CN1145994A - Production process of special multi-ported copper pipe - Google Patents
Production process of special multi-ported copper pipe Download PDFInfo
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- CN1145994A CN1145994A CN 95115940 CN95115940A CN1145994A CN 1145994 A CN1145994 A CN 1145994A CN 95115940 CN95115940 CN 95115940 CN 95115940 A CN95115940 A CN 95115940A CN 1145994 A CN1145994 A CN 1145994A
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Abstract
The prodn process of special multi-ported copper pipe includes the steps the mother mould prodn based on the inner casvity shape of the pipe, the prodn of mould core with deposited fusible alloy, the copper plating on mould core electrochemically and the smelting out of mould core after opening cutting. The mould core may be also made of plastics or wax, which is treated before the copper plating through surface sensitizing, activating reducing and chemcial coppering. The multi-ported pipe produced based on the said process has smooth surface and good crack resistance and the present invention makes prodn of multi-ported pipe with complex shape easy.
Description
The invention relates to the manufacturing of a tube elements that connects the special shape that pipe uses.
Special multi-ported copper pipe is the accessory that is applied to the pipeline connection of refrigeration system such as refrigerator, air conditioner and hydraulic system, and the characteristics of this series products are, description is many, and big in batches, complex-shaped, difficulty of processing is big.
At present, this type of is taken over all is to utilize the good ductility of copper to continue to use traditional machining process manufacturing, and this is that suitable copper pipe is cut into certain size, then through the punching of bending, and the heating butt joint, extruding connects moulding, and operations such as the cleaning of annealing are finished.The adapter of so making, more or less have following shortcoming: weight is big; There is weld seam in the reducing transition position, the rosin joint dry joint that has internal stress and may occur; The weld seam transition is discontinuous, and the mechanical resistance resistance to spalling is poor, and fatigue strength and shockproof properties are low; Inner chamber is rough, has unnecessary copper pipe to insert, and pipeline is unobstructed inadequately; Speed of production is slow, the reject rate height.
The object of the present invention is to provide a kind of copper different production technologies that connect pipe that can overcome above-mentioned shortcoming more, this technology is can production weight light relatively, profile rule just, big, the no weld seam of mechanical resistance resistance to spalling, smooth, the stressless special multi-ported copper pipe of inner chamber.
Production process of special multi-ported copper pipe of the present invention, its step is as follows:
A, according to the cavity shape system master mold of taking over;
B, in master mold, inject core material, the molding core;
C, at the core rod electroless copper that powers on, reach the copper layer of desired thickness;
The molten core rod that goes gets special multi-ported copper pipe behind d, the otch.
The step b of this technology is to inject low melting alloy in master mold, the molding core.
The step b of this technology is an injected plastic in master mold, the molding core.
The step b of this technology is to inject wax in master mold, the molding core.
This technology wherein before the low melting alloy core rod powers on electroless copper, is deoiled as the surface and is polished this core rod.
This technology wherein before plastics core rod or cured core rod power on electroless copper, is made sensitization, activation, reduction processing and electroless copper to this core surface.
To the special multi-ported copper pipe of this explained hereafter gained, remake outer surface polishing, running-on shaping and surface passivation and handle.
This technology to wherein connecting pipe with what the alloy core rod made, before doing outer surface polishing, running-on shaping and surface passivation and handling, is carried out interior pickling more, removes the residual alloy mould core material of internal surface.
This technology to wherein connect pipe with what the plastics core rod made more, before doing outer surface polishing, the whole table of running-on and surface passivation, is heated and is burnt the internal surface residual plastic.
The copper abnormity of this explained hereafter connects pipe more, has abandoned traditional machining process in essence fully, has eliminated the aforementioned shortcoming that manufactured good reason mechanical processing method causes, this is because this technology is at core surface electrolytic deposition copper metal layer, and coring stays to such an extent that copperly connect pipe, no mechanical moulding and hot weld operation in the process more again, so special multi-ported copper pipe of this explained hereafter, weight is lighter, and profile is just being advised, and the mechanical resistance resistance to spalling is big, solderless is doubted, the tube wall thickness is even, and inner chamber is smooth, and is unstressed; Produce complex-shaped connect pipe with mechanical processing method more and have highly difficult comparing, the Guan Ze ratio that connects that this explained hereafter is complex-shaped is easier to more because with the making of taking over the corresponding core rod of shape, realize than being easier to.
