SU889446A1 - Casting mould for producing plastics articles - Google Patents

Description

one

This invention relates to Forming in molds, in particular to castings.

Closest to the invention, a casting mold for the manufacture of plastic products, containing a movable and stationary half-mold with the shaping cavities, and a lever parallelogram mechanism, the levers of which are connected by two slats and with hinges with half-molds and a guide rod. ti However, this form does not provide for the manufacture of products with long fittings and has a low production. water content in the manufacture of long products.

The purpose of the invention is to increase the productivity of manufacturing products with long reinforcement.

The goal is achieved by the fact that the injection mold, containing a movable and fixed mold with a cavity, and a lever parallelogram mechanism, the arms of which are connected by two slats and hinges with half molds and a guide rod, is supplied. on the frame fixed on the shaft with the cassettes mounted in it with the possibility of movement. thirty

for reinforcement and rotation mechanism, rod.

Such a form provides an increase in productivity due to the fact that, after the guide rod is rotated by 180, the cassettes are alternately positioned between the casing. The free cassette after closing the form has the ability to move in the grooves of the frame and extend beyond the limits of the working zone of the form. Thus, during mold casting, it becomes possible to perform all auxiliary work related to the installation of fittings and the removal of finished products.

FIG. 1 shows a casting mold in the open position; FIG. 2 - the same, in the closed position, in FIG. 3 is a view A of FIG. 1, in FIG. 4 shows a section B-B in FIG. 2

The casting mold contains an unmovable half mold 1 with a matrix 2 fixed on it and a mobile half mold 3 with a matrix 4, a lever parallelogram mechanism 5, the levers of which are connected to two plankagli 6 and 7 and hinges with plates 1 and 3 and with a guide rod 8. On the rod 8 fixed frame 9 formed by two planks.

In the guide grooves of the frame, two cassettes 10 and 11 are mounted to move tightly. On the bar 6 pivotally connected with the guide bar 8, a mechanism for rotating the bar is mounted, which includes the power cylinder 12, the rod 13 of which is in contact with gear 14, the surface of which is made in the form of a multi-nut nut which is engaged with the gear wheel 15. At the end of the stem there is a fork 16 preventing the rod from turning, and a spring 17 interacting with the microswitches 13 which are fixed Eny on rack 19 mounted on the case. Shaft 20 and columns 21 serve to guide the housing. In the upper part of the form, containers 22 are installed, which serve for laying the cord, and a device 23 for cooling the cassettes is placed on the rod 8.

8 cassettes there are springs 24 and 25

and pins 26 for fixing the cord with contact pins, and in frame 9 there are fasteners 27 of the cassette positions. The form works as follows. Cord 28 of the cord is installed in the container 22, then the end of the cord with 1 is fixed on it and the contact pins 29 is fastened with the spring 24, and the cord is installed between the pins 26 and secured with the spring 25 in the cassette 10, which is in the extreme position in the frame 9 and fixed lock 27, pr this form is closed ,. After loading, the cassette is pushed forward until it stops and the lock fixes this position of the cassette 10. After the mold has opened, the mounting plate 3 with the matrix 4 moves away from the Fixed half-form 1 with the matrix 2, and the frame with the cassettes 10 and 11 is intermediate between them put the The power cylinder 12 is turned on, while the rod 13 is moved, the end of which is made in the form of a multiple-feed screw in contact with gear 14. The forward movement of the rod 13 is transmitted to gear 14, which is rotated in ball bearings from the action of the multiple-feed screw and transmits movement through a gear wheel 15 to the shaft 20 which rotates the rod 8 with the cooling device 23 and the containers 22 - and the frame

9 with the cassettes 10 and 11 by 180 around the axis of the shaft 20, the Cassette 10 is placed between the mothers 2 and 4. During the opening and closing of the mold, the bar 6 slides along the shaft 20 and the column 21.

A fork 16 is mounted in the upper part of the rod, which keeps the rod 13 from turning during the operation of the power cylinder 12, as well as a spring 17 that contacts alternately with the lower or upper microswitches 18 mounted on the stand 19. Microswitches are commanded to operate the power cylinder.

After the mold is closed using the handles, the cassette 11 is pushed out until it stops, it is fixed by the latch 27, and the cassette is first unloaded and then loaded. At this time, in the second cassette 10, the installed cord is filled with plastic. The cycle then repeats, except that the ram moves the rod in the opposite direction.

Thus, the installation of the reinforcement and removal of the finished product is carried out during the pouring of the injection mold with polymer melt, since loading-unloading is performed in parallel with the operation of pouring the product, and the auxiliary time associated with the installation — removal of the reinforcement is combined with machine time and not affects the rate of time.

The use of the injection mold of this design allows to expand the range of molded products, as well as to increase productivity in the manufacture of products such as cords with a one-piece plug for 100%.

Claims (1)

Invention Formula A mold for the manufacture of plastic products, containing a movable and stationary half-form with decorating cavities, and a lever parallelogram mechanism, the levers of which are connected by two slats and hinges with half-shapes and with a guide rod, which is different in that in the manufacture of products with long reinforcement, it is provided with a frame fixed on the guide rod with installed in it with the ability to move the reinforcement cassettes and the mechanism of rotation of the rod. Sources of information taken into account in the examination 1, USSR Author's Certificate 157775, cl. B 29 F 1/02, 1962 (prototype), 12 2S 7ПЬ -f Fi.2