CN103302813A - Negative pressure injection molding mold of plastic product and method thereof - Google Patents
Negative pressure injection molding mold of plastic product and method thereof Download PDFInfo
- Publication number
- CN103302813A CN103302813A CN2013102481181A CN201310248118A CN103302813A CN 103302813 A CN103302813 A CN 103302813A CN 2013102481181 A CN2013102481181 A CN 2013102481181A CN 201310248118 A CN201310248118 A CN 201310248118A CN 103302813 A CN103302813 A CN 103302813A
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- negative pressure
- die cavity
- mold
- mould
- injection molding
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009423 ventilation Methods 0.000 claims abstract description 30
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 18
- 230000003434 inspiratory effect Effects 0.000 claims description 7
- 239000002994 raw material Substances 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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Abstract
The invention relates to the technical field of plastic injection molding, and particularly relates to a negative pressure injection molding mold of a plastic product and a method of the mold. The negative pressure injection molding mold comprises a front mold and a back mold, wherein the interior of the front mold is provided with a plurality of mold cavities; the front end surface of the front mold is provided with an additional plate; the additional plate has a plurality of ventilation holes corresponding to the mold cavities respectively; each ventilation hole is respectively communicated with the corresponding mold cavity; the ventilation holes are communicated with each other through ventilation slot ways; and the ventilation slot ways are communicated with an external air compression system. According to the negative pressure injection molding mold, injection molding can be performed on the mold cavity at a negative pressure state, the injection plastic raw material can be quickly filled in the mold cavity, the injection molding efficiency is high, and oxygen in the mold cavity is prevented from reacting with the plastic raw material to cause the plastic raw material to be burnt, so that the performance and surface quality of the plastic product are improved, and precise, small and thin products can be processed through injection molding; and the product can be blown out in a positive pressure air-blowing manner, so that the product is prevented from being adhered on the front mold, deformed and damaged, is easy to demold.
Description
Technical field:
The present invention relates to the plastic-injection field shaping technique, relate in particular to plastic cement products negative pressure injection forming mold and method thereof.
Background technology:
The plastic cement products injection mo(u)lding is a kind of processing method that batch production is used during some complex-shaped parts, and specifically will the be heated material of thawing of finger injects die cavity by high pressure, behind cooling curing, obtains formed products.Existing injection forming mold all carries out injection moulding and the demoulding under normal pressure, during injection moulding, owing to having air in the die cavity, plastic material can't be full of die cavity fast, injection moulding speed is slow, and the oxygen in the die cavity can produce reaction with plastic material, makes the plastic material burn, affect performance and the surface quality of plastic cement products, can't injection molding relatively more accurate, size is less and the product of thin wall type; During the demoulding, because product is easy to be bonded on the front mould, is not easy the demoulding, and all is to utilize thimble directly product to be ejected, easily cause deformation of products and damage.
Summary of the invention:
Purpose of the present invention is exactly the deficiency that exists for prior art and provide a kind of and can enhance product performance and surface quality, improve the plastic cement products negative pressure injection forming mold of injection moulding efficient, and the plastic cement products negative pressure injection molding forming method of this mould also is provided.
To achieve these goals, the technical solution used in the present invention is:
Plastic cement products negative pressure injection forming mold, the rear mold that include front mould, matches with front mould, rear mold is arranged on the front mould rear end face, front mould inside is provided with a plurality of die cavities, the front end face of front mould is provided with add-in card, offers a plurality of respectively passages corresponding with a plurality of die cavities on the add-in card, and each passage is communicated with corresponding die cavity respectively, be interconnected by the ventilation tank circuit between a plurality of passages, the ventilation tank circuit is communicated with the extraneous air compressibility.
Described front mould inside is provided with a plurality of core rods, and core rod is arranged on front mould inside with removably, and die cavity is arranged in the core rod.
Described core rod includes outer core and is arranged at least one combination inner core of outer core front end inside, mutually enclose the formation die cavity between combination inner core and the outer core, set screw has been threaded in the passage, push up on the combination inner core that is pressed in foremost the rear end of set screw, set screw is hollow tubular structures, and the two ends of set screw hollow lumen are communicated with passage, die cavity respectively.
Described outer core is threaded in front mould inside by the external screw thread mode.
The described ventilation tank circuit is arranged on the front end face of add-in card, offers many air inlet ducts on the rear end face of add-in card, is distributed with a plurality of passages that are communicated with it on every air inlet duct.
