CN105346036A - Multicavity mold injection molding process of PC slender rod - Google Patents
Multicavity mold injection molding process of PC slender rod Download PDFInfo
- Publication number
- CN105346036A CN105346036A CN201510901078.5A CN201510901078A CN105346036A CN 105346036 A CN105346036 A CN 105346036A CN 201510901078 A CN201510901078 A CN 201510901078A CN 105346036 A CN105346036 A CN 105346036A
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- CN
- China
- Prior art keywords
- injection
- heated
- mold
- injection tube
- molding process
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- 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
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- 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
- B29C45/26—Moulds
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated 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
- B29C45/77—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
- 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
- B29C2945/76498—Pressure
Abstract
The invention relates to a multicavity mold injection molding process of a PC slender rod. The multicavity mold injection molding process comprises the steps of (1) drying PC raw materials; (2) preparing: heating a fixed mold and a movable mold to 65 DEG C to 85 DEG C; (3) heating an injection tube: heating the first section of the injection tube to 230 DEG C to 250 DEG C, heating the second section of the injection tube to 250 DEG C to 270 DEG C, heating the third section of the injection tube to 270 DEG C to 290 DEG C, and heating an injection nozzle to 270 DEG C to 290 DEG C; (4) hot melting; (5) injecting: injecting hot melting PC plastic in the step (4) into the fixed mold and the movable mold through the injection nozzle, wherein the injection pressure is 120 MPa to 150 MPa, and the injection time is 2 s to 5 s; (6) keeping the pressure of 60 MPa to 90 MPa for 7 s to 11 s; (7) cooling and forming; (8) opening the molds. According to the multicavity mold injection molding process, the average volume shrinkage and the maximum axial deformation of the PC slender rod of which the length-diameter ratio is greater than 15 can be effectively reduced, and the consistency of the product quality is kept.
Description
Technical field
The present invention relates to combination die injection mo(u)lding field, particularly relate to combination die PC elongate rod injection molding process.
Background technology
The uniformity of combination die slender rod type part product quality is the technical vulnerability that the multi-cavity slender rod type part product enterprises such as a class need to overcome, the uniformity of combination die PC elongate rod product and average volumetric shrinkage and maximum axial are out of shape closely related, average volumetric shrinkage is lower to be out of shape less with maximum axial, and the uniformity of combination die PC elongate rod product is better.Based on numerical simulation technology using bar length direction maximum distortion as the evaluation objective of imbalance of flow, by changing the technological parameters such as mold temperature, melt temperature, inject time, dwell pressure, flowing is made to reach acceptable balance, combined by Optimizing Process Parameters and optimize combination die product quality directly or indirectly, the present invention devises combination die PC elongate rod injection molding process according to this thinking.
Summary of the invention
For achieving the above object, provide combination die PC elongate rod injection molding process, the step comprised has in the present invention:
1) PC raw material drying process:
PC plastic pellet is put into the drying that drying baker carries out 4 hours, and drying baker temperature is transferred to 115 DEG C ~ 125 DEG C;
2) preparation:
Injection mold adopts two points of moulds, and install injection mold, and carry out preheating to injection mold, fixed mold is heated to 65 DEG C ~ 85 DEG C, and moving mold is heated to 65 DEG C ~ 85 DEG C;
3) injection tube heating:
Injection tube first paragraph is heated to 230 DEG C ~ 250 DEG C, injection tube second segment is heated to 250 DEG C ~ 270 DEG C, and injection tube the 3rd section is heated to 270 DEG C ~ 290 DEG C, and injection nozzle is heated to 270 DEG C ~ 290 DEG C;
4) hot melt:
PC plastics pretreated in step 1 are added in injection tube, is heated to molten condition;
5) inject:
Be expelled in fixed mold and moving mold by the hot melt PC plastics in step 4 by injection nozzle, injection pressure is 120MPa ~ 150MPa, and inject time is 2s ~ 5s;
6) pressurize:
Dwell pressure is 60MPa ~ 90MPa, and the dwell time is 7s ~ 11s;
7) cooling forming:
Cool time is 5s ~ 15s;
8) die sinking:
Open mould after cooling, take out goods.
The draw ratio of described elongate rod is greater than 15.
Described fixed mold is heated to 85 DEG C, and moving mold is heated to 85 DEG C; Described injection nozzle is heated to 280 DEG C; Described dwell pressure is 70MPa, and the dwell time is 9s.
