JP2005231237A - Injection mold assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a car trim product having a skin of at least two colors stably divided in the color boundary thereof, incapable of seeing a core material and stable from an aspect of appearance quality. <P>SOLUTION: In the method for manufacturing the car trim product by installing the core material in a mold and injection-molding a liquid resin in the gap between the mold and the core material to form the skin on the surface of the core material and injecting molten resins different in color from the mutually opposed sides of the core material, a lift block 50, of which the leading end 8 is made acute in angle, is provided to the mold to intercept the molten resin to form the skin different in color on the core material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a car interior product having a stable appearance quality by dividing color boundaries stably in a car interior product having a skin of at least two colors.

Conventionally, as shown in Patent Document 1, a two-color molded product of an automobile interior product is installed such that a block protrudes into a cavity in a mold, the block is used as a weir, and a liquid resin is dammed up. It was classified into two colors. However, in the method shown in Patent Document 1, since the upper surface of the block is flat, the liquid resin may not be completely dammed, and the boundary line for two colors is stable for each product. It wasn't something.
Conventionally, since the liquid resin on both sides of the weir is hardened while protruding the weir, the groove of the weir remains deep on the product surface side, and the core material at the bottom of the groove is visible from the surface.
JP 2003-127174 A

The present invention has been made in view of the above problems, and provides a method of manufacturing an interior product for an automobile having a skin of at least two colors that is stable in appearance quality and stably separates color boundaries and does not show a core material. The purpose is to provide.

The invention according to claim 1, which solves the above-mentioned problem, manufactures an automobile interior product in which a core material is installed in a mold and molten resin is injected into a gap between the mold and the core material to form a skin on the surface of the core material. In a method for manufacturing an automotive interior product in which molten resins of different colors are injected from opposite sides of a core material, a core is provided by providing a dam with a sharp tip at the tip to stop the molten resin. It exists in the manufacturing method of the interior product for motor vehicles which forms the skin which differs in color on a material.

Invention of Claim 2 exists in the manufacturing method of the interior goods for motor vehicles of Claim 1 which inject | pour molten resin in the state which inserted the said weir in the core material.

Invention of Claim 3 exists in the manufacturing method of the interior goods for motor vehicles of Claim 1 or 2 which used the said weir as the raising / lowering block which is movable.

According to a fourth aspect of the present invention, there is provided the method for producing an automobile interior product according to any one of the first to third aspects, wherein the resin is a thermosetting liquid resin.

Invention of Claim 5 is a manufacturing method of the interior product for motor vehicles which installs a core material in a metal mold | die, inject | pours molten resin into the clearance gap between a metal mold | die and a core material, and forms a skin on the core material surface, In the manufacturing method of interior parts for automobiles, in which molten resins of different colors are injected from the opposite sides of the core material, when the molten resin is injected from one end side of the core material, a mold different from the mold in which the core material is installed The lifting block with a sharp tip at the tip is moved to the core material side, the tip of the lifting block is inserted into the core material, the molten resin is injected, and after the molten resin has hardened, the lifting block is moved backward, The present invention is in a method for manufacturing an interior product for an automobile in which molten resins of different colors are injected from the other end of the material and cured.

A sixth aspect of the present invention resides in the method of manufacturing an automobile interior product according to the fifth aspect, wherein the resin is a thermosetting resin.

  The invention described in claim 1 is a method of manufacturing an interior product for an automobile, in which a core material is installed in a mold and molten resin is injected into a gap between the mold and the core material to form a skin on the surface of the core material. In a method for manufacturing interior parts for automobiles, in which molten resins of different colors are injected from opposite sides of the core material, a dam with a sharp edge at the tip is provided in the mold, and the molten resin is dammed. Because it is a method of manufacturing automotive interior parts that form different skins, weirs with sharp edges are used, so molten resin can be completely dammed and colors can be divided at any location Is possible.

  Since invention of Claim 2 is a manufacturing method of the interior goods for motor vehicles of Claim 1 which inject | pour molten resin in the state which inserted the said weir in the core material, In addition to the effect of Claim 1 The molten resin can be blocked more reliably.

  Since invention of Claim 3 is a manufacturing method of the interior goods for motor vehicles of Claim 1 or 2 which used the said weir as a movable raising / lowering block, molten resin was first inject | poured and hardened. The rear lifting block can be retracted.

  The invention according to claim 4 is applicable to the RIM skin molding method because the resin is a thermosetting liquid resin, and is the method for manufacturing an automotive interior product according to any one of claims 1 to 3. .

