JPH04128827U - Press molding mold equipment - Google Patents

Abstract

(57) [Summary] [Purpose] In a press molding mold device used for the simultaneous press method of resin core material and skin material, it is possible to prevent the occurrence of wrinkles, and to improve the surface appearance in high expansion rate areas. An object of the present invention is to provide a press molding die device that ensures good cushioning performance. [Structure] Holding pin 4 that holds the peripheral part of the skin material 12
0 is provided with a flexible deformable portion 43, and a resin core material 11 and a skin material 12 are provided.
When integrated with the press, an appropriate tension is applied to the skin material 12, and the skin material 12 is slipped into the high expansion rate parts of the molds 21 and 31, thereby creating an interior that has a good surface appearance and ensures cushioning performance. The part 10 was made moldable.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention creates automobile interior parts that are made by integrating a resin core material and a skin material by pressing them together. The present invention relates to a press molding die device for forming shapes.

0002

[Conventional technology]

Normally, interior parts installed on the inner side of the car body panel have shape retention properties. A core material with rigidity for attachment to vehicle body panels, and a decorative material affixed to the surface side of this core material. Generally, they consist of a laminated structure with a skin material that provides elasticity and cushioning properties. .

0003 FIG. 10 is a sectional view showing the structure of a conventional automobile door trim. The door trim 1 includes a core material 2 that is press-molded into a desired shape, and a It is composed of a skin material 3 that is integrally attached.

0004 The method of forming this automobile door trim 1 will be described below.

[0005] First, polypropylene was selected as the core material 2, considering cost, formability, strength, etc. Composite polypropylene made by mixing oil or polypropylene resin with wood powder filler, etc. When using resins, these polypropylene resins (composite polypropylene resins) After preheating and softening the extruded sheet, as shown in Figure 11, Place it on the lower mold 4 for molding.

[0006] Then, for the press molding upper mold 5 located above the press molding lower mold 4, The skin material 3, such as a foamed PVC sheet, is fixed by piercing its periphery into the fixing pin 6. Then, the resin core material 2 and the skin material 3 are set.

[0007] Next, as shown in FIG. 12, the upper and lower press dies 4 and 5 are engaged and tightened to press the The fat core material 2 is molded along the required mold surface shape, and a skin is formed on one side of the resin core material 2. The material 3 is attached together to complete the production of the automobile door trim 1.

[0008] In addition, the skin material 3 is set in a free state on the preheated and softened resin core material 2, A method of integrating a resin core material 2 and a skin material 3 using upper and lower molds 4 and 5 for press molding. is also being implemented.

[0009]

[Problem that the idea aims to solve]

However, for example, if the skin material 3 is set on the upper surface side of the resin core material 2 in a free state, When the skin material 3 is pressed simultaneously, the skin material 3 is Therefore, no tension is applied to the skin material 3, and the original fabric of the skin material 3 has a While the bow pattern is utilized and good cushioning performance is obtained, wrinkles are avoided. It has been pointed out that there is a problem with not being able to do so.

0010 Conversely, the periphery of the skin material 3 is fixed using the fixing pin 6 and press integration is performed at the same time. In this case, the resin core material 2 and the skin material 3 are pressed together with tension applied to the skin material 3. Since the press molds 4 and 5 are integrated, there are no wrinkles, but the expansion rate of press molds 4 and 5 is In large areas, the grain pattern on the surface of the skin material 3 may be deformed, or the surface material may be extremely 3 is stretched, problems such as a decrease in cushioning function have been pointed out. There is.

[0011] This invention was created in view of these circumstances, and the purpose of this invention is In Roha, wrinkles appear in the skin material when the resin core material and skin material are simultaneously pressed together. Also, there is no grain flow or a decrease in cushioning function in areas with a high development rate. Molding of automobile interior parts with good product appearance by effectively solving various problems such as The object of the present invention is to provide a press molding die device that is capable of performing.

