Patent ID: 6200126
Filing Date: 2001-03-13
Classification: B29C

Abstract:
An injection moulding machine, comprising:a plasticizing cylinder;at least one nozzle opening coupled to the plasticizing cylinder;a worm disposed to operate in the plasticizing cylinder, the worm having an axial through-hole;at least one cylinder chamber disposed upstream of the at least one nozzle opening, the at least one cylinder chamber defining a cross-sectional area;a needle shaped piston element disposed through the axial through-hole and disposed to operate in the cylinder chamber, wherein the needle shaped piston element defines a cross-sectional area that is smaller than the cross-sectional area of the at least one cylinder chamber; anda reverse flow barrier disposed between the plasticizing cylinder and the at least one cylinder chamber so as to separate the plasticizing cylinder from the at least one cylinder chamber when the reverse flow barrier is actuated.