CN104647678A - Injection molding method for polycarbonate glass plate - Google Patents
Injection molding method for polycarbonate glass plate Download PDFInfo
- Publication number
- CN104647678A CN104647678A CN201410739038.0A CN201410739038A CN104647678A CN 104647678 A CN104647678 A CN 104647678A CN 201410739038 A CN201410739038 A CN 201410739038A CN 104647678 A CN104647678 A CN 104647678A
- Authority
- CN
- China
- Prior art keywords
- injection
- section
- injection moulding
- injection molding
- polycarbonate
- 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
- 238000001746 injection moulding Methods 0.000 title claims abstract description 83
- 239000004417 polycarbonate Substances 0.000 title claims abstract description 37
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 27
- 239000011521 glass Substances 0.000 title claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000005496 tempering Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 27
- 239000007924 injection Substances 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 14
- 238000007493 shaping process Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
-
- 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
-
- 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
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- 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
- B29C2945/76551—Time
-
- 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
- B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an injection molding method for a polycarbonate glass plate, belonging to the field of injection molding processes. The method is characterized by comprising the following steps: drying polycarbonate by adopting a hot air type circulating air dryer; feeding the polycarbonate into an injection molding machine after the polycarbonate is completely dried; determining the injection molding position at each section of the screw rod of the injection molding machine and the injection molding temperature and pressure; fusing the polycarbonate and injecting into a mold cavity, molding, cooling and demolding; and tempering the molded product by adopting the temper in the hot air cycle. According to the improvement of the injection molding process, sink mark, fog marking and other bad defects of the injection molding glass plates are overcome, the operation is simple, and the cost is saved. Moreover, the injection molding method disclosed by the invention is reasonable in design, the surface quality and performance of the molded product are improved, and the method is applied to popularization and application in the related fields.
Description
Technical field
the invention belongs to Shooting Technique field, particularly relate to a kind of injection moulding process of polycarbonate glass plate.
Background technology
Along with the continuous progress of science and technology, increasing new material is produced and is used, the new technology that the generation along with new material occurs, is also constantly upgraded in the difference along with application.Cowl is an accessory on motorcycle, its traditional material is mainly polymethyl methacrylate, preparation method adopts thermoforming to prepare sheet material, again by the shape that its stamping-out becomes to need, but there is defects such as easily scratching plate surface, production process is many, benefit is low, sheet material waste is larger in such processing mode.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of injection moulding process of polycarbonate glass plate.
An injection moulding process for polycarbonate glass plate, is characterized in that comprising the steps:
(1) first adopt hot air type drying by circulating air machine to carry out drying process to Merlon, dry temperature is 115 DEG C ± 5 DEG C, and drying time is 8h; Injection machine is poured into after Merlon drying completely;
(2) injection-moulding position and injection temperature, the pressure of each section of injection machine inner screw is determined; 3 sections of injection mouldings are adopted to arrange; The quality of material of the 1st section of injection moulding is cast gate quality 27g, and injection-moulding position is set as 166.47mm; The injection moulding material quality settings of the 2nd section is 97% of quality of item, and injection-moulding position is set as 14.75mm; The quality of material of the 3rd section of injection moulding is set as 3% of quality of item, and injection-moulding position is set as 10.06mm;
(3) mold cavity is injected after polycarbonate melt, shaping rear cooling and demolding;
(4) adopted by moulded products tempering in hot air circulation to carry out temper, temper technological temperature is 120 DEG C, and tempering time is 15min.
The injection moulding process of a kind of polycarbonate glass plate of the present invention, is characterized in that described in step (2), injection temperature is set as 304 DEG C, nozzle; Injection moulding the 1st section 314 DEG C; Injection moulding the 2nd section 310 DEG C; Injection moulding the 3rd section 300 DEG C.
The injection moulding process of a kind of polycarbonate glass plate of the present invention, is characterized in that injection pressure described in step (2) is injection moulding the 1st section of 9.6MPa; Injection moulding the 2nd section of 12.5MPa; Injection moulding the 3rd section of 9.0MPa.
The injection moulding process of a kind of polycarbonate glass plate of the present invention, is characterized in that the pressure hold time of described each section is respectively: the 1st period of dwell time is 2s; 2nd period of dwell time is 1.5s; 3rd period of dwell time is 0.5s.
The injection moulding process of a kind of polycarbonate glass plate of the present invention, is characterized in that the temperature of model described in step (3) is 110 ~ 120 DEG C.
The injection moulding process of a kind of polycarbonate glass plate of the present invention, is characterized in that described in step (3), cool time is 38 ~ 42s.
