CN113858879A - Thermoplastic elastomer caster and injection molding process thereof - Google Patents
Thermoplastic elastomer caster and injection molding process thereof Download PDFInfo
- Publication number
- CN113858879A CN113858879A CN202111140775.5A CN202111140775A CN113858879A CN 113858879 A CN113858879 A CN 113858879A CN 202111140775 A CN202111140775 A CN 202111140775A CN 113858879 A CN113858879 A CN 113858879A
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- China
- Prior art keywords
- thermoplastic elastomer
- layer
- caster
- injection molding
- framework
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Links
- 229920002725 thermoplastic elastomer Polymers 0.000 title claims abstract description 61
- 238000001746 injection moulding Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 22
- 229920001971 elastomer Polymers 0.000 claims description 16
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 13
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 13
- 239000000806 elastomer Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 8
- 239000004952 Polyamide Substances 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 239000004417 polycarbonate Substances 0.000 claims description 6
- 229920000515 polycarbonate Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 5
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 5
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000003292 glue Substances 0.000 description 5
- 239000005060 rubber Substances 0.000 description 4
- 229920001875 Ebonite Polymers 0.000 description 3
- 235000004443 Ricinus communis Nutrition 0.000 description 3
- 240000000528 Ricinus communis Species 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000010073 coating (rubber) Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0028—Construction of wheels; methods of assembling on axle
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a thermoplastic elastomer caster and an injection molding process thereof. The thermoplastic elastomer layer and the framework layer adopt a double-shot injection molding process: the thermoplastic elastomer layer material and the skeleton layer material are placed in two charging barrels of a two-color injection molding machine, and the thermoplastic elastomer layer is firstly injected and then the skeleton layer is injected. The preparation method is simple; the inner surface of the thermoplastic elastomer layer is provided with a plurality of spaced bulges, so that the thermoplastic elastomer layer and the framework layer can be fully fused into a whole, and the prepared caster has strong bearing capacity and better buffering property and wear resistance.
Description
Technical Field
The invention relates to a thermoplastic elastomer caster and an injection molding process thereof, belonging to the technical field of preparation of high polymer materials.
Background
With the continuous development of intelligent conveying equipment, the demand of the caster is more and more; thermoplastic elastomer casters are widely used in conveying equipment. The thermoplastic polyurethane elastomer has excellent wear resistance, and the thermoplastic polyurethane elastomer is wrapped on the framework, so that the polyurethane caster with high bearing capacity, good buffering performance and good wear resistance can be obtained.
The thermoplastic elastomer rubber coating is a process of coating a thermoplastic elastomer serving as a soft rubber on a hard rubber in an injection molding mode. The process is mainly used for producing double-color injection products such as handles, mobile phone shells, toys and stationery, and a layer of soft glue is coated on the hard plastic so as to achieve the effect of improving hand feeling. The injection molding process is low in cost and simple, and thus, is advantageous in mass production.
Most of the traditional thermoplastic elastomer rubber coating adopts injection molding of hard rubber and then injection molding of soft rubber, and because the melting points and polarities of the hard rubber and the soft rubber are greatly different, nylon cannot be coated well, and only a thin layer can be coated barely; if the thickness of polyurethane is large, the adhesion of polyurethane and nylon is insufficient, and the rubber is easily stripped. This is completely substandard for injection molded products with thicker lagging materials such as casters.
Disclosure of Invention
The invention aims to solve the problems and provides a thermoplastic elastomer caster and an injection molding process thereof.
The invention adopts the following technical scheme: a thermoplastic elastomer caster comprises a thermoplastic elastomer layer, a framework layer and a bearing, wherein the framework layer used for supporting is arranged on the outer side of the bearing, the thermoplastic elastomer layer is wrapped on the outer side of the framework layer, and a plurality of spaced bulges are arranged on the inner side surface of the thermoplastic elastomer layer.
Further, the inner diameter dimension of the bearing is 4-60 mm.
Further, the thickness of the thermoplastic elastomer layer is 0.5 to 100 mm.
Further, the thickness of the framework layer is 2-130 mm.
Furthermore, the thermoplastic elastomer layer is made of one or more than two materials of thermoplastic elastomer, thermoplastic polyurethane elastomer, thermoplastic polyester elastomer and thermoplastic polyether elastomer.
Furthermore, the framework layer is made of one or more of Polyamide (PA), polypropylene (PP), acrylonitrile-butadiene-styrene (ABS) plastic and Polycarbonate (PC), and accounts for 20-95% of the total material.
Further, the framework layer also comprises one or two of filling fiber and mineral, and the filling fiber and the mineral account for 5% -60% of the framework material.
