JP4506014B2 - Molding method and mold apparatus for coated molded product - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
More particularly, the present invention relates to a molding method and a mold apparatus suitable for coating a molded article such as a resin with a coating agent in the mold apparatus. Is.
[0002]
[Prior art]
Conventionally, in a molded article by injection molding or the like, after forming a base material in a mold apparatus, the base material is taken out from the mold apparatus and coated with a coating agent by spraying or the like to form a coating layer.
[0003]
In order to reduce the number of steps, a method called an in-mold coating method is performed in which a molded substrate is coated with a coating agent in a mold apparatus.
As a covering molded product formed by the in-mold coating method, for example, there is a side molding attached to the side surface of a vehicle.
[0004]
Examples of the side molding formed by the in-mold coating method include a shape in which both side portions are curved as shown in FIG. In the side molding 101, a coating layer 104 is formed on a surface 103 as a design surface of the base material 102.
[0005]
The side molding 101 is attached to the vehicle via a double-sided tape that is attached to a part of the back surface 105 that is continuous with the design surface.
[0006]
[Problems to be solved by the invention]
However, the side molding 101 has a problem that the covering layer 104 is easily peeled off at the end portion 106 of the base material 102 because the covering layer 104 is covered only on the surface 103.
[0007]
Further, since the double-sided tape has a weak adhesive force with respect to the resin that is the material of the base material 102, a dedicated primer or the like has been applied to the back surface 105 in order to ensure the adhesive force. Thus, there is also a problem that the cost is increased by applying the primer and the like.
[0008]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a molding method and a mold apparatus for a coated molded product that can make it difficult to peel the coating layer from the base material. is there.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, the invention according to claim 1 is a method for forming a coated molded article in which a base material is coated with a coating material in a cavity of a mold, and the base material is formed in the cavity. A step of injecting material to form a substrate, and slightly opening the mold,And, by moving the slide core provided in the cavity in a direction away from the cavity by a predetermined distance,A step of forming a gap at a position facing the design surface of the substrate and a part of the back surface continuous with the design surface; and injecting the coating agent into the gap; and the design surface of the substrate and the design surface And a step of forming a coating layer covering a part of the back surface continuous with the above.
[0010]
According to this invention, since the coating molded product is formed so as to wrap around the design surface of the base material and a part of the back surface continuous with the design surface, the coating layer is hardly peeled off from the base material. In addition, the coated molded product is attached to the vehicle or the like by attaching one surface of a so-called double-sided tape to the coating layer on the back surface where the coating layer is formed, and attaching the other surface to the vehicle or the like. Since the double-sided tape can provide a good adhesive force to the coating layer, the coated molded product can be attached to a vehicle or the like with a good adhesive force. Accordingly, the step of applying the primer can be eliminated, and the coated molded product can be attached to a vehicle or the like at a low cost.
[0011]
  Claim 2-Claim 4The invention described in 1 includes a mold apparatus that includes a first mold and a second mold, and coats a base material in a cavity formed between both molds to form a coated molded product. The first mold is provided with a recess for forming the cavity, and the second mold is provided with a slide core at a position corresponding to at least both ends in the width direction of the recess. The core has a first position constituting a cavity for molding the base material together with the two molds in a state where the two molds are joined, and a direction away from the cavity by a predetermined distance from the first position. In a state in which the slide core is moved to the second position after the base material is molded in a state where the slide core is disposed at the first position, and the slide core is formed at the first position. Cavity forming surface and base of the slide core The provided clearance injectable route a coating from the coating agent inlet andThe parting surface between the two molds is provided so as to be on the same plane as the cavity forming surface of the slide core located at the first position or on the side opposite to the cavity from the cavity forming surface.This is the gist.
