CN103991164A - Manufacturing method of plastic inlet manifold - Google Patents
Manufacturing method of plastic inlet manifold Download PDFInfo
- Publication number
- CN103991164A CN103991164A CN201410209474.7A CN201410209474A CN103991164A CN 103991164 A CN103991164 A CN 103991164A CN 201410209474 A CN201410209474 A CN 201410209474A CN 103991164 A CN103991164 A CN 103991164A
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- China
- Prior art keywords
- rubber sleeve
- pressure
- inlet manifold
- overflow valve
- air intake
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a manufacturing method of a plastic inlet manifold. The manufacturing method comprises the steps: manufacturing a rubber sleeve which is completely identical to an inner cavity of a required inlet manifold in shape by using a rubber material; placing the rubber sleeve into a mould cavity of an inlet manifold injection mould; before injection molding, firstly, filling water into the rubber sleeve through a high-pressure water pump to ensure that the rubber sleeve is expanded to reach a size which is equal to the inner diameter of the required plastic inlet manifold; starting injecting a plastic melt into the mould, then raising the water pressure in the rubber sleeve, keeping the water pressure to be equal to the pressure of the melt; after injection molding is completed and a product is cooled and sized, closing the high-pressure water pump, opening the mould, dewatering and decompressing the rubber sleeve, and extracting the sized inlet manifold from the rubber sleeve to obtain a qualified plastic inlet manifold. The manufacturing method has the advantages of reducing the energy consumption and environment pollution of the inlet manifold in a production process, and increasing the flowing velocity of gas in the inlet manifold, thereby improving the fuel economic of the engine.
Description
Technical field
The present invention relates to the inlet manifold for automobile engine, specifically a kind of manufacture method of the motor intake manifold taking plastics as material.
Background technology
Inlet manifold (Automotive Air Intake, be called for short AIM) be one of key components and parts of automobile engine, major function is to distribute to swimmingly the each cylinder body of engine after air and fuel oil are evenly mixed, and is a complex structure, required precision is high, manufacture difficulty is large part.Traditionally, the material of manufacturing inlet manifold is cast iron or aluminium alloy, but along with the requirement that automotive light weight technology develops, engineering plastics (as the nylon 66 that glass fibre strengthens, being called for short PA66+GF) the replacement aluminium alloy that industry starts to attempt adopting density less is manufactured inlet manifold.
At present, the technique of manufacturing inlet manifold mainly contains two kinds, and the one, fusible core injection molding method, the 2nd, welding fabrication method after Split injection.The former principle is that first the ashbury metal by low melting point is made the inner chamber core of inlet manifold, then put it in mould, to injected plastic melt in mould, after cooling and shaping, take out the goods that comprise ashbury metal core, put it into again in pyrosol core is heated until ashbury metal core is melted, obtain after treatment overall plastic air intake manifold.The latter's principle is in the time of design plastic air intake manifold, baroque inlet manifold is split as to structure is relatively simple, multi-disc plastics split that can single injection-molded, by after the injection mo(u)lding of each plastics split difference, recycling friction-welding machine welds each split one by one, the inlet manifold of final complete.
In two kinds of above-mentioned techniques, the goods precision of fusible core injection molding method is high, inner chamber is smooth, total quality good, but exist, energy consumption is large, contaminated environment heavy, high in cost of production shortcoming; And after Split injection the energy consumption of the friction welding method of forming relatively low, pollute light, manufacturing cost is relatively low, but has the shortcomings such as inlet manifold inner chamber has smooth not, goods precision deficiency, total quality is low, percent defective is high.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and the manufacture method of a kind of technique advanced person, energy-conserving and environment-protective, plastics air inlet manifold branch of engine that integrated cost is low is provided.
