Epoxy encapsulation mould of coreless armature and encapsulation method thereof

Abstract

The invention discloses an epoxy encapsulation mould of a coreless armature and an encapsulation method thereof. The mould comprises a material returning device, a bottom plate, an upper template, an encapsulation middle ring, a material returning plate, a guide pillar, a fixed plate, a bottom template and a middle mould core, wherein the upper template is provided with a feeding hole; the encapsulation middle ring is arranged between the bottom plate and the upper template and provided with a gas vent; the material returning plate is arranged at the lower end of the encapsulation middle ring; the guide pillar is fixed on the bottom plate after penetrating through the upper template and the encapsulation middle ring; the fixed plate is arranged at the center of the bottom of the bottom plate through a screw; the bottom template is arranged between the material returning plate and the fixed plate; and the middle mould core is arranged on the bottom template and matched with the encapsulation middle ring. According to the mould provided by the invention, both the appearance quality and the precision of the produced epoxy resin encapsulation devices are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of processing permanent magnet DC servo motors, and in particular relates to an epoxy potting mold for a hollow cup armature and a potting method thereof. Background technique [0002] During the processing of the armature of the hollow cup permanent magnet DC servo motor, after the potting is completed in the traditional potting mold, the module is removed and fixed on the curing mold for later curing treatment, that is, the potting process and the curing process are carried out in different on the mold. However, the accuracy of all parts of the traditional potting mold and curing mold is guaranteed by mechanical processing methods. Due to the limitations of the design structure (the inner hole of the middle mold core is too long, the positioning surface of the stripper plate and the potting middle ring and the middle mold core is too large) Short, etc.), the precision of the combined mold (such as the con...

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Problems solved by technology

However, the accuracy of all parts of the traditional potting mold and curing mold is guaranteed by mechanical processing methods. Due to the limitations of the design structure (the inner hole of the middle mold core is too long, the positioning surface of the stripper plate and the potting middle ring and the middle mold core is too large) Short, etc.), the precision of the combined mold (such as the concentricity of the inner hole of the middle mold core to the outer circle, the verticality of the inner hole to the end face; the concentricity of the inner hole of the potting middle ring to the outer circle of the middle mold core, etc.) is poor, The beating of the cup body after potting is poor, which affects the vibration of the whole machine

[0003] When the armature cup body is removed from the potting mold, because the positioning surface is too short, the potting middle ring is prone to tilt and hit the armature cup, resulting in deformation of the cup body or damage to the surface and winding. It needs to be reinstalled during later curing. The curing mold is used for curing. When the mold is withdrawn, the armature cup is withdrawn by the method of pin top shaft. Due to temperature changes, low precision of the shape and position of the curing mold, unreasonable ejection method, manual touch and other reasons, the quality and accuracy of the cup body are further deteriorated. decline

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