CN110789046A - EPS foaming filling process for blow-molded product - Google Patents
EPS foaming filling process for blow-molded product Download PDFInfo
- Publication number
- CN110789046A CN110789046A CN201911078553.8A CN201911078553A CN110789046A CN 110789046 A CN110789046 A CN 110789046A CN 201911078553 A CN201911078553 A CN 201911078553A CN 110789046 A CN110789046 A CN 110789046A
- Authority
- CN
- China
- Prior art keywords
- foaming
- filling process
- eps
- hollow product
- product
- 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.)
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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
- 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
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/18—Filling preformed cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/06—PS, i.e. polystyrene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/08—Copolymers of styrene, e.g. AS or SAN, i.e. acrylonitrile styrene
Abstract
The invention provides an EPS foaming filling process for blow molding products, which comprises the following steps: step 1: mixing and filling foaming agent raw materials into a hollow product which is blown in advance, and pre-foaming for 4-6min at the temperature of 93-98 ℃; step 2: introducing high-temperature steam into the hollow product until the EPS beads are completely melted; and step 3: and cooling the hollow product to obtain the product. Compared with the prior art, the invention effectively improves the uniformity of the EPS foaming body by adopting a foaming filling process, thereby solving the problem of uneven foaming effect, ensuring that the blow-molded product can be effectively supported by the EPS foaming body, and prolonging the service life of the blow-molded product.
Description
Technical Field
The invention relates to a foaming filling process, in particular to an EPS foaming filling process for blow-molded products.
Background
The existing blow-molded products have wide application due to the advantages of light weight, easy molding, low cost and the like. However, the blow-molded product is hollow inside and is easily bent due to external force, so that the blow-molded product is damaged, and the service life of the blow-molded product is influenced. In the prior art, a foaming filling mode is adopted to fill a foaming material into a blow-molded product, and the foaming material is utilized to support the structure of the blow-molded product, so that the durability of the blow-molded product is improved, but the foaming filling process of the existing blow-molded product cannot enable the foaming material to be uniformly foamed, so that the foaming state is not uniform, the supporting effect is not uniform, and the blow-molded product cannot be fully supported.
Disclosure of Invention
The invention provides an EPS foaming filling process for blow molding products, which at least solves the problem of uneven foaming effect in the prior art.
An EPS foaming filling process for blow molding products, which comprises the following steps:
step 1: mixing and filling foaming agent raw materials into a hollow product which is blown in advance, and pre-foaming for 4-6min at the temperature of 93-98 ℃;
step 2: introducing high-temperature steam into the hollow product until the EPS beads are completely melted;
and step 3: and cooling the hollow product to obtain the product.
Further, the pressure of the high-temperature steam in the step 2 is 0.07-0.09MPa, and the introducing time is 18-22 mins.
Furthermore, a foaming agent filling opening is formed in the hollow product, and a plurality of steam inlets are formed in one end, far away from the foaming agent filling opening, of the hollow product.
Further, the EPS foaming agent consists of 90-96 parts by weight of EPS beads and 4-6 parts by weight of foaming agent.
Still further, the EPS beads are selected from one or more of HIPS, acrylonitrile-butadiene-styrene copolymer.
Still further, the blowing agent is selected from one or more of n-pentane, isopentane, n-hexane, decafluoropentane.
Further, in the step 2, a shaping tool is further arranged outside the hollow product, and the shaping tool is fixed outside the hollow product.
Further, in the step 3, a water chiller or a refrigerator is adopted to cool and solidify the hollow product.
Compared with the prior art, the invention effectively improves the uniformity of the EPS foaming body by adopting a foaming filling process, thereby solving the problem of uneven foaming effect and ensuring that the blow-molded product can be effectively supported by the EPS foaming body. Meanwhile, the foaming filling process disclosed by the invention is convenient to fill and form, low in density and light in weight, low in water absorption rate of products, good in waterproof performance, excellent in erosion resistance to various chemicals, solvents and oil, and long in service life (generally, the service life can reach 30-50 years). In addition, the invention adopts a pre-foaming mode to carry out secondary foaming molding on the EPS foaming body, thereby effectively improving the uniformity of the EPS foaming body and avoiding uneven pores.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The hollow products used in examples 1-2 and comparative examples 1-2 of the present invention were in the form of strips, each having a hollow cavity therein, a foaming agent filling port at one end thereof, and 4 steam inlets at the end thereof remote from the foaming agent filling port
The hollow product used in comparative example 3 of the present invention was a strip-shaped structure, and had a cavity therein, a foaming agent filling port was provided at one end, and a steam inlet port was provided at the end close to the foaming agent filling port.
Example 1
The foaming agent raw materials of the embodiment of the invention comprise 96 parts by weight of HIPS beads and 4 parts by weight of n-pentane.
