JP2013158975A - Mold for injection molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a leather-mimic resin molded article in which the color tone of a base material part and the color tone of a yarn of a seam are changed.SOLUTION: A seam position 3 is injection molded between a movable mold 10 and a first fixed mold 11 equipped with a fine line face 26 for forming a fine line on the surface of the seam position 3, and a base material position 2 is injection molded between a movable mold 10 in which the seam position 3 is left and a second fixed mold 12, and a resin part, having the seam position 3 on the surface of which the fine line is formed, is injection molded by a two color molding.

Description

  The present invention relates to an injection mold for performing two-color molding for molding a resin part having a seam portion formed of a different resin on a resin base material.

  Various interior parts made of leather are applied as interior parts of vehicles (see, for example, Patent Document 1). The leather interior product can be made to correspond to the shape of the base material by sewing a plurality of pieces of leather according to the size and shape of the base material. In this case, the design can be improved by changing the color of the leather and the color of the thread of the seam.

  In recent years, with the advance of molding technology, it has been considered to use a resin molded product in a state of simulating leather as an interior product of a vehicle. However, when resin molded products are used, advanced technology is required to produce a mold that can simulate even the texture of leather, and the seam must be expressed with unevenness using the same resin. It was the current situation. For this reason, it is difficult to reach a level for recognizing leather, and the actual situation is that it is not yet ready for use as an interior product simulating leather.

  On the other hand, in the field of injection molding, key tops and the like for various inputs of electronic related devices are applied with molded products (two-color molding) in which the base material and graphic part or character display part are molded with different types of resins. It is known (see, for example, Patent Document 2).

JP 2010-89696 A JP 7-329111 A

  The present invention has been made in view of the above situation, and an object thereof is to provide an injection mold capable of molding a resin part formed with a different resin seam portion with respect to a resin base material by two-color molding. And

  In order to achieve the above object, an injection mold according to the present invention according to claim 1 includes a first mold and a second mold, and a common mold that performs molding between the first mold and the second mold. A seam portion of the first resin is injection-molded between the common mold and the first mold, and a second portion is formed between the common mold and the second mold in a state where the seam portion is left. An injection mold for injection molding a base material part with resin and molding a molded product member having a seam part with respect to the base material part in two colors, wherein the first mold includes a surface of the seam part Is provided with a thread surface for forming the thread.

  In the present invention according to claim 1, a thread can be formed on the surface of the seam portion of the first resin by the thread surface, and a thread is formed on the surface of the second resin base material portion using a different first resin. A resin part having a stitched portion can be formed by two-color molding. For this reason, a resin molded product simulating leather can be obtained in a state where the color of the base material portion and the color of the thread of the seam are changed.

  According to a second aspect of the present invention, there is provided an injection mold according to the first aspect of the present invention, wherein the seam portion is formed with a large number of continuous thread portions where the stitches are formed. The common die is provided with a steal forming portion for forming a stealing portion on the back side of the thread portion, and the groove forming portion for forming a groove between the yarn portions is provided in the first die. .

  In the present invention according to claim 2, a stealing portion is formed on the back side of the yarn portion, and a groove is formed between the yarn portions, so that the shape of the yarn portion formed in succession is stabilized. be able to.

  An injection mold according to a third aspect of the present invention is the injection mold according to the second aspect, wherein a sinking surface is formed in the base material portion of the portion that contacts a large number of the thread portions. The sink surface forming portion is provided in the second mold.

  In this invention which concerns on Claim 3, since a sinking surface is formed in the base-material site | part of the site | part which contacts a thread part, the appearance of the base-material site | part provided with the seam part can be improved.

  The injection mold according to claim 4 is the injection mold according to any one of claims 1 to 3, wherein the first mold and the second mold are: A mold on a fixed side to which resin is supplied, and the common mold is provided so as to be capable of clamping and opening with respect to the first mold and the second mold, and the common mold is the first mold A pair is provided corresponding to the mold and the second mold, and is provided so as to be rotatable in a state corresponding to the first mold and the second mold alternately.

  In the present invention according to claim 4, a molded product member having a seam portion in which a stitch is formed with respect to the base material portion is obtained by interlocking a pair of common mold clamping and opening operations and a turning operation. It can be molded continuously.

  The injection mold of the present invention can mold a resin part in which different resin seam portions are formed on a resin base material by two-color molding.

It is an external view of the resin component shape | molded with the injection die which concerns on one Example of this invention. It is a disassembled perspective view of the resin component shape | molded with the injection die which concerns on one Example of this invention. It is a principal part enlarged view in FIG. It is sectional drawing in FIG. It is a principal part external view of the injection mold which concerns on one Example of this invention. It is a principal part external view of the injection mold which concerns on one Example of this invention. It is sectional drawing of the metal mold | die for injection molding which concerns on one Example of this invention. It is sectional drawing of the metal mold | die for injection molding which concerns on one Example of this invention. It is operation | movement explanatory drawing of the injection die which concerns on one Example of this invention.

