CN203917813U

CN203917813U - The tapered rising head of casting high pressure moulding

Info

Publication number: CN203917813U
Application number: CN201420361581.7U
Authority: CN
Inventors: 史朝龙; 王凯
Original assignee: Changzhou CSR Auto Parts Co Ltd
Current assignee: CRRC Changzhou Auto Parts Co Ltd
Priority date: 2014-06-30
Filing date: 2014-06-30
Publication date: 2014-11-05
Anticipated expiration: 2024-06-30

Abstract

The utility model relates to the tapered rising head of a kind of casting high pressure moulding, comprise the rising head body of taper and the rising head seat of bottom, described rising head body comprises upper body and lower body, and the tapering α 1 of upper body is less than the tapering α 3 of lower body, the top of described upper body is provided with the pressure cone tank of indent, rising head seat is the spherical shell shape that is more than or equal to lower body base diameter, and left side or the right side of lower body and rising head seat are provided with overhanging riser neck, and the front downside of lower body or rear downside are provided with sprue channel open.The utility model is rational in infrastructure, and feeding is effective, and rising head molten iron utilization rate can reach 8-10%.

Description

The tapered rising head of casting high pressure moulding

Technical field

The utility model relates to the tapered rising head of a kind of casting high pressure moulding, belongs to casting technology field.

Background technology

Casting is to obtain one of main method of engineering goods blank, is the important fundamental technology of mechanical industry, occupies important position in national economy.The reduction of high level of quality control and production cost is more and more crucial.Good gating and riser system design is to guarantee casting quality, improves product yield, reduces the precondition of energy consumption.In casting process, rising head is discharged the air of mould, the impurity in casting metals liquid etc. when casting, due to can compensate that the liquid state of molten metal in die cavity shunk and casting solidification process in contraction, to obtain the sound casting that there is no shrinkage cavity.Therefore big-and-middle-sized foundry goods is all provided with rising head conventionally, conventional rising head molten iron utilization ratio 4% left and right, and green-sand rising head can efficiently solve, riser feeding poor effect, rising head top easily bind in advance, atmosphere cannot enter, the inner negative pressure that easily forms of rising head, feeding efficiency reduces, and even forms rising head and solidifies and take out foundry goods, and riser neck produces the shortcoming of shrinkage cavity, rising head molten iron utilization rate is improved to 2 percentage points, make green-sand rising head molten iron utilization ratio can reach 6% left and right.

Summary of the invention

The purpose of this utility model is to provide a kind of rational in infrastructure, and feeding is effective, can further improve the tapered rising head of casting high pressure moulding of rising head molten iron utilization ratio.

The utility model is that the technical scheme achieving the above object is: the tapered rising head of a kind of casting high pressure moulding, comprise the rising head body of taper and the rising head seat of bottom, it is characterized in that: described rising head body comprises upper body and lower body, and the tapering α 1 of upper body is less than the tapering α 3 of lower body, the top of described upper body is provided with the pressure cone tank of indent, rising head seat is the spherical shell shape that is more than or equal to lower body base diameter, left side or the right side of lower body and rising head seat are provided with overhanging riser neck, and the front downside of lower body or rear downside are provided with sprue channel open.

Its rising head seat of tapered rising head of the present utility model is spherical shell shape, and rising head body is upper body and lower body, make the tapering α 1 of upper body be less than the tapering α 2 of lower body, in addition the top of upper body is provided with the pressure cone tank of indent, therefore tapered rising head is keeping reducing under the modulus prerequisite of bottom the contact area of rising head top and molding sand as far as possible, after pouring and riser systems is full of, at liquid contraction phase rising head top, can depart from very soon molding sand, reduce heat conduction, rising head top crust is postponed, keep rising head liquid level to communicate with atmosphere.The utility model adopts the different rising head bodies of multistage tapering, can effectively reduce rising head top volume, bottom is spherical shell shape, waters and emits in process, makes rising head produce rapidly the draw, can make the liquid systole phase can depart from very soon molding sand, because bottom rising head thermojunction is constant, can effectively guarantee that Feeding channel is unimpeded, can effectively reduce or solve the inside shrinkage porosite of cast pieces of spheroidal, improve cast article quality, make rising head molten iron utilization rate can reach 8-10%.Tapered rising head of the present utility model is used checking for productions such as bent axle, jackshafts, and feeding is effective, and product shrinkage porosite is good.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.

Fig. 1 is the structural representation of tapered rising head for the utility model casting high pressure moulding.

Fig. 2 is the plan structure schematic diagram of Fig. 1.

Wherein: 1-pressure cone tank, 2-upper body, 3-intermediate body member, 4-lower body, 5-transition cambered surface, 6-sprue channel open, 7-riser neck, 8-transition face, 9-rising head seat, 10-thermojunction part, 11-draw part.

The specific embodiment

As shown in Figure 1, the tapered rising head of casting high pressure moulding of the present utility model, comprise the rising head body of taper and the rising head seat 9 of bottom, rising head body comprises upper body 2 and lower body 4, the tapering α 1 of upper body 2 is less than the tapering α 3 of lower body 4, the utility model, by the rising head body of different taperings, can reduce the contact area of rising head top and molding sand as far as possible.As shown in Figure 1, the utility model can be provided with the intermediate body member 3 of at least one transition between upper body 2 and lower body 4, and the tapering α 2 of intermediate body member 3 is greater than the tapering α 1 of upper body 2 and is less than the tapering α 3 of lower body 4, as shown in Figure 1, the utility model is provided with the intermediate body member 3 of a transition, or be provided with a plurality of intermediate body member 3, when intermediate body member 3 adopts the different tapering of multistage, each section of tapering of this intermediate body member 3 increases from top to bottom successively.

