Custom Molding Experts
In-house molding capabilities
At plasco we own one of the cleanest and better maintained manufacturing sites in the thermoset custom molding industry. And with our 50 injection and compression presses our goal is full customer satisfaction covering all of their molding and second operation needs, especially to meet the technical specifications, dimensional and mechanical characteristics their finished parts require.
It is a process that takes place in vertical presses that have a fixed or mobile stage plate and is powered by a hydraulic piston. The moldable Thermoset material previously weighed is placed on the fixed side of the mold, then the press closes during a specific time to allow the compound to cure and form the molded piece.
It is a process where the plates move horizontally. The material must be loaded into a special deposit which could be a cylinder with a piston stuffer, a plunger or rotating hopper. Then the injection piston pushes the material through the closed mold cavity filling. The dosage of material is controlled by a rotating spindle or auxiliary piston. After curing the mold opens to eject the piece(s) automatically or manually
Like compression molding, transfer molding is a process where the amount of thermoset compound is measured and inserted before the molding takes place. The thermoset compound is preheated and loaded into a chamber known as the pot. A plunger is then used to force the material from the pot through channels known as a sprue and runner system into the mold cavities. The mold remains closed as the material is inserted and is opened to release the part from the sprue and runner. The mold walls are heated to a temperature above the melting point of the mold material; this allows a faster flow of material through the cavities.
