Rubber Forming Process

A calendering molding machine.

Rubber forming process. Rubber pad forming rpf is a metalworking process where sheet metal is pressed between a die and a rubber block made of polyurethane under pressure the rubber and sheet metal are driven into the die and conform to its shape forming the part. The flat part was punched on a cnc punch press. The rubber pads can have a general purpose shape like a membrane. Our rubber pad forming process begins with form block a material made from resin board aluminum or plastic.

1 mastication when the elastomer is sheared and the molecules are broken down to give easier flow 2 mixing usually carried out immediately after mastication when additives are incorporated 3 shaping of the viscous mass for example by extrusion or molding and 4 curing when the polymer molecules become. The same rubber punch or die can be used for many different forming blocks. The process is a variable speed process depending upon the product specific criteria. Different techniques of rubber pad forming processes for sheet and tube forming are introduced and advantages.

The sheet material may be implemented into a carrier fabric or laminated onto a film or other means. I need to form thin aluminium 0 5mm using steel punch and rubber mould please correct my words steel punch is basically a long blade with quite simple profile. This pre heating reduces the curing time and allows the rubber to flow easier and fill mold cavities efficiently. Rubber pad forming process is a versatile metal fabrication process used in commercial aerospace automotive and military applications.

The rubber pads used in the process are made of hard urethane with dimensions of 43 inches by 51 inches each about 1 5 inches thick. Rubber forming processes are limited in the depth of parts they can produce this is not true of hydroforming. The process starts out with a blank being loaded in the chamber which is then distributed into several cavities. Rubber injection molding successfully alters the plastics process by heating the rubber and placing it under significantly more pressure per square inch of cavity surface in molding.

Limitations in manufacturing exist because the pressure generated by the rubber is low only 1500 lbs in 2 10mpa. In this beginning stage pre heating takes place in the rubber forcing the rubber to flow through channels. The main advantage of the calendaring process is to produce long and continuous sheets of uniform thickness. The later process is illustrated below.

The forming block was machined on a cnc mill. The form block is then machined according to each customer s unique specifications. Based off of a process intended for the molding of plastics injection molding of rubber began in the mid 1960s. Now the question how to choose rubber hardness shore a.

Rubber press forming a small rib for a horizontal stabilizer. Rubber processing consists of four basic steps.