RU2775068C1 - Thermoforming equipment unit - Google Patents

Abstract

FIELD: thermoforming equipment unit.

SUBSTANCE: invention relates to a thermoforming equipment unit. The effect is achieved by a unit of thermoforming equipment, which contains a molding table-punch, made with the possibility of vertical movement by means of the first pushing mechanism into the thermoforming zone, a heater, made with the possibility of moving in the horizontal direction to the thermoforming zone and back. At the same time, the molding table-punch and the heater are fixed on a movable frame, made with the possibility of moving in the horizontal direction along the guide shafts using the second pushing mechanism. The unit additionally contains a heat exchange plate connected to the molding table-punch by a flexible element made with the possibility of heat transfer.

EFFECT: reducing the vertical stroke of the forming table-punch, ensuring the compactness of the assembly, as well as eliminating the collision of the heater and the forming table-punch.

4 cl, 4 dwg

Description

The invention relates to thermoforming equipment, in particular, for the manufacture of blister packaging by thermal vacuum forming of amorphous films.

From the prior art, a plant for the manufacture of parts from thermoplastic materials is known, containing a multi-position rotary table, a press with a matrix fixed on a movable plate, a heating device with an infrared emitter installed above the multi-position table, characterized in that the press is equipped with an additional movable plate with a punch, and the heating device - an additional infrared emitter located under the multi-position table coaxially with the main infrared emitter, and the plate with the punch is located above the table, the plate with the matrix is under the table, the plane of the matrix and punch is aligned with the plane of the table, and windows for the heating device and presses are made on the multi-position table [RU 2042512, B29C 43/00, B29C 51/18, B30B 15/00, publ. 08/27/1995]

A device for thermoforming is known from the prior art, including a heating station and a molding station, in which upper and lower heaters are provided at the heating station for softening thermoplastic sheet material, one of the heaters is movable between heating and molding stations and is designed to transfer heated sheets from the heating station to the forming station, a means for conveying the sheet, preferably comprising a guide track extending between the stations, a carriage on the guide track, and a sheet gripping means on the carriage. [EP0063462, B29C 51/18, B29C 51/26, B29C 51/42, G05D 23/27, publ. October 27, 1982].

A press is known from the prior art, containing, among other things, a press cylinder mounted on a column and bracket, and a heating plate [JPH10278907 IPC:B29C 51/20; B29C51/42; B65B47/02; publ: 20.10.1998].

The vinyl chloride sheet is attached to the plastic sheet mounting frame, the casting is installed in the mold box. The hot plate is lowered over it by a pressure cylinder, while a small amount of air is blown from the bottom of the box, and the plastic sheet is brought into close contact with the hot plate for heating. Air is blown out of the air hole formed on the hot plate, and the plastic sheet 13 is brought into intimate contact with the mold.

Closest to the claimed invention is a node in a thermoforming device, including a fixed forming table, made with the possibility of vertical movement by, in particular, a pneumatic device, a frame made with the possibility of moving in a horizontal direction to deliver the workpiece to be processed into the area of the forming press, as well as a heater movable horizontally by means of, in particular, a pneumatic device, into the zone of action of the forming press for heating the workpiece. [US2020269487, IPC B29C 51/00; B29C 51/08; B29C 51/26; B29C 51/38; B29C 51/42, publ. 08/27/2020].

The objective of the present invention is to expand the arsenal of technical means related to the nodes of thermoforming equipment.

The technical result is to reduce the vertical stroke of the forming table-punch, ensuring the compactness of the unit, the possibility of forced heating of the heat exchange plate by means of a heater, and also eliminating the collision of the heater and the forming table-punch.

