SU1014738A1 - Unit for continuous making of hollow thermoplastic articles - Google Patents

Abstract

UNIT FOR THE CONTINUOUS MANUFACTURE OF HOLLOW PRODUCTS FROM THERMOPLASTS / containing an extruder, a corner of a cell with a mandrel inside, in which a coaxially mounted nipple for supplying compressed air inside, and a forming device made in the form of two drive endless conveyors-. ditch with floor forms mounted on them, characterized in that., with the aim of expanding the technological capabilities of the unit by ensuring the manufacture of long products each ampoule into the half form for the manufacture of one product is made in the form of a series of sections, the first of which is designed along the conveyor forming the bottom, and the last - the neck of the product, and the nipple is equipped with a reciprocating drive. transfer, kinematically connected with a conveyor drive. WITH

Description

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The invention relates to the processing of plastics, namely to aggregates for the continuous manufacture of hollow articles, for example thermoplastic containers.

A known unit for the continuous manufacture of 5 hollow thermoplastic articles, comprising an extruder, a die and a fornucite device, in the form of two alternately working molds which, after being closed, retract the blank 10 for a new product t 3 "

The disadvantage of the known aggregate consists in relatively low productivity, limited by inertial forces arising from the operation of the forming device.

The closest in technical essence and the achieved result to the proposed is an aggregate, for

. continuous manufacture of hollow articles - thermoplastic LH ch, containing

extruder, angular head with. placed inside it a mandrel in which a nipple is aligned with it for supplying compressed air j into the billet. and the forming device, made in the form of two drive endless conveyors with half-molds C2 mounted on them.

The disadvantage of this unit is that it does not allow the manufacture of lengthy hollow articles,

as the size of the product is limited

the size of the form, and an increase in the size of the half-form leads to an increase in the dimensions of the forming device and the power of its drive.

The purpose of the invention is to expand the technological capabilities of the unit by ensuring the manufacture of long-40-dimensional products.

The goal is achieved by the fact that in a unit for continuous manufacture of hollow articles from thermoplastics, comprising: an extruder, an angled 45 head with a spindle valuable inside it, in which a nipple for feeding compressed air inside is installed coaxially with it as drive p endless conveyors with semi-bodies mounted on them, each half-mold for making one product is made in a series of sections, the first of which is designed to form a bottom along the conveyor a, and the last - the neck of the article, wherein the nipple has a drive reciprocating movement is kinematically associated with a drive conveyor .60

FIG. Figure 1 shows a schematic diagram of the assembly at the time of the completion of the molding of the finished product; FIG. 2 - part of the unit at the initial moment of formation of the workpiece; by 5

FIG. 3 - form with a minimum number of sections. .

The unit consists of an extruder 1, an angular head 2 with a mandrel 3 placed inside it, in which a nipple 4 for supplying compressed air is installed coaxially with it. The nipple 7 is equipped with a reciprocating drive, made, for example, in the form of a pneumatic cylinder 5. The forming device is made in the form of two drive endless conveyors b with half-molds 7 mounted on them. Each half-form 7 for the manufacture of one product consists of a series of sections 8, 9 and 10 (Fig. 1.3). Section

8 is designed to form the bottom of the product, section 9 - the middle part, section 10 - the neck of the product

The number of middle sections 9 may vary depending on the requirements of the product, for example, three in figure 1 and one in figure 3.

On one of the shafts (an endless conveyor is not shown), a cam 11 is mounted, which via a pneumatic switch 12 and pipeline 13 connects the upper cavity of the pneumatic cylinder 5 to a source of compressed air, then to the atmosphere.

The nipple 4 is rigidly connected to the piston 4 of the pneumatic cylinder 5, due to which it is driven straight. The nipple 4 is reversed by means of a spring 15.

Forming air over nipple 4 is fed through a nozzle 16 fixed on an air cylinder 5 and then through a transverse one. 17 and 18 longitudinal holes.

The device works as follows.

The melt from the extruder 1 (.fig. 1) enters the angle head 2 and exits from it in the form of tube billet 19 (Fig. 1 and 2). The blank 19 is gripped by sections 8 of the half-molds 7, which define the bottom of the product. Simultaneous extrusion of the workpiece 19 and its selection by sections 8 will occur,

9 and 10 moving with the help of conveyors 6. At this time, nipple 4 is in the upper inoperative position (Fig. 2J, since the upper cavity of the pneumatic cylinder 5 is connected to the atmosphere and the piston 14 is spring 15 raised. When the sections start, 10 half-molds 7 begin which form the neck of the product 20 (Fig. 1), the cam 11 switches the directional pneumatic switch 12, the compressed air flows into the upper cavity of the pneumatic cylinder 5, the piston 14 and with it the nipple 4 go down. Nipple 4 (Fig. 1) em neck of the product 20 and at the same time inflates the workpiece 19 benefit yes | p to the connection of the cavity of product 20 with a source of compressed air through

11 | 6 longitudinal bore. E 18 and a transverse bore 17 in nipple 4. After blowing up the workpiece 19 into the product 20 due to the impact of the cam 11 on the track pneumatic switch 12, the pneumatic cylinder 5 re-communicates with the atmosphere, the spring 15 raises the Nipple 4 (Fig. 2) to the top her (iberaboe) position. This rise should occur earlier than the connection of section 8 of the half-form 7 / bodywork 20.

Then a new molding cycle for the product 20 begins.

Products 20 come out of the unit, connected to each other by a burst that

1014738

can be used for their next transportation, processing, filling, blocking and other auxiliary operations.

The use of the invention will make it possible to manufacture lengthy products without significantly increasing the dimensions of the forming device, to increase productivity by 2-3 compared to existing units, to fully automate the process of manufacturing hollow articles and to provide the possibility of integrating the unit into other automatic L1;

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Claims (1)

2. US patent ED 2954581, cl. 425-326, 1960 prototype. ; UNIT FOR CONTINUOUS MANUFACTURE OF HOLLOW PRODUCTS FROM THERMOPLASTES, containing an extruder, an angular head with a “mandrel placed inside it, in which a nipple is aligned with it for feeding inside. / compressed air blanks, and a forming device made in the form of two drive endless conveyors. .rov with half-forms mounted on them, characterized in that., in order to expand the technological capabilities of the unit by ensuring the manufacture of long products; each half-mold for the manufacture of one product is made in the form of a series of sections, the first of which along the conveyor is intended for forming the bottom, and the last is the neck of the product, and the nipple is equipped with a reciprocating drive. kinematically associated with a conveyor drive.