JPS6217538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a simultaneous overlay compression molding method and apparatus, and more particularly to a method and apparatus for sandwiching a molding material and an overlay material between an upper mold and a lower mold and compression molding the two.

Recently, as shown in FIG. 1, an overlay molded product 10 in which a molding material portion 12 and an overlay 14 are integrally compression molded at the same time has come to be manufactured. Conventionally, this overlay molded product 10 is produced by overlaying a molding material 16 and an overlay material 18 between a simultaneous compression molding device 20 having an upper mold 22 and a lower mold 28, as shown in FIG. By closing both the molds 22 and 28 and performing compression molding, shaping into a predetermined shape and laminating and bonding the overlay material 18 are performed all at once. As the molding material 16, thermoplastic resin,
Reinforced thermoplastic resins, thermosetting resins, reinforced thermosetting resins, etc., or composite materials of one or more of these may be used. When using thermoplastic resin as the main material, the molding material 16 is heated in advance to make it flowable during compression molding, creating a so-called heated blank, which is then placed between the upper mold 22 and the lower mold 28. and perform simultaneous compression molding. As the overlay material 18, a sheet or film made of metal, fiber products, synthetic resin products, or composite products thereof is used. As described above, this overlay material 18 is laminated and bonded to the molding material 16 to form its surface. Therefore, the material is appropriately selected depending on the function required of the final molded product, such as reinforcing function or decorative function.

By the way, the molding material 16 and the overlay material 1
8 is sandwiched between the upper mold 22 and the lower mold 28 and compression molded simultaneously, the overlay material 1 is compressed by the flow of the molding material 16 during compression molding.
8 moves irregularly, which has conventionally caused problems such as wrinkles in the overlay portion. Therefore, the present inventors first divided the lower mold 28 into a molding part 30 and an outer shell part 32, as shown in FIG. and
As a result, just before the molding material 16 is compressed and flows, the peripheral portion 38 of the overlay material 18 is sandwiched between the outer shell portion 32 and the peripheral end surface of the upper mold 22 and held with an appropriate pressure. A method and apparatus for simultaneous overlay compression molding are provided. Using this method and apparatus 20, the periphery 38 of the overlay material 18 is retained as the molding material 16 is compressed and flows;
Wrinkling or the like on the overlay material 18 can be reliably prevented. However, in order to do so, the peripheral portion 38 of the overlay material 18 must be
4 and 30 must be allowed to protrude outward. Therefore, as shown in Figure 3,
When removed from the apparatus 20, a peripheral portion 38 of overlay material remains attached to the outer periphery of the molded article 10. Unless this peripheral portion 38 is subjected to some treatment, such as being cut out, it is not possible to obtain the completed overlay molded product 10 as shown in FIG. 1. Therefore, the conventional overlay simultaneous compression molding method and apparatus 2 shown in FIG.
Although the method No. 0 certainly prevented the overlay from wrinkling, it had the disadvantage that post-processing after compression molding was troublesome.

This invention was made in view of the above-mentioned conventional problems, and its purpose is to provide a simultaneous overlay compression molding method in which a molding material and an overlay material are sandwiched between an upper mold and a lower mold and compression molded. In the equipment, it is possible to reliably prevent the overlay from wrinkling caused by the flow of the molding material during compression molding, and it is also possible to immediately obtain a completed overlay molded product without any troublesome post-processing. An object of the present invention is to provide a method and apparatus for simultaneous overlay compression molding.

In order to achieve the above object, the method of the present invention first provides a method for obtaining an overlay molded product by stacking a shearable overlay on a molding material and compression molding the materials simultaneously in the same mold. While the molding material flows under the molding compression load, the outer peripheral edge of the overlay material is clamped, and after molding is completed, the part of the overlay molded product in the mold and the clamped outer peripheral edge of the overlay material are held together. The overlay molded product is separated from the outer circumferential end by shearing by moving the parts relative to each other, and then the overlay molded product is removed from the molding apparatus.

