RU1838121C - Mold for production of plastic pieces with hole - Google Patents

Abstract

Using; in the manufacture of threaded hole products. SUMMARY OF THE INVENTION: a mold for making plastic products with an aperture comprises a movable and fixed half mold, articulated to the half molds and a movable bar for moving the puller 11, a system of levers and forming marks, the color of which is kinematically connected to the inclined columns fixed in the fixed half mold. The mold is provided with a threaded sign mounted in the movable half-mold, formed by at least two radially movable threaded segments and a kinematically connected central wedge mark and an additional inclined column for interacting with the threaded sign, the threaded segments being provided with bushings with springs to limit the movement of the threaded segments, and in the movable half-mold, grooves are made to accommodate the bushings. 7 ill. ate

Description

The invention relates to the field of processing plastics into an article and can be used in the manufacture of articles with a threaded hole.

An object of the invention is to enable the manufacture of articles having threaded holes.

In FIG. 1 shows the mold assembly; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 - section bb in figure 2; in FIG. 4 - section TG in FIG. 2: in FIG. 5 - working repair of the central wedge and two re; bby marks at the moment the threaded marks exit the product in the radial direction; in Fig.6 - the working position of the Central wedge and two threaded signs at the time of exit of the threaded signs

from the product in the axial direction; in FIG. 7 is a mold about the moment of exit of a straight cylindrical sign, a central wedge and two threaded signs from the product in a movable half-mold, and moving the central cylindrical sign in the direction of the connector and the puller down. The mold contains fixed 1 and movable 2 half-molds. The fixed half-mold 1 is equipped with a bracket 3 with a profile slot 4 made in it. The mold is equipped with springs 5, which hold the system of levers 6 and 7 in a constant compressed state. The upper ends of the levers are fixed on a bar 8, rigidly connected by rods 9 through a bar 10 with a puller 11.

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A finger 12 is placed in the longitudinal slot 4 with the possibility of limited movement and is rigidly connected to the fixed half-mold 1.

To form two cylindrical holes in the product, the mold contains rigidly connected to the rod 13 and strap 14, a central cylindrical sign 15, and a cylindrical straight sign 16 located in the movable half-mold 2, the Lever system is equipped with springs 5, holding the lever system is constantly compressed condition.

For the design of the threaded hole in the product, the mold contains a threaded sign formed by a wedge 17 and two threaded segments 18 connected by straps 19 and sliders 20 and connected by an inclined column 1 rigidly mounted in a fixed half-mold 1.

To ensure guaranteed movement of the two threaded segments in the radial direction, they are equipped with bushings 2 with springs 3 for displacement in the axial direction - a slider 20, rigidly connected to the threaded segments 18, and straps 19, also rigidly connected to the central wedge sign 17. To limit the stroke axially threaded signs in the half-mold 2 are provided with grooves 24 into which the bushings 22 enter. In the fixed half-mold 1, an inclined column 25 is rigidly mounted to move the sign 16.

The mold works as follows.

After pouring the polymer into the mold cavity and cooling the plastic product, the movable mold 2 departs from the fixed mold 1 at first by an amount equal to the length of the slot 4. In this case, the cylindrical rectilinear sign 16 slides along the inclined column 5 from the product. At the same time, the central wedge sign 17, sliding along the inclined column 1, is lowered downward, the threaded signs 18 are withdrawn by means of straps 19, the slider 20 and bushings 22 with springs 23 from the thread of the article in the radial direction (Fig. 5). In the further course of the movable half-mold 2, the central

the wedge sign 17 together with the threaded signs 18, sliding along the inclined column 1 leaves the product until the bush 2 (Fig. 6) stops in the groove wall 4. In this case, the levers 6 and 7

the compressed spring 5 retains its original closed state. With further movement of the movable half-mold, the finger 12 abuts against the wall of the longitudinal slot 4 and the lever system opens. In this case, the puller 11 fixed in the bar 10, moves down, removing the product from the Central cylindrical sign 15 (Fig. 7). After removal of the product, the mold returns to its original position, the cylindrical straight sign 16, the central wedge 17 and the threaded signs 18 occupy their position in the mold cavity, the lever system closes and the mold is ready for new polymer filling. Next, the cycle repeats.

The present invention may be used for articles having a thread break in diameter in two opposite places.

Formula and Mold for the manufacture of plastic products with a hole, containing movable and fixed

half molds pivotally connected to half molds and a movable bar for moving the puller, a system of levers and forming marks, some of which are kinematically connected with inclined columns fixed in a fixed half mold, with the exception that it is equipped with a movable half-form with a threaded sign formed by at least two radially movable

threaded segments and kinematically associated with them, a central wedge mark to provide axial movement of the threaded segments and an additional inclined column for

interacting with a threaded sign, wherein the threaded segments are provided with bushings with springs to limit the movement of the threaded segments, and grooves are made in the movable half-mold

placement of bushings.

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