SU1757899A1 - Casting mold - Google Patents

Abstract

The invention relates to the processing of plastics and can be used in casting forms under the pressure of non-ferrous materials and alloys. The purpose of the invention is to increase the reliability of the form in the operation of the automatic mode. For this, the end of the second lever is pivotally connected to the movable forming plate, and the copier is fixed to the fixed forming plate. 4 il.

Description

The invention relates to foundry, in particular, to the processing of plastics in products

Known to the mold according to the author's certificate of the USSR No. 846087, cl. B 22 D 17/22, 1979, containing fixed and movable half-molds. The fixed half-form includes a die and a sprue bushing. The movable half-form includes a punch plate installed with the possibility of axial movement, an insert with a slot fixed in it, in which a sign fixed in the intermediate plate is placed, to the ejector pusher with the ejector and the knife installed in it. On the fastening plate of the movable half-form, a crank mechanism consists of a crank and a crank mechanism consisting of a crank and a connecting rod placed in the place of their articulation of a roller, a slider rigidly connected to the punch plate.

In the plate ejector made a groove that interacts with the roller

at

about

In the initial position, the ejector plate is in the leftmost position, with the roller engaging the groove. To remove the liner: the first feeder from the insert is an ejector attached to the plate of the ejector.

The disadvantage of the design lies in the fact that there is no separate removal of the product and the sprue, reliable removal of the product from the pushers, which increases the labor intensity of the service of the mold. The disadvantage of the described form is also the complexity of its design and maintenance, since the crank mechanism is located inside the form.

Known Casting form on the author's certificate of the USSR No. 579157, cl. In 29 C 45/26, 1976, selected as a prototype.

The casting head contains a matrix plate, a base rigidly connected to the matrix plate, a preliminary and final ejection plate with ejectors and a rotary two-lever system interacting with the ejector plates. A stop is fixed at the base creating a gap between the ejection plates; There is a copier on the bottom of the matrix plate and the base.

The disadvantage of the described construction is the cumbersome of the ejection system of castings, the complexity of the service, because this system is located inside the mold,

In addition, the design of the form does not provide for separate and consecutive removal of the product i gz, which reduces the reliability of the form in the conditions of automatic mode.

The purpose of the invention is to increase the reliability of the form in operation in automatic mode due to the advance movement of the movable forming plate separating the product from the pushers and dropping the sprue.

Figure 1 shows the inventive form in the closed state, a general view; in figure 2

-form at the time of discharge of the gate; on fig.Z

- the movable part of the form at the time of discharge of the product; FIG. 4 is a variant of the form with a two-sided copier: action.

Casting form contains a movable and fixed part.

The movable part includes a movable shaping plate 1 mounted on guide columns 2 with the possibility of moving along them, an ejection plate 3c by pushing ejectors 4 and a divider 5, a lining plate 6 rigidly connected to the base 7, with which the fixing is made to a thermoplastic, drive an ejection plate consisting of a pair of levers 8 pivotally fixed with one shoulder on the plate 3 and 1 with screws 9, and with the other arm the levers 8 are interconnected by an axis 10 on which roller 11 is mounted.

To limit the motion of the movable plate of the dies 1, the stop 12 serves.

The fixed part of the form contains a fastening plate 13 with a shaping plate 14 on which the copier 15 is rigidly fixed with one of its ends.

The copier 15 is made in the form of strips with a protrusion on the console end.

Casting form works as follows.

After the injection of the polymer material and the technological hold, the mold is opened (Fig. 2). The divider V., thanks to the presence of the snuffs, carries along

sprue which is separated from the items. The roller 11 moves freely along the horizontal surface of the copier 15.

Pass the distance required for

removing the sprue from the mold, the roller 11 rests on the protrusion of the copier 15, and continuing upward movement increases the distance between the attachment points 9 of the arms 8. The movable forming plate 1

moves to the right along the columns 2, separates the adhered products from the pushers 4 and the gate runs into the receiver (container) for the sprues.

Upon further movement of the movable part of the mold, the ejector plate 3 abuts against the stem 16 of the thermal expansion valve (Fig. 3) and stops.

Now the movable forming plate 1 due to the extreme position

the anvil 12 moves with the movable part of the mold, choosing a gap formed between the products and the pushrods 4. Upon contact with the products, the pushers 4 remove them from the movable forming plate.

1 in its receiver (container). At this point, the anvil 12 keeps the movable plate from moving through the columns 2.

After the products are removed, the mold begins to close. At the same time, the roller 11 mechanism

removing the products, interacting with the protrusion of the copier 15, moves the plate of the pushers 3 with the pushers 4 relative to the plate 1. In case of the presence of 4 products randomly stuck on the pushers 4, their final removal occurs,

To move the movable forming plate 1 in a multi-bed large-sized form, i.e. in a form where considerable effort is required to separate products from pushers, a variant of the two-way product removal mechanism can be applied (Fig. 4),

Claims (1)

Formula of the Injection Molding form containing a fixed and movable forming plates, an ejection plate with ejectors and its drive consisting of a copier and a two-lever system interacting with it, the levers of which are interconnected, and the end of one of them is hinged attached to the ejection plate that distinguishes so that, in order to increase the reliability of the form in operation in automatic mode, the end of the second lever is pivotally connected with the movable forming plate, and the copier is attached to the movable forming plate. v  l SHSh zhsh "L -four sl -j oo you