SU526437A1 - Mold for the manufacture of produced models - Google Patents

Description

The invention relates to foundry production and is intended for the manufacture of models in the production of casting but produced models.

A known die-casting mold with a two-stage ejector, which achieves the insertion of m into the design of a column with shaped slots, periodically connected by means of a pin with two sleeves that roll in the slabs. Aehanism of ejection is characterized by complexity even in the manufacture of a single part in a mold, and in the case of the manufacture of a multi-cavity mold, it is necessary to introduce another number of parts. 1J

The closest solution is a mold with a two-stage ejection of castings, including a drive-driven and non-movable zero-molds and an ejection mechanism, made in the form of two groups of tappets connected through the plates to the drive of the machine, one of the plates of the sliders connected to the drive by means of pins , the stroke of them, through the cylinder plate with a gap, along the length of the limit is usush, and the difference in the stroke of the actuators 2. Such a structure of the extruded mechanism provides for the initial period the movement of one group of the lifters, and after selecting the gap - the joint work of both groups of pushers.

However, such a design form does not ensure the safety of the produced models when they are removed from the mold.

In order to prevent breakdowns of razovysotnyh models when extracting from the pressjopMbi, one of the plates is connected to the supporting pltoptop via elastic elements and is enclosed by a travel stop, and the other is connected to the movement of the wire.

The creation of an independent stroke of each plp pusher provides a reverse two-step ejection cycle: both groups of gels move in an initial direction, and then the TO.ibKo movement moves one group.

Ia the drawing shows the proposed mold in the section.

The iipece form consists of a fixed and movable half-form. The fixed half-mold contains a fixed matrix 1 attached to the backing plate 2, and with the uprights 3 is connected to the support plate 11 4. The iodvil on the half-mold contains a base 5 and a flange 6 with a hole for pressing in the model composition. Nonodvil on zero form contains point guides pins.

The BbiTaviKHBaHHH models are made in the form of two plates 8 and 9. The plate is 8 euros with a pusher 10 of the machine and has a group of pushers 11 and a central pusher 12 which perform the greatest speed. In addition, counter pushers 13 are attached to this plate. Plate 9 contains a group of pushers 14 intended for making the smallest stroke and having shoulders a that are limiting the working stroke of the pushers.

Between the plate 9 and the base plate 4 there are rubber elastic elements 15 pre-compressed through washers 16 with screws 17, and in the plates there are holes b for inserting protruding screws into them when moving the plates to the stops 18 located on the base plate 4.

The mold works as follows. The mold is closed by moving the matrix 5 under the action of the drive for the machine. At the same time, through the counter-pushers i6, the plate moves and, consequently, the plate U, which compresses the elastic elements ib by an amount в, which is approximately equal to the model height G. In the process of compressing the elastic elements of the screw head G / enter into the holes of the 6 plates.

In the closed state, the model composition is pressed into the mold through the opening of the flange b and, after an appropriate cycle required to harden the model 19, the mold is opened. When this movable matrix 5 moves to the right. In case of sufficient strength of the compressed elastic elements 1o to push the model IV of the plates 8 and 9, they will begin to synchronously move to the right until approaching the plate 8 of the pusher 10 of the machine. And a distance equal to the value in will pass, the plate 9 with the pushers 14 will stop, and the pusher 10 will continue moving the plate 8 with the ejectors 11 until the model is completely removed from the mold. If the effort of compressed rubber rings is not enough

to push out the model 19, the plates 8 and 9 will synchronously move from the moment of interaction of the pusher 10 with the plate 8. The plate 9 will move under the action of the elastic properties of the compressed rubber elements 15. only the pushers 14 will be pressed with their shoulders and into the base plate 2, they will stop and the plate 8 with ejectors 11 and 12 will continue to move by the amount necessary to completely remove model 19 from the die. The central ejector 12 has an effect on the sprue bushing of the models when moving the plate 8. The work cycle provided by the mold

pushers eliminates iolomka models when removed from the mold.

Claims (2)

1. A mold for the manufacture of molded models, comprising movable and stationary half-molds, a support plate and a two-step ejection mechanism for castings, consisting of two groups of pushers mounted on plates, characterized in that, in order to prevent breakages of different-height models when removed from mold by creating independent the course of each group of pushers, one of the plates through elastic elements is connected with the supporting stove and equipped with a stroke limiter, and a friend is associated with a displacement drive. 2. A mold according to claim. 1, characterized by the fact that the elastic elements are made in the form of rubber rings. Sources of information taken into account in the examination: 1. US patent L 3572424, cl. 164-344, 1971. 2. Japanese Patent No. 12124, cl. 11B 01, 1969. / I / I gS "