The technical scheme that realizes the object of the invention is:
A manufacture method for plastic air intake manifold, comprises the steps:
1, make one and the identical rubber sleeve of required inlet manifold cavity shape, the arm that rubber sleeve comprises a supervisor and communicates with supervisor with elastomeric material;
2, in the die cavity of plastic air intake manifold injection mold, inlay a pressure sensor, in the time of injection moulding, can immediately detect the force value of plastic melt in die cavity;
3, the rubber sleeve of step 1 being made, be placed in the die cavity of plastic air intake manifold injection mold, one end of rubber sleeve supervisor connects high-pressure hydraulic pump, and the other end connects electronic overflow valve, between the outlet of being responsible for and electronic overflow valve, be parallel with Pressure gauge, to observe the hydraulic pressure value in rubber sleeve; Also be provided with single-chip microcomputer and be connected with pressure sensor and electronic overflow valve, the opening pressure of overflow valve is subject to the control of MCU Instruction, and the outlet of overflow valve is connected to radiator, and the water outlet of overflow valve is back to water tank through radiator heat-dissipation, after cooling and recycles;
4, before injection moulding, in rubber sleeve, inject cooling water by high-pressure hydraulic pump, adjust the size of electronic overflow valve opening pressure, make rubber sleeve expand into the size equating with the internal diameter of required plastic air intake manifold;
5, the injection mold that closes, starts toward injected plastic melt in mould;
6, along with the continuous filling of plastic melt, melt pressure in die cavity rises rapidly, pressure sensor in die cavity detects the variation of melt pressure and this signal is transferred to and in single-chip microcomputer, carries out data and relatively process, single-chip microcomputer sends control signal with backward electronic overflow valve, adjust the opening pressure of overflow valve, hydraulic pressure in rubber sleeve rises immediately, and remains to melt pressure and equate;
7, injection moulding is complete, after goods cooling and shaping, closes high-pressure hydraulic pump, opens mould, after rubber sleeve draining pressure release, rubber sleeve is extracted out from the inlet manifold of forming, obtains qualified plastic air intake manifold goods.
In step 1, use perfluoroelastomers material, adopt prior art to make and the identical rubber sleeve of required inlet manifold cavity shape, the wall thickness of rubber sleeve is 0.5～1.0mm.Perfluoroelastomers has excellent resistance to elevated temperatures, under the high temperature of 300 DEG C, also can keep the elastic characteristic of rubber.Shape after rubber sleeve expands and the inner chamber of inlet manifold are in full accord, by test, demarcate in advance the specified hydraulic pressure value that expand into required size.
Plastic air intake manifold injection mold described in step 3 is prior art, and the placement of rubber sleeve is identical with traditional ashbury metal core.Rubber sleeve needs first to inject cooling water before injection moulding, to ensure that rubber sleeve expand into the size equating with the internal diameter of required plastic air intake manifold.Rubber sleeve is in the time of injection mo(u)lding, because having continuously cooling water, its inside flowing, the heat that current are delivered to high temperature plastics melt on rubber sleeve is taken away rapidly, thereby has ensured that rubber sleeve can not produce the phenomenon of breaking or melting because of contact high temperature plastics melt.
The manufacture of plastic air intake manifold of the present invention, owing to having replaced ashbury metal core with rubber sleeve, has avoided making, fusing and this complex process of recovery ashbury metal core.Rubber sleeve is after each injection mo(u)lding, and draining pressure release can be taken out, thereby can recycle.Therefore, the inventive method has been saved energy consumption greatly, has avoided environmental pollution.The inventive method compared with Split injection moulding welding, because it is without welding, the deformation defect that the weld seam forming while welding and when welding cause, therefore, the inner wall smooth degree of the plastic air intake manifold goods that make has obtained raising by a relatively large margin.
In sum, the plastic air intake manifold that adopts the inventive method to manufacture, has reduced energy consumption and environmental pollution, and can improve the flow rate of gas in inlet manifold, thereby improves the fuel economy of engine.
The present invention compared with prior art its beneficial effect is:
1. compared with fusible core injection molding method, avoid making, melted this process of tin matter core, thereby avoided environmental pollution, reduced energy consumption, reduced cost.
2. compared with Split injection moulding welding, due to without welding, the distortion causing when the weld seam forming while welding and welding, therefore, the inner wall smooth degree of inlet manifold has obtained significantly improving, therefore can improve the flow rate of gas in inlet manifold, thereby improve the fuel economy of engine.
3. the inlet manifold that adopts the method to manufacture, overall manufacturing cost significantly reduces.
Brief description of the drawings
Fig. 1 is the structural front view of embodiment rubber sleeve;
Fig. 2 is the side view of Fig. 1;
Fig. 3 be embodiment inlet manifold in the time of injection mo(u)lding to the connection diagram of relevant components and parts.
