JP5449867B2 - Resin molded product and method for producing resin molded product - Google Patents

Description

  The present invention relates to a resin molded product including an insert material embedded in a resin part in a state where a part of the resin part is exposed from the resin part, and a manufacturing method thereof.

  Conventionally, there is a resin molded product in which an insert material is embedded in a resin portion in a state where the surface of an insert material such as a metal is exposed. Such a resin molded product is formed by disposing an insert material in a cavity in a mold and injection molding a resin in the cavity. In order to expose the insert material on the surface of the resin molded product, the insert material in the cavity is pressed against one mold when the resin molded product is injection molded. In the prior art, as described in Patent Document 1 (see FIG. 13), the part on the surface side of the insert material is fixed at a predetermined position by a positioning pin or the like provided on the mold, and in this state, the resin Injection molding was performed.

JP 2000-127198 A

In recent years, resin molded products have been diversified, and resin molded products having an unprecedented design aspect have been desired. For example, a product that includes an insert material exposed on the surface and further changes the shape of the exposed portion of the insert material.
However, in the prior art, even if the shape of the insert material can be changed, it is not possible to form a free pattern such as placing the resin part on the exposed surface of the insert material, greatly improving the design of the resin molded product. It wasn't until the change.

  Therefore, an object of the present invention is to form a resin part for characters and patterns on the exposed surface of an insert material to obtain a resin molded product excellent in design.

The first characteristic configuration of the resin molded product according to the present invention is a resin molded product in which the insert material is embedded in the resin portion with a part thereof exposed,
Of the exposed surface of the insert material, comprising a resin filling portion filled with a resin that forms the resin portion in at least a partial region of the inner portion,
There is at least two communicating portions that communicate the resin-filled portion and the resin portion around the insert material along the planar direction of the insert material with respect to the resin-filled portion.

With this configuration, since a communication portion is provided to connect the resin filling portion and the resin portion around the insert material, the resin filling around the insert material and the resin in the resin filling portion of the insert material during resin injection molding Filling can be performed simultaneously.
In addition, since at least two communicating portions are provided, when the resin flows into the resin filling portion from one communicating portion, excess resin in the resin filling portion can flow out from the other communicating portion. Therefore, problems such as air accumulation in the resin filling portion and defective filling of the resin can be solved.

Furthermore, since the communication portion is provided along the plane direction of the insert material with respect to the resin filling portion, the flow of resin between the resin portion around the insert material and the resin filling portion during the injection molding is smooth. Thus, problems such as poor filling of the resin in the resin filling portion are unlikely to occur.
Thus, in a resin molded product embedded with the insert material exposed on a part of the surface, the resin not only changes the shape of the insert material but also has a free pattern on the inner part of the insert material It is possible to provide a resin molded product that is excellent in design and rich in variations.

  A second characteristic configuration of the resin molded product according to the present invention is that at least one of the communication portions is formed in a portion excluding the surface of the insert material.

  As described above, the communication portion is formed on the portion excluding the surface of the insert material, that is, the back side or the side surface, and the communication portion is not formed on the surface side where the insert material is exposed. If it does so, the front side peripheral part of an insert material can be exposed completely, and the designability of the insert material embed | buried under resin will improve. In addition, the design of the resin molded product as a whole is improved because the display of characters and patterns made of the resin-filled portion inside the designable insert material gives an impression that stands out from the resin portion around the insert material. .

  According to a third characteristic configuration of the resin molded product according to the present invention, at least one of the communication portions is the insert material by cutting a part of the resin-filled portion on the surface side to the outer edge end portion of the insert material. The thickness of the insert material in the communication portion and the resin filling portion continuous therewith is formed so as to gradually decrease toward the outer edge of the insert material. In the point.

