SU1028515A1 - Mould of automatic thermoplastic moulding machine for making plastic articles - Google Patents

Abstract

Mold termoplastavtomat for the manufacture of plastics comprising a movable and a stationary mold half with Layout yuschimi cavities, the lever parallelogram mechanism levers which are pivotally coupled to the mold halves and connected the upper and lower cross members, guide schtangu, a rotatable plate having punches-armaturoderzhatel E and its rotation mechanism, characterized in that, in order to reduce the labor intensity of manufacturing the product due to the mechanization of their removal, it is equipped with an injection molding machine connected to the columns the possibility of longitudinal movement along them of the base plate with fixed stops located between the base plate and the upper traverse intermediate plate, spring-loaded relative to the upper traverse and connected with it, fixed in the upper traverse by a gripper interacting with one of the stops of the support plate and mounted on rotary plate spring-loaded puller with pushers that interact with the end of the guide rod, which is spring-loaded relative to the base plate, equipped with a limiter ho a, made in the form of a spring-loaded latch located in the upper cross bar, contact (L with a base plate supporting another stop), and mounted inside a screw that is movably fixed in the upper cross bar that interacts with a nut rigidly fixed in the intermediate plate, the screw flange being in the form of a gear, gear / gear assembly with swivel plate. u 00 ate

Description

The invention relates to equipment for processing plastics and can be used for the manufacture of products with fittings for various purposes, in particular in electrical household appliances in the manufacture of products reinforced with tubes, pins, etc.

A known casting mold for the manufacture of long hollow products with a partition comprising a movable and stationary half-form, a lever device with a pushing bar associated with the half-shapes located opposite to the lever arm, a sign for making a hole and connected with the push-bar of the yoke 1.

In the well-known form, the manufacture of articles with reinforcement requires additional labor costs due to the fact that the injection molding machine does not work during the loading of the injection mold form with the reinforcement. In addition, for the final removal of products from the form also requires the work of the operator. /

Closest to the invention is a casting mold for the manufacture of plastic products, comprising movable and fixed half-molds with decorating cavities, a lever parallelogram mechanism, the levers of which are connected to the half-molds and connected by the upper and lower cross-arms, a guide bar, a turntable with punches armature holders and swivel plate mechanism 2.

In a known form, the removal of castings is carried out outside the injection mold on a special tool, which increases the labor intensity of making castings.

The purpose of the invention is to reduce the labor intensity of manufacturing the product due to the mechanization of their removal when opening the form.

The goal is achieved by the fact that the injection mold contains a movable and stationary half-molds with shaping cavities, a lever parallelogram mechanism, the levers of which are pivotally connected to the half-molds and connected by upper and lower cross-arms, a guide bar, a rotary plate with punches-fixtures and its rotation mechanism, is provided with an injection molding machine connected to the columns with the possibility of longitudinal movement along them of a support plate with stops fixed in it: located between the support plate and The upper traverse intermediate plate, which is spring-loaded relative to the upper traverse and connected to it, is fixed in the upper traverse by a gripper interacting with one of the stops of the base plate and mounted on the rotary plate by spring-loaded removable knobs with the pushers interacting with the end of the guide bar, which is spring-loaded relative to the base plate, provided with a travel stop, made in the form of a spring-loaded latch located in the upper traverse, in contact with another stop of the support plate, and installed inside the movable fixed in the upper cross bar of the screw that interacts with the nut, rigidly fixed intermediate plate, and the flange of the screw is made in the form of a gear connected by means of a gear with a rotary plate.

0 Such an embodiment of the mold provides a reciprocating movement of the guide bar, which removes the castings with a puller when opening the mold prior to the beginning of the rotation of the rotary mold, as a result of which there is no need to use special tools to remove the finished castings from the mold.

FIG. 1 shows a schematic representation of the proposed casting form, a longitudinal section; nl fig. 2 - structural-kinematic scheme of the injection mold; in fig. 3 - casting form in the closed position; in fig. 4 - casting form in the open position; in fig. 5 — joint unit of the upper crosshead with the intermediate and support plates; in fig. 6 - latch assembly on the right side bar.

The casting form contains a fixed half-form 1 with a matrix 2 fixed on it and a mobile half-form 3 with a matrix 4, a lever parallelogram mechanism 5, the levers of which are hinged

0 are associated with half-molds and are connected by the upper 6 and lower 7 traverses. The upper traverse 6 is made in the form of a system of plates rigidly interconnected.

Between the fixed 1 and the movable 3 half-forms is rotatable

5 a plate 8 with punches-reinforcement holders 9, a spring-loaded puller 10 with a pusher 11 interacting with the end surface of the guide rod 12, by means of a spring 13 pressed from the base plate 14 connected by racks

 15 with columns 16 of the bed of an automatic molding machine with the possibility of longitudinal movement (sliding) along the columns. The guide bar 12 is provided with its stroke limiter in the form of a spring-loaded click 17, in contact with the stop 18 with a bevel a fixed in the base plate 14.