The even parallel arrangement of described many air inlet ducts.
Described add-in card is provided with the ventilation interface, and the ventilation tank circuit is communicated with the extraneous air compressibility by the ventilation interface, is connected with reversal valve between ventilation interface and the extraneous air compressibility.
The front end face of described add-in card is provided with hot-runner device.
The present invention also provides plastic cement products negative pressure injection molding forming method, may further comprise the steps:
A, utilize air compression system to produce the negative inspiratory pressure state, with the air sucking-off in the mould die cavity, make and form negative pressure in the die cavity;
B, the plastic material of molten condition is injected die cavity by the sprue gate of mould, make plastic material be full of die cavity and form product;
When C, the demoulding, utilize air compression system to produce malleation air blowing state, in the mould die cavity, blow, make product break away from front mould.
Described air compression system is communicated with the mould die cavity by the vent line system, and air compression system switches between negative inspiratory pressure state and malleation air blowing state by reversal valve.
Beneficial effect of the present invention is: the present invention includes front mould, rear mold, rear mold is arranged on the front mould rear end face, front mould inside is provided with a plurality of die cavities, the front end face of front mould is provided with add-in card, offer a plurality of respectively passages corresponding with a plurality of die cavities on the add-in card, each passage is communicated with corresponding die cavity respectively, be interconnected by the ventilation tank circuit between a plurality of passages, the ventilation tank circuit is communicated with the extraneous air compressibility, the present invention utilizes first air compression system that the air sucking-off in the mould die cavity is formed negative pressure, then the plastic material injection die cavity with molten condition forms product, during the demoulding, utilize air compression system in the mould die cavity, to blow, make product break away from front mould, the present invention can make die cavity carry out injection moulding under negative pressure state, the injection moulding plastic raw material can be full of die cavity fast, injection moulding efficient is high, and avoid in the die cavity oxygen and plastic material to produce reaction and make the plastic material burn, improve performance and the surface quality of plastic cement products, can injection molding relatively more accurate, the product of the less and thin wall type of size; Can utilize the malleation blowing method that product is blown out, prevent that product is bonded on the front mould, prevents deformation of products and damage, the demoulding is easy.
Description of drawings:
Fig. 1 is internal structure schematic diagram of the present invention.
Fig. 2 is the rearview of add-in card of the present invention.
Fig. 3 is the structural representation of core rod of the present invention.
The specific embodiment:
The invention will be further described below in conjunction with accompanying drawing and preferred embodiment, see shown in Fig. 1～3, plastic cement products negative pressure injection forming mold includes front mould 1, the rear mold 2 that matches with front mould 1, rear mold 2 is arranged on front mould 1 rear end face, front mould 1 inside is provided with a plurality of die cavities 10, the front end face of front mould 1 is provided with add-in card 3, offer a plurality of respectively passages 31 corresponding with a plurality of die cavity 10 on the add-in card 3, each passage 31 is communicated with corresponding die cavity 10 respectively, be interconnected by the ventilation tank circuit 32 between a plurality of passages 31, the ventilation tank circuit 32 is communicated with the extraneous air compressibility.The present invention utilizes first air compression system that the air sucking-off in the mould die cavity 10 is formed negative pressure, then the plastic material injection die cavity 10 with molten condition forms product, during the demoulding, utilize air compression system in mould die cavity 10, to blow, make product break away from front mould 1, the present invention can make die cavity 10 carry out injection moulding under negative pressure state, the injection moulding plastic raw material can be full of die cavity 10 fast, injection moulding efficient is high, and avoid in the die cavity 10 oxygen and plastic material to produce reaction and make the plastic material burn, improve performance and the surface quality of plastic cement products, can injection molding relatively more accurate, the product of the less and thin wall type of size; Can utilize the malleation blowing method that product is blown out, prevent that product is bonded on the front mould 1, prevents deformation of products and damage, the demoulding is easy.
The ventilation tank circuit 32 is arranged on the front end face of add-in card 3, offer many air inlet ducts 33 on the rear end face of add-in card 3, be distributed with a plurality of passages that are communicated with it 31 on every air inlet duct 33, the ventilation tank circuit 32, passage 31, air inlet duct 33 are combined to form the vent line system, make gas pressure distribution even, the air pressure of each passage 31 is identical.Many air inlet duct 33 even parallel arrangements make gas pressure distribution more even.Add-in card 3 is provided with ventilation interface 34, the ventilation tank circuit 32 is communicated with the extraneous air compressibility by ventilation interface 34, be connected with reversal valve between ventilation interface 34 and the extraneous air compressibility, air compression system switches between negative inspiratory pressure state and malleation air blowing state by reversal valve.
