Extrusion blow molding machine electric mold opening and closing device and method based on mold electromagnetic attraction

Abstract

The invention relates to an extrusion blow molding machine electric mold opening and closing device and method based on mold electromagnetic attraction. A mold cavity half mold assembly and a mold core half mold assembly in the device are integrally mounted on a machine frame linear guideway through a first slider and a second slider on the mold cavity half mold assembly and the mold core half mold assembly, a bevel gear box and a servo motor are fixedly mounted on a bevel gear box mounting plate of a machine frame, one end of a first ball screw is connected with a first output shaft on the bevel gear box, the other end of the first ball screw is connected with a first screw nut on the mold cavity half mold assembly, one end of a second ball screw is connected with a second output shaft onthe bevel gear box, the other end of the second ball screw is connected with a second screw nut on the mold core half mold assembly, and an output shaft of the servo motor is connected with an inputshaft of the bevel gear box. The servo motor controls the mold cavity half mold assembly and the mold core half mold assembly to realize mold closing and mold opening, and the electromagnetic attraction effect is used, so that generation of a gap between the mold cavity half mold assembly and the mold core half mold assembly under the effect of compressed air is avoided. The invention has the advantages of being compact in structure, low in cost and stable and reliable in clamping process, and facilitating industrial modular application.

Description

technical field [0001] The invention relates to the field of polymer material plastic blow molding machinery, in particular to an electric mold opening and closing device and method for extrusion blow molding machinery based on electromagnetic attraction of moulds. Background technique [0002] Plastic blow molding is the third largest plastic molding method next to extrusion molding and injection molding. The molded products are widely used in industrial fields such as automobiles, packaging, and construction. In recent years, with the stricter requirements of relevant national departments on energy saving and emission reduction, environmental protection directives and standards in the plastic molding process, and the increasing demand for high-quality plastic parts, the blow molding industry is constantly moving towards high precision, high performance, low Development in the direction of cost and low energy consumption has brought severe challenges to the traditional blow...

AI Technical Summary

Problems solved by technology

This mechanical toggle mold opening and closing device has many advantages such as good rigidity, self-locking and remarkable energy-saving effect, but there are still obvious deficiencies in the following aspects: (1) The machining accuracy of the mechanical toggle is demanding, It makes the manufacturing cost high; (2) The way of generating and maintaining the mold clamping force through the mechanical toggle lever self-locking is easy to aggravate the wear of the toggle lever, resulting in unstable mold clamping force and low reliability of mold clamping; (3) There are strict requirements on the thickness of the mold, or it is necessary to set up a mold adjustment device to realize the adjustment of the mold opening and closing stroke and the mold clamping force. The structure is complex and the operation is not convenient.

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