JP2940654B2 - Manufacturing method and equipment for automotive interior parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing an automobile interior part such as a door trim as an automobile interior material.

[0002]

2. Description of the Related Art As shown in FIG. 7, an interior material called a door trim 31 is fitted inside an automobile door 30 to cover a metal portion of a body of a vehicle body to improve the appearance of a vehicle interior and to provide a soft atmosphere. It exudes.

[0003] The door trim 31 is usually formed of a synthetic resin, and includes an armrest 32 and a door pocket 3.
In addition to being integrally formed, the surface of the upper and lower portions 31a and 31b and the intermediate portion 31c are often made of different skin layers or materials in order to further enhance the decorative effect.

As shown in FIG. 10, the door trim 31 is made of a core material 34 made of a thermoplastic synthetic resin which can be injection-molded, for example, such as ABS or polypropylene composite material.
And a skin material 35, and the skin material 35 is
The foamed PVC 37 is adhered to the base cloth 36,
A sheet obtained by bonding PVC 38 to C37 is used, and is formed by a press molding method.

In this press molding method, a clearance (cavity) 39 corresponding to the outer shape of the door trim 31 is formed as shown in FIGS.
1 is used.

In this molding die 42, a wood grain groove 43 is formed in the lower mold 41, and a wood grain groove forming part 44 corresponding to the wood grain groove 43 is formed in the upper mold 40. Reference numeral 40 denotes a movable die, and a lower die 41 is a fixed die. The lower die 41 is provided with a resin injection part 45.

In the opened state, the upper and lower dies 40,
41, the outer skin 35 is set between the upper mold 4 and the outer peripheral portion of the outer skin 35 is fixed by a clamp 46.
In the meantime, the molten resin 47 for the core material is injected from the resin injection portion 45 of the lower die 41 into the clearance 39 below the skin material 35, and the upper die 40 and the lower die 41 are formed. The skin material 35 and the molten resin 47 for the core material are formed into a substantially predetermined shape in a state in which they are combined.

[0008]

However, in the above-mentioned conventional method for manufacturing an interior part for an automobile, the upper and lower dies 40,
41 is manufactured, and in the state immediately before the bottom dead center of the press, when the wood grain groove forming part 44 pushes the skin material 35 into the wood grain groove part 43 as shown in FIG. Since the outer peripheral portion is pressed by the clamp 46, a tensile stress is generated in the skin material 35, the texture of the base cloth 36 of the skin material 35 is widened, and the skin material 35 is edged 43a of the wood grain groove 43. Therefore, there is a problem that the flow of the core material molten resin 47 injected below the skin material 35 is interrupted.

At the bottom dead center of the press, as shown in FIG. 12, the molten resin 47 for the core material to which pressure has been applied passes through the base cloth 36 whose texture is widened by the tensile stress as described above, and foams. When the PVC 37 is reached and the shape shaping is performed, the skin material 35 and the core material 34 are cut off at the portion where the flow of the core molten resin 47 of the skin material 35 is blocked (the portion indicated by oblique lines in FIG. 12). Does not adhere, and the outer peripheral processing of the wood grained cloth is performed by the cutting blade 48 as shown in FIG.
In this case, there is a problem that the outer peripheral cut surface of the cloth is peeled off from the core 34 together with the skin 35.

The present invention has been made in view of the above-mentioned problems, and a first object of the present invention is to make the flow of the molten resin for the core material smooth, so that the skin material and the core The interior of an automobile can reliably solve the problem that the outer peripheral cut surface of the cloth is peeled off from the core material together with the skin material when the outer peripheral processing of the grained cloth is performed by the cutting blade when the outer peripheral processing of the grained cloth is performed with the cutting blade. An object of the present invention is to provide a method for manufacturing a component.

It is a second object of the present invention to provide an apparatus for manufacturing interior parts for automobiles, which can smoothly manufacture interior parts.

[0012]

In order to achieve the first object, a method of manufacturing an automobile interior part according to the present invention comprises:
One mold having a protruding shaping member provided on the other mold side and projecting the shaping member by a predetermined amount to form a wood grain groove shaping part, and a wood grain groove part facing the wood grain groove shaping part When the mold having the other mold having the resin injection section and the other mold is in the open state, the skin material is set between the two molds, and then one mold is moved to the resin filling mode position L2. Then, the skin material is pressed by the wood grain groove forming part, and a gap c is formed between the skin material and the edge of the wood grain groove part. Next, at the resin filling mode position L2, the resin injection is performed. The molten resin for the core material is injected from the portion to the back side of the skin material, and the molten resin for the core material is filled into the back side of the skin material by flowing the resin through the gap c. The mold is moved to the molding mode position L3, and the shaping member is protruded by a predetermined amount, and Characterized in that by pressing the wood and to perform shape shaping performed pressurization.