Next, the apparatus of the present invention is an overlay simultaneous compression molding apparatus that sandwiches a molding material and an overlay material between an upper mold and a lower mold and compression molds both.
The outer parts of the molding parts of the upper mold and the lower mold are each divided so that the peripheral part of the overlay material is sandwiched between the opposing surfaces of each outer part, and
A driving device is provided to independently move each outer shell portion relative to the upper mold and the lower mold in a direction coaxial with the moving direction of the upper mold and the lower mold, respectively, and the overlay material can be sheared by driving this driving device. It is characterized by what it did.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings. Note that common or corresponding parts in each figure are indicated using the same reference numerals.

FIGS. 4A, B, C, and D show an embodiment of the apparatus used to carry out the simultaneous overlay compression molding method according to the present invention. The apparatus 20 shown in the figure shows the states of each process in order. In the figure, first, an upper mold 22 and a lower mold 28 constitute a mold section for simultaneous overlay compression molding. In the case of the embodiment shown in the figure, the upper mold 22 is pushed down toward the lower mold 28 by a drive device (not shown) such as a hydraulic device, so that the molding material 16 is compression molded together with the overlay material 18. It is configured as follows. The lower mold 28 is
Similar to the conventional example shown in FIG.
and an outer shell part 32 are formed separately, and the outer shell part 32 is adapted to be moved and driven independently by a drive device 36 using a hydraulic device or the like. In this invention, the molding portion 2 of the upper mold 22 is also
4 and an outer shell 26 are divided in the same way as the lower mold 28, and the outer shell 26 is adapted to be independently driven vertically by a drive device 34 such as a hydraulic device. In other words, the mold part for molding is the upper mold 22.
The outer shell portions of the molding portions 24 and 30 of the lower mold 28 are each divided, and the peripheral portion 38 of the overlay material 18 is sandwiched between the opposing surfaces of the outer shell portions 26 and 32. Outer part 2
The overlay material 18 is sheared by independently moving and driving the upper mold 22 and the lower mold 28 in the same axial direction as the moving direction of the upper mold 22 and the lower mold 28, respectively. ing. The outer shell portions 26, 32 and the molded portions 24, 30 are tightly fitted. Note that the overlay material 18 used is a sheet-like or film-like material made of metal, textile products, synthetic resin products, or composite products thereof, and any of these materials drive the outer shell parts 26 and 32 to move. Those that can be sheared by the drives 34, 36 are selected.

Now, in the simultaneous compression molding apparatus 20 configured as described above, first, as shown in FIG. 4A, the molding material 16 and the overlay material 18 are placed between the upper mold 22 and the lower mold 28. Next, as shown in FIG. B, the upper mold 22 is pushed down, and
Before the molding material is compressed and flows, the outer shell 26 of the upper mold 22 is advanced downward, and the peripheral part 38 of the overlay material 18 is placed between the opposing surfaces of the two outer shells 26 and 32. Clamp and hold with appropriate pressure. Thereafter, as shown in FIG. C, the upper mold 22 is further pushed down to apply a compression molding load to the molding material 16 and overlay material 18 at the same time. At this time, the molding material 16 flows due to the molding load, but since the peripheral portion 38 of the overlay material 18 is held as described above, the molding material 16 does not become wrinkled or the like. 16 to form a defect-free overlay. After compression molding is performed in this way and the molded shape is fixed after a necessary cooling period, the upper mold 22 and the lower mold 28 are opened, as shown in FIG. First, the two outer shells 26 and 32 are driven slightly upwardly relative to the molds 22 and 28 while holding the peripheral portion 38 of the overlay material 18 between them. This allows the peripheral portion 38 of the overlay material 18 to be easily sheared away from the molded part. Therefore, mold 2
2, 28 and taken out by the ejector mechanism 44 is the molded product 1 from which the peripheral portion 38 of the overlay material 18 has already been removed, as shown in FIG.
It is 0. That is, here, the completed molded product 10 can be immediately taken out from the overlay simultaneous compression molding mold section.

