CN103302244A

CN103302244A - Flange casting die

Info

Publication number: CN103302244A
Application number: CN2013102364084A
Authority: CN
Inventors: 马斌; 李正选; 谢淳; 祝青文; 孙银建; 朱勇; 宋波
Original assignee: Jiangsu Shenma Electric Power Co Ltd
Current assignee: Jiangsu Shenma Electric Power Co Ltd
Priority date: 2013-06-14
Filing date: 2013-06-14
Publication date: 2013-09-18
Anticipated expiration: 2033-06-14
Also published as: CN103302244B

Abstract

The invention discloses a flange casting die which comprises an outer die, an inner die and a bottom die, wherein the outer die, the inner die and the bottom die are combined together to form a flange-shaped cavity; iron cores for casting holes in a flange are arranged on the bottom die in the cavity; the inner cores are detachably connected onto the bottom die. According to the flange casting die, during the die opening, the flange and the inner cores can be taken down from the bottom die jointly; then during the demolding, the inner cores are independently taken down from the flange; and therefore, on the premise of guaranteeing the smoothness of the flange, the casting speed is increased, and the cost of human resources is reduced.

Description

The flange casting mould

Technical field

The present invention relates to a kind of apparatus for casting field, specifically a kind of flange casting mould.

Background technology

When flange was cast, flange was mainly cast with the mode of sand mold low pressure casting.The sand mold low pressure casting is to go out the core that product casting mold and lightening core are used with phenolic sand molding, type wall spray paint, location core, mould assembling post-drying also is transported on the air injection machine, method with low-pressure casting makes it moulding, during moulding, still need a large amount of personnel to participate in, after product had been cast, the non-finished surface of polishing made it to satisfy the roughness requirement.

Also having a kind of forging type is the metal pattern gravitational casting, and specifically the profile with flange adopts metal pattern to improve the surface smoothness of non-working position, adopts resin sand to make the core of core rod and the core at lightening core place.Core is whenever done a flange with regard to new system one cover core as disposable use.Pour molten metal into mold cavity behind location core, the matched moulds, the demoulding adopts some simple Mechanical Method bands firmly to strike product is deviate from from mould by hand.When producing flange, a large amount of personnel participate in moulding, cast, the demoulding.

Cast with above-mentioned mode, waste of manpower, the casting flow process is tediously long, inefficiency.

Summary of the invention

For the deficiencies in the prior art, the purpose of this invention is to provide a kind of flange casting mould, can make the casting efficient of flange higher, minimizing time and human cost.

For achieving the above object, the technology used in the present invention means are as follows: a kind of flange casting mould, comprise internal mold, external mold and bed die, and this internal mold, external mold and bed die are combined the cavity of formation and are the shape of this flange that will cast.Be provided be used to the inner core of casting the hole on the above-mentioned flange on the inherent above-mentioned bed die of this cavity, this inner core is connected on this bed die removably, so that this inner core and flange are thrown off from bed die together during die sinking.

Preferably, above-mentioned bed die relevant position, the correspondence position of both having boxed out on the flange is provided with groove, and above-mentioned inner core is inserted in the groove.

By above-mentioned setting, flange is when casting, arrange first inner core, both inner core was plugged on the bed die, then above-mentioned external mold, internal mold and bed die are carried out matched moulds, inject molten metal, carry out after a while die sinking, during die sinking the related inner core of flange is taken off from bed die together, then carry out the demoulding, to from external mold and internal mold, deviate from the flange of inner core, at last inner core be taken out from flange.

Preferably, above-mentioned inner core bottom is provided with screw, when with convenience inner core being taken out from flange, can inner core be screwed out with screw rod.

Preferably, above-mentioned inner core top does not contact the cavity inner wall of above-mentioned cast flange, and the weight that the hole that forms like this can guarantee to alleviate flange has guaranteed again the mechanical strength of flange simultaneously.

Preferably, above-mentioned inner core is from top to bottom by thin chap.When extracting inner core from flange, top arranging can more be conducive to extract smoothly this inner core.

Preferably, the wall thickness around the above-mentioned external mold equates.When cooling, make the external mold Homogeneouslly-radiating like this, can not produce local accumulation of heat, the time flange each several part heat radiation evenly.

Preferably, comprise tapping hole on the above-mentioned bed die, this tapping hole inner port inscribed circle diameter is greater than this tapping hole external port inscribed circle diameter.More easily pull off the solidification zone at tapping hole place when this structure makes die sinking, and when in mould, injecting molten metal, provide certain mouth of pipe stress.

Preferably, the material of above-mentioned inner core is metal, can use iron, and copper geometric ratio casting is with the high metal of melting point metal, and material cost is relatively low, and can be repeatedly used and do not damage.

Use flange casting mould of the present invention to cast flange continuously, do not need to reinvent sand mold or core, die sinking and the demoulding are simple, have guaranteed the fineness in flange surface and the hole, have reduced in a large number manpower and have greatly accelerated casting efficient simultaneously.

Description of drawings

Fig. 1 is the cutaway view of the embodiment of the invention;

Schematic diagram when Fig. 2 is embodiment of the invention taking-up iron core 5;

Fig. 3 is the top view of the flange 8 cast of the present invention;

Fig. 4 be among Fig. 3 flange 8 about the cutaway view of A-A` face;

Fig. 5 be among Fig. 3 flange 8 about the cutaway view of B-B` face.

