RU10369U1 - VACUUM FORMING MACHINE - Google Patents

Description

VACUUM FORMING MACHINE. The field of technology.

The utility model relates to the processing of thermoplastic sheet materials into a finished product and is intended for the production of off-road dividing road blocks by the vacuum / forming method.

Tech level

A vacuum molding device is known comprising a gas-permeable body, a vacuum system and a gas-permeable element for molding, the body being provided with a gas-permeable sleeve with a cutting edge at the end, and a gas-permeable element installed in the sleeve and spring-loaded relative to it. (see USSR author's certificate No. 1484751, IPC V29C 51/36; B.I. No. 21-1989)

Also known is a vacuum molding device for manufacturing products from a thermoplastic film, containing a base, a clamping frame for clamping the workpiece, which is sealed to the body, a perforated table with a forming element placed on it and a heating unit, the device being provided with a lower part case bypass valve and an elastic gasket located around the perimeter of the desktop to seal the gap between the side walls of the table and the walls of the body mustache. (see RF patent No. 1804391, IPC В29С 51/18; B.I. No. 11 - 1993)

BETWEEN: B29C 51/18

A disadvantage of the known device is the production of different thickness material, which ultimately affects the strength of the product.

The utility of utility model.

The task of creating a real utility model is to increase the strength of the product by obtaining an equal-thickness material by preliminary drawing it, simplifying the design due to the absence of additional nodes when molding other types of products, and the possibility of separate evacuation.

The problem is achieved by the fact that the molding chamber, which is both the forming element, is streamlined and is divided into molding zones.

Separation of the molding chamber into zones ensures uniform distribution of polymer mass during the molding of articles. So, for example, molding in the first zone is intended for parts of products to which particularly high demands are placed (the most exploited part of the product). In the second and third zones, all other sections of the product are being molded.

The heating unit of the vacuum molding machine is made in the form of rotary heating chambers located above the molding chamber.

other objectives and advantages will become apparent from the following detailed description of the device and the accompanying drawings, where

In FIG. I - shows a General view of the vacuum-forming maps in the working position.

In FIG. 2 - vacuum molding machine with extended heating chambers, rear view.

In FIG. 3 is a general view of the molding chamber.

Information confirming the possibility of implementing a utility model.

The wax-molding machine consists of a base 1 made of a steel profile weld structure with internal pneumatic 2 and vacuum 3 connection units. On the base 1, a molding chamber 4 is placed, which is a forming element corresponding to the configuration of the molded product and is made with vacuum holes 5. The rotary heating chambers 6, 7 with mounted tubular electric heaters of a figured design are attached to the rear wall of the molding chamber 4. To the walls of the molding chamber 4, a lifting unit 8 of the pressing frame 9, turning units 10 of the heating chambers 6 and 7, a punch of a mechanical sheet pulling during forming grooves and recesses of the product (not shown), a product cooling unit consisting of centrifugal fans are mounted. A control panel and a dashboard are mounted on the front wall of the molding chamber 4. Along the perimeter of the upper part of the molding

chambers 4 are fixed sealing strips 11, on which a sheet blank is placed, pressed against the strips 11 by a clamping frame 9.

The device operates as follows.

The sheet blank is placed in the forming chamber 4 and pressed to the sealing strips And the clamping frame 9. Next, over the blank we install the heating chambers 6 and 7. The heating time is 12-15 minutes and depends on the thickness of the sheet blank. The workpiece begins to soften under the influence of heat, and when it reaches the appropriate temperature it goes into a highly elastic state. Under the influence of the necessary air pressure, the heated preform is pressed against the forming element 4, and a mechanical broaching is carried out using a punch to form grooves and recesses of the product. Further, through the vacuum holes 5 of the chamber 4, air is drawn in through the cavities. After that, the workpiece perceives the exact configuration of the chamber and then is cooled by a directed elevated jet supplied from the axial fans of the cooling unit. Next, “brush the cooling process to t 50-70C. After cooling and shutdown, the finished product is removed from form 4.

Industrial applicability.

The vacuum molding machine is propsha production tests at the Nelidovo Plastic Plant OJSC and is used in the production line for the manufacture of dividing road blocks.

Claims (1)

A vacuum molding machine comprising a base, a clamping frame for clamping a workpiece, a molding chamber with a forming element and a heating unit, characterized in that the forming chamber, which is also a forming element, is streamlined and divided into molding zones, and the heating unit is made in the form of rotary heating chambers located above the molding chamber.