With embodiment and product accompanying drawing technological scheme of the present invention is described further below.
Fig. 1 is a kind of copper pipes that connect made from the alloy core rod more;
Fig. 2 is a kind of copper pipes that connect made from the plastics core rod more.
Embodiment's 1 production process of special multi-ported copper pipe, carry out according to the following steps:
1, according to the cavity shape system master mold that connect pipe shown in Figure 1 more; If the product consumption I is with easy-formation material system master molds such as gypsum or cement, the big available aluminium of product consumption or other easy processing metal system master molds.
2, the alloy liquid of leaded 10 parts of injection, 10 parts in tin, 40 parts of indiums, 40 parts of bismuths in master mold makes core rod; This alloy core rod fusing point is about 78 ℃;
3, core surface is deoiled, is polished;
4, carry out electrochemistry copper facing in core surface; This example adopts the full acidic copper-plating of bright of M-N, its process specification such as table 1 expression;
Table 1
| The medicine name | Process specification |
| Sulfuric acid Tong, g/L | ????150-220 |
| Ethylene thiourea (N), mg/L | ????0.2-0.7 |
| Mercaptobenzoimidazole (M), mg/L | ????0.3-1.0 |
| Sodium polydithio-dipropyl sulfonate (SP), mg/L | ????10-20 |
| Polyethyleneglycol, g/L | ????0.05-0.1 |
| Sulfuric acid, g/L | ????40-80 |
| Lauryl sodium sulfate, g/L | ????0.05-0.1 |
| ????CI -，mg/L | ????10-80 |
| Temperature, ℃ | ????5-40 |
| Current density, A/dm 2 | ????1.5-5 |
The thickness of coating can be determined according to the electric current [strength and the product of current"on"time of plating piece outer surface unit area, roughly is, switches on 12A hour/square decimeter, gets thickness of coating 0.15mm.Should make the plating piece shake in the electroplating process, also will keep various content of additive in the electroplate liquid.This routine power taking current density is the 4A/ square decimeter, and temperature 30-35 ℃, other all get limit value on the table 1; After electroplating in 12 hours, record coating, be that many siphunculus wall thickness is 0.6 millimeter.
5, with the molten core rod that goes behind the gained plating piece otch, the surperficial comparatively coarse pipe that connects more; This routine core rod fusing point is 78 ℃, just can remove core rod with the boiling water hot melt;
6, with the nitre of 25-30%. acidic solution to connect more pipe do in pickling, remove the residual alloy mould core material of internal surface;
7, do the outer surface polishing with buffing machine;
8, running-on shaping, the mouth of pipe that soon connects pipe whole to the regulation shape more, remakes surface passivation; This example CrO of 80-100g/L
3The solution passivation; Cleaning, drying gets finished product shown in Figure 1 then.Embodiment's 2 production process of special multi-ported copper pipe are undertaken by last routine step, and wherein: step 2 is the alloy liquid of leaded 44.5 parts of injection in master mold, 55.5 parts of bismuths, makes core rod; This core rod fusing point is 124 ℃; Step 5 adds hot melt and removes core rod for looking the core rod fusing point; Other step standards are identical with last example.