[0012]
When molding a coated molded product using the mold apparatus according to the present invention, first, the first and second molds are joined, and the slide core is located at the first position, and the cavity is placed in the cavity. The substrate material is filled. After the filled material is cured and the base material is molded, the first and second molds are slightly separated and the slide core is disposed at the second position. A gap is formed between the mold, the slide core, and the base material at a position facing the design surface of the base material and a part of the back surface continuous with the design surface. The gap is filled with the coating material from the coating material inlet through the passage. When the filled coating agent is cured, a coating layer that covers the design surface of the substrate and a part of the back surface continuous with the design surface is formed. Accordingly, a coated molded product in which the coating layer is hardly peeled off from the substrate can be molded in the mold.
[0014]
  Also,When the parting surface is provided so as to be located on the same plane as the cavity forming surface, even if the material of the base material enters the parting surface, the burr is not formed on the design surface side of the base material. In addition, when the parting surface is provided on the side opposite to the cavity from the cavity forming surface, the parting surface is not in contact with the cavity when filling the base material into the cavity. The base material does not enter the parting surface. Therefore, generation | occurrence | production of the burr | flash at the time of shape | molding a base material can be reduced.
[0017]
  Claim2Invention described insoIs,in frontThe resin injection port is provided on one of the molds, and the coating agent injection port is provided on the other. The resin injection port and the cavity can communicate with each other when the both molds are joined, and the coating agent. The injection port and the cavity cannot communicate with each other, the coating agent injection port and the cavity can communicate with each other with the molds slightly separated, and the coating agent injection port and the cavity cannot communicate with each other. This is the gist.
[0018]
According to this invention, in a state where both molds are joined, the resin is injected into the cavity from the resin injection port, and this resin does not flow into the coating agent injection port. Further, when both molds are slightly separated, the coating agent is injected into the cavity from the coating agent injection port, and this coating agent does not flow into the resin injection port. Accordingly, the resin can be prevented from flowing into the coating agent inlet, and the coating agent can be prevented from flowing into the resin inlet.
[0019]
  Claim3Invention described insoIs,in frontOne of the molds is provided with the coating agent inlet and a first gate as the path communicating with the coating agent inlet.With the slide core disposed at the first position,The gist of the invention is that it is sealed facing the slide core slightly on the side opposite to the cavity from the cavity forming surface.
[0020]
According to the present invention, the first gate is sealed in a state where both molds are joined. When both molds are slightly separated, the slide core is moved to the second position, whereby the first gate is formed at a position facing the design surface and a part of the back surface communicating with the design surface. Communicated with the gap. Therefore, the resin injected into the cavity from the resin injection port can be prevented from flowing into the coating agent injection port.
[0021]
  Claim4Invention described insoIs,in frontA resin injection port is provided on one of the molds, and the second gate that communicates the resin injection port with the cavity is formed to extend in the same direction as the movement direction of the mold. The gist is that they are formed on both molds so as to cross part of the parting surface.
[0022]
  According to the present invention, since the second gate is communicated with both the molds joined, the resin injected from the resin injection port is filled into the cavity through the second gate. In a state where both molds are slightly separated from each other, the second gate is cut and the resin inlet side portion of the second gate is sealed facing the wall surface of the other mold. Accordingly, the coating agent can be prevented from flowing into the resin injection port.
  According to a fifth aspect of the present invention, in the invention according to any one of the second to fourth aspects, the parting surface between the molds is at least on the side opposite to the cavity from the cavity forming surface of the slide core. The gist is that the distance between the first position and the second position and the distance between the two dies are slightly separated from each other.
According to this invention, the gap formed in the part corresponding to the parting surface when the two molds are slightly separated is sealed facing the slide core, and is continuous with the design surface and the design surface. It does not communicate with a gap formed at a position facing a part of the back surface. Therefore, the generation | occurrence | production of the burr | flash at the time of forming a coating layer can be reduced.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0024]
FIG. 4 shows a schematic cross-sectional view of the side molding 1 as a coated molded product.
