JPS61248711A - Compression forming, in which mounting of fitment is effected simultaneously - Google Patents

Abstract

PURPOSE:To permit to eliminate trouble of cutting a formed base material after the compression forming or the like in order to insert a grip by a method wherein a core, having a thickness thinner than the height of a gap, is inserted into the gap between the fitment and the forming surface of a mold and, thereafter, the compression forming is effected. CONSTITUTION:The forming surface 1a of the mold 1 is provided with a groove at a predetermined position. A metallic retainer 2 and the metallic core 3 are received in the groove respectively by dropping or holding sequentially. In this case, the upper surface of contacting section 2a of the retainer 2 and the upper surface of the core 3 are flushed, the burring working section of contacting section of the retainer is protruded out of the forming surface 1a of the mold and a proper hollow section 3a is formed between the lower surface of the core 3 and the top surface 2c of the retainer 2. According to said constitution, a part, locating in the gap between the forming plate and the fitment, is compressed and formed under being pushed by the core 3, therefore, the faulty forming in the same part of the formed base material may be eliminated.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a compression molding method that simultaneously attaches metal fittings. The surface of a molded base material made by compression molding a molded raw material such as a matte raw material mixed with a synthetic resin, etc. is burred on the contact surface, or metal fittings such as a tener are applied at the same time as compression molding. The present invention relates to a compression molding method for manufacturing a molded product with integral fittings.

<Prior Art> Molded products with integrated metal fittings as described above are used as molded parts for automobile door parts, interior parts of ponds, and the like. When manufacturing such three-dimensional molded products, conventionally, a molding material such as a resin sheet 1 or a fibrous mat is cold compression molded or hot compression molded into a predetermined shape using a pair of male and female molds. As shown in FIGS. 4(A) and 4(B), the molded base material 25 obtained by the above process has burring parts on the contact surfaces 23a and 24a, and clip attachment holes 23d on the top surfaces 23c and 24c.
They are attached by hammering metal fittings such as hat-shaped glue retainers 23 and 24 formed with 24d, or by post-processing one or more pieces by a riveting method. Then, as shown in FIG. 4 (CL (D)), the molded product obtained by attaching the retainers 23 and 24 in this way is attached to the metal inner panel 27 of the door of the automobile using the clip 26 for fixing it. It is installed by etc.

<Problems to be Solved by the Invention> However, in the conventional method described above, the metal fittings are attached by a driving method after manufacturing the molded base material, which increases the number of man-hours and reduces processing efficiency. Also, when installing the inner panel, there are problems such as poor positional accuracy with the hole.

Therefore, the above problem can be solved by providing a groove in the mold, performing compression molding with the metal fitting embedded in the groove, and attaching the metal fitting to the molding base material at the same time as the compression molding. However, a molded product with integral fittings manufactured by such a method is formed as shown in FIG. As a result, it bulges toward the retainer side, resulting in defective molding.

<Means for solving the problems> The compression molding method of the present invention that simultaneously attaches metal fittings is as follows:
In a compression molding method that uses a pair of male and female molds to compression mold a molded material to create a molded base material, a recessed molding surface in which a metal fitting having a contact surface on which a mounting piece is formed is provided on the molding surface. Then, bring the contact surface mounting piece to the surface and drop it in. After inserting the core, which is thinner than the gap height, into the gap between the metal fitting and the molding surface while keeping it floating on the molding surface side, The gist of this method is to place a molding material on the molding surface of the mold, perform compression molding, bury the mounting piece of the fitting contacting surface in the molding base material, and then remove the core from the gap after releasing the pressure.

In addition to the above configuration, by devising the shape of the core so that the upper surface of the core held in the gap protrudes from the upper surface of the mold and compressing the molding material, the side surface of the metal fitting can be compressed. Even if the height of the part is small and it is difficult to insert the clip, the molded base material is molded into the recess only for the protruding valve of the core, and as a result, there is no need to cut down the molded base material after compression molding to insert the clip. can be eliminated.

By using the above configuration, the part of the molding material located in the gap with the metal fittings is pressed by the core and compression molded, so it is possible to eliminate molding defects in the same part of the molding base material. . In addition, since the thickness of the core is lower than the above gap height, a hollow space is formed between the core and the metal fitting after compression molding, allowing easy and smooth removal of the core from the molded product. . Furthermore, since the method involves attaching the metal fittings to the molding base material at the same time as compression molding, it is possible to solve the problems of conventional methods, such as the large number of man-hours and poor processing efficiency.

