Cutting method and machine for PVC pinch plates

Abstract

The invention discloses a cutting method for PVC pinch plates. The method comprises a clamping step, a cutting clamp, a breaking step and a resetting step. A cutting knife is fixed with a pinch plateby using a clamp; and when the cutting knife and the pinch plate synchronously move along an extrusion direction, the pinch plate in advancing is transversely cut from the upper and lower surfaces ofthe pinch plate, so as to form an upper transverse notch and a lower transverse notch, which are not cut through, and the pinch plate is positively and negatively bent along the upper transverse notchand the lower transverse notch so as to break off the pinch plate along the upper transverse notch and the lower transverse notch. When the method is adopted to carry out fixed-size cutting on the pinch plates continuously output by a pinch plate extruder, the time required for the cutting can be shortened, the yield of a pinch plate production line can be improved, the cut pinch plates are goodin end edge flatness and no cutting chippings are generated in the cutting process. The invention further discloses a PVC pinch plate cutting machine which adopts the above method; and the PVC pinch plate cutting machine is shallow in cutting mouth and high in cutting speed so as to create conditions for improving the PVC pinch plate extrusion speed.

Description

Technical field [0001] The invention relates to a cutting method and a cutting machine for PVC gusset plates, in particular to a method for cutting PVC gusset plates to a certain length in a continuous extrusion production line of PVC gusset plates and a PVC gusset plate cutting machine for implementing the method. Background technique [0002] PVC gusset is a commonly used building decoration material, which is made of polyvinyl chloride resin, aging agents, modifiers and other additives through mixing and extrusion processes. In the production process, a gusset cutting machine needs to be installed at the output end of the PVC gusset extruder to cut the gusset continuously output by the extruder to a fixed length, and then print, package, and sell. The gusset cutting machine mostly adopts the flying saw cutting principle, that is: the cutting knife will cut the gusset plate horizontally while moving synchronously with the gusset plate output by the extruder, thereby cutting the...

AI Technical Summary

Problems solved by technology

The PVC gusset cutting machine in the prior art adopts a disc-shaped cutting knife, and the cutting knife is pressed from the upper surface of the gusset to the lower surface for through-cutting when the knife is moving. When using this through-cutting method, the cutting knife needs to cut into the The depth of the gusset cannot be less than the thickness of the gusset. The cutting depth of the cutting knife into the gusset is usually 7-12mm according to the specification of the gusset. Since the depth of the cutting knife into the gusset is relatively large, it is necessary to move the knife when cutting. The speed is relatively slow. Taking a 600mm wide gusset as an example, it takes about 7 seconds to completely cut the gusset, which limits the extrusion speed of the gusset to a certain extent and restricts the production capacity of the production line.

Moreover, due to the large cutting depth, the disc-shaped knife body will squeeze and rub against the gussets on both sides at the incision during the cutting process, resulting in the collapse and deformation of the edge of the incision and a large amount of debris, which not only affects the edge of the gusset The regularity, and the debris generated will also hinder the subsequent printing process and affect the quality of printing

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