SU534300A1 - Die casting mold - Google Patents

Description

(54) PRESS FORM FOR MOLDING UNDER PRESSURE

one

The invention relates to foundry, in particular, to injection molding of metals and alloys.

At present, the most difficult to mechanize operation in the process cycle for casting by injection molding is the removal of sprues and washers. In the case of mass production of castings, their removal is carried out manually on chipping chips, and in medium and small-scale production.

The most progressive direction should be considered to be the separation of gates and washes in the mold itself for casting under pressure during the process cycle for pressing and removing castings on an injection molding machine.

A known die casting mold, in which the sprue system is separated when the casting is ejected. l In order to prevent deformation of the casting, the mold is provided with a cut-off plate with knives installed in the movable half-form, and shaping inserts installed in the fixed half-form and fixing the castings. In the process of opening the mold, the liners are moved together with the movable half-form by the levers installed in the punch plate.

The disadvantages of the known construction are large dimensions due to the need to increase the total stroke of the pusher plate and the edged plate by an amount that provides free access to the forming cavities for applying lubricant and inspecting their surfaces during operation, as well as the presence of hinged arms and a large number of surfaces matching on the landing landing.

In order to eliminate the above drawbacks, the proposed mold is provided with slides installed in the punch plate and fixing the casting in it, and inclined columns installed in the cut plate and leaving with a gap in the holes made in the slider.

Claims (1)

The drawing shows a mold in section. The mold consists of a fixed and movable half-form. The movable half-form contains a support plate 1, on which the supports 2 and 3 are rigidly fixed, the backing plate 4, the plate 5 of the punch. Between the base plate 1 and the backing plate 4 there is an enclosed plate 6 with knives 7, fixed by plate 8, and an ejection plate 9 with ejectors 1 fixed by plate 11, In the edging plate 6 there are inclined columns 12. In the plate 5 of the punch there are slides 13 and they are made mold-forming surfaces forming the casting 14. In slider 13, a hole is made a for an inclined column 12, which enters the hole with a gap. The fixed mold consists of a fixed plate 15, in which the shaping surfaces are made, which form the casting 14, sprues 16, washers 17, and the base plate 18. Gates 19 and wedge clamps 20 are fixed in the plates 15 and 18. the mold is moved to the left. When the plate 8 comes into contact with the stops mounted on the injection molding machine, movement begins around the carved plate 6 with knives 7 and inclined columns 12 fixed to it. The link 14 is rigidly fixed with the slider 13, but 7, sprues 16 are cut off, washers 17 and pushed them out. At this time, the inclined columns 12, moving together with the trimmed plate, select the gap formed by the working surface of the slider 13, which is inclined towards the tip 12 of the slider 13. With the further movement of the trimming plate 6, the slanting columns 12 move the slider 13, thereby casting 14 with the sliders 13. At that moment when the plate 6 is in contact with the plate 11, the movement of the plate 9 begins, and the ejector 10 pushes the casting 14 out of the punch plate 5. When the mold is closed, the pligt 6 with the knives 7 and the ejection plate 9 with the ejector 10 are returned to their original position by means of counter pushers (not shown in the drawing). The inclined column 12, interacting with the slider 13, returns it to its original position. Hard fixing of the slider 13 is carried out by wedge clamps 2O, Claims An injection mold, comprising a movable half-form, in which a punch plate, an ejector plate and a blade with knives, and a fixed half-form, are installed; simplifying the mold design, it is provided with crawlers mounted in a paunson slab and fixing the casting therein, and inclined columns mounted in a cut-off plate and entering with a hole in the crawler holes. Sources of information taken into account in the examination: 1. Copyright certificate № 3527О7, l. B 22 D 17/22, 1970