CN103786291A - Method for manufacturing cast polyurethane elastomer pump case - Google Patents
Method for manufacturing cast polyurethane elastomer pump case Download PDFInfo
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- CN103786291A CN103786291A CN201410031318.6A CN201410031318A CN103786291A CN 103786291 A CN103786291 A CN 103786291A CN 201410031318 A CN201410031318 A CN 201410031318A CN 103786291 A CN103786291 A CN 103786291A
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- pump case
- polyurethane elastomer
- type polyurethane
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention aims to provide a new method for manufacturing a pump case. The pump case manufactured by the method has wear-resisting, anti-corrosion and anti-collision properties, and also can be demolded quickly and efficiently, the inner part of the pump case is smooth and non-deformable, and the manufacturing cost of the pump case is low. The method is characterized in that the pump case is manufactured with a cast polyurethane elastomer material, a pump case contour upper die and a pump case contour lower die are fabricated with a heat-resisting alloy, and a pump case inner cavity die is fabricated with a thermoplastic elastomer, silicone rubber or fluororubber. The fabricated pump case has the advantages of wear-resisting, anti-corrosion and anti-collision properties and is smooth in inner cavity.
Description
Technical field
The present invention relates to pump technical field, particularly a kind of manufacture method of casting type polyurethane elastomer pump case.
Background technology
Pump is the machinery of carrying liquid or making liquid supercharging.It sends the mechanical energy of prime mover or other external energies to liquid, and liquid energy is increased.Pump is mainly used to carry liquid, comprises water, oil, acid & alkali liquid, emulsion, suspended emulsion and liquid metal etc.; Also can carry gas, gas-liquid mixture, solidliquid mixture, as mud, coal slurry, ore pulp etc., and gas-solid-liquid three-phase mixture, as water air silt etc.
Being widely used of pump, in national product life, occupy very important position, and pump case in present used all kinds of pumps is formed by metal casting substantially, in casting process, needing the core of using is molding sand loss core, molding sand loss core uses molding sand in the time of casting, after injection moulding, to make its pulverizing for taking out core, the step time of taking out core is long, job requirements is high, careless slightlyly will cause cut in pump case inside, and same core cannot recycle, while casting, need again the material forming after core is pulverized to be again processed into core next time, waste time and energy.
For solving the variety of problems existing in the manufacture process of above pump, need a kind of new pump case manufacture method of invention badly, use the pump case of the method manufacturing to there is performance wear-resisting, corrosion-resistant, resistance to collision, the demoulding quickly and efficiently and pump case smooth interior, indeformable, manufacturing cost is lower.
Summary of the invention
Technical problem to be solved by this invention is, a kind of manufacture method of casting type polyurethane elastomer pump case is provided, this manufacture method makes the demoulding quickly and efficiently of prepared pump case and guarantees pump case smooth interior, wear-resisting, corrosion-resistant, resistance to collision, indeformable, can also save manufacturing cost simultaneously.
For solving the problems of the technologies described above, the manufacture method step that the present invention adopts is as follows:
A. with heat-resisting alloy manufacture the pump case profile patrix with cast gate and peephole and inner have in cavity and cavity, have protruding pump case profile counterdie;
B. with thermoplastic elastomer (TPE) or silicon rubber or fluorubber manufacture pump case inner chamber mould;
C. pump case inner chamber die sleeve is combined in the projection in pump case profile counterdie cavity, then pump case profile upper mould cover is made to assembling die above pump case profile counterdie, pump case inner chamber mould, pump case profile patrix and pump case profile counterdie are at the inner die cavity that forms of assembling die;
D. assembling die is put into heater and be heated to 110-140 ℃ with for subsequent use;
E. the performed polymer of casting type polyurethane elastomer (semi-finished product) is put into after reactor is heated to 70-110 ℃ and vacuumized dehydration, add wherein again the curing agent MoCA of polyurethane to make composite material, composite material is stirred, and the deal of the MoCA injecting is the 10%-25% of the performed polymer deal of reactor casting type polyurethane elastomer;
F. pour composite material into casting machine;
G. assembling die is taken out to heater, be communicated with the cast gate of casting machine and pump case profile patrix, start casting machine, casting machine is injected into its inner composite material the die cavity of assembling die, when observing the die cavity of assembling die from the peephole of pump case profile patrix and being filled with, close casting machine, casting machine stops injection, the moulding of casting type polyurethane elastomer pump case;
H. assembling die is put into heater again, be heated to 110-140 ℃ and keep 1-2 hour, improve the intensity of the casting type polyurethane elastomer pump case in assembling die die cavity;
I. assembling die is taken out from heater, pump case profile patrix is removed from pump case profile counterdie, in type casting type polyurethane elastomer pump case is taken out from the cavity of pump case profile counterdie, pump case inner chamber mould is taken out from the inside of casting type polyurethane elastomer pump case, pump case manufacture completes again.
