SU494269A1 - Casting form - Google Patents

Description

those 14. On the plate 14 set delay 26 and spring 27.

The form works as follows.

In the closed state, the half-molds of the matrix form a working cavity, inside of which is located the forming sign 10, as shown in FIG. 1. The melt of the thermoplastic, the passage through the sprue bushing 9, enters the working cavity and, after cooling, forms a product, for example a handle, with a central hole along the longitudinal axis.

When the half-molds are disconnected, the product remains on the signs 10, and half of its surface is in contact with the matrix 5 of the mobile half-form 3, as shown in FIG. 3. In this case, the movement of the mold 3 to the left is stopped, as the thrust washers 8 on the columns 7 do not allow such a movement, and the delay 26 removes the sprue from the sprue sleeve 9. In this position, the end face of the stop 23 of the bar 22 interacts with the closing surface of the mold half 3.

Upon further movement of the movable lithium 14, the sprue is released from the delay and feeds into the hopper of the injection molding machine, and the screw 17 t does not have the lever 13, which, in turn, unfolds the registration mark 10 around the longitudinal axis of the puller 12, resulting in the puller 12 and the shaping the mark occupies a position, as shown in FIG. 4. At the same time, the registration mark is moved relative to the molded product, which with its end rests on the puller.

Further movement of the plate 14 associated with the movable plate of the injection molding machine results in the registration mark completely coming out of the opening of the molded product, as a result of which the product falls under its own weight into the receiving hopper of the injection molding machine. At this point, the casting machine unors move the plate 14

stops, and the ends of the decoding marks 10 remain inside the puller 12.

When the closure of the form screws 17 after a free move in the grooves of the 16 levers 13 push the latter forward. Under the action of the spring 27, the system of the lever 13 - forming sign 10 is broken. Simultaneously, the signs 10 are moved into the puller 12 and the signs are rotated to the initial position.

When the end of the pusher 15 interacts with the tooth 21, a quick turn of the characters 10 to the initial state occurs. Simultaneously with the rotation of the characters, the template 25 interacts with the pin 24 and raises the bar 22, with the result that the stop 23 goes out of engagement with the plane of the half-form connector 3.

Upon further movement of the plate 14 to the right, the closures of the mold halves occur, and the process of molding the articles by injection molding is repeated.

Subject invention

Casting molds for the manufacture of products from polymeric materials, containing movable and fixed plates with semi-molds with dies fixed on them, guide columns, sprue bushing, decoration marks, the shanks of which are taken out of the matrixes, a puller mounted on the decoration marks, and an ejector, made in the form of a system of levers, one end of which is associated with design marks, characterized in that, in order to accelerate the return of signs to the initial position when closing half-molds, the casting molds and provided scharnirno associated with the ejector levers movable plate system secured thereon pusher and puller pivotally fastened to the movable mold half and is configured with a protrusion cooperating with a pusher when closing the mold halves.

2k

25

/ 5; i / 7 27/3 J g / g. /

Fig.Z