RU1775307C - Mould for manufacture of articles from plastic materials by inflation - Google Patents

Description

The invention relates to the processing of plastics and can be used to manufacture products by blowing a tubular workpiece.

A known form for the manufacture of hollow articles from thermoplastic materials by extrusion blown comprising two half-molds and a device for separating the flake from the bottom, made in the form of two rotary plates, the diametrically opposite ends of which are pivotally mounted and provided with a device for holding at the time of opening the shape of the free spring-loaded end of the other plate .

The disadvantage of this device is the inability to separate the shell from the neck, a small and uneven force exerted on the shell when it is separated, the low quality of the separation due to

the large width of the remaining donkey after trimming it.

A known form for the manufacture of hollow articles is blown, comprising half-matrices with inserts with cutting press members and mounting plates.

A disadvantage of this device is that the trimming edges cannot move relative to the half-matrices and therefore cannot penetrate deeper into the groove than the welded abutment edges therefore cannot cut the groove.

The purpose of the invention is to increase the reliability of separation of the region from the product due to its breakage and due to the observance of the sequence of removal of the mold parts.

The goal is achieved in that the mold is equipped with traverses mounted on inclined columns fixed in the mounting plates, the inserts are fixed on the traverses, and the half-matrices are connected to the mounting plates by means of the rods fixed to them and spring-loaded to the side of the mounting plates by springs mounted on the rods, with atoM, the traverses are equipped with guide columns parallel to the half-matrix connector plane and installed with the possibility of interacting with them, in that it is equipped with a locking device made in the form of a pair of hinges mounted on each mold half hooks, spring-loaded toward each other and mounted to cooperate with each other, wherein the fingers are provided with hooks arranged in openings of cams fixedly attached to the fixing plates.

In FIG. 1 shows a view of an open half mold; not fig. 2 is a view A in FIG. 1; in FIG. 3 is a section BB in FIG. 1 (along the guide elements); in Fig.4 - the position of the workpiece and nozzle in the form; in FIG. 5 is a section BB of FIG. 1 (molds at the time of blowing up the workpiece); Fig. 6 is a step for revealing a shape and a cliff breaking.

The blown plastic mold contains mounting plates 1 with inclined columns 2, half-matrix 3 with inserts 4 forming the bottom of the product, and 5 forming the neck of the product, mounted on traverses b and 7, respectively, interacting with their holes with the inclined columns 2 mounting plates 1.

The traverses 6 and 7 are also equipped with columns 8 parallel to the plane of the connector. The molds and interacting with the half-matrices 3, Through the holes in the body of the half-matrices 3 pass rods 9, which are connected to the mounting plates, interacting with the half-matrices through springs 10, Hooks are pivotally mounted on the half-matrices 3 11, interacting with their teeth 12 with each other, and with their fingers 13 with the groove 14 of the copiers 15, fixed rigidly to the mounting plates 1. The groove 14 of each copier 15 is made of three sections ;. 16 - perpendicular to the plane of the mold connector, 17. located at an angle to the plane of the mold connector and 18 - of the radius portion. The tooth 12 of the hooks 11 have beveled edges 19 with which they interact during operation. Each hook 11 is pressed against each other by a spring 20.

The inserts 4 and 5 have press-ons 21 and an understatement 22 to accommodate the region 23, as well as an opening 24 for the passage of the blowing nozzle 25, enabling the manufacture of article 27 from the blank 26,

The form works as follows.

Extruded tubular workpiece

26 is inserted between the open half-matrices 3 onto the inflatable nozzle 25, after which the left and right half of the form begin

get closer to each other.

When they approach each other, the hook 11 interacts with its beveled edges 19 of the teeth 12 and, having overcome the influence of the springs 20, move away from each other, and their

0 fingers 13 are recessed into the radius portion 18 of the copier base 14 of the copiers 15. After this, the half-molds are closed, and the hooks 11 are brought into contact with each other by the action of the springs 20 and are connected by their teeth 12 to each other. The fingers 13 exit from the radius sections 18 of the grooves 14 in the section 16.

After the mold is closed, compressed air is supplied to the blow nozzle 25. Under the pressure of compressed air, the workpiece is inflated and takes the form of the product 27. The excess part of the workpieces forms an overlay 23, which is placed in the understatement 22.

After technological exposure, the form is opened. Since the tooth 12 of the hooks 11 are connected to each other, in the initial phase of opening, the shapes of the half-matrix 3 remain connected, and the mounting plates 1 depart from them, which, in doing so, are connected by rods 9

0 compress the springs 10. The inclined columns 2 of the mounting plates 1 interact with the traverses 6 and 7 and cause them to move along the axis of the columns 8 away from the product 27, Thanks to the fact that the inserts of the same name 6

5 and 7 in the initial phase of opening the molds are compressed among themselves, they are held by the press ropes 21 of the envelope 23 and when moving away from the product

27 separate the region 23 from the article 27.

Fingers clipped around the moment of separation 13

0 hooks 11 passed the section 16 of the copiers 15 and begin to move along the sections 17, which, with the further movement of the mounting plates 1, carries out the separation of the teeth 12 of the hooks 11. At this phase, open the form

5, under the influence of the springs 10, the half-matrix 3 rush each towards its mounting plate 1, leaving the product 27 on the blowing nozzle 25. When moving the half-matrix 3, the yokes 6 and 7 interact

0 with the inclined columns 2 and approaching the half-matrices 3, the inserts 4 and 5 are installed in the working position. From the collision of the half-matrices 3 with the mounting plates 1, the envelope is separated from the inserts 4 and 5 and falls into

5 hopper blowing arperata.

With further disclosure of the form, the inflatable nozzle 25 moves to the inoperative position and the product 27, tearing off the nozzle, falls into the hopper of the blowing unit. Then the cycle repeats.

Claims (2)

The implementation of the present invention eliminates manual labor for trimming the widest gamut of blown products (bottles, fl, canisters i-i, etc. containers), that is, to increase labor productivity. WHEN USING THE INVENTION: and specialized units with automatic separation devices, there is no need to provide these units with devices for transporting, orienting, gripping; I trimmed the cloud. The invention can be used on rotor-conveyor lines for the manufacture of capacitive products. The formula is invented1; 1. A mold for the manufacture of plastic products with blown material containing half-matrices with inserts with cutting pressants and mounting plates, with the exception that in order to increase the reliability of separation from the product due to its breakage, it equipped with traverses mounted on inclined columns mounted in a c3IIJIiZ7T7 g J 25 on sliding plates, the inserts are fixed on the traverses, and the half-matrices are connected to the mounting plates by means of the rods fixed in them and spring-loaded to the side of the mounting plates by springs installed on the rods, while the traverses are equipped with guide columns parallel to the half-matrix connector plane and installed with the possibility of interact with them. 2. The mold according to claim 1, characterized in that, in order to ensure reliable operation of the mold by observing the serial connection of the mold parts, it is equipped with a locking device made in the form of a pair of hooks pivotally mounted on each half-mold, spring-loaded towards each other and installed with the possibility of interaction with each other, while the hooks are provided with fingers placed in the holes of the copiers, rigidly fixed to the mounting plates. 2 / Shig. 1 & uU / 26; / (Whig 5 27 Shigb