SU839708A2 - Device for shaping bells in polymeric tubes - Google Patents

Description

(54) DEVICE FOR FORMING MILK IN POLYMERIC PIPES

I

The invention relates to the chemical industry.

According to the main author. St. No. 617274, a device for forming sockets is known, comprising a housing mounted on a rotary table, heaters, a forming element made in the form of a hollow cylindrical mandrel cut along forming radial direction movable reciprocally along the axis of the mandrel wedge , a ram with a rod connected to a wedge, the device has clamps for a polymer pipe 1.

However, this device does not provide uniform longitudinal stretching of the polymer pipe around the perimeter. When forming the socket in the places of attachment of the clamping pipe, the exhaust is larger than between them. The unevenness of the exhaust reduces the quality of the molded sockets.

The purpose of the invention is to provide a uniform longitudinal stretching of the pipe during the molding of the socket.

This goal is achieved by the fact that the device is provided with a pipe clamp made in the form of a ring, and the piston of the power cylinder is provided with an additional rod, kinematically connected with the pipe clamp by means of a cross bar mounted on the power cylinder with movement of the strings and traction and fixed adaptations.

The locking device is made in the form of a ring fixed on the toes with clamps in the form of fingers and a nut mounted on an additional brush with an annular groove on the outer surface.

On .fig. 1 shows a common device

5 eid; in fig. 2 shows section A-A in FIG. one.

Claims (2)

The device contains a frame 1, a support plate 2, below which the power pneumatic cylinder 3 is rigidly fixed, and the top mount 4 is mounted on top, through the center hole of which passes the rod 5 of the power pneumatic cylinder 3. On the subfoamer 4 on bearings 6 a rotary table 7 is mounted with a fixed on it housing 8. On frame 1, an electric actuator 9 is mounted with a gear 10. Inside housing 8, a multifaceted wedge 11 is mounted for reciprocating along its longitudinal axis 11. Wedge 11 is mounted on rod 5 of power inevmolinder 3 rotatably around the stem. The edges of the wedge 11 are connected by means of guide grooves to the rods 12, at the ends of which the sectors 13 of the sliding forming mandrel are reinforced. Heaters 4 are mounted on the guiding frames 1, placed on horseshoe bogies 15 driven by pneumatic cylinders 16. The power pneumatic cylinder is equipped with an additional rod 17. The device is equipped with clips — the upper 18 and lower 19, made in the ring zide kinematically connected to the stem 17 the pneumatic cylinder by means of the traverse 20 mounted on the pneumatic cylinder with the displacement in it of the rods 21 and t g 22 and the locking device made in the form of a ring 23 with clamps 24 in ide fingers and nut 25 with an annular groove on the outer surface mounted on the rod 17. The frame 1 mounted retainers 26 which interact with the ring 23. The frame 1 mounted pedestals control consoles 27. The apparatus operates as follows. With the heater 14 retracted to the housing 8 and the compressed sectors of the sliding forming mandrel, the polymer tube 28 is put on and secured with the upper clamp 18. The heaters 14 are moved along the guides by means of pneumatic cylinders 16 and are closed around the sliding forming mandrel and polymer tube 28. Then the electric actuator 9 is turned on and through the gear train 10, the rotary table 7 is rotated with the housing 8 in the bearings 6 of the subframe 4. The rotation of the housing 8 is carried out with the heaters 14j turned on as a result uniform heating of the polymer tube and its softening. The heaters and rotary table rotation drive are then turned off. Heaters 14 are retracted to their original position. Compressed air is supplied to the lower piston chamber of the pneumatic cylinder 3, which raises the rod 5 with the multi-faceted wedge 11 and the nut 25, the ring 23 tons, 22, the crosspiece 20, the rods 21 and the clamp 19. When the ring 23 rises to the level of the retainers 26, the latter interact with the ring 23 and stop it, as well as the associated straps 22, the yoke 20, the rods 21 and the clamp 19. The clamp 19 is then set in the upper (working) position. At the same time, the lugs 24 on the ring 23 emerge from the annular groove, which is located on the side surface of the nut 25, due to which the wiper 5 with the multi-faceted wedge 11 continues to move upwards to the extreme position due to the size of the working stroke of the pneumatic cylinder and providing the spacing 13 up to required diameter At the end of the sliding of the sectors 13 of the forming mandrel, the lower part of the sleeve is clamped between the mandrel and the clamp 19. After cooling the product, the forming mandrel returns to its original position, and the rod 5 together with the nut 25 will move down. When the annular groove of the nut 25 reaches the level of the retainers 24, the latter are inserted into the annular groove of the nut 25, and the retainers 26 mounted on the frame b interact with the ring 23, therefore during further movement of the rod 5 the ring 23 also moves with it and the nut 25 as well as the associated links 22, yoke 20, shanks 21 and clamp 19. Next, the product is removed from the device and the cycle is repeated. The design of the bottom clip in the form of a ring allows for a uniform longitudinal stretching of the pipe during the molding of the socket and thus 1.5-2.0 times higher quality of the molded products. The invention The device for forming sockets in polymer pipes according to ed. St. No. 617274, characterized in that, in order to ensure uniform longitudinal stretching of the pipe during the molding of the bell, it is provided with a pipe clamp made in the form of a ring, and the piston of the power cylinder is provided with an additional stem connected with a pipe clamp the cylinder with the possibility of moving the crosshead, with the strings fixed in it and t ha.mi, and the fixing device. 2. The device according to claim 1, characterized in that the fixing device is made in the form of a ring fixed on the toes with clamps in the form of fingers and a nut mounted on an additional brush with an annular groove on the outer surface. Sources of information taken into account in the examination 1. USSR author's certificate №617274, cl. In 29 C 17/00, 1976 (prototype).