CN114248390A - Injection molding processing technology of refrigerator freezing drawer - Google Patents
Injection molding processing technology of refrigerator freezing drawer Download PDFInfo
- Publication number
- CN114248390A CN114248390A CN202111363487.6A CN202111363487A CN114248390A CN 114248390 A CN114248390 A CN 114248390A CN 202111363487 A CN202111363487 A CN 202111363487A CN 114248390 A CN114248390 A CN 114248390A
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- injection
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- stage injection
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 26
- 238000005516 engineering process Methods 0.000 title claims abstract description 9
- 238000007710 freezing Methods 0.000 title claims description 13
- 230000008014 freezing Effects 0.000 title claims description 13
- 238000002347 injection Methods 0.000 claims abstract description 100
- 239000007924 injection Substances 0.000 claims abstract description 100
- 239000002994 raw material Substances 0.000 claims abstract description 56
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 14
- 239000000155 melt Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000004793 Polystyrene Substances 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000004806 packaging method and process Methods 0.000 claims abstract description 7
- 229920002223 polystyrene Polymers 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The application discloses refrigerator freezer drawer's injection moulding process technology in refrigerator freezer drawer processing technology field includes following step: selecting materials: selecting high-quality polystyrene as a raw material, and then cleaning the raw material to remove dust and impurities on the surface of the raw material; and (3) drying: drying the raw materials cleaned in the step one to ensure that the raw materials do not contain moisture; softening: heating and softening the raw material dried in the step two; first-stage injection: the first-stage injection metering is 60-90 mm when raw materials are injected, the injection pressure is 60-90 MPa, the injection speed is 55-85 mm/s, the melt temperature is 190' 220 ℃ when raw materials are injected, and the raw materials are cooled for 10-22 seconds after the first-stage injection is finished; and (3) secondary injection: after the cooling time of the first-stage injection molding is finished, starting second-stage injection, wherein the second-stage injection rate is 20-50 mm/s; taking a workpiece: and after the two-stage injection is finished and the cooling is finished, taking out the molded drawer and then packaging. This scheme is in order to reduce product warpage deflection and weld mark size.
Description
Technical Field
The invention relates to the technical field of refrigerator freezing drawer processing, in particular to an injection molding processing technology of a refrigerator freezing drawer.
Background
With the rapid development of industrial technology, the application range of plastics is wider and wider, and in the household electrical industry, high polymer materials become second raw materials only to steel and are the fastest-developing materials in recent years, and the average growth rate is about 30%. Most of the polymer materials for household appliances are thermoplastic polymer materials, accounting for about 90%. Meanwhile, with the improvement of the living standard of people, the requirements of consumers on the quality of household appliances are not met in simple service performance, and higher requirements on appearance and visual effect are provided. The quality of plastic parts of household appliances is influenced by a plurality of factors, and warping deformation and weld marks are one of the main reasons for reducing the quality of the plastic products. Warpage deformation is the shape of the injection shape deviating from the mold cavity, which directly affects the dimensional accuracy of the plastic part; weld marks are the incomplete fusion of two or more melts when they meet, creating linear grooves at the junction that directly affect the appearance and mechanical properties of the plastic product. Therefore, a process for manufacturing a refrigerator freezer drawer capable of reducing the warpage and the weld marks of the product is needed.
Disclosure of Invention
The invention aims to provide a processing technology of a refrigerator freezing drawer by using an injection molding processing technology of the refrigerator freezing drawer so as to reduce the warping deformation and the size of a welding mark of a product.
In order to solve the technical problems, the invention provides the following technical scheme: an injection molding process for a refrigerator freezing drawer comprises the following steps:
step one, selecting materials: selecting high-quality polystyrene as a raw material, and then cleaning the raw material to remove dust and impurities on the surface of the raw material;
step two, drying: drying the raw materials cleaned in the step one to ensure that the raw materials do not contain moisture;
step three, softening: heating and softening the raw material dried in the step two;
step four, first-stage injection: the first-stage injection metering is 60-90 mm when raw materials are injected, the injection pressure is 60-90 MPa, the injection speed is 55-85 mm/s, the melt temperature is 190' 220 ℃ when raw materials are injected, and the raw materials are cooled for 10-22 seconds after the first-stage injection is finished;
step five, two-stage injection: after the cooling time of the first-stage injection molding is finished, starting second-stage injection, wherein the second-stage injection rate is 20-50 mm/s;
step six, taking a part: and after the two-stage injection is finished and the cooling is finished, taking out the molded drawer and then packaging.
