WO2010090083A1

WO2010090083A1 - Resin molded article and resin product manufacturing die

Info

Publication number: WO2010090083A1
Application number: PCT/JP2010/050793
Authority: WO
Inventors: 西村剛
Original assignee: 日本写真印刷株式会社
Priority date: 2009-02-06
Filing date: 2010-01-22
Publication date: 2010-08-12
Also published as: TW201041716A; JP5607376B2; JP2010201922A

Abstract

An insert member (4) that is embedded in the resin part with a portion exposed from the resin and that is provided, in at least a portion of the part that is embedded in the resin part, with a hook that engages with the resin part in a direction orthogonal to the front-to-back direction of the resin molded article is provided, and a thickness direction positioning part (4C) that provides a decorative layer on the front surface of the resin part and that, during resin molding, positions the front surface of the insert member (4) in a prescribed position of the molding die that forms the front surface of the resin molded article is provided on the back side of the insert member (4).

Description

Resin molded products and molds for manufacturing resin products

The present invention relates to a resin molded product including an insert member embedded in a resin part in a state where a part of the resin part is exposed from the resin part, and a mold related to the manufacture thereof.

Conventionally, there is a resin molded product in which an insert member is embedded in a resin part with the surface of the insert member made of metal or the like exposed. Such a resin molded product is formed by disposing an insert member in a cavity in a mold and injection molding a resin in the cavity. In order to expose the insert member on the surface of the resin molded product, when the resin molded product is injection-molded, the insert member in the cavity is pressed against one mold side. In the conventional technique, as described in Patent Document 1 (see FIG. 27), the surface side portion of the insert member 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, the product includes an insert member exposed on the surface, and further includes a decorative layer with various designs on the surface of the resin molded product.
However, when a decorative layer is provided on the surface of the resin molded product, a fixing pin or the like cannot be provided on the surface side of the insert member as in the prior art. When such a pin or the like is provided on the surface side, the design of the resin molded product is greatly impaired, such as the formation of a hole in the decorative layer. Moreover, when obtaining the resin molded product which comprises both an insert member and a decoration layer, it is necessary to fully exhibit the design property of a decoration layer. Therefore, the positioning of the insert member at the time of resin-made becomes very important.

In this respect, the technique disclosed in Patent Document 1 is provided with a positioning locking portion on the surface of the insert member, and no consideration is given to the arrangement of the decorative layer.
Further, in the technique of Patent Document 1, there is a description that the insert member is pressed against the mold on one side when the resin is injected, but there is no description on how to control the movement of the insert member during the pressing. This is because the relative position between the resin portion and the insert member is determined to some extent if the insert member can simply be pressed against one of the molds during resin injection.
However, when a decorative layer is further provided on the surface, the relative position of both of the insert member and the decorative layer along the plane direction of the product is also very important in order to harmonize the design of the insert member and the decorative layer.
As described above, in the conventional technique, there is still a point to be improved in order to obtain a resin molded product having both the decorative layer and the insert member.

Therefore, an object of the present invention is to obtain a resin-molded product having an insert member and a decorative layer and having excellent design properties, and to obtain a mold used for that purpose.

The first characteristic configuration of the resin molded product according to the present invention is that the resin molded product is embedded in at least a part of the portion embedded in the resin portion with a part thereof exposed from the resin portion. In addition to providing an insert member provided with a locking portion that engages with the resin portion in a direction perpendicular to the front and back directions, the surface of the resin portion is provided with a decorative layer, and the surface of the insert member is A thickness direction position determining portion arranged at a predetermined position of the molding die for forming the surface of the resin molded product is provided on the back side of the insert member.

The resin molded product of this structure embeds the insert member in a state where a part of the insert member is exposed with respect to the resin portion, and includes a decorative layer on the surface of the resin portion. When the surface of the insert member is exposed to the resin part, in order to improve the design of the resin molded product, for example, the surface of the resin part and the surface of the insert member need to be accurately matched. In the resin molded product of this configuration, since the decorative layer is provided on the surface of the resin portion, a particularly high quality is required for the design appearance of the surface.
Therefore, the resin molded product of this configuration is provided with a thickness direction position determining portion for fixing the insert member at a predetermined position at the time of resin injection on the back side of the insert member. Thereby, the member which interferes with a decoration layer at the time of resin injection | pouring can be excluded, and the resin molded product excellent in the surface external appearance can be obtained.