  When there is a large difference between the resin thickness at the resin-filled portion or the communication portion at the outer edge of the insert material and the thickness of the resin around the insert material, the resin portion at the outer edge of the insert material 4 when the resin portion contracts after resin molding 5 and a resin portion 5 around the insert material 4 cause a step due to a difference in resin thickness, which is not preferable in terms of the appearance of the resin molded product. Therefore, as in the above-described configuration, the thickness of the insert material in the communication portion and the resin filling portion continuous thereto is gradually reduced toward the outer edge of the insert material. In this case, the thickness of the resin in the communication portion or the communication portion and the resin filling portion continuous therewith gradually increases, so that the resin portion around the insert material due to the shrinkage of the resin portion and the communication portion on the outer edge of the insert material Can be suppressed as much as possible. Therefore, on the surface of the resin molded product, the communicating portion of the insert material, the resin portion of the resin filling portion continuous therewith, and the resin portion around the insert material are smoothly continuous, and the design of the resin molded product is improved. improves.

The first characteristic means of the method for producing a resin molded product according to the present invention is such that at least a part of the insert material is embedded in the resin portion, and the resin-filled portion is provided in the inner portion on the surface side where the embedded insert material is exposed. A method for producing a resin molded product, comprising:
A resin filling portion is formed in the inner portion on the front surface side, and a communication portion that communicates the resin filling portion and the resin portion around the insert material is provided along the planar direction of the insert material with respect to the resin filling portion. Using at least two inserts,
An insert material placement step of positioning and placing the insert material on the first mold;
A cavity forming step of clamping the first mold and the second mold to form a cavity for resin injection between the first mold, the second mold and the insert material;
Resin injection for injecting resin from one of the communicating portions formed in the insert material, and allowing resin to flow out from the other of the communicating portions to fill both the resin filling portion and the resin injection cavity. And a step provided with each step.

With this configuration, it is possible to easily manufacture a resin molded product in which at least a part of the insert material is embedded in the resin portion and the resin-filled portion is provided in the inner portion on the surface side where the embedded insert material is exposed.
That is, an insert having a resin filling portion and at least two communication portions that communicate the resin filling portion and the resin portion around the insert material with respect to the resin filling portion along the surface of the insert material. By using the material, the insert material is placed in the mold, the mold is clamped with the mold to form the cavity, and then the resin is injected into both the resin filling part and the cavity by simply injecting the resin into the cavity. Can be produced.

  The 2nd characteristic means of the manufacturing method of the resin molded product which concerns on this invention exists in the point formed by the site | part except the surface of the said insert material at least 1 of the said communication part of the said insert material.

With this configuration, the communicating portion is formed at a portion other than the surface of the insert material, so that the injected resin flows into or out of the resin filling portion from the back side or side surface of the insert material. A resin molded product in which an unnecessary resin portion due to the communication portion is not formed on the surface can be manufactured.
Moreover, if all the communication portions are formed in a portion excluding the surface of the insert material, a resin molded product in which unnecessary resin portions due to the communication portions are not formed at all on the surface of the insert material can be manufactured.

  According to a third feature of the method for producing a resin molded product according to the present invention, in the resin injection step, the resin is injected from the resin injection gate provided in the first mold toward the back surface of the insert material. It is in the point which did.

  With this configuration, when the resin is injected into the cavity, the resin can be applied to the back side of the insert material from the resin injection gate. As a result, the insert material is pressed toward the second mold at the start stage of the resin injection process. Therefore, the resin injected after that does not enter between the insert material and the second mold, and a resin molded product having a good surface can be obtained.