  A resin component molded with an injection mold according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the appearance of the resin part, FIG. 2 shows an exploded perspective view of the resin part, FIG. 3 shows an enlarged state showing a seam portion, and FIG. 4 shows a cross section in FIG.

  As shown in FIGS. 1 and 2, the resin component 1 is a resin molded product simulating leather, and is used as, for example, a vehicle interior component. The resin component 1 is a resin molded product in which a seam portion 3 of a different color is present with respect to the base material portion 2 as a base. A large number of thread portions 4 are continuously formed at the seam portion 3, and thread lines 5 are formed on the surface of the thread portion 4.

  As shown in FIG. 3 and FIG. 4, the stitch part 3 is formed with a large number of continuous thread parts 4 formed with thread lines 5, and a stealing part 6 (hollow part) is formed on the back side of the thread part 4. Yes. The presence of the hollow portion 6 on the back side of the yarn portion 4 makes it possible to stabilize the shape of the yarn 5 of the yarn portion 4. A groove 7 is formed between the thread portions 4 of the seam portion 3. By interposing the groove 7 between the thread portions 4, the shape of the seam portion 3 can be stabilized even if the surface of the resin component 1 is curved.

  As shown in FIG. 1, FIG. 3, and FIG. 4, a sinking surface 8 is provided in the base material portion 2 that is in contact with the thread portion 4. That is, the surface of the base material part 2 around the thread part 4 is recessed by the sinking surface 8 compared to the other parts, the leather sheet is sewn together, and the seam part is sunk by the thread. It has become.

  For this reason, the resin component which has the seam part 3 (thread part 4) in which the thread 5 was formed on the surface can be shape | molded by two-color molding. For this reason, the resin component 1 simulating leather can be obtained in a state where the hue of the portion of the base material portion 2 and the hue of the stitch portion 4 are changed.

  An injection mold according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 5 shows the appearance of an injection molding die representing the mold surfaces of two movable molds (movable molds) as a common mold, and FIG. 6 shows a first fixed mold and a first mold as a first mold. FIG. 7 shows an appearance of an injection mold representing mold surfaces of a mold (first fixed mold) and a second mold (second fixed mold). FIG. 7 shows a state where the first fixed mold and the movable mold are clamped. FIG. 8 shows a cross section in a state where the second fixed mold and the movable mold are clamped. FIG. 9 shows a schematic process for explaining the operation state of the injection mold.

  As shown in FIG. 5, the injection mold according to the present embodiment includes two movable molds 10 on the movable side connected to the mold clamping driving means, the first fixed mold 11 and the second fixed mold 11 on the fixed side to which the resin is pumped. And a fixed mold 12. A seam part 3 is formed between one movable mold 10 and the first fixed mold 11, and the seam part 3 is left between the other movable mold 10 and the second fixed mold 12 (the seam part 3 is a gold plate). The substrate part 2 is shaped (in the mold surface). The two movable molds 10 are provided so as to be rotatable, and the molding of the seam part 3 (primary molding) and the molding of the base part 2 (secondary molding) with the seam part 3 being the mold surface are continuous. Done.

  Each of the pair of movable molds 10 is provided with a movable mold member 21, and the cavity of the seam portion 3 is formed in the movable mold member 21. The cavity of the movable mold member 21 is provided with a stealing projection 22 as a stealing part forming part for forming the stealing part 6 (see FIG. 4) on the back side of the thread part 4 (see FIG. 2). The first fixed mold 11 and one movable mold 10 face each other, and the second fixed mold 12 and the other movable mold 10 in a state where the seam portion 3 is a mold surface face each other.

  As shown in FIG. 6, the first fixed mold 11 is provided with a first fixed mold member 25, and the first fixed mold member 25 is formed with a cavity of the seam portion 3. The cavity of the first fixed mold member 25 is provided with a thread surface 26 for forming the thread 5 (see FIG. 3) and a protrusion 27 as a groove forming part for forming the groove 7 (see FIG. 3). .

  The second fixed mold 12 is provided with a second fixed mold material 28, and the second fixed mold material 28 is formed with a cavity of the base material part 2. The cavity of the second fixed mold member 28 is provided with a convex portion 29 as a sinking surface forming portion for forming the sinking surface 8 (see FIG. 4).

  As shown in FIG. 7, on the opposite side of the first fixed mold member 25 of the first fixed mold 11, there is provided a first resin supply port 31 into which a nozzle for supplying resin at the seam portion 3 is fitted. . The first fixed mold 11 is provided with a first resin path 32 that connects the first resin supply port 31 and the cavity of the seam portion 3. When the first fixed mold 11 and the movable mold 10 are clamped and the resin is supplied from the first resin supply port 31, the resin is sent to the cavity through the first resin path 32, and the seam part 3 is formed. The

  As shown in FIG. 8, on the opposite side of the second fixed mold material 28 of the second fixed mold 12, there is provided a second resin supply port 35 into which a nozzle for supplying the resin of the substrate part 2 is fitted. Yes. The second fixed mold 12 is provided with a second resin path 36 that connects the second resin supply port 35 and the edge of the base material part 2. The second fixed mold 12 and the movable mold 10 are clamped with the seam portion 3 formed on the movable mold 10, and the resin is supplied from the second resin supply port 35, thereby passing through the second resin path 36. Then, the resin is sent to the cavity, and the base material portion 2 is molded in accordance with the stitch portion 3.

