CN112810058A - Production process of IPET thickened container - Google Patents
Production process of IPET thickened container Download PDFInfo
- Publication number
- CN112810058A CN112810058A CN202110003535.4A CN202110003535A CN112810058A CN 112810058 A CN112810058 A CN 112810058A CN 202110003535 A CN202110003535 A CN 202110003535A CN 112810058 A CN112810058 A CN 112810058A
- Authority
- CN
- China
- Prior art keywords
- ipet
- bottle
- blank
- injection molding
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000007664 blowing Methods 0.000 claims abstract description 49
- 239000002245 particle Substances 0.000 claims abstract description 26
- 238000001035 drying Methods 0.000 claims abstract description 22
- 238000001746 injection moulding Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000008719 thickening Effects 0.000 claims description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000002932 luster Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/58—Blowing means
-
- 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
- B29C2045/0096—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor drying the moulding material before injection, e.g. by heating
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
-
- 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
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a production process of an IPET thickened container, and belongs to the technical field of plastic containers. It comprises the following steps: (1) fully drying the IPET particles; (2) after the dried IPET particles enter an injection molding machine from a drying hopper, the IPET particles are fully mixed, melted and filled into a mold through a screw mixer of the injection molding machine at the temperature of 220 ℃ to obtain a bottle blank; (3) and (3) placing the bottle blank into a bottle blowing machine to position a blank head, performing air blowing forming for the first time, exhausting air, and performing circular air blowing forming for the second time to ensure that the product is not shrunk after being cooled, so as to obtain a finished product with the thickness of 8mm or more. Mixing by using a screw before injection molding, wherein a mixer is integrated at the head of the screw, and the molten IPET is fully mixed when passing through the head of the screw, so that the raw materials are more uniformly molten; compared with single air blowing, the double-circulation air blowing device has the advantages that the IPET thick-wall bottle can be fully shaped by utilizing secondary circulation air blowing, the wall thickness of the bottle body is kept uniform, standing is stable, and the bottle body has good gloss.
Description
Technical Field
The invention relates to a production process of an IPET thickened container, belonging to the technical field of plastic containers.
Background
Plastic containers, i.e., hollow blow molded containers, are processed by a hollow molding method. The plastic barrel and the tank with the opening are mainly used for containing solid chemicals, foods, medicines and the like; the closed plastic bucket and tank are mainly used for containing liquid substances. It has the characteristics of light weight, difficult breakage, corrosion resistance and recyclability. At present, the thickness of a plastic container made of IPET plastic particles, namely an IPET container (bottle), is generally 6mm, and the thickness of the plastic container is thicker, so that the wall thickness is not uniform, the standing is not stable, and the luster of the IPET bottle is not strong. Therefore, in the existing production process, the forming mode is improved, the wall thickness of the IPET bottle reaches more than 8mm by utilizing secondary circulating blowing, the wall thickness of the bottle body can be kept uniform, standing is stable, and the bottle body has good gloss.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the IPET thickened container production process solves the problems that the wall thickness of the IPET thickened container reaches more than 8mm, the wall thickness is not uniform, standing is not stable, and the luster of an IPET bottle is not strong.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a production process of an IPET thickening container comprises the following steps:
(1) drying the IPET plastic particles at 55-62 ℃ by using a drying hopper, dehumidifying for 2 hours, and fully drying the IPET particles;
(2) after the dried IPET particles enter an injection molding machine from a drying hopper, the dried IPET particles are fully mixed, melted and filled into a mold through a screw mixer of the injection molding machine at the temperature of 220 ℃, and the blank is injected and molded by utilizing a 110MPA-125MPA high-pressure and 45mm/s-50mm/s low-speed process to obtain a bottle blank;
(3) the bottle blank is placed into a positioning blank head of a bottle blowing machine, the bottle blowing machine is operated and heated, when the bottle blank enters a former die of a forming group of the bottle blowing machine, the blank head is automatically positioned, the pressure of high-pressure air for bottle blowing forming is set to be 28kg-36kg, the action pressure is set to be 6kg-8kg, the cooling temperature is set to be 16 ℃, the circulating pressure of the die is set to be 3kg-5kg, air is exhausted after the first air blowing forming, then the second circulating air blowing forming is carried out, the shrinkage phenomenon of the product after the product is cooled is ensured, and the finished product with the thickness of 8mm or more.
As a preferred example, the injection molding machine employs a 260T injection molding machine.
As a preferable example, the bottle blowing machine adopts a full-servo electric bottle blowing machine.
The invention has the beneficial effects that:
(1) the screw is used for mixing before injection molding, IPET particles are heated and compressed after entering an injection molding machine and are gradually melted, a mixer is integrated at the head of the screw, and the melted IPET is fully mixed when passing through the head of the screw, so that the raw materials are melted more uniformly.
