CN112810018A - Method for foaming and molding expandable plastic particles by microwave heating - Google Patents
Method for foaming and molding expandable plastic particles by microwave heating Download PDFInfo
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- CN112810018A CN112810018A CN201911123924.XA CN201911123924A CN112810018A CN 112810018 A CN112810018 A CN 112810018A CN 201911123924 A CN201911123924 A CN 201911123924A CN 112810018 A CN112810018 A CN 112810018A
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- mold
- foaming
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- microwave
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3415—Heating or cooling
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0855—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using microwave
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a method for foaming and molding expandable plastic particles by microwave heating, which comprises the following steps of 1) feeding a mold and adding liquid, wherein a material injection gun is used for injecting raw materials and liquid into a cavity of the mold by using compressed air, and the mold is made of plastic high-temperature-resistant insulating materials; 2) heating and foaming, namely configuring a microwave shielding cover and a microwave generator outside a mold cavity, and sending microwaves into the mold cavity through the microwave generator to heat and vaporize liquid in the mold cavity so as to heat and mold raw material particles; 3) cooling, namely cooling the molded product in the cavity of the mold through a vacuum cooling system or an air cooling system; 4) and (3) demolding, namely opening the mold by utilizing a mold opening power source, automatically or manually separating the product molded in the mold cavity from the mold, and taking out the product. The invention can lead the structure of the foaming forming machine to be simple and compact, the microwave generator only needs to use electric energy, has less energy consumption and no pollution, reduces the manufacturing and using cost, and is energy-saving and environment-friendly.
Description
Technical Field
The invention belongs to the field of plastic product processing, and particularly relates to a method for foaming and molding expandable plastic particles by microwave heating.
Background
At present, the foaming of the expandable plastic particles usually adopts the way that steam generated by a boiler or a steam generator is sent into a mold cavity and is matched with the foaming plastic injected into the mold cavity for foaming, and on one hand, the steam generated by the boiler or the steam generator makes the structure of a foaming forming machine more complex and increases the whole volume of the foaming forming machine; on the other hand, the boiler needs to use coal or gas, so that the energy consumption is high, the emission can also generate pollution, and the manufacturing and using cost is increased.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides the method for foaming and molding the expandable plastic particles by microwave heating, which adopts microwave heating liquid to generate steam to match with the foamed plastic for foaming, so that the structure of a foaming and molding machine is simple and compact, the whole volume of the foaming and molding machine is reduced, and a microwave generator only needs to use electric energy, has small energy consumption and no pollution, not only reduces the manufacturing and using cost, but also is energy-saving and environment-friendly.
The technical scheme of the invention is as follows: a method for foaming and molding expandable plastic particles by microwave heating comprises the following steps:
1) feeding the mould and adding liquid, namely injecting the raw materials and the liquid into a cavity of the mould by using compressed air through a material injection gun, wherein the mould is made of a plastic high-temperature-resistant insulating material;
2) heating and foaming, namely configuring a microwave shielding cover and a microwave generator outside a mold cavity, and sending microwaves into the mold cavity through the microwave generator to heat and vaporize liquid in the mold cavity so as to heat and mold raw material particles;
3) cooling, namely cooling the molded product in the cavity of the mold through a vacuum cooling system or an air cooling system;
4) and (3) demolding, namely opening the mold by utilizing a mold opening power source, automatically or manually separating the product molded in the mold cavity from the mold, and taking out the product.
The microwave heating liquid is adopted to generate steam to be matched with the foaming plastic for foaming, so that the structure of the foaming forming machine is simple and compact, the whole volume of the foaming forming machine is reduced, and the microwave generator only needs electric energy, has low energy consumption and no pollution, reduces the manufacturing and using cost, and is energy-saving and environment-friendly.
Preferably, the mixing ratio of the raw materials and the liquid in the step 1) is ranged from 6:1 to 10:1, and the feeding time is ranged from 2 seconds to 30 seconds.
The mixing ratio of the raw materials and the liquid and the feeding time are adjusted according to different types and amounts of products.
Preferably, the microwave heating and forming temperature sent by the microwave generator in the step 2) is 110-130 ℃, and the heating and forming time is generally 3-50 seconds.
The microwave heating forming temperature and the heating forming time are adjusted correspondingly according to different types and amounts of products.
Preferably, when the vacuum cooling system is adopted for cooling in the step 3), the vacuum negative pressure is required to be-0.4 kg/CM2The cooling time is between 10 and 200 seconds.
Preferably, when the air cooling system is adopted for cooling in the step 3), the air volume of the fan is up to 2000m3Cooling time is 10-200 seconds.
Preferably, the mold opening power source in the step 4) adopts one of a motor, an oil cylinder or an air cylinder.