The front end face of add-in card 3 is provided with hot-runner device 6.Be tightly connected by sealing ring 7 respectively between add-in card 3 and front mould 1, the hot-runner device 6, prevent gas leakage.
The present invention also provides plastic cement products negative pressure injection molding forming method, air compression system is communicated with mould die cavity 10 by the vent line system, air compression system switches between negative inspiratory pressure state and malleation air blowing state by reversal valve, and its concrete steps are as follows:
One, utilizes air compression system to produce the negative inspiratory pressure state, with the air sucking-off in the mould die cavity 10, make die cavity 10 interior formation negative pressure, as making die cavity 10 interior formation vacuum;
Two, the plastic material with molten condition injects die cavity 10 by the sprue gate of mould, makes plastic material be full of die cavity 10 and forms product;
Three, after the product cooled and solidified in the die cavity 10, during the demoulding, the reversal valve switching direction utilizes air compression system to produce malleation air blowing state, blows in mould die cavity 10, makes product break away from front mould 1.
The air compression system work that can after die cavity 10 is inhaled negative pressure, just stop suction, and then carry out the injection moulding work of step 2; Air compression system also can continue to continue air-breathing work after die cavity 10 is inhaled negative pressure, and the injection moulding work of step 2 is carried out on air-breathing limit, limit, and to finishing the work that stops suction again after the injection moulding work, injection moulding is effective.
Utilize method of the present invention can make die cavity 10 under negative pressure state, carry out injection moulding, the injection moulding plastic raw material can be full of die cavity 10 fast, injection moulding efficient is high, and avoid in the die cavity 10 oxygen and plastic material to produce reaction and make the plastic material burn, improve performance and the surface quality of plastic cement products, can injection molding relatively more accurate, size is less and the product of thin wall type; The present invention utilizes the malleation blowing method that product is blown out, and prevents that product is bonded on the front mould 1, prevents deformation of products and damage, and the demoulding is easy.
Certainly, the above only is preferred embodiment of the present invention, therefore all equivalences of doing according to the described structure of patent claim of the present invention, feature and principle change or modify, is included in the patent claim of the present invention.
Claims (10)
1. plastic cement products negative pressure injection forming mold, include front mould (1), the rear mold (2) that matches with front mould (1), rear mold (2) is arranged on front mould (1) rear end face, front mould (1) inside is provided with a plurality of die cavities (10), it is characterized in that: the front end face of described front mould (1) is provided with add-in card (3), offer a plurality of respectively passages (31) corresponding with a plurality of die cavities (10) on the add-in card (3), each passage (31) is communicated with corresponding die cavity (10) respectively, be interconnected by the ventilation tank circuit (32) between a plurality of passages (31), the ventilation tank circuit (32) is communicated with the extraneous air compressibility.
2. plastic cement products negative pressure injection forming mold according to claim 1, it is characterized in that: described front mould (1) inside is provided with a plurality of core rods (4), core rod (4) is arranged on front mould (1) inside with removably, and die cavity (10) is arranged in the core rod (4).
3. plastic cement products negative pressure injection forming mold according to claim 2, it is characterized in that: described core rod (4) includes outer core (41) and is arranged at least one combination inner core (42) of outer core (41) front end inside, mutually enclose between combination inner core (42) and the outer core (41) and form die cavity (10), the set screw that has been threaded in the passage (31) (5), push up on the combination inner core (42) that is pressed in foremost the rear end of set screw (5), set screw (5) is hollow tubular structures, the two ends of set screw (5) hollow lumen respectively with passage (31), die cavity (10) is communicated with.
4. plastic cement products negative pressure injection forming mold according to claim 2, it is characterized in that: described outer core (41) is threaded in front mould (1) inside by the external screw thread mode.
5. plastic cement products negative pressure injection forming mold according to claim 1, it is characterized in that: the described ventilation tank circuit (32) is arranged on the front end face of add-in card (3), offer many air inlet ducts (33) on the rear end face of add-in card (3), be distributed with a plurality of passages that are communicated with it (31) on every air inlet duct (33).
6. plastic cement products negative pressure injection forming mold according to claim 5 is characterized in that: the even parallel arrangement of described many air inlet ducts (33).