The blowing product foaming filling process in the embodiment 1 of the invention is as follows:
step 1: mixing and filling foaming agent raw materials into a hollow product which is blown in advance, installing the hollow product in a shaping tool, and pre-foaming for 4min at the temperature of 93-98 ℃;
step 2: introducing high-temperature steam into the hollow product until the EPS beads are completely melted;
and step 3: and (5) cooling the hollow product by using a refrigerator to obtain the product.
Example 2
The foaming agent raw materials of the embodiment of the invention comprise 96 parts by weight of HIPS beads and 4 parts by weight of decafluoropentane.
The blowing product foaming filling process in embodiment 2 of the invention is as follows:
step 1: mixing and filling foaming agent raw materials into a hollow product which is blown in advance, and pre-foaming for 4min at the temperature of 93-98 ℃;
step 2: introducing high-temperature steam into the hollow product until the EPS beads are completely melted;
and step 3: and (5) cooling the hollow product by using a refrigerator to obtain the product.
Comparative example 1
The foaming agent raw materials of the comparative example of the present invention include 96 parts by weight of HIPS beads and 4 parts by weight of n-pentane.
Comparative example 1 of the present invention the process for filling the blow molded article by foaming was as follows:
step 1: mixing and filling foaming agent raw materials into a hollow product which is blown in advance, installing the hollow product in a shaping tool, and introducing high-temperature steam into the hollow product until EPS beads are completely melted;
step 2: and (5) cooling the hollow product by using a refrigerator to obtain the product.
Comparative example 2
The foaming agent raw materials of the comparative example of the present invention include 96 parts by weight of HIPS beads and 4 parts by weight of n-pentane.
Comparative example 2 of the present invention the process for filling the blow molded article by foaming was as follows:
step 1: mixing and filling foaming agent raw materials into a hollow product which is blown in advance, installing the hollow product in a shaping tool, and pre-foaming for 4-6min at the temperature of 93-98 ℃;
step 2: introducing high-temperature steam into the hollow product until the EPS beads are completely melted;
and step 3: and naturally cooling the hollow product to obtain the product.
Comparative example 3
The foaming agent raw materials of the comparative example of the present invention include 96 parts by weight of HIPS beads and 4 parts by weight of n-pentane.
Comparative example 3 of the present invention the process for filling the blow molded article by foaming was as follows:
step 1: mixing and filling foaming agent raw materials into a hollow product which is blown in advance, installing the hollow product in a shaping tool, and pre-foaming for 4-6min at the temperature of 93-98 ℃;
step 2: introducing high-temperature steam into the hollow product until the EPS beads are completely melted;
and step 3: and naturally cooling the hollow product to obtain the product.
The blow molded articles of examples 1-2 and comparative examples 1-3 were cut and observed for filling with the foam of the blow molded articles, as shown in the following table:
| examples 1 | Examples 2 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Hair-like device Bubble Wood material Material Are all made of Uniform mixing Degree of rotation | Foaming material Density of material The uniformity is improved, and the uniformity is improved, and inside Is absent from Greater sky Gap | Foaming material Density of material The uniformity is improved, and the uniformity is improved, and inside Is absent from Greater sky Gap | Density of foamed material Non-uniform and foaming Lower density of material Degree and upper density Very different, foaming Severe unevenness of degree | Density of foamed material Uneven and uneven hair Lower part of the foam material Higher density, upper Small density of the part, inside Part has a larger space Gap | The foamed material having a non-uniform density Foaming near the filling opening of the foaming agent The material density is uniform and far away Foaming of the foaming material on the side of the filling opening Uneven state with a portion of EPS particles Completely melted into a whole. |
| Blowing machine Plastic System for making Article (A) Outer cover Model (III) | Is not changed | Expansion of | Is not changed | Is not changed | Is not changed |
Compared with the comparative example, the embodiment 1-2 of the invention adopts the foaming filling process to effectively improve the uniformity of the EPS foaming body, thereby solving the problem of uneven foaming effect and ensuring that the blow-molded product can be effectively supported by the EPS foaming body. Meanwhile, the foaming filling process of the embodiment 1-2 of the invention has the advantages of convenient filling and forming, low density, light weight, low water absorption of products, good waterproof performance, excellent erosion resistance to various chemicals, solvents and oils, and long service life (generally, the service life can reach 30-50 years). The embodiments 1 and 2 of the invention adopt low temperature to prolong foaming, can effectively improve the foaming degree of blow molding products, and compared with the comparison example 2, the invention has obvious improvement and improves the uniformity of foaming materials. In addition, the embodiment 1 and the embodiment 2 adopt a pre-foaming mode to carry out secondary foaming molding on the EPS foaming body, thereby effectively improving the uniformity of the EPS foaming body and avoiding uneven pores. It should be noted that, while the foaming agent filling opening of the present comparative example 3 is close to the steam inlet, which results in that the steam cannot effectively heat the EPS beads, resulting in poor and uneven foaming effect, examples 1-2 of the present invention effectively adopt the design of the opposite side of the hollow product foaming agent filling opening and the steam inlet, so that the steam uniformly heats the EPS beads, and the uniformity of the foaming material is improved.
