CN207267035U - A kind of small cylinder casting die - Google Patents

Abstract

A kind of small cylinder casting die, including outer mold and core box, outer mold includes mo(u)ld top half mould and mo(u)ld bottom half mould, mo(u)ld top half mould and mo(u)ld bottom half mould are radial direction parting, die joint is equipped between mo(u)ld top half mould and mo(u)ld bottom half mould, mo(u)ld top half mould and mo(u)ld bottom half mould are internally provided with overall inner cavity sand core, and the core box of inner cavity sand core is radial direction parting, and inner cavity sand core lower part passes through sand core on the downside of sand core location and installation.The small cylinder casting die of the utility model, using radial direction parting, identification division can directly be made on mould；Lumen portion uses integral sand core, the effective circularity for ensureing sand core；In the exterior increase sand core of mark offside, leakage hole is largely designed to position, the good positioning effect of inner cavity sand core.

Description

A kind of small cylinder casting die

Technical field

It the utility model is related to sand mold mould technical field, and in particular to a kind of semiclosed small cylinder casting mould in both ends Tool.

Background technology

General cylindrical parts casting, inner cavity are led directly to, and either one side has step mould axially or radial direction parting short Casting generally radially parting, the generally axial parting of long casting.Structure is relatively easy, and follow-up casting and molding, mould assembling etc. are all easy In operation.And when the small-sized casting of the cylindrical parts for running into complexity, this general mould parting method cannot be met the requirements, this kind of Casting both sides are all semi-closed states, and surrounding is non-porous, also have in unilateral outside and identify requirement, and inner cavity circularity is also stringent Requirement, therefore cause to make difficult.

Utility model content

In order to realize the making of the semiclosed small cylinder casting in both ends, the utility model provides a kind of small cylinder casting Mould.

Used technical solution is the utility model to achieve the above object：A kind of small cylinder casting die, including Outer mold and core box, outer mold include mo(u)ld top half mould 1 and mo(u)ld bottom half mould 2, and mo(u)ld top half mould 1 and mo(u)ld bottom half mould 2 are radial direction parting, on Die joint 3 is equipped between pattern tool 1 and mo(u)ld bottom half mould 2, mo(u)ld top half mould 1 and mo(u)ld bottom half mould 2 are internally provided with overall inner cavity sand core 6, the core box of inner cavity sand core 6 is radial direction parting, and sand core 6 lower part in inner cavity passes through 8 installation downside sand core 7 of sand core positioning.

Fit clearance between the inner cavity sand core 6 and downside sand core 7 is within 0.1mm.

The small cylinder casting die of the utility model, using radial direction parting, identification division can directly be done on mould Go out；Lumen portion uses integral sand core, the effective circularity for ensureing sand core；Exterior in mark offside increases sand core, leakage hole Major part is designed to position, the good positioning effect of inner cavity sand core.

Brief description of the drawings

Fig. 1 is the utility model small cylinder casting die structure chart.

Fig. 2 is the utility model small cylinder casting die top view.

Fig. 3 is the utility model small cylinder casting die sand core structure figure.

Fig. 4 is the utility model small cylinder casting die sand core face upwarding assumption diagram.

In figure：1st, mo(u)ld top half mould, 2, mo(u)ld bottom half mould, 3, die joint, 4, positioning core print, 5, mark, 6, inner cavity sand core, 7, under Side sand core, 8, sand core positioning.

Embodiment

The small cylinder casting die structure of the utility model as shown in Figs 1-4, including outer mold and core box, outer mold bag Include mo(u)ld top half mould 1 and mo(u)ld bottom half mould 2, mo(u)ld top half mould 1 and mo(u)ld bottom half mould 2 are radial direction parting, mo(u)ld top half mould 1 and mo(u)ld bottom half mould 2 it Between be equipped with die joint 3, mo(u)ld top half mould 1 and mo(u)ld bottom half mould 2 are internally provided with overall inner cavity sand core 6, and the core box of inner cavity sand core 6 is footpath To parting, sand core 6 lower part in inner cavity passes through 8 installation downside sand core 7 of sand core positioning.