The rod 12 is located inside the screw 19 movably by means of rolling supports 20 fixed in the upper traverse 6, interacting with a nut 21 fixedly mounted in an intermediate plate 22 located between the upper traverse 6 and the support plate 14.

The flange of the screw 19 is made in the form of a gear 23, which by means of gears 24-5 27, the shaft 28 is connected with a rotatable plate 8.

An overtaking clutch (not shown) is integrated in gear 25 to ensure that plate 8 is rotated in only one direction.

Intermediate plate 22 elastically middle-. The spring 29 is pressed from the upper crosshead, sy 6 and connected with it by a gripper 30 hinged on the traverse 6 and an interacting protrusion 31 with a bevel of the stop 32 fixed in the base plate 14.

The form works as follows.

In a closed form, the molten thermoplastic material enters the forming cavities of fixed 1 and movable 3 half-forms through the sprue bushing.

At the same time, in an empty position, which is outside the working area, the operator installs reinforcement 9 on the reinforcement holders.

After the required holding of the material under pressure and after cooling, the mold is opened.

The semi-mold 3 with the matrix 4 moves away from the fixed half-form 1 with the matrix 2.,

When moving the levers of the parallelogram lever mechanism 5, the swivel plate 8 together with the guide shtanga 12, the upper 6 and lower 7 traverses, the plates 14 and 22 occupy an intermediate position between the half-molds 1 and 3. At the same time, the support plate 14 slides along the columns 16 of the molding machine, remaining unchanged the distance from the axis of the columns, and the traverse b and plate 22 together with the rod 12 perform a vertical movement downwards. This movement consists of three stages.

In the first stage, the rod 12, overcoming the resistance of the spring 13, moves towards the pushers 11 of the puller 10., together with the upper crosshead b and the plate 22, which are interconnected by the grip 30. When

This screw 19 and, respectively, pinion 24-27 fixed.

In the extreme lower position of the shtanga 12, I will exert an end surface on

the pusher And, and, accordingly, the puller 10, drops the casting from the punches-holders 9.

At the second stage, at the same time ho ejection of the casting, the latch 17, interacting with the bevel and stop 18, releases the bar

12, which, under the action of the spring 13, moves upward, freeing the pivot zone.

In the third stage, the protrusion 31 of the gripper 20 comes into contact with the bevel of the anvil 32, as a result of which the gripper 30 rotates around the hinge support, separates the yoke b and the plate 22. Under the action of the spring 29, the plate 22 together with the nut 21 moves towards the base plate 14. As a result -. Those interactions of the nut 21 and screw 19 rotate the latter together with a 24-27 shaft 28. The plate 8 rotates around an axis by 180 °, the armature holder 9 and the armature holder 9 are withdrawn into the zone outside the mold, and other luansons are introduced into the molding zone fittings 9 with pre-installed reinforcement.

When the mold is closed by the action of the lever parallelogram mechanism 5, the upper traverse b and the plate 22 move upwards towards the support plate 14, reach the stop in the support plate 14, the intermediate plate 22 stops, the gripper 30 connects the plate 22 and the traverse 6, and the latch 17 fixes the guide bar 12. Cycle is completed.

The use of the proposed form will reduce the complexity of manufacturing

5 products with long fittings.

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FIG. 1 FIG. 2 f / / Z9J / t; 6

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Claims (1)

Injection molding machine for the manufacture of plastic products, containing a movable and fixed half-mold with forming cavities, a lever parallelogram mechanism, the levers of which are pivotally connected to the half-molds and connected by the lower and upper traverses, the guide rod, the pivot arm and the pivot arm with the pivot arm Moreover, in order to reduce the complexity of manufacturing the product due to the mechanization of their removal, it is equipped with a molding machine connected to the columns with a longitudinal movement along them with a support plate with stops fixed in it, located between the base plate and the upper crosshead, an intermediate plate spring-loaded relative to the upper crosshead and connected with it, a grip fixed in the upper crosshead interacting with one of the 'supports of the base plate and mounted on a rotary plate with spring-loaded pullers with pushers interacting with the end face of the guide rod, which is spring-loaded relative to the base plate, equipped with a travel stop, made in the form of a spring-loaded latch located in the upper g-track, which contacts-> contacting the other support of the base plate, and | / Λ is installed inside a screw movably fixed in the upper beam, interacting with a nut, rigidly fixed I in the intermediate plate, and the screw flange 2 that is made in the form of a gear connected by a gear with a rotary plate.