7. plastic cement products negative pressure injection forming mold according to claim 1, it is characterized in that: described add-in card (3) is provided with ventilation interface (34), the ventilation tank circuit (32) is communicated with the extraneous air compressibility by ventilation interface (34), is connected with reversal valve between ventilation interface (34) and the extraneous air compressibility.
8. the described plastic cement products negative pressure of any one injection forming mold according to claim 1～7, it is characterized in that: the front end face of described add-in card (3) is provided with hot-runner device (6).
9. plastic cement products negative pressure injection molding forming method is characterized in that, may further comprise the steps:
A, utilize air compression system to produce the negative inspiratory pressure state, with the air sucking-off in the mould die cavity, make and form negative pressure in the die cavity;
B, the plastic material of molten condition is injected die cavity by the sprue gate of mould, make plastic material be full of die cavity and form product;
When C, the demoulding, utilize air compression system to produce malleation air blowing state, in the mould die cavity, blow, make product break away from front mould.
10. plastic cement products negative pressure injection molding forming method according to claim 9, it is characterized in that: described air compression system is communicated with the mould die cavity by the vent line system, and air compression system switches between negative inspiratory pressure state and malleation air blowing state by reversal valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310248118.1A CN103302813B (en) | 2013-06-20 | 2013-06-20 | Plastic cement products negative pressure injection forming mold and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310248118.1A CN103302813B (en) | 2013-06-20 | 2013-06-20 | Plastic cement products negative pressure injection forming mold and method thereof |
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| Publication Number | Publication Date |
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| CN103302813A true CN103302813A (en) | 2013-09-18 |
| CN103302813B CN103302813B (en) | 2016-03-09 |
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| CN201310248118.1A Active CN103302813B (en) | 2013-06-20 | 2013-06-20 | Plastic cement products negative pressure injection forming mold and method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103587058A (en) * | 2013-11-04 | 2014-02-19 | 高精科技(苏州)有限公司 | Pen core plastic mould for electronic pens |
| CN103624921A (en) * | 2013-11-21 | 2014-03-12 | 宁波索普橡塑有限公司 | Manufacturing method for shock-absorbing foot mats of washing machine |
| CN103991165A (en) * | 2014-06-09 | 2014-08-20 | 钟灿秋 | Injection molding method of PCR (Polymerase Chain Reaction) plate |
| CN104015306A (en) * | 2014-06-09 | 2014-09-03 | 钟灿秋 | Injection molding die and method for PCR (polymerase chain reaction) plates |
| CN105108977A (en) * | 2015-09-29 | 2015-12-02 | 京东方光科技有限公司 | Injection mold and light guide plate manufacturing device |
| CN107283714A (en) * | 2017-07-09 | 2017-10-24 | 东莞市中萃模具塑胶科技有限公司 | Mobile phone plastic part negative pressure precision injection molding method |
| CN108819094A (en) * | 2018-07-18 | 2018-11-16 | 太仓市众翔精密五金有限公司 | A kind of the quick injection molding technique and mold of complex precise notebook computer casing |
| CN110001011A (en) * | 2019-04-16 | 2019-07-12 | 上饶师范学院 | Multi-layer porous formula extraneous gas aided injection mould mould |
| CN111688119A (en) * | 2020-05-14 | 2020-09-22 | 周斌 | Injection mold structure |
| CN112406041A (en) * | 2020-10-30 | 2021-02-26 | 刘前勇 | Injection mold with adjustable core pulling length |
| CN115320073A (en) * | 2022-10-12 | 2022-11-11 | 南通宸康新材料科技有限公司 | Plastic suction mold and demolding method thereof |
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| JP2010083025A (en) * | 2008-09-30 | 2010-04-15 | Konica Minolta Opto Inc | Method for manufacturing optical element and metallic mold for molding optical element |
| CN202727275U (en) * | 2012-07-05 | 2013-02-13 | 北京康特荣宝电子有限公司 | Precise rubber frame mold using driving exhaust and seamless ejection system |
