CN1008699B - The metal flow passage model of used in lost wax casting - Google Patents
The metal flow passage model of used in lost wax castingInfo
- Publication number
- CN1008699B CN1008699B CN 85107885 CN85107885A CN1008699B CN 1008699 B CN1008699 B CN 1008699B CN 85107885 CN85107885 CN 85107885 CN 85107885 A CN85107885 A CN 85107885A CN 1008699 B CN1008699 B CN 1008699B
- Authority
- CN
- China
- Prior art keywords
- model
- flow passage
- metal flow
- paraffin
- runner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
The present invention is the improvement of lost-wax casting method and relevant device.A plurality of paraffin models of casting object of waiting are connected with the paraffin coating of paraffin import and metal flow passage model, form the model that the string shape is arranged.String shape model coating system shell material makes shell.With eddy-current heating metal flow passage model, make its top layer waxing fusing, the metal flow passage model is taken out from string shape model easily, stay the runner of casting molten metal.Cast the object that needs.Adopt the metal flow passage model can save the time of the paraffin consumption and the shortening fusing runner paraffin of runner.
Description
The present invention relates to a kind of method and device, particularly improve the method and the device of lost-wax casting.
Old wax-loss casting process adopts the metal prototype mould, and in order to make a plurality of paraffin models repeatedly, these paraffin models are exactly the object that needs casting.Paraffin model interconnects by paraffin import and paraffin runner, arranges the bunchiness shape.On the paraffin model of string shape, apply one deck or which floor refractory material, or model is immersed in the slip, make it to be coated on outside the paraffin model.Apply the mould material then through solidifying or hardening, form the shell of wax-pattern and runner.Remove wax-pattern and runner are molten again, form fully in empty shell model.Pour into melt metal in the shell model, just can cast the object that needs.
Many suggestions were once arranged to reduce the paraffin that runner is used aspect process modification.Very easy understanding is in casting process, and runner need be used a considerable amount of paraffin, and when removing the paraffin of paraffin runner and paraffin import, not only consumes a large amount of heat energy, also need expend 6～10 minutes or the more melting time.Thereby the shortening time is the ten minutes needs with reducing energy consumption.
Moreover paraffin runner and paraffin import are lost-wax casting " weak links ", when paraffin is removed in heating, because the paraffin runner expands, can make model produce fracture, and this must be avoided certainly.
Advance most,, run into such problem, promptly in some cases, placed restrictions on the production of automation mode just because of the weakness that the paraffin runner is had.Because the undercapacity of paraffin runner is restricted the speed of gyration of string shape model in the refractory material.
We know, United States Patent (USP) 3,177, and 537 wax-loss casting process is used the metal flow passage model instead without the paraffin runner.On the metal flow passage mold surface, be coated with the thin paraffin of last layer, it can be connected with paraffin model.Employing metal flow passage model has reduced the consumption of paraffin, and the runner model also can be used very soon again, all corresponding minimizing of the time of consumption and energy.According to the explanation of above-mentioned United States Patent (USP), in runner, pour into Heat Conduction Material (for example oil), can earlier from string shape model, take out the metal flow passage model that scribbles thin wax layer.After conduction oil made thin wax coating fusing, the metal flow passage model just can skid off from string shape model at an easy rate.Then, when string shape model was removed the paraffin of remaining import and model by normal mode, the metal flow passage model can be used for making new model simultaneously.
But using deep fat or other heat-conducting medium also is trouble and time-consuming very, and the oil heating separately of still needing, pour in the runner after, also to from runner, topple over out again.
The method that the purpose of this invention is to provide a kind of new heating of metal runner model was both simpler and quick than known method.
Another object of the present invention is to provide a cover device for finishing said method.
The present invention selects tubular metal runner model for use, heat with induction coil, induction coil is laid near the metal flow passage model, when induction coil is worked, the metal flow passage model is heated rapidly, paraffin layer fusing, metal flow passage model just can be taken out from string shape model and very fast, easily, very neatly again for use.
