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
Efficient relay automatic repeat request procedure in broadband wireless access system
Milk frother
Recovery of a hot-pluggable serial communication link
Fluid-borne particle detector
Cake knife handle
Pre-sealing unit for wire-cut electric discharge machine
Focusing apparatus that effectively sets a focus area of an image when a focusing mode is changed
  Randomly Featured Patents
Product packaging
Apparatus for obtaining an enlarged image of a portion of the field of view of an infra-red camera
Control method and system for an automated material handling system
Toilet bowl cleaner
Media connector that allows electrical communication to be established with a media plug
Seats for vehicles, for example, sports vehicles such as go-karts and the like
Controlled electroporation and mass transfer across cell membranes
Connector device
Ramp and pedestal control circuit
Sound motion picture camera