SU1706882A1 - Casting mould for manufacture of polymeric products - Google Patents

Abstract

The invention relates to the processing of polymeric materials by injection molding, in particular to molds for the production of elongated glass-like parts operating in automatic mode. The purpose of the invention is the expansion of technological capabilities. For this, the casting mold is provided with an intermediate plate with counter-pushers installed on it to interact with the die plate and wedges installed in the base plate, and the ejectors are axially displaced relative to the ejection plates. Moreover, at the base of the ejector, there is a cavity in which a compression spring is installed, and the landing part of the ejector is made with stepped stops to interact with the intermediate plate and with spring-loaded sliders that are installed in the ejection plates with the possibility of interaction with wedges. 4 il. 4V Ј

Description

The invention relates to the processing of polymeric materials by injection molding, in particular to molds for the production of elongated glass-like parts operating in automatic mode.

The purpose of the invention is to expand the technological capabilities of the form.

FIG. 1 shows the casting mold in the closed state: FIG. 2 - the same, in the open position; in fig. 3 - the same at the time of separation of the product from the punch; in fig. 4 - the same at the time of dropping the product from the punch.

Casting form contains fixed and movable half-form.

The fixed half-form contains a gating plate 1 with diluting gating channels and a plate 2 of the matrix.

The movable half-form comprises a plate of 3 punches with punches 4 mounted on a support plate 5 in which a wedge 6 is fixed, an intermediate plate 7 with counter-tappets 8 mounted on it, interacting with the die plate 2 via a spring-loaded clamp 9. ejection plates 10 and 11 from the ejector 12 and shank 13 and fastening plate 14. The pushers 12 are installed in the plates 10 and 11 with the possibility of axial movement relative to the latter. At the base of the ejector 12 there is a cavity in which a compression spring 15 is installed. Landing X |

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A part of the ejector 12 is made with stepped stops 16 and 17. In the plate 10 of the ejector there are placed sliders 18 interacting with wedges bis.

16 ejector 12 and spring loaded in the direction perpendicular to the movement of the ejector 12. Through the stop

17, an ejector 12 interacts with an intermediate plate 7.

In the fixed plate 1 mounted columns 19. interacting with the matrix. In the plate of punches 3 installed columns 20, interacting through spring-loaded latches with a plate 2 of the matrix. The latch columns 20 provide movement of the die together with the movable part of the mold to provide a shape plug on the plane 1-1 where the sprues are taken off and dumped. The thrust columns 19 hold the matrix in the fixed part of the half-form with the further disclosure of the shape along the main plane of the connector II-II.

Casting form works as follows.

After the injection of the polymer melt and technological exposure, the mold is disconnected. First there is a connector on the plane I-I. The matrix plate 2, connected by columns 20c with the movable half-form, moves away from the fixed gating plate 1 to a distance that ensures the separation and discharge of the sprues.

Upon further disclosure of the form, the thrust columns 19 hold the plate 2 of the matrix in a fixed half-form, and the opening takes place along the plane II-I. In so doing, the product leaves the cavity of the die plate 2 and remains on the punch 4.

The punch plate 3 and the support plate 5 approach an intermediate plate 7, which

is in place due to the interaction of the counter-pushers 8 installed on it with the matrix 2 through the spring-loaded latch 9.

Upon further movement of the movable semi-dog, the shank 13 rests on the fixed support of the injection molding machine, the ejection plates stop, and the plate 3 punches with punches 4 with base plate 5 and intermediate plate 7 continue to move. In so doing, the product is disconnected from the punch 4 and remains on the ejector 12.

With further movement of the movable part of the wedge 6 interact with their

bevels with reciprocal shackles on the slide 18 and remove them from engagement with the stepped stop 16 of the pusher 12. The released ejector 12 under the action of

the compression spring 15 travels the distance to the intermediate plate 7 and is hit against it by the abutment 17. transferring a shock pulse to the product, which as a result is dropped from the ejector 12.

When the form of the counter-pusher 8 is closed, interacting with the plate 2 of the matrix through the spring-loaded latch 9, return the intermediate plate 7, and with it the ejector 12 to its original position.

The wedge 6 is disengaged with the sliders 18, which, by the action of the springs, engage with the stops 16 of the ejectors 12. Further, the cycle repeats.

The proposed technical solution allows reliable discharge of dimensional details such as an elongated cup from the ejectors. An increase in the force of the shock pulse is achieved by using spring-loaded ejectors with a predetermined sequence of operation, which makes it possible to transmit a shock pulse directly to the product.

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Claims (1)

Invention Formula A mold for the manufacture of polymer products containing a fixed gating plate, a matrix plate. a plate of punches with punches mounted on a base plate, an ejection plate with ejectors and a shank, a mounting plate and a mechanism for dropping products stuck on the ejector, having a spring-loaded drummer and spring-loaded sliders, characterized in that. what. in order to expand the technological capabilities of the mold, it is provided with an intermediate plate with counter-mounted baffles to interact with the die plate and the wedges installed in the base plate, and the ejectors are axially displaced relative to the ejection plates, with a cavity in which the compression spring is installed at the base of the ejectors, and the landing part of the ejectors is made with stepped stops to interact with the intermediate plate and spring sliders which installed in ejection plates with the ability to interact with wedges. CM CO with uo o at 3 about