CN101596767A - The moulding process of roller bearing retainer of railway carriage - Google Patents
The moulding process of roller bearing retainer of railway carriage Download PDFInfo
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- CN101596767A CN101596767A CN 200910148796 CN200910148796A CN101596767A CN 101596767 A CN101596767 A CN 101596767A CN 200910148796 CN200910148796 CN 200910148796 CN 200910148796 A CN200910148796 A CN 200910148796A CN 101596767 A CN101596767 A CN 101596767A
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Abstract
The present invention relates to a kind of moulding process of roller bearing retainer of railway carriage, its moulding process step is: with glass-fiber-reinforced polyamide class plastics is raw material, adopt dehumidifying heat pump to carry out drying material, particle plastic conveying and plastic with oven dry arrives in the hopper of screw plastic-injection moulding machine then, deliver in the barrel of heating through screw rod, make its melted by heating to flow regime, under high-pressure injection, molten plastic is compressed and moves forward fast, penetrate by nozzle, inject the engineering plastics cage mould, behind cooling and shaping, open mould and take out product.Technical scheme advantages of simple of the present invention, cycle of its moulding process is short and can one-shot forming, and the production process clean and safe had not only saved time but also environmental protection.
Description
Technical field
The present invention relates to be used for the retainer of passenger train roller bearing, be specifically related to a kind of moulding process of roller bearing retainer of railway carriage.
Background technology
Retainer in the rolling bearing plays multiple effect, fixing rolling element and keep suitable to each other distance to make rotation, the guiding rolling element that it can be correct enter non-load zones and damped vibration etc. from load zones, this just requires retainer to have enough intensity, toughness, wear-resistant, decay resistance and application reliability.
Railway truck bearing adopted the steel retainer originally, this retainer mainly is processed into retainer to low carbon steel plate by equipment such as punch press and lathes, and its production process has: shear, blanking, first shape, shaping, towards fabrication hole, towards fenestra, wipe away vibrations or heat treatment destressing, phosphatization etc. towards bottom outlet, pressure slope, expansion, car limit, light.Because there are problems such as running one-way, micro-crack, machining stress and quality fluctuation are big in the influence of factors such as structure, material, Sheet Metal Forming Technology, steel retainer.Adopt plate shearing machine, punch press, lathe, destressing equipment, phosphatization equipment etc. in the production, noise is big in shear and the punching production, manually-operated is dangerous big, produces industrial wastewater and the waste gas that pollution is arranged in the parkerizing process, has constituted the harm to employee and environment.Therefore, at present, engineering plastics cage has appearred on the market, this retainer has self lubricity, abrasion performance, corrosion resistance, resistance to impact, processability and reaches light-weighted characteristic well, compare with the steel retainer, this retainer exists but that mechanical strength is low, poor heat resistance, thermal coefficient of expansion is big, thermal conductivity factor low and defective such as heat ageing.And in the production forming process, there is the big problem of water imbibition height, poor stability and molding shrinkage.
Summary of the invention
The objective of the invention is at existing roller bearing retainer above shortcomings in process of production, the moulding process of the high roller bearing retainer of railway carriage of stability, the pliability of a kind of clean and safe, with short production cycle, one-shot forming and retainer is provided.
Technical scheme of the present invention is: a kind of moulding process of roller bearing retainer of railway carriage, its moulding process step is: with glass-fiber-reinforced polyamide class plastics is raw material, adopt dehumidifying heat pump to carry out drying material, particle plastic conveying and plastic with oven dry arrives in the hopper of screw plastic-injection moulding machine then, deliver in the barrel of heating through screw rod, make its melted by heating to flow regime, under high-pressure injection, molten plastic is compressed and moves forward fast, penetrate by nozzle, inject the engineering plastics cage mould, behind cooling and shaping, open mould and take out product;
Preferably, described raw material at the drying condition of dehumidifying heat pump are: 80 ℃ of temperature, and be 1-4 hour drying time;
Preferably, described barrel is heated to than the high 10-30 of plastics melting temperature ℃;
Preferably, the pressure of described high-pressure injection comprises plasticizing pressure and injection pressure, and wherein, plasticizing pressure is less than 10MPa, and injection pressure is got 80-120Mpa;
Preferably, the molding cycle of described plastics injection retainer mold cools down moulding is 40-80s;
Preferably, the product after the described injection moulding also will carry out post processing, and this post processing comprises stable the processing and the damping processing.