The invention provides the method that is specifically designed to lost-wax casting, may further comprise the steps: the paraffin model with waiting to cast object, be connected by the paraffin coating of paraffin import with the metal flow passage model, form the model that the string shape links to each other; String shape model brushing pattern-making material makes the model shell; Metal flow passage model with in the chlamydate string shape model of induction coil heating tape takes out the metal flow passage model from model.
The present invention also specialized designs be used for a cover device of lost-wax casting, device comprises the supporting arrangement of supporting strap shell string shape model, string shape model is interconnected by the metal flow passage model of paraffin model, paraffin import and paraffine layer and forms, and string shape model scribbles the coating of pattern-making material.Device also comprises near the induction heating circle of metal flow passage model placement and the operating means of eddy-current heating, makes the paraffin layer fusion of metal flow passage model surface in the string shape model.In the most preferred embodiment of the present invention, the metal flow passage model selects for use aluminum or aluminum alloy to make.Because having, aluminum or aluminum alloy meets characteristic of the presently claimed invention.
Induction heating apparatus can adopt common induction coil, preferably uses high frequency, and promptly frequency is the scope of 60-10000 hertz.Induction coil is wanted as close as possible tubular metal runner model, to increase coupling efficiency.Tubular metal runner model will be done very thinly, is convenient to be rapidly heated.Rule of thumb use said method, from model, take out the metal flow passage model and can not surpass for ten seconds.
The device that the present invention selects for use, the typical thickness of metal flow passage model are 1～3.8 millimeter (40/1000ths～150 inches).As mentioned above, the thickness of metal flow passage model is thinner better, but because mechanical stress and external heat produce the result of distortion, becomes the limiting factor of thickness thinning.The wax layer also requires very thin, and its scope is 0.13～1.27 millimeter (0.005～0.05 inch).
The present invention is described in detail as follows with reference to accompanying drawing:
Fig. 1 is the cutaway view of string shape model.
Fig. 2 coats system shell material cutaway view afterwards for string shape model.
Fig. 3 is a cutaway view of placing induction heating circle in the string shape model of band housing.
Fig. 4 is the cutaway view that takes out the metal flow passage model from string shape model.
Lost-wax casting method of the present invention is to be connected by the paraffin coating 3 of a plurality of paraffin models 1 with tubular metal runner model 5 very thin surface.Paraffin model 1 is connected with the paraffin layer 3 of metal flow passage model by paraffin import 7.Paraffin model 1 is exactly the object that needs casting.Tubular metal runner model 5 is selected thin wall cylindrical tubes for use, and an end is an openend 15, and other end sealing has two through holes 19 for casting gate end 13 at the casting gate end.Runner model 5 available copper, aluminium alloy or other material that is applicable to this technology are made.The model that paraffin model 1, runner model 5, import 7 composition string shapes connect as shown in Figure 1.
String shape model is dipped in the thin pulp, makes shell 17 with the system shell material, as shown in Figure 2.Making shell 17 with the system shell material can immerse string shape model in the potter's clay thin pulp, brushing refractory particle on the potter's clay slurry face of model again, and being coated with refractory particle can or immerse in the liquid tank with vibratory sieve.Soak and sieve and to carry out repeatedly meeting the requirements of thickness up to shell 17.
After shell 17 is stiff, the string shape model 15 of banding pattern shell 17 is propped, wherein packed into induction coil 21 as shown in Figure 3 with suitable method.String shape model 15 can be moved with steel rod 23.15 time-outs of string shape model, the longitudinal axis of its tubular metal runner model will overlap with the longitudinal axis of induction coil 21.The closed gauge tap 31 that is connected with power supply makes the electric current induction coil 31 of flowing through, and makes tubular metal runner model 5 eddy-current heating.After runner model 5 is heated, wax layer 3 fusing of its outer surface, longshore current road model flows down through casting gate 13 and flows out from shell mould 17, and metal flow passage model 5 skids off from shell 17 at an easy rate at this moment.As shown in Figure 4, shell is mentioned, the runner model just can take out again for using.Then the residue paraffin in the model is carried out dewaxing treatment, paraffin model and paraffin import are disposed from shell 17.Water the object that full melt metal just can be cast to be needed in the shell 17.
Adopt tubular metal runner model, and, provide the quick and easy method of runner model of from model, taking out, and make the runner model can be again for use with eddy-current heating runner model fusing wax layer.