The processing method of the thermoplastic elastomer caster comprises the steps of respectively placing a thermoplastic elastomer layer material and a framework layer material into two charging barrels of a double-color injection molding machine by adopting a double-color injection molding process, firstly, injecting the thermoplastic elastomer layer, and then, injecting the framework layer.
Further, the injection molding temperature of the thermoplastic elastomer layer is 190-230 ℃, and the injection molding temperature of the framework layer is 200-260 ℃.
The invention has the beneficial effects that: the preparation method is simple, the steps are easy to operate, the inner surface of the thermoplastic elastomer layer is provided with the plurality of spaced bulges, the thermoplastic elastomer layer and the framework layer can be fully fused into a whole, and the prepared caster has strong bearing capacity and better buffering property and wear resistance.
Drawings
Fig. 1 is a schematic view of the construction of the caster of the present invention.
FIG. 2 is a schematic representation of the structure of the thermoplastic elastomer layer of the present invention.
Reference numerals: 1-thermoplastic elastomer layer, 2-framework layer, 3-bearing and 4-interval bulge.
Detailed Description
The invention will be further explained and illustrated with reference to specific embodiments.
As shown in fig. 1-2, the thermoplastic elastomer caster comprises a thermoplastic elastomer layer 1, a skeleton layer 2 and a bearing 3, wherein the outside of the bearing 3 is provided with the skeleton layer 2 for supporting, the outside of the skeleton layer 2 is wrapped with the thermoplastic elastomer layer 1, the inside surface of the thermoplastic elastomer layer 1 is provided with a plurality of spaced protrusions 4, the inner diameter of the bearing 3 is 4-60 mm, the thickness of the thermoplastic elastomer layer 1 is 0.5-100 mm, and the thickness of the skeleton layer 2 is 2-130 mm. The thermoplastic elastomer layer 1 is made of one or more of thermoplastic elastomer, thermoplastic polyurethane elastomer, thermoplastic polyester elastomer and thermoplastic polyether elastomer. The framework layer 2 is made of one or more than two of Polyamide (PA), polypropylene (PP), acrylonitrile-butadiene-styrene plastic (ABS) and Polycarbonate (PC), and accounts for 20-95% of the total material. The framework layer 2 also comprises one or two of filling fiber and mineral, and the proportion of the filling fiber and the mineral accounts for 5-60% of the framework material.
The injection molding process comprises the following three steps:
the first embodiment is as follows: the thermoplastic polyurethane elastomer TPU and the framework material filled with 30% of fiber PA6 are dried for 3 hours at the temperature of about 100 ℃, and then are respectively added into two charging barrels of a two-color injection molding machine, the thermoplastic polyurethane elastomer TPU is firstly injected at the injection temperature of 200 plus 230 ℃, then the framework material PA6 is injected at the injection temperature of 200 plus 260 ℃, a plurality of spaced bulges are arranged on the inner side surface of the thermoplastic elastomer layer at intervals, the bulges are in an arc shape, and then the bulges are embedded into the framework layer after the framework layer is injected, so that the bulges are integrated with the framework layer.
The elastomeric castors finally obtained were tested: the hardness is 95A, and the volume abrasion is 18 mm3The peel force between the hard and soft gels was 1530N.
Example two:
drying a thermoplastic elastomer (TPE) and a framework material filled with 30% of fiber PA6 for 3 hours at about 100 ℃, then respectively adding the TPE and the framework material into two charging barrels of a two-color injection molding machine, firstly injecting the TPE at the injection temperature of 190 plus one material, then injecting the framework material PA6 at the injection temperature of 200 plus one material, wherein the inner side surface of the thermoplastic elastomer layer is provided with a plurality of spaced bulges which are arc-shaped, and then injecting the framework layer so that the bulges are embedded into the framework layer and are integrated with the framework layer.
The elastomeric castors finally obtained were tested: the hardness is 95A, and the volume abrasion is 69 mm3The peel force of the hard glue and the soft glue is 1500N.
Example three:
the thermoplastic polyurethane elastomer TPU and the framework material polycarbonate PC are dried for 3 hours at about 100 ℃, and then are respectively added into two charging barrels of a double-color injection molding machine, the thermoplastic polyurethane elastomer TPU is firstly injected at the injection temperature of 210 plus 240 ℃, then the framework material PC is injected at the injection temperature of 220 plus 270 ℃, a plurality of spaced bulges are arranged on the inner side surface of the thermoplastic elastomer layer, the bulges are in an arc shape, and then the bulges are embedded into the framework layer to be integrated with the framework layer after the framework layer is injected.
The elastomeric castors finally obtained were tested: the hardness is 95A, and the volume abrasion is 26 mm3The peel force between the hard glue and the soft glue is 1470N.