As shown in FIG. 4, the long side molding 1 is formed to have a cross-sectional shape with curved sides. The base material 2 is formed of a resin and is covered with a coating layer 3. The covering layer 3 is formed so as to wrap around from the front surface 4 as the design surface of the base material 2 to a part of the back surface 5 continuous with the design surface (where the double-sided tape is applied). In addition, in order to make it easy to understand in the drawing, the covering layer 3 is shown thick, and the thickness of the covering layer 3 is actually very thin compared to the thickness of the base material 2.
[0025]
For the resin as the material of the base material 2, for example, thermoplastic resins such as polyethylene, polypropylene, acrylonitrile-butadiene-styrene copolymer, polycarbonate, polyamide, polyethylene terephthalate, polybutylene terephthalate, and modified polyphenylene ether are used. Further, a thermosetting resin such as an unsaturated polyester resin may be used. Alternatively, these alloy materials, and those in which a fibrous or scaly filler is blended may be used.
[0026]
Examples of the coating agent as the material for the coating layer 3 include urethane acrylate oligomers having at least two (meth) acrylate groups, oligomers such as epoxy acrylate oligomers, or resins thereof, or unsaturated polyester resins of 20 to 70% by weight. And copolymerizable ethylene such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, (meth) acrylic acid, vinyl acetate, styrene A coating agent comprising a vehicle component comprising 80 to 30% by weight of the unsaturated monomer, a pigment and a polymerization initiator is used. Alternatively, a two-pack type coating agent such as an epoxy resin / polyamine curing system or a polyol resin / polyisocyanate curing system in which the main agent / curing agent is mixed immediately before injection into the mold may be used. In addition, the coating layer 3 formed from these coating agents has favorable adhesiveness with respect to a well-known double-sided tape.
[0027]
Next, a mold apparatus 11 for manufacturing the side molding 1 will be described.
FIG. 1 is a schematic cross-sectional view showing a state in which the mold apparatus 11 is closed. 2A shows a schematic enlarged sectional view taken along the line IIA-IIA in FIG. 1, and FIG. 2B shows a schematic enlarged sectional view taken along the line IIB-IIB in FIG. FIG. 3 is a schematic cross-sectional view showing a state where the mold apparatus 11 is slightly opened. In FIG. 3, for the sake of easy understanding, the mold apparatus 11 is illustrated as being opened larger than the actual size.
[0028]
As shown in FIG. 1, the mold apparatus 11 includes a fixed mold 12 as a first mold, a movable mold 13 as a second mold, and first and second slide cores 14 and 15. . The fixed mold 12 is installed above the movable mold 13. The mold apparatus 11 is clamped by moving the movable mold 13 upward toward the fixed mold 12.
[0029]
The fixed mold 12 has a recess 16 formed on the surface facing the movable mold 13. In the movable mold 13, housing recesses 17 and 18 are formed at positions facing both ends of the recess 16, and a protrusion 19 is formed between the housing recesses 17 and 18. The first and second slide cores 14 and 15 are accommodated in the accommodating recesses 17 and 18, respectively.
[0030]
Each of the slide cores 14 and 15 is formed in a substantially rectangular parallelepiped shape, and is driven by a driving device (not shown) in the same direction as the moving direction of the movable mold 13 (vertical direction in FIG. 1). That is, the slide cores 14 and 15 are formed such that the upper surfaces 14a and 15a as the cavity forming surfaces are horizontal. Each of the slide cores 14 and 15 has a first position where the upper surfaces 14a and 15a are located at the same height as the boundary between the housing recesses 17 and 18 and both ends of the protrusion 19, and slightly below the first position. Between the second position and the second position.
[0031]
As shown in FIG. 1, the slide cores 14 and 15 are arranged at the first position, and the movable mold 13 is joined to the fixed mold 12 (the mold apparatus 11 is closed). A cavity 20 for forming the base material 2 is formed between the recess 16 and the protrusion 19.
