RU2299809C2 - Universal block mold - Google Patents

Abstract

FIELD: chemical industry; production of the universal block molds.

SUBSTANCE: the invention is pertaining to the quick-adjusting tacking for manufacture of the products from the thermoplastic plastics materials and may be used for manufacture of the details from the polymeric materials by the method of the injection molding with usage of the standard blocks for casting of the products of the various geometry in the multi-product and the small-scale production. The technical problem of the invention is the extension of the production capabilities and the increased labor productivity. The universal block mold for manufacture of the polymeric products, according to the invention, contains the motionless and sliding slabs, the base, the changeable packet, the ejection system and the centering components. One of the centering components is made in the form of the motionless pins installed at the lower part of the base. The centering components additionally include two vertically fixed on two sides of the base guides supplied with the longitudinal grooves and the fixing pins. At that on the guides at the stop block of the motionless pins there is the replaceable packet, which die has the corresponding bracket-shaped protrusions and is connected with the guides by the fixing pins.

EFFECT: the invention ensures the extension of the production capabilities and the increased labor productivity.

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Description

The invention relates to quick-fitting equipment for the manufacture of products from thermoplastic plastics and can be used for the manufacture of parts from polymeric materials by injection molding using standardized blocks for molding products of various geometries in multi-item and small-scale production.

A known block mold for the manufacture of polymer products (a.s. No. 1426817 SU) containing movable and fixed plates with clips in which the forming elements are installed, a support plate with stops, ejector plates and clamps of forming elements, each of which is made in the form ball mounted in the hole of the cage. A hole is made on the lateral surface of the forming element for interacting with the ball.

The known block form is a complex structure, and to replace the replacement bag, you must first unscrew the locknuts and screws of the locking device to release the ball, and then tighten them in reverse order, which requires an additional tool.

A well-known universal form with interchangeable bags (AS No. 679410, publ. 1979), comprising a fixed plate and a rigidly attached plate for attaching the fixed part of the interchangeable package, a movable plate and a rigidly attached plate for attaching the movable part of the interchangeable package, between which there are plates of the ejector system, base, guides, centering and fixing elements of the interchangeable package.

In this form, the installation of replaceable packages is carried out in assembled form, including their ejection system. The installation is carried out according to the U-shaped grooves of plates of a universal shape and is pressed by the bolts of the folding slats, which increases the metal consumption and the laboriousness of the manufacture of replaceable bags, as well as increases the time of readjustment of the block form.

The closest technical solution is a universal block (AS No. 1556926, RU), containing a fixed and support plate for attaching plates of a removable package, a movable plate, plates of ejectors, a replaceable package and centering elements in the form of fixed rod stops in the lower part of the fixed and the base plates of the block and the grooves mating with them in the matrix plate and the plate of punches of the removable bag and in the form of removable rods installed by means of fasteners in the grooves of the upper part of the base and fixed plates of the block and plates of the removable bag that one. This technical solution is taken as a prototype.

However, in the known unit for the centering, installation and fastening of the interchangeable package, removable rods are used, which during installation must be secured with additional fasteners, and the interchangeable package must be bolted to the block. The presence of fasteners increases the readjustment time of the unit and complicates the design.

An object of the invention is to expand technical capabilities and increase productivity.

The technical result of the use of the invention is to reduce the readjustment time of the block mold directly on the injection molding machine, as well as to increase the accuracy of fixing the replaceable block mold package and to simplify its fastening elements. The specified technical result is achieved due to the fact that the block form contains a fixed plate, a movable plate, a base, a removable package, an ejection system, guides and centering elements, one of which is installed as fixed pins in the lower part of the base, in addition, two two rails are vertically fixed to the sides of the base, provided with longitudinal grooves, and in them, to the end in the fixed pins, an interchangeable bag is installed, the matrix of which has corresponding bracket-shaped protrusions and is connected to ravlyaetsya locking pins.

Depending on the length of the matrix of the interchangeable bag, which is determined by the size and shape of the manufactured product, the matrix is either fixed on the fixed pins by means of the grooves mating with them, or rests on the pins with the bottom end.

Figure 1 shows the movable part of the block form with one of the interchangeable forming packages (plan); figure 2 is a section aa in figure 1; figure 3 is one of the options for installing a replaceable package.

The universal block form contains a fixed plate 1 with a sprue sleeve 2 and columns 3, a movable plate 4, rigidly connected by bushes 5, 6 and screws 7, 8 with bars 9 and base 10. On the base 10, rails 11 are rigidly connected to the movable the plate 4 and the bars 9, and with the fixing pins 12, and fixed pins 13 are installed in the lower part of the base 10. In the longitudinal grooves of the guides 11, a replaceable forming package 14 is inserted, the matrix 15 of which has corresponding bracket-shaped protrusions. In the plates 16, 17 and in the base 10 and the matrix 15 of the forming package 14, an ejection system is installed.

Depending on the length of the matrix 15 of the interchangeable package 14, the matrix 15 is either fixed on the fixed pins 13 by means of the grooves mating with them, or rests on the pins with the lower end (Fig. 3).

The fixed pins 13, the guides 11 with longitudinal grooves and the locking pins 12 form the centering elements and are used to install, center and fix the interchangeable package 14 in a block form.

Universal block form works as follows. The block form without a replacement bag in closed condition is installed on the injection molding machine. Then, the block form opens to a gap slightly larger than the thickness of the interchangeable package 14. The interchangeable package 14, assembled in advance, is inserted into the longitudinal grooves of the guides 11 from above by the bracket-shaped protrusions of the matrix 15 and is lowered into the fixed pins 13, which provides preliminary fixation of the interchangeable package 14 the longitudinal axis of the block. For the final alignment and fixation of the interchangeable package 14, the pins fixing 12 along the horizontal axis of the block form are inserted into the corresponding holes of the matrix 15 of the interchangeable package 14. The block form is ready for operation.

After injection of the melt and the corresponding exposure, the block form is opened. In this case, the movable part departs from the stationary one, the ejection system is triggered, and the product is removed from the forming nests of the removable package 14. After ejecting, the block form closes and returns to its original position.

To remove the interchangeable bag 14, the form is opened, the locking pins 12 are removed from the holes of the matrix 15 and the interchangeable bag 14 is removed upward.

In the proposed block form, installation, alignment and fixing of interchangeable packages takes no more than 20 seconds.

Claims (1)

A universal block mold for the manufacture of polymer products, containing a fixed and movable plate, a base, an interchangeable bag, an ejector system and centering elements, one of which, made in the form of fixed pins, is installed in the lower part of the base, characterized in that the centering elements further include two rails vertically fixed on two sides of the base, provided with longitudinal grooves and fixing pins, while on the rails all the way into the fixed pins, a removable pa a matrix which has the appropriate skoboobraznye protrusions and connected to the guide, the locking pins.

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