  Invention of Claim 5 is a manufacturing method of the interior product for motor vehicles which installs a core material in a metal mold | die, inject | pours molten resin into the clearance gap between a metal mold | die and a core material, and forms a skin on the core material surface, In the manufacturing method of interior parts for automobiles, in which molten resins of different colors are injected from the opposite sides of the core material, when the molten resin is injected from one end side of the core material, a mold different from the mold in which the core material is installed The lifting block with a sharp tip at the tip is moved to the core material side, the tip of the lifting block is inserted into the core material, the molten resin is injected, and after the molten resin has hardened, the lifting block is moved backward, Since it is a manufacturing method of interior parts for automobiles characterized by injecting and curing molten resins of different colors from the other end side of the material, the core material is not visible from the skin side at the boundary of the color. The interface is stable and the color can be divided at any place

  The invention according to claim 6 is applicable to the RIM skin molding method because the resin is a thermosetting resin and is the method for manufacturing an automobile interior product according to claim 5.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall side view showing a manufacturing apparatus used in the method for manufacturing a two-color molded product according to the present invention. FIG. 2 is an explanatory view showing a molding process of a two-color skin in one embodiment of a method for producing a two-color molded article according to the present invention. As shown in FIG. 1, the manufacturing apparatus 10 includes a molding upper mold 20 that can move up and down by a predetermined stroke, a molding lower mold 30 that is paired with the molding upper mold 20, and two injection heads 40 and 41 that are connected to the molding lower mold 30. It is generally composed of a lifting block 50 provided on a molding lower mold 30 that can mold two-color skins separately.

  In FIG. 2, the upper and lower blocks 50 have an acute upper surface on the side of the molding upper mold 20, and before the first RIM urethane M <b> 1 is molded, the lifting block 50 is inserted into the core material 5 installed in the molding upper mold 20. deep. Then, the first RIM urethane M <b> 1 is injected from the injection head 41 with the lifting block 50 inserted into the core material 5. Then, after the first RIM urethane M1 is cured, the elevating block 50 is retracted to the molding lower mold 30 side, and a space 7 for entering the second RIM urethane M2 having a color different from that of the first injected RIM urethane is formed. Keep it. Thereafter, the second RIM urethane M2 is injected and cured (FIG. 3). Thereafter, the elevating block 50 is completely lowered, and the automobile interior product to which the two-color skin is attached is removed. As a product, as shown in FIG. 4, the core material 5 is not exposed from the skin side, the color is not mixed, and the two-color skin composed of the first skin 4 and the second skin 12 which are neatly divided is used. Car interior parts that you have are completed.

Further, the forming upper die 20 can be moved up and down by a predetermined stroke by an elevating cylinder 21.

On the other hand, the molding lower mold 30 is provided with a gate 33 and an aftermixer 34 as a resin passage for supplying RIM urethane from the first injection head 41, and the first in the automobile interior goods 1 through the gate 33 and the aftermixer 34. The first RIM urethane forming the outer skin 4 is supplied into the first cavity C1. Further, the second RIM urethane is supplied from the second injection head 40 to the cavity C <b> 2 that forms the second skin 12 through the gate 31 and the aftermixer 32.

Further, an elevating block 50 is provided on the second cavity C2 side corresponding to the boundary portion between the first skin 4 and the second skin 12. The lifting block 50 is supported by a shaft 51 and driven by a hydraulic cylinder 52 connected to the shaft 51.

Next, each step of manufacturing the automobile interior part 1 using the manufacturing apparatus 10 having the above-described configuration will be described. FIG. 5 shows a setting process of the core material 5. In the setting process of the core material 5, the molding upper mold 20 is in an open state, and the lifting block 50 in the molding lower mold 30 is also positioned above. . First, the core material 5 in the automobile interior part 1 is set on the molding upper die 20. Then, the lifting block 50 is further raised, and the sharp tip 8 is inserted into the core member 5.

When the setting of the core material 5 is completed, the molding upper die 20 is lowered by a predetermined stroke by the operation of the lifting cylinder 21, and when the molding upper and lower dies 20, 30 reach a predetermined clearance, the first injection head RIM urethane M1 which is the material of the skin 4 of the automobile interior product is supplied from the injection machine 41 to the lower surface side of the core material 5 through the gate 33 and the aftermixer 34, and as shown in FIG. The first skin 4 is formed by descending to the bottom.

  At this time, the elevating block 50 is lifted and further inserted into the core material 5, so that the molten resin M1 does not flow out to the second cavity C2 side.