Preferably, steps d, g, h, the heater described in i is baking box.
Adopt after above structure, the technique effect that the present invention produces is as follows: owing to adopting casting type polyurethane elastomer material to manufacture pump case, therefore that prepared pump case has is wear-resisting, corrosion-resistant, the characteristic of resistance to collision; Pump case profile patrix, pump case profile counterdie use heat-resisting alloy to make, and heat-resisting alloy at high temperature has good mechanical performance and chemical stability, and made pump case profile patrix, pump case profile counterdie can repeatedly use, and provide cost savings; Pump case inner chamber mould has adopted thermoplastic elastomer (TPE) or silicon rubber or fluorubber to make, pump case inner chamber mould can not follow the string after being heated to 140 °, therefore in the demoulding, can easily pump case inner chamber mould be taken out and can not scratch pump case inside from pump case inside, guarantee pump case smooth interior, indeformable, and this pump case inner chamber mould takes out in pump case, also can reuse, provide cost savings.
The specific embodiment
Below the present invention is described in more detail.
In step a with heat-resisting alloy manufacture the pump case profile patrix with cast gate and peephole and inner have in cavity and cavity, have protruding pump case profile counterdie.Heat-resisting alloy, this class alloy claims again high temperature alloy, along with the rising of temperature, the mechanical performance of metal material significantly declines, the corresponding increase of trend of oxide etch, therefore, general metal material all can only long-term work at 500-600 ℃, the metal common name heat-resisting alloy that can work under >700 ℃ of high temperature, " heat-resisting " refers to that it at high temperature can keep enough intensity and good non-oxidizability.Wherein, refractory Fe-base alloy, Refractoloy, molybdenum based heat resistant alloy, niobium based heat resistant alloy and tungsten based heat resistant alloy, they at high temperature all have good mechanical performance and chemical stability.The following material of the concrete optional use of heat-resisting alloy using in step a of the present invention: refractory Fe-base alloy GH1131, it can use for a long time at 900 ℃, there are higher intensity and good combination property, at 1000 ℃, use and can reach enough instantaneous strengths in short-term, hot-workability is good, is easy to welding, cold forming; Refractory Fe-base alloy GH2036, alloying component is simple, and tissue is stable, and it has good physical and mechanical properties at 600-650 ℃, and has good machinability; Refractory Fe-base alloy GH2038, it has enough heat resistances 700 ℃ of following uses, and has good machinability and weldability; Refractory Fe-base alloy GH2130 has good hot-workability, and it is 800 ℃ of following long-term use its tissue and stable performances; Refractoloy GH3039, its 800 ℃ following use have enough creep rupture strengths, good cold and hot fatigue behaviour and antioxygenic property, long-term using-system is stable, and be easy to welding, cold stamping is shaped; Refractoloy GH4033, it has satisfied elevated temperature strength at 750 ℃, has below good antioxygenic property, and have good hot-working and machining property at 900 ℃, is easy to forging rolling and becomes a useful person; Refractoloy GH4169, it has at 650 ℃ the feature that yield strength is high, plasticity is good below, and has higher corrosion-resistant and antioxygenic property, and weldability is good, is easy to be shaped.
