SU1366412A1 - Automatic machine for mechanical working of plastic articles - Google Patents

Abstract

The invention relates to the field of machining plastic products and is intended to remove waste. The goal is an increase in performance. For this, the device is equipped with a chip removal unit mounted by a limiter for precise installation of the products, a photo relay with a photo sensor mounted under the tray, two time relays and electromagnets on which bouncers and a limiter are fixed. The unit for the installation of products is made with channels for supplying compressed air. Two pneumatic valves have been introduced into the pneumatic control circuit for connecting the compressed air supply line to the working cavities of the pneumatic cylinders, units for installing the product and removing chips. And il. with

Description

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The invention relates to the machining of parts, of plastics after their compression, and can be used to remove scrap, for example, from furniture rollers.

The purpose of the invention is to increase productivity.

Fig. 1 shows an automatic machine for removing scraped plastic products; a general view; figure 2 - section aa in fig, U; FIG. 3 is a section BB in FIG. 2; Fig. 4 shows the pneumatic circuit of the device.

The machine contains a unit for mounting the product to a processing position, made in the form of a detachable mandrel. On the rod 1 mounted on the frame (not shown), the bracket 2 is fixed in which a cone housing 5 is mounted on the sliding sleeve 3 and the conical sleeve 4, the lower part of the mandrel is installed in the latter in rolling bearings 6 and thrust bearing 7.

The lower end of the tapered bushing 4 is connected with the rod 9 of the pneumatic cylinder 10 of the vertical movement of the lower part 8 of the mandrel 11. The upper part 12 of the mandrel is mounted rotatably from an electric drive (not; turned).

On the side bar J, on the side of the lower part 8 of the mandrel, in the height-adjustable screw 13 of the support 14, a pneumatic cylinder 15 is mounted for horizontal movement of the cutting tool 16, the latter is fixed in a groove of the rod 17 of the pneumatic cylinder 15,

Dp excluding turning of the cone body 5 in the sleeve 4, there is provided a bracket 18 with a roller 19, spaced on the rod 1.

To accelerate the stopping of the lower part 8 of the mandrel, a brake 20 is provided, the electromagnet 21 of which is connected to the control circuit.

The input tray 22 serves to feed a part, for example, a furniture roller, a plastic wheel, made smooth on one side and with a hub with a hole on the other, onto the lower part 8 of the mandrel.

At the end of the entrance slit 22, there is a cut-off 23 for a single-piece supply of products, made in the form of a rod 24 mounted on the bark of an electromagnet 25 connected to a control circuit.

A stopper 26 in the form of a plate bent in a plane perpendicular to the surface of the lower part 8 of the mandrel and fixed on the bark of the electromagnet 27 connected to the control circuit is placed on the side of the lower part 8 of the mandrel.

A photosensor 28 is installed below the entrance tray 22 in its lower part, optically coupled to the light source 29 located behind the casing 30, and an opening for the light beam is made in the protective casing 30,

At the level of the lower part of the cone body 5, the microswitch 31 of the control circuit (.not shown) is placed, while the body 5 is made with a bevel for interaction with the contact of the microswitch 31,

The pneumatic electro valves 32 and 33 by pneumatic lines 34 and 35 are connected to a common air supply line. On the other hand, the pneumatic electric valve 32 is connected to the air supply line 36 to remove the finished product equipped with regulators 37 and 38, Pneumatic electric valve 33 with lines 39, 40 and 41 is connected via throttles 42 and 43 to the working cavities of the pneumatic cylinders 10 and 15, as well as an air supply line 44 for removing chips equipped with a regulator 45,

The pneumatic electro valves 32 and 33 are electrically connected to a control circuit, which includes, in particular, two time relays (not shown).

The device works as follows.

Along the input tray 22, the part is fed to the lower part of the mandrel and, with the help of the limiter 26, is placed at the processing position, the light beam from the source 29 of the light to the photosensor 28 is blocked. Brake 20 releases the lower part 8 of the mandrel, and the cutter 23 prohibits the filing of the next part. The electromagnet 27 of the restrictor 26 and the pneumatic electro-valve 33 are turned on, which opens the air supply from the common line to the working cavity of the pneumatic cylinders 10 and 15 through the throttles 42 and 43. At the same time, the latter are adjusted for sequential operation resulting in the rods 9 and 17 starting to move simultaneously but at different speeds. When vertical

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moving the cone housing 5, which is connected with the rod 9 of the pneumatic cylinder 10, closes the microswitch 3,

Having reached the upper position, the lower part 8 of the mandrel engages with the upper part 12 of the mandrel 11 which rotates from the electric motors. By this time, the cutter 16, mounted on the rod 17 of the pneumatic cylinder 15, is working towards the part, the part is being machined.

Simultaneously with the supply of air to the pneumatic cylinder 15, the air is supplied through the regulator 45 to the pneumatic lip 44 to blow off the chips, therefore, during machining of the part, the chips are removed from the working area.

The time relay shuts off the electromagnets of the limiter 26 and the pneumatic electro-valve 33, the rods 17 and 9 of the pneumatic cylinders 15 and 10 begin to move in the opposite direction. The cutter 16 comes off, the upper and lower parts of the mandrel 11 are disconnected. The time relay switches on the electromagnet of the pneumatic electro-valve 32 controlling the finished part circuit.

The part through the regulator 38 pneumatic line 36 by air is first brought into suspension, and then through the regulator 37 is blown off.

The cone housing 5 softens the microswitch 31,

After removal of the machined part, the light beam from the light source 29 passes to the photosensor 28, the time relays and the electromagnets are turned off and 25, after which the torch

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core 20 and cut-off 23, allowing the next part to approach the machining position. The cycle is repeated. The processing of the product is fully automated and has a high performance.

Claims (1)

Invention Formula  A machine for machining plastic products containing a rotatably mounted unit for mounting a product, filled in the form of a mandrel, connected to a pneumatic cylinder of forward movement, and a clamp mounted above it, a cutting tool with a pneumatic cylinder, a brake, a unit for feeding products with a tray and a cutter, pneumatic and electric control circuits, characterized in that, in order to increase productivity, the device is equipped with a chip removal unit, a smogger under the mandrel m for accurate installation of products, a photo relay with a photo sensor mounted under the tray, a time relay and electromagnets on which the cutter and a limiter are mounted, and the installation section of the products is made with channels for supplying compressed air, and two pneumatic electro electrodes are inserted into the pneumatic control circuit a channel for communication of the compressed air supply line with the working cavities of the pneumatic cylinders, units for installation of the product and removal of chips. FIG. one (pue.Z J t. f if 3