As shown in Figure 1, the top of the utility model upper body 2 is provided with the pressure cone tank 1 of indent, can realize the minimal-contact area of upper body 2 top end faces and molding sand, in casting process, draw part 11 on upper body 2 can form very soon, so there is enough feeding iron liquid long-pending.

See Fig. 1, shown in 2, the utility model rising head seat 9 is for being more than or equal to the spherical shell shape of lower body 4 diameters, the thermojunction part 10 of rising head is between lower body 4 and rising head seat 9, left side or the right side of lower body 4 and rising head seat 9 are provided with overhanging riser neck 7, riser neck 7 forms by the transition cambered surface 5 with lower body 4 conical surface surface blendings with the tangent transition face 8 of rising head seat 9 spheres, this transition face 8 can be arcwall face or plane, distance B between riser neck end face and rising head body central axis is at 60-85mm, if B is at 75mm, under the utility model, the front downside of body 4 or rear downside are provided with sprue channel open 6, therefore the utility model rising head top volume is little, the liquid systole phase can depart from molding sand very soon, bottom rising head thermojunction part 10 is constant, can effectively guarantee that Feeding channel is unimpeded.

See shown in Fig. 1,2, the height H 1 of the utility model upper body 2 is more than or equal to the height H 2 of lower body 4, the height H 1 of upper upper body 2 at the tapering α 1 of upper body 2 at 20～40 °, if the tapering α 1 of upper body 2 is at 25～35 °, the diameter D2 of upper body 2 end faces is at 30-40mm, the angle beta of pressure cone tank 1 at 50-80 °, notch diameter D1 at 20-30mm.Under the utility model, the tapering α 3 of body 4 is at 75～89 °, and the rising head diameter D3 of lower body 4 bottoms is at 100-130mm, and the spherical radius R of rising head seat 9 is at 50-65mm, and top box height H is at 130-165mm.The modulus Mr of the utility model rising head can be arranged between 1.5-1.8 according to product modulus Ms difference, can suitably adjust size according to different product size, but rising head shape invariance.

When tapered rising head of the present utility model is cast for crankshaft of diesel engine, its modulus Mr is 1.7.See Fig. 1, shown in 2, the tapering α 3 of lower body 4 is at 80 °, the tapering α 2 of intermediate body member 3 is at 70 °, the tapering α 1 of upper body 2 is at 30 °, the angle beta of pressure cone tank 1 is at 60 °, diameter D1 is at 25mm, upper body 2 end face diameter D2 are at 35mm, upper body 2 height H 1 are at 75mm, lower body 4 height H 2 are at 60mm, the rising head diameter D3 of lower body 4 bottoms is at 110mm, the spherical radius R of rising head seat 9 is at 55mm, distance B between riser neck end face and rising head body central axis is at 70mm, top box height H is at 140mm, rising head total height is at 195mm, rising head molten iron utilization rate reaches 10%, there is good feeding effect.

Claims

1. cast the tapered rising head of high pressure moulding for one kind, comprise the rising head body of taper and the rising head seat (9) of bottom, it is characterized in that: described rising head body comprises upper body (2) and lower body (4), and the tapering α 1 of upper body (2) is less than the tapering α 3 of lower body (4), the top of described upper body (2) is provided with the pressure cone tank (1) of indent, rising head seat (9) is for being more than or equal to the spherical shell shape of lower body (4) base diameter, the left side of lower body (4) and rising head seat (9) or right side are provided with overhanging riser neck (7), the front downside of lower body (4) or rear downside are provided with sprue channel open (6).

2. the tapered rising head of casting high pressure moulding according to claim 1, is characterized in that: the height H 1 of described upper body (2) is more than or equal to the height H 2 of lower body (4).

3. the tapered rising head of casting high pressure moulding according to claim 1, it is characterized in that: between described upper body (2) and lower body (4), be provided with the intermediate body member (3) of at least one transition, and the tapering α 2 of intermediate body member (3) is greater than the tapering α 1 of upper body (2) and is less than the tapering α 3 of lower body (4).

4. according to the tapered rising head of casting high pressure moulding one of claims 1 to 3 Suo Shu, it is characterized in that: the tapering α 1 of described upper body (2) is at 20～40 °, and the tapering α 3 of lower body (4) is at 75～89 °.

5. according to the tapered rising head of casting high pressure moulding one of claims 1 to 3 Suo Shu, it is characterized in that: the diameter D2 of described upper body (2) end face is at 30-40mm, the angle beta of pressure cone tank (1) at 50-80 °, notch diameter D1 at 20-30mm, lower body (4) base diameter D3 is at 100-130mm, the spherical radius R of rising head seat (9) is at 50-65mm, and top box height H is at 130-165mm.

6. the tapered rising head of casting high pressure moulding according to claim 1, is characterized in that: described riser neck (7) is by the transition cambered surface (5) with lower body (4) conical surface surface blending and transition face (8) formation tangent with rising head seat (9) sphere.

7. according to the tapered rising head of casting high pressure moulding described in claim 1 or 6, it is characterized in that: the distance B between described riser neck end face and rising head body central axis is at 60-85mm.