The invention has the following working principle and beneficial effects: according to the invention, the buckling deformation (delta is less than or equal to 1.0mm) and the size of a weld mark (L is less than or equal to 2mm) are selected as control indexes, and according to theoretical analysis, three molding process parameters of a first-stage injection dosage, a second-stage injection rate and cooling time are selected as control factors aiming at the buckling deformation, and different values are set, namely a three-factor four level; aiming at the weld mark, the three molding process parameters of a section of injection rate, a section of melt temperature and a section of injection pressure are selected as control factors by combining empirical analysis, so that the processed refrigerator freezing drawer has small weld mark and the weld mark is greatly improved.
Furthermore, the injection metering in the fourth stage of the step is 70mm, the injection pressure is 70MPa, the injection rate is 65mm/s, the melt temperature during injection is 200 ℃, and the cooling is carried out for 14s after the first stage of injection is finished.
Furthermore, the injection metering in the fourth stage of the step is 80mm, the injection pressure is 80MPa, the injection rate is 75mm/s, the melt temperature during injection is 210 ℃, and the cooling is carried out for 18s after the first stage of injection is finished.
Further, the second stage injection rate in the fifth step is 30 mm/s.
Further, the second stage injection rate in the fifth step is 40 mm/s.
Detailed Description
Example 1
An injection molding process for a refrigerator freezing drawer comprises the following steps:
step one, selecting materials: selecting high-quality polystyrene as a raw material, and then cleaning the raw material to remove dust and impurities on the surface of the raw material;
step two, drying: drying the raw materials cleaned in the step one to ensure that the raw materials do not contain moisture;
step three, softening: heating and softening the raw material dried in the step two;
step four, first-stage injection: when raw material injection is carried out, the first-stage injection metering is 60mm, the injection pressure is 60MPa, the injection rate is 55mm/s, the melt temperature is 190 ℃ when injection is carried out, and the first-stage injection is cooled for 10 seconds after completion;
step five, two-stage injection: after the cooling time of the first injection molding is finished, the second injection is started, and the second injection rate is 20 mm/s;
step six, taking a part: and after the two-stage injection is finished and the cooling is finished, taking out the molded drawer and then packaging.
Example 2
An injection molding process for a refrigerator freezing drawer comprises the following steps:
step one, selecting materials: selecting high-quality polystyrene as a raw material, and then cleaning the raw material to remove dust and impurities on the surface of the raw material;
step two, drying: drying the raw materials cleaned in the step one to ensure that the raw materials do not contain moisture;
step three, softening: heating and softening the raw material dried in the step two;
step four, first-stage injection: when raw material injection is carried out, the first-stage injection metering is 70mm, the injection pressure is 70MPa, the injection rate is 65mm/s, the melt temperature is 200 ℃ when injection is carried out, and the first-stage injection is cooled for 14 seconds after completion;
step five, two-stage injection: after the cooling time of the first injection molding is finished, the second injection is started, and the second injection rate is 30 mm/s;
step six, taking a part: and after the two-stage injection is finished and the cooling is finished, taking out the molded drawer and then packaging.
Example 3
An injection molding process for a refrigerator freezing drawer comprises the following steps:
step one, selecting materials: selecting high-quality polystyrene as a raw material, and then cleaning the raw material to remove dust and impurities on the surface of the raw material;
step two, drying: drying the raw materials cleaned in the step one to ensure that the raw materials do not contain moisture;
step three, softening: heating and softening the raw material dried in the step two;
step four, first-stage injection: when raw material injection is carried out, the first-stage injection metering is 80mm, the injection pressure is 80MPa, the injection rate is 75mm/s, the melt temperature is 210 ℃ when injection is carried out, and the first-stage injection is cooled for 18 seconds after completion;
step five, two-stage injection: after the cooling time of the first injection molding is finished, the second injection is started, and the second injection rate is 40 mm/s;
step six, taking a part: and after the two-stage injection is finished and the cooling is finished, taking out the molded drawer and then packaging.
Example 4
An injection molding process for a refrigerator freezing drawer comprises the following steps:
step one, selecting materials: selecting high-quality polystyrene as a raw material, and then cleaning the raw material to remove dust and impurities on the surface of the raw material;
step two, drying: drying the raw materials cleaned in the step one to ensure that the raw materials do not contain moisture;
step three, softening: heating and softening the raw material dried in the step two;
step four, first-stage injection: when raw material injection is carried out, the first-stage injection metering is 90mm, the injection pressure is 90MPa, the injection rate is 85mm/s, the melt temperature is 220 ℃ when injection is carried out, and the first-stage injection is cooled for 22 seconds after completion;
step five, two-stage injection: after the cooling time of the first injection molding is finished, the second injection is started, and the second injection rate is 50 mm/s;
step six, taking a part: and after the two-stage injection is finished and the cooling is finished, taking out the molded drawer and then packaging.
