SU1382584A1 - Injection mould for pressure casting - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to casting- Hohfy production, in particular to injection molding. The aim of the invention is to improve the reliability of removing the press residue with sprues from the mold. The mold contains a stationary half-form 1 with a movable plate of the matrix 2 and pushers 3, having undercuts 4 and installed with the possibility of axial movement in the plate of the fastening 5, and a movable half-form 6 with a plate of the punch 7 and the mechanism I of driving the matrix plate consisting of a spring-loaded lever 9, interacting with the camcorder 14. When opening the mold, the pushers 3 are moved to stroke L and the press residue 16 and sprues 17 are separated from the casting 13, and when opened to move L, the press residue falls with the sprues down. Further opening of the mold and ejection of the casting is carried out in the traditional way. The goal is achieved by installing the pushers 3 in the plate 5 movably in the axial direction and due to the fact that the length of each higher pusher is longer than the lower one, which does not allow the remains of the gating system to hang on the pushers. 2 Il. i {L

Description

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The invention relates to foundry, in particular to injection molding.

The aim of the invention is to improve the reliability of removing the press residue with sprues from the mold.

FIG. Figure 1 shows the mold after pressing in the metal, in Figure 2, the same in the opened state.

The injection mold contains a stationary half-form 1 with a movable die plate 2 and pushers 3 having undercuts 4 and mounted with the possibility of axial movement in the mount plate 5, and a movable mold half 6 with a punch plate 7 and a matrix plate drive mechanism 8 .

The mechanism 8 consists of a spring-loaded lever 9 with a protrusion 1C and a spring 11. In the movable half-form, pushers 12 are installed to push out the casting 13. A copier 14 is fixed to the stationary half-form 1, which interacts with its protrusion 9. The pushers 3 are fixed by pins 15 turning.

The mold works as follows.

In the closed state, the lever 9 with its protrusion 10 presses the plate 2 to the plate 7. After the metal is poured and crystallized, the mold opens, and the matrix plate 2 moves together with the movable half-form 6, and the pushers 3 move to the stroke L 2. together with press residue 16 and sprues 17, since the undercuts of 4 pushers 3 are filled with metal. When this occurs, the separation of the gates 17 from the casting 13. When moving

Research Institute of the plate 2 of the matrix on the course L, the spring-loaded lever 9, interact with its protrusion with the protrusion of the copier 14, comes out of engagement with the plate 2 and

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the mold begins to open along the second plane of the connector between plates 2 and 7. Press residue 16 with sprues 17 falls down freely, since the length of each higher pusher 3 is greater than the length of the lower one. The extrusion of the casting from the movable mold is carried out in the traditional way.

When the mold closes, the pushers 3 return to their original position due to the interaction of the pins 15 with their ends with the protrusions of the pushers 3 on the one hand and the die plate 2 on the other hand.

Making the pushers movable allows removing the press residue with the sprues from the mold without deforming them, and performing the length of each pusher that is higher than the lower one — eliminating the hang of the press residue with the gates on the push, body, which leads to increased reliability operation of the mold and the reliability of the removal of the press residue with the sprues from the press-foop in I.

Claims (1)

Invention Formula A mold for injection molding with predominantly two connector planes, comprising a fixed half-form with a movable die plate and pushers having undercuts and mounted in a mounting plate, and a movable half-shape with a drive mechanism of the movable die plate, characterized in that in order to increase the reliability of removing the press residue with the sprues from the mold, the pushers are installed with the possibility of axial movement, and the length of each higher pusher is longer than the lower one. tl s  0 l V