CN1851060B - Hollow part electroforming furrow filling method - Google Patents
Hollow part electroforming furrow filling method Download PDFInfo
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- CN1851060B CN1851060B CN2006100394085A CN200610039408A CN1851060B CN 1851060 B CN1851060 B CN 1851060B CN 2006100394085 A CN2006100394085 A CN 2006100394085A CN 200610039408 A CN200610039408 A CN 200610039408A CN 1851060 B CN1851060 B CN 1851060B
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- groove
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- hollow part
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Abstract
The filling method of the groove during the electroforming of the hollow part belongs to the domain of the electroform process. The filling of the grove is performed twice layers respectively: the first layer chooses the diffluent plastic to be the bottom layer (3); the second layer adopts the homogeneity plastic mixing with the certain percent of the metal powder, the layer is served as the electric layer (4), it has the good capability of conducting and engine machining. If the hole passing the liquid used for washing is obligated on the bottom of the first material, the filling material after the electroforming can be dissolved to wipe off better. The invention is fit for the mallow parts, especially, it is fit for the thin route to fill the grove before the electroforming and wipe off the filling material after the electroforming. The process is easy. The period of filling and pulling off the model is short. The core model produced by the invention has many merits such as the low size precision, the good electric ability and without the remaining filling material after the pulling off the model.
Description
Technical field
The fill method of groove belongs to the electroforming manufacture field in the hollow part electrotyping process of the present invention.
Background technology
Along with modern industry and development of science and technology, many special type, precision metallic parts that are difficult to shape with traditional method have appearred, have the hollow part of complex passages or cavity as rocket combustion chamber etc.At present, the shaping of above-mentioned hollow part is often carried out in two steps: at first with traditional diamond-making technique cavity or channel part are processed into the groove shape of opening, produce the part shell by galvanoplastics then.Before implementing electroforming, important step be with certain material filling groove connecting trench wall, and the shape and size of assurance member cavity or passage.The material requirements of filling groove has following characteristic: be insoluble to electroforming solution, shrinking percentage is low, and is indeformable and can keep certain intensity under the electroforming temperature; Material or surface have good electrical conductivity, to guarantee the smooth deposition of metal; After finishing, electroforming can remove by methods such as fusing or dissolvings.Satisfying the above common used material that requires has the mixture of low melting point alloy, paraffin, plastics etc.Above material respectively has relative merits, the good conductivity of low melting point alloy, and shrinking percentage is low, but some one-tenth branch wherein becomes fragile electroformed layer, and be difficult to remove clean; The paraffin low price be the material of present more employing, but its machining property is bad; The plastic working better performances easily be dissolved in organic solvent, but often dissolution rate is low.
Non-conducting material such as paraffin and plastics must the conduction processing before electroforming, and method commonly used is with the chemical reduction method metal-coated membrane, applies and be coated with electric conduction paint with graphite or metal-powder.Chemical reduction method does not influence precision basically, the demoulding easily, but technology is complicated.Though it is simple to be coated with the electric conduction paint method, glue-line is too thick, and the distortion of core dimensional precision is bigger, is unsuitable for the electrotyping process of precision component.The method that applies graphite or metal powder only is applicable to the material that can adhere to these powder, requires carefully handled, otherwise uncoated place does not just have metal deposition, makes electroformed layer produce defectives such as pit.The film conductivity of greying gained is low, though the electroconductibility of metal powder coating improves, often the dimensional precision distortion is serious.
Summary of the invention
The objective of the invention is deficiency, the fill method that a kind of cost is low, easy and simple to handle, precision is high is provided at channel filling method in traditional hollow part electrotyping process.
The fill method of groove is characterized in that comprising the following steps: in a kind of hollow part electrotyping process
(1), be raw material with diffluent plastics, go out the first layer material by groove bottom shape curing molding;
(2), fill the first layer material as bottom (3) in groove (2) bottom surface of electroforming part;
(3), get the raw material of the first step, the metal powder of sneaking into 30%-70% forms second layer material, is filled in second layer material above the bottom (3) and solidifies, as conductive layer (4);
(4) by the excess stock of mechanical workout removal conductive layer (4), guarantee dimensional precision and surfaceness;
(5), implement electroforming;
(6), after electroforming finishes, all weighting materials are dissolved demoulding from the groove that has been covered by electroforming.
If in moulding process, form a passage that runs through front and back in its bottom, as the liquid-through hole of bottom at described the first layer material; In the liquid-through hole of reserving, wash away solvent during demoulding or use auxiliary means easier demoulding.
