Process for manufacturing a moulding plunger for hollow glass objects
AssigneeCastolin S.A.
InventorMichel Pecci
Life of this patent
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Abstract
A method is provided for producing a composite moulding plunger, the plunger including a flanged base mounting for the plunger, the flange having a reduced coaxially extending annular portion to which is adherently bonded a hollow conical plunger formed of flame sprayed material, the conical plunger extending from the base mounting and terminating into a rounded end or peak, the plunger having a wall thickness ranging from about 0.5 to 10 mm. The hollow plunger is preferably formed of a flame sprayed nickel-base alloy selected from the group consisting of Ni-Si-B, Ni-Cr-Si-B and Ni-Cr and a copper alloy.
Claims11
A process for manufacturing a hollow composite moulding plunger for moulding glass objects which comprises:
- providing a cylindrical support element 1 having a substantially conically formed end portion with a rounded peak,
- said support element 1 having a removably fitted solid preform sleeve 2 thereon for use in forming said hollow composite moulding plunger, said sleeve 2 having a reduced coaxially extending annular portion 4, said sleeve 2 being used as a base mounting for said mould plunger,
- said conical end portion of the support being characterized by a releasing surface for enabling the subsequent removal of a plunger flame sprayed thereon,
- flame spraying a releasably adhering layer 3 of plunger-forming material having a wall thickness ranging from about 0.5 mm to 10 mm on said conical end portion,
- the layer of material flame sprayed also covering and forming an adherent bond on said reduced annular extending portion 4 of said removable sleeve,
- and then separating the support element 1 from said flame sprayed layer including the solid sleeve 2 to which said sprayed layer is attached, while maintaining the integrity of the composite moulding plunger comprising said sleeve 2 bonded to said flame sprayed layer 3.
A process for manufacturing a hollow composite moulding plunger for moulding glass objects which comprises:
- providing a cylindrical support element 1 having a substantially conically formed end portion with a rounded peak,
- said support element 1 having a removably fitted solid preform sleeve 2 thereon for use in forming said hollow composite moulding plunger, said sleeve 2 having a reduced coaxially extending annular portion 4, said sleeve 2 being used as a base mounting for said mould plunger,
- said conical end portion of the support being characterized by a releasing surface for enabling the subsequent removal of a plunger flame sprayed thereon,
- flame spraying a releasably adhering layer 3 of plunger-forming material having a wall thickness ranging from about 0.5 mm to 10 mm on said conical end portion,
- the layer of material flame sprayed also covering said forming an adherent bond on said reduced annular extending portion 4 of said removable sleeve and thereby provide an integrated structure of sleeve 2 with flame sprayed layer 3, and then separating the support element 1 from said flame sprayed layer 3 integral with solid sleeve 2 while maintaining the integrity thereof.
Dependencies are inferred from the claim text.