CN201275612Y

CN201275612Y - Pair related joint pouring system for moulding large-sized thin-wall die casting

Info

Publication number: CN201275612Y
Application number: CNU2008201454251U
Authority: CN
Inventors: 伊启中; 陈鼎宁; 陈文哲; 翁其金; 王火生; 王乾廷; 林纪宗; 刘昌棋
Original assignee: Fujian University of Technology
Current assignee: Fujian University of Technology
Priority date: 2008-09-04
Filing date: 2008-09-04
Publication date: 2009-07-22
Anticipated expiration: 2018-09-04

Abstract

The utility model relates to a dual-coupling and overlapping gating system used for the molding of a large thin-wall die-casting, which comprises a sprue bushing, a moving die insert, a fixed die insert, a side core, a sprue spreader, ingates, a transversal gate runner, and a straight gate runner. The gating system is characterized in that one ingate is arranged on each of the two side walls of the thin-wall casting; the ingates on the two sides are connected by a dual-coupling and overlapping structure and connected with the transversal gate runner; and after being injecting into the transversal gate runner, the liquid alloy is shunted to the ingates on the two sides and flows into a molding cavity through the dual-coupling and overlapping structure. The flow path of the liquid alloy is short, thereby avoiding the phenomena of coldshut or undesirable fusion welding; when the molding cavity is filled with the alloy backfills, the backfilling materials are balanced, and the flow state of the feeding from single side is totally changed; pressuring and feeding effects are good, shrinkage of the products is small and uniform, and the internal stress is low; in addition, the overlapping part plays a supporting role in the cooling shrinkage, so that the probability of the product buckling deformation is reduced, the spacing between the two side walls changes very little, the product quality is greatly improved, and the time to backfill the cavity is shortened. Therefore, the gating system is an ideal novel gating system for a thin-wall die-casting mold.

Description

A kind of be used for large-sized thin-wall die casting molding to coupling overlap joint running gate system

One, technical field

The utility model relates to the compression casting field, refer more particularly to be used for large thin-wall part die casting molding to coupling overlap joint running gate system.

Two, technical background

In large-scale, accurate, thin-walled, complexity, the casing class with load-carrying properties requirement, the design of support class die casting molding mould, the position of cast gate and the selection of dimensional parameters directly determine the stability of extrusion process.When adopting conventional running gate system, the pressur casting size precision of big specification and surface quality is often on the low side, percent defective is higher.For example: electric slicer aluminium alloy safety guard is that linear dimension surpasses the 400mm box parts, and its primary structure characteristics are to have only two the very short connecting bands in two ends to be connected between two large tracts of land sidewalls of casing.When adopting the cast gate of traditional monolateral charging, promptly only on a sidewall of safety guard, ingate is set, adopt this ingate charging, the liquid alloy flow process is very long, consequently make foundry goods produce cold shut, be not fully filled or welding is bad, cooling is shunk greatly, defective such as the sidewall distortion is serious makes that the spacing between two walls is seriously dwindled, product strength reduces, and brings difficulty to ordinary production.

Three, the utility model content

The purpose of this utility model is to overcome above-mentioned weak point of the prior art and provides a kind of novel that a kind of technology is reliable and stable, part accuracy is high that coupling is overlapped running gate system.

The utility model is realized in the following way: the utility model is mainly by pouring into a mould cover, moving die insert, fixed die insert, side core, branch flow cone, ingate, coupling bridging arrangement, cross gate, sprue being formed.Be equipped with an ingate on the sidewall of thin-wall part both sides, the both sides ingate is used the coupling bridging arrangement is coupled together, and links to each other with cross gate, and liquid alloy injects through behind the cross gate, enters die cavity by the coupling bridging arrangement is branched to the both sides ingate.

In sum, the utility model has many advantages: the liquid alloy flow process is short, avoids producing cold shut or welding bad phenomenon; Charging equilibrium during the alloy filling die cavity, the flow regime when having changed monolateral charging fully; The pressurization feeding is made good use of, and goods shrink little and even, and internal stress is little; Add that overlap plays a supporting role when cooling is shunk, thereby the goods buckling deformation is little, the two side spacing is dwindled minimum, has improved quality of item greatly; Shortened the filling die cavity time.So be that the novel thin-wall part compression mod of a kind of ideal is to coupling overlap joint running gate system device.

Four, description of drawings

Fig. 1 the utility model compression mod structural representation;

Fig. 2 the utility model apparatus for pouring structural representation.

Five, the utility model specific embodiment

Now in conjunction with the accompanying drawings, the utility model specific embodiment is described in detail in detail, as shown in Figure 1, 2, the utility model is mainly by pouring into a mould cover 1, moving die insert 2, fixed die insert 3, side core 4, divide flow cone 5, ingate 6, coupling bridging arrangement 7, cross gate 8, sprue 9 being formed.Be equipped with an ingate 6 on the sidewall of thin-wall part both sides, ingate 6 usefulness in both sides couple together to coupling bridging arrangement 7, and link to each other with cross gate 8, and liquid alloy injects mould flows through behind the cross gate, enters die cavity by the coupling bridging arrangement is branched to the both sides ingate.

Ingate 6 sizes are directly connected to the liquid alloy filling velocity, and filling velocity should be decided according to factors such as foundry goods size, complexity, alloy species.Because therefore ingate 6, should adopt lower filling velocity facing to spacious die cavity.

The design to coupling bridging arrangement 7 on the two side between the ingate 6 is very important, bridging arrangement makes liquid alloy form materials flow stably before entering spacious die cavity, enter to uniform and stable die cavity, spray in order to avoid produce, substantially be the total wall thickness filling method, be characterized in: the ingate sectional area is big, filling speed is lower, and liquid alloy is pushed ahead along total wall thickness, do not produce eddy current, help exhaust.The principle that coupling bridging arrangement size is determined is, its cross section must be greater than ingate, and thickness should be bigger than ingate for this reason.

According to die cavity the orientation is set, the utility model adopts arc tangential cross gate 8, divides four section feedings, and the width of both sides is littler than the middle part, is convenient to control the alloy flow state like this.This cross gate adds coupling bridging type ingate, has reduced the flow process of liquid alloy to greatest extent.

Described sprue 9, but its cast cover 1 and the 5 equal water flowings coolings of branch flow cone, the mold hot balance is good, helps boosting productivity.This sprue version, alloy flow is unobstructed, and resistance is little, and it is respond well to be full of die cavity.

Claims

One kind be used for large-sized thin-wall die casting molding to coupling overlap joint running gate system, include: cast cover (1), moving die insert (2), fixed die insert (3), side core (4), branch flow cone (5), ingate (6), cross gate (8), sprue (9), it is characterized in that: on the sidewall of thin-wall part both sides, be equipped with an ingate (6), both sides ingate (6) is used coupling bridging arrangement (7) is coupled together, and link to each other with cross gate (8), liquid alloy injects mould flows through behind the cross gate, enters die cavity by coupling bridging arrangement (7) is branched to both sides ingate (6).
2. according to claim 1 a kind of be used for large-sized thin-wall die casting molding to coupling overlap joint running gate system, it is characterized in that: described cross section to coupling bridging arrangement (7) is greater than ingate (6).
3. according to claim 2 a kind of be used for large-sized thin-wall die casting molding to coupling overlap joint running gate system, it is characterized in that: described cross gate (8) is the arc tangential.
4. according to claim 3 a kind of be used for large-sized thin-wall die casting molding to coupling overlap joint running gate system, it is characterized in that: its cast cover (1) of described sprue (9) and divide flow cone (5) but all water flowing cool off.