It is a figure which shows the resin molded product which concerns on Embodiment 1. FIG. It is a perspective view of the insert material which concerns on Embodiment 1, Comprising: (a) shows the surface side which an insert material exposes, (b) shows the back surface side of an insert material. It is a figure which shows the state by which the insert material was arrange | positioned at the 1st metal mold | die in the formation process of the resin molded product which concerns on Embodiment 1. FIG. It is a figure which shows the formation process of the resin molded product which concerns on Embodiment 1, Comprising: (a) is IVa-IVa sectional drawing of [FIG. 3], (b) is IVb-IVb sectional drawing of [FIG. 3]. FIG. 4C is a cross-sectional view taken along the line IVc-IVc in FIG. 3. It is a figure which shows the resin molded product which concerns on Embodiment 2. FIG. It is a perspective view of the insert material which concerns on Embodiment 2, Comprising: (a) shows the surface side which an insert material exposes, (b) shows the back surface side of an insert material. It is a figure which shows the state by which the insert material was arrange | positioned at the 1st metal mold | die in the formation process of the resin molded product which concerns on Embodiment 2. FIG. It is a figure which shows the shaping | molding process of the resin molded product which concerns on Embodiment 2, Comprising: It is VIII-VIII sectional drawing of FIG. It is a figure which shows the resin molded product which concerns on Embodiment 3. FIG. It is a perspective view of the insert material which concerns on Embodiment 3, Comprising: (a) shows the surface side which an insert material exposes, (b) shows the back surface side of an insert material. It is a figure which shows the state by which the insert material was arrange | positioned at the 1st metal mold | die in the formation process of the resin molded product which concerns on Embodiment 3. FIG. It is a figure which shows the shaping | molding process of the resin molded product which concerns on Embodiment 3, Comprising: (a) is XIIa-XIIa sectional drawing of [FIG. 11], (b) is XIIb-XIIb sectional drawing of [FIG. is there. Sectional view showing a conventional insert molding method

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Each embodiment shown below is embedded in the resin part 5 in a state where a part of the insert material 4 is exposed, and a resin molded product 100 provided with a resin filling part 4A in the inner part of the insert material 4, and The 1st metal mold | die 1 and the 2nd metal mold | die 2 which concern on the manufacture are shown.

Embodiment 1
FIG. 1 shows a resin molded product 100 according to Embodiment 1 of the present application. This resin molded product 100 includes, as the insert material 4, a resin-filled portion 4A on the inner side on the surface side of the insert material 4, and further includes an independent exposed portion 4D of the independent insert material 4 on the inner side. Product 100.

  The resin molded product 100 includes a resin-filled portion 4A on the inner side on the surface side of the insert material 4, and further includes an independent exposed portion 4D of the independent insert material 4 on the inner side. As shown in FIG. 2A, the insert material 4 is formed by cutting out a resin-filled portion 4 </ b> A filled with resin on the surface side into a concave shape in the shape of “A”. Further, as shown in FIG. 2 (b), a communication portion 4B that connects the resin filling portion 4A and the outer edge of the insert material 4 to the back side of one end side of the insert material 4 (the upper side of the letter “A”) is an insert. It is formed along the plane direction of the material 4, and the resin flows into the resin filling portion 4A from the communication portion 4B during the injection molding. Further, on the back side of the other side of the insert material 4 (the lower side of the letter “A”), a communication portion 4C that communicates the resin filling portion 4A and the outer edge of the insert material 4 extends along the planar direction of the insert material 4. Two of them are formed, and excess resin in the resin filling portion 4A flows out from the communication portion 4C. Further, since the resin filling portion 4A is formed in a concave shape, the resin portion 5 is locked with the insert material 4, and the effect of preventing the insert material 4 from coming off from the resin molded product 100 is exhibited.

  It is preferable that at least one of the communication portion 4B or the communication portion 4C is formed at a portion excluding the surface of the insert material 4. When the communicating portion is formed on the portion excluding the surface of the insert material 4, that is, on the back surface side or the side surface, the peripheral edge portion on the front side of the insert material 4 can be completely exposed from the resin molded product 100. Therefore, the designability of the insert material 4 embedded in the resin is enhanced. Further, depending on the position of the resin injection gate 6 used in the injection molding, the resin flows into the resin filling portion 4A from the communication portion 4C, and the resin flows out of the resin filling portion 4A from the communication portion 4B. The communication part into which the resin flows and the communication part from which the resin flows out may be reversed.

