JPS58162311A - Forming method of corrugated rough surface - Google Patents

Abstract

PURPOSE:To reduce the cost for manufacturing mold by a method wherein an elastic plate of rubber or resin having a corrugated rough surface on one side is stuck on the lower surface of a compression molding top force and/or the upper surface of a bottom force and powder material or kneading substance is molded by compression by this elastic plate. CONSTITUTION:The flat surface of an elastic plate 2 of rubber or resin having a corrugated rough surface on one side is stuck as an adhesive surface to the lower surface of a compression molding top force 1, a bottom force 4 is inserted into an outside mold 3, a fixed quantity of powder material 6 is put horizontally in the cavity made by the bottom force and outside mold, molded by compression by the top force 1 and the bottom force 4 to obtain a molded body 17. This method needs no corrugated rough surface formed on the mold and can reduce cost for manufacturing a mold and this mold can be used as a general die after the elastic plate has been peeled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding method for forming a rough surface on both sides or one side of a molded article, and it is possible to easily and inexpensively mold a rough surface with a rough surface in the same shape. After sintering, it is bonded to other parts to provide strong adhesive strength and is used for automobile parts, machine parts, cutting tools, etc.

In order to firmly bond dissimilar or hard materials together using an adhesive, it is necessary to form the contact surface with the adhesive into a rough surface. Attach a thick dot-like aneurysm.

After sintering, it can be used by bonding it to other parts with adhesive.

Alternatively, to form a fired crystal, a method of roughening the surface using a grinding wheel, sandblasting, etc. has been adopted.

However, with these methods, it is difficult to efficiently manufacture a large number of pieces with the same rough surface, high processing costs are unavoidable, and the adhesive strength of the bonding surface is not uniform over the entire surface, making it difficult to manufacture strong products. It had some disadvantages.

The present invention has been made in consideration of eliminating the above-mentioned drawbacks, as well as reducing the manufacturing cost of a molding die and using the molds together. The smooth surface of a rubber-based or resin-based elastic plate with one side having a rough rough surface is adhered to the upper surface of the mold as an adhesive surface, and the powder or kneaded material is pressure-molded using this to form the upper and lower surfaces or one side of the +5 shape. It is characterized by forming an uneven and rough surface on the surface.

The hardness of the rubber-based or resin-based elastic plate to be adhesively bonded to the mold is preferably H850 to H90.

The uneven and rough surface of the elastic plate is 0.2 in height on the entire surface of two sides.
~3m, with a pitch of 0.3~5cm, formed in an inner basket or square male shape, has excellent press formability and strength of adhesion to other parts of the sintered layer via adhesive. showed that.

In addition, the reason for using this rubber-based or resin-based elastic material is that it can be poured into a mold of the desired shape to easily form the necessary rough surface, and the material hardness is H350 ~
This is because within the range of 90, the density of the uneven rough surface portion of the press-formed product becomes uniform, and the molding and mold release properties are good.

In the present invention, since the above-mentioned elastic body is used by adhering it to a molding die, there is no need to process the mold to form a rough surface, which reduces the mold manufacturing cost, and even after the elastic body is peeled off, it can be used for general molding. It can be applied as a body mold.

In the above description, it is described that the rubber-based or resin-based elastic plate is manufactured by pouring it into a mold, but in addition to that, there are also existing belts that have regular uneven surfaces, such as conveyor belts made of nylon or composite materials thereof. It was usable and a good rough surface could be formed.

The materials to be press-molded using the mold of the present invention include powder and kneaded materials, but since the shape of the powder is uneven when press-formed, it is difficult to replace the material with a new elastic plate. It is necessary to use it.

The present invention will be explained below with reference to examples, but it is not intended to be relied upon thereto within the scope of the gist of the present invention.

FIG. 1 shows the molding method of the present invention.

Figure A is a cross-sectional view before pressurization, Figure B is a cross-sectional view after pressurization, 0
The figure shows the perspective view of the molded product after demolding, and will be explained using these figures.

Molded object dimensions 22.0x22. Ox6. A powder press mold for OL-■ was prepared. 1 in the figure is the upper mold;
Elastic body plate described below 2. A lower mold 4 was inserted into the outer mold 3, a certain amount of powder 6 was placed horizontally therein, and molding was carried out between the upper mold 1 and the lower mold 4 under a pressure of 400 mm.