Beneficial effect of the present invention is: technical scheme advantages of simple of the present invention, and cycle of its moulding process is short and can one-shot forming, and the production process clean and safe had not only saved time but also environmental protection.It is raw material that moulding process of the present invention adopts glass-fiber-reinforced polyamide class plastics, is easy to moulding; Adopt the retainer of this moulding process manufacturing not only to have self lubricity, abrasion performance, corrosion resistance, resistance to impact, processability and reach light-weighted characteristic well, because raw-material mechanical property makes retainer also have higher stability, mechanical strength, pliability, simultaneously, because of raw material belongs to thermoplastic, the hear resistance of retainer improves, increase service life, and the recyclable other products that is used in again of waste material.
The specific embodiment
Specific embodiments of the invention: a kind of moulding process of roller bearing retainer of railway carriage, its moulding process step is: with glass-fiber-reinforced polyamide class plastics is raw material, adopt dehumidifying heat pump to carry out drying material, particle plastic conveying and plastic with oven dry arrives in the hopper of screw plastic-injection moulding machine then, deliver in the barrel of heating through screw rod, make its melted by heating to flow regime, under high-pressure injection, molten plastic is compressed and moves forward fast, penetrate by nozzle, inject the engineering plastics cage mould, behind cooling and shaping, open mould and take out product.
Its concrete moulding process step is as follows:
(1) raw material drying
Because of containing hydrophilic amide groups, moisture absorption easily is a kind of hygroscopicity plastics to glass-fiber-reinforced polyamide class plastics (nylon) in molecular structure.When moisture is high, can causes in the moulding that melt viscosity descends, thereby make product surface defectives such as bubble, color and luster inequality, flow liner occur, influence the outward appearance of product.Too high or too low moisture content all can have influence on the flowability of material, thereby makes the mechanical strength of goods the serviceability that fluctuation on a large scale has influence on product occur.In order to guarantee smooth moulding, must carry out drying to nylon material before the moulding and handle, adopt with dehumidifying heat pump under 80 ℃ of situations of temperature, dry 1-4 hour, moisture is dropped to below 0.2%.
(2) injection moulding
1. heating cylinder
Barrel to the screw plastic-injection moulding machine heats, and the particle plastic conveying and plastic of drying is arrived in the hopper of make-up machine, delivers in the barrel of heating through screw rod, makes its melted by heating to flow regime.The distribution of barrel temperature only should progressively raise from hopper one side (rear end) to nozzle (front end), so that the plastics temperature rises reposefully, reaches the purpose of even plasticizing.Barrel temperature determines that according to the fusing point of plastics barrel temperature is than the high 10-30 of plastics fusing point ℃.
2. high-pressure injection
Under high-pressure injection, molten plastic is compressed and moves forward fast, is penetrated by nozzle.When the plastics of fusion were penetrated by nozzle, nozzle temperature was less than the maximum temperature of barrel.
Pressure in the process of injection molding comprises two kinds of plasticizing pressure and injection pressures, and these pressure all directly influence the plasticizing and the Products Quality of plastics.Suffered pressure was called plasticizing pressure when screw rod top melt retreated in the screw rod rotation, also claimed back pressure.Concerning nylon, plasticizing pressure must be lower, otherwise fusion rate is with very fast reduction, so get plasticizing pressure in this process of injection molding less than 10MPa.
Injection pressure is the pressure of plastics being executed with screw rod top unit are.Its effect is: the plastics that promote in the barrel move forward, and plastics are mixed and plasticizing; Make plastics obtain enough filling mold speed and length of flow, make plastics before cooling, be full of die cavity; The plastics of packing stage injection pressure in should be able to the compacting die cavity, and plastics are carried out feed supplement because of the contraction that cooling produces make goods keep accurate shape and obtain required performance.Injection pressure in this forming process is got 80～120MPa.