  An independent exposed portion 4 </ b> D that is a part of the insert material 4 may be further formed inside the resin filling portion 4 </ b> A of the insert material 4. The independent exposed portion 4D is formed integrally with the outer frame 4b of the insert material 4 via the bottom surface portion 4a of the resin filling portion 4A.

  A resin molded product 100 shown in FIG. 1 is manufactured using a first mold 1 and a second mold 2 as shown in FIGS. 3 and 4. 3 is a view showing a state in which the insert material 4 is arranged in the first mold 1, FIG. 4 (a) is a sectional view taken along the line IVa-IVa in FIG. 3, and FIG. 4 (b) is a view taken along IVb in FIG. FIG. 4C is a cross-sectional view taken along line IV-IVb, and FIG. 4C is a cross-sectional view taken along line IVc-IVc in FIG.

  The 1st metal mold | die 1 and the 2nd metal mold | die 2 are arrange | positioned at right and left, and the whole metal mold | die is opened and closed by moving each to right and left. In the first mold 1 and the second mold 2, a decorative film 20 for decorating the resin portion 5 of the resin molded product 100 to be manufactured is inserted. When the decorative film 20 is used, it is necessary to prevent dust, resin debris, etc. remaining in the mold when the manufactured resin molded product 100 is discharged from being mixed into the resin molded product 100 to be manufactured next. There is. For this reason, the mold is arranged so as to open and close in the left-right direction in order to facilitate removal and cleaning of dust, resin residue, etc. in the mold.

  The decorative film 20 is a film on which a pattern is printed. The pattern printed on the decorative film 20 is transferred to the resin surface simultaneously with the molding of the resin molded product 100, and a decorative layer is formed on the surface of the resin portion 5 of the resin molded product 100.

  The first mold 1 is provided with positioning pins 10 which are holding parts for the insert material 4. This positioning pin 10 is engaged with a recess 4c provided at a portion opposite to the exposed side of the insert material 4 so that the insert member 4 is positioned. The insert material 4 may be provided with positioning pins 10, the first mold 1 may be provided with a recess 4 c, and the insert material 4 may be positioned by engaging both.

  The decorative film 20 is arranged along the second mold 2 in a state where the first mold 1 and the second mold 2 are opened. Subsequently, the insert material 4 is positioned as described above, and the insert material 4 is sucked and held using the suction mechanism (passage 11 provided in the first mold), so that the first mold 1 and the second mold 1 are held. Close the mold 2.

  The first mold 1 is provided with a resin injection gate 6, and the gate 6 may be arranged so that the resin is directly injected toward the communication portion 4 </ b> B on the back surface of the insert material 4. When the gate 6 is arranged in this way, the pressure of the resin directly injected from the gate 6 toward the communication portion 4B acts on the insert material 4 to hold the insert material 4 while pressing it toward the second mold 2 side. As a result, the invasion of the resin between the second mold 2 and the insert material 4 is prevented, and the occurrence of resin burrs can be avoided.

  Here, if the processing accuracy of the insert material 4 is high and the thickness of the insert material 4 and the thickness of the cavity 3 formed by the first mold 1 and the second mold 2 are the same, the decorative film 20 is formed on the cavity 3. After the first and second inserts 4 are arranged, the first mold 1 and the second mold 2 are clamped, so that the insert 4 is pressed toward the second mold 2 and the predetermined position is maintained. In this case, the gate 6 provided in the first mold 1 may not be arranged so that the resin is directly injected toward the back surface of the insert material 4.

  As shown in FIG. 4A, the resin injected into the mold flows from the periphery of the insert material 4 into the resin filling portion 4A through the communication portion 4B. Further, as shown in FIG. 4B, since the communication portion 4C is in communication with the resin filling portion 4A, excess resin in the resin filling portion 4A passes through the communication portion 4C and is outside the insert material 4. It flows out into the cavity 3.

