FIELD: laminated products or materials.
SUBSTANCE: invention relates to methods, constructions and structures of injection moulding. Invention provides a joint structure, process equipment and methods of moulding a hollow object, such as a car buffer. Method for injection moulding a hollow article using an injection moulding machine comprises injecting a first, then second portion of moulding material, repositioning one mould for alignment of the first mould. Third portion of moulding material is injected. Second moulding machine is actuated into synchronous operation with offset with the first moulding machine.
EFFECT: method and structure provide a sequence of operations and a system which facilitate alignment of the mould, alignment of parts, strength of material, adaptability of the structure, efficient treatment, reduced labour costs, high rate of manufacture, reduced power consumption per a part, aesthetically attractive surfaces and reduction or elimination of the need for welding.
9 cl, 9 dwg
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