Claims (9)
1. A thermoplastic elastomer caster, characterized by: the bearing is composed of a thermoplastic elastomer layer (1), a framework layer (2) and a bearing (3), wherein the framework layer (2) used for supporting is arranged on the outer side of the bearing (3), the thermoplastic elastomer layer (1) is wrapped on the outer side of the framework layer (2), and a plurality of spaced protrusions (4) are arranged on the inner side surface of the thermoplastic elastomer layer (1).
2. The thermoplastic elastomer caster of claim 1, wherein: the inner diameter of the bearing (3) is 4-60 mm.
3. The thermoplastic elastomer caster of claim 1, wherein: the thickness of the thermoplastic elastomer layer (1) is 0.5-100 mm.
4. The thermoplastic elastomer caster of claim 1, wherein: the thickness of the framework layer (2) is 2-130 mm.
5. The thermoplastic elastomer caster of claim 1, wherein: the thermoplastic elastomer layer (1) is made of one or more than two materials of thermoplastic elastomer, thermoplastic polyurethane elastomer, thermoplastic polyester elastomer and thermoplastic polyether elastomer.
6. The thermoplastic elastomer caster of claim 1, wherein: the framework layer (2) is made of one or more than two of Polyamide (PA), polypropylene (PP), acrylonitrile-butadiene-styrene plastic (ABS) and Polycarbonate (PC), and accounts for 20-95% of the total material.
7. The thermoplastic elastomer caster of claim 6, wherein: the framework layer (2) also comprises one or two of filling fiber and mineral, and the filling fiber and the mineral account for 5-60% of the framework material.
8. The method of manufacturing a thermoplastic elastomer caster according to claim 1, wherein: the thermoplastic elastomer layer (1) and the framework layer (2) are respectively placed in two charging barrels of a double-color injection molding machine by adopting a double-color injection molding process, the thermoplastic elastomer layer (1) is firstly injected, and then the framework layer (2) is injected.
9. The method of manufacturing a thermoplastic elastomer caster according to claim 8, wherein: the injection molding temperature of the thermoplastic elastomer layer (1) is 190-230 ℃, and the injection molding temperature of the framework layer (2) is 200-260 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111140775.5A CN113858879A (en) | 2021-09-28 | 2021-09-28 | Thermoplastic elastomer caster and injection molding process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111140775.5A CN113858879A (en) | 2021-09-28 | 2021-09-28 | Thermoplastic elastomer caster and injection molding process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113858879A true CN113858879A (en) | 2021-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111140775.5A Pending CN113858879A (en) | 2021-09-28 | 2021-09-28 | Thermoplastic elastomer caster and injection molding process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113858879A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207607303U (en) * | 2017-12-19 | 2018-07-13 | 江苏顶塑实业有限公司 | A kind of integral type thermoplastic elastomer (TPE) wheel set |
| CN208469466U (en) * | 2018-05-08 | 2019-02-05 | 黄亚文 | A kind of polyurethane foam tire |
| CN208664820U (en) * | 2018-09-04 | 2019-03-29 | 厦门弘基脚轮制造有限公司 | A kind of durable castor conducive to injection molding |
| CN209305224U (en) * | 2018-11-15 | 2019-08-27 | 浙江百力塑业有限公司 | A kind of hand-push type mower wheel |
| CN209851971U (en) * | 2019-04-04 | 2019-12-27 | 台州市金宇机电有限公司 | Anti-skidding lightweight motor of intelligence suitcase gyro wheel |
| CN112606628A (en) * | 2021-01-21 | 2021-04-06 | 广东云韬新材料科技有限公司 | Double-color injection-molded TPE (thermoplastic elastomer) plastic elastomer inflation-free tire and manufacturing process thereof |
-
2021
- 2021-09-28 CN CN202111140775.5A patent/CN113858879A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207607303U (en) * | 2017-12-19 | 2018-07-13 | 江苏顶塑实业有限公司 | A kind of integral type thermoplastic elastomer (TPE) wheel set |
| CN208469466U (en) * | 2018-05-08 | 2019-02-05 | 黄亚文 | A kind of polyurethane foam tire |
| CN208664820U (en) * | 2018-09-04 | 2019-03-29 | 厦门弘基脚轮制造有限公司 | A kind of durable castor conducive to injection molding |
| CN209305224U (en) * | 2018-11-15 | 2019-08-27 | 浙江百力塑业有限公司 | A kind of hand-push type mower wheel |
| CN209851971U (en) * | 2019-04-04 | 2019-12-27 | 台州市金宇机电有限公司 | Anti-skidding lightweight motor of intelligence suitcase gyro wheel |
| CN112606628A (en) * | 2021-01-21 | 2021-04-06 | 广东云韬新材料科技有限公司 | Double-color injection-molded TPE (thermoplastic elastomer) plastic elastomer inflation-free tire and manufacturing process thereof |
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| 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 | ||
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Application publication date: 20211231 |