0012

[Means to solve the problem]

In order to achieve the above purpose, the present invention consists of a lower mold for press molding and an upper mold for press molding. It consists of a preheated softened resin core material and a skin material that are pressed together at the same time. In press molding equipment that molds automotive interior parts of required shapes, The mold surface of the upper mold for press molding has a flexible retainer that holds the periphery of the skin material. When the holding pin is attached and the resin core material and skin material are pressed together, the above holding pin It is characterized by being able to flexibly deform and allow the skin material to slide into the press mold. shall be.

[0013] In addition, the present invention consists of a lower mold for press molding and an upper mold for press molding, and The molded resin core material and skin material are simultaneously pressed and integrated to create the desired shape for automobile interiors. In press molding equipment for molding parts, On the mold surface of the upper mold for press molding, there are holding pins that hold the periphery of the skin material. It is installed so that it can slide along the center direction, and the spring always points outward. When the resin core material and skin material are pressed together, the holding pin points toward the center of the mold. The sliding action allows the skin material to slide into the press mold. It is characterized by

[0014]

[Effect]

As is clear from the above configuration, the configuration of the holding pin that holds the periphery of the skin material and The resin core material can be made flexible or slidable. When the press is integrated with the skin material, when the skin material is set in a free state, and when the skin material is set in a free state, Apply a tension to the skin material that is halfway between that when the peripheral edge of the material is fixed. This tension will prevent wrinkles from forming on the skin material. In addition, since the skin material can slide into the mold, it can be used in the high expansion rate part of the press mold. There is no excessive stretching of the skin material in minutes, and the surface of the skin material is This effectively solves the drawbacks such as flow and deterioration of cushioning function.

[0015]

【Example】

Below, please refer to the attached drawings for examples of the press molding mold device according to the present invention. This will be explained in detail.

[0016] Before explaining the device according to the present invention, let us explain an example of the automobile interior parts to which it is applicable. This will be explained based on FIG.

[0017] In the drawings, this automobile door trim 10 is formed into a desired curved shape. It is integrally attached to the resin core material 11 and the surface side of this resin core material 11 by press molding. It is generally composed of a skin material 12.

[0018] More specifically, the resin core material 11 is appropriately blended with polypropylene resin and wood powder. After mixing and stirring at the same ratio, extrude into a sheet using a T-die extruder, and heat this sheet. After softening, it is molded into the desired curved shape by cold press molding as described below. has been done.

[0019] On the other hand, the skin material 12 includes a skin layer 13 such as a PVC sheet, and a skin layer 13 such as a PVC sheet. A laminated structure with a foam layer 14 such as polyurethane foam laminated on the back side of the A synthetic skin material 12 is used.

[0020] In addition, a grain pattern is engraved on the surface of the skin layer 13 to give it a design. There is.

[0021] Therefore, the appearance is improved by the decorative properties of the skin layer 13 and the cushioning properties of the foam layer 14. A door trim 10 with good design and feel is provided.

[0022] Now, the press mold device used for press forming the above automobile door trim 10. Explaining the configuration based on FIG. 2, this press mold device has a The lower mold 21 for press molding is fixed to the upper base 30, and the lower mold 21 for press molding is fixed to The upper and lower molds 21 and 31 for press molding form the product shape. It has a desired curved mold surface.

[0023] Further, the upper base 30 is connected to a lifting device (not shown) and is configured to be able to rise and fall. A cut blade 32 is attached to a spring mechanism 3 on the outer periphery of the upper die 31 for press molding. It is attached via 3.

[0024] By the way, the present invention is installed in the upper mold 31 for press molding, and the peripheral edge of the skin material 12 is A feature is that the holding pin 40 to be held is configured to be flexibly deformed.

[0025] That is, as shown in FIG. 3, this holding pin 40 A mounting part 41 with screw processing that can be attached to the The flexible deformable portion 43 with a spring wound around the outer surface 42 and the skin material 12 are smoothly pushed together. It consists of a tip 44 whose tip is set to a sharp shape so as to stab.

[0026] Next, based on FIGS. 4 to 6, the operation of the press mold apparatus according to the present invention will be explained. I will explain.

