Device and method for compression moulding plastic articles
AssigneeAisapack Holding S.A.
InventorDominique Hanot
Life of this patent
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Abstract
The invention relates to a device for moulding a plastic article in which the article is obtained by the compression of a quantity of plastic material (3) in the molten state between the two parts of a mould, comprising at least one supply of plastic material (1), a rod (11), sliding in a sleeve (8) suitable for temporarily supporting said quantity of plastic material (3), a mould for the head of the article (6, 7) and a mandrel (18) cooperating with said mould (6, 7), characterized in that it comprises non-elastic retaining means (12-14, 23, 24) which are suitable for limiting the bidirectional displacement of the rod (11) in the sleeve (8). The invention also relates to a method using the aforementioned device.
Claims18
A device for moulding a plastic article in which the article is obtained by the compression of a quantity of plastic material in the molten state between two parts of a mould, comprising at least one supply of plastic material, a rod, slidable in a sleeve suitable for temporarily supporting said quantity of plastic material, a mould for a head of the article, and a mandrel cooperating with said mould, wherein the device comprises non-elastic retaining means that are designed for limiting the bidirectional displacement of the rod in the sleeve, wherein the non-elastic retaining means comprise means for retaining in an upper position and means for retaining in a lower position, and wherein the means for retaining in the lower position are formed by a stop arranged on a lower wall of a lateral orifice arranged on the sleeve and a lateral protuberance arranged on the rod, the lateral protuberance being slidably mounted in the lateral orifice.
A device for moulding a plastic article in which the article is obtained by the compression of a quantity of plastic material in the molten state between two parts of a mould, comprising at least one supply of plastic material, a rod, slidable in a sleeve suitable for temporarily supporting said quantity of plastic material, a mould for a head of the article, and a mandrel cooperating with said mould, wherein the device comprises non-elastic retaining means comprising at least two different structures that are designed for limiting the bidirectional displacement of the rod in the sleeve, wherein the non-elastic retaining means comprise means for retaining in an upper position and means for retaining in a lower position, and wherein the means for retaining in the lower position are formed by a stop arranged on a lower wall of a lateral orifice arranged on the sleeve and a lateral protuberance arranged on the rod, the lateral protuberance being slidably mounted in the lateral orifice.
Dependencies are inferred from the claim text.