Note that the inner circumferential surfaces of the outer shell portions 26 and 32 can also function as mold surfaces that form the outer circumferential surface of the edge 42 of the molded product 10. Therefore, in the case of the embodiment described above, the molded article 10 can be given the shape of the edge 42 as shown in FIG.

FIGS. 6A, B, C, and D show other embodiments of the present invention. The device 20 shown in the figure is
Its basic configuration is the same as the embodiment described above.
However, the mold shapes of the molding parts 24 and 30 are different, the overlay material 18 is positioned below the molding material 16, and the overlay material 18 is formed in advance by vacuum forming or the like to approximate the shape of the molded product. The difference is that they are molded into different shapes. In this apparatus 20, a molded article 10 having a cross-sectional shape as shown in FIG. 1 is molded. Again, as in the previous embodiment, the outer shells 26, 32 are moved slightly up and down at the end of the compression molding process to create a final product with the periphery 38 of the overlay material 18 removed. Molded products can be obtained immediately.

In addition, in the embodiment described above, the overlay molded product 10 having a two-layer structure was obtained, but for example, the seventh
As shown in FIG. A, an insert material 40 can also be pre-embedded within the molding material section 12. Moreover, as shown in FIG. 1B, overlays 14, 14 can of course be laminated and bonded to both sides of the molding material 12. Figure 8 shows the 7th
The state in which the molded article 10 shown in FIG. B is molded using the compression molding apparatus 20 according to the present invention is shown.

As described above, with the overlay simultaneous compression molding method and apparatus according to the present invention, the peripheral part of the overlay material can be easily sheared at the end of the compression molding process without producing defective products such as wrinkles in the overlay. Because it can be processed by
Overlay molded products of uniform quality can be manufactured with extremely high efficiency.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an example of an overlay molded product, Fig. 2 is a cross-sectional view showing an example of a conventional molding device, and Fig. 3 is a cross-sectional view showing an example of a molded product obtained using a conventional molding device. 4A to 4D are sectional views showing one embodiment of a molding apparatus according to the present invention, FIG. 5 is a sectional view showing an example of a molded product obtained using the molding apparatus according to the present invention, and FIG. A-D
7A and 7B are partial sectional views showing examples of other molded products obtained by the molding apparatus according to the invention, and FIG. 8 is a sectional view showing another embodiment of the invention. FIG. 3 is a sectional view showing one state of use. DESCRIPTION OF SYMBOLS 10... Overlay molded product, 12... Molding material part, 14... Overlay, 16... Molding material, 18
...overlay material, 20...simultaneous compression molding device,
22... Upper mold, 24... Molding part, 26... Outer part, 2
8... Lower mold, 30... Molding part, 32... Outer part, 3
4, 36... Drive device, 38... Periphery of overlay material, 40... Insert material, 42... Edge, 4
4...Ejector mechanism.

Claims (1)

[Claims] 1. A method for obtaining an overlay molded product by overlaying a shearable overlay material on a molding material and simultaneously compression molding it in the same mold, wherein at least the molding material is subjected to a molding compression load. While flowing, the outer peripheral edge of the overlay material is clamped and held with appropriate pressure, and after molding is completed, the part of the overlay molded product in the mold and the clamped outer peripheral edge of the overlay material are separated. A method for simultaneous compression molding with carverlay, characterized in that the part of the molded product and the outer circumferential end are separated by shearing by moving them relative to each other, and then the overlay molded product is taken out from the mold. 2. In an overlay simultaneous compression molding device that sandwiches a molding material and an overlay material between an upper mold and a lower mold and compression molds both, the outer part of each molding part of the upper mold and lower mold is divided into two parts. The periphery of the overlay material is sandwiched between the opposing surfaces of the overlay material, and each outer part is independently moved relative to the upper mold and the lower mold in a direction coaxial with the moving direction of the upper mold and the lower mold. An overlay simultaneous compression device, characterized in that it is provided with a moving drive device, and the overlay material can be sheared by driving the drive device.