The second characteristic configuration of the resin molded product according to the present invention is that the thickness direction position determining portion is a pressing portion that applies a pressing force by the resin to the back side of the insert member during resin molding.

¡In order to expose the insert member at a predetermined position of the resin molded product in an optimal state, it is preferable to press the insert member on the mold side that forms the surface of the resin molded product. Therefore, in the present invention, as the thickness direction position determining portion, a pressing portion that uses the pressing force of the resin at the time of resin injection is provided on the back side of the insert member. Since the pressing part is a part that receives the pressure of the resin, the pressing part is embedded in the resin when the resin molded product is completed. That is, among the insert members embedded in the resin molded product, the surface portion facing the back side of the resin molded product is the pressing portion.

A third characteristic configuration of the resin molded product according to the present invention is that the pressing portion is an inclined surface formed on the back surface of the insert member.

In order to inject resin into the cavity formed by the mold, it is necessary to provide a resin injection gate at any location of the mold. The position of the gate is determined by various factors such as the shape of the resin molded product and the configuration of the mold. Therefore, the arrangement position of the gate is not necessarily determined based on the arrangement position of the insert member.
Therefore, regardless of the position of the gate, an inclined surface is formed on the back surface of the insert member in order to effectively use the pressure at the time of resin injection. The resin injected into the cavity flows toward every corner of the space. This flow direction has a lot of components along the plane direction of the resin molded product. Therefore, by providing the inclined surface, a part of the flow pressure of the resin is divided in the direction of pressing the insert member to the surface side, and a favorable pressing effect can be obtained.

A fourth characteristic configuration of the resin molded product according to the present invention is that the pressing portion is a notch formed by cutting a part of the back surface of the insert member.

In order to ensure that the insert member is pressed against the mold that forms the surface of the resin molded product when the resin is injected, the distance between the portion of the insert member where the resin pressure acts and the inner wall surface of the mold on the back side is Larger is preferable. In principle, the pressure exerted by the resin on the insert member is equal at all positions where the resin is in contact with the insert member. Therefore, if the part on the back surface side of the insert member is in contact with the resin even a little, the insert member should be pressed toward the mold on the front surface side. However, in reality, the resin has flow resistance and the shape of the cavity varies, so that the desired pressing force can be applied to the insert member simply by contacting the resin with the insert member. Can not. Therefore, as in this configuration, by cutting away a part of the insert member to form a notch, the distance between the front surface of the notch and the inner wall surface of the mold on the back side is secured as much as possible. Thereby, the quantity of resin which exists in the said area | region can be increased, the influence of flow resistance can be reduced, and a pressure can be made to act appropriately on an insert member. As a result, the positioning of the insert member with respect to the resin portion is ensured, and a resin molded product excellent in design can be obtained.

The 1st characteristic structure of the metal mold | die for resin product manufacture concerning this invention is the 1st metal mold | die provided with the holding part which hold | maintains the said insert member in order to obtain the resin molded product in which at least one part of the insert member was embed | buried in resin. The mold and the first mold are clamped while holding the decorative film, and a cavity for resin injection is formed between at least a part of the insert member and the first mold and the decorative film. And a second mold to be provided.

As described above, the resin molded product of the present invention is such that the insert member is embedded in the resin portion so that a part of the insert member is exposed, and a decorative layer is provided on the surface of the resin portion. In order to provide the decoration layer, a holding portion for holding the insert member cannot be provided on the side.
Therefore, as in this configuration, the insert member is held by the holding portion provided in the first mold, and both molds can be clamped while holding the decorative film on the side of the second mold. It is configured. Thereby, a holding | maintenance part does not interfere with a decoration film at the time of resin injection | pouring, and the resin molded product excellent in the surface external appearance can be obtained.