  In addition, a hook-like locking portion 4 </ b> F that engages with the resin portion 5 in a direction perpendicular to the front and back direction of the resin molded product 100 is provided on the outer periphery of the insert material 4. If the locking portion 4F has a shape that is gradually reduced in thickness toward the outer peripheral edge, a sufficient locking effect can be obtained with respect to the resin portion 5, and the volume of the insert material 4 is reduced so that the insert material 4 is reduced. Can be configured with good yield. However, when the insert material 4 is securely locked to the resin portion 5 by the resin filling portion 4A, the communication portion 4B, and the communication portion 4C of the insert material 4, the locking portion 4F is extended to the outer periphery of the insert material 4. There is no need to provide it.

  The material of the insert material 4 is, for example, various metals, and the insert material 4 including the resin filling portion 4A and the like is manufactured by performing MIM molding or CNC processing. However, the material of the insert material 4 is not limited to metal, and may be a material other than metal such as ceramic.

  Thus, the insert material 4 is exposed at a predetermined position, the resin filling portion 4A is formed in the inner portion of the insert material 4, and a part of the insert material 4 is exposed inside the resin filling portion 4A. A resin molded product 100 having a decorative layer on the surface is molded.

  The molded resin molded article 100 has an insert material 4 exposed on a part of the surface, and a resin part 5 having a pattern is also arranged on the inner part of the insert material 4, and has excellent design properties. Become. The engaging portion 4F on the outer peripheral portion of the insert material 4 is securely engaged with the resin portion 5, has high adhesion, and when the insert material 4 is made of metal, the durability of the resin molded product 100 is also improved. To do.

[Embodiment 2]
FIG. 5 shows a resin molded product according to Embodiment 2 of the present application. The resin molded product 100 includes a resin filling portion 4A having a letter “F” shape on the inner side on the surface side of the insert material 4, and the resin filling portion 4 A and the resin portion 5 around the insert material 4 are inserted into the insert material 4. It is the structure which communicates in the surface side.

  As shown in FIG. 6A, the insert material 4 is formed by cutting out a resin filling portion 4 </ b> A in which resin is filled on the surface side into a concave shape in the shape of “F”. Further, as shown in FIG. 6B, a communication portion 4B that connects the resin filling portion 4A and the outer edge of the insert material 4 is formed on the back side of one end side of the insert material 4 (the side above the letter “F”). In the injection molding, the resin flows from the communication portion 4B to the resin filling portion 4A. Further, on the back side of the other side of the insert material 4 (the lower side of the letter “F”), one communication portion 4Ca that connects the resin filling portion 4A and the outer edge of the insert material 4 is formed. Excess resin in the resin filling portion 4A flows out from 4C. Further, in the resin molded product 100 in which a part of the resin filling portion 4A on the surface side is cut out to the outer edge and the insert material 4 is embedded in the resin portion 5, the periphery of the resin filling portion 4A and the insert material 4 The resin part 5 is in communication. The communication portion 4Cb in this case is an opening on the side surface of the insert material 4 that is continuous with the resin filling portion 4A.

  FIG. 7 is a view showing a state in which the insert material 4 is arranged in the first mold 1. 8 is a sectional view taken along line VIII-VIII in FIG. The resin molded product 100 is manufactured using the first mold and the second mold in the same manner as the resin molded product described above. The resin injected from the gate 6 into the mold flows from the periphery of the insert material 4 through the communication portion 4B on the back side of the insert material 4 into the resin filling portion 4A. A communication portion 4Ca on the back side of the insert material 4 communicates with the resin filling portion 4A. Further, as shown in FIG. 8, since a part of the resin filling portion 4A is configured as a communication portion 4Cb with the resin portion 5 around the insert material 4, excess resin in the resin filling portion 4A is inserted into the insert material. It flows out to the cavity 3 outside the insert material 4 through the communication portion 4Cb on the side surface of the insert material 4 continuous to the communication portion 4Ca and the resin filling portion 4A.