[0013] In order to achieve the second object, an apparatus for manufacturing an automobile interior part according to the present invention comprises the step of forming a grained groove forming portion provided in one of the molds into a movable type. A shaping member, and a moving operation portion for projecting the shaping member to the other mold side so that the shaping member can slide in a shaping member sliding hole formed in one mold. Wherein the moving operation section is housed in a housing section formed in one of the molds.

[0014]

According to the method of manufacturing an interior part for an automobile of the present invention, at the resin filling mode position L2, the wood grain groove forming portion presses the skin material, but the skin material is an edge of the wood grain groove part. There is no contact between them, and a gap c is formed between them, so that the molten resin for the core material flows in the resin flowing direction without being blocked by the skin material, and flows on the back side of the skin material. It is filled, and the moving distance L of the wood grain groove forming part can be set in advance so that the grain of the base fabric of the skin material does not spread even if it pushes down the skin material, Even when the grain-shaped groove forming portion presses the skin material, the grain of the base cloth does not spread, and the molten resin for the core material to which the pressure is applied passes through the base cloth with the spread grain and reaches foamed PVC. There is no shaping. Therefore, the flow of the core resin becomes smooth, and the adhesion between the skin material and the core material is ensured. Therefore, when the outer peripheral processing of the wood grained cloth is performed by the cutting blade, the problem that the outer peripheral cut surface of the cloth is peeled off from the core material together with the skin material can be solved.

Further, according to the automobile interior part manufacturing apparatus of the present invention, one of the dies is moved to the resin filling mode position L2, and the skin material is pressed by the wood-groove forming part. In forming a gap c between the skin material and the edge of the wood grain groove, a wood grain groove shaped part in which the shaping member is protruded by a predetermined amount in advance is formed, and one of the molds is set in a molding mode. When moving to the position L3 and pressing the skin material to apply pressure to perform shape shaping, the moving operation unit can be operated to cause the shaping member to protrude by a predetermined amount, and the interior of the vehicle Parts can be manufactured smoothly.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially omitted cross-sectional view of an automobile interior part manufacturing apparatus according to the present invention in an open state, and FIG. 2 is a partially omitted cross-sectional view of the automobile interior part manufacturing apparatus in the closed state. FIG. 3 is an explanatory view of a configuration of a wood-groove shaping portion and a resin filling mode in the apparatus for manufacturing interior parts for automobiles, and FIG. 4 is an explanatory view of a mode in manufacturing interior parts for automobiles.

In a method of manufacturing a door trim (press molding method), which is an interior part for an automobile, a molding die 5 having a lower die 3 and a lower die 4 and a clearance (cavity) 2 corresponding to the outer shape of the door trim 31 are formed. Used. In this molding die 5, an upper die (one die) 3 which is a movable die
Is provided with a wood grain groove forming part 8, and a lower mold (the other mold) 4 which is a fixed mold is provided with a wood grain groove part 6 and a resin injection part 7 corresponding to the wood grain groove forming part 8. is there.

The wood-groove shaping portion 8 has a movable shaping member 9 which is fixed to a piston rod 11 of a cylinder 10 constituting a moving operation portion. Forming member sliding hole 12 formed in upper mold 3
Is slidably provided. The cylinder 10 is housed in a cylinder housing 13 formed in the upper die 3.

Therefore, by moving the cylinder 10 up and down, the shaping member 9 can be slid in the vertical direction to change the moving distance L of the wood-groove shaping portion 8. Further, the molding die 5 is provided with a clamp 14 for gripping and fixing the outer peripheral portion of the skin material 35.

Next, a method of manufacturing the door trim 31 will be described. As described in the conventional example, the door trim 31
The core material 34 is a laminated molded body of a skin material 35. The core material 34 is made of an injection-moldable thermoplastic synthetic resin such as an ABS or a polypropylene composite material. A sheet formed by laminating a foamed PVC 37 to the cloth 36 and laminating a PVC 38 to the foamed PVC 37 is used.

First, as shown in FIG. 1, when the upper die 3 is located at the top dead center b of the press in the open state, the upper and lower dies 3,
The skin material 35 is set between the four, and the outer peripheral portion of the skin material 35 is fixed by the clamp 14. In this case, the cylinder 10 is not operated, and the shaping member 9 protrudes downward by a predetermined amount to form the wood grain groove shaping portion 8 having a predetermined length.

