SU1430288A2 - Apparatus for making articles of polymeric materials - Google Patents

Description

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The invention relates to chemical engineering, in particular to devices for the manufacture of sheets by extrusion molding and is an improvement of the technical solution according to the authors. St. № 1141001

The purpose of the invention is to expand the technological capabilities of the device by obtaining sheets of different widths while maintaining their quality.

Figure 1 shows the proposed device for the manufacture of sheets of polymeric materials, a general view; in fig. 2 is a section A-A in FIG. one; on fig.Z - view B in figure 1 on figure 4 - section bb In figure 1; figure 5 - section GG in figure 1.

The device contains an extruder 1 with a screw 2, an extrusion head 3 with a mouthpiece made of the top, the top, the other 4 and the bottom 5 of the half-form. The upper 4 and lower 5 half-molds are fixed on the brackets 6. The curvilinear surface of the upper 4 and lower 5 half-molds is mated with the surfaces of the upper 7 and lower 8 rolls, the flat end surface of the half-shapes 4 and 5 is matched with the extrusion head 3. The upper 7 and 8 lower rolls are fixed on brackets 6 with the possibility of mixing; vertically up and down along the guides of the frame 9 with the formation of a working gap 10 between them 10. Beams 7 and B are provided with a drive (not shown) of opposite rotation and a working control mechanism a gap 10. Fur The adjustment anism is made in the form of two screw pairs 11 with left and right threads of bevel gears 12 and 13, a connecting shaft 14 and a drive 15. The device also contains a power reel 16, a length sensor 17 and a working clearance correction device 18 10. The device is equipped with a value compensator working gap 10. The compensator is made in the form of a wedge 1 9 with a spring 20. Device with0

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Also, the guides 21 for installing a wedge 19 in them with the possibility of moving it along the axis of the head 3. On the head 3 and half-molds 4 and 5 on the side of the working gap 10 there are grooves 22 for placing the guides 21 in them with the possibility of their movement perpendicular The axis of the head 3. The wedge 19 is mounted with the ability to interact with the rollers 7 and 8 in the zone of their movement. The device is also equipped with an adapter 23 and an extension cord 24 mounted on the extrusion head 3.

The device works as follows.

The upper 7 and lower 8 rolls are set to the specified sheet size (or strip), then the spring wedge 19 is set to the specified sheet size (width). The preheated polymer mixture is forced by screw 2 of the extruder 1 into extrusion head 3, where it fills the space between the upper 4 and lower 5 half-molds. When the pressure reaches a pressure that exceeds the pressure of the mixture into the space between the half-molds, the mixture enters the working gap 10 between the rollers 7 and 8 and the mold-ε into a sheet of a given width and thickness. The free end of the sheet is fixed to the reel 16. After the device has entered the specified mode, the sensor 17 of the length and the device 18 correct the working gap 10. When the width of the resulting sheet increases or decreases during operation of the device, the wedge 19 moves along the guide 20 through the spring 20 the axis of the head 3 in one direction or another, eliminating the gap between the curvilinear surface of half-molds 4 and 5 and. the surface of the rolls 7 and 8, the shape of the sheet with the required new width.

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Claims (1)

DEVICE FOR PRODUCING SHEETS OF POLYMERIC MATERIALS by ed. St. No. 1141001, characterized in that, in order to expand the technological capabilities of the device by obtaining sheets IY11Y of various widths while maintaining their quality, it is equipped with a compensator for the size of the working gap, made in the form of a spring-loaded wedge, and guides for installing the latter with the ability to move along the axis of the head, and grooves are made on the head and half-molds from the side of the working gap to accommodate them guides with the possibility of their movement perpendicular to the axis of the head, and the spring-loaded wedge is mounted with the possibility of interaction with the rolls in the area of their movement. > K)