According to a second characteristic configuration of the mold for manufacturing a resin product according to the present invention, the holding portion moves the insert member in a direction perpendicular to a clamping direction of the first mold and the second mold. It is in the point which comprised so that it could hold | maintain and to switch and hold to the state which can be slid along the said mold clamping direction, and the state which cannot slide.

As described above, the resin molded product of the present invention is provided with a decorative layer on the surface and the insert member is disposed on the surface of the resin portion, and particularly excellent design is required. Therefore, in the mold of this configuration, it is necessary to reliably press the insert member against the second mold side when injecting the resin. Therefore, the holding member provided in the first mold is configured so that the insert member can move. However, the movement is configured only in the mold clamping direction in which the insert member approaches and separates from the second mold, and cannot move in a direction perpendicular to the direction.
Furthermore, the mold of this configuration is configured to be able to switch between movement permitting and prohibiting movement in the mold clamping direction. Thereby, for example, when setting an insert member to the 1st metallic mold, movement along a mold clamping direction is prohibited, and a holding function of an insert member is exhibited.
On the other hand, at the stage where the mold clamping between the first mold and the second mold is completed and the resin is injected, the insert member can be moved to the second mold side while allowing movement in the mold clamping direction. It is. As a result, the manufacturing process of the resin molded product is smoothed, and the relative positional relationship with the pattern formed on the decorative layer, such as the position of the insert member in the plane direction of the resin molded product being accurately determined, is optimal. Thus, a resin molded product having a high-quality design appearance can be obtained.

According to a third characteristic configuration of the mold for manufacturing a resin product according to the present invention, the holding portion includes an engagement member that can be engaged with a part of the insert member, and the insert is inserted through the engagement member. In order to bias the member toward the second mold, biasing means connected to the engaging member and the first mold is provided.

As in this configuration, an engagement member that engages with the insert member is provided, and the engagement member is urged toward the second mold by the urging means, so that the insert member can be securely inserted into the second mold during resin injection. It can be pressed to the mold side.
The biasing means may be various means such as one using an elastic member such as various springs, one that exerts a biasing force via liquid or gas, or one that uses magnetic force.

The fourth characteristic configuration of the mold for manufacturing a resin product according to the present invention is that the first mold is provided with a gate for resin injection, and the gate is arranged to face the back surface of the insert member.

By configuring the resin injection gate so as to face the back surface of the insert member as in this configuration, when the resin is injected into the cavity, first, the pressure of the resin can be applied to the back side of the insert member. it can. As a result, the insert member is pressed toward the second mold at the start of the resin injection process. Therefore, it is possible to obtain a resin product having a good surface state without the resin injected thereafter entering between the insert member and the decorative layer, or between the insert member and the second mold. it can.

A fifth characteristic configuration of the resin product manufacturing mold according to the present invention is that the first mold is provided with a clamp for holding at least a part of the outer portion of the insert member during mold clamping. .

When the insert member constitutes a deep-drawn outer peripheral surface in the resin molded product, the decorative film comes into close contact with the outer portion of the insert member during mold clamping. Furthermore, since the insert member and the decorative film are also almost completely in close contact with the cavity surface of the second mold, the decorative film is deformed until it becomes a substantially product shape during mold clamping. Therefore, the decorative film is rubbed strongly by the second mold and the insert member at a portion having a large curvature in the insert member, and inconveniences such as cracks in the decorative layer and breakage of the base film of the decorative film are likely to occur. It was.
Therefore, as in this configuration, the first mold is provided with a clamp that holds at least a part of the outer portion of the insert member when the mold is clamped. Since the outer part of the insert member is held by a clamp provided in the first mold, even if the outer part of the insert member is deep-drawn, the cavity of the second mold can be shaped with a shallow drawing. . As a result, at the time of mold clamping, the decorative film can be arranged along the shallow cavity surface of the second mold so as not to contact the outer portion of the insert member. Therefore, even if the outer side of the insert member is deep drawn, a good resin molded product can be manufactured without tearing the decorative film during mold clamping.

A sixth characteristic configuration of the mold for manufacturing a resin product according to the present invention is that the clamp is movable in a direction perpendicular to the mold clamping direction.