3. cooling forming
The molten plastic of nozzle ejection injects the engineering plastics cage mould, behind cooling and shaping, opens mould and takes out product.Because mold temperature is very big to the internal performance of plastic products and surface quality influence,, goes bail for and hold shut die tool temperature and remain on 80-100 ℃ at this.Finishing the required time of shot forming process is called molding cycle.It mainly comprises inject time and cool time, and for the quality that guarantees product and shorten molding cycle as far as possible, the molding cycle of retainer is got in this forming process: 40-80s.
(3) post processing
After the engineering plastics cage injection moulding, the needs according to product uses will carry out appropriate postprocessing, so as to improving the performance of product.
1. stable the processing
The stable essence of handling is: it is loose that the strand that is compelled to freeze is obtained, thereby eliminate this a part of internal stress; Improve degree of crystallinity, the stable crystalline structure, the elastic modelling quantity and the hardness of raising engineering plastics cage reduce elongation at break, stable dimensions.The stable temperature of handling should be greater than the bearing limit of working temperature (120 ℃) more than 20 ℃.
2. damping is handled
The pliability and the impact strength that can improve engineering plastics cage handled in damping, eliminates internal stress and stable dimensions.Its process conditions are after engineering plastics cage is put into 95 ℃ of water and boiled 1-2h, to slowly cool to room temperature and take out, also can adopt other method moisture absorptions such as steam.
When under higher temperature, using, need retainer that dimensional stability is preferably arranged, should stablize processing.In the use, as require to improve engineering plastics cage toughness and should carry out damping and handle.Engineering plastics cage applying working condition condition is better, and post processing can not be carried out in no specific (special) requirements.
Claims (6)
1. the moulding process of a roller bearing retainer of railway carriage, it is characterized in that: its moulding process step is: with glass-fiber-reinforced polyamide class plastics is raw material, adopt dehumidifying heat pump to carry out drying material, particle plastic conveying and plastic with oven dry arrives in the hopper of screw plastic-injection moulding machine then, deliver in the barrel of heating through screw rod, make its melted by heating to flow regime, under high-pressure injection, molten plastic is compressed and moves forward fast, penetrate by nozzle, inject the engineering plastics cage mould, behind cooling and shaping, open mould and take out product.
2. the moulding process of roller bearing retainer of railway carriage as claimed in claim 1, it is characterized in that: described raw material at the drying condition of dehumidifying heat pump are: 80 ℃ of temperature, be 1-4 hour drying time.
3. the moulding process of roller bearing retainer of railway carriage as claimed in claim 1, it is characterized in that: described barrel is heated to than the high 10-30 of plastics melting temperature ℃.
4. the moulding process of roller bearing retainer of railway carriage as claimed in claim 1 is characterized in that: the pressure of described high-pressure injection comprises plasticizing pressure and injection pressure, and wherein, plasticizing pressure is less than 10MPa, and injection pressure is got 80-120MPa.
5. the moulding process of roller bearing retainer of railway carriage as claimed in claim 1 is characterized in that: the molding cycle that described plastics inject the moulding of retainer mold cools down is 40-80s.
6. the moulding process of roller bearing retainer of railway carriage as claimed in claim 1, it is characterized in that: the product after the described injection moulding also will carry out post processing, and this post processing comprises stable the processing and the damping processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910148796 CN101596767A (en) | 2009-07-06 | 2009-07-06 | The moulding process of roller bearing retainer of railway carriage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910148796 CN101596767A (en) | 2009-07-06 | 2009-07-06 | The moulding process of roller bearing retainer of railway carriage |
