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AssigneesJohn Peter SEARLE, Gary Wayne FERGUSON
InventorsGary Wayne FERGUSON, John Peter SEARLE, Keith WYNESS
Estimating the term…
A plastics moulding process is provided in which a first (2) and a second plastic part (3) are moulded such that a contact surface is formed between the two parts. The first part (2) is moulded firstly and, whilst at least the contact surface is still in a liquid or plastic state, an attachment promoting powder (16) that is compatible with, and has the characteristic of attaching to, the plastic of the first part (2), is applied to it. Thereafter, the second part (3) is moulded so as to contact the first part at the contact surfaces such that as it solidifies, it attaches to the attachment promoting powder (16) and thereby to the first part (2). The second part (3) may be a plastic foam filling for a hollow first part (2). The attachment promoting powder (16) may be a suitable grade of diatomaceous earth or a natural or synthetic equivalent.
A plastics moulding process in which a first part is moulded and a second part is moulded such that at least a part of its surface is in contact with a surface of the first part during the moulding process with the surfaces that are in contact forming contact surfaces between the two parts, wherein the first part is moulded firstly and, whilst at least the contact surface is still in a liquid or plastic state, applying to at least a part of the contact surface an attachment promoting powder that is compatible with, and has the characteristic of attaching to, the plastic of the first part to form a continuous or discontinuous layer thereof on the contact surface of the first part, and thereafter moulding the second part so as to contact the first part at the contact surfaces such that the plastic of the second part attaches, before or as it solidifies, to the continuous or discontinuous layer of the attachment promoting powder and thereby to the first part.
Dependencies are inferred from the claim text.