The technical result is achieved by the fact that the thermoforming equipment assembly contains a forming table-punch made with the possibility of vertical movement by means of the first pushing mechanism into the thermoforming zone, a heater made with the possibility of moving in a horizontal direction into the thermoforming zone and back, while the forming table-punch and the heater is fixed on a movable frame, made with the possibility of moving in the horizontal direction along the guide shafts with the help of the second pushing mechanism, and the unit additionally contains a heat exchange plate connected to the molding table-punch by a flexible element made with the possibility of heat transfer.

There is a variant in which the pushing mechanisms are pneumatic cylinders.

There is a variant in which the flexible element is a heat exchange hose

There is a variant in which the heater is made infrared.

In FIG. 1 shows a general view of the thermoforming equipment assembly.

In FIG. 2-4 show the stages of the node operation cycle.

Node 1 (Fig. 1) of thermoforming equipment contains a molding table-punch 2 (Fig. 1, Fig. 2, Fig. 4), the first pushing mechanism 3 (Fig. 1, Fig. 4), as well as a heater 4 (Fig. 1, Fig. 2, Fig. 3). Table 2 and heater 4 are fixed on a movable frame 5 (Fig. 1, Fig. 3, Fig. 4), fixed on guide shafts 6 (Fig. 1, Fig. 3, Fig. 4) by means of linear bearings 7 (Fig. 1 ). In addition, the node 1 contains a second pusher mechanism 8 (Fig. 1, Fig. 3), as well as a heat exchange plate 9 (Fig. 1, Fig. 2, Fig. 4) connected to the table 2 by a flexible element 10 (Fig. 1 ), configured to transfer heat.

In private embodiments of the invention, the pushing mechanisms are pneumatic cylinders, the flexible element is a heat exchange hose, and the heater is infrared.

The operation of the device can be represented as a cycle consisting of three main stages.

In the first stage (Fig. 2) the heater 4 is located directly above the plate 9, heating it, and the table 2 is in the open position.

The second stage (FIG. 3) involves moving the frame 5 by means of the mechanism 8 along the shafts 6 to a position in which the heater 4 is directly above the molded sample and heats it.

The third stage (Fig. 4) includes the movement of the frame 5 along the shafts 6 to its original position, while the vertical movement of the table 2, preheated due to heat transfer from the plate 9 through the element 10, using the mechanism 3 to the closed position, in which the table 2 has a direct effect on the sample to give it a given shape. Then the cycle repeats again.

Mounting on the movable frame of the heater and the forming table-punch eliminates the possibility of their collision at the moment of vertical movement of the forming table-punch to the closed position, since in this case, at each moment of the unit operation cycle, these elements are at a distance from each other.

In addition, the implementation of the movable frame with the possibility of horizontal movement allows forcibly heating the heat exchange plate at the beginning of each cycle of operation of the unit by moving the heater to a position directly above the heat exchange plate, i.e. starting position.

And, finally, the implementation of the assembly with a movable frame and a heat exchange plate connected to the molding table by a flexible element made with the possibility of heat transfer allows to increase its compactness, as well as to reduce the vertical stroke of the molding table-punch compared to devices in which the molding table is equipped with additional heating element.

The use of pneumatic cylinders, a heat exchange hose, and an infrared heater in private embodiments of the invention is most preferable due to the efficiency and reliability of these devices for realizing their own functionality.

Claims (4)

1. A thermoforming equipment assembly containing a molding table-punch made with the possibility of vertical movement by means of the first pushing mechanism into the thermoforming zone, a heater made with the possibility of moving in a horizontal direction into the thermoforming zone and back, characterized in that the molding table-punch and the heater fixed on a movable frame, made with the possibility of moving in a horizontal direction along the guide shafts with the help of the second pushing mechanism, and the unit additionally contains a heat exchange plate connected to the molding table-punch by a flexible element made with the possibility of heat transfer. 2. The unit according to claim 1, characterized in that the pushing mechanisms are pneumatic cylinders. 3. The unit according to claim 1, characterized in that the flexible element is a heat exchange hose. 4. The unit according to claim 1, characterized in that the heater is infrared.

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