Next, as shown in FIGS. 3 and 4, the upper mold 3 is moved to the resin filling mode position L2 (the distance between the lower end 8a of the wood-groove forming section 8 and the bottom dead center d). 10
(At a position of 20 mm). In this case, the lower end 8a of the grained groove forming portion 8 is lowered by the lowering of the upper die 3.
Pushes down the skin material 35, but the skin material 35 does not contact the edge 6 a of the wood grain groove 6, and a gap c is formed between them. The moving distance L of the wood grain groove forming part 8 is the same as the skin material 3.
5 is set in advance so that the texture of the base fabric 36 of the skin material 35 does not spread even when the skin material 35 is pushed down, so that even if the lower end portion 8a of the wood grain groove forming portion 8 pushes the skin material 35 down, The texture of the cloth 36 does not spread.

Next, at the resin filling mode position L2, the core molten resin 47 is injected from the resin injection section 7 of the lower mold 4 into the clearance 2 below the skin 35 (FIG. 4).
(See resin filling mode). In this case, the skin material 3
Since a gap c is formed between the groove 5 and the edge 6 a of the wood groove 6, the molten resin 47 for the core material flows without being blocked by the skin material 35 and flows in the clearance 2. Is filled below the skin material 35.

Next, the upper mold 3 is moved to the molding mode position L3.
(Press bottom dead center d). At this position, the cylinder 10 is extended and the shaping member 9 projects downward by a predetermined amount (5 to 7 mm) to push down the skin material 35 and pressurize, thereby performing shape shaping ( (See the molding mode shown in FIG. 4). In this case, the core resin molten resin 47 starts to be hardened at the bottom of the wood grain groove 6, but the upper part slightly flows, so that shape shaping is possible. Further, since the texture of the base fabric 36 is not widened, the molten resin 47 for the core material to which the pressure is applied passes through the base fabric 36 with the widened fabric and reaches the foamed PVC 37 to form the shape. Never.

In the above embodiment, the lower end 8a of the wood-groove forming portion 8 pushes down the skin 35 by lowering the upper die 3 to the resin filling mode position L2. Reference numeral 35 denotes an edge 6 of the wood grain groove 6.
a, and a gap c is formed therebetween, so that the core molten resin 47 flows in the resin flow direction a without being blocked by the skin material 35 and the clearance 2 is filled below the skin material 35,
In addition, the moving distance L of the wood grain groove forming portion 8 can be set in advance so that the grain of the base cloth 36 of the skin material 35 is not widened even if it pushes down the skin material 35. Even when the wood grain groove forming part 8 presses the skin material 35, the grain of the base cloth 36 does not spread, and the core material molten resin 47 to which the pressure is applied in the molding mode causes the base cloth 36 with the spread grain to spread. It does not pass through to the foamed PVC 38 to form the shape.

Accordingly, the flow of the core material molten resin 47 becomes smooth, and the adhesion between the skin material 35 and the core material 34 is ensured. For this reason, when the outer peripheral processing of the grained cloth is performed by the cutting blade 48, the problem that the outer peripheral cut surface of the cloth is peeled off from the core 34 together with the skin 35 is solved.

As shown in FIG. 5, a punching mechanism 15 may be provided on the upper die 3 and a punch receiving mechanism 16 may be provided on the lower die 4. The punching mechanism 15 includes a movable shaping member 17, and a punch 18 is formed at the lower end of the shaping member 17. The shaping member 17 is fixed to a piston rod 20 of a cylinder 19 and is slidably provided in a shaping member sliding hole 21 formed in the upper die 3. The cylinder 19 is housed in a cylinder housing 22 formed in the upper die 3.

The punch receiving mechanism 16 has a receiving member 24 in a hole 23 provided in the lower die 4 and a spring 25 for supporting the receiving member 24.

Then, in the molding mode, the cylinder 19 is extended and the shaping member 17 protrudes downward by a predetermined amount to push down the skin material 35 and pressurize, thereby performing shape shaping. Further, the cylinder 19
Is extended, and the skin material 35 and the core material 34 are punched by the punch 18 at the lower end of the shaping member 17 to perform the hole processing. A hole 26 is formed in the door trim 31 thus formed, as shown in FIG.