Embodiment's 3 copper abnormal shapes connect the adapter production technology more, carry out according to the following steps:
1, according to the cavity shape system master mold that connect pipe shown in Figure 2 more;
2, in master mold, inject the ABS melt, make core rod;
3, this core surface is carried out sensitization, activation, reduction processing and electroless copper in succession; Wherein:
Sensitization is that a kind of of solution 1,2,3 that core rod immerses row shown in the table 2 carried out, and soak time is 3 minutes, generally is all could in 1-5 minute; Can at room temperature carry out; Soaking part suitably is dithered as suitable; Taking out core rod after the sensitization also washes;
Activation is that a kind of of solution 1,2,3,4,5 that core rod immersion table 3 after the sensitization is listed carries out, and generally gets final product at room temperature 0.5-5 minute;
Drying process after the core rod that the reduction processing is taken out after being meant and will activating is done to wash;
Electroless copper is that listed first, the second mixed solution of core rod immersion table 4 after handling through reduction is carried out; Soak time is 10 minutes, generally is all could in 5-20 minute; The control temperature is 30 ℃, generally is 20-32 ℃ and all can; Thickness is chemical plating copper layer about 5 microns, general thickness is that the 0.25-10 micron all can;
Through above-mentioned processing, the ABS core surface forms a conductive layer;
4, carry out electrochemistry copper facing on the ABS core rod of above-mentioned tool surface conductance layer, its process scale is identical with example 1, example 2;
5, remove the ABS core rods in 150 ℃ of hot melts behind the otch, the surperficial comparatively coarse pipe that connects more;
6, heating is scratched and is connected the residual ABS of pipe internal surface more;
7, outer surface polishing;
8, running-on shaping and surface passivation, identical with example 1, example 2.This routine gained finished product as shown in Figure 2.
Embodiment's 4 production process of special multi-ported copper pipe, with the ABS of PP alternative 3, other process specifications are identical with example 3.
Embodiment 5 is with the ABS of wax alternative 3, and by example 3 step system products, wherein step 6 can be saved; Hot melt goes desirable 100 ℃ of core rod temperature.
Table 2
| ????1 | ????2 | ????3 |
| ?SnCl 2?10g | ??TiCl 3?50g | Stannous fluoboric acid (47%) 20g |
| Hydrochloric acid (1.19) 40mL | Hydrochloric acid (1.19) 50mL | Fluoboric acid 10mL |
| Water 1000mL | Water 1000mL | Water 1000mL |
Table 3
| ????1 | ????2 | ????3 | ????4 | ????5 |
| ????AgNO 3????1.5-2g/L | ????AgNO 3????20-30g/L | ?PdCl 2?0.25g/L | ?PdCl 2?0.25g/L | ?AuCl 3?0.1g/L |
| It is transparent to solution to add ammoniacal liquor | Alcohol 500mL | Alcohol 500mL | Hydrochloric acid (1.19) 2.5mL | Hydrochloric acid (1.19) 2.5mL |
| ????1000mL | ????500mL | ?500mL | ?1000mL | 1000mL |
Table 4
| First liquid: copper sulfate sodium potassium tartrate tetrahydrate sodium hydroxide sodium carbonate nickel chloride | ????14g/L ????30-50g/L ????6-9g/L ????4g/L ????4g/L |
| Second liquid: formaldehyde (37%) | ????20mL/L |
| ????PH | ????12 |
The foregoing description 1-5 can substitute the full acidic copper-plating of bright of said M-N with the full acidic copper-plating of bright of SH-110 at the core rod electroless copper that powers on, and these two kinds of copper facing all belong to hydrosulphate whole bright plating copper.
Above-mentioned hydrosulphate whole bright plating copper can substitute with pyrophosphate copper plating, and its process specification example such as table 5 are listed.This method concentration of electrolyte height is joined the groove investment greatly, and solution is easily aging, so cost is higher.
Above-mentioned hydrosulphate whole bright plating copper also can substitute with cyanide copper plating, and its process specification example such as table 6 are listed.This method has severe toxicity because of electrolytic solution, so operator's health care condition harshness, wastes treatment expense is big.