[0032]
The first parting surface 31 of the mold apparatus 11 is formed on the left side of the cavity 20, and the second parting surface 32 is formed on the right side of the cavity 20.
A coating agent injection port 35 is formed on the left end surface 12 a of the fixed mold 12. A coating agent injection device (not shown) is connected to the coating agent injection port 35.
[0033]
The fixed mold 12 is formed with a first gate 36 that communicates with the coating agent inlet 35. As shown in FIG. 1 and FIG. 2A, the gate 36 is formed in a hole shape, and is sealed facing the side surface of the slide core 14 slightly below the upper surface 14a with the mold apparatus 11 closed. It is formed to be. When the mold apparatus 11 is slightly opened, the slide core 14 is moved to the second position, thereby communicating with a gap generated at a position facing the upper surface 14a. The first parting surface 31 is formed below the gate 36 so as to contact the side surface of the slide core 14.
[0034]
A resin injection port 40 is formed on the right end surface 13 a of the movable mold 13. A resin injection device (not shown) is connected to the resin injection port 40.
A protrusion 41 of the movable mold 13, a protrusion 42 of the fixed mold 12, and a protrusion 43 of the movable mold 13 are formed in this order from the resin injection port 40 side between the resin injection port 40 and the housing recess 18. . The second parting surface 32 is bent so as to form the protrusions 41, 42 and 43. The upper surface of the protrusion 43 is formed so as to be inclined upward toward the cavity 20. A hole 45 communicating with the resin injection port 40 is formed in the protrusion 41, and a hole 46 is formed in the protrusion 42. As shown in FIG. 1, the holes 45 and 46 are communicated with each other with the mold apparatus 11 closed.
[0035]
As shown in FIG. 2B, a small protrusion 47 is formed on the upper surface of the protrusion 43, and a groove 48 is formed in the small protrusion 47. The holes 45 and 46 and the groove 48 constitute a second gate. The groove 48 is formed so as to communicate with the cavity 20. The left end 32a of the parting surface 32 is formed so as to contact the slide core 15 positioned at the first position slightly below the upper surface 15a except for the portion facing the small protrusion 47.
[0036]
As shown in FIG. 1, when the mold apparatus 11 is closed, the resin injection port 40 communicates with the cavity 20 through holes 45 and 46 and a groove 48. When the mold apparatus 11 is slightly opened (the state shown in FIG. 3), the hole 45 faces the protrusion 42 and is sealed. The groove 48 is also sealed so as to face the protrusion 42, and the hole 46 is sealed so as to face the protrusion 41. That is, the resin injection port 40 communicates with the cavity 20 when the mold apparatus 11 is closed, and is sealed when the mold apparatus 11 is slightly opened.
[0037]
Next, a method for manufacturing the side molding 1 using the mold apparatus 11 will be described.
First, as shown in FIG. 1, the movable mold 13 is joined to the fixed mold 12, the slide cores 14 and 15 are moved to the first position, and the mold apparatus 11 is clamped to form the cavity 20.
[0038]
Next, the molten resin that is the material of the base material 2 is injected into the resin injection port 40 from a resin injection device (not shown), and the resin is filled into the cavity 20 through the holes 45 and 46 and the groove 48.
[0039]
At this time, since the parting surfaces 31 and 32 are in contact with the side surfaces of the slide cores 14 and 15, the resin filled in the cavity 20 does not enter the parting surfaces 31 and 32.
[0040]
Next, the resin in the cavity 20 is cured to mold the base material 2. Since the resin slightly shrinks (molding shrinkage) when it is cured, it shrinks toward the protrusion 19 and slightly separates from the fixed mold 12. After the base material 2 is formed, the mold apparatus 11 is slightly opened as shown in FIG. 3 in order to form a gap for forming the coating layer 3. That is, the movable mold 13 is slightly lowered and both the slide cores 14 and 15 are moved to the second position.
