SU1248826A1 - Apparatus for granulating polymeric materials - Google Patents

Description

one

The invention relates to equipment for the production of granules of predominantly thermoplastic mixtures based on rubbers and rubber and can be applied in the manufacture of rubber products and tire industry.

The purpose of the invention is to improve productivity and reliability,

Figure 1 shows the device, General view; figure 2 is a section aa in FIG. 1, in figure 3 a section BB in figure 2.

A device for granulating polymeric materials comprises a housing 1 with a feed funnel 2 and a worm-to-3 located inside. The molding unit is made in the form of a cylindrical spinneret 4 fixed to the housing 1, inside which pressure rolls 5 are installed,

A shaft b is connected to the worm 3, on which the stand 7 is fixed to the pressure knives 8. At the end of the screw 3 a conical drum 9 is fixed in the windows of which pressure rolls 5 are installed. The conical drum 9 forms an annular tapered tape in the longitudinal direction with the inner wall of the die 4 channel 10. The ends of the rolls 5, facing the screw cutting, are made in the form of a cone 1 1. On the outer side of the conical drum 9, knife plates 12 are installed, interacting with pressure rolls 5. Radial holes 13 are made in the cylindrical die 4.

Installing the pressure rolls in the windows fixed on the end of the screw of the conical drum on which the knife plates, interacting with the rolls, are attached, exclude material from entering the inside of the drum. in the inter-roll space, which can lead to its vulcanisation. This allows granulation at a higher rotational speed of the screw. The implementation of the drum and the ends of the rolls conic contributes to a more rapid and uniform distribution of the mixture fed through the die through the entire length of the rolls.

The device works as follows.

The processed material entering through the hopper 2 into the housing 1 is screwed by a driving screw 3 and fed into a circumferentially narrowed annular channel 10 formed by the inner wall of the cylindrical die 4 and the conical surface of the drum 9. The ends 11 of the pressure rolls 5 are from the worm side The cutting is made conical, which reduces the resistance to movement of the material entering the narrowing annular gap. The material is caught by the pressure rolls 5, is distributed evenly in the annular gap and is squeezed out through the radial holes 13 of the cylindrical die 4 to the outside in the form of separate cords. This material is cut by knives 8 moving over the surface of the die 4 in the form of individual granules. When sticking on the surface of the rolls 5 of granulated material, the latter is cut off from the rolls by plates 12, which prevent the granulated material from getting inside the Barb / 4-L

b b

C.

Fig.Z

Compiled by B. Mikhailova Editor A. Kozoriz Tehred V. Kadar Proofreader I. Muska,

4175/15

Circulation 640 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, st {-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

1. DEVICE FOR GRANULES- DRAWING OF POLYMERIC MATERIALS, comprising a housing with a loading funnel and a drive worm located \ inside it, a molding unit in the form of a cylindrical die mounted on the body, inside of which pressure rolls are installed, and outside - knives connected to the worm, characterized in that, in order to increase productivity and reliability, it is equipped with a conical drum fixed with a smaller base at the end of the worm inside the cylindrical die and knife blades mounted on the drum’s generatrix for interaction ystviya with pinch rolls mounted in the windows made in the drum. 2. The device according to π.1, characterized in that the ends of the pressure rolls facing the worm are conical. o o o o o o o o o o o o o o o o o o o o o o o o o about about about about about ABOUT about ABOUT about about ABOUT about about about ABOUT about ABOUT about about about ABOUT about about about about about about about about about SU „„ 1248826 ί