<Examples> Example 1 In FIG. 1(A), grooves 10 are provided at predetermined positions on the molding surface 1a of the mold 1, respectively. The recess @10 is formed from a retainer-contact support surface 10a, a retainer-side surface contact surface 10b, a retainer-top support surface 10C1, a core support surface 10d, and a hollow side surface 10e.

In this groove 10, there is a burring-processed contact surface 2a.
A metal glue retainer 2 consisting of a side part 2b and a top part 2C having a fixing clip attachment hole 2d, and a metal glue retainer 2 having a width slightly smaller than the side part 2b of the retainer 2 and a thickness thinner than the gap height described later. As shown in FIG. 1(B), the metal cores 3 are successively grooved or held and accommodated. At this time, as shown in FIG. 1(C), the upper surface of the contact surface 2a of the retainer 2 and the upper surface of the core 3 are flush with the mold molding surface 1a, and the burring portion of the retainer contact surface is flush with the mold molding surface 1a. An appropriate hollow portion 3a is formed protruding from the molding surface 1a and between the lower surface of the core 3 and the top surface portion 2C of the retainer 2. In addition, the above-mentioned gap is the space from the top surface of the retainer to the molding surface 1a in FIG. 1(C) (
In the same figure, the distance between the top surface of the beam retainer and the top surface of the core is the same)
refers to

Next, a compression molding process of a molded original fabric performed using the mold 1 having the above structure will be described.

First, as shown in Figure 1(D), 20II was applied to the molding surface of the mold 1.
A molding material 4 made of fibrous pine 1 to about 1 m thick is placed, and a mold 5 paired with the mold 1 is positioned on top of the molding material 4. At this time, the positional relationship in the vicinity of the retainer 2 is as shown in FIG. 1(E). Next, by moving the mold 1 upward or the mold 5 downward, the original fabric 4 is compression-molded by the molds 1 and 5 as shown in FIG. 1(F). At this time, the molded original fabric 4 becomes a molded base material 6 having a thickness of about 2 mm, which is compression molded by the molds 1 and 5, and as shown in FIG. The burred portion is buried and fixed in the molded base material 5. Here, even if the height of the burring part of the retainer-contacting surface is higher than the thickness of the molding base material, the burring part can always be kept within the range of the thickness of the molding base material 6 by the suppression of the molds 1 and 5.

When compression molding is completed, as shown in FIG. 1(H), the molds 1 and 5 are separated, the pressure is released, and the molded product with integral fittings is taken out.

The structure around the retainer in this molded product is shown in Figure 1 (I
), and then the retainer 2 and the molded base material 6
In the same figure, the core 3 in the gap is slid toward the inside of the figure or toward the back and taken out from the gap. 1(J) in the clip attachment hole 2d of the retainer 2.

Attach one side of the fixing clip 7.8 as shown in (),
If you attach the other side of the fastening clip 7.8 to the clip attachment hole 9b provided in the inner panel 9a of the door 9 as shown in FIG. 1(L), it will look like the one shown in FIG. A car door part can be created.

Embodiment 2 Next, Embodiment 2 will be explained using FIGS. 2(8) to 2(G).

In FIG. 2(^), metal divided bodies 12 each having a diameter of about 5Q mm are fitted and fixed in grooves formed at predetermined positions on the molding surface 11a of the mold 11. . The upper surface 12a of the divided body 12 is flush with the molding surface 11a, and is provided with a groove 20. Concave groove 20
It is formed of a beam tape-contact support surface 20a, a retainer-side surface contact surface 20b, a retainer-top support surface 20C1, a core support 20d, and a hollow side surface 20e.

