CN113942167A - Injection molding process of bearing plastic retainer - Google Patents
Injection molding process of bearing plastic retainer Download PDFInfo
- Publication number
- CN113942167A CN113942167A CN202111193554.4A CN202111193554A CN113942167A CN 113942167 A CN113942167 A CN 113942167A CN 202111193554 A CN202111193554 A CN 202111193554A CN 113942167 A CN113942167 A CN 113942167A
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- Prior art keywords
- injection molding
- molding process
- injection
- temperature
- drying
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- 229920003023 plastic Polymers 0.000 title claims abstract description 32
- 239000004033 plastic Substances 0.000 title claims abstract description 32
- 238000001746 injection moulding Methods 0.000 title claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000001291 vacuum drying Methods 0.000 claims abstract description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 21
- 239000004917 carbon fiber Substances 0.000 claims description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 18
- 229920003189 Nylon 4,6 Polymers 0.000 claims description 14
- 239000000155 melt Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 18
- 238000000465 moulding Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000003365 glass fiber Substances 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 125000003368 amide group Chemical group 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/04—Bearings
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Rolling Contact Bearings (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
本发明公开了一种轴承塑料保持架注塑工艺，包括以下操作步骤：按照保持架型号选择所需要的注塑模具，注塑过程中原料预处理干燥方式采用真空干燥。在注塑成型阶段，根据具体的材料对模具温度、熔体温度、注射时间、冷却时间和保压压力进行相应的设置，最后进行保持架热处理，通过上述方式，本发明能够将塑料保持架通过注塑成型工艺，将固定尺寸的塑料保持架运用注塑模具进行成型注塑，能够在有效的提高生产效率的同时提高产品的质量。
The invention discloses an injection molding process for a bearing plastic cage, which includes the following operation steps: selecting a required injection mold according to the cage model, and vacuum drying is used for raw material pretreatment and drying in the injection molding process. In the injection molding stage, the mold temperature, melt temperature, injection time, cooling time and holding pressure are set correspondingly according to the specific material, and finally the cage is heat treated. Through the above method, the present invention can make the plastic cage through injection molding. In the molding process, the plastic cage with a fixed size is molded by an injection mold, which can effectively improve the production efficiency and improve the quality of the product.
Description
Technical Field
The invention relates to the technical field of bearing manufacturing.
Background
A series of problems such as abrasion, high noise and the like can occur in the using process of a conventional nylon 46+ Glass Fiber (GF) reinforcing retainer, and meanwhile, the plastic retainer is formed in one step by injection molding and is produced in batch, so that the plastic retainer is an injection molding part which has high requirement precision and a complex shape. The plastic retainer injection molding quality is influenced by a plurality of process factors, such as mold temperature, melt temperature, injection pressure, injection time, pressure maintaining pressure and the like, and the control on the process parameter values in the whole molding period is crucial in order to reduce the quality defects of the plastic retainer and improve the production quality.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an injection molding process of a bearing plastic retainer, which is convenient and quick to process, simple in steps and capable of effectively improving the product quality.
In order to achieve the aim, the invention provides an injection molding process of a plastic bearing retainer, which comprises the following steps,
step one, selecting a required injection mold according to the type of the retainer;
selecting nylon 46+ Carbon Fiber (CF) plastics as raw materials, and drying the raw materials, wherein the drying temperature is set to be 100 ℃, and the drying is continued for 3 to 5 hours;
injecting the raw materials into a mold, wherein the temperature of the mold is controlled to be 75-90 ℃, the temperature of the melt is controlled to be 275-305 ℃, the injection time is 2.0-3.5s, the cooling time is 15-30s, and the pressure maintaining pressure is 40-55 MPa;
and step four, carrying out heat treatment on the molded material, wherein the heat treatment temperature is set to be 120 ℃, and the time is 4-6 h.
As a further arrangement of the invention, the carbon fiber plastic is selected to be 10CF, 20CF or 30 CF.
As a further configuration of the invention, the step of drying the raw material is vacuum drying.
As a further arrangement of the invention, in the fourth step, a hot air circulation oven is selected for heat treatment.
The beneficial effect who so sets up is: according to the invention, the plastic retainer is molded and injected by an injection mold through an injection molding process, so that the filler composition and the specific process parameters in the processing process are optimized, the wear resistance of the retainer is improved, the bearing noise is reduced, and the problems of abrasion and noise rise of the retainer due to dry friction in a poor lubrication state or an oil-poor state are solved.
Drawings
FIG. 1 is a block flow diagram of an embodiment of the present invention.