Outer mold uses radial direction parting, and identification division can directly be made on mould, improves aesthetics.If using axis To parting, identification division, which needs to increase sand core, to be realized, but due to the objective reality of sand core and the seam of sand mold, no matter subsequently How grinding process, the appearance of casting entirety is all undesirable.

Lumen portion uses integral sand core, and sand core core box also uses radial direction parting, so can effectively ensure sand The circularity of core, and then the circularity that casting can be allowed to have obtained.

Increase sand core in the downside of casting, and inner cavity sand core is mutually combined.Since both sides are semi-closed states, surrounding without Hole, the positioning of such inner cavity sand core is highly difficult, can only be from the hollow part Design Orientation in both sides, and due to being small-sized casting, leaks Empty part is inherently smaller, needs to design docking site and positioning in this limited region, will certainly cause to position Very little, does not have the due effect of positioning, and then causes inner cavity sand core position deviation very big, or even mistake.In mark offside Outside increase sand core, so can largely be designed to leakage hole position, positioning, which increases, can solve the problem that the above is run into.

Two sand cores are needed using precoated sand heating coremaking mode, not only efficient, dimensional accuracy is good, but also are molded rule It is whole, it is often more important that case hardness is high, can obtain extraordinary locating effect.

The slightly degree positioned between sand core needs to increase 20 ° or so, and fit clearance will be ensured within 0.1mm.Big slightly degree side Just core is played, tire is rubbed in reduction, and small fit clearance may insure that inner cavity sand core positioning is more firm.But the fit clearance of top box core print will Somewhat larger, 0.5mm or so, prevents from causing top box due to sandbox location fit precision, sand core accuracy of form and position deviation itself etc. Cause to rub tire between the sand core of during mould assembling and inner cavity, and then carry out defect to casting belts.

Sand core core box material needs HT300, dimensionally stable, and can improve the service life, it is necessary to is handled by destressing.Inner cavity The positioning pin and positioning sleeve of sand core core box need to be made of high-quality mould steel, and quenching treatment, hardness need to reach HRC50 afterwards More than, it can so allow core box to keep the positioning accuracy of longer time, and then ensure the circularity of inner cavity sand core.When nowel sand mold is made After good, side sand core is first put down, puts inner cavity sand core again afterwards, to ensure that steadily, positioning is firm after being put into.Cylinder casting is tagged Side will be placed on top box, and the position of die joint will be placed on middle position on the lower, can so allow downside sand core shorter, sand core Between position portion from die joint more recently, when lower inner cavity sand core, be more convenient for watching, once under in place, and then What reduction was brought because core is played repeatedly rubs sand defect.Identification division on mould is clear, the surface roughness of lines side Reach more than Ra1.6, wedge angle position will handle round and smooth, and the fillet at minimum will reach more than R0.3, so both can ensure that casting The clear beauty of part mark, and casting and molding can be beneficial to.The applicability of this technology is wider, can tackle nearly all cylindrical parts casting The making of part mould.

Claims (2)

1. A kind of 1. small cylinder casting die, it is characterised in that：Including outer mold and core box, outer mold includes mo(u)ld top half mould（1） With mo(u)ld bottom half mould（2）, mo(u)ld top half mould（1）With mo(u)ld bottom half mould（2）For radial direction parting, mo(u)ld top half mould（1）With mo(u)ld bottom half mould（2）Between Equipped with die joint（3）, mo(u)ld top half mould（1）With mo(u)ld bottom half mould（2）It is internally provided with overall inner cavity sand core（6）, inner cavity sand core（6）'s Core box is radial direction parting, inner cavity sand core（6）Lower part is positioned by sand core（8）Installation downside sand core（7）.
2. A kind of 2. small cylinder casting die according to claim 1, it is characterised in that：The inner cavity sand core（6）With under Side sand core（7）Between fit clearance be 0.1mm within.