[0041]
The base material 2 moves downward together with the movable mold 13 while being attached to the movable mold 13, and is separated from the fixed mold 12. By this movement, a gap 53 is formed between the concave portion 16 of the fixed mold 12 and the surface 4 of the substrate 2. Gaps 54 and 55 are formed between the upper surfaces 14a and 15a and a surface corresponding to a part of the back surface 5 continuous with the front surface 4, respectively. The gaps 53 to 55 are communicated with each other through a gap formed by contraction when the resin in the cavity 20 is cured. The gaps 53 and 55 communicate with each other at a portion other than the portion facing the small protrusion 47 where the resin remains in the groove 48.
[0042]
The hole 45 faces the protrusion 42 and is sealed. The groove 48 is also sealed so as to face the protrusion 42, and the hole 46 is sealed so as to face the protrusion 41. The coating agent inlet 35 communicates with the gaps 53 and 54 via the gate 36. A gap 58 generated at a location corresponding to the first parting surface 31 is sealed so as to face the side surface of the slide core 14.
[0043]
Next, a coating material that is a material of the coating layer 3 is injected into the coating material injection port 35 from a coating material injection device (not shown), and the coating material is filled into the gaps 53 to 55 through the gate 36.
[0044]
Next, the mold apparatus 11 is slightly clamped before the coating is completely cured. And after a coating agent hardens | cures completely and the coating layer 3 is shape | molded, the mold apparatus 11 is opened and the molded side molding 1 is taken out.
[0045]
The side molding 1 manufactured as described above has a double-sided tape attached to the portion of the back surface 5 where the coating layer 3 is formed, and is attached to the side surface of the vehicle via the double-sided tape.
[0046]
According to this embodiment, the following effects are obtained.
(1) Since the side molding 1 molded by the mold apparatus 11 wraps around from the front surface 4 of the base material 2 and the coating layer 3 is also formed on the back surface 5, the coating layer 3 becomes difficult to peel off and relates to peeling. Liquid resistance and heat resistance can be improved.
[0047]
(2) Since the covering layer 3 is made of a material having good adhesiveness to the double-sided tape, the side molding 1 can be obtained by simply attaching the double-sided tape to the portion of the back surface 5 where the covering layer 3 is formed. It is attached to the vehicle with a suitable adhesive force. Therefore, the step of applying the primer can be eliminated, and the side molding 1 can be attached to the vehicle at a low cost.
[0048]
(3) Since the parting surfaces 31 and 32 are in contact with the side surfaces of the slide cores 14 and 15 when the substrate 2 is molded, the resin filled in the cavity 20 is in the parting surfaces 31 and 32. Does not invade. Therefore, generation | occurrence | production of the burr | flash at the time of shape | molding the base material 2 can be reduced.
[0049]
(4) Since the second parting surface 32 is formed in a stepped shape, the resin injection port 44 is communicated with the cavity 20 through the holes 45 and 46 and the groove 48 when the mold apparatus 11 is closed. However, when the mold apparatus 11 is slightly opened, the resin injection port 44 is sealed by the hole 45 facing the protrusion 42. Accordingly, the coating agent can be prevented from flowing back to the resin injection port 44.
[0050]
(5) Since the gate 36 is formed so as to face the slide core 14 slightly below the upper surface 14a when the mold apparatus 11 is closed, the gate 36 is covered when the mold apparatus 11 is closed. The agent injection port 35 is sealed, and when the mold apparatus 11 is slightly opened, the coating agent injection port 35 communicates with the gaps 53 to 55 through the gate 36. Therefore, the resin as the material of the base material 2 can be prevented from flowing back to the coating material inlet 35.
[0051]
(6) The first parting surface 31 is formed below the upper surface 14a so that the gap 58 generated by opening the first parting surface 31 faces and seals the side surface of the slide core 14. Yes. Therefore, since the gap 58 does not communicate with the gaps 53 to 55, the generation of burrs when the coating layer 3 is formed can be reduced.