In step b, manufacture pump case inner chamber mould with thermoplastic elastomer (TPE) or silicon rubber or fluorubber.Thermoplastic elastomer (TPE) (the English TPE that is called for short), claim again artificial rubber or synthetic rubber, it had both possessed the high resiliency of traditional cross-linking vulcanized rubber, ageing-resistant, the every excellent properties of oil resistivity, possesses again the feature that common plastics is easy to process, processing mode is wide simultaneously, in the time of temperature rise, thermoplastic elastomer (TPE) still can keep good performance, and long-term heatproof can exceed 70 ℃.Silicon rubber (English name: Silicone rubber), it has tasteless nontoxic, is not afraid of high temperature and resists the feature of severe cold, does not still lose original intensity and elasticity in the time of 300 degrees Celsius and subzero 90 degrees Celsius.Fluorubber (fluoro rubber) is the synthetic rubber that contains fluorine atom, the characteristic that fluorubber has is high temperature resistant, oil resistant and the medicine of resistance to number of chemical corrode, and the resistance to elevated temperatures of fluorubber is the same with silicon rubber, can be described as in current elastomer best.In addition, (elastomer refers to that vitrification point is lower than room temperature to the elastomer that other have same performance, do not follow the string after can heating at 140 ° of temperature, elongation at break >50%, external force is withdrawn from the good macromolecular compound of rear restoration) also can be used as the material of the made pump case inner chamber mould of step b.
Step c is combined in pump case inner chamber die sleeve in the projection in pump case profile counterdie cavity, again pump case profile upper mould cover is made to assembling die above pump case profile counterdie, between the inner pump case inner chamber mould of assembling die and pump case profile patrix, pump case profile counterdie, have space, this space is the die cavity of assembling die.
Steps d is put into baking box by assembling die and is heated to 110-140 ℃ with for subsequent use.
Step e puts into the performed polymer of casting type polyurethane elastomer (semi-finished product) after reactor is heated to 70-110 ℃ and vacuumizes dehydration, add wherein again the curing agent MoCA of polyurethane to make composite material, composite material is stirred, and the deal of the MoCA injecting is the 10%-25% of the performed polymer deal of reactor casting type polyurethane elastomer.Polyurethane elastomer is a kind of novel high polymer synthetic material between rubber and plastics, and it had not only had the high strength of plastics but also had had the high resiliency of rubber, and its characteristic is: 1, anti-wear performance height is 3-5 times of natural rubber; 2, oil resistance is well 4 times of nitrile rubber; 3, high its breaking strength, tearing strength of mechanical strength and bear much higher times of the energy force rate General Purpose Rubber of load; 4, acid and alkali-resistance, low temperature resistant, solvent resistance is excellent; 5, high with the adhesive strength of metallic framework plate, can carry out machining; 6, hardness range is wide, in the elastic range of Shao A10-Shao A100, can adjust arbitrarily.Wherein, casting type polyurethane elastomer (being called for short CPU), is the one most widely used in polyurethane elastomer, output is maximum, advantage is wear-resisting, corrosion-resistant, resistance to collision, temperature tolerance is good, intensity is high, hardness range broadness, extremely softness also can be extremely hard, and shortcoming is not recyclable.The production method of casting type polyurethane elastomer is: the first step is produced the performed polymer (semi-finished product) of casting type polyurethane elastomer, or on market, buys the performed polymer of casting type polyurethane elastomer; Second step adds the curing agent of polyurethane to make composite material in performed polymer, is mixed; The 3rd step is injected composite material in mould, adds thermal maturation and obtains finished product.Due to this liquid state as thickness of performed polymer of casting type polyurethane elastomer, wherein contain moisture, and the curing agent MoCA of moisture meeting and added polyurethane produces reaction, and form bubble in the pump case after moulding, therefore the performed polymer of casting type polyurethane elastomer need to be put into after reactor is heated to 70-110 ℃ and vacuumize dehydration, and then add the curing agent MoCA of polyurethane.The Chinese of MoCA is 4,4'-diaminourea-3,3'-dichloro diphenyl methane, and the molecular formula of MoCA is C13H12Cl2N2, adds the performed polymer of the casting type polyurethane elastomer after MoCA to need rapid stirring evenly to prevent that it from just solidifying before injection assembling die.
Step f pours composite material in casting machine into.