In figure, 1. electronic overflow valve 8. radiator 9. water tanks of high-pressure hydraulic pump 2. injection mold 3. rubber sleeve 3-1. rubber sleeve supervisor's 3-2. rubber sleeve arm 4. pressure sensor 5. single-chip microcomputer 6. Pressure gauge 7..
Detailed description of the invention
Below in conjunction with drawings and Examples, content of the present invention is further described, but is not limitation of the invention.
Embodiment
With reference to Fig. 1, Fig. 2 and Fig. 3, the present embodiment is for the manufacture that adopts the motor intake manifold that engineering plastics PA66+GF is material.
First, adopt perfluoroelastomers to produce one and the identical rubber sleeve 3 of required inlet manifold cavity shape, its wall thickness is between 0.5～1.0mm, and this rubber sleeve 3 can be rubbed arbitrarily, roll in the time not having water-filling.The arm 3-2 that rubber sleeve 3 comprises a supervisor 3-1 and communicates with supervisor 3-1.
Secondly, in the model cavity of plastic air intake manifold injection mold 2, inlay a pressure sensor 4, in the time of injection moulding, can immediately detect the force value of plastic melt in die cavity; While preparing injection moulding production, rubber sleeve 3 is put into the die cavity of inlet manifold injection mold 2, high-pressure hydraulic pump 1 is connected with the entrance of rubber sleeve supervisor 3-1, the outlet of supervisor 3-1 is connected with electronic overflow valve 7, between outlet and overflow valve 7, be parallel with Pressure gauge 6 to observe the hydraulic pressure value in rubber sleeve 3, the outlet of overflow valve 7 is connected to radiator 8, and the water outlet of overflow valve 7 is dispelled the heat, is back to water tank 9 after cooling and recycles through radiator 8.
When injection moulding, by high-pressure hydraulic pump 1, toward the interior injection cooling water of rubber sleeve 3, rubber sleeve 3 starts to expand, and adjusts the opening pressure of overflow valve 7, control hydraulic pressure in rubber sleeve 3 to reach predetermined force value, make rubber sleeve 3 expand into the size equating with the internal diameter of required plastic air intake manifold; Closed die 2, to the interior injected plastic melt of mould 2, along with the continuous filling of plastic melt, melt pressure in die cavity rises rapidly, pressure sensor 4 in die cavity detects the variation of melt pressure and this signal is transferred to and in single-chip microcomputer 5, carries out data and relatively process, and single-chip microcomputer 5 sends control signal to electronic overflow valve 7 immediately, adjusts the opening pressure of overflow valve 7, hydraulic pressure in rubber sleeve 3 rises immediately, and remains to melt pressure and equate; Injection moulding is complete, after goods cooling and shaping, closes high-pressure hydraulic pump 1, opens mould 2, discharges the water in rubber sleeve 3, and it is extracted out from the inlet manifold of forming, obtains qualified required plastic air intake manifold goods.
Adopt after above scheme, energy consumption and environmental pollution are reduced, simultaneously, the weld seam and the distortion that cause when not welding, therefore the smooth degree of the internal pipeline of inlet manifold is unaffected, thereby can improve the flow efficiency of gas in inlet manifold, thereby improve the fuel economy of engine.
Claims (2)
1. a manufacture method for plastic air intake manifold, is characterized in that comprising the steps:
(1) make one and the identical rubber sleeve of required inlet manifold cavity shape, the arm that rubber sleeve comprises a supervisor and communicates with supervisor with elastomeric material;
(2) in the die cavity of plastic air intake manifold injection mold, inlay a pressure sensor;
(3) rubber sleeve of step (1) being made, be placed in the die cavity of plastic air intake manifold injection mold, one end of rubber sleeve supervisor connects high-pressure hydraulic pump, the other end connects electronic overflow valve, between the outlet of being responsible for and electronic overflow valve, be parallel with Pressure gauge, to observe the hydraulic pressure value in rubber sleeve, also being provided with single-chip microcomputer is connected with pressure sensor and electronic overflow valve, the opening pressure of overflow valve is subject to the control of MCU Instruction, the outlet of overflow valve is connected to radiator, and the water outlet of overflow valve is back to water tank through radiator heat-dissipation, after cooling and recycles;
(4) before injection moulding, in rubber sleeve, inject cooling water by high-pressure hydraulic pump, adjust the size of electronic overflow valve opening pressure, make rubber sleeve expand into the size equating with the internal diameter of required plastic air intake manifold;
(5) injection mold that closes, starts toward injected plastic melt in mould;
(6) pressure sensor in die cavity detects the variation of melt pressure and this signal is transferred to and in single-chip microcomputer, carries out data and relatively process, single-chip microcomputer sends control signal to electronic overflow valve immediately, adjust the opening pressure of overflow valve, hydraulic pressure in rubber sleeve rises immediately, and remains to melt pressure and equate;
(7) injection moulding is complete, after goods cooling and shaping, closes high-pressure hydraulic pump, opens mould, after rubber sleeve draining pressure release, rubber sleeve is extracted out from the plastic air intake manifold of forming, obtains qualified plastic air intake manifold goods.