The penetrating via of the first layer material and bottom thereof form a variety of methods: can become jelly with above-mentioned diffluent plastics and solvent thereof, relend and help the auxiliary means curing molding, the passage of the first layer material bottom can be by the boss of auxiliary means bottom, or by the certain snappiness that places the auxiliary means bottom and be insoluble to that the circular section silk thread of the used organic solvent of this technology forms.
The penetrating via of the first layer material and bottom thereof also can be by injection moulding, compression molding.
As seen, characteristics of the present invention are: 1, select for use the plastics that do not contain additive to make bottom filling material, be easy to dissolving in solvent; 2, reserve logical liquid bath/hole at bottom, can be to wherein washing away solvent, energy is accelerate dissolution speed significantly; 3, conductive layer adopts the plastics that mix certain proportion metal micropowder, and conductivity and machining property are good.Therefore, adopt the core of above-mentioned fill method manufacturing, can fully guarantee the dimensional precision and the surfaceness of core, be applicable to that the precise electrotyping of hollow part is shaped.Utilize the mandrel surface smooth finish and the dimensional precision height of manufacturing of the present invention, good conductivity can residual packing in the part passage after the demoulding.
Description of drawings
Fig. 1 is a trench fill process synoptic diagram.Wherein figure (a) is the sectional schematic diagram of groove before filling; Figure (b) is before implementing electroforming, the sectional schematic diagram of trench fill; Figure (c) is the structural representation that electroforming finishes the back trench fill; Figure (d) is after removing weighting material, the local section synoptic diagram of the final hollow part that is shaped.
Fig. 2 is the preformed auxiliary means synoptic diagram of primer.Wherein figure (e) is the preliminary shaping synoptic diagram of semicircle liquid-through hole; Figure (f) is the preliminary shaping synoptic diagram of circular liquid-through hole.
Label title among Fig. 1: 1, core matrix, 2, groove, 3, bottom, 4, conductive layer, 5, liquid-through hole, 6, electroformed layer, 7, cavity.
Label title among Fig. 2: 8, top board, 9, preformed primer, 10, side plate, 11, base plate, 12, wire.
Embodiment
Implement the present invention---the operating process of " fill method of groove in the hollow part electrotyping process ", as shown in Figure 1, it is two-layer to be characterized in that the interior weighting material of groove is divided into, and promptly bottom (3) and conductive layer (4) have preformed liquid-through hole (5) at bottom.
Shown in Figure 2 is the preformed auxiliary means synoptic diagram of primer, by the combination of base plate (11), side plate (10) and top board (8), form with part on the identical structure of groove (2), be used for the shaping in advance of primer.Be characterized in semicircle or nearly semicircular projection being arranged, be used for the shaping in advance of liquid-through hole (5) in base plate (11) inboard.Above-mentioned projection also can replace with the material of the circular or rotund round line that is bonded in base plate (11) bottom.The circle wire material requires certain snappiness to be arranged and be insoluble to organic solvent used in this technology, can select nylon wire, iron wire, copper wire etc. for use.
Below in conjunction with Fig. 1 and Fig. 2 method of the present invention is described, implementation process is passed through following step successively:
1, packing material selects for use dissolution rate not contain the plastics (as PG33) and the formed jelly of solvent thereof of additive faster;
2. in the groove of auxiliary means shown in Figure 2, fill up primer and be dissolved in the formed jelly of solvent, compress side plate (10) and top board (8), take out standby after the completely solidified;
3. with reference to figure 1 (a), electroforming core (1) and groove (2) thereof are carried out oil removing, cleaning and dry back standby; Get the described jelly of the first step a little, standby after solvent further dilutes;
4. with reference to figure 1 (b), apply described jelly of second step of one deck, the first step preformed bottom filling material of institute (9) is pressed into groove (2) in trench bottom surfaces and side;
5., repeat above-mentioned steps, until all trench fill are finished if on the core (1) a plurality of grooves (2) are arranged;
6. repair the slit of primer and groove (2) sidewall, solidify the back and form bottom (3);
7. get the described jelly of the first step a little, add 30%～70% metal powder, become pasty state with solvent, standby, wherein metal powder can be copper powder, nickel powder etc.;
8. in the remaining space of all grooves (2), apply described pasty mixture of the 7th step, and mandrel surface is covered fully, place and solidify;
9. by the method for mechanical workout or rubbing down, remove unnecessary weighting material; After polishing, obtain meeting the electroforming core of dimension precision requirement and surfaceness requirement;
10. behind the electroforming end of processing, lay down the shielding that links to each other with core, supporting electrode etc., through clean, after the drying, immersing solvent carries out the dissolving demoulding of weighting material;
11. when dissolving the demoulding, can utilize coming off of ultrasonic promotion dissolving and metal powder in the 10th step; For more elongated, complex-shaped groove, solvent can be washed away by logical liquid bath/hole (5) of reserving, to promote coming off of dissolving and metal powder.