In this groove 20, there is a contact surface 13 which is burred.
a, a side surface portion 13b, and a top surface portion 13c having a clip attachment hole 13d, and a base portion 14a that is slightly wider than the side surface portion 13b of the retainer 13 and thinner than the gap height described later. The core 14, which is thicker than the second core 14 and has a protrusion 14b located in the center, is thicker than the second core 14.
As shown in Figure (B), they are sequentially grooved or held and accommodated. At this time, as shown in FIG. 2(C), the upper surface of the contact surface 13a of the retainer 13 and the core 1
The upper surface of the base 14a of the split body 12 is flush with the upper surface 12a of the split body 12 and the mold molding surface 11a, and the burring portion of the retainer-contacting surface and the protruding portion 14b of the core 14 protrude from the upper surface 12a and the mold molding surface 11a. In addition, an appropriate hollow portion 14c is formed between the lower surface of the core 14 and the top surface portion 13c of the retainer 13. Incidentally, the above-mentioned gap refers to the space from the top surface of the retainer to the mold molding surface 11a in FIG. 2(C) (same as the space between the top surface of the beam retainer and the upper surface of the core base in the same figure). In addition, the base 1 of the core 14
The difference in thickness between 4a and the protruding portion 14b is set to be smaller than the height of the hollow portion 14c.

Next, a compression molding process of a molded original fabric performed using the mold 11 having the divided bodies 12 having the above-described structure will be described. Incidentally, since the compression molding process itself is the same as in Example 1, the following description will focus on the state near the groove 20 of the divided body 12.

First, a molding material 15 similar to that in Example 1 is placed on the molding surface 11a of the mold 11, and a mold 16 paired with the mold 11 is placed thereon. At this time, the positional relationship near the retainer 13 is as shown in FIG. 2(D). next,
When the original fabric 15 is compression-molded by moving the mold, the contact surface 13a of the retainer 13 is formed as shown in FIG. 2(E).
The upper burring part is buried and fixed in the molding base material 17, and the part of the molding base material 17 that comes into contact with the protrusion 14b of the core 14 becomes a recess 17a that fits with the core protrusion. This part is thinner than other parts.

When the compression molding is completed, the molds 11 and 16 are separated, the pressure is released, and the molded product with several metal fittings is taken out.

The structure around the retainer in this molded product is shown in Figure 2 (F
), and in this state, the core 14 placed between the tape 13 and the molded base material 17 is first moved downward in the same figure, and its protrusion 14b is moved into the recess 1 of the molded base material 17.
7a, and then slide it toward the front or back in the figure to take it out. Then, attach a clip 18 to the clip attachment hole 13 (I) of the retainer 13 as shown in FIG.
Press one side of the holder and insert it. At this time, even if the height of the clip portion on one side of the fixing clip 18 is higher than the height of the contact surface portion 13a and the top surface portion 13c of the tape 13, the clip 18 is held up without any support by the recess 17a of the molded base material 17. Needless to say, it is also possible to attach the device to one side.

Note that instead of directly forming grooves for embedding metal fittings, etc. on the molding surface of the mold as in Example 2, a split body having a similar groove and detachable from the mold may be used. By doing this, even if the molding shape changes and the mold is changed, the same compression molding can be performed using the same divided body by simply forming a groove for embedding the divided body in the mold. , mold processing costs can be kept low by the concave groove processing valve. In addition, if it is not necessary to attach metal fittings to the molding base material, it is possible to use the same mold by inserting a divided body that does not have a groove in the surface of the mold for embedding the divided body. Another advantage is that two types of molded products can be made.

Embodiment 3 This Embodiment 3 is the same as Embodiment 2 except for the shape of the core used, the shape of the groove, and the state of accommodation of the core in the groove, so only the differences will be explained in the following description.

As shown in FIG. 3(A), the entire upper surface 21a, which is the side surface of the molding surface of the core 21, has an arcuate raised shape. The arcuate surface of this upper surface 21a corresponds to the protrusion 14 of the core 14 used in Example 2, as shown by the dotted line in the figure.
b includes both end lines extending in the width direction of the core. Also,
The opposite surface of the core 21 is formed with a lower surface 21b concave in the shape of an arc at the center and a pair of planar seating surfaces 21c and 21d located on both sides of the lower surface 21b. Here, the upper surface 21a and lower surface 21b of the core 21 are concentric circular arc surfaces. On the other hand, the groove 3 in which the core 21 is accommodated and held
The core support surface of 0 is flush with the top support surface. Furthermore, the thickness at both ends in the longitudinal direction of the core is the same as the depth of the core supporting surface of the groove 30. Therefore, when the core 2] is accommodated in the groove 30, the bearing surfaces 21c, 21 of the core 21
d is in contact with and supported by the core support surface of the concave groove 30, while the lower surface 211) is located above the top support surface, and the upper surface 21a is connected to the upper surface 32a of the divided body 32 and the mold molding (not shown). It will protrude from the surface. The fS structure around the retainer in the molded product with integral fittings obtained by compression molding the original fabric using this core 21 in the same manner as in Example 2 is
As shown in FIG. 8, the core 21 is taken out from between the molded base material recess and the retainer top surface by moving it in its longitudinal direction or in the arcuate direction of the upper surface 21a.