Example 1 - Height dimension 1.6ws and pitch 1.6! Two types: one with a conical shape with II spacing dimension and the other with a hexagonal pyramid-shaped uneven surface 5
- A prototype was created in which the marks were formed on the entire top surface of each plaster mold.

A natural rubber solution with additives is poured into this plaster mold to a thickness of 5. I made each Owm rubber i. The hardness of this rubber was H360. Nine pieces of the mold were adhered to each of the above-mentioned upper molds, and ZrO2 powder was press-molded. At this time, both molding and mold release properties were good.
The compaction density was also uniform. This was sintered and bonded to cast iron using an epoxy resin adhesive, and dried at 80° C. for 2 hours.

Example 2 A plaster mold prototype was produced in the same manner as in Example 1, having a conical shape with a height of 2.6 wm and a pitch of 4.2 cm, and a hexagonal pyramid-shaped uneven surface.

A polyester-based urethane resin solution with a curing agent added to it was poured into the plaster mold to produce plates each having a thickness of 5.01 mm. This hardness was H372. When these tl were adhered to the upper die of a mold and ZrO2 powder was pressure molded, the molding and mold releasability and compaction density were good. It was laminated with cast iron using an epoxy resin adhesive and dried for 2 hours at 80°C.

Example 3 An existing nylon belt (hardness H381) having conical concave and convex surfaces with a height of 0.5 cm and a pitch of 1.5 cm was cut to the size of a mold and used by adhering to the mold. When the ZrO2 powder was pressure molded in the same manner as in Example 1, the molding and mold release properties and compaction density were both good. After sintering, this was bonded to cast iron using epoxy resin and dried at 80° C. for 2 hours.

Comparative Example Using the above-mentioned mold without laminating the elastic body, a flat plate of ZrO2 was molded with the same pressure as in the example, and sintered to a glossy finish. This was bonded to cast iron using an epoxy resin adhesive and dried for 2 hours at 80°C.

The adhesive strength of the above Examples and Comparative Examples was measured using a universal testing machine manufactured by Shinko Tsushin, and is shown in the table below.

The number of samples measured above was five each, and the samples of Examples 1 and 2 included measurements of three conical and two pyramid shaped samples with rough surfaces.

As mentioned above, the shear strength of the product manufactured using the molding method of the present invention and bonded to other parts with adhesive is more than 50% higher than the shear strength of the flat adhesive of the comparative product, and the present molding method is inexpensive and easy. A large amount of fresh blood can be produced.

[Brief explanation of the drawing]

Figure A in Figure 1 is a sectional view of the press die before pressurization. Figure B is a sectional view after pressurization, and Figure 0 is a perspective view of the molded body. 1... Upper mold, 2... Elastic body, 3... Outer mold, 4...
・Lower mold. 5... Adhesive, 6... Powder, 16... Pressurized product, 1
7... Molded object. 71- Figure 1 (A)

Claims (1)

[Claims] 1. 1 on the lower surface of the upper mold and l or the upper surface of the lower mold of the press molding die.
The smooth surface of a rubber-based or resin-based elastic plate with a rough rough surface on one side is used as an adhesive surface, and the powder or kneaded material is pressure-molded in a mold to form a rough rough surface on both the upper and lower surfaces or on one side of the molded product. A molding method characterized by forming. 2. A molding method for forming an uneven rough surface, characterized in that the rubber-based or resin-based elastic plate according to claim 1 has a hardness of H850 to H90. 3. A molding method for forming a rough surface of a rubber-based or resin-based elastic plate according to claim 1, characterized in that the rough surface of the rubber-based or resin-based elastic plate has a conical or pyramidal shape. 4. A molding method for forming an uneven grain surface according to claim 1 or 13, characterized in that the uneven dimensions of the rough surface are 0.2 to 3 cm in height and 0.3 to 5 cm in pitch. . 5. Glue the smooth surface of a rubber-based or resin-based elastic plate, which has an uneven rough surface on one side, to the lower surface of the upper mold and/or the upper surface of the lower mold as an adhesive surface, and use this to remove powder or cross-wire materials. A sintered body with an uneven rough surface formed on one side by pressure molding and firing is formed, and the uneven rough surface of the sintered body is used as an adhesive surface to be fixed to other members via an adhesive. A molding method that creates an uneven and rough surface.