As in this configuration, the clamp is movable in a direction perpendicular to the mold clamping direction, so that the clamp is located at the position where the outer portion of the insert member is held and the outer side of the holding position. When the insert member is disposed on the mold from the mold clamping direction, the mold can be moved to a retreat position that does not interfere. Therefore, when the clamp is moved to the retracted position, the insert member of the first mold can be easily arranged on the cavity surface of the first mold from the mold clamping direction. Further, by moving the clamp to the retracted position when opening the mold, it becomes easy to take out the resin molded product in the mold clamping direction. Thus, the resin product can be efficiently manufactured.

A seventh characteristic configuration of the resin product manufacturing mold according to the present invention is that the clamp is made of a softer material than the insert member.

If the clamp is made of a softer material than the insert member as in this configuration, the impact force that the insert member receives when the clamp is held is partially absorbed by the clamp, which is a softer material than the insert member. The insert member and the clamp are smaller than the case of the same material. Therefore, the possibility that the insert member is deformed by an impact at the time of contact with the clamp is reduced.
Here, when the area of the position determining portion in the thickness direction of the insert member is small, the area of the portion held by the first mold and the second mold is also reduced at the time of mold clamping. There is a possibility that the repeated mold may be partially worn at the position. However, if the thickness of the clamp is substantially the same as the distance between the first mold and the second mold during clamping, the first mold and the second mold will also abut against the clamp during clamping. Since the area of the portion held by the first mold and the second mold is increased, uneven wear of the mold can be prevented.

The eighth characteristic configuration of the mold for manufacturing a resin product according to the present invention lies in that the clamp has a rounded peripheral edge of the surface portion contacting the outer portion of the insert member.

As in this configuration, when the clamp has a rounded peripheral edge of the surface part that contacts the outer side of the insert member, the clamp's peripheral edge is the surface of the insert member when the clamp holds the outer side of the insert member. Therefore, the outer portion of the insert member can be prevented from being damaged. Therefore, a good resin molded product can be produced without damaging the outer portion of the insert member even when the clamp comes into contact.

Sectional drawing which shows the molding process of the resin molded product which concerns on Embodiment 1. The perspective view of the insert member concerning Embodiment 1. The figure which shows the resin molded product in Embodiment 1. The perspective view of the insert member concerning Embodiment 2. The figure which shows the resin molded product in Embodiment 2. The perspective view of the insert member concerning Embodiment 2. The figure which shows the resin molded product in Embodiment 2. Sectional drawing which shows the molding process of the resin molded product which concerns on Embodiment 3. The perspective view of the insert member concerning Embodiment 3. Sectional drawing which shows the molding process of the resin molded product which concerns on Embodiment 4. Sectional drawing which shows the molding process of the resin molded product which concerns on Embodiment 4. The perspective view of the insert member concerning Embodiment 4. Sectional drawing which shows the molding process of the resin molded product which concerns on Embodiment 5. Sectional drawing which shows the molding process of the resin molded product which concerns on Embodiment 7. The perspective view of the insert member concerning Embodiment 7. Sectional drawing of the molding process of the resin molded product according to Embodiment 8 Sectional drawing of the molding process of the resin molded product according to Embodiment 8 The perspective view of the insert member concerning other embodiments Sectional drawing which shows the molding process of the resin molded product which concerns on other embodiment. The figure which shows the resin molded product which concerns on other embodiment Cross-sectional view showing the molding process of a resin molded product according to another embodiment Cross-sectional view showing the molding process of a resin molded product according to another embodiment The elements on larger scale of the cross-sectional view which show the molding process of the resin molded product which concerns on other embodiment The figure which shows arrangement | positioning of the clamp of the metal mold | die for resin product manufacture concerning other embodiment. The figure which shows arrangement | positioning of the clamp of the metal mold | die for resin product manufacture concerning other embodiment. The figure which shows the resin molded product which concerns on other embodiment 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 relates to a resin molded product 8 that is embedded in the resin portion with a part of the insert member 4 exposed, and that has a decorative film on the surface of the resin portion, and its manufacture. The 1st metal mold | die 1 and the 2nd metal mold | die 2 are shown.