Claims (5)
1. An injection molding processing technology of a refrigerator freezing drawer is characterized by comprising the following steps:
step one, selecting materials: selecting high-quality polystyrene as a raw material, and then cleaning the raw material to remove dust and impurities on the surface of the raw material;
step two, drying: drying the raw materials cleaned in the step one to ensure that the raw materials do not contain moisture;
step three, softening: heating and softening the raw material dried in the step two;
step four, first-stage injection: the first-stage injection metering is 60-90 mm when raw materials are injected, the injection pressure is 60-90 MPa, the injection speed is 55-85 mm/s, the melt temperature is 190' 220 ℃ when raw materials are injected, and the raw materials are cooled for 10-22 seconds after the first-stage injection is finished;
step five, two-stage injection: after the cooling time of the first-stage injection molding is finished, starting second-stage injection, wherein the second-stage injection rate is 20-50 mm/s;
step six, taking a part: and after the two-stage injection is finished and the cooling is finished, taking out the molded drawer and then packaging.
2. The injection molding process of the refrigerator freezer drawer according to claim 1, wherein the injection molding process comprises the following steps: the injection metering of the first section in the fourth step is 70mm, the injection pressure is 70MPa, the injection rate is 65mm/s, the melt temperature during injection is 200 ℃, and the cooling is carried out for 14s after the first section injection is finished.
3. The injection molding process of the refrigerator freezer drawer according to claim 2, wherein the injection molding process comprises the following steps: the injection metering of the first section in the fourth step is 80mm, the injection pressure is 80MPa, the injection rate is 75mm/s, the melt temperature during injection is 210 ℃, and the cooling is carried out for 18s after the first section injection is finished.
4. The injection molding process of the refrigerator freezer drawer according to claim 3, wherein the injection molding process comprises the following steps: and in the fifth step, the second-stage injection rate is 30 mm/s.
5. The injection molding process of the refrigerator freezer drawer according to claim 4, wherein the injection molding process comprises the following steps: and in the fifth step, the second-stage injection rate is 40 mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111363487.6A CN114248390A (en) | 2021-11-17 | 2021-11-17 | Injection molding processing technology of refrigerator freezing drawer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111363487.6A CN114248390A (en) | 2021-11-17 | 2021-11-17 | Injection molding processing technology of refrigerator freezing drawer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114248390A true CN114248390A (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111363487.6A Pending CN114248390A (en) | 2021-11-17 | 2021-11-17 | Injection molding processing technology of refrigerator freezing drawer |
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| Country | Link |
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| CN (1) | CN114248390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115157538A (en) * | 2022-05-24 | 2022-10-11 | 遵义群建塑胶制品有限公司 | Processing technology for preparing connector cover from polyether-ether-ketone |
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| CN102107487A (en) * | 2010-11-23 | 2011-06-29 | 武汉市今晨实业有限公司 | Method for producing brush holder of tooth brush |
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| CN106476232A (en) * | 2016-09-29 | 2017-03-08 | 广西大学 | The Shooting Technique of ABS material spoiler |
| CN106881843A (en) * | 2017-02-21 | 2017-06-23 | 中发电气（铜陵）海德精密工业有限公司 | The moulding process of polypropylene seal part |
| CN107443658A (en) * | 2017-07-27 | 2017-12-08 | 苏州市海铂橡塑五金制品有限公司 | A kind of injection molding technique of multistage shaping |
| CN111319185A (en) * | 2020-03-23 | 2020-06-23 | 德红柜智能科技(厦门)有限公司 | Preparation method of high-barrier and high-swelling-resistance lithium ion battery shell |
-
2021
- 2021-11-17 CN CN202111363487.6A patent/CN114248390A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107487A (en) * | 2010-11-23 | 2011-06-29 | 武汉市今晨实业有限公司 | Method for producing brush holder of tooth brush |
| CN106113429A (en) * | 2016-06-27 | 2016-11-16 | 芜湖恒信汽车内饰制造有限公司 | A kind of Shooting Technique of PP LGF30 material battery carrier |
| CN106476232A (en) * | 2016-09-29 | 2017-03-08 | 广西大学 | The Shooting Technique of ABS material spoiler |
| CN106881843A (en) * | 2017-02-21 | 2017-06-23 | 中发电气（铜陵）海德精密工业有限公司 | The moulding process of polypropylene seal part |
| CN107443658A (en) * | 2017-07-27 | 2017-12-08 | 苏州市海铂橡塑五金制品有限公司 | A kind of injection molding technique of multistage shaping |
| CN111319185A (en) * | 2020-03-23 | 2020-06-23 | 德红柜智能科技(厦门)有限公司 | Preparation method of high-barrier and high-swelling-resistance lithium ion battery shell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115157538A (en) * | 2022-05-24 | 2022-10-11 | 遵义群建塑胶制品有限公司 | Processing technology for preparing connector cover from polyether-ether-ketone |
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