Preferably, the raw material is EPS particles, EPP particles or ETPU particles, and the liquid is clean water.
The microwave heating liquid is adopted to generate steam to be matched with the foaming plastic for foaming, so that the structure of the foaming forming machine is simple and compact, the whole volume of the foaming forming machine is reduced, and the microwave generator only needs electric energy, has low energy consumption and no pollution, reduces the manufacturing and using cost, and is energy-saving and environment-friendly.
Detailed Description
The present invention is further illustrated in detail by the following examples, which are not intended to limit the scope of the invention.
Example 1
A method for foaming and molding expandable plastic particles by microwave heating comprises the following steps:
1) feeding the mould and adding liquid, namely injecting the raw materials and the liquid into a cavity of the mould by using compressed air through a material injection gun, wherein the mould is made of a plastic high-temperature-resistant insulating material;
2) heating and foaming, namely configuring a microwave shielding cover and a microwave generator outside a mold cavity, and sending microwaves into the mold cavity through the microwave generator to heat and vaporize liquid in the mold cavity so as to heat and mold raw material particles;
3) cooling, namely cooling the molded product in the cavity of the mold through a vacuum cooling system or an air cooling system;
4) and (3) demolding, namely opening the mold by utilizing a mold opening power source, automatically or manually separating the product molded in the mold cavity from the mold, and taking out the product.
The mixing ratio of the raw materials to the liquid in the step 1) is listed as 6:1, and the feeding time is 15 seconds.
The microwave heating and forming temperature sent by the microwave generator in the step 2) is 110 ℃, and the heating and forming time is generally 35 seconds.
When the vacuum cooling system is adopted for cooling in the step 3), the vacuum negative pressure is required to be-0.4 kg/CM2Above, the cooling time is between 100 seconds.
And 4) adopting a motor as a mold opening power source.
The raw material is EPS particles, and the liquid is clean water.
Example 2
A method for foaming and molding expandable plastic particles by microwave heating comprises the following steps:
1) feeding the mould and adding liquid, namely injecting the raw materials and the liquid into a cavity of the mould by using compressed air through a material injection gun, wherein the mould is made of a plastic high-temperature-resistant insulating material;
2) heating and foaming, namely configuring a microwave shielding cover and a microwave generator outside a mold cavity, and sending microwaves into the mold cavity through the microwave generator to heat and vaporize liquid in the mold cavity so as to heat and mold raw material particles;
3) cooling, namely cooling the molded product in the cavity of the mold through a vacuum cooling system or an air cooling system;
4) and (3) demolding, namely opening the mold by utilizing a mold opening power source, automatically or manually separating the product molded in the mold cavity from the mold, and taking out the product.
The mixing ratio of the raw materials to the liquid in the step 1) is set to be 10:1, and the feeding time is 15 seconds.
The microwave heating and forming temperature sent by the microwave generator in the step 2) is 130 ℃, and the heating and forming time is generally 23 seconds.
When the vacuum cooling system is adopted for cooling in the step 3), the vacuum negative pressure is required to be-0.4 kg/CM2Above, the cooling time was between 120 seconds.
And 4) adopting an oil cylinder as a mold opening power source.
The raw material is EPP particles, and the liquid is clean water.
Example 3
A method for foaming and molding expandable plastic particles by microwave heating comprises the following steps:
1) feeding the mould and adding liquid, namely injecting the raw materials and the liquid into a cavity of the mould by using compressed air through a material injection gun, wherein the mould is made of a plastic high-temperature-resistant insulating material;
2) heating and foaming, namely configuring a microwave shielding cover and a microwave generator outside a mold cavity, and sending microwaves into the mold cavity through the microwave generator to heat and vaporize liquid in the mold cavity so as to heat and mold raw material particles;
3) cooling, namely cooling the molded product in the cavity of the mold through a vacuum cooling system or an air cooling system;
4) and (3) demolding, namely opening the mold by utilizing a mold opening power source, automatically or manually separating the product molded in the mold cavity from the mold, and taking out the product.
The mixing ratio of the raw materials to the liquid in the step 1) is set to be 8:1, and the feeding time is 15 seconds.
The microwave heating and forming temperature sent by the microwave generator in the step 2) is 120 ℃, and the heating and forming time is generally 28 seconds.
When the air cooling system is adopted for cooling in the step 3), the air quantity of the fan reaches 2000m3Cooling time was between 110 seconds.
And 4) adopting an oil cylinder as a mold opening power source.
The raw material is ETPU particles, and the liquid is clean water.