[0027] First, as shown in FIG. 4, the upper surface of the lower press mold 21 is preheated to a predetermined temperature and softened. At the same time, set the resin core material 11 that has been pierce the peripheral edge of the skin material 12 into the tip 44 of the holding pin 40, Set the skin material 12.

[0028] At this time, the flexible deformable portion 43 of the holding pin 40 has a bellows-like outer surface, and the outer surface Falling off of the material 12 can be reliably prevented.

[0029] Thereafter, as shown in FIG. 5, the upper base 30 is moved by the operation of a lifting device (not shown). First, the resin core material 11 is trimmed by the cutting blade 32 as shown in FIG. Mu-cut processing is performed.

[0030] At this time, the skin material 12 is attached to a holding pin 40 having a flexible deformable portion 43 on its periphery. Since the holding pin is held by the external force applied from the upper die 21 for press molding, The flexible deformable portion 43 of the ring 40 bends toward the center of the mold, causing a slight damage to the skin material 12. Under tension, the skin material 12 is drawn toward the center of the mold.

[0031] Then, the upper base 30 further descends, and as shown in FIG. By engaging and tightening the upper and lower dies 21 and 31, the resin core material 11 is press-molded into the desired shape. At the same time, the resin core material 11 and the skin material 12 are pressed together.

[0032] At this time, the flexible deformable portion 43 of the holding pin 40 separates from the skin material 12. Because the skin material 12 flexibly deforms sufficiently effectively against the external force, wrinkles may not occur in the skin material 12. The skin material 12 has no sharp edges, and even in areas with a high rate of development due to the shape of the press mold, the skin material 12 does not adhere to the mold. The grain pattern on the surface of the skin material 12 may be deformed because it is attracted to the high development rate area. , the foam layer 14 does not become thinner, providing excellent product appearance and cushioning performance. A door trim 10 equipped with the above can be manufactured.

[0033] In addition, in this embodiment, the recess 50 that accommodates the holding pin 40 is located at the cutting blade 3. It is provided on the top surface of 2.

[0034] As described above, according to the present invention, the resin core material 11 and the skin material 12 are simultaneously pressed and integrated. In the chemical construction method, the skin material 12 is held by flexibly deformable holding pins 40. This allows the skin material 12 to slide along the mold surface while applying a little tension. This makes it possible to create high-value products with good product appearance and surface feel. The atrim 10 can be molded, and the holding pin 40 with the flexible deformation part 43 can be used. It is also very practical because it can be realized with a simple configuration that uses only one device.

[0035] Next, as a modification of the holding pin 40 shown in FIGS. 7 and 8, as shown in FIG. Instead of a spring, a rubber body 45 may be used as the flexible deformation portion 43. , as shown in FIG. It may also be formed from pulling steel.

[0036] Next, FIG. 9 shows another embodiment of the press mold apparatus according to the present invention. According to this embodiment, the mold surface of the upper die 31 for press molding is formed from the periphery toward the center. A slide groove 60 is provided in which the outer edge of the skin material 12 is inserted The holding pin 40 to be held is slidably installed, and the spring is inserted into the slide groove 60. By installing the spring 61, the spring force of the spring 61 allows the pin to be held at all times. When pressing the resin core material 11 and the skin material 12 together by pressing the resin core material 11 and the skin material 12, The holding pin 40 receives the tension from the skin material 12 and is applied to the spring force of the spring 61. The mold is slid toward the center of the mold to apply an appropriate amount of tension to the skin material 12, as in the above embodiment. In addition to applying pressure, it also enables the skin material 12 to be slid into place, as described above. It has the same effect as the example.

[0037]

[Effect of the idea]

As explained above, according to the press molding mold device according to the present invention, the following can be achieved. It has special effects.

[0038] (1) According to the press molding mold device according to the present invention, the peripheral edge of the skin material can be made flexible. Since it is held by a shapeable holding pin, the resin core material and skin material are When the press is integrated, moderate tension is applied to the skin material, causing wrinkles in the skin material. There's nothing to do.