[Embodiment 1] In order to obtain a resin molded product 8 in which a part of the insert member 4 is exposed on the surface and a decorative layer is provided on the surface of the resin portion 7, a resin mold is formed as shown in FIG. A first mold 1 and a second mold 2 are used. 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 part of the resin molded product 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 is discharged from being mixed into the resin molded product to be manufactured next. . 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 shape of the insert member 4 embedded in the resin portion 7 in a partially exposed state is not limited, but there is a locking portion 4A that engages with the resin portion 7 in a direction perpendicular to the front and back direction of the resin molded product. Is provided. For example, as shown in FIGS. 1 and 2, the locking portion 4 A is formed in a hook shape on the outer periphery of the insert member 4. Although the shape of these latching | locking part 4A and the position in the insert member 4 are not specifically limited, For example, as shown in FIG. As a result, the volume of the insert member can be reduced and the insert member can be configured with a high yield.

The decorative film 20 is a film on which a pattern is printed. A pattern printed on the decorative film 20 is transferred onto the resin surface simultaneously with the molding of the resin molded product 8, and a decorative layer is formed on the surface of the resin portion 7 of the resin molded product 8.

The first mold 1 is provided with a positioning pin that is a holding portion 10 for the insert member. This positioning pin is engaged with a recess 4b provided at a portion opposite to the exposed side of the insert member 4, and the insert member 4 is positioned.

In the state where the first mold 1 and the second mold 2 are opened, the decorative film 20 is disposed along the second mold 2. Subsequently, the insert member 4 is positioned as described above, and the insert member 4 is sucked and held using the suction mechanism (passage 11 provided in the first mold 1), and the

molds

1 and 2 are closed. . Here, if the processing accuracy of the insert member 4 is high and the thickness of the insert member 4 and the thickness of the cavity formed by the first mold 1 and the second mold 2 are the same, the decorative film 20 and the insert are inserted into the cavity. After arranging the member 4, the first mold 1 and the second mold 2 are clamped. Thereby, the insert member 4 is pressed by the 2nd metal mold | die 2 side, and a predetermined position is hold | maintained.

In a state where the insert member 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. Thereby, the insert member 4 is embedded in the resin part 7 in a state where a part thereof is exposed from the resin part 7, and the resin molded product 8 as shown in FIG. Molded. In this case, the entire back side of the insert member 4 becomes a thickness direction position determining portion 4C that is disposed at a predetermined position of the second mold 2 that forms the surface of the insert member on the surface of the resin molded product during resin molding.

The molded resin molded article 8 has an insert member 4 exposed at a part of the surface, and has excellent design properties. The engaging portion 4A on the outer peripheral portion of the insert member 4 is securely engaged with the resin portion 7 and has high adhesion, and when the insert member 4 is made of metal, the durability of the resin molded product is also improved. .

[Embodiment 2]
In the said Embodiment 1, although illustrated about the resin molded product which embeds a flat plate-shaped insert member, as shown in FIG. 4, as shown in FIG. Such a resin molded product 8 can also be molded. Further, as shown in FIG. 6, by providing a hook-like locking portion 4B inside the ring-shaped insert member 4 and filling the resin inside the ring-shaped insert member 4, as shown in FIG. The resin molded product 8 can also be molded.

[Embodiment 3]
When the processing accuracy of the insert member 4 is low, for example, when the thickness of the insert member 4 is equal to or less than the set thickness due to processing errors, a space is generated between the mold and the insert member 4. For this reason, the resin may be inserted into the space and a resin burr may be generated. In this case, as shown in FIG. 8, such a problem can be solved by pressing the insert member 4 against the second mold 2 using the pressure of the resin to be filled.

As shown in FIGS. 8 and 9, the surface on the first mold 1 side is configured to be larger than the surface on the second mold 2 side with respect to the hook-shaped locking portion 4 A formed on the insert member 4. That is, the surface on the first mold 1 side was formed as an umbrella-shaped inclined surface. This inclined surface becomes the resin pressing portion 5 on which the insert member 4 is pressed by the resin.