2. according to the manufacture method of the plastic air intake manifold described in right 1, it is characterized in that: step (1) adopts perfluoroelastomers material to make rubber sleeve, and the wall thickness of rubber sleeve is 0.5～1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209474.7A CN103991164B (en) | 2014-05-19 | 2014-05-19 | A kind of manufacture method of plastic air intake manifold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209474.7A CN103991164B (en) | 2014-05-19 | 2014-05-19 | A kind of manufacture method of plastic air intake manifold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103991164A true CN103991164A (en) | 2014-08-20 |
| CN103991164B CN103991164B (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410209474.7A Expired - Fee Related CN103991164B (en) | 2014-05-19 | 2014-05-19 | A kind of manufacture method of plastic air intake manifold |
Country Status (1)
| Country | Link |
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| CN (1) | CN103991164B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106945296A (en) * | 2017-04-24 | 2017-07-14 | 苏州科技大学 | Inlet manifold assembling test production system |
| CN110576569A (en) * | 2019-09-18 | 2019-12-17 | 江门市江海区长河塑胶厂有限公司 | Plastic bottle encapsulation process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1128138A2 (en) * | 2000-02-22 | 2001-08-29 | TGK Co., Ltd. | Expansion valve |
| CN2648097Y (en) * | 2003-09-17 | 2004-10-13 | 重庆宗申技术开发研究有限公司 | Petrol engine plastic air inlet divided manifold |
| CN1573078A (en) * | 2003-06-13 | 2005-02-02 | 本田技研工业株式会社 | Dual port intake device for an internal combustion engine formed by injection molding |
| CN1991159A (en) * | 2005-12-29 | 2007-07-04 | 比亚迪股份有限公司 | Method for manufacturing inlet manifold of internal combustion engine |
| CN201013497Y (en) * | 2007-03-02 | 2008-01-30 | 天津惠德汽车进气***有限公司 | Plastic induction manifold for automobile engine |
-
2014
- 2014-05-19 CN CN201410209474.7A patent/CN103991164B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1128138A2 (en) * | 2000-02-22 | 2001-08-29 | TGK Co., Ltd. | Expansion valve |
| CN1573078A (en) * | 2003-06-13 | 2005-02-02 | 本田技研工业株式会社 | Dual port intake device for an internal combustion engine formed by injection molding |
| CN2648097Y (en) * | 2003-09-17 | 2004-10-13 | 重庆宗申技术开发研究有限公司 | Petrol engine plastic air inlet divided manifold |
| CN1991159A (en) * | 2005-12-29 | 2007-07-04 | 比亚迪股份有限公司 | Method for manufacturing inlet manifold of internal combustion engine |
| CN201013497Y (en) * | 2007-03-02 | 2008-01-30 | 天津惠德汽车进气***有限公司 | Plastic induction manifold for automobile engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106945296A (en) * | 2017-04-24 | 2017-07-14 | 苏州科技大学 | Inlet manifold assembling test production system |
| CN106945296B (en) * | 2017-04-24 | 2023-08-22 | 苏州科技大学 | Intake manifold assembly test production system |
| CN110576569A (en) * | 2019-09-18 | 2019-12-17 | 江门市江海区长河塑胶厂有限公司 | Plastic bottle encapsulation process |
| CN110576569B (en) * | 2019-09-18 | 2022-01-11 | 江门市江海区长河塑胶厂有限公司 | Plastic bottle encapsulation process |
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| Publication number | Publication date |
|---|---|
| CN103991164B (en) | 2016-03-02 |
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Granted publication date: 20160302 Termination date: 20170519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |