CN201275595Y

CN201275595Y - Casting pattern of heat-resisting steel elongated blind pipe

Info

Publication number: CN201275595Y
Application number: CNU2008201725840U
Authority: CN
Inventors: 孙宏飞; 王灿明; 渠智彦
Original assignee: SHANDONG ENGINEERING RESEARCH CENTER FOR WEAR OF MATERIAL; Shandong University of Science and Technology
Current assignee: SHANDONG ENGINEERING RESEARCH CENTER FOR WEAR OF MATERIAL; Shandong University of Science and Technology
Priority date: 2008-10-14
Filing date: 2008-10-14
Publication date: 2009-07-22
Anticipated expiration: 2018-10-14

Abstract

The utility model discloses a casting mold for a heat-resisting steel slender blind pipe. The casting mold is mainly characterized in that a composite core rod is installed inside a resin-sand shuttering, a vent hole is formed at the top of the resin-sand shuttering, a bottom pouring channel is formed at the bottom of the resin-sand shuttering, and the height of a pouring basin of the pouring channel is larger than that of the resin-sand shuttering. By adopting the composite core rod to make a sand core, the casting mold has the advantages that the manufacturing technique is simple, the casting mold is not easy to deform, and the bottom pouring channel ensures no eccentricity of the sand core.

Description

A kind of casting pattern of heat-resistant steel slime blind-tube

Technical field

The utility model relates to casting field, particularly a kind of casting pattern of heat-resistant steel slime blind-tube, for example casting pattern of thermocouple blind hole sleeve pipe.

Background technology

The structure of the casting pattern of heat-resistant steel slime blind-tube is to comprise sandbox, sand mo(u)ld shell and teeming formula running channel at present, the sand mo(u)ld shell is mid-goes into water-soluble core, its weak point is: water-soluble core complex manufacturing technology, must do water-proofing treatment before being assembled into cured mould, dissolved away during in order to avoid dewax, core scaling loss distortion during roasting sand mo(u)ld shell, strength and stiffness reduce; Owing to adopt the cast of teeming formula running channel, core is eccentric easily and scrap.

Therefore studying a kind of new casting pattern can cast out length 〉=300mm, and diameter is than 〉=30, and the blind pipe of diameter 〉=6mm just becomes and produces the problem that this series products needs to be resolved hurrily.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of casting pattern of heat-resistant steel slime blind-tube is provided.

For achieving the above object, casting pattern structure of the present utility model is: it comprises sandbox and sand mo(u)ld shell, it is characterized in that:

(1) in the sand mo(u)ld shell of making by resin, inserts a compound arbor, the structure of compound arbor is: the resin sand that is coated with one deck 1～2mm thickness at one section diameter less than the steel tube surface of blind pipe diameter, the resin sand top layer is coated with the casting heat-resistant steel coating commonly used of one deck 0.2～0.5mm thickness, and the external diameter behind steel pipe coated with resins sand and the coating equals the internal diameter of blind pipe;

(2) running channel in the sandbox is the bottom filling running channel, be made up of ingate, cross gate and sprue, and the height of cup is greater than the overhead height of resin sand formwork;

(3) bottom of steel pipe sealing is filled with dry sand in steel pipe;

(4) leave venthole at the top of resin sand formwork.

Good effect of the present utility model is:

1. casting pattern of the present utility model has solved the one-shaping technique problem of slime blind-tube, can be used for directly casting internal diameter 〉=6mm, and length is the blind pipe of 300～400mm.

2, owing to adopt compound arbor, be not easy during cast to damage distortion, and manufacture craft is simple.

3, owing to adopt the resin sand formwork, make the fabulous and very easily sand removal of cast back resin sand collapsibility, sand easily takes out in the blind pipe, and the productivity ratio height is compared with the manufacture craft of water-soluble core complexity, and casting method of the present utility model is succinct, is easy to realize.

4, owing to adopt bottom pouring type pouring, guaranteed that core is not eccentric.

Description of drawings

Fig. 1 is the schematic diagram of the compound arbor of the utility model;

Fig. 2 is the schematic diagram of the utility model casting pattern.

Among the figure: the compound arbor of 1-, 2-resin sand formwork, 3-venthole, 4-rising pouring ingate, 5-cross gate, 6-sprue, 7-fine steel tube, 8-resin sand, 9-coating, 10-aperture, 11-sandbox.

The specific embodiment

Further specify the structure and the preparation method of the utility model casting pattern below with reference to Fig. 1 and Fig. 2.

1, makes compound arbor 1 according to the physical dimension of slime blind-tube.Intercepting one joint fine steel tube 7, the blind pipe diameter 1.2-2.5mm that fine steel tube 7 diameters are made less than needs, fine steel tube 7 length equal the clamping length sum of blind hole length and sand mo(u)ld shell 2; On fine steel tube 7 walls, be drilled with aperture 10, aperture, pitch-row, arrangement mode are not strict with, the boring back is at the resin sand 8 of fine steel tube 7 surface-coated 1～2mm thickness, used resin sand 8 usefulness intensity height, the sand in coating phenolic resin that gas forming amount is low, resin sand 8 skins evenly apply the casting heat-resistant steel coating 9 commonly used of 0.2～0.5mm thickness again, compound arbor 1 external diameter of making equals the blind pipe internal diameter, dries stand-by.

2, the metal die of sand mo(u)ld shell 2 is made in design according to blind pipe appearance and size, and with metal die making resin sand sand mo(u)ld shell 2, leaves pore 3 at an end of sand sand mo(u)ld shell 2 tops, the compound arbor 1 of clamping.

3, make the metal die of running channel according to the size design of blind pipe appearance and size and resin sand formwork 2, and make rising pouring ingate 4, cross gate 5 and sprue 6 with metal die.

4, compound arbor 1 is inserted in the resin sand formwork 2 and and running channel group type, put into sandbox 11 moulding together and get final product.

Claims

1, a kind of casting pattern of heat-resistant steel slime blind-tube, it comprises sandbox and sand mo(u)ld shell, it is characterized in that:

In the sand mo(u)ld shell of making by resin, insert a compound arbor, the structure of compound arbor is: the resin sand that is coated with one deck 1～2mm thickness at one section diameter less than the steel tube surface of blind pipe diameter, the resin sand top layer is coated with the casting heat-resistant steel coating commonly used of one deck 0.2～0.5mm thickness, and the external diameter behind steel pipe coated with resins sand and the coating equals the internal diameter of blind pipe;

Running channel in the sandbox is the bottom filling running channel, be made up of ingate, cross gate and sprue, and the height of cup is greater than the overhead height of resin sand formwork;

The bottom sealing of steel pipe is filled with dry sand in steel pipe;

Venthole is left at top at the resin sand formwork.