(2) The method has the advantages that the air is exhausted after the first air blowing forming, the second circulating air blowing forming is carried out, the shrinkage phenomenon after the product is cooled can be improved, the finished product with the thickness of 8mm or more is obtained, compared with the single air blowing, the second circulating air blowing is utilized, the IPET thick-wall bottle can be fully formed, the wall thickness of the bottle body is kept uniform, the standing is stable, and the bottle body has good gloss.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easily understood, the invention is further described with reference to the following embodiments.
Example 1
A production process of an IPET thickening container comprises the following steps:
(1) drying IPET plastic particles at 60 ℃ by using a drying hopper, dehumidifying for 2 hours, and fully drying the IPET particles;
(2) after the dried IPET particles enter an injection molding machine from a drying hopper, the IPET particles are fully mixed, melted and filled into a mold through a screw mixer of the injection molding machine at the temperature of 220 ℃, and the blank is injected and molded by a 120MPA high-pressure and 45mm/s low-speed process to obtain a bottle blank; the screw mixer is an extrusion device integrated with the mixer at the head (extrusion end) of the screw, and the raw materials are fully mixed and extruded in the cavity of the mixer, so that the raw materials can be melted more uniformly. The screw part of the screw mixer is formed by symmetrically splicing two parallel C-shaped screw shells to form parallel double-screw extrusion equipment.
(3) The bottle blank is placed into a positioning blank head of a bottle blowing machine, the bottle blowing machine is operated and heated, when the bottle blank enters a former die of a forming group of the bottle blowing machine, the blank head is automatically positioned, the pressure of high-pressure air for bottle blowing forming is set to be 28kg, the action pressure is set to be 6kg, the cooling temperature is set to be 16 ℃, the circulating pressure of the die is set to be 3kg, air is exhausted after the first air blowing forming, then the second circulating air blowing forming is carried out, the shrinkage phenomenon of the product after the product is cooled is avoided, and the finished product with the thickness of 8mm or more.
Example 2
A production process of an IPET thickening container comprises the following steps:
(1) drying IPET plastic particles at 60 ℃ by using a drying hopper, dehumidifying for 2 hours, and fully drying the IPET particles;
(2) after the dried IPET particles enter an injection molding machine from a drying hopper, the IPET particles are fully mixed, melted and filled into a mold through a screw mixer of the injection molding machine at the temperature of 220 ℃, and the blank is injected and molded by a 120MPA high-pressure and 50mm/s low-speed process to obtain a bottle blank;
(3) the bottle blank is placed into a positioning blank head of a bottle blowing machine, the bottle blowing machine is operated and heated, when the bottle blank enters a former die of a forming group of the bottle blowing machine, the blank head is automatically positioned, the pressure of high-pressure air for bottle blowing forming is set to be 36kg, the action pressure is set to be 8kg, the cooling temperature is set to be 16 ℃, the circulating pressure of the die is set to be 5kg, air is exhausted after the first air blowing forming, then the second circulating air blowing forming is carried out, the shrinkage phenomenon of the product after the cooling is ensured, and the finished product with the thickness of 8mm or more is obtained.
Example 3
A production process of an IPET thickening container comprises the following steps:
(1) drying IPET plastic particles at 60 ℃ by using a drying hopper, dehumidifying for 2 hours, and fully drying the IPET particles;
(2) after the dried IPET particles enter an injection molding machine from a drying hopper, the IPET particles are fully mixed, melted and filled into a mold through a screw mixer of the injection molding machine at the temperature of 220 ℃, and the blank is injected and molded by a 120MPA high-pressure and 50mm/s low-speed process to obtain a bottle blank;
(3) the bottle blank is placed into a positioning blank head of a bottle blowing machine, the bottle blowing machine is operated and heated, when the bottle blank enters a former die of a forming group of the bottle blowing machine, the blank head is automatically positioned, the pressure of high-pressure air for bottle blowing forming is set to be 32kg, the action pressure is set to be 7kg, the cooling temperature is set to be 16 ℃, the circulating pressure of the die is set to be 4kg, air is exhausted after the first air blowing forming, then the second circulating air blowing forming is carried out, the shrinkage phenomenon of the product after the product is cooled is avoided, and the finished product with the thickness of 8mm or more.
It has the following advantages:
(1) the screw is used for mixing before injection molding, IPET particles are heated and compressed after entering an injection molding machine and are gradually melted, a mixer is integrated at the head of the screw, and the melted IPET is fully mixed when passing through the head of the screw, so that the raw materials are melted more uniformly.