  Here, in the resin molded product 100, if the thickness of the resin portion 5 of the resin filling portion 4A is uniform, the thickness of the resin rapidly changes at the communication portion 4Cb. Then, when the resin portion contracts after resin molding, a step due to the difference in resin thickness occurs at the communication portion 4Cb, which is not preferable in terms of the appearance of the resin molded product.

  Therefore, as shown in FIG. 8, the thickness of the insert material 4 in the communication portion 4 </ b> Cb and the resin filling portion 4 </ b> A continuous thereto is formed so as to gradually become thinner toward the outer edge of the insert material 4. By doing so, the thickness of the resin gradually increases, and the change in the resin thickness of the resin portion 5 of the outer edge of the insert material 4 and the resin portion 5 of the resin filling portion 4A near the communication portion 4Cb is reduced. It is possible to prevent the occurrence of a step due to the contraction.

  Thus, the insert portion 4 is exposed at a predetermined position, the resin portion 5 is formed in the inner portion of the insert material 4, and the resin portion 5 around the insert material 4 and the resin portion 5 in the inner portion are made of the insert material. A resin molded product 100 that communicates on the surface side and includes a decorative layer on the surface of the resin portion 5 is molded.

[Embodiment 3]
As shown in FIG. 9, the resin molded product according to Embodiment 3 of the present application is embedded in the resin portion 5 so that a part of the insert material 4 is exposed on the surface, and is formed in the inner portion on the surface side of the insert material 4. This is a resin molded product 100 provided with a resin filling portion 4A. A pattern is formed on the surface of the insert material 4 by the resin filling portion 4A. In FIG. 9, the resin filling portion 4A displays the alphabet “L” as the pattern.

  The insert material 4 is, for example, rectangular as a whole, and as shown in FIG. 10A, a resin filling portion 4A in which resin is filled on the surface side is formed in a “L” shape. . Further, as shown in FIG. 10B, a communication portion 4B that connects the resin filling portion 4A and the outer edge of the insert material 4 to the back surface side of the insert material 4 so that the resin can flow into the resin filling portion 4A at the time of injection molding. A communication 4C is formed. By forming the communication portion 4B and the communication portion 4C in this way, the resin flows into the resin filling portion 4A from the communication portion 4B of the insert material 4 at the time of injection molding with resin, and the resin filling portion 4A is excessive from the communication portion 4C. Resin begins to flow out.

  The resin filling portion 4 </ b> A of the insert material 4 penetrates and is formed from the inner side surface portion 4 </ b> E of the insert material 4. Further, a hook-like locking portion 4F that engages with the resin portion 5 in a direction perpendicular to the front and back direction of the resin molded product is provided on the outer periphery of the insert material 4. If the locking portion 4F has a shape that is gradually reduced in thickness toward the outer peripheral edge, a sufficient locking effect can be obtained with respect to the resin portion 5, and the volume of the insert material 4 is reduced so that the insert material 4 is reduced. Can be configured with good yield. The locking portion 4F may be provided on the outer periphery of the insert material 4 or the entire inner side surface portion 4E of the resin filling portion 4A, or may be provided on a part thereof.

  A resin molded product 100 shown in FIG. 9 is manufactured using a first mold 1 and a second mold 2 as shown in FIGS. 11 and 12. 11 is a view showing a state in which the insert material 4 is arranged in the first mold 1, FIG. 12 (a) is a sectional view taken along the line XIIa-XIIa of FIG. 11, and FIG. 12 (b) is a view taken along the line XIIb of FIG. It is -XIIb sectional drawing.

