CN2486234Y

CN2486234Y - Pipe core for producing long and thin deep hole pipe

Info

Publication number: CN2486234Y
Application number: CN 01240460
Authority: CN
Inventors: 阎惠来
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-29
Filing date: 2001-05-29
Publication date: 2002-04-17
Anticipated expiration: 2011-05-29

Abstract

The utility model relates to a tube core for manufacturing tubes with slender deep hole and comprises a core rod 2 which is a hollow tube with open ends, vent 3 on the tube wall and a core shell 1 arranged outside the core rod 2. The utility model has the advantages of wide range of application, low production cost and possibility for repeated use.

Description

A kind of tube core of making elongated deep hole pipe

The utility model relates to a kind of tube core, especially a kind of tube core of making elongated deep hole pipe.

In the prior art, the casting technique of elongated deep hole pipe of producing a general elongated deep hole pipe and an end and be blind head is very high to specification requirement, its main casting technique is to make tube core earlier, places mould to cast this tube core again, forms elongated deep hole pipe.The tube core of producing this elongated deep hole pipe generally adopts ceramic material to make.Utilize this tube core to make elongated deep hole pipe and have following shortcoming:

1, end product quality is poor.Because ceramic die is solid, airtight, so in casting process, make the elongated deep hole tube wall after the moulding pore occur easily; And this tube core skin is a pottery, and when casting is difficult to fix with jig in mould, causes the elongated deep hole pipe endoporus disalignment after the moulding easily, causes withstand voltage, the bending strength of the pipe behind the finished product to reduce, and product quality is difficult to guarantee that percent defective is higher;

2, range of application is little.The extreme length that adopts the elongated deep hole pipe of ceramic die manufacturing only is about 10 times of pipe diameter of bore;

3, production cost height.The manufacturing cost of ceramic die itself is just high, and this tube core can not reuse, and after elongated deep hole pipe was made, tube core was promptly scrapped, and causes production cost to increase.

The purpose of this utility model provides a kind of applied range, low, the reusable tube core of production cost.

The technical solution of the utility model is: this tube core comprises arbor 2, and described arbor 2 is a hollow pipe, the equal open-ended in two ends, and tube wall is provided with air-vent 3; These arbor 2 skins are provided with core shell 1.

Above-mentioned arbor 2 cross sections can be circle, ellipse, square or triangle etc., but are good with circle.

Above-mentioned core shell 1 can be test tube shape cylindric or end sealing.

Above-mentioned arbor 2 can be stretched in outside the core shell 1.

Above-mentioned core shell 1 can be made of the composite material of resin, quartz sand and adhesive.

The accompanying drawing drawing is described as follows:

Fig. 1 is for making the tube core structure schematic diagram of elongated deep hole pipe;

Fig. 2 is for making the tube core structure schematic diagram that an end is the elongated deep hole pipe of blind head.

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

Referring to Fig. 1, the tube core of making elongated deep hole pipe comprises arbor 2, and this arbor 2 is a hollow pipe, and two ends are opening, and tube wall is provided with air-vent 3, and its outside is provided with cylinder formed core shell 1.Arbor 2 can make the permeability of tube core better if stretch in outside the core shell 1.The material of this core shell 1 can be made of in required ratio mixing resin, quartz sand and adhesive.When making tube core, at first perform two semi-cylindrical shaped moulds with this tube core die cavity, the mixture that resin, quartz sand and adhesive are formed is filled in two moulds then, mold cavity central authorities again are placed in one arbor 2, with the mixture compacting, subsequently another piece mould and its fastening are compressed, in arbor 2, feed carbon dioxide again, after this carbon dioxide and mixture reaction are solidified mixture the tube core taking-up is got final product.The technology of utilizing this tube core to make elongated deep hole pipe is: use earlier sandbox, pipe mould and the molding sand for preparing, produce two block castings and make sand mold, then the tube core of making is put into the wherein die cavity of a sand mold, tube core is fixed on the position, axis of sand mold die cavity with the core card, and with another piece sand mold and its fastening, the molten iron of in the sand mold die cavity, casting subsequently, high temperature liquid iron can make core shell 1 burning of tube core, adhesive between the quartz sand in the core shell 1 is incinerated powdery and is formed collapsibility, the tube outer wall of cast molding is shaken by external force slightly, quartz sand in its endoporus will defeated and dispersedly flow out, and then arbor 2 is extracted out, and manufacture craft is finished.

Referring to Fig. 2, the core shell 1 of tube core of making an end and be the elongated deep hole pipe of blind head is the test tube shape of end sealing, its manufacture craft and to make an end with it be that the technology of elongated deep hole pipe of blind head is basic identical with the technology of the tube core of making elongated deep hole pipe, just two half test tube shapes that mold cavities are end sealing; Used sand mold die cavity also is half a test tube shape of end sealing when making an end and be the elongated deep hole pipe of blind head.

The utlity model has following advantage:

1, quality of finished product good. Because arbor of the present utility model is provided with air-vent, so casting process The middle gas that produces can be discharged from air-vent, and the elongated deep hole tube wall after the moulding pore can not occur; The core shell of this tube core is made of resin, quartz sand and adhesive, uses easily jig when casting in mould Fixing, the elongated deep hole pipe endoporus after guarantor's moulding can be eccentric, makes the product quality height, and percent defective is low;

2, range of application is big. Because the utility model is provided with arbor, therefore adopt the thin of this tube core manufacturing Long deep hole pipe, its extreme length can be about 140 times of pipe diameter of bore;

3, production cost is low. It is low that the used material cost of the utility model itself compares pottery, and arbor And quartz sand is reusable, and production cost is reduced.

Claims

1, a kind of tube core comprises core body, it is characterized in that: described core body comprises arbor (2), and described arbor (2) is a hollow pipe, and two ends are opening, and tube wall is provided with air-vent (3); This arbor (2) outside is provided with core shell (1).

2, tube core as claimed in claim 1 is characterized in that: described arbor (2) cross section is circular, oval, square or triangle.

3, tube core as claimed in claim 1 or 2 is characterized in that: described core shell (1) is the test tube shape of the cylindric of opening or end sealing for two ends.

4, tube core as claimed in claim 3 is characterized in that: described arbor (2) is stretched in outside the core shell (1).

5, tube core as claimed in claim 4 is characterized in that: described core shell (1) is made of resin, quartz sand and adhesive.