(2) The method has the advantages that the air is exhausted after the first air blowing forming, the second circulating air blowing forming is carried out, the shrinkage phenomenon after the product is cooled can be improved, the finished product with the thickness of 8mm or more is obtained, compared with the single air blowing, the second circulating air blowing is utilized, the IPET thick-wall bottle can be fully formed, the wall thickness of the bottle body is kept uniform, the standing is stable, and the bottle body has good gloss.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A production process of an IPET thickening container is characterized by comprising the following steps:
(1) drying the IPET plastic particles at 55-62 ℃ by using a drying hopper, dehumidifying for 2 hours, and fully drying the IPET particles;
(2) after the dried IPET particles enter an injection molding machine from a drying hopper, the dried IPET particles are fully mixed, melted and filled into a mold through a screw mixer of the injection molding machine at the temperature of 220 ℃, and the blank is injected and molded by utilizing a 110MPA-125MPA high-pressure and 45mm/s-50mm/s low-speed process to obtain a bottle blank;
(3) the bottle blank is placed into a positioning blank head of a bottle blowing machine, the bottle blowing machine is operated and heated, when the bottle blank enters a former die of a forming group of the bottle blowing machine, the blank head is automatically positioned, the pressure of high-pressure air for bottle blowing forming is set to be 28kg-36kg, the action pressure is set to be 6kg-8kg, the cooling temperature is set to be 16 ℃, the circulating pressure of the die is set to be 3kg-5kg, air is exhausted after the first air blowing forming, then the second circulating air blowing forming is carried out, the shrinkage phenomenon of the product after the product is cooled is ensured, and the finished product with the thickness of 8mm or more.
2. The process of claim 1, wherein the injection molding machine is a 260T injection molding machine.
3. The process for producing an IPET thickened container according to claim 1, wherein the bottle blowing machine is a full servo electric bottle blowing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110003535.4A CN112810058A (en) | 2021-01-04 | 2021-01-04 | Production process of IPET thickened container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110003535.4A CN112810058A (en) | 2021-01-04 | 2021-01-04 | Production process of IPET thickened container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112810058A true CN112810058A (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110003535.4A Pending CN112810058A (en) | 2021-01-04 | 2021-01-04 | Production process of IPET thickened container |
Country Status (1)
| Country | Link |
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| CN (1) | CN112810058A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347433A (en) * | 2022-02-16 | 2022-04-15 | 西安长鸿塑料制品有限公司 | Repeated blow molding transformation device of blow molding system of blow molding machine and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464833A (en) * | 2001-07-31 | 2003-12-31 | 株式会社吉野工业所 | Method of manufacturing bottle formed mainly of polyethylene terephthalate resin |
| CN101115608A (en) * | 2005-02-04 | 2008-01-30 | 宝洁公司 | Process for the manufacture of containers which have an integral handle, and containers manufactured thereby |
| CN103331900A (en) * | 2013-05-30 | 2013-10-02 | 佛山市旭捷包装技术有限公司 | Production process for heat-resistant PET bottle by blowing gas twice, and special adjusting device therefor |
| CN108044915A (en) * | 2017-12-18 | 2018-05-18 | 常熟市沈氏塑业有限公司 | A kind of processing technology of PET blow molded bottles |
| CN109608832A (en) * | 2018-11-29 | 2019-04-12 | 常熟市沈氏塑业有限公司 | A kind of illusion-colour bloom plastic bottle and its processing technology |
| CN111465481A (en) * | 2017-09-29 | 2020-07-28 | 日精Asb机械株式会社 | Blow molding method and blow molding apparatus |
-
2021
- 2021-01-04 CN CN202110003535.4A patent/CN112810058A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464833A (en) * | 2001-07-31 | 2003-12-31 | 株式会社吉野工业所 | Method of manufacturing bottle formed mainly of polyethylene terephthalate resin |
| CN101115608A (en) * | 2005-02-04 | 2008-01-30 | 宝洁公司 | Process for the manufacture of containers which have an integral handle, and containers manufactured thereby |
| CN103331900A (en) * | 2013-05-30 | 2013-10-02 | 佛山市旭捷包装技术有限公司 | Production process for heat-resistant PET bottle by blowing gas twice, and special adjusting device therefor |
| CN111465481A (en) * | 2017-09-29 | 2020-07-28 | 日精Asb机械株式会社 | Blow molding method and blow molding apparatus |
| CN108044915A (en) * | 2017-12-18 | 2018-05-18 | 常熟市沈氏塑业有限公司 | A kind of processing technology of PET blow molded bottles |
| CN109608832A (en) * | 2018-11-29 | 2019-04-12 | 常熟市沈氏塑业有限公司 | A kind of illusion-colour bloom plastic bottle and its processing technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347433A (en) * | 2022-02-16 | 2022-04-15 | 西安长鸿塑料制品有限公司 | Repeated blow molding transformation device of blow molding system of blow molding machine and control method thereof |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210518 |
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| RJ01 | Rejection of invention patent application after publication |