The invention has the beneficial effects as follows: combination die PC elongate rod injection molding process of the present invention, easy to operate, effectively reduce average volumetric shrinkage and the maximum axial distortion of PC elongate rod, and then the uniformity of the product quality of maintenance PC elongate rod.
Detailed description of the invention
Be described in detail below with reference to embodiments of the invention.
Combination die PC elongate rod injection molding process, the step comprised has:
1) PC raw material drying process:
PC plastic pellet is put into the drying that drying baker carries out 4 hours, and drying baker temperature is transferred to 115 DEG C ~ 125 DEG C;
2) preparation:
Injection mold adopts two points of moulds, and install injection mold, and carry out preheating to injection mold, fixed mold is heated to 65 DEG C ~ 85 DEG C, and moving mold is heated to 65 DEG C ~ 85 DEG C;
3) injection tube heating:
Injection tube first paragraph is heated to 230 DEG C ~ 250 DEG C, injection tube second segment is heated to 250 DEG C ~ 270 DEG C, and injection tube the 3rd section is heated to 270 DEG C ~ 290 DEG C, and injection nozzle is heated to 270 DEG C ~ 290 DEG C;
4) hot melt:
PC plastics pretreated in step 1 are added in injection tube, is heated to molten condition;
5) inject:
Be expelled in fixed mold and moving mold by the hot melt PC plastics in step 4 by injection nozzle, injection pressure is 120MPa ~ 150MPa, and inject time is 2s ~ 5s;
6) pressurize:
Dwell pressure is 60MPa ~ 90MPa, and the dwell time is 7s ~ 11s;
7) cooling forming:
Cool time is 5s ~ 15s;
8) die sinking:
Open mould after cooling, take out goods.
The draw ratio of described elongate rod is greater than 15.
Described fixed mold is heated to 85 DEG C, and moving mold is heated to 85 DEG C; Described injection nozzle is heated to 280 DEG C; Described dwell pressure is 70MPa, and the dwell time is 9s.
Embodiment one
Combination die PC elongate rod injection molding process, the step comprised has:
1) PC raw material drying process:
PC plastic pellet is put into the drying that drying baker carries out 4 hours, and drying baker temperature is transferred to 115 DEG C ~ 125 DEG C;
2) preparation:
Injection mold adopts two points of moulds, and install injection mold, and carry out preheating to injection mold, fixed mold is heated to 65 DEG C, and moving mold is heated to 65 DEG C;
3) injection tube heating:
Injection tube first paragraph is heated to 230 DEG C ~ 250 DEG C, injection tube second segment is heated to 250 DEG C ~ 270 DEG C, and injection tube the 3rd section is heated to 270 DEG C ~ 290 DEG C, and injection nozzle is heated to 270 DEG C;
4) hot melt:
PC plastics pretreated in step 1 are added in injection tube, is heated to molten condition;
5) inject:
Be expelled in fixed mold and moving mold by the hot melt PC plastics in step 4 by injection nozzle, injection pressure is 120MPa ~ 150MPa, and inject time is 2s ~ 5s;
6) pressurize:
Dwell pressure is 60MPa, and the dwell time is 7s;
7) cooling forming:
Cool time is 5s ~ 15s;
8) die sinking:
Open mould after cooling, take out goods.
The draw ratio of described elongate rod is greater than 15.
The average volumetric shrinkage of the combination die PC elongate rod product that technique obtains is 0.9923%, and maximum axial distortion is 0.0154mm.
Embodiment two
Combination die PC elongate rod injection molding process, the step comprised has:
1) PC raw material drying process:
PC plastic pellet is put into the drying that drying baker carries out 4 hours, and drying baker temperature is transferred to 115 DEG C ~ 125 DEG C;
2) preparation:
Injection mold adopts two points of moulds, and install injection mold, and carry out preheating to injection mold, fixed mold is heated to 75 DEG C, and moving mold is heated to 75 DEG C;
3) injection tube heating:
Injection tube first paragraph is heated to 230 DEG C ~ 250 DEG C, injection tube second segment is heated to 250 DEG C ~ 270 DEG C, and injection tube the 3rd section is heated to 270 DEG C ~ 290 DEG C, and injection nozzle is heated to 280 DEG C;
4) hot melt:
PC plastics pretreated in step 1 are added in injection tube, is heated to molten condition;
5) inject:
Be expelled in fixed mold and moving mold by the hot melt PC plastics in step 4 by injection nozzle, injection pressure is 120MPa ~ 150MPa, and inject time is 2s ~ 5s;
6) pressurize:
Dwell pressure is 70MPa, and the dwell time is 9s;
7) cooling forming:
Cool time is 5s ~ 15s;
8) die sinking:
Open mould after cooling, take out goods.
