Resources Contact Us Home
Method for forming articles by compression moulding

Image Number 17 for United States Patent #7425293.

Method for forming articles of synthetic material by compression moulding, comprising the following operative stages: inserting a first measured quantity of synthetic material in the plastic state into the cavity of a mould comprising a punch with which it defines a first forming chamber for said measured quantity; pressing said measured quantity to obtain a first portion of the article; opening the mould and inserting a second measured quantity into said cavity; closing the mould by repositioning the punch relative to said cavity to define a second forming chamber; pressing said second measured quantity and again opening the mould, then extracting said article from the punch.The method is implemented by a plant comprising a plurality of forming units (3), and at least one device (5', 5'') for feeding in succession at least two measured quantities (100, 201) of synthetic material in the plastic state to each of said forming units (3, 43, 81), each of said forming units comprising an upper half-mould provided with at least one punch (110, 46) and a lower half-mould comprising at least one die (29, 70, 90, 91) provided with a cavity matching said at least one punch (110, 46), means being provided to align said at least one die with said at least one punch in succession and to drive said die along the alignment axis, and means which collaborate with said at least one punch and said at least one die in such a manner as to define at least two different forming chambers.

  Recently Added Patents
Sensing device and electronic apparatus
Position and orientation measurement apparatus, position and orientation measurement method, and storage medium
Scoring records for sorting by user-specific weights based on relative importance
Digital X-ray detector arrangement and digital X-ray imaging method
Music composition automation including song structure
Semiconductor device
Human activity monitoring device
  Randomly Featured Patents
Phase comparators
Toner for electrophotography
Semiconductor device, and production method for manufacturing such semiconductor device
High efficiency screw feeders for continuous extrusion and refining of soaps, detergents and other similar plastic products
Catalytic epoxidation of alkylene compounds
Rose plant
Synthetic refrigeration oil composition for HFC applications
Access portal including sponge
Piston-pin bearing lubrication system and method for a two-stroke internal combustion engine