SU977170A1 - Injection mould for moulding shaped products - Google Patents

Description

(54) PRESS FORM FOR FORMING FIGURES

PRODUCTS

one

The invention relates to the pressing of ceramic products such as a plate and can be used in the refractory, porcelain and facial and building materials industries.

A mold comprising a die, an upper punch and a composite lower punch, made of coaxially arranged inner and outer elements 1, is known.

The disadvantage of this mold lies in the difficulty of removing the product and in the absence of air access to the pressed product.

Closest to the present invention is a mold for molding shaped articles comprising a matrix, an upper punch and a composite lower punch, made of coaxially arranged inner and outer elements 1.

A disadvantage of the known mold is the low quality of the products, since there is no air flow to the workpiece at the moment of raising the upper punch, which is why the air in the pressed product goes into the zone with less pressure and destroys the product, forming microcracks .

The purpose of the invention is to improve the quality of products.

The goal is achieved by the fact that in a mold for molding shaped articles containing a matrix, an upper punch and a composite lower punch, made of coaxially arranged inner and outer elements, the matrix is made integral in the form of a cup with an inner ring groove and grooves located in its lower part is parallel to the vertical axis, and a spring-loaded ring with plugs in the grooves of the glass, and the upper punch is provided with a stop and is spring-loaded relative to the glass.

15

The drawing shows the proposed mold.

The mold contains an upper punch 1 with a stem-limiter 2 and a lower punch consisting of an external 3 and an internal 4 elements. The matrix is made integral in the form of a glass 5 with an internal annular groove 6 and grooves located in its lower part parallel to the vertical axis and the spring-loaded ring 7

with pins 8, which are included in the grooves of the glass, and the upper punch is provided with a stop and is spring-loaded with a spring 9 relative to the glass.

The mold works as follows.

When raising the upper punch 1 into the lower punch 3 and the ring 7 protruding above the lower punch, the pressed material is filled up. Then the cup 5 is lowered, which is guided (centered) with the help of the guide pins 8 relative to the lower punch 3 and moves the ring 7 to the lower position. During the course of the glass 5 down the air through the annular recess 6 leaves the pressing zone - the space between the upper and lower punches. At the moment of contact of the upper punch 1 with the compression material, the spring 9 deforms to the size of the gap A and the pressing process begins. In this case, the inner annular groove 6 is located below the pressing zone.

At the end of the pressing time, the working force is relieved on the cup 5. The latter, under the action of the spring 9, rises and the annular groove 6 communicates the pressing zone with the atmosphere. With the passage of the gap L glass 5 using the limiter 2 moves the upper punch 1 to the upper position. By displacing the inner element 4, the pressed product is removed from the mold. When the element 4 is seated in the lower punch, the mold is ready for the next pressing cycle. The use of the proposed mold improves the quality of the pressed product by timely supplying air to the pressing zone, which eliminates microcracks on the surface of the pressed product while lifting the upper punch.

Claims (2)

1. USSR author's certificate No. 100104, cl. B 28 B 3/04, 1951. 2. USSR author's certificate No. 528202, cl. In 28 3/04, 1974 (prototype).