SU70124A1 - The method of forming the bottom of the shoe and the mold for its implementation - Google Patents

Description

The existing method of forming the bottom of the shoe in the molds is not sufficiently effective.

The proposed method of forming the bottom of the shoe has the feature that in order to eliminate rubber waste during molding, avoid burrs, etc., the rubber mixture is injected into a pre-closed mold chamber.

To implement the method of extrusion, a mold is proposed in which the punch and the sliding matrix are fixed on the base motionless and together with the block form a chamber closed on all sides.

Raw rubber is injected through the mouthpiece into which it is fed under pressure from a syringe.

For this purpose, the block or punch must have a channel into which the mouthpieces are inserted to fill the mold chamber with raw rubber.

FIG. I depicts the mold in longitudinal section; in fig. 2 shows a top view of a press matrix 17

forms; in fig. 3 is a cross section of the mold and in FIG. 4 depicts a mold for high boots.

The pressforma1a consists of a base 72, to the middle part of which a punch 9 is rigidly attached with an electric heater 70 and a pillow 77. Along the glass of the punch are the halves S, 8a of the die, placed in the guides 7 attached to the base 72. In the reduced position, the matrix tightly encloses the contour of the punch, forming together with it a closed form along the perimeter.

Pushing the halves S, Sa of the matrix is made by turning the handwheel 17, acting through the screw IS and the nut on half 6 and the rocker 19. The matrix can also have electric heaters in the lower part. Along the edges of the base 72 are columns 5, fastened with nuts. In the upper part of the column there are lugs for fingers 3, fixed in the beam 4. In the middle part of the beam, a threaded TZ is pressed in.

2 ;: 9

clamping screw 14, which serves to lift and press the pad 6 with the workpiece to the matrix.

At the upper end of the screw 14, a handwheel is fitted / with a muff 2, limiting the values of} / downforce.

The mold of FIG. 4 for high boots differs from the one described above only by the reverse arrangement of the punch 9 and the die 8 and the use of a flap pad 6 connected to the base 72 by the hinge 15.

In this case, in the block 6, the entire form is pressed with the help of a handwheel T connected to a screw 14 placed in a sleeve 13 attached to the base 72.

Block 6 has a through channel in the pith portion for inserting the mouthpiece.

Molding the bottom of the shoe in the molds; following image. On the block 6 put on the workpiece, after which the rotation of the handwheel 7, the workpiece with the block is pressed against the mold laatritz. Then the pads of the syringe machine are inserted into the channel and the raw rubber is fed into the mold chamber. After filling the chamber with rubber

the mouthpiece channel is closed and the rubber supply is stopped.

The molded bottom of the shoe is pressurized for the required time in the mold for vulcanization.

Subject invention

Claims (3)

1. A method of forming the bottom of a shoe by pressing a raw rubber mixture in a mold followed by vulcanization of the finished sole, characterized in that with neJibio eliminating rubber waste during molding, avoiding burrs and so on. The rubber mixture is injected into the hermetically sealed mold chamber. 2. A press mold for carrying out the method according to claim 1, characterized in that the punch 9 and the sliding matrix are fixed on the base 72 fixedly and together with the block 6 form a chamber closed on all sides. 3.Video change on PP. 1 and 2, characterized in that the mold is closed and movable relative to the pad 6 (FIG. 4). FIG. 2 FIG. 3 S th 6 0 11 s "