The draw ratio of described elongate rod is greater than 15.
The average volumetric shrinkage of the combination die PC elongate rod product that technique obtains is 0.7258%, and maximum axial distortion is 0.081mm.
Embodiment three
Combination die PC elongate rod injection molding process, the step comprised has:
1) PC raw material drying process:
PC plastic pellet is put into the drying that drying baker carries out 4 hours, and drying baker temperature is transferred to 115 DEG C ~ 125 DEG C;
2) preparation:
Injection mold adopts two points of moulds, and install injection mold, and carry out preheating to injection mold, fixed mold is heated to 85 DEG C, and moving mold is heated to 85 DEG C;
3) injection tube heating:
Injection tube first paragraph is heated to 230 DEG C ~ 250 DEG C, injection tube second segment is heated to 250 DEG C ~ 270 DEG C, and injection tube the 3rd section is heated to 270 DEG C ~ 290 DEG C, and injection nozzle is heated to 290 DEG C;
4) hot melt:
PC plastics pretreated in step 1 are added in injection tube, is heated to molten condition;
5) inject:
Be expelled in fixed mold and moving mold by the hot melt PC plastics in step 4 by injection nozzle, injection pressure is 120MPa ~ 150MPa, and inject time is 2s ~ 5s;
6) pressurize:
Dwell pressure is 80MPa, and the dwell time is 11s;
7) cooling forming:
Cool time is 5s ~ 15s;
8) die sinking:
Open mould after cooling, take out goods.
The draw ratio of described elongate rod is greater than 15.
The average volumetric shrinkage of the combination die PC elongate rod product that technique obtains is 0.1279%, and maximum axial distortion is 0.0082mm.
Embodiment four (optimum embodiment)
Combination die PC elongate rod injection molding process, the step comprised has:
1) PC raw material drying process:
PC plastic pellet is put into the drying that drying baker carries out 4 hours, and drying baker temperature is transferred to 115 DEG C ~ 125 DEG C;
2) preparation:
Injection mold adopts two points of moulds, and install injection mold, and carry out preheating to injection mold, fixed mold is heated to 75 DEG C, and moving mold is heated to 75 DEG C;
3) injection tube heating:
Injection tube first paragraph is heated to 230 DEG C ~ 250 DEG C, injection tube second segment is heated to 250 DEG C ~ 270 DEG C, and injection tube the 3rd section is heated to 270 DEG C ~ 290 DEG C, and injection nozzle is heated to 290 DEG C;
4) hot melt:
PC plastics pretreated in step 1 are added in injection tube, is heated to molten condition;
5) inject:
Be expelled in fixed mold and moving mold by the hot melt PC plastics in step 4 by injection nozzle, injection pressure is 120MPa ~ 150MPa, and inject time is 2s ~ 5s;
6) pressurize:
Dwell pressure is 60MPa, and the dwell time is 7s;
7) cooling forming:
Cool time is 5s ~ 15s;
8) die sinking:
Open mould after cooling, take out goods.
The draw ratio of described elongate rod is greater than 15.
