Adjustable technological mould cover of plastic-lined steel flange

Abstract

The invention belongs to the field of rotational moulding equipment, and in particular relates to an adjustable technological mould cover of a plastic-lined steel flange. Bolts are welded on the outer circumference of an outer sleeve with a folding edge, the end part of a support with a central through hole is welded with the head parts of the bolts, a first nut is fixedly arranged in the through hole of the support, a threaded rod of a holddown bolt is screwed into the first nut, moreover, the lower end of the holddown bolt is fixedly connected with a movable cover plate, and the movable cover plate is arranged in an outer sleeve body in a sliding manner. The adjustable technological mould cover is adopted, the movable cover plate only needs to be correspondingly adjusted after rotational moulding, and an ideal flange blank can be obtained after a rotational moulding lining layer is cooled; and the obtained flange is compact in layer and does not generate an internal empty phenomenon, and the moulded flange surface smoothness is effectively improved, so that the rotational moulding flange layer with satisfied quality requirements is provided for subsequent perforating and sealing surface processing.

Description

technical field [0001] The invention belongs to the field of rotational molding equipment, in particular to a steel-lined plastic flange adjustable process mold cover. Background technique [0002] The process mold cover of the steel flange of the steel-lined plastic container in the prior art is generally a fixed mold cover (such as Figure 6 , Figure 7 shown), directly fastened to the steel body flange by bolts in use. During the rotomolding process of steel-lined plastic containers, due to the instability of the operator's control of technical problems, it often leads to hollow or bridging phenomena in the flange-lined plastic layer, which does not meet the requirements of ideal molding. For places where the flange layer is hollow or bridging, manual welding repair is required, but the welded flange lining plastic layer will also cause potential defects such as false welding and gaps due to the instability of the welding repair technology. Leakage occurs over time. Th...

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Problems solved by technology

[0003] The defects of the plastic lining of the flange mainly include: burnt, lack of meat (such as Figure 10 shown), air bubbles, hollow (such as Figure 8 shown), bridging (such as Figure 9 As shown), etc., except that burning is caused by poor temperature control, other problems are caused by the process cover: the thickness of the cover is too small, the powder is blocked at the entrance before it can enter the cavity, and there will be meat shortage, bridging, Air bubbles; too thick a cover will be hollow

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