Table 5
| Process specification | ????1 | ????2 | ????3 | ????4 | |
| Solution composition | ??Cu 2P 2O 7?CuSO 4.H 2O ?K 4P 2O 7.3H 2O ?K 3C 6H 5O 7.H 2O (NH 4) 2H(C 6H 5O 7) ????K 2HPO 4????NH 4NO 3?NH 4OH?mL/L ????SeO 22 mercaptobenzoimidazoles, 2 mercapto benzothiazoles | ????60-70 ????280-320 ????20-25 | ?70-90 ?300-380 ?10-15 ?0.008-0.02 ?0.002-0.04 | ????37-43 ????175-185 ????20-30 ????6-10 | ?50-65 ?350-400 ?2-3 ?0.008-0.02 ?0.002-0.004 |
| Operational condition | PH value temperature ℃ current density A/dm 2 | ????8.2-8.8 ????30-40 ????1.0-1.5 | ?8.0-8.8 ?30-50 ?1.5-3 | ????7.2-7.8 ????35-45 ????0.8-1.4 | ?8.4-8.8 ?30-40 ?0.5-1.0 |
Table 6
| ????1 | ????2 | ????3 | |
| ????CuCN?g/L ????NaCN?g/L ????NaOH?g/L ????Na 2CO 3?g/L ?KNaC 4H 4O 6?g/L ????KCBS?g/L ?MnSO 4.5H 2O?g/L | ????8-35 ????12-54 ????2-10 | ????26 ????35 ????10 ????30 ????45 | ????50-70 ????65-92 ????15-20 ????10-15 ????12-18 ??0.08-0.12 |
| Current density, A/dm temperature ℃ | ????0.2-2 ????18-50 | ????2-6 ????50-60 | ????1.5-3 ????55-65 |
Claims (10)
1, production process of special multi-ported copper pipe is characterized in that may further comprise the steps:
A, according to the cavity shape system master mold of said adapter;
B, in master mold, inject core material, the molding core;
C, at the core rod electroless copper that powers on, reach the copper layer of desired thickness;
The molten core rod that goes gets special multi-ported copper pipe behind d, the otch.
2, production process of special multi-ported copper pipe as claimed in claim 1 is characterized in that, step b injects low melting alloy, the molding core in master mold.
3, production process of special multi-ported copper pipe as claimed in claim 1 is characterized in that, step b is an injected plastic in master mold, the molding core.
4, production process of special multi-ported copper pipe as claimed in claim 1 is characterized in that, step b injects wax, the molding core in master mold.
5, production process of special multi-ported copper pipe as claimed in claim 2 is characterized in that, before the low melting alloy core rod powers on electroless copper, this core rod is deoiled as the surface and polishes.
6, as claim 3 or 4 described production process of special multi-ported copper pipe, it is characterized in that, before plastics core rod, wax-pattern core power on electroless copper, this core surface is carried out sensitization, activation, reduction processing and electroless copper.
As the described production process of special multi-ported copper pipe of any claim among the claim 1-6, it is characterized in that 7, the gained special multi-ported copper pipe is done outer surface polishing, running-on shaping and surface passivation and handled.
8, production process of special multi-ported copper pipe as claimed in claim 7 is characterized in that, to wherein connecting pipe with what the alloy core rod made more, doing the outer surface polishing, running-on shaping and surface passivation are carried out interior pickling before handling, and remove the residual alloy mould core material of internal surface.
9, production process of special multi-ported copper pipe as claimed in claim 7 is characterized in that, to wherein connecting pipe with what the plastics core rod made, before doing outer surface polishing, running-on shaping and surface passivation and handling, the internal surface residual plastic is burnt in heating more.
10, production process of special multi-ported copper pipe as claimed in claim 3 is characterized in that, injects a kind of melt of ABS, PP in master mold, the molding core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95115940 CN1145994A (en) | 1995-09-21 | 1995-09-21 | Production process of special multi-ported copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95115940 CN1145994A (en) | 1995-09-21 | 1995-09-21 | Production process of special multi-ported copper pipe |
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| Publication Number | Publication Date |
|---|---|
| CN1145994A true CN1145994A (en) | 1997-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95115940 Pending CN1145994A (en) | 1995-09-21 | 1995-09-21 | Production process of special multi-ported copper pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422388C (en) * | 2004-04-18 | 2008-10-01 | 新昌县梅渚远景塑料制品厂 | Process and device for casting multi-path copper connection pipe |
-
1995
- 1995-09-21 CN CN 95115940 patent/CN1145994A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422388C (en) * | 2004-04-18 | 2008-10-01 | 新昌县梅渚远景塑料制品厂 | Process and device for casting multi-path copper connection pipe |
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