<Effects of the Invention> The compression molding method of the present invention is one of the methods described above, in which the portion of the molded original fabric located in the gap with the retainer is compressed and molded by being pressed by a core during compression molding,
As a result, molding defects in the portion of the molded base material located in the gap with the retainer are eliminated, and this portion can be compression molded in the same manner as other portions. In addition, since the metal fittings are attached to the molded base material at the same time as compression molding, all of the problems of the conventional method described above can be solved, and the metal fittings can be accurately attached to the predetermined position on the molded base material in one step at the same time as compression molding. In addition to eliminating the need for post-processing and greatly improving production efficiency,
For example, it is possible to prevent the tip of the burring part of the retainer from protruding onto the surface of the molding base material, and the surface can be molded flush.

Furthermore, the present inventor has confirmed that the strength of attaching the metal fittings to the molded substrate can be significantly increased compared to the conventional method. To explain this improvement in mounting strength in detail, using a retainer that has a total of eight burrings, four on each of the left and right contact surfaces, as in the retainer used in the embodiment, the metal fittings can be attached using the conventional method. When manufacturing a molded product with integral parts, the installation strength of one retainer is 32 to 35!
IJ (4 to 4.5 kg for one burring part)
On the other hand, in the case of the present invention, it is 55 to 60 kq (
(7 to 7.5 kg), and the mounting strength was improved by about 1.7 times compared to the conventional method.

[Brief explanation of the drawing]

Figures 1 (A) to () are explanatory diagrams of Example 1 of the present invention, and Figures 2 (A) to (G) are the same. Figures 3 (A) and (B) are the same. ) is an explanatory diagram of Example 3, FIG. 4(A) ~
(D) and FIG. 5 are explanatory diagrams of the prior art. 1,'5,11.16...Mold, 2,13.23゜2
4.31... Retainer-13, 14, 21... Core, 4, 15... Molded original fabric, 6, 17.25° 29.3
5... Molded base material, 7.8.18.26... Attachment clip, 10.20... Concave surface, 12... Divided body, 2
7...Inner panel. Figure 1 (D) Whistle 1 Figure (F) Figure 1 (E) Melting I Figure/(G) Figure 5 Procedures Manual (voluntarily submitted) 2. Name of the invention Compression molding method that simultaneously attaches metal fittings 3. Relationship with the case of the person making the amendment Patent applicant Address: 2-4-14 Toyo, Koto-ku, Tokyo Name: Mitsui Mokuzai Co., Ltd. 4, Agent: 104 Address: 8-12-15, Ginza, Chuo-ku, Tokyo (1) Correct Figure 3 (8) as shown in the attached sheet. Figure 5 above

Claims (1)

[Claims] 1. In a compression molding method for producing a molded substrate by compression molding a molded material using a pair of male and female molds, a metal fitting having a contact surface portion on which a mounting piece is formed is placed in the mold. A state in which the contact surface mounting piece is dropped into the groove provided on the molding surface with its contact surface part exposed to the surface, and a core with a thickness thinner than the gap height is suspended in the gap between the metal fitting and the molding surface toward the molding surface side. After holding and putting the core into the mold, the molding material is placed on the molding surface of the mold, compression molding is performed, the mounting piece of the fitting contacting surface is buried in the molding base material, and after the pressure is released, the core is taken out from the gap. A compression molding method that attaches metal fittings at the same time. 2. The core has a protrusion formed in the center of the molding surface side,
2. The compression molding method according to claim 1, wherein the protruding portion is made to protrude from the molding surface of the mold on the side of the molding material. 3. The side surface of the mold forming surface of the core is raised in an arc shape and protrudes from the mold forming surface toward the molding material side, and the surface opposite to the side surface of the mold forming surface is arc-shaped and concentric with the side surface of the mold forming surface. 2. The compression molding method according to claim 1, wherein the compression molding method is recessed.