SU1630909A1 - Device for machining polymer material parts - Google Patents

Abstract

This invention relates to the machining of polymers. The purpose of the invention is to improve trimming around the parts with longitudinal grooves. For this, the centering unit is made in the form of a roller table and guide rollers located on the axles above the roller table, and the upper pulling roller is made in the form of a set of copiers in the form of discs with a wedge-shaped surface located on the same line as the guide rollers, to be placed in corresponding grooves details. 4 il.

Description

This invention relates to the machining of polymers.

The purpose of the invention is to improve trimming around the parts with longitudinal grooves.

Figure 1 shows the proposed device, side view; figure 2 is the same, the view in the plan; on fig.Z - section aa in figure 1; figure 4 - section bb in figure 1.

The device comprises a base 1 on which a cutting unit is mounted, including a driving drum 2, circular knives 3 fixed in the knife holders 4, driving pulling rolls 5 and 6, a centering unit consisting of a roller table with rollers 7 and guide rollers 8, located above the roller table on axis 9 and the drive consisting of engine 10, gearbox 11 and chain transmission 12. The knives 3 are pressed to the drum 2 by a pneumatic chamber with housing 13, rod 14 and cuff 15. Air is supplied to pneumatic chambers through flexible hoses 16 from the collector 17. Knife holders 4 move along guide 18 to be set across the cutting width and are locked with screws 19. Upper pivot roll 5 is made in the form of a set of copiers 20 in the form of discs with a wedge-shaped surface. For guiding parts between the lower pulling roller 6 and the drum 2, a platform 21 is installed. After the drum 2, a tray 22 is mounted for dumping parts into a container.

The device works as follows.

Parts 23, which represent a mat with longitudinal grooves in the joints, are placed on the rollers 7 of the roller table and guided under the pulling rollers 5 and 6 so that the rollers 8 are placed in the grooves. When this occurs, the preliminary centering of the mat. Then the copiers 20 complete the centering of the trimmed parts 23. The grooves on the drum 2 are designed to ensure the free movement of the parts when centering, those. to prevent braking from thickened ends

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or stuck oblo. From the pulling rolls 5 and 6, the centered parts arrive at the cutting unit. In this case, the pneumatic chamber of the holder 4 receives air under a pressure of 4-6 kg / cm2. The parts on the platform 21 are guided to the drive drum 2 with knives 3, where the transfer is performed by flushing, with the two extreme knives cutting the ends of the parts, and in the grooves, knife-mounted holders 4 with knives 3 separate the parts. The trimmed burr falls into the windows of tray 22, and the parts fall into the container.

The device allows for trimming of scrap of parts from polymeric materials (in particular, under-rail strip) with continuous supply of parts to the trimming zone, which improves quality due to a simple and reliable centering unit.

Claims (1)

Claims An apparatus for machining parts from polymeric materials, comprising a cutting assembly mounted on the base, including a driving drum and circular knives secured in knives, mounted for movement, driven pulling rolls and a centering unit, characterized in that In order to improve the trimming of the trimmer with parts having longitudinal grooves, the centering unit is made in the form of a roller table and guide rollers located on the axles above the roller table, and the upper profile The roller is made in the form of a set of copiers in the form of disks with a wedge-shaped surface, aligned with the guide rollers, for placement in the respective grooves of the part. eight Fig.Z -23 Fig -V