The injection moulding process of a kind of polycarbonate glass plate of the present invention, by the improvement to injection molding process, ensure that the goods of plastic injection glass plate do not have the bad defect such as shrink mark, mist spot, simple to operate, save cost, the products surface quality that injection moulding process of the present invention is reasonable in design, shaping and performance are all improved, and are suitable for promoting the use of in association area.
Detailed description of the invention
An injection moulding process for polycarbonate glass plate, is characterized in that comprising the steps:
(1) first adopt hot air type drying by circulating air machine to carry out drying process to Merlon, dry temperature is 115 DEG C ± 5 DEG C, and drying time is 8h; Injection machine is poured into after Merlon drying completely;
(2) injection-moulding position and injection temperature, the pressure of each section of injection machine inner screw is determined; 3 sections of injection mouldings are adopted to arrange; The quality of material of the 1st section of injection moulding is cast gate quality 27g, and injection-moulding position is set as 166.47mm; The injection moulding material quality settings of the 2nd section is 97% of quality of item, and injection-moulding position is set as 14.75mm; The quality of material of the 3rd section of injection moulding is set as 3% of quality of item, and injection-moulding position is set as 10.06mm;
(3) mold cavity is injected after polycarbonate melt, shaping rear cooling and demolding;
(4) adopted by moulded products tempering in hot air circulation to carry out temper, temper technological temperature is 120 DEG C, and tempering time is 15min.
The injection moulding process of a kind of polycarbonate glass plate of the present invention, described in step (2), injection temperature is set as 304 DEG C, nozzle; Injection moulding the 1st section 314 DEG C; Injection moulding the 2nd section 310 DEG C; Injection moulding the 3rd section 300 DEG C.Injection pressure described in step (2) is injection moulding the 1st section of 9.6MPa; Injection moulding the 2nd section of 12.5MPa; Injection moulding the 3rd section of 9.0MPa.The pressure hold time of described each section is respectively: the 1st period of dwell time is 2s; 2nd period of dwell time is 1.5s; 3rd period of dwell time is 0.5s.Described in step (3), the temperature of model is 110 ~ 120 DEG C.The selection of mold temperature is shaping very important to PC.Improve mold temperature, be conducive to the flowing of PC, be conducive to the Slow cooling of goods, reduce the internal stress of goods, improve intensity and the surface smoothness of goods.If mold temperature is lower, after mold cavity is injected in PC melting, cooling velocity is very fast, melt temperature is subject to the impact of low mold temperature and declines rapidly, and melt viscosity becomes large, then PC flows and becomes difficulty in die cavity, molding product weld marks increases, and even can cause the phenomenon of injection moulding deficiency.Higher mold temperature is generally selected for PC, oil temperature machine can be adopted by mold heated to certain temperature, reach as high as 150 ~ 160 DEG C, in reality according to goods require control active and inactive mold temperature for cool time described in 110 ~ 120 DEG C of steps (3) be 38 ~ 42s.PC forming temperature is higher, is 280 ~ 320 DEG C, therefore under the prerequisite not making resin decomposition, should improve injection temperature as far as possible.The melt viscosity of PC is very responsive to variations in temperature, therefore injection temperature is selected higher, and resin Middle molecule chain movement is freer, and viscosity is lower, and fluidity of molten is better, thus contributes to the shaping of goods and reduce internal stress.General under low shear rate, temperature often falls 10 DEG C, and the melt viscosity of PC on average increases by 1.04 times.But injection temperature is too high, the problem such as PC resin decomposition, goods variable color will be had, especially can affect Mechanical Properties of Products.Injection moulding the 1st section, PC injection rate is unsuitable too high, and speed Tai Gaoyi produces mist spot at cast gate place, and injection pressure is also unsuitable too high; Injection moulding the 2nd section, adopt higher injection pressure to contribute to improving density and the mechanical property of goods, reduce product surface and shrink; Injection moulding the 3rd section, pressure and low speed in should selecting for injection pressure and injection rate.Based on above analysis, cowl injection pressure is set as injection moulding the 1st section of 9.6 MPa, injection moulding the 2nd section of 12.5 MPa, injection moulding the 3rd section of 9.0 MPa; The injection rate that injection moulding is the 1st section be maximum injection speed 17%, injection moulding the 2nd section be 98%, injection moulding the 3rd section be 28%, injection moulding the 4th section be 25%.