| CN203381128U (en) * | 2013-06-20 | 2014-01-08 | 钟灿秋 | Negative-pressure injection mould for plastic products |
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| JP2010083025A (en) * | 2008-09-30 | 2010-04-15 | Konica Minolta Opto Inc | Method for manufacturing optical element and metallic mold for molding optical element |
| CN202727275U (en) * | 2012-07-05 | 2013-02-13 | 北京康特荣宝电子有限公司 | Precise rubber frame mold using driving exhaust and seamless ejection system |
| CN203381128U (en) * | 2013-06-20 | 2014-01-08 | 钟灿秋 | Negative-pressure injection mould for plastic products |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103587058A (en) * | 2013-11-04 | 2014-02-19 | 高精科技(苏州)有限公司 | Pen core plastic mould for electronic pens |
| CN103624921B (en) * | 2013-11-21 | 2017-01-04 | 宁波索普橡塑有限公司 | A kind of manufacture method for washing machine shock-absorbing foot pad |
| CN103624921A (en) * | 2013-11-21 | 2014-03-12 | 宁波索普橡塑有限公司 | Manufacturing method for shock-absorbing foot mats of washing machine |
| CN103991165A (en) * | 2014-06-09 | 2014-08-20 | 钟灿秋 | Injection molding method of PCR (Polymerase Chain Reaction) plate |
| CN104015306A (en) * | 2014-06-09 | 2014-09-03 | 钟灿秋 | Injection molding die and method for PCR (polymerase chain reaction) plates |
| US10562216B2 (en) | 2015-09-29 | 2020-02-18 | Boe Technology Group Co., Ltd. | Injection mold and device for preparation of light guide plate |
| CN105108977A (en) * | 2015-09-29 | 2015-12-02 | 京东方光科技有限公司 | Injection mold and light guide plate manufacturing device |
| CN107283714A (en) * | 2017-07-09 | 2017-10-24 | 东莞市中萃模具塑胶科技有限公司 | Mobile phone plastic part negative pressure precision injection molding method |
| CN108819094A (en) * | 2018-07-18 | 2018-11-16 | 太仓市众翔精密五金有限公司 | A kind of the quick injection molding technique and mold of complex precise notebook computer casing |
| CN110001011A (en) * | 2019-04-16 | 2019-07-12 | 上饶师范学院 | Multi-layer porous formula extraneous gas aided injection mould mould |
| CN110001011B (en) * | 2019-04-16 | 2024-03-08 | 上饶师范学院 | Multi-layer porous external air auxiliary injection mould |
| CN111688119A (en) * | 2020-05-14 | 2020-09-22 | 周斌 | Injection mold structure |
| CN112406041A (en) * | 2020-10-30 | 2021-02-26 | 刘前勇 | Injection mold with adjustable core pulling length |
| CN115320073A (en) * | 2022-10-12 | 2022-11-11 | 南通宸康新材料科技有限公司 | Plastic suction mold and demolding method thereof |
| CN115320073B (en) * | 2022-10-12 | 2022-12-30 | 南通宸康新材料科技有限公司 | Plastic suction mold and demolding method thereof |
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| CN103302813B (en) | 2016-03-09 |
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Effective date of registration: 20150924 Address after: 523000 Guangdong city of Dongguan province Shijie Zhen Shui Nan Chen Wu Cun industrial area C C02 Applicant after: DONGGUAN JIJIAN BIOTECHNOLOGY Co.,Ltd. Address before: 523000, Guangdong, Dongguan province Shijie Town Road, Chung Chen Industrial Zone bell Sheng mold factory Applicant before: Zhong Canqiu |
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Effective date of registration: 20170410 Address after: 523000 Guangdong city of Dongguan province Shijie Zhen Shui Nan Chen Wu Tong Fu Road No. 153 first floor Patentee after: DONGGUAN ZHONGCUI MOLD PLASTIC TECHNOLOGY CO.,LTD. Address before: 523000 Guangdong city of Dongguan province Shijie Zhen Shui Nan Chen Wu Cun industrial area C C02 Patentee before: DONGGUAN JIJIAN BIOTECHNOLOGY Co.,Ltd. |
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Denomination of invention: Negative pressure injection molding mold of plastic product and method thereof Effective date of registration: 20180330 Granted publication date: 20160309 Pledgee: China Co. truction Bank Corp Dongguan Shijie branch Pledgor: DONGGUAN ZHONGCUI MOLD PLASTIC TECHNOLOGY CO.,LTD. Registration number: 2018440000078 |
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Date of cancellation: 20230417 Granted publication date: 20160309 Pledgee: China Co. truction Bank Corp Dongguan Shijie branch Pledgor: DONGGUAN ZHONGCUI MOLD PLASTIC TECHNOLOGY CO.,LTD. Registration number: 2018440000078 |
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