[0052]
(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0053]
FIG. 5A shows a schematic cross-sectional view with the mold apparatus closed, and FIG. 5B shows a schematic cross-sectional view with the mold apparatus opened slightly.
In the mold apparatus 61 shown in FIGS. 5A and 5B, the resin injection port 62 for injecting the resin as the material of the base material 2 is formed at the center of the lower end surface of the movable mold 13. The gate 63 that communicates with the cavity 20 extends upward and is formed so as to communicate with the cavity 20 at the center of the protrusion 19.
[0054]
The second parting surface 64 is formed so as to be in contact with the slide core 15 located at the first position. As shown in FIG. 5B, when the mold apparatus 61 is slightly opened, the gap 65 formed by opening the parting surface 64 is sealed so as to face the slide core 15.
[0055]
When the side molding 1 is formed by the mold apparatus 61 as described above, first, as shown in FIG. 5A, the mold apparatus 61 is closed and the slide cores 14 and 15 are moved to the first position. In the state where the cavity 20 is formed, the resin which is the material of the base material 2 is injected and filled into the cavity 20 from the gate 63. Next, after the resin in the cavity 20 is cured and the base material 2 is molded, as shown in FIG. 5B, the mold device 61 is slightly opened and the slide cores 14 and 15 are moved to the second position. The gaps 53 to 55 communicating with each other are formed, and a coating agent that is a material of the coating layer 3 is injected and filled from the gate 36 into the gaps 53 to 55.
[0056]
According to this embodiment, in addition to the effects (1) to (3), (5) and (6) of the above embodiments, the following effects are obtained.
(7) The second parting surface 64 is formed below the upper surface 15a so that the gap 65 generated by opening the second parting surface 64 faces and seals the side surface of the slide core 15. ing. Therefore, since the gap 65 does not communicate with the gaps 53 to 55, the generation of burrs when the coating layer 3 is formed can be further reduced.
[0057]
(8) Since the gate 63 for injecting resin as the material of the base material 2 is formed so as to communicate with the cavity 20 from the protrusion 19 side, the burr due to the resin injection from the gate 63 is formed on the back surface 5. The Therefore, burrs can be made less noticeable, and the quality of the appearance of the side molding 1 can be further improved.
[0058]
(9) Since the gate 63 is formed so as to communicate with the cavity 20 at the center of the protrusion 19, the coating agent can be prevented from flowing back to the resin injection port 62 through the gate 63 with a simpler configuration.
[0059]
In addition, embodiment is not limited to said each embodiment, For example, you may change as follows.
The shape of the slide core is not limited to a substantially rectangular parallelepiped shape. For example, as shown in FIG. 6B, the covering layer 71 is formed so as to cover the back surface 5 of the base material 2 to the inner side. As shown to a), even if it forms so that the upper surfaces 72a and 73a as a cavity formation surface of the slide cores 72 and 73 located in a 1st position may contact the part inside the back surface 5 of the base material 2 further inside. Good. In this case, the coating layer can be further prevented from peeling off.
[0060]
The gate for injecting the coating material that is the material of the coating layer 3 is formed in the movable die 13 so as to go around the housing recess 17 or the housing recess 18 so as to communicate with one of the gaps 54 and 55 from the protrusion 19 side. May be. In this case, since the burr by injection from the gate is formed on the back surface 5 side, the burr can be made less noticeable, and the appearance quality of the side molding 1 can be further improved. When the mold apparatus is closed, the gate is sealed against the side surface of the slide core, so that the resin can be prevented from flowing back to the coating agent injection port even in this configuration.
[0061]
-It is not restricted to providing a slide core corresponding to the both ends of the width direction of a base material, You may provide a slide core also in the location corresponding to the both ends of the longitudinal direction of a base material. In this case, the coating layer can be formed so as to cover the portion of the back surface 5 that is continuous with both ends in the longitudinal direction. Alternatively, all slide cores may be integrated to form a substantially annular slide core.