The specific embodiment

As requested, will disclose the specific embodiment of the present invention here.Yet, should be understood that, disclosed embodiment only is exemplary of the present invention here, it can be presented as various forms.Therefore, here the detail that discloses is not considered to restrictive, and only be differently to use representational basis of the present invention as the basis of claim and as being used for instruction those skilled in the art in any appropriate mode of reality, comprise employing disclosed various features and in conjunction with the feature that may clearly not disclose here here.

As shown in Figure 1, be the cutaway view of the embodiment of the invention, flange casting device of the present invention comprises: external mold 1, and internal mold 2, bed die 3, external mold 1, internal mold 2 and bed die 3 are combined to form the cavity 4 of flange shape, are arranged at the inner core 5 that is plugged in the cavity 4 on the bed die 3.Inner core 5 is irony in the present embodiment, can make the lightening core smooth surface that casts out, and inner core 5 can be reused.Inner core 5 is more easily extracted when extracting inner core 5 with box lunch from flange from top to bottom by thin chap.Inner core 5 tops do not contact cavity 4 inwalls, and the lightening core that casts out so is not through hole, guarantee that flange has certain mechanical strength.Wherein on the bed die 3 on the companion flange position of lightening core be provided with groove 6, be used for grafting inner core 5.Wall thickness in the present embodiment around the external mold 1 equates, can guarantee flange each several part Homogeneouslly-radiating when flange cools off, and can not occur the situation of local accumulation of heat on the external mold 1.Also be provided with tapping hole 7 on the bed die 3, wherein tapping hole 7 inner port inscribed circle diameters are greater than tapping hole 7 external port inscribed circle diameters, when casting, can make tapping hole 7 places produce certain mouth of pipe pressure, when die sinking, more easily pull off the metal that solidify at tapping hole 7 places.

In the present embodiment, when flange is cast, inner core 5 is arranged on the bed die 3, then matched moulds is carried out in external mold 1, internal mold 2 and bed die 3 combinations, molten metal is injected in the cavity 4 by tapping hole 7, carry out after a while die sinking, the flange and the inner inner core 5 that both external mold 1, internal mold 2 be communicated with casting take off from bed die 3, then the demoulding was both taken off together with inner core 5 flange from external mold 1 and internal mold 2, at last inner core 5 is taken off from flange.

As shown in Figure 2, be the schematic diagram of inner core 5 when from flange 8, taking out, wherein flange 8 and inner core 5 to have been done to analyse and observe, screw 11 is arranged on inner core 5 bottoms.Be provided with retainer ring 10 and screw rod 9 on the inner core 5.When operation, flange 8 and retainer ring 10 is fixing, make inner core 5 bottoms arrive the distance of retainer ring 10 lower surfaces less than screw rod 9 bottoms to the distance of retainer ring 10 lower surfaces, and the distance of retainer ring 10 lower surfaces is arrived in screw 11 bottoms greater than screw rod 9 bottoms to the distance of retainer ring 10 lower surfaces, screw rod 9 is screwed in the screw 11, then continue rotary screw 9, because retainer ring 10 and flange 8 relative positions are fixed, screw rod 9 will slowly pull out iron core 5 from flange 8.

Such as Fig. 3-Fig. 5, wherein Fig. 3 is the top view of the flange 8 cast of the embodiment of the invention, Fig. 4 be among Fig. 3 flange 8 about the cutaway view of A-A` face, Fig. 5 be among Fig. 3 flange 8 about the cutaway view of B-B` face.Wherein 12 is the outer lightening core of flange 8, and 13 is the interior lightening core of flange 8.The lightening core that inner core 5 casts out in the embodiment of the invention is exactly interior lightening

core

13, and 12 of outer lightening cores are formed by the casting of the projection on the external mold 1.The setting of outer lightening core 12 and interior lightening core 13 makes flange 8 when guaranteeing mechanical strength, has greatly alleviated the weight of flange 8, has saved material.

The flange casting mould of above embodiment; can realize casting continuously; do not need to reinvent again and again sand mold, guaranteed the flange surface that casts out and the fineness in the hole, the problem that has solved the difficult demoulding of inner core or the difficult cleaning of core and can't reuse fast.Accelerate casting efficient, and reduced human cost.

Technology contents of the present invention and technical characterstic have disclosed as above; yet be appreciated that; under creative ideas of the present invention; those skilled in the art can make various changes and improve said structure and material; comprise here disclosing separately or the combination of claimed technical characterictic, comprise significantly other combination of these features.These distortion and/or combination all fall in the technical field involved in the present invention, and fall into the protection domain of claim of the present invention.

Claims

1. flange casting mould, comprise internal mold, external mold and bed die, the cavity that described internal mold, external mold and bed die are combined formation is the shape of described flange, be provided with inner core for the hole that casts on the described flange on the inherent described bed die of described cavity, it is characterized in that: described inner core is connected on the bed die removably, during die sinking, described inner core and described flange are thrown off with described bed die together.

2. flange casting mould as claimed in claim 1, it is characterized in that: described bed die relevant position is provided with groove, and described inner core is inserted in the described groove.

3. flange casting mould as claimed in claim 1 is characterized in that: be provided with screw bottom the described inner core.

4. flange casting mould as claimed in claim 1, it is characterized in that: described inner core top does not contact the inwall of described cavity.

5. flange casting mould as claimed in claim 1, it is characterized in that: described inner core is from top to bottom by thin chap.

6. flange casting mould as claimed in claim 1 is characterized in that: the wall thickness around the described external mold equates.

7. flange casting mould as claimed in claim 1, it is characterized in that: comprise tapping hole on the described bed die, described tapping hole inner port inscribed circle diameter is greater than described tapping hole external port inscribed circle diameter.

8. flange casting mould as claimed in claim 1, it is characterized in that: described inner core is metal material.