[0030]

As described above, in the method of manufacturing an interior part for an automobile according to the present invention, at the resin filling mode position L2, the wood grain groove forming portion presses the skin material. The skin material does not come into contact with the edges of the wood-groove grooves, and a gap c is formed between them, so that the molten resin for the core material is not blocked by the skin material, and the resin flows in the direction of resin flow. And flows into the back side of the skin material, and the moving distance L of the wood-groove shaping portion
Even if this presses down the skin material, it can be preset so that the grain of the base fabric of the skin material does not spread, so that even if the wood grain groove forming part presses the skin material, When the molten resin for the core material to which the pressure is applied passes through the base fabric where the
It does not reach C and shape shaping is performed.

Therefore, the flow of the molten resin for the core material becomes smooth, and the adhesion between the skin material and the core material is ensured. Therefore, when the outer peripheral processing of the wood grained cloth is performed by the cutting blade, the problem that the outer peripheral cut surface of the cloth is peeled off from the core material together with the skin material can be solved.

In the apparatus for manufacturing interior parts for automobiles according to the present invention, one of the dies is set in the resin filling mode position L2.
To form a gap between the skin material and the edge of the wood grain groove, the shaping member was previously projected by a predetermined amount. In the case of forming a wood grain groove forming part in a state, and moving one of the molds to the molding mode position L3 to press the skin material to apply pressure to perform shape shaping, the moving operation part is used. The shaping member can be made to protrude by a predetermined amount by operation, and the manufacture of interior parts for automobiles can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a partially omitted cross-sectional view of an apparatus for manufacturing an automobile interior part according to the present invention in an open state.

FIG. 2 is a partially omitted cross-sectional view in a closed state of the apparatus for manufacturing an automobile interior part.

FIG. 3 is an explanatory diagram of a configuration of a wood-groove forming portion and a resin filling mode in the manufacturing apparatus for an interior part for an automobile.

FIG. 4 is an explanatory view of a mode in the production of the vehicle interior part.

FIG. 5 is a cross-sectional view of another groove-shaped portion in the apparatus for manufacturing an automobile interior part.

FIG. 6 is a perspective view of a door trim formed by another groove forming portion shown in FIG.

FIG. 7 is a perspective view of an automobile door as viewed from inside.

FIG. 8 is a partially omitted cross-sectional view of a conventional automobile interior part manufacturing apparatus in an open state.

FIG. 9 is a partially omitted cross-sectional view of the automobile interior part manufacturing apparatus in a closed state.

FIG. 10 is a partial sectional view of a door trim.

FIG. 11 is an explanatory view of an operation of a conventional automobile interior part manufacturing apparatus immediately before a press bottom dead center of a wood-groove forming portion.

FIG. 12 is an explanatory diagram of an operation of a bottom dead center of a press of a wood-groove groove forming portion in the manufacturing apparatus of the automobile interior part.

FIG. 13 is an explanatory diagram of the outer periphery processing of the wood grain cross of the door trim.

[Explanation of symbols]

 Reference Signs List 3 Upper mold (one mold) 4 Lower mold (the other mold) 5 Mold 6 Wood grain groove 7 Resin injection part 8 Wood grain groove shaping part 9 Shaping member 31 Door trim (automobile interior parts) 34 Core material 35 Skin material 47 Molten resin for core material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-15672 (JP, A) JP-A-4-67919 (JP, A) JP-A-2-231118 (JP, A) JP-A-63-63 132014 (JP, A) JP-A-62-256619 (JP, A) JP-A-61-230920 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B29C 45/00-45 / 84

Claims (2)

(57) [Claims] 1. A mold in which a protruding shaping member is provided on the other mold side, and the shaping member is protruded by a predetermined amount to form a wood grain groove shaping part; and a wood grain groove shaping part. When the mold having the other mold having the wood groove and the resin injection part facing the mold is open, a skin material is inserted between the two molds, and then one mold is placed under a press. A predetermined interval is set for the dead center.
It moves to the set resin filling mode position L2, and presses the skin material with the wood grain groove shaping part, and forms a gap c between the skin material and the edge of the wood grain groove part. At the resin filling mode position L2, the molten resin for the core material is injected from the resin injection portion to the back side of the skin material, and the molten resin for the core material is caused to flow through the gap c so that the resin for the skin material is removed. Then, one of the dies is moved to a molding mode position L3, which is substantially the bottom dead center of the press, and the shaping member is protruded by a predetermined amount to press the skin material to perform pressure. A method of manufacturing an interior part for an automobile, characterized in that shape shaping is performed. 2. A shaping groove forming portion provided in one mold of a molding die is constituted by a movable shaping member and a moving operation portion for projecting the shaping member to the other mold side. The shaping member is slidably provided in a shaping member sliding hole formed in one mold, and the moving operation portion is housed in a housing portion formed in one mold. Manufacturing equipment for automotive interior parts.