[0062]
The passage for communicating the coating agent injection port 35 and the gaps 53 and 54 may be formed, for example, so that the coating agent injection port 35 and the gaps 53 and 54 communicate with each other when the parting surface is opened. For example, in the configuration of the first embodiment, a step is provided on the first parting surface 31, and the upper surface of the step is below the upper surface 14a of the slide core 14 when it is disposed at the first position. It is formed so as to be above the upper surface 14a of the slide core 14 when it is arranged at the second position, and is formed so that the right end of the first gate 36 faces the upper surface of the step.
[0063]
-The structure of the mold apparatus for forming the gaps 54 and 55 is not limited to the installation so that the slide core can be driven. For example, after molding the substrate 2 in the mold apparatus, the mold apparatus is slightly opened, The base material 2 may be supported at both ends in the longitudinal direction, the base material 2 may be suspended in the air, and then a coating layer may be formed.
[0064]
The mold apparatus 11 may be formed so that the first mold is a movable mold and the second mold is a fixed mold. That is, a mold having the recess 16 is a movable mold, and a mold having a slide core is a fixed mold.
[0065]
The mold apparatus 11 is not limited to the configuration in which the movable mold 13 moves in the vertical direction, and may be configured to move in the left-right direction, for example.
The present invention is not limited to the molding method and mold apparatus for the side molding, and may be implemented in the molding method and mold apparatus for other coated molded products such as rocker molding and bumpers.
[0066]
  The technical idea that can be grasped from each of the above embodiments will be described below.
  (1)in frontThe parting surface is provided on the same plane as the cavity forming surface of the slide core positioned at the first position or slightly on the opposite side of the cavity forming surface.
[0067]
【The invention's effect】
  As described above in detail, according to the first aspect of the present invention, a coated molded product in which the coating layer is difficult to peel off from the substrate can be easily molded in the mold. Claims 2 to 25According to the invention described in Item 1, the invention described in Item 1 can be easily implemented.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a state in which a mold apparatus according to a first embodiment is closed.
2A is a schematic enlarged sectional view taken along the line IIA-IIA in FIG. 1, and FIG. 2B is a schematic enlarged sectional view taken along the line IIB-IIB in FIG.
FIG. 3 is a schematic cross-sectional view showing a state where the mold apparatus is slightly opened.
FIG. 4 is a schematic sectional view of a side molding.
5A and 5B show a mold apparatus according to a second embodiment, in which FIG. 5A is a schematic cross-sectional view in a closed state, and FIG. 5B is a schematic cross-sectional view in a state in which the mold apparatus is slightly opened.
6A is a schematic cross-sectional view of a mold apparatus that houses another slide core, and FIG. 6B is a schematic cross-sectional view of a side molding.
FIG. 7 is a schematic cross-sectional view of a conventional side molding.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Side molding as a covering molding product, 2 ... Base material, 3,71 ... Covering layer, 4 ... Front surface as design surface, 5 ... Back surface, 11, 61 ... Mold apparatus, 12 ... As 1st metal mold | die , 13... Movable mold as second mold, 14, 72... First slide core, 14 a, 15 a, 72 a, 73 a, upper surface as cavity forming surface, 15, 73, second slide core , 16 ... recess, 20 ... cavity, 31 ... first parting surface, 32, 64 ... second parting surface, 35 ... coating agent inlet, 36 ... first gate, 44, 62 ... resin inlet 45, 46 ... holes constituting the second gate, 48 ... also grooves, 53-55 ... gaps.

