SHEARING

Cold cutting technique of plastic surfaces.
Cutting and drilling thermoplastics in short times at low prices.

SHEARING

Shearing is a tooling operation that allows to cut plastic surfaces. It uses a punch and a matrix, between whose the clearance must be well calibrated. A clearance too high creates burrs and bends the surface borders towards the inside. A clearance too low, instead, causes the early wear of the matrix and of the tool used for the shearing.

Shearing is carried out in a short time at a low price. The punch goes down until it touches the surface. Under the pressure of the punch, the surface bends and gets into the matrix. When the breaking pressure is reached, the surface tears up along the borders of the matrix: now the shearing process is over. On the shearing units of GS Finishing Machines, a feeler checks that the shearing has been carried out.

The interaction between punch and matrix produces holes or full articles of various shapes. The portion of surface removed by the action of the punch is the excess material, called shaving/chip. Instead in the similar operation of punching the portion of surface removed by the action of the punch is the article.

 Shearing is a cold cutting method: the finished materials are not altered, neither on the temperature side nor on the chemical side.

The articles that we can shear can be produced by means of injection moulding, extrusion moulding, compression moulding, thermoforming, blow moulding, suction 2D/3D (2k) and rotational moulding.

Among the articles sheared by the customized machines of GS Finishing Machines there are the following, listed as an example: engine clear-air pipes, engine dirty air pipes, ducts for the air-conditioning of the interior compartment, fuel filling pipes, tanks for liquids and various other components of the engine compartment and of the interior compartment.