JPS60166429A - Compression type mold - Google Patents

Abstract

PURPOSE:To obtain a compression mold, which has excellent moldability while a molding cycle thereof can be shortened, by mounting a sliding cylinder section to the outer circumference of either one of a top force or a bottom force while fitting a section to be slid to the outer circumference of the other. CONSTITUTION:A top force 1 is moved upward and separated from a bottom force 2, and a molding material 14 consisting of a synthetic resin is charged into the recessed section 12 of a cavity. The top force 1 is lowered and a section to be slid 5 is inserted into a sliding cylinder section 4, and the inside of the space 3 for suction and the cavity section are brought to negative pressure through suction from a suction port 7 after a point of time when the section to be slid 5 begins to intrude into the sliding cylinder section 4. The top force 1 is further lowered, the top force 1 is conformed to the bottom force 2, the molding material 14 in the recessed section 12 is pushed by a projecting section 13, and the molding material 14 is spread over the whole in the cavity. Suction is also continued from the suction port 7 at that time. Compression molding is completed, a molded shape is formed, the top force 1 is elevated, molds are released, and the molded shape is extracted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an improvement in the structure of a mold for compression molding.

[Background technology]

In the conventional compression molding mold (5), as shown in Fig. 1, the upper mold (1)' and the lower plate (9) are attached to the upper plate (8).
The lower mold (2)' attached to
A silicon round cutter (10) was provided on the outer periphery of the lower surface of the upper mold (1), and a silicon round cutter (1) was provided opposite to the silicon pipe (1o).
)' into the recess (I4), lower the upper mold (2)' to match the lower mold (2)' and upper mold (1)', and place the upper mold into the recess θ4. Convex part (13) of mold (1)'
Insert the silicon pipe (10) and the silicon round link (
11) were compressed and molded in a sealed state. However, in such a conventional example, since the molding material is piled up by compressing force alone, there is a drawback that if the molded product has a large start-up height, it may not be filled sufficiently. Since it is difficult to form a line, it has to be compressed for a long time, resulting in a long molding cycle, and it is also difficult to remove the nozzles, resulting in poor moldability.

[Purpose of the invention]

The present invention has been made in view of the above points, and an object of the present invention is to provide a compression molding mold that has good moldability and can shorten the molding cycle.

[Disclosure of the invention]

The compression molding mold of the present invention has an upper mold (11) and a lower mold (2) arranged so as to face each other vertically.
) A slide cylinder part (4) is provided outwardly on one of the sides through the suction space (3), and a slidable part (6) that can come into sliding contact with the inner surface of the slide cylinder part (4) is provided outwardly on the other side. A sealing material (6) is attached to the inner circumference of the slide cylinder part (4) or outward of the slid part (5) to seal the sliding contact area between the slide cylinder part (4) and the slid part (5). , a suction port (7) communicating with the suction space (3) is provided in the slide cylinder portion (4), and the drawbacks of the conventional example are solved by configuring as described above.

The present invention will be explained in detail below with reference to Examples. (2) is a lower mold, which is attached to the upper surface of the lower plate (9). This lower mold (2
) has a concave portion θ in the center of the upper surface thereof, and a slide cylinder portion (4) is provided protruding from the outer periphery of the lower mold (2) via a suction space (3). A sealing material (6) made of an O-link or a V-type cowl is attached to the inner circumference of the upper part of the slide cylinder part (4), and a suction port (7) is bored in the lower part of the slide cylinder part (4). It is. (1) is an upper mold, which is attached to the lower surface of the upper plate (8). A convex portion θ3) of the upper die (1) is formed at the center of the lower surface of the upper die (1), and a slidable part that can come into sliding contact with the inner circumferential surface of the slide tube (4) is formed on the outer periphery of the upper die (1). Section (5) is provided.

Next, the operation of molding a synthetic resin molded product using the compression molding mold hole configured as described above will be explained. As shown in Fig. 3(a), move the upper mold (1) upward and separate it from the lower mold (2), then press the molding material (I
4) Insert. Next, the upper mold (1) is lowered and the slidable part (6) is pushed into the slide cylinder part (4) as shown in FIG. ) From the time it begins to enter, suction is performed from the suction port (7) to create a negative pressure in the suction space (3) and the +12-point tee.

Following this, lower the upper mold (1+) and
), align the upper mold (11) with the lower mold (2) and press the molding material Q4) in the four parts θ4 with the convex parts θ3) to apply the molding material θ4) to the entire inside of the 10th plate. Let me page it. At this time, suction is continued from the suction port (7). After the compression molding is completed and a molded product is formed, the upper mold fil is raised upward and the mold is opened to take out the molded product. In the above embodiment, the lower mold (2
) was provided with the slide cylinder part (4), and the upper mold (4) was provided with the slid part (5), but the upper mold fi+ was provided with the slide cylinder part (4).
), and the lower die (2) may be provided with the slidable portion (5).

〔Effect of the invention〕

Since the present invention is constructed as described above, the molding material is put into the gap between the upper mold and the lower mold, and the upper mold and the lower mold are matched to perform compression molding. It is possible to suction the molding material through a space, and it is possible to obtain a complete molded product by suctioning the molding material, and even for a molded product with a large rise, the molding material can be sufficiently spread to the edges, and it is possible to obtain a complete molded product. The molding cycle can be shortened because the lines are filled in a short time, and the gas can be smoothly released by suction, improving moldability.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional example, FIG. 2 is a sectional view of an embodiment of the present invention, and FIG. ) is the upper mold, (2) is the lower mold, (
3) is a suction space, (4) is a sliding tube part, (5) is a slidable part, (6) is a sealing material, and (7) is a suction port. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 Figure 2 Figure 3 (0) 8 7/

Claims (1)

[Claims] ++') The upper mold and the lower mold are arranged so as to face each other vertically, and a slide cylinder part is provided on the outer periphery of either the upper mold or the lower mold through a suction space, and a sliding cylinder part is provided on the outer periphery of the external force. A slidable part that can come into sliding contact with the inner surface of the slide cylinder is provided, a sealing material is installed inside the slide cylinder or on the outer periphery of the slidable part to seal the sliding contact between the slide cylinder and the slidable part, and the slide A compression molding mold characterized in that a cylindrical portion is provided with a suction port that communicates with the suction space.