Assembling die is taken out baking box by step g, be communicated with the cast gate of casting machine and pump case profile patrix, start casting machine, casting machine starts its inner composite material to be injected into the die cavity of assembling die, when observing the die cavity of assembling die from the peephole of pump case profile patrix and being filled with, shut casting machine and stop injection, the moulding of casting type polyurethane elastomer pump case.Because the assembling die temperature after steps d is 110-140 °, the temperature of the composite material after step e is 70-110 °, therefore while composite material being injected to assembling die die cavity in step g, between composite material and assembling die, there is the temperature difference, contact-making surface between casting type polyurethane elastomer pump case and the assembling die of institute's moulding is difficult for bonding, therefore the inner chamber of casting type polyurethane elastomer pump case is smooth.And the pump case that metal casting forms is because its manufacture method is limit, metal pump case inner chamber is coarse, metal pump case inner chamber is greater than to the resistance that enters the current of pump case and cause the resistance that the inner chamber of same size casting type polyurethane elastomer pump case causes entering the current of pump case, has so just improved the operating efficiency that adopts the pump of casting type polyurethane elastomer pump case.
For improving the intensity of casting type polyurethane elastomer pump case, therefore again the casting type polyurethane elastomer pump case of assembling die and inside thereof is put into together in baking box and is heated to 110-140 ° in step h, maintain 1-2 hour.
Finally, in step I, assembling die is taken out from baking box, pump case profile patrix is removed from pump case profile counterdie, in type casting type polyurethane elastomer pump case is taken out from the cavity of pump case profile counterdie, pump case inner chamber mould is taken out from the inside of casting type polyurethane elastomer pump case, pump case manufacture completes again.Because adopting thermoplastic elastomer (TPE) or silicon rubber or fluorubber manufacture, pump case inner chamber mould forms, pump case inner chamber mould can not follow the string after being heated to 110-140 °, does not scratch the inner surface of pump case therefore can easily pump case inner chamber mould be taken out from the inside of casting type polyurethane elastomer pump case in step I.And can also reuse after this pump case inner chamber mould, save manufacturing cost.
By above step, the demoulding quickly and efficiently of the prepared pump case of the present invention and assurance pump case smooth interior, indeformable; Because pump case adopts casting type polyurethane elastomer material, pump case also has advantages of wear-resisting, corrosion-resistant, resistance to collision; Thereby mould can provide cost savings by Reusability in addition.
The above embodiment of the present invention is can not be used for limiting the present invention to explanation of the present invention, and any change in implication and the scope suitable with claims of the present invention, all should think to be included in the scope of claims.
Claims (2)
1. a manufacture method for casting type polyurethane elastomer pump case, comprises the steps:
A. with heat-resisting alloy manufacture the pump case profile patrix with cast gate and peephole and inner have in cavity and cavity, have protruding pump case profile counterdie;
B. with thermoplastic elastomer (TPE) or silicon rubber or fluorubber manufacture pump case inner chamber mould;
C. pump case inner chamber die sleeve is combined in the projection in pump case profile counterdie cavity, then pump case profile upper mould cover is made to assembling die above pump case profile counterdie, pump case inner chamber mould, pump case profile patrix and pump case profile counterdie are at the inner die cavity that forms of assembling die;
D. assembling die is put into heater and be heated to 110-140 ℃ with for subsequent use;
E. the performed polymer of casting type polyurethane elastomer (semi-finished product) is put into after reactor is heated to 70-110 ℃ and vacuumized dehydration, add wherein again the curing agent MoCA of polyurethane to make composite material, composite material is stirred, and the deal of the MoCA injecting is the 10%-25% of the performed polymer deal of reactor casting type polyurethane elastomer;
F. pour composite material into casting machine;
G. assembling die is taken out to heater, be communicated with the cast gate of casting machine and pump case profile patrix, start casting machine, casting machine is injected into its inner composite material the die cavity of assembling die, when observing the die cavity of assembling die from the peephole of pump case profile patrix and being filled with, close casting machine, casting machine stops injection, the moulding of casting type polyurethane elastomer pump case;
H. assembling die is put into heater again, be heated to 110-140 ℃ and keep 1-2 hour, improve the intensity of the casting type polyurethane elastomer pump case in assembling die die cavity;
I. assembling die is taken out from heater, pump case profile patrix is removed from pump case profile counterdie, in type casting type polyurethane elastomer pump case is taken out from the cavity of pump case profile counterdie, pump case inner chamber mould is taken out from the inside of casting type polyurethane elastomer pump case, pump case manufacture completes again.