The above device of being narrated of very easy understanding, its purpose is to illustrate principle of the present invention, can make the device with respective change on the basis that does not break away from the principle and scope of the present invention.
Claims (5)
1, a kind of method of lost-wax casting, it may further comprise the steps:
Prepare a metal flow passage model;
On the metal flow passage model surface, apply the paraffin coating;
Prepare a string shape model, it has a plurality of paraffin models of waiting to cast object, is connected with the golden runner model of above-mentioned coated paraffin by the paraffin import;
The surface of the paraffin layer of coated of string shape model and runner model be coated with duplicate shell material make outside shell;
Heating of metal runner model is elevated to its temperature to be enough to the temperature that makes the paraffin layer fusing, then, takes out the metal flow passage model, thereby forms a die cavity of being made up of shell and the runner of casting molten metal in die cavity;
It is characterized in that above-mentioned metal flow passage model is a hollow tubular, all coated paraffin layer and system shell material layer on the outer surface within it form the metal flow passage of tubulose after taking out the metal flow passage model, make that the motlten metal amount that is used for runner is minimum;
Above-mentioned metal flow passage model add the thermal recovery induction heating.
2, according to the method for claim 1, the step that it is characterized in that eddy-current heating metal flow passage model is the inside that an induction heating circle is placed on the metal flow passage model of coat.
3, according to the method for claim 1, it is characterized in that described metal flow passage model is columnar structured, one end opening, the other end are blind end and have a porus excretorius at least.
4,, it is characterized in that the power frequency by induction heating circle is between 60～10000 hertz according to the method for claim 3.
5, a kind of lost-wax casting device, comprise a metal flow passage model, the outer surface of above-mentioned metal flow passage model has the paraffin coating, have at least one to wait that the paraffin model of casting object links to each other with the paraffin coating of metal flow passage model outer surface by the paraffin import, outer surface at the metal flow passage model scribbles the system shell material, it is characterized in that above-mentioned metal flow passage model is a hollow tubular, has surfaces externally and internally, the sealing of the one end opening other end, blind end has a porus excretorius at least, and the inner surface of above-mentioned metal flow passage model also coated has paraffin layer and system shell material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107885 CN1008699B (en) | 1985-10-28 | 1985-10-28 | The metal flow passage model of used in lost wax casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107885 CN1008699B (en) | 1985-10-28 | 1985-10-28 | The metal flow passage model of used in lost wax casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107885A CN85107885A (en) | 1987-05-06 |
| CN1008699B true CN1008699B (en) | 1990-07-11 |
Family
ID=4795817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85107885 Expired CN1008699B (en) | 1985-10-28 | 1985-10-28 | The metal flow passage model of used in lost wax casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008699B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050786C (en) * | 1994-03-15 | 2000-03-29 | 伊藤南己 | Wax-like substance and molding method by using wax-like... |
| CN102441643B (en) * | 2011-12-08 | 2013-05-15 | 含山县清溪兴隆铸件厂 | Lost-foam casting production process combined with thermal spraying surface treatment |
| CN103506574B (en) * | 2012-06-27 | 2015-11-25 | 嘉善鑫海精密铸件有限公司 | The casting method of thin-walled Steel Casting in Investment Casting moulding by casting |
| CN102764853B (en) * | 2012-08-10 | 2013-12-18 | 邯郸慧桥复合材料科技有限公司 | Process for induction heating gasification expanded polystyrene (EPS) evaporative pattern casting |
| CN103722126A (en) * | 2013-12-27 | 2014-04-16 | 北京百慕航材高科技股份有限公司 | Demoulding method |
| DE102016202507B4 (en) * | 2016-02-18 | 2021-01-28 | Leica Biosystems Nussloch Gmbh | Inductive melting of paraffin by means of metallic bodies contained therein |
| CN108746496B (en) * | 2018-06-01 | 2020-04-07 | 中国航发北京航空材料研究院 | Preparation method of mold shell for investment casting |
-
1985
- 1985-10-28 CN CN 85107885 patent/CN1008699B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85107885A (en) | 1987-05-06 |
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