Patent RU-2049671-C1 (RU)
Title: Method of manufacture of tubular casings of packing tubes from film welded plastic band and device for its accomplishment
Inventor: SCHEIFELE FREDDY
IPC: B29C65/02
Filed: 1990-07-20
Granted: 1995-12-10
Abstract: FIELD: plastic welding. SUBSTANCE: in manufacture of tubular casings of packing tubes from film welded plastic band fusion of joint area is accomplished by means of heated conveyer belts. In the process of compression down to its partial solidification. Besides, for fusion of the joint area use is made of the metal conveyer belts. The belts are heated by means of a high-frequency induction heater. Preliminary cooling of the joint area is effected by cooling of the clamping mechanism engageable with the conveyer belt. Cooling of the joint area under pressure is effected by means of the cooling unit engageable with the conveyer belt used for abstraction of residual heat from the joint area is accomplished at adjustable compressive load. The heating unit in the device for manufacture of tubular casings of packing tubes from film welded plastic band is made as a high-frequency induction heater. The clamping mechanism is mounted above the upper with a means for its water cooling. The cooling unit is mounted for engagement by means of springs with the upper conveyer belt provided with cooling lines. The heating unit, clamping mechanism, cooling unit and cooling lines are mounted on the base with the aid of a load-bearing plate. The plate is installed for vertical movement relative to the mandrel. Besides, the heating unit is mounted for movement relative to the conveyer upper plate in vertical direction by means of pneumatic or hydraulic actuators. The heating unit is made in the form of lines and mounted for movement relative to the longitudinal axis of the conveyer upper belt. The cooling unit is made up of several spring-loaded cooling blocks following one another in the direction of movement of the conveyer upper belt. The blocks are mounted for engagement spring tension. The conveyer upper belt is installed for engagement with the cooling lines. The lines are located behind the blocks in the direction of movement of the conveyer belt. The conveyer upper belt is furnished tension mechanism. The tension mechanism of the conveyer upper belt is made as an adjusting roller, crank with a tension roller, and actuator installed for shifting. The adjusting roller is engaged from the inner side of the upper branch of the conveyer upper belt. The crank is installed for turning relative to the axis of its attachment. The tension roller is located on one of the free ends of the crank and engaged with the upper branch of the conveyer upper belt. The actuator is positioned on the other free end of the crank. The actuator located on the other free end of the crank is pneumatic or hydraulic one. The tension mechanism of the conveyer upper belt is furnished with a sensor used to control the actuator. One of the guide rollers of the conveyer lower belt is installed for engagement from the inner side of the above belt. The other guide roller from its outer side. The tension roller is installed for turning around the crank, pneumatic or hydraulic actuator, and sensor used to control the actuator. The drive roller of the conveyer upper belt is mounted on the base, and the guide rollers on the load-bearing plate. The drive roller diameter equals the sum of the distance between the axes of the guide rollers and half of their diameters. The conveyer upper belt is provided with an adjusting roller located between the cooling unit and drive roller for engagement with the inner side of the lower branch of the above belt. The mandrel surface in the groove area is furnished with insulation. The forming belt is provided with a tension mechanism. EFFECT: facilitated procedure. 14 cl, 4 dwg