  By using the above-described injection mold, the first fixed mold 11, the second fixed mold 12 and the pair of movable molds 10 are clamped together and the pair of movable molds 10 are swung in an interlocked manner, so that the seams are formed. The molding of the part 3 (primary molding) and the molding of the base material part 2 (secondary molding) in a state where the seam part 3 is a mold surface can be continuously performed.

  That is, as shown to Fig.9 (a), the seam site | part 3 is shape | molded between one movable mold | type 10 and the 1st fixed mold | type 11 (refer FIG. 6) (primary shaping | molding). As shown in FIG. 9B, the pair of movable molds 10 are turned, and the one movable mold 10 formed with the seam portion 3 is opposed to the second fixed mold 12 (see FIG. 6). The other movable mold 10 faces the first fixed mold 11 (see FIG. 6).

  As shown in FIG. 9C, the base part 2 is formed on the movable mold 10 with the seam part 3 left (secondary forming), and the movable part 10 is opposed to the first fixed mold 11 (see FIG. 6). A stitch portion 3 is formed on the mold 10. As shown in FIG. 9D, the resin part 1 (see FIG. 1) in which the seam part 3 and the base part 2 are formed is taken out, and the state shown in FIG. 9A is obtained.

  The above operations are repeated to continuously form the seam part 3 (primary molding) and the base part 2 in the state where the seam part 3 is a mold surface (secondary molding), The resin component 1 is continuously molded.

  By using the above-described injection mold, the resin part 1 simulating leather can be obtained in a state where the hue of the base portion 2 and the hue of the thread portion 4 are changed.

  In other words, the injection mold described above includes a stealing protrusion 22 for forming the stealing part 6 on the back side of the thread part 4 in the movable mold 10, and a protrusion 27 for forming a groove 7 between the thread parts 4. Is provided in the first fixed mold 11, so that a stealing portion 6 is formed on the back side of the thread portion 4, and a groove 7 is formed between the thread portions 4. The shape of the part 4 can be stabilized.

  Further, since the second fixed mold 12 is provided with the convex portion 29 for forming the sinking surface 8 in the base material portion 2 that is in contact with a large number of thread portions 4, the base material portion in the portion that is in contact with the thread portions 4 The sinking surface 8 will be formed in 2 and the appearance of the base-material site | part 2 in which the continuous thread part 4 was provided can be improved.

  It is also possible to express the first sewing thread (common name: in-stitch) as the sewing thread.

  INDUSTRIAL APPLICATION This invention can be utilized in the industrial field | area of the injection mold which performs the two-color molding for shape | molding the resin component in which the site | part of the seam was formed with the different resin with respect to the resin base material.

DESCRIPTION OF SYMBOLS 1 Resin part 2 Base part 3 Stitch part 4 Thread part 5 Thread 6 Stealing part 7 Groove 8 Sinking surface 10 Movable type 11 1st fixed type 12 2nd fixed type 21 Movable type material 22 Stealing protrusion 25 1st fixed type material 26 Thread surface 27 Protrusion 28 Second Fixed Mold Material 29 Convex Site 31 First Resin Supply Port 32 First Resin Path 35 Second Resin Supply Port 36 Second Resin Path

Claims (4)

A first mold and a second mold, and a common mold for molding between the first mold and the second mold,
Injection molding a seam portion with a first resin between the common mold and the first mold;
Injection-molding a base material part with a second resin between the common mold and the second mold in a state where the seam part is left;
An injection mold for two-color molding of a molded product member having a seam portion with respect to a base material portion,
The mold for injection molding, wherein the first mold is provided with a thread surface for forming a thread on a surface of a seam portion. In the injection mold according to claim 1,
The seam part is formed with a large number of continuous thread parts where the thread is formed,
The common mold is provided with a steal forming portion for forming a steal portion on the back side of the thread portion,
A mold for injection molding, wherein the first mold is provided with a groove forming portion for forming a groove between the thread portions. In the injection mold according to claim 2,
An injection mold, wherein the second mold is provided with a sunk surface forming part that forms a sunk surface in the base material part of the part that contacts a large number of the thread parts. The injection mold according to any one of claims 1 to 3,
The first mold and the second mold are fixed molds to which resin is supplied,
The common mold is provided so as to be capable of clamping and opening with respect to the first mold and the second mold.
The common mold is provided in a pair corresponding to the first mold and the second mold, and is provided so as to be rotatable in a state corresponding to the first mold and the second mold alternately. Injection mold.

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