  Next, when the molding of the first skin 4 is completed, as shown in FIG. 7, in the cavity C2 for molding the second skin 12 from the second injection head 40 through the gate 31 and the after mixer 32, as shown in FIG. The second RIM urethane M2 is supplied to the second skin 12, and the second skin 12 is formed into a required shape, and is integrated with the first skin 4 and the core material 5.

  At this time, the lifting block 50 is lowered to the position shown in FIG. 7 by the action of the hydraulic cylinder 52, and the core material 5 is not seen from the skin side.

  As another embodiment of the present invention, as shown in FIG. 8, FIG. 9, FIG. 10 and FIG. 11, a two-color skin is molded using a thermoplastic resin such as thermoplastic olefin or thermoplastic urethane. Even in this case, the present invention can be applied. Unlike the case where RIM urethane is injected by using a mold parting surface, molten resin is injected from an injection machine 60 and directly injected into a cavity through a manifold 61 and a gate 62.

It is a whole side view which shows the manufacturing apparatus used for the manufacturing method of the two-color molded product which concerns on this invention. It is explanatory drawing which shows the formation process of the 2 color skin in one Embodiment of the manufacturing method of the 2 color molded product which concerns on this invention. It is explanatory drawing which shows the formation process of the 2 color skin in one Embodiment of the manufacturing method of the 2 color molded product which concerns on this invention, Comprising: It is sectional drawing which showed the state which inject | poured the 2nd molten resin. FIG. 2 is a cross-sectional view showing a finished product which is a two-color molded product according to the present invention and in which a skin and a core material are laminated. It is explanatory drawing which shows the setting process of the skin in one Embodiment of the manufacturing method of the two-color molded article which concerns on this invention. It is explanatory drawing which shows the formation process of the 1st skin in one Embodiment of the manufacturing method of the two-color molded product which concerns on this invention. It is explanatory drawing which shows the formation process of the 2nd skin in one Embodiment of the manufacturing method of the two-color molded product which concerns on this invention. It is a figure equivalent to FIG. 1 at the time of applying a thermoplastic resin to an outer skin with the manufacturing method of the two-color molded article which concerns on this invention. FIG. 6 is a view corresponding to FIG. 5 when a thermoplastic resin is applied to the skin in the method for manufacturing a two-color molded product according to the present invention. FIG. 7 is a view corresponding to FIG. 6 when a thermoplastic resin is applied to the skin by the method for manufacturing a two-color molded product according to the present invention. It is a figure equivalent to FIG. 7 at the time of applying a thermoplastic resin to an outer skin with the manufacturing method of the two-color molded product which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automobile interior goods 4 1st skin 5 Core material 8 Tip 9 O-ring 10 Manufacturing apparatus 12 2nd skin 20 Molding upper mold 21 Lifting cylinder 30 Molding lower mold 31 Gate 32 After mixer 33 Gate 34 After mixer 40 Injection head 41 injection head 50 lifting block 51 shaft 52 hydraulic cylinder 60, 61 injection machine C1 first cavity C2 second cavity M1 first RIM urethane M2 second RIM urethane

Claims (6)

A method of manufacturing an interior product for an automobile in which a core material is installed in a mold and molten resin is injected into a gap between the mold and the core material to form a skin on the surface of the core material. In the manufacturing method of interior parts for automobiles injected from the opposite sides of the mold, a weir with a sharp angle at the tip is provided in the mold, and the molten resin is dammed to form skins of different colors on the core material A method for manufacturing automotive interior parts.   The manufacturing method of the interior product for motor vehicles of Claim 1 which inject | pours molten resin in the state which inserted the said weir in the core material.   The manufacturing method of the interior product for motor vehicles of Claim 1 or 2 which used the said weir as the raising / lowering block which is movable.   The method for producing an automobile interior product according to any one of claims 1 to 3, wherein the resin is a thermosetting liquid resin.   A method of manufacturing an interior product for an automobile in which a core material is installed in a mold and molten resin is injected into a gap between the mold and the core material to form a skin on the surface of the core material. In the method of manufacturing automotive interior parts to be injected from the opposite sides of the core material, when the molten resin is injected from one end side of the core material, the tip provided at a mold different from the mold on which the core material is installed has an acute angle. Move the elevating block to the core material side, insert the tip of the elevating block into the core material, inject molten resin, and after the molten resin hardens, retract the elevating block, and the color is different from the other end side of the core material A method for producing an interior product for an automobile, characterized by injecting a molten resin and curing it. The method for manufacturing an automotive interior product according to claim 5, wherein the resin is a thermosetting resin.

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