness and smoothness) can be obtained. Furthermore, by providing the peripheral ridge 27 in the second cavity 22, the hermeticity in the second cavity 22 is increased, so that the oxygen concentration in the second cavity 22 can be further reduced.

  In the in-mold coating molding method in the present embodiment, the above-described in-mold coating molding die 17 is used, and includes a base material molding process and a coating film molding process. Furthermore, the coating film forming process includes an air discharge stage and a clogging stage. In this case, since the paint can be prevented from flowing into the air discharge hole 28 from the opening 29 by the closing step, the function of the air discharge hole 28 can be continuously exhibited. Further, since the inside of the second cavity 22 can be in a reduced pressure state by the air discharge stage, the paint can be promptly flowed into the gap 26 using the suction force by the reduced pressure.

  In addition, the oxygen concentration in the second cavity 22 can be reduced by the air discharge step. Therefore, when an anaerobic paint whose reaction is inhibited by oxygen in the air, the film formation performance of the anaerobic paint can be sufficiently exhibited.

In the in-mold coating molding method according to the present embodiment, the injection of the paint into the second cavity 22 is started after the closing stage in the coating film molding process. In this case, since the opening 29 is closed at the start of the injection of the paint, it is possible to further suppress the paint from flowing into the air discharge hole 28 from the opening 29.
(Modification)
The embodiment may be modified as follows.

  The inner surface of the tab cavity 21 b may be formed in a flat shape without providing the rib forming groove 23 in the first moving mold 19. And it is good also considering the surface of the tab part 15 as planar as shown in FIG. In this case, it is preferable that the sealing groove 30 having a triangular cross section is provided in an annular shape around the opening 29 in the second moving mold 20. In this case, as shown in FIG. 9, when the tab portion 15 is pressed by the pressing pin 25, the tab portion 15 is compressed and deformed by the pressing force of the pressing pin 25 and the tab portion 15 is press-fitted into the seal groove 30. . Therefore, the sealing performance around the opening 29 is improved, and the function of the air discharge hole 28 can be continuously exhibited.

-Although the rib formation groove | channel 23, the peripheral protrusion 27, and the said sealing groove | channel 30 in the said embodiment are formed in the cross-sectional triangle shape, other shapes, such as a cross-sectional U-shape and a cross-sectional U-shape, may be sufficient.
In the coating film forming process, the injection of paint is started after the closing stage. In addition to this, in the coating film forming process, the blocking step may be performed after a predetermined time has elapsed since the start of the injection of the paint. In this case, even after the start of the injection of the paint, since it is in the air discharge stage, the paint can be filled more rapidly by the suction force. Here, the fixed time is an arbitrary time from the start of the injection of the paint to before the paint reaches the opening 29.

-In the said embodiment, the vacuum pump is applied as an exhaust means. In addition, an aspirator or the like may be applied as an exhaust unit.
In the embodiment, the tab portion 15 is connected to the upper end of the base body 13 (based on the door pillar portion 12a), but may be configured to be connected to the lower end or the side end. In addition, the tab cavity 21b and the tab portion 15 of the above embodiment have an elliptical plate shape, but may be changed to other shapes such as a square plate shape.

  In the mold for in-mold coating molding and the in-mold coating molding method of the embodiment, the present invention is applied to the garnish 11 as a resin molded product. As other resin molded products, the present invention may be applied to various exterior products and interior products of automobiles.

The side view of the door with which the door pillar garnish of this embodiment was mounted | worn. The principal part perspective view of the garnish with which the tab part was connected. The principal part sectional view showing a fixed metallic mold and the 1st move metallic mold. The principal part sectional view showing a fixed metallic mold, the 2nd move metallic mold, and an air discharge stage. The principal part sectional drawing which shows a stationary metal mold | die and a 2nd movement metal mold | die, and a closure stage. The principal part sectional drawing which shows the state with which the 2nd cavity was filled with the coating material. The flowchart which shows the in-mold coating molding method. The principal part sectional drawing which shows another example of a 1st movement metal mold | die. The principal part sectional drawing which shows the effect | action of another example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Door pillar garnish as a resin molded product, 13 ... Base material main body, 14 ... Coating film, 15 ... Tab part, 16 ... Base material, 17 ... Mold for in-mold coating molding, 18 ... Fixed mold, 19 ... No. DESCRIPTION OF SYMBOLS 1 moving mold, 20 ... 2nd moving mold, 21 ... 1st cavity, 22 ... 2nd cavity, 23 ... Rib formation groove, 24 ... Seal rib as annular rib, 25 ... Pressing pin as pressing member, 27 ... Peripheral protrusion 28, air exhaust hole, 30 ... seal groove.

Claims (9)

A mold for in-mold coating molding that molds a resin molded product having a coating film on the surface of the substrate body,
A fixed mold, a first moving mold and a second moving mold;
A base material in which a tab portion is connected to a base material body is integrally formed in a first cavity formed by the fixed mold and the first moving mold,
The second cavity is configured to be filled with paint in a state where the base material is disposed in a second cavity formed by the fixed mold and the second moving mold,
The fixed mold is provided with a pressing member that presses the tab portion so as to protrude from the cavity surface of the fixed mold, and air in the second cavity is supplied to the cavity surface of the second movable mold. A mold for in-mold coating molding, wherein an air discharge hole for discharging is provided to face the pressing member. A rib forming groove for projecting an annular rib on the surface of the tab portion is annularly provided on the cavity surface of the first moving mold, and the rib forming groove is provided at a position facing the pressing member. The mold for in-mold coating molding according to claim 1. The mold for in-mold coating molding according to claim 1 or 2, wherein a seal groove surrounding the periphery of the air discharge hole is annularly provided on a cavity surface of the second moving mold. . A peripheral ridge extending along a parting line is provided on the cavity surface of the second moving mold, and the tip of the peripheral ridge when the second moving mold is clamped to the fixed mold is 4. The method according to claim 1, wherein the first moving mold protrudes closer to the fixed mold than the cavity surface of the first moving mold when the first moving mold is clamped to the fixed mold. The mold for in-mold coating molding as described in any one of Claims. The mold for in-mold coating molding according to any one of claims 1 to 4, wherein the tab portion is formed into a flat plate shape by the first cavity. An in-mold coating molding method for molding a resin molded product having a coating film on the surface of a substrate body,
A base material forming step of integrally forming a base material in which a tab portion is connected to a base material main body in a first cavity formed by a fixed die and a first moving die, and formed by the fixed die and the second moving die. A coating film forming step of forming a coating film by injecting a paint into the second cavity,
The coating film forming step includes an air discharge step of discharging air in the second cavity through an air discharge hole, and a closing step of closing the air discharge hole by the tab portion after the air discharge step. In-mold coating molding method. The in-mold coating molding method according to claim 6, wherein in the coating film forming step, injection of the paint is started after the closing stage. The in-mold coating molding method according to claim 6, wherein, in the coating film forming step, the closing step is performed after a predetermined time has elapsed after the injection of the paint is started. The said tab part is comprised so that an air exhaust hole may be obstruct | occluded in the state which pressure-reduced the inside of an air exhaust hole in the said obstruction | occlusion stage, It is characterized by the above-mentioned. In-mold paint molding method.

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