Claims (6)
1. an injection moulding process for polycarbonate glass plate, is characterized in that comprising the steps:
(1) first adopt hot air type drying by circulating air machine to carry out drying process to Merlon, dry temperature is 115 DEG C ± 5 DEG C, and drying time is 8h; Injection machine is poured into after Merlon drying completely;
(2) injection-moulding position and injection temperature, the pressure of each section of injection machine inner screw is determined; 3 sections of injection mouldings are adopted to arrange; The quality of material of the 1st section of injection moulding is cast gate quality 27g, and injection-moulding position is set as 166.47mm; The injection moulding material quality settings of the 2nd section is 97% of quality of item, and injection-moulding position is set as 14.75mm; The quality of material of the 3rd section of injection moulding is set as 3% of quality of item, and injection-moulding position is set as 10.06mm;
(3) mold cavity is injected after polycarbonate melt, shaping rear cooling and demolding;
(4) adopted by moulded products tempering in hot air circulation to carry out temper, temper technological temperature is 120 DEG C, and tempering time is 15min.
2. the injection moulding process of a kind of polycarbonate glass plate as claimed in claim 1, is characterized in that described in step (2), injection temperature is set as 304 DEG C, nozzle; Injection moulding the 1st section 314 DEG C; Injection moulding the 2nd section 310 DEG C; Injection moulding the 3rd section 300 DEG C.
3. the injection moulding process of a kind of polycarbonate glass plate as claimed in claim 1, is characterized in that injection pressure described in step (2) is injection moulding the 1st section of 9.6MPa; Injection moulding the 2nd section of 12.5MPa; Injection moulding the 3rd section of 9.0MPa.
4. the injection moulding process of a kind of polycarbonate glass plate as claimed in claim 3, is characterized in that the pressure hold time of described each section is respectively: the 1st period of dwell time is 2s; 2nd period of dwell time is 1.5s; 3rd period of dwell time is 0.5s.
5. the injection moulding process of a kind of polycarbonate glass plate as claimed in claim 1, is characterized in that the temperature of model described in step (3) is 110 ~ 120 DEG C.
6. the injection moulding process of a kind of polycarbonate glass plate as claimed in claim 1, is characterized in that described in step (3), cool time is 38 ~ 42s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739038.0A CN104647678A (en) | 2014-12-08 | 2014-12-08 | Injection molding method for polycarbonate glass plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410739038.0A CN104647678A (en) | 2014-12-08 | 2014-12-08 | Injection molding method for polycarbonate glass plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104647678A true CN104647678A (en) | 2015-05-27 |
Family
ID=53239557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410739038.0A Pending CN104647678A (en) | 2014-12-08 | 2014-12-08 | Injection molding method for polycarbonate glass plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104647678A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105365149A (en) * | 2015-12-11 | 2016-03-02 | 滁州市博康模具塑料有限公司 | ABS (acrylonitrile butadiene styrene) material injection molding process |
| CN106626297A (en) * | 2016-12-14 | 2017-05-10 | 武汉通畅汽车电子照明有限公司 | Injection molding process for eliminating shrinkage marks and shrinkage cavities of thick-wall light guide piece during manufacturing of automobile lamps |
| CN107163535A (en) * | 2017-06-05 | 2017-09-15 | 岳西县同兴尼龙橡胶制品有限公司 | A kind of PC cowls injection moulding process |
| CN108995135A (en) * | 2018-07-27 | 2018-12-14 | 华域视觉科技(上海)有限公司 | Lens Shooting Technique and lens |
| CN111844597A (en) * | 2020-05-29 | 2020-10-30 | 惠州市银新鹏科技有限公司 | Polycarbonate material injection molding process |
-
2014
- 2014-12-08 CN CN201410739038.0A patent/CN104647678A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105365149A (en) * | 2015-12-11 | 2016-03-02 | 滁州市博康模具塑料有限公司 | ABS (acrylonitrile butadiene styrene) material injection molding process |
| CN106626297A (en) * | 2016-12-14 | 2017-05-10 | 武汉通畅汽车电子照明有限公司 | Injection molding process for eliminating shrinkage marks and shrinkage cavities of thick-wall light guide piece during manufacturing of automobile lamps |
| CN107163535A (en) * | 2017-06-05 | 2017-09-15 | 岳西县同兴尼龙橡胶制品有限公司 | A kind of PC cowls injection moulding process |
| CN108995135A (en) * | 2018-07-27 | 2018-12-14 | 华域视觉科技(上海)有限公司 | Lens Shooting Technique and lens |
| CN108995135B (en) * | 2018-07-27 | 2020-10-30 | 华域视觉科技(上海)有限公司 | Injection molding process of lens and lens |
| CN111844597A (en) * | 2020-05-29 | 2020-10-30 | 惠州市银新鹏科技有限公司 | Polycarbonate material injection molding process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
|
| WD01 | Invention patent application deemed withdrawn after publication |