SU583870A1 - Die for pressure-casting - Google Patents

Description

(54) PRESS FORM FOR MOLDING UNDER PRESSURE

one

The invention relates to foundry.

A known press mold for pressure nodes comprising movable and stationary half-molds, a mechanism for separating sprues made in the form of rotary knives mounted on a stationary zero shape, with sockets for knives in the fixed zero shape. The swivel knives, either by hand or by means of the drive, are set to the lowest position in which the gate 1 is cut.

The disadvantage of this form is the presence of a mechanism with a feed drive} ia sprue separation. Mechanism with rotary knives requires a double stroke nodvizhny noluforma with each pressing, which reduces performance and limits the nesting shape.

Closest to the invention but the technical essence and the achieved result is a mold for casting under pressure, containing a fixed half-form and iodvigilance, in which a plyon bite is installed, a knife board and an ejector plate are mounted. In the punch slab there are slides that fix the casting, and in a trimmed slab - inclined columns, entering with holes in the holes, made in slides 2.

When opening the iress-form, the slab, facing the stops, does not move forward and cuts off the sprues from the casting, which at that time is fixed to the nodzushkamn. Then

the slanted columns are retracted, and the casting is removed from the mold by pushers. The disadvantages of this mold are the low quality of spalls at the place of cutting the sprue due to its possible uneven breaking and the complexity of the construction due to the presence of separate plates attached to the ejectors and knives.

In order to improve the quality of the branches and the design of the structure, the proposed mold is equipped with an insert, which is not fixed in the slab of the gate system, and the knives are installed in the ejector pushers. In addition, a groove is made in the nodding chamber

the remainder, and the oblique column is installed in the extractors.

Pa figs. 1 shows the proposed mold, cut; in fig. 2 is an iress form at the time of removal of the sprue and gate.

The mold consists of non-iodine and noduvial noluform. The semi-mold has a fastening plate 1, nlite} 2 ejector pushers 3 and a counter-knob mn 4, resistant plntu 5, plntu 6 punch,

liner 7, liner 8. In nlit 6

The punch is fixedly inserted into the insert 9, which, together with the liner 7, forms the working cavity of the mold. The insert is made feeder 10 gating system. A slider 11 is also installed in the punch plate with a hole, into which the inclined column 12 enters with a gap, and 2 ejectors fixed in the plate.

The knives 13 are also fixed in the plate 2 of the pushers, which cut the sprues. The fixed proforma contains a fastening plate 14, a matrix plate 15 with an insert 16 and a sprue bush 17.

The mold works as follows.

After pressing in the metal and putting it out, the mold is opened. The casting and the sprue are moved along with the moving half-form. The stop plate 5 finds on the fixed support of the machine, and the pushers push the finished casting out of the mold. At the same time, the sprue 13 cuts the gate 18 from the casting with the cutting edge, as it is fixed by the insert 9.

Pakloin column 12 after sampling the gap in the hole of the slide 11 moves it in the viz. Due to recess 19 in slide 11, the sprue emerges from insert 9. When the slider is moved along the inclined part of column 12, the sprue separates from the slider.

The present invention can reduce the cost of castings by 30%. The capacity of the nrss-form is increased by 2-3 times.

Claims (2)

1.Press-mold for injection molding, containing an immobile noloform and a movable one, in which a plate of a punch, an ejector of pushers, knives for trimming sprues and a nipple placed in a plate of a punch and interacting with a sloping column, characterized in that with a pelle to improve the quality of castings and simplify the construction of the nrsss-form, it is equipped with an insert, which is not securely fixed in the punch plate and a runner system made with the feeder, and is installed in the pushers plate. 2. A press mold according to claim 1, characterized in that, in order to follow the removal of the sprue from the insert and the slider, a slit is made in the slider and the column is installed in the ejector plate. Sources of information that are implicit in the examination 1. Authors certificate of the USSR Up to 452424 cells, B 22 D 17/22, 1973. 2. Authors certificate of the USSR. Y 534300 cl. In 22D 17/22, 1975. / A / 4, ten i8 17 ir .., p%. ,, ./Ш  M  ./