CN206465331U - Resin-cast silicon rubber dead head device - Google Patents

Abstract

The utility model is related to a kind of resin-cast silicon rubber dead head device, it is characterized in that dead head device is made up of base and silicon rubber material hopper, tubular metal base bottom is on cast gate on casting mold or rising head position, and base pore and casting mold intracavity inter-connection, base external wall of upper portion is provided with annular groove, annular projection is provided with silicon rubber hopper neck inwall, silicon rubber hopper neck is arranged on base, its annular projection is located in the annular groove of base, is formed and is fitted close.It is characterized in：Castable is consistent with the cure shrinkage in mould at mould mouth, improves the qualification rate of product insulation electrical performance.The matching of silicon rubber hopper and base is good, improves sealing property.It is hardly damaged, easily cleaning, time saving and energy saving, cost of labor is low, reusable.

Description

Resin-cast silicon rubber dead head device

Technical field

The utility model is related to a kind of resin vacuum casting mold part, and special resin-cast is filled with silicon rubber dead head Put.

Background technology

The mould of existing transducer epoxy resin-cast body or resin-cast product, mostly using certain thickness Steel plate is made, and the dead head device set on casting mold, its material is also that trench structure is made using steel plate.Resin vacuum is poured Note after mould, heating cure shaping is carried out in Cycling hot-blast heating baking oven.Because baking oven has internal heating-up temperature not The problem of, i.e., upper temp is higher than bottom, and the thermal conductivity of steel dead head device is good and positioned at outermost in addition, causes tree Fat casting mixture first solidifies at the dead head of mould, mould inside solidify afterwards, internal castable is obtained in the curing process Less than the timely supplement of castable in dead head device, can occur the cast such as stomata, crackle, shrinkage porosite inside pour mass because lacking material Defect, reduces transformer electrical insulation properties, causes product rejection, increases cost.The temperature difference of multiple die layouts together It is more obvious.In order to overcome this defect, generally done greatly using the dead head device that steel plate is made, to contain more resins Material, resin curing time is increased with this, both have cured the resin-cast material close to steel plate, the center of its dead head device Also resin is in a liquid state, it is ensured that the scarce material that follow-up resin-cast material can in the curing process occur to the resin of mould inside Supplemented, this, which is also required that, commonly uses artificial progress additional fillers in solidification process, to reduce because resin mixture solidification is uneven And all kinds of defects produced, high temperature filler operation adds the labor intensity of operating personnel, improves cost of labor.Meanwhile, also Can because of hand-stuff not in time or support control it is bad, cause mould inside pour bubble or enter semi-solid preparation block resin, also can Product quality is caused to have a strong impact on.This groove profile dead head device manufactured with steel plate, it is big with difficulty of processing, weight weight, Production cost is high and rapid wear is yielding, difficulty is stripped after cast big, it is necessary to often change.The carrying of groove profile dead head device is empty Between it is big, the castable of addition is wasted than larger, and the pressure of automatic filling castable is small.Groove profile dead head device disassembly process compares Trouble, sealing property is poor, easily leaks.

The content of the invention

The purpose of this utility model is that offer is a kind of simple in construction, and light and handy durable, heat conductivility is low, good seal performance, Easy installation and removal, improves the resin-cast silicon rubber dead head device of the automatic stuffing pressure of castable.

Technical solution of the present utility model is：A kind of resin-cast silicon rubber dead head device, it is characterised in that Dead head device is made up of base and silicon rubber material hopper, tubular metal base bottom be arranged on casting mold on cast gate or On rising head position, and base pore and casting mold intracavity inter-connection, base external wall of upper portion is provided with annular groove, silicon rubber material Annular projection is provided with bucket neck inwall, silicon rubber hopper neck is arranged on base, and its annular projection is located at the ring of base In connected in star, formed and be fitted close.

Described silicon rubber hopper is funnel-form.

The characteristics of the utility model is：Resin-cast is with silicon rubber dead head device using the low silicon rubber material of heat conductivility Bucket is combined with steel base, reduces the solidification temperature difference with the castable in mould at mould dead head so that castable exists It is consistent with the cure shrinkage in mould at mould mouthful, improve the qualification rate of product insulation electrical performance.While silicon rubber material The malleable that struggles against is high, and the matching with base is good, improves sealing property, reduces material leakage, and convenient disassembly.Silicon rubber hopper holds The small, feeding height of product is high, and stuffing pressure is big, adds the compactness of resin solidification, reduces the waste of castable.Solidification process In without hand-stuff, while because of silastic material and resin-cast material incompatibility, the resin-cast material on dead head device Easily remove, reduce cleaning difficulty, time saving and energy saving, cost of labor is low.Lightweight, the durable not rapid wear of silicon rubber hopper It is bad, repeat and recycle.Standardized designs, part is general, and manufacturing cost is low.The qualification rate and product quality of production are improved, Again can be bigger reduce cost, comprehensive benefit is high.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model silicon rubber hopper；

Fig. 2 is the utility model use state schematic diagram.

Embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings：

As shown in Figure 1, 2, resin-cast with silicon rubber dead head device is made up of base 5 and silicon rubber hopper 2, base For pipe, it is made of steel material, its top is provided with annular recess 3 on specified altitude, bottom is arranged on casting mold 1 On cast gate, can also on rising head mounting seat, between base and casting mold using welding or thread seal link into an integrated entity, Mould in Fig. 2 is provided with a cast gate and a rising head.Silicon rubber hopper is funnel-form, and charge height is high, when reducing material feeding Flow resistance, annular projection 4 is provided with its neck inwall, silicon rubber hopper is arranged on base, and its annular projection is just It is positioned in the annular groove of base, ensures mutual tight by fit dimension and the malleable of silicon rubber between the two Close fit, while easily installing/dismounting again.

Claims (2)

1. a kind of resin-cast silicon rubber dead head device, it is characterised in that dead head device is by base and silicon rubber material Hopper is constituted, and tubular metal base bottom is on cast gate on casting mold or rising head position, and base pore and casting moulds Has intracavity inter-connection, base external wall of upper portion is provided with annular groove, silicon rubber hopper neck inwall and is provided with annular projection, silicon Rubber hopper neck is arranged on base, and its annular projection is located in the annular groove of base, is formed and is fitted close.

2. a kind of resin-cast silicon rubber dead head device according to claim 1, it is characterised in that described silicon rubber Sizing material bucket is funnel-form.