Claims (5)

A method for forming a coated molded article in which a base material is coated with a coating material in a cavity of a mold,
Injecting the material of the base material into the cavity and molding the base material;
By slightly opening the mold and moving the slide core provided in the cavity in a direction away from the cavity by a predetermined distance, the design surface of the base material and a part of the back surface continuous to the design surface; Forming a gap at the opposing position;
A step of injecting the coating agent into the gap and forming a coating layer covering the design surface of the base material and a part of the back surface continuous with the design surface. . A mold apparatus comprising a first mold and a second mold, and coating a base material with a coating material in a cavity formed between both molds, and molding a coated molded product,
The first mold is provided with a recess for forming the cavity, and the second mold is provided with a slide core at a position corresponding to at least both ends of the recess in the width direction,
The slide core is separated from the cavity by a predetermined distance from the first position constituting a cavity for molding the base material together with the two molds in a state where the two molds are joined. Provided to be movable to the second position moved in the direction,
After forming the base material in a state where the slide core is disposed at the first position, the slide core is moved to the second position, and the gap between the cavity forming surface of the slide core and the base material is formed. Provide a path through which the coating agent can be injected from the coating agent inlet ,
The parting surface between the molds is provided on the same plane as the cavity forming surface of the slide core located at the first position or on the side opposite to the cavity from the cavity forming surface,
A resin inlet for injecting a resin for forming a base material is provided on one of the molds, and a coating agent inlet is provided on the other.
The resin injection port and the cavity can communicate with each other when the two molds are joined, and the coating agent injection port and the cavity cannot communicate with each other, and the coating agent is slightly separated from each other. A mold apparatus , wherein the injection port and the cavity can communicate with each other, and the resin injection port and the cavity cannot communicate with each other. A mold apparatus comprising a first mold and a second mold, and coating a base material with a coating material in a cavity formed between both molds, and molding a coated molded product,
The first mold is provided with a recess for forming the cavity, and the second mold is provided with a slide core at a position corresponding to at least both ends of the recess in the width direction,
The slide core is separated from the cavity by a predetermined distance from the first position constituting a cavity for molding the base material together with the two molds in a state where the two molds are joined. Provided to be movable to the second position moved in the direction,
After forming the base material in a state where the slide core is disposed at the first position, the slide core is moved to the second position, and the gap between the cavity forming surface of the slide core and the base material is formed. Provide a path through which the coating agent can be injected from the coating agent inlet,
The parting surface between the two molds is provided so as to be located on the same plane as the cavity forming surface of the slide core located at the first position or on the opposite side of the cavity forming surface,
One of the molds is provided with the coating agent inlet and a first gate as the path communicating with the coating agent inlet,
The first gate is sealed so as to face the slide core slightly on the side opposite to the cavity from the cavity forming surface in a state where the slide core is disposed at the first position . Mold device. A mold apparatus comprising a first mold and a second mold, and coating a base material with a coating material in a cavity formed between both molds, and molding a coated molded product,
The first mold is provided with a recess for forming the cavity, and the second mold is provided with a slide core at a position corresponding to at least both ends of the recess in the width direction,
The slide core is separated from the cavity by a predetermined distance from the first position constituting a cavity for molding the base material together with the two molds in a state where the two molds are joined. Provided to be movable to the second position moved in the direction,
After forming the base material in a state where the slide core is disposed at the first position, the slide core is moved to the second position, and the gap between the cavity forming surface of the slide core and the base material is formed. Provide a path through which the coating agent can be injected from the coating agent inlet,
The parting surface between the two molds is provided so as to be located on the same plane as the cavity forming surface of the slide core located at the first position or on the opposite side of the cavity forming surface,
One of the molds is provided with a resin injection port for injecting a resin that forms a base material, and a second gate that communicates the resin injection port and the cavity includes a movement direction of the mold. substantially it features and to Rukin type device that is formed on the both molds to intersect a portion of the parting surface formed so as to extend in the same direction. The parting surface between the two molds is at least a distance between the first position and the second position, and the molds are slightly separated from the cavity forming surface of the slide core on the side opposite to the cavity. The mold apparatus according to any one of claims 2 to 4, wherein the mold apparatus is provided so as to be located at a distance apart from the total distance .

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