Detailed Description
The technological process of the injection molding process of the plastic retainer of the bearing is shown in figure 1.
The first embodiment of the invention:
a production process of a nylon plastic retainer comprises the following steps:
(1) selecting a required injection mold according to the type of the retainer;
(2) the raw material drying mode is vacuum drying, the drying temperature is 100 ℃, the time is generally 3-5h, and the water content of the material is ensured to be less than or equal to 0.05 percent;
(3) in the injection molding stage, the technological parameters such as the mold temperature, the melt temperature, the injection time, the cooling time, the pressure maintaining time, the pressure and the like are correspondingly set according to specific materials;
(4) finally, carrying out forming heat treatment at 120 ℃ for 4-6 h.
In contrast to the prior art, in one embodiment, preferably, the temperature of the mold is controlled at 80 ℃, the melt temperature is controlled at 275 ℃, the injection time is 2.5s, the cooling time is 15s, and the dwell pressure is 55 MPa. Under this condition, the nylon 46+10 Carbon Fiber (CF) material is selected for molding.
Preferably, the nylon 46+10 Carbon Fiber (CF) material is dried in a vacuum manner. Because the amide group is sensitive to oxygen and is easy to generate oxidative discoloration at high temperature, the drying method adopts vacuum drying, and has high dehydration rate, short drying time and good quality of dried raw materials.
Preferably, the temperature of the heat treatment process of the nylon 46+10 carbon fiber retainer is 120 ℃, and the heat treatment process is carried out in a hot air circulation oven. The original liquid medium treatment mode is replaced, and the process of cleaning and drying the plastic part is omitted. The heat treatment after the material molding aims to eliminate the internal stress in the plastic part and avoid the influence of stress concentration on the service performance of the material.
Embodiment two of the present invention:
a production process of a nylon plastic retainer comprises the following steps:
(1) selecting a required injection mold according to the type of the retainer;
(2) the raw material drying mode is vacuum drying, the drying temperature is 100 ℃, the time is generally 3-5h, and the water content of the material is ensured to be less than or equal to 0.05 percent;
(3) in the injection molding stage, the technological parameters such as the mold temperature, the melt temperature, the injection time, the cooling time, the pressure maintaining time, the pressure and the like are correspondingly set according to specific materials;
(4) finally, carrying out forming heat treatment at 110 ℃ for 4-6 h.
In contrast to the prior art, in one embodiment, preferably, the temperature of the mold is controlled at 85 ℃, the melt temperature is controlled at 280 ℃, the injection time is 3.0s, the cooling time is 20s, and the dwell pressure is 60 MPa. Under this condition, the nylon 46+20 carbon fiber (GF) material is selected for molding.
Preferably, the nylon 46+20 carbon fiber (GF) raw material is dried in vacuum. Because the amide group is sensitive to oxygen and is easy to generate oxidative discoloration at high temperature, the drying method adopts vacuum drying, and has high dehydration rate, short drying time and good quality of dried raw materials.
Preferably, the temperature of the heat treatment process of the nylon 46+20 carbon fiber retainer is 120 ℃, and the heat treatment process is carried out in a hot air circulation oven. The original liquid medium treatment mode is replaced, and the process of cleaning and drying the plastic part is omitted. The heat treatment after the material molding aims to eliminate the internal stress in the plastic part and avoid the influence of stress concentration on the service performance of the material.
The third embodiment of the invention:
a production process of a nylon plastic retainer comprises the following steps:
(1) selecting a required injection mold according to the type of the retainer;
(2) the raw material drying mode is vacuum drying, the drying temperature is 100 ℃, the time is generally 3-5h, and the water content of the material is ensured to be less than or equal to 0.05 percent;
(3) in the injection molding stage, the technological parameters such as the mold temperature, the melt temperature, the injection time, the cooling time, the pressure maintaining time, the pressure and the like are correspondingly set according to specific materials;
(4) finally, carrying out forming heat treatment at 120 ℃ for 4-6 h.
In contrast to the prior art, in one embodiment, preferably, the temperature of the mold is controlled at 90 ℃, the melt temperature is controlled at 285 ℃, the injection time is 3.5s, the cooling time is 25s, and the dwell pressure is 65 MPa. Under this condition, the nylon 46+30 Carbon Fiber (CF) material is selected for molding.
Preferably, the nylon 46+30 Carbon Fiber (CF) raw material is dried in vacuum. Because the amide group is sensitive to oxygen and is easy to generate oxidative discoloration at high temperature, the drying method adopts vacuum drying, and has high dehydration rate, short drying time and good quality of dried raw materials.