As in the first embodiment, the decorative film 20 is inserted into the cavity formed by the first mold 1 and the second mold 2, and the insert member 4 is positioned. The insert member 4 is sucked and held in the first mold 1 by a suction mechanism provided on the first mold 1 side. In this state, the first mold 1 and the second mold 2 are clamped. When the mold clamping is completed, the suction of the suction mechanism is released. Thereby, the insert member 4 cannot move in a direction perpendicular to the approach / separation direction with respect to the second mold 2, and can move only in the approach / separation direction.

Subsequently, as shown in FIG. 8, the resin is filled into the cavity 3 from the resin injection gate 6 provided in the first mold 1. At this time, the pressure of the resin injected into the inclined surface of the resin pressing portion 5 acts, and the insert member 4 is strongly pressed against the second mold 2 side (arrow direction). Therefore, even if there is a thickness error in the insert member 4 and a space is generated between the insert member 4 and the second mold 2, resin is inserted between the insert member 4 and the second mold 2. No penetration and no resin flash. As a result, the insert member 4 is exposed at a predetermined position, and a resin molded product having a decorative layer on the resin portion can be manufactured.

[Embodiment 4]
Instead of the insert member 4 used in the third embodiment, as shown in FIG. 10, a resin molded product can be molded using the ring-shaped insert member 4. Further, as shown in FIGS. 11 and 12, a ring-shaped insert member 4 having a hook-shaped locking portion 4B inside is used, and a resin molded product in which resin is filled in the ring-shaped insert member 4 is molded. You can also When the resin is filled in the ring-shaped insert member 4, the resin pressing portion 5 needs to be provided in the ring-shaped insert member 4.

[Embodiment 5]
If the thickness of the insert member 4 is equal to or less than the set thickness due to a processing error, FIG. 13 shows how the insert member 4 is pressed against the second mold 2 side. That is, here, the urging means 13 is used to press the insert member 4 directly against the second mold side. The holding portion 10 of the insert member 4 includes an engagement member 12 that can be engaged with a part of the back side of the insert member 4, and an urging means 13 that is connected to the engagement member 12 and the first mold 1. Prepare. The urging means 13 can urge the insert member 4 to the second mold side via the engaging member 12.

When the first mold 1 and the second mold 2 are clamped, the engaging member 12 and a part of the back side of the insert member 4 are in contact with each other, and the biasing means 13 holds the insert member 4 through the engaging member 12. Energize to the second mold side. Thereby, the insert member 4 is pressed against the second mold 2 side. Therefore, when there is an error in the thickness of the insert member, the exposed portion 4a of the insert member 4 can be stably pressed against the second mold 2 side, the insert member 4 is exposed at a predetermined position, and the resin portion A resin molded product provided with a decorative layer can be obtained.

[Embodiment 6]
Although the ring-shaped insert member 4 is used in the fifth embodiment, the insert member 4 may have no cavity inside the insert member 4 as shown in FIG. Moreover, as shown in FIG. 6, it can utilize also for the metal mold | die which uses the ring-shaped insert member 4 provided with the hook-shaped latching | locking part 4B inside, and shape | molds the resin molded product which filled resin inside.

[Embodiment 7]
In order to press the insert member 4 against the second mold 2, a part of the insert member 4 is cut away to form a notch 9, and the gate 6 is inserted so that the resin is directly injected into the notch 9. You may arrange. For example, as shown in FIGS. 14 and 15, the insert member 4 has a notch 9 formed by cutting a part of the outer periphery. A resin injection gate 6 is provided in the first mold 1, and the gate 6 is arranged to face the back side of the insert member 4.

By forming the notch portion 9, a wide space between the insert member 4 and the inner wall surface of the first mold 1 can be secured. As shown in FIG. 14, the insert member 4 is positioned in the mold, the decorative film 20 is disposed to close the mold, and the resin is injected into the notch 9 from the gate 6. The pressure of the resin injected into the space area of the notch 9 directly acts on the notch 9 and presses the insert member 4 against the second mold 2 side. In this way, the penetration of the resin between the second mold 2 and the insert member 4 is prevented, and the occurrence of resin burrs is avoided. The insert member 4 is exposed at a predetermined position, and a resin molded product having a decorative layer on the resin portion can be manufactured.

