Plastic mould self-heating device

Abstract

The invention relates to a plastic mould self-heating device, and relates to a mould heating unit. The self-heating device is characterized in that a main body frame (1) is connected with a stretching beam (12), and the front end of the stretching beam is connected with a middle heating unit (6); the upper part and the lower part of the heating unit are respectively fixed on a middle heater through a universal adjuster (5), and driving nuts arranged on the upper part and the lower part of the heater are also fixed on the middle heater; a stretching beam motor (13), a stretching beam reductor (14), a gear (15) and a rack (16) are conjugated to form a fore-and-aft movement state; and an upper heating unit and a lower heating unit are respectively connected with a lead screw and the nuts through a lower part heating unit motor (2), an upper part heating unit motor (8), a lower part heating unit device reductor (3) and an upper part reductor (9), and surrounds the middle heating unit to form a rotating shape. The device provided by the invention can not appear phenomena of not enough the temperature and overfiring caused by extortionate temperature can not appeared in a heating process, and the product quality can be obviously improved.

Description

technical field [0001] The invention relates to a mold heating device, in particular to an automatic heating device for plastic molds. A multi-functional automatic device for heating the mold in the integral molding process of the plastic cylinder. Background technique [0002] The overall molding of the plastic cylinder is to heat the raw materials to a molten state through an extruder and extrude a paste-like strip. The strips overlap, spirally wound on the preheated mold, and are automatically squeezed on the mold by a pressure roller. On the material belt, the material belt is continuously melted, and the mold rotates and moves at the same time, and is continuously wound into one body, and then cooled and demolded to realize the overall forming of a weldless cylinder. The winding thickness is determined by the designer according to the force of the cylinder, the part with a large force is thicker, and the part with a small force is thinner. The thickness of the same c...

AI Technical Summary

Problems solved by technology

[0003] In the production of plastic cylinders, the overall molding heating process uses liquefied gas heating. During the heating process of liquefied gas, due to the unstable displacement of liquefied gas and the influence of the quality of liquefied gas, it is difficult to control artificially, so flames often appear when burning, and The size of the flame is unstable and cannot be controlled, so the heating temperature cannot be controlled

Over-burning phenomenon often occurs, so that the layers are not fused, delamination occurs, the product qualification rate is low, energy consumption is large, and manpower is wasted

In addition, heating with liquefied petroleum gas also has the disadvantages of emitting harmful gases, causing environmental pollution and unsafe factors.

[0004] In order to solve these defects, the applicant applied for a Chinese patent on March 28, 2001? Far-infrared heaters for producing extruded and wound plastic storage tanks without welds? Patent No. 01240899.9, which replaces gas heating, but due to the plastic cylinder The diameter is different, ∮500~∮3500, the diameter of the mold is different, the radius of curvature of the heater must be adjusted arbitrarily according to the diameter of the mold, the adjustment range of the radius of curvature of the original heater is small, and the heater cover needs to be replaced frequently for processing cylinders with different diameters To meet the heating needs of cylinders with different diameters, it is time-consuming and laborious. Each replacement requires a preheating process to reach the effective temperature, which results in low efficiency, waste of energy, and uneven heating

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