The microwave heating liquid is adopted to generate steam to be matched with the foaming plastic for foaming, so that the structure of the foaming forming machine is simple and compact, the whole volume of the foaming forming machine is reduced, and the microwave generator only needs electric energy, has low energy consumption and no pollution, reduces the manufacturing and using cost, and is energy-saving and environment-friendly.
Claims (7)
1. A method for foaming and molding expandable plastic particles by microwave heating is characterized in that: the method comprises the following steps:
1) feeding the mould and adding liquid, namely injecting the raw materials and the liquid into a cavity of the mould by using compressed air through a material injection gun, wherein the mould is made of a plastic high-temperature-resistant insulating material;
2) heating and foaming, namely configuring a microwave shielding cover and a microwave generator outside a mold cavity, and sending microwaves into the mold cavity through the microwave generator to heat and vaporize liquid in the mold cavity so as to heat and mold raw material particles;
3) cooling, namely cooling the molded product in the cavity of the mold through a vacuum cooling system or an air cooling system;
4) and (3) demolding, namely opening the mold by utilizing a mold opening power source, automatically or manually separating the product molded in the mold cavity from the mold, and taking out the product.
2. The method for foaming and molding expandable plastic particles by microwave heating as claimed in claim 1, wherein: the mixing ratio of the raw materials to the liquid in the step 1) is set to be 6:1-10:1, and the feeding time is 2-30 seconds.
3. The method for foaming and molding expandable plastic particles by microwave heating as claimed in claim 1, wherein: the microwave heating and forming temperature sent by the microwave generator in the step 2) is 110-130 ℃, and the heating and forming time is generally 3-50 seconds.
4. The method for foaming and molding expandable plastic particles by microwave heating as claimed in claim 1, wherein: when the vacuum cooling system is adopted for cooling in the step 3), the vacuum negative pressure is required to be-0.4 kg/CM2The cooling time is between 10 and 200 seconds.
5. The method for foaming and molding expandable plastic particles by microwave heating as claimed in claim 1, wherein: when the air cooling system is adopted for cooling in the step 3), the air quantity of the fan reaches 2000m3Cooling time is 10-200 seconds.
6. The method for foaming and molding expandable plastic particles by microwave heating as claimed in claim 1, wherein: and in the step 4), the mold opening power source adopts one of a motor, an oil cylinder or an air cylinder.
7. The method for foaming and molding expandable plastic particles by microwave heating as claimed in claim 1, wherein: the raw materials are EPS particles, EPP particles or ETPU particles, and the liquid is clean water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911123924.XA CN112810018A (en) | 2019-11-18 | 2019-11-18 | Method for foaming and molding expandable plastic particles by microwave heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911123924.XA CN112810018A (en) | 2019-11-18 | 2019-11-18 | Method for foaming and molding expandable plastic particles by microwave heating |
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| Publication Number | Publication Date |
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| CN112810018A true CN112810018A (en) | 2021-05-18 |
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| CN201911123924.XA Pending CN112810018A (en) | 2019-11-18 | 2019-11-18 | Method for foaming and molding expandable plastic particles by microwave heating |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108215044A (en) * | 2018-03-07 | 2018-06-29 | 泉州师范学院 | A kind of polymer foaming device and the method that polymer foaming is carried out using the device |
| CN108372622A (en) * | 2018-03-07 | 2018-08-07 | 泉州师范学院 | High molecular material foam device and its application method |
| CN108472843A (en) * | 2016-01-18 | 2018-08-31 | 库尔兹股份有限公司 | Method and apparatus for manufacturing particle foam component |
| KR20190001390A (en) * | 2017-06-27 | 2019-01-04 | 강성복 | Manufacturing method of expandable polystyrene using microwave |
| CN109624182A (en) * | 2018-11-19 | 2019-04-16 | 泉州诚宇鞋业有限公司 | A kind of slippers or sole material foam process and foam-in-mould device |
-
2019
- 2019-11-18 CN CN201911123924.XA patent/CN112810018A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108472843A (en) * | 2016-01-18 | 2018-08-31 | 库尔兹股份有限公司 | Method and apparatus for manufacturing particle foam component |
| KR20190001390A (en) * | 2017-06-27 | 2019-01-04 | 강성복 | Manufacturing method of expandable polystyrene using microwave |
| CN108215044A (en) * | 2018-03-07 | 2018-06-29 | 泉州师范学院 | A kind of polymer foaming device and the method that polymer foaming is carried out using the device |
| CN108372622A (en) * | 2018-03-07 | 2018-08-07 | 泉州师范学院 | High molecular material foam device and its application method |
| CN109624182A (en) * | 2018-11-19 | 2019-04-16 | 泉州诚宇鞋业有限公司 | A kind of slippers or sole material foam process and foam-in-mould device |
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Application publication date: 20210518 |
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