[Embodiment 8]
Instead of the insert member 4 used in the seventh embodiment, as shown in FIG. 16, a resin molded product can be molded using the ring-shaped insert member 4. In addition, as shown in FIG. 17, a ring-shaped insert member 4 having a hook-shaped locking portion 4 A inside may be used to mold a resin molded product in which resin is filled in the ring-shaped insert member 4. it can.

[Other Embodiments]
(1) In the first to eighth embodiments, the insert member 4 has a circular shape as a whole, but is not limited to a circular shape. For example, as shown in FIG. 18, the insert member 4 having a rectangular shape as a whole can be used. The insert member 4 has exposed portions 4 a on the left and right sides of one surface, and an intermediate portion sandwiched between the left and right exposed portions 4 a is formed in a concave shape and embedded in the resin portion 7. Using this insert member 4, as shown in FIG. 19, the resin molded product shown in FIG. 20 can be obtained by mold-clamping to a mold and injection molding. The shape and position of the engaging portion 4A on the outer periphery of the insert member 4 are not particularly limited as in the above embodiment. Further, as shown in FIG. 18, the locking portion 4 A may be provided on the entire outer periphery of the insert member 4 or may be provided on a part of the outer periphery.

(2) In the first to eighth embodiments, only the printed pattern of the decorative film 20 is transferred to the resin surface, and the film itself does not remain on the resin surface. However, the decorative film 20 used in the resin molded product according to the present invention is not limited to this, and may be one in which the decorative film 20 is directly bonded to the resin surface to provide a decorative layer.

(3) As the insert member 4 of the resin molded product according to the present invention, as shown in FIGS. 21 to 23, a frame-like insert member 4 having a deep aperture may be used. In this case, the resin is injected into the cavity 3 inside the insert member 4 to manufacture a resin molded product 8 as shown in FIG. In the present embodiment, the thickness direction position determination unit 4 C is the back side of the portion of the insert member 4 sandwiched between the first mold 1 and the second mold 2, and the insert member of the first mold 1. The holding part 4 is a part facing the thickness direction position determining part 4C.

The first mold 1 may further be provided with a clamp 15 that holds the insert member 4 during mold clamping. The clamp 15 is appropriately moved in either one of the mold clamping direction and the direction perpendicular to the mold clamping direction to contact and hold the outer side of the insert member 4, and the insert to the first mold 1 It moves to a retracted position that does not interfere with the arrangement of the member 4. For example, as shown in FIG. 24, the clamp 15 may be provided on two opposite sides when the periphery of the insert member 4 is rectangular, or the entire circumference of the insert member 4 is held as shown in FIG. 25. It may be provided in a frame shape. Although not shown, the clamps 15 may be provided in a state of being divided with respect to the entire circumference of the insert member 4 or may be scattered around the insert member 4. In short, the clamp 15 may be provided so that the insert member 4 can be held and positioned in the first mold 1. When the frame-shaped clamp 15 is used, the clamp 15 is moved only in the mold clamping direction.

A procedure for manufacturing a resin molded product using the clamp 15 will be described below.
The clamp 15 provided in the first mold 1 is configured to be movable in a direction perpendicular to the mold clamping direction, for example. As shown in FIG. 21, with the mold opened, the clamp 15 is moved to the retracted position outside the position where the insert member 4 of the first mold 1 is disposed, and then the insert member 4 is attached to the first mold 1. Place. Next, the clamp 15 in the retracted position is moved to a position for holding the outer portion of the insert member 4, and the insert member 4 is positioned on the first mold 1. Thereafter, as shown in FIG. 22, the mold is clamped and the resin is injected into the formed cavity 3. After the resin is solidified, the mold is opened, and the clamp 15 in a position for holding the outer portion of the insert member 4 is moved to the retracted position, and the resin molded product 8 is taken out from the first mold 1.

During mold clamping, the outer part of the insert member 4 is held by a clamp 15 provided in the first mold 1, and the decorative film 20 is disposed along the shallow cavity surface of the second mold 2. Yes. Therefore, the decorative film 20 and the outer part of the insert member 4 do not contact. Therefore, even if the outer side of the insert member 4 is deep-drawn, the decorative film 20 is not rubbed against the outer side of the insert member 4 and the second mold 2 during mold clamping.