  In a state where the insert material 4 is held while being pressed to the second mold 2 side, resin is injected from the gate 6 provided in the first mold 1. The resin injected into the mold flows from the periphery of the insert material 4 into the resin filling portion 4A through the communication portion 4B. Further, since the communication portion 4C is also connected to the resin filling portion 4A, excess resin in the resin filling portion 4A flows out to the cavity 3 outside the insert material 4 through the communication portion 4C. Thus, the insert part 4 is embedded in the resin part 5 in a state where a part thereof is exposed from the resin part 5, and the resin filling part 4A in the inner part is filled with the resin. Is done.

  The molded resin molded article 100 has an insert material 4 exposed on a part of the surface, and a resin part 5 having a pattern is also arranged on the inner part of the insert material 4, and has excellent design properties. Become. The engaging portion 4A on the outer peripheral portion of the insert material 4 is securely engaged with the resin portion 5, has high adhesion, and if the insert material 4 is made of metal, the durability of the resin molded product is also improved. .

[Another embodiment]
(1) In the first to third embodiments, one or two communication portions 4B and 4C of the insert material are provided at positions opposite to the outer edge of the insert material, but a plurality of communication portions may be provided. Good.

(2) Although Embodiments 1 to 3 have been described using a resin molded product having a decorative layer, the resin molded product according to the present invention may not have a decorative layer. In the decorative film 20 of Embodiments 1 to 3, only the printed pattern is transferred to the resin surface, and the film itself does not remain on the resin surface.

  The resin molded product according to the present invention can be used for various exterior products and the like having excellent design properties provided with resin portions such as letters and patterns on the exposed surface of the insert material.

DESCRIPTION OF SYMBOLS 1 1st metal mold | die 2nd metal mold | die 4 Insert material 4A Resin filling part 4B, 4C, 4Ca, 4Cb Communication part 4D Independent exposure part 5 Resin part 6 Gate 100 Resin molded product

Claims (5)

A resin molded product in which the insert material is embedded in the resin portion with a part thereof exposed,
Of the exposed surface of the insert material, comprising a resin filling portion filled with a resin that forms the resin portion in at least a partial region of the inner portion,
A communicating portion for communicating the resin portion surrounding with the resin-filled portion and the insert material, Ri Oh at least two provided along the planar direction of the insert material to the resin filler,
A part of the resin-filled portion on the surface side is cut out to an outer edge end portion of the insert material, so that at least one of the communication portions is formed as an opening portion on a side surface of the insert material, The resin molded product formed so that the thickness of the insert material in the communication portion and the resin filling portion continuous thereto is gradually reduced toward the outer edge of the insert material .   The resin molded product according to claim 1, wherein at least one of the communication portions is formed in a portion excluding the surface of the insert material. At least a part of the insert material is embedded in the resin portion, and a method for producing a resin molded product including a resin filling portion on the inner side of the exposed surface side of the embedded insert material,
As the insert material, a resin filling portion is formed in the inner portion on the front surface side, and a communication portion that communicates the resin filling portion and the resin portion around the insert material is connected to the resin filling portion with the insert material. At least Yes and two provided, and along the surface of,
A part of the resin-filled portion on the surface side is cut out to an outer edge end portion of the insert material, so that at least one of the communication portions is formed as an opening portion on a side surface of the insert material, Using the insert material formed so that the thickness of the insert material in the communication portion and the resin filling portion continuous thereto is gradually reduced toward the outer edge of the insert material,
An insert material placement step of positioning and placing the insert material on the first mold;
A cavity forming step of clamping the first mold and the second mold to form a cavity for resin injection between the first mold, the second mold and the insert material;
Resin injection for injecting resin from one of the communicating portions formed in the insert material, and allowing resin to flow out from the other of the communicating portions to fill both the resin filling portion and the resin injection cavity. And a process for producing a resin molded product comprising the steps. The method for producing a resin molded product according to claim 3 , wherein at least one of the communicating portions of the insert material is formed in a portion excluding the surface of the insert material. The method for manufacturing a resin molded product according to claim 4 , wherein, in the resin injection step, a resin is injected from a resin injection gate provided in the first mold toward a back surface of the insert material.

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