SU1181868A1 - Device for cutting thermoplastic materials - Google Patents

Description

The invention relates to the processing of thermoplastic polymeric materials and can be used when cutting thermoplastic materials in various industries. five

The purpose of the invention is to improve the quality of cutting by adjusting the heating process of the string cutting tool.

FIG. 1 shows a device 10 for cutting thermoplastic materials; figure 2 is the same, the view in the plan; on fig.Z - section aa in figure 2; figure 4 - cut group packaging in the plan; figure 5 - section BB 15 in figure 4; · in figure 6 - section bb In figure 4 ;. in fig. 7 - section G-Y in figure 4; Fig.8 is a view of D in Fig.7.

A device for cutting thermoplastic materials contains a table 1 for placing 20 material to be cut, in which a window is made for a turntable 2 mounted on fingers 3 mounted on table 1. Turning platform 2 is designed 25 for installation and subsequent removal of the material being cut, for example, group packaging 4 (drive rotary platform 2 in the drawing is not shown). On both sides of the rotary plate - 30 forms 2 there are fasteners 5 fixed on the sleeve 1, designed to fix the group package 4 during cutting. Above the turntable 2 is mounted driving the movable body 6, mounted on. columns 7, mounted for movement in the sleeves 8, pressed into the table 1. The free ends of the columns 7 are connected by a strap 9, a spring-loaded spring 10 to the work table 1. On the other hand, the strap 9 is connected via a pull rod 11 to the pedal 12. Between the strap 9 and a sleeve 8 are spring compression 13, serving for a smooth course of the columns 7. The housing 6 is equipped with electro2

magnetic drive 14 with a spring-loaded latch 15 in contact with a groove 16, made on the column 7. The drive movable body 6 consists of rigidly interconnected strips 17-20. The strips 19 and 20 are connected to additional strips 21 and 22 through spring-loaded guides 23, mounted movable in strips 19 and 20. Additional movable strips 21 and 22 for attaching the strings 24 are designed to maintain the required tension of the strings, so that the strings always take a horizontal position, even during heating . In the strips 17-18 and 21-22, grooves 25 are made in which the holders 26 are mounted. The strings are made of nichrome wire. In each slat. All holders are interconnected by a contact current-carrying plate.27 and are mounted in the slats with the help of nuts 28 and washers 29. Such fastening of the holders 26 in the slats ensures their necessary adjustment depending on the size of the packages. If necessary, each of the holders 26 can be removed from the slats, if necessary, readjustment of the drive movable body 6 to other package sizes. The strings 24 are fixed in the holders 26 with screws 30. The holders 26 fixed in the slats 17 and 21 are longer compared to the holders fixed in the slats 18 and 22, due to which the strings 24 are located in different planes parallel to each other in two mutually perpendicular directions.

In the rotary platform 2, the grooves 31 are made that coincide with the cutting lines of the group package 4 and are intended for the release of strings. Adjusting the heating of the strings 24 is carried out through the control system. System

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The control includes a stop 32 fixed on the strap 9, in contact with the microswitches 33 and 34, intended to turn on and off the strings 24, respectively, 5 but, as well as the time relay35 ”. The microswitch 33 is connected to the current source through the time relay 35 with an electromagnetic drive 14 , and microswitch 34 is connected to a current source 10.

The device works as follows.

Cut the group packaging 4 manually placed on the rotary 15

platform 2 between the stops 5 £ tola 1. The operator applies a force P on the pedal 12 and the body 6, which is rigidly connected to the columns 7, overcoming the force of the spring 10, goes down. 20 As the body 6 is lowered, the stop 32 fixed on the bar 9 presses the roller of the microswitch 33, which provides power to the strings 24 of the body 6 by 25 electromagnetic actuator 14 with a spring-loaded lock 15 which, overcoming the spring force, moves to the left and falls into the groove 16 columns 7, preventing further 3θ movement of the case 6 to ensure that the strings 24 are heated until they are in contact with the group package being cut 4. After the time required to heat the strings 24, the relay 35 de-energizes the power netic actuator 14 and spring loaded latch 15 moves to the right column 7, rigidly associated with the housing 6 is moved down and the string 24 in contact with the group

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Packing 4 on sections bb. Group packaging film 4, touching | with heated strings 24, located in the lower plane of the housing 6 is melted with the melting of the edges of the already welded film webs, thereby forming an additional seam.

And since the body 6 goes down further, the strings 24 located in the upper plane are in contact with the group package 4 along the G-H sections and the film c is cut in the same way. other direction. The housing 6 moves down to the stop with a side E of the column 7 into the sleeve 8, and the strings 24 enter the slots 31 of the turntable 2. The stop 32 at this time presses the microswitch 34 and the housing 6 de-energizes, thus cooling the strings 24 when the housing 6 is in the lower position, excluding the seizure of the material being cut by the heated strings during the processing of the stroke of the housing 6. In this case, the group package 4 is cut into separate packages. After removing the force P from the pedal 12, the body 6 under the action of the spring 10 returns to its original position, and the turntable 2 rotates on the fingers 3 (the platform drive is not shown in the drawing) and the packages with the products enter the container (not shown). Platform 2 returns to its original position and the cutting cycle of the next group packaging is repeated.

The use of the invention allows to improve the cutting quality of thermoplastic materials.

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Claims (2)

1. A DEVICE FOR CUTTING THERMOPLASTIC MATERIALS, containing a table for placing the cut a material and a moving movable body with a cutting tool in the form of a main string connected to a source of electrical current for heating it, and a control system that is different in that, in order to improve the quality of cutting, the control system is made in the form of an initial housing position sensor associated with the source current and through the time relay with the drive moving the housing, and the sensor end position of the housing associated with * current source. Fig.? 1181868 > 1181868 2. Device by π. 1, about tl i- is supplied with additional strings, due to the fact that, with the aim, the stunts are placed in two parallel performance improvements, it planes under the angle of each other. one