The material of the clamp 15 is not particularly limited, but is preferably a softer material than the insert member 4. In this way, the impact force applied when the clamp 15 contacts the insert member 4 is partially absorbed by the clamp 15 which is a softer material than the insert member 4, and the insert member 4 and the clamp 15 are made of the same material. Smaller than that. Therefore, the possibility that the insert member 4 is deformed by an impact at the time of contact of the clamp 15 is reduced.
Here, when the area of the thickness direction position determining portion 4C of the insert member 4 is small, the area of the portion held by the first mold 1 and the second mold 2 is also reduced when the mold is clamped. There is a possibility that the mold that repeats the mold opening and wear will be unevenly worn at this position. However, if the thickness of the clamp 15 is substantially the same as the distance between the first mold 1 and the second mold 2 during mold clamping, the first mold 1 and the second mold 2 are used during mold clamping. Since the area of the part which contacts the clamp 15 and is held by the first mold 1 and the second mold 2 is increased, uneven wear of the mold can be prevented.

As shown in FIG. 23, it is desirable that the clamp 15 has a rounded peripheral edge 15A of the surface portion that contacts the outer portion of the insert member 4. Thus, when the clamp 15 holds the outer portion of the insert member 4, the peripheral edge 15 A of the clamp 15 does not locally contact the surface of the insert member 4, and the outer portion of the insert member 4 is damaged. It can be prevented from sticking.

The resin molded product according to the present invention includes both the exposed surface of the insert member and the decorated resin surface, and can be used for various exterior products having excellent design properties.

Claims

Part of the resin part is embedded in the resin part with the part exposed from the resin part, and at least part of the part embedded in the resin part is engaged with the resin part in a direction perpendicular to the front and back direction of the resin molded product. With an insert member provided with a locking part to be
Provided with a decorative layer on the surface of the resin part,
A resin molded product provided with a thickness direction position determining portion on the back side of the insert member for arranging the surface of the insert member at a predetermined position of a molding die for forming the surface of the resin molded product during resin molding.
The resin molded product according to claim 1, wherein the thickness direction position determining portion is a pressing portion that causes a pressing force by the resin to act on the back side of the insert member during resin molding.
The resin molded product according to claim 2, wherein the pressing portion is an inclined surface formed on the back surface of the insert member.
The resin molded product according to claim 2, wherein the pressing portion is a cutout portion formed by cutting a part of the back surface of the insert member.
In order to obtain a resin molded product in which at least a part of the insert member is embedded in the resin,
A first mold having a holding portion for holding the insert member;
The mold is clamped with the first mold while holding the decorative film, and a second cavity for forming a resin is formed between at least a part of the insert member and between the first mold and the decorative film. Mold for manufacturing resin products with a mold.
The holding portion holds the insert member so as not to move in the direction perpendicular to the mold clamping direction of the first mold and the second mold, and is slidable and slidable along the mold clamping direction. The mold for manufacturing a resin product according to claim 5, wherein the mold is configured to be able to be switched and held in an impossible state.
The holding portion includes an engagement member that can engage with a part of the insert member, and the insert member can be biased toward the second mold via the engagement member. The mold for manufacturing a resin product according to claim 6, further comprising an urging unit coupled to an engagement member and the first mold.
The resin product manufacturing mold according to claim 6, wherein the first mold is provided with a gate for resin injection, and the gate is arranged so as to face the back surface of the insert member.
6. The mold for manufacturing a resin product according to claim 5, wherein the first mold is provided with a clamp for holding at least a part of an outer portion of the insert member when the mold is clamped.
The mold for manufacturing a resin product according to claim 9, wherein the clamp is movable in a direction perpendicular to a clamping direction.
The mold for manufacturing a resin product according to claim 9 or 10, wherein the clamp is made of a softer material than the insert member.
The mold for manufacturing a resin product according to any one of claims 9 to 11, wherein the clamp has a rounded peripheral edge of a surface portion that contacts the outer side portion of the insert member.