The average volumetric shrinkage 0.1637% of the combination die PC elongate rod product that technique obtains, axial maximum distortion 0.0009mm.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. combination die PC elongate rod injection molding process, is characterized in that, the step comprised has:
1) PC raw material drying process:
PC plastic pellet is put into the drying that drying baker carries out 4 hours, and drying baker temperature is transferred to 115 DEG C ~ 125 DEG C;
2) preparation:
Injection mold adopts two points of moulds, and install injection mold, and carry out preheating to injection mold, fixed mold is heated to 65 DEG C ~ 85 DEG C, and moving mold is heated to 65 DEG C ~ 85 DEG C;
3) injection tube heating:
Injection tube first paragraph is heated to 230 DEG C ~ 250 DEG C, injection tube second segment is heated to 250 DEG C ~ 270 DEG C, and injection tube the 3rd section is heated to 270 DEG C ~ 290 DEG C, and injection nozzle is heated to 270 DEG C ~ 290 DEG C;
4) hot melt:
PC plastics pretreated in step 1 are added in injection tube, is heated to molten condition;
5) inject:
Be expelled in fixed mold and moving mold by the hot melt PC plastics in step 4 by injection nozzle, injection pressure is 120MPa ~ 150MPa, and inject time is 2s ~ 5s;
6) pressurize:
Dwell pressure is 60MPa ~ 90MPa, and the dwell time is 7s ~ 11s;
7) cooling forming:
Cool time is 5s ~ 15s;
8) die sinking:
Open mould after cooling, take out goods;
The draw ratio of described elongate rod is greater than 15.
2. combination die PC elongate rod injection molding process according to claim 1, it is characterized in that, described fixed mold is heated to 85 DEG C, and moving mold is heated to 85 DEG C; Described injection nozzle is heated to 280 DEG C; Described dwell pressure is 70MPa, and the dwell time is 9s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510901078.5A CN105346036A (en) | 2015-12-09 | 2015-12-09 | Multicavity mold injection molding process of PC slender rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510901078.5A CN105346036A (en) | 2015-12-09 | 2015-12-09 | Multicavity mold injection molding process of PC slender rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105346036A true CN105346036A (en) | 2016-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510901078.5A Pending CN105346036A (en) | 2015-12-09 | 2015-12-09 | Multicavity mold injection molding process of PC slender rod |
Country Status (1)
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| CN (1) | CN105346036A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624197A (en) * | 2018-12-06 | 2019-04-16 | 东莞勤德五金制品有限公司 | The fever pedestal processing technology of electronic cigarette |
| CN113878829A (en) * | 2021-08-31 | 2022-01-04 | 东风汽车集团股份有限公司 | Moldflow-based automobile bumper injection molding process method, device and storage medium |
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| DE19824699A1 (en) * | 1998-06-03 | 1999-12-09 | Orga Kartensysteme Gmbh | Injection molding of plastic cards, in particular bank, telephone, identity or similar cards |
| DE102005013879A1 (en) * | 2005-03-24 | 2006-09-28 | Siemens Ag | Coated plastic component injection molding method involves aligning plastic film and section of coated film strip opposite each other in molding tool, closing tool parts and injecting transparent plastic between them |
| CN101863104A (en) * | 2010-05-26 | 2010-10-20 | 大连理工大学 | Injection molding process of plastic microfluidic chip |
| CN103612361A (en) * | 2013-11-23 | 2014-03-05 | 诸暨市泰昂机械有限公司 | Injection molding process |
-
2015
- 2015-12-09 CN CN201510901078.5A patent/CN105346036A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19824699A1 (en) * | 1998-06-03 | 1999-12-09 | Orga Kartensysteme Gmbh | Injection molding of plastic cards, in particular bank, telephone, identity or similar cards |
| DE102005013879A1 (en) * | 2005-03-24 | 2006-09-28 | Siemens Ag | Coated plastic component injection molding method involves aligning plastic film and section of coated film strip opposite each other in molding tool, closing tool parts and injecting transparent plastic between them |
| CN101863104A (en) * | 2010-05-26 | 2010-10-20 | 大连理工大学 | Injection molding process of plastic microfluidic chip |
| CN103612361A (en) * | 2013-11-23 | 2014-03-05 | 诸暨市泰昂机械有限公司 | Injection molding process |
Non-Patent Citations (1)
| Title |
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| 谭小红: "细长杆多腔模注塑成型工艺多因素多目标集成优化", 《中国博士学位论文全文数据库工程科技Ⅰ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624197A (en) * | 2018-12-06 | 2019-04-16 | 东莞勤德五金制品有限公司 | The fever pedestal processing technology of electronic cigarette |
| CN113878829A (en) * | 2021-08-31 | 2022-01-04 | 东风汽车集团股份有限公司 | Moldflow-based automobile bumper injection molding process method, device and storage medium |
| CN113878829B (en) * | 2021-08-31 | 2023-05-12 | 东风汽车集团股份有限公司 | Moldflow-based automobile bumper injection molding process method, equipment and storage medium |
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Application publication date: 20160224 |