[0039] Furthermore, in the high expansion rate parts of press molds, retaining pins that hold the skin material are By flexibly deforming, it is possible to slide the skin material into the high expansion rate part of the mold. This may cause deformation of the grain pattern of the skin material in areas with a high expansion rate and a decrease in cushioning function. This problem is eliminated, and good surface appearance and cushioning performance are ensured.

[0040] Therefore, if the mold device according to the present invention is implemented, beautiful surface appearance and good looseness can be achieved. This has the effect of providing automobile interior parts with impact resistance.

[0041] (2) According to the press molding mold device according to the present invention, the product shape can be manufactured with a high development rate and a complex shape. Even if it is set to a complex curved shape including parts, it is expected that the skin material will slide into the mold. This allows for good molding that follows the press mold, allowing for greater freedom in product shaping. This has the effect of dramatically expanding the

[0042] (3) According to the present invention, a holding pin with a flexible deformation part is provided in the upper die for press molding. It has a simple configuration, allowing the use of conventionally configured molds, and also requires no holding pins. By adjusting the elasticity of the flexible deformation part, you can create any product shape and any skin. It has the effect of being able to select materials and having extremely practical value.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of an automobile door trim manufactured using a press molding die apparatus according to the present invention.

FIG. 2 is a sectional view showing the configuration of a press molding die device according to the present invention.

FIG. 3 is a sectional view showing one embodiment of a holding pin used in the press molding die device according to the present invention.

FIG. 4 is a cross-sectional view showing a material setting process, showing a door trim manufacturing process using the press molding die device according to the present invention.

FIG. 5 is a cross-sectional view showing a step of cutting a resin core material, showing the door trim manufacturing process using the press molding die device according to the present invention.

FIG. 6 is a sectional view illustrating a door trim manufacturing process using the press-molding mold apparatus according to the present invention, and illustrating a process of integrally pressing a resin core material and a skin material.

FIG. 7 is a sectional view showing another embodiment of the holding pin used in the press molding die device according to the present invention.

FIG. 8 is a side view showing yet another embodiment of the holding pin used in the press molding die device according to the present invention.

FIG. 9 is a perspective view of essential parts showing another embodiment of the press molding die device according to the present invention.

FIG. 10 is a sectional view showing the structure of a conventional automobile door trim.

FIG. 11 is a sectional view showing a material setting process in a conventional press integration method.

FIG. 12 is a sectional view illustrating a pressing process in a conventional press integration method.

[Explanation of symbols]

10 Automotive door trim 11 Resin core material 12 Skin material 20 Lower base 21 Lower mold for press molding 30 Upper base 31 Upper mold for press molding 32 Cutting blade 40 Holding pin 41 Mounting part 43 Flexible deformation part 45 Rubber body 46 frames 60 Slide groove 61 Spring

Continuing from the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location B29L 9:00 4F 31:58 4F

Claims (2)

[Scope of utility model registration request] Claim 1: Consisting of a lower mold for press molding (21) and an upper mold for press molding (31), the resin core material (1) is preheated and softened.
1) and a skin material (12) at the same time to form an automobile interior part (10) of a desired shape, the press molding device includes the upper mold for press molding (31).
A flexible holding pin (40) that holds the periphery of the skin material (12) is attached to the mold surface of the resin core material (12).
1) and the skin material (12) are pressed together, the holding pin (40) is flexibly deformed to enable the skin material (12) to slide into the press mold (21, 31). A press molding mold device characterized by: [Claim 2] Consisting of a lower mold for press molding (21) and an upper mold for press molding (31), a preheated softened resin core material (11) and a skin material (12) are simultaneously pressed and integrated. In a press molding mold device for molding an automobile interior part (10) of a desired shape, the upper mold for press molding (3
On the mold surface of 1), a holding pin (40) that holds the peripheral edge of the skin material (12) is installed so as to be able to slide along the center direction of the mold (31), and a spring is always directed outward. (61) energized, resin core material (11) and skin material (12)
When integrated with the press, the holding pin (40) slides toward the center of the mold, allowing the skin material (12) to slide into the press mold (21, 31). A mold device for press molding.