Preferably, the temperature of the heat treatment process of the nylon 46+30 carbon fiber retainer is 120 ℃, and the heat treatment process is carried out in a hot air circulation oven. The original liquid medium treatment mode is replaced, and the process of cleaning and drying the plastic part is omitted. The heat treatment after the material molding aims to eliminate the internal stress in the plastic part and avoid the influence of stress concentration on the service performance of the material.
According to the invention, the nylon 46+ carbon fibers with different proportions are specifically arranged, the plastic retainer is subjected to injection molding by an injection molding process, and the nylon 46+ carbon fiber plastic retainer with different proportions is subjected to injection molding by using an injection mold, so that the defects of the prior art are overcome, the product quality and stability are improved, the wear resistance of the retainer is enhanced, and the bearing noise is reduced. The data for the three examples are summarized as follows:
the above example is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111193554.4A CN113942167A (en) | 2021-10-13 | 2021-10-13 | Injection molding process of bearing plastic retainer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111193554.4A CN113942167A (en) | 2021-10-13 | 2021-10-13 | Injection molding process of bearing plastic retainer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113942167A true CN113942167A (en) | 2022-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111193554.4A Pending CN113942167A (en) | 2021-10-13 | 2021-10-13 | Injection molding process of bearing plastic retainer |
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| Country | Link |
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| CN (1) | CN113942167A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5866647A (en) * | 1994-04-15 | 1999-02-02 | Dana Corporation | Polymeric based composite bearing |
| CN102115558A (en) * | 2010-12-29 | 2011-07-06 | 四川大学 | High-conductivity polymer carbon nanotube composite material and micro-processing method thereof |
| CN102796378A (en) * | 2012-08-24 | 2012-11-28 | 人本集团有限公司 | Bearing holding frame and preparation method thereof |
| CN104960143A (en) * | 2015-05-26 | 2015-10-07 | 上海圣甲安全防护科技有限公司 | Injection-molded flexible stab-resistant composite material and preparation method thereof |
| CN105585840A (en) * | 2014-11-14 | 2016-05-18 | 中国科学院金属研究所 | Nylon composite material bearing retainer and preparation method thereof |
| CN106828532A (en) * | 2016-12-29 | 2017-06-13 | 株洲时代新材料科技股份有限公司 | City rail vehicle lightweight drawing pull bar |
| CN107387616A (en) * | 2017-08-08 | 2017-11-24 | 长沙五犇新材料科技有限公司 | One kind friction layer material |
| CN110576561A (en) * | 2019-09-25 | 2019-12-17 | 博戈橡胶塑料（株洲）有限公司 | Manufacturing method of lightweight connecting rod with rubber metal spherical hinge |
| CN112848389A (en) * | 2020-12-21 | 2021-05-28 | 中南大学 | Method for rapidly forming hybrid fiber reinforced thermoplastic composite structure |
-
2021
- 2021-10-13 CN CN202111193554.4A patent/CN113942167A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5866647A (en) * | 1994-04-15 | 1999-02-02 | Dana Corporation | Polymeric based composite bearing |
| CN102115558A (en) * | 2010-12-29 | 2011-07-06 | 四川大学 | High-conductivity polymer carbon nanotube composite material and micro-processing method thereof |
| CN102796378A (en) * | 2012-08-24 | 2012-11-28 | 人本集团有限公司 | Bearing holding frame and preparation method thereof |
| CN105585840A (en) * | 2014-11-14 | 2016-05-18 | 中国科学院金属研究所 | Nylon composite material bearing retainer and preparation method thereof |
| CN104960143A (en) * | 2015-05-26 | 2015-10-07 | 上海圣甲安全防护科技有限公司 | Injection-molded flexible stab-resistant composite material and preparation method thereof |
| CN106828532A (en) * | 2016-12-29 | 2017-06-13 | 株洲时代新材料科技股份有限公司 | City rail vehicle lightweight drawing pull bar |
| CN107387616A (en) * | 2017-08-08 | 2017-11-24 | 长沙五犇新材料科技有限公司 | One kind friction layer material |
| CN110576561A (en) * | 2019-09-25 | 2019-12-17 | 博戈橡胶塑料（株洲）有限公司 | Manufacturing method of lightweight connecting rod with rubber metal spherical hinge |
| CN112848389A (en) * | 2020-12-21 | 2021-05-28 | 中南大学 | Method for rapidly forming hybrid fiber reinforced thermoplastic composite structure |
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Application publication date: 20220118 |