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| CN101596767A true CN101596767A (en) | 2009-12-09 |
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| CN 200910148796 Pending CN101596767A (en) | 2009-07-06 | 2009-07-06 | The moulding process of roller bearing retainer of railway carriage |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407589A (en) * | 2010-09-25 | 2012-04-11 | 上海浦东美灵塑料制品有限公司 | Cover plate injection molding technology of ABS (Acrylonitrile Butadiene Styrene) plastic washing machine |
| CN102407587A (en) * | 2010-09-25 | 2012-04-11 | 上海浦东美灵塑料制品有限公司 | Injection molding process for polyphenylene oxide (PPO) plastic air conditioner shell |
| CN102862259A (en) * | 2011-07-08 | 2013-01-09 | 昆山瑞华电器有限公司 | Non-metal material motor gearbox |
| CN104004354A (en) * | 2014-06-17 | 2014-08-27 | 增城华昌塑料五金模具有限公司 | Injection moulding method of long glass fiber reinforced nylon 66 materials |
| CN105643863A (en) * | 2014-11-14 | 2016-06-08 | 中国科学院金属研究所 | Injection-molding preparation method for plastic angular contact ball bearing retainer and special mold for injection-molding preparation method |
| CN105782238A (en) * | 2016-04-21 | 2016-07-20 | 浙江天马轴承有限公司 | Radial and axial composite cylindrical roller bearing |
| CN107415137A (en) * | 2017-05-04 | 2017-12-01 | 泰逸电子（昆山）有限公司 | A kind of preparation technology of notebook host bonnet |
| CN110757724A (en) * | 2019-10-14 | 2020-02-07 | 常州苏特轴承制造有限公司 | Production process of nylon injection molding retainer with framework and retainer prepared by production process |
| CN112571747A (en) * | 2019-09-28 | 2021-03-30 | 无锡市锡珠保持架有限公司 | Plastic retainer production line and technology |
| CN112659453A (en) * | 2019-09-28 | 2021-04-16 | 无锡市锡珠保持架有限公司 | Plastic retainer production line |
| CN114643678A (en) * | 2020-12-17 | 2022-06-21 | 东风(十堰)林泓汽车配套件有限公司 | Production method of vehicle fender |
-
2009
- 2009-07-06 CN CN 200910148796 patent/CN101596767A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407587A (en) * | 2010-09-25 | 2012-04-11 | 上海浦东美灵塑料制品有限公司 | Injection molding process for polyphenylene oxide (PPO) plastic air conditioner shell |
| CN102407587B (en) * | 2010-09-25 | 2014-03-05 | 上海浦东美灵塑料制品有限公司 | Injection molding process for polyphenylene oxide (PPO) plastic air conditioner shell |
| CN102407589B (en) * | 2010-09-25 | 2014-03-05 | 上海浦东美灵塑料制品有限公司 | Cover plate injection molding technology of ABS (Acrylonitrile Butadiene Styrene) plastic washing machine |
| CN102407589A (en) * | 2010-09-25 | 2012-04-11 | 上海浦东美灵塑料制品有限公司 | Cover plate injection molding technology of ABS (Acrylonitrile Butadiene Styrene) plastic washing machine |
| CN102862259A (en) * | 2011-07-08 | 2013-01-09 | 昆山瑞华电器有限公司 | Non-metal material motor gearbox |
| CN104004354B (en) * | 2014-06-17 | 2016-08-24 | 增城华昌塑料五金模具有限公司 | A kind of injection molding forming method of long glass fiber reinforced nylon 66 material |
| CN104004354A (en) * | 2014-06-17 | 2014-08-27 | 增城华昌塑料五金模具有限公司 | Injection moulding method of long glass fiber reinforced nylon 66 materials |
| CN105643863A (en) * | 2014-11-14 | 2016-06-08 | 中国科学院金属研究所 | Injection-molding preparation method for plastic angular contact ball bearing retainer and special mold for injection-molding preparation method |
| CN105782238A (en) * | 2016-04-21 | 2016-07-20 | 浙江天马轴承有限公司 | Radial and axial composite cylindrical roller bearing |
| CN107415137A (en) * | 2017-05-04 | 2017-12-01 | 泰逸电子（昆山）有限公司 | A kind of preparation technology of notebook host bonnet |
| CN112571747A (en) * | 2019-09-28 | 2021-03-30 | 无锡市锡珠保持架有限公司 | Plastic retainer production line and technology |
| CN112659453A (en) * | 2019-09-28 | 2021-04-16 | 无锡市锡珠保持架有限公司 | Plastic retainer production line |
| CN112571747B (en) * | 2019-09-28 | 2022-06-28 | 无锡市锡珠保持架有限公司 | Plastic retainer production line and process |
| CN110757724A (en) * | 2019-10-14 | 2020-02-07 | 常州苏特轴承制造有限公司 | Production process of nylon injection molding retainer with framework and retainer prepared by production process |
| CN114643678A (en) * | 2020-12-17 | 2022-06-21 | 东风(十堰)林泓汽车配套件有限公司 | Production method of vehicle fender |
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Application publication date: 20091209 |