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
Voltage detection apparatus and combination circuit
Optical navigation device with image sensor and inner housing
Methods and systems for delivering customized advertisements
Using rule induction to identify emerging trends in unstructured text streams
Glow in the dark swim goggle frame and band
Semiconductor memory device and manufacturing method thereof
Method and apparatus for reducing and controlling highway congestion to save on fuel costs
  Randomly Featured Patents
Method of operating a magnetic compass on a machine
Disinfection apparatus with pump device
Image display apparatus having casings foldable relative to each other
Exercising device
Passenger seat with fabric suspension legrest
Endface assessment
Telephonic-interface statistical analysis system
Generic method for latex agglutination assays
Method for making a biodegradable adhesive for soft living tissue
Two-sided thermal print command