2. the manufacture method of casting type polyurethane elastomer pump case as claimed in claim 1, is characterized in that: steps d, and g, h, the heater described in i is baking box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031318.6A CN103786291B (en) | 2014-01-23 | 2014-01-23 | The manufacture method of casting type polyurethane elastomer pump case |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031318.6A CN103786291B (en) | 2014-01-23 | 2014-01-23 | The manufacture method of casting type polyurethane elastomer pump case |
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| Publication Number | Publication Date |
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| CN103786291A true CN103786291A (en) | 2014-05-14 |
| CN103786291B CN103786291B (en) | 2016-02-24 |
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| CN201410031318.6A Active CN103786291B (en) | 2014-01-23 | 2014-01-23 | The manufacture method of casting type polyurethane elastomer pump case |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108407157A (en) * | 2018-02-10 | 2018-08-17 | 安徽省庐江县盛林机械有限公司 | A kind of pump case and its manufacturing method |
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| GB2121813B (en) * | 1982-05-01 | 1985-09-18 | Belzona Molecular Metalife | Polyurethane composition |
| US4758603A (en) * | 1987-08-28 | 1988-07-19 | The Dow Chemical Company | Dithiocarbamate internal mold release agents |
| CN1273330A (en) * | 2000-06-28 | 2000-11-15 | 孙平 | Method for manufacturing stator of screw pump |
| ZA200807270B (en) * | 2007-05-22 | 2009-12-30 | Gary Arthur Down | A centrifugal pump |
| JP2011026571A (en) * | 2009-06-26 | 2011-02-10 | Sumitomo Chemical Co Ltd | Thermoplastic resin composition reinforced by low convergent fiber |
| CN102807665A (en) * | 2012-08-27 | 2012-12-05 | 马鞍山市天鑫辊业有限责任公司 | Low-hardness pouring polyurethane rubber roller and production method thereof |
| JP5259986B2 (en) * | 2007-05-25 | 2013-08-07 | ソ・エッフェ・テル、テクノポリメリ、ソシエタ、ア、レスポンサビリタ、リミタータ | Injection molding process for producing fully reusable multilayers |
-
2014
- 2014-01-23 CN CN201410031318.6A patent/CN103786291B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121813B (en) * | 1982-05-01 | 1985-09-18 | Belzona Molecular Metalife | Polyurethane composition |
| US4758603A (en) * | 1987-08-28 | 1988-07-19 | The Dow Chemical Company | Dithiocarbamate internal mold release agents |
| CN1273330A (en) * | 2000-06-28 | 2000-11-15 | 孙平 | Method for manufacturing stator of screw pump |
| ZA200807270B (en) * | 2007-05-22 | 2009-12-30 | Gary Arthur Down | A centrifugal pump |
| JP5259986B2 (en) * | 2007-05-25 | 2013-08-07 | ソ・エッフェ・テル、テクノポリメリ、ソシエタ、ア、レスポンサビリタ、リミタータ | Injection molding process for producing fully reusable multilayers |
| JP2011026571A (en) * | 2009-06-26 | 2011-02-10 | Sumitomo Chemical Co Ltd | Thermoplastic resin composition reinforced by low convergent fiber |
| CN102807665A (en) * | 2012-08-27 | 2012-12-05 | 马鞍山市天鑫辊业有限责任公司 | Low-hardness pouring polyurethane rubber roller and production method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108407157A (en) * | 2018-02-10 | 2018-08-17 | 安徽省庐江县盛林机械有限公司 | A kind of pump case and its manufacturing method |
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| CN103786291B (en) | 2016-02-24 |
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Address after: 315157 No.68 Xinzhuang Road, Gaoqiao Town, Haishu District, Ningbo City, Zhejiang Province Patentee after: NINGBO YIERKA SEALS Co.,Ltd. Address before: 315157 No.68 Xinzhuang Road, Gaoqiao Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO YIERKA SEALS Co.,Ltd. |