Finally, it should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the modifications and equivalents of the specific embodiments of the present invention can be made by those skilled in the art after reading the present specification, but these modifications and variations do not depart from the scope of the claims of the present application.
Claims (8)
1. An EPS foaming filling process for blow molding products is characterized by comprising the following steps:
step 1: mixing and filling foaming agent raw materials into a hollow product which is blown in advance, and pre-foaming for 4-6min at the temperature of 93-98 ℃;
step 2: introducing high-temperature steam into the hollow product until the EPS beads are completely melted;
and step 3: and cooling the hollow product to obtain the product.
2. The filling process according to claim 1, wherein the pressure of the high-temperature steam in the step 2 is 0.07-0.09MPa, and the feeding time is 18-22 mins.
3. The filling process according to claim 1, wherein the hollow product is provided with a foaming agent filling opening, and the hollow product is further provided with a plurality of steam inlet openings at one end away from the foaming agent filling opening.
4. Filling process according to claim 1, wherein the EPS blowing agent consists of 90 to 96 parts by weight of EPS beads, 4 to 6 parts by weight of blowing agent.
5. The filling process according to claim 4, wherein the EPS beads are selected from one or more of HIPS, acrylonitrile-butadiene-styrene copolymer.
6. The filling process according to claim 4, wherein the blowing agent is selected from one or more of n-pentane, isopentane, n-hexane, decafluoropentane.
7. The filling process according to claim 1, wherein in the step 2, a shaping tool is further arranged outside the hollow product, and the shaping tool is fixed outside the hollow product.
8. The filling process according to claim 1, wherein the hollow product is cooled and solidified in the step 3 by using a water chiller or a refrigerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078553.8A CN110789046A (en) | 2019-11-06 | 2019-11-06 | EPS foaming filling process for blow-molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078553.8A CN110789046A (en) | 2019-11-06 | 2019-11-06 | EPS foaming filling process for blow-molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110789046A true CN110789046A (en) | 2020-02-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911078553.8A Pending CN110789046A (en) | 2019-11-06 | 2019-11-06 | EPS foaming filling process for blow-molded product |
Country Status (1)
| Country | Link |
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| CN (1) | CN110789046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113733441A (en) * | 2021-09-24 | 2021-12-03 | 山东省百年果蔬有限公司 | Float processing method |
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| CN105618680A (en) * | 2016-01-22 | 2016-06-01 | 常州市常协柴油机机体有限公司 | Full mold casting technique for diesel engine cylinder body |
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| CN108044858A (en) * | 2017-12-13 | 2018-05-18 | 南通市金马包装材料有限公司 | A kind of eps foam product and its production technology |
| CN109109254A (en) * | 2018-09-06 | 2019-01-01 | 光之能（厦门）科技有限公司 | A kind of foam filled technique of blow-molded article |
| CN109551701A (en) * | 2018-11-26 | 2019-04-02 | 北京化工大学 | A kind of semi-crystalline polymer foam in place mold shaping method |
-
2019
- 2019-11-06 CN CN201911078553.8A patent/CN110789046A/en active Pending
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| EP0123816A1 (en) * | 1983-04-05 | 1984-11-07 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Pre-expanded particle of polyolefin and process for preparing the same |
| EP0153706A2 (en) * | 1984-02-22 | 1985-09-04 | Japan Styrene Paper Corporation | Production method of expansion-molded article of thermoplastic resin and apparatus therefor |
| US5665285A (en) * | 1995-01-24 | 1997-09-09 | Mitsubishi Yuka Badische Co., Ltd. | Method for producing a molded foam article with an integral skin |
| JP2000127193A (en) * | 1998-10-30 | 2000-05-09 | Toho Kogyo Kk | Manufacture of foamed polystyrene with skin |
| DE10009470A1 (en) * | 2000-02-28 | 2001-09-06 | Moeller Plast Gmbh | Process for producing a composite component with a foamed surface |
| JP2003039469A (en) * | 2001-07-26 | 2003-02-13 | Sekisui Plastics Co Ltd | In-mold foamed molded object of thermoplastic polyester resin, method for manufacturing the same and use of in-mold foamed molded object |
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| CN103737780A (en) * | 2014-01-20 | 2014-04-23 | 林友向 | Floating ball making mould and floating ball production secondary foaming forming process |
| CN105618680A (en) * | 2016-01-22 | 2016-06-01 | 常州市常协柴油机机体有限公司 | Full mold casting technique for diesel engine cylinder body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113733441A (en) * | 2021-09-24 | 2021-12-03 | 山东省百年果蔬有限公司 | Float processing method |
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Application publication date: 20200214 |
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