SU1509263A1 - Unit for continuous manufacturing of plastic articles - Google Patents

Abstract

The invention relates to the processing of plastics and is intended to produce castings from thermoplastic materials, in particular, paraffin tiles. The purpose of the invention is to increase the reliability of the installation in operation and expand its operational capabilities. For this, the unloading device is installed under the upper branch of the conveying body. The discharge sheet 27 is located parallel to its upper branch. Below the drive drum 19 an additional drum 24 is installed for the lower branch of the transporting organ. In the section between the drums and parallel to the lower branch of the transporting body, there is an inclined guide 25 with a curved output section 26. Curved guides 29 and 30 are mounted for unloading along the movement of the transporting body in a vertical plane. The guides 29 and 30 are mounted towards each other by convex surfaces and directed with their free ends down. To prevent damage to the coating, the molds interact with the discharge point of the mold 2 with ribs protruding beyond their walls. Forms 2 are filled with melt using a loading device and the transporting body is moved from top to bottom through the cooling chamber. When rounding the forms 2 of the drum 19 due to their interaction with the output end 26 of the inclined guide 25, they turn over and fall onto the discharge sheet 27. The finished products fall out of the forms and the forms are moved by the transporting body to the curved guides 29 and 30. With the latter forms translate into a horizontal position. 2 hp ff, 6 ill.

Description

The invention relates to the processing of plastics and is intended to produce castings from thermoplastic materials, in particular paraffin tiles.

The purpose of the invention is to increase the reliability of the installation in operation and expand its operational capabilities.

FIG. 1 schematically shows the proposed plant for the continuous manufacture of articles of plastics; d in fig. 2 - a fragment of the installation in the area of unloading; in fig. 3 is a section A-A in FIG. one; in fig. 4 is a section BB in FIG. 3; in fig. 5 - form; in fig. 6 shows a section B-B in FIG. five.

The plant for the continuous manufacture of plastics products contains an endless transporting body

1, articulated forms on it

2, a refrigerating chamber 3, air coolers 4, mounted above the upper branch 20 of the transporting organ, the device 5 for loading the material in the mold and the device 6 for unloading products.

The transporting body 1 is made in the form of a multi-ruled chain conveyor with stub-roller chains of which the leading 7 and the driven 8 semi-axes of the rollers of 9 forms 2 are connected.

The device 5 for loading material into molds contains a heated tank 10 with a melt level regulator and measuring tanks 11. Each measuring tank 11 has a spring-loaded inlet valve 12 and an exhaust valve 13, which is connected to the heated exhaust nozzle via nozzles 14. The inlet and exhaust valves through the cams 15 are connected to a camshaft 16, the drive of which is made in the form of a chain transmission 17. A transmission drive sprocket 17 is mounted on the shaft 18 of the driving drum 19 of the transporting member 1 for synchronization odachi forms a device 40 for loading the material and opening its exhaust valves.

The refrigerating chamber 3 is formed inside the conveyor frame by side heat insulating doors 20, the bottom of the frame 21 and the heat insulating ceiling 22 installed under the second brown of the conveyor. The refrigerator compartment 3 is divided by a partition 23 into upper and lower channels.

The multi brown conveyor contains eight Rus, of which the two upper ones are located above the refrigerator compartment, and the rest in the refrigerator compartment itself.

An additional drum 24 is installed below the driving drum 19 for the lower branch of the transporting organ 1. Parallel to the section of the lower branch of the transporting organ 1 between the drums 19 and 24, an inclined guide 25 is installed with a curvilinear output section 26.

35

d

five

0

five

0

five

The device 6 for unloading products contains a discharge sheet 27 and horizontal guides 28. Sheet 27 is located parallel to the upper branch of the transporting body 1.

For tilting the forms in the vertical plane, the installation is equipped with curved guides 29 and 30. The latter are installed with a gap relative to each other under the upper branch of the transporting organ 1. Curved guides 29 and 30 are installed opposite each other by convex surfaces and are directed with free ends down.

To prevent damage to the coating of the mold 2 when interacting with the discharge sheet 27, they are made with ribs 31 protruding beyond their walls.

The installation works as follows.

With the passage of forms 2 under the nozzles of 14 measuring tanks 11, one group of cams 15 of the camshaft 16 of the device 5 presses the stems of the exhaust valves 13 and the portions of the plastic melt are filled with forms 2.

After closing the exhaust valves 13 of a friend, a group of cams 13 of the camshaft 16 opens the intake valves 12. At the same time, the melt 11 (according to the law of communicating vessels) enters the measuring tanks 11 from the heated tank 10. The level of the melt in the tank is regulated by means of a level regulator, which opens the entry of the melt from the commodity tank through a heated pipeline (not shown).

Filled with the melt of form 2 by the transporting body 1, they move along the two upper russes located above the refrigerating chamber 3. At the same time, due to a sufficiently large temperature difference between the melt (70 ° C) and the surrounding air, the plastic mass is pre-cooled to its crystallization temperature, the duration of which is significantly depends on ambient temperature.

Next, the form 2 enters the upper channel of the refrigerating chamber 3, which receives the coldest air directly from two parallel air coolers 4.

The form with the cooled plastic mass flows from the refrigerating chamber to the inclined guide 25 and, when interacting with the latter, is pressed to the device 6 for unloading. Using the output end 26 of the inclined guide 25, when the transporting body 1 of the driving drum 19 bends around, the forms are rotated in a vertical plane relative to the semi-axes 7 and the forms 2 fall onto the unloading sheet 27. With the incision, the edges of the 31 forms hit the unloading sheet 27, which ensures trouble-free dropping out products 32 from molds and prevents the destruction of the inner coating of the molds.

Since the discharge sheet is installed under tilted molds with a small gap (smaller height of products), the back walls of the molds mix the dropped out products 32 along the discharge sheet onto the upper strip of the selection conveyor 33 located below the discharge sheet. At the end of the mix, the products 32 completely fall out of the molds 2, after which the selection conveyor 33 automatically switches on the products to be packaged.

Upon further movement of the overturned forms 2, their driven rollers mix up along curved guides 29 and 30, ensuring free rotation of the forms 2 relative to the leading semi-axes 7 and their return to their original position under the nozzles 14 of the device 5 for loading.

The installation is reliable in operation, has a low power consumption.

Claims (3)

1. Installation for continuous manufacture of products from plastics, containing an endless transporting body, articulated forms on it with the possibility of changing its position when bending around a driving drum transporting body, installed5 Q 5 Q five A device for loading material into forms and a device for unloading products with a discharge sheet, characterized in that the device is loaded above the upper branch of the transporting organ. that, in order to increase the reliability of the installation in operation and expand its operational capabilities, the unloading device is installed under the upper branch of the transporting organ, and the discharge sheet is located parallel to its upper branch, and the installation is equipped with an additional drum for the lower branch of the transporting organ installed below the driving drum, an inclined guide with a curved output section located parallel to the section of the lower branch of the transporting organ in the area between the additional bearing and driving drums, and curvilinear guides for tilting the forms in a vertical plane, installed with a gap one relative to another under the upper branch of the transporting body after the device for unloading during the movement of the transporting body. 2. An installation according to claim 1, characterized in that the curved guides are set towards each other by convex surfaces and are directed downward with their free ends. 3. Installation according to claim 1, characterized in that, in order to prevent damage to the coating of the mold when interacting with the discharge sheet, the molds are made with ribs protruding beyond their walls. 27 f5 Fie.2 fig L FIG. five