Claims (6)
1. the fill method of groove in the hollow part electrotyping process is characterized in that comprising the following steps:
(1), be raw material with diffluent plastics, go out the first layer material by groove bottom shape curing molding;
(2), fill the first layer material as bottom (3) in groove (2) bottom surface of electroforming part;
(3), get the raw material of the first step, the metal powder of sneaking into 30%-70% forms second layer material, second layer material is filled in above the bottom (3), and solidifies, as conductive layer (4);
(4), remove the excess stock of conductive layer (4), guarantee dimensional precision and surfaceness by mechanical workout;
(5), implement electroforming;
(6), after electroforming finishes, all weighting materials are dissolved demoulding from the groove that has been covered by electroforming.
2. the fill method of groove in the hollow part electrotyping process according to claim 1 is characterized in that: described the first layer material forms a passage that runs through front and back in its bottom, as the liquid-through hole (5) of bottom (3) in moulding process; In the liquid-through hole of reserving (5), wash away solvent during demoulding or use auxiliary means, above-mentioned weighting material is dissolved the demoulding from the groove (2) that has been covered by electroformed layer.
3. the fill method of groove in the hollow part electrotyping process according to claim 2, it is characterized in that: the penetrating via of described the first layer material and bottom thereof is to help the auxiliary means curing molding by becoming jelly with diffluent plastics and solvent thereof, relending.
4. the fill method of groove in the hollow part electrotyping process according to claim 3 is characterized in that: described passage is to form by the boss that places the auxiliary means bottom.
5. the fill method of groove in the hollow part electrotyping process according to claim 3 is characterized in that: described passage is to form by the circular section silk thread (12) that has snappiness and be insoluble to the used organic solvent of this technology that places auxiliary means bottom.
6. the fill method of groove in the hollow part electrotyping process according to claim 1 and 2 is characterized in that: the penetrating via of described the first layer material and bottom thereof is by injection moulding, compression molding method curing molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100394085A CN1851060B (en) | 2006-04-10 | 2006-04-10 | Hollow part electroforming furrow filling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100394085A CN1851060B (en) | 2006-04-10 | 2006-04-10 | Hollow part electroforming furrow filling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1851060A CN1851060A (en) | 2006-10-25 |
| CN1851060B true CN1851060B (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100394085A Expired - Fee Related CN1851060B (en) | 2006-04-10 | 2006-04-10 | Hollow part electroforming furrow filling method |
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| Country | Link |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710733A (en) * | 2013-12-26 | 2014-04-09 | 南京航空航天大学 | Processing method of U-shaped through channels |
| CN104625655A (en) * | 2015-02-14 | 2015-05-20 | 杨光华 | Manufacturing method for curved hydraulic channel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1009340B (en) * | 1986-03-24 | 1990-08-29 | 三菱油化株式会社 | Production method of composite oxide catalysts |
| CN1123039A (en) * | 1994-02-12 | 1996-05-22 | 谢帕斯印刷技术有限公司 | Process for producing a base mould for electrolycally producing seamless rotary screen printing stencils, in particular of nickel |
| EP0646338B1 (en) * | 1993-10-02 | 1999-04-07 | JOSEF Eberle GmbH + Co. KG. | Hollow body made of precious metal or alloy of precious metals, used as jewel or jewellery item |
| EP1335042A3 (en) * | 2002-02-05 | 2004-08-25 | Obshestvo s Ogrannichennoj Otvetstvennostyu "Falkat" | Process for the manufacture of a heat exchanger |
-
2006
- 2006-04-10 CN CN2006100394085A patent/CN1851060B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1009340B (en) * | 1986-03-24 | 1990-08-29 | 三菱油化株式会社 | Production method of composite oxide catalysts |
| EP0646338B1 (en) * | 1993-10-02 | 1999-04-07 | JOSEF Eberle GmbH + Co. KG. | Hollow body made of precious metal or alloy of precious metals, used as jewel or jewellery item |
| CN1123039A (en) * | 1994-02-12 | 1996-05-22 | 谢帕斯印刷技术有限公司 | Process for producing a base mould for electrolycally producing seamless rotary screen printing stencils, in particular of nickel |
| EP1335042A3 (en) * | 2002-02-05 | 2004-08-25 | Obshestvo s Ogrannichennoj Otvetstvennostyu "Falkat" | Process for the manufacture of a heat exchanger |
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| Publication number | Publication date |
|---|---|
| CN1851060A (en) | 2006-10-25 |
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Granted publication date: 20110504 |