CN102825746A - Injection molding mold of container plastic part and injection molding method thereof - Google Patents
Injection molding mold of container plastic part and injection molding method thereof Download PDFInfo
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- CN102825746A CN102825746A CN2012103366097A CN201210336609A CN102825746A CN 102825746 A CN102825746 A CN 102825746A CN 2012103366097 A CN2012103366097 A CN 2012103366097A CN 201210336609 A CN201210336609 A CN 201210336609A CN 102825746 A CN102825746 A CN 102825746A
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- 239000004033 plastic Substances 0.000 title claims abstract description 91
- 229920003023 plastic Polymers 0.000 title claims abstract description 91
- 238000001746 injection moulding Methods 0.000 title claims abstract description 49
- 238000002347 injection Methods 0.000 claims abstract description 41
- 239000007924 injection Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims description 19
- 230000008676 import Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012913 prioritisation Methods 0.000 description 2
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
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Abstract
The invention provides an injection molding mold of a container plastic part. A moving mold is provided with at least two pushing rods at the peripheral position along the outer diameter of a mold core of the moving mold; the pushing rods can move along pushing-rod sliding way holes of the moving mold and are internally provided with flow channel holes for leading in compressed air; the flowing channel holes bend from the final ends to the direction of the axis, and outlets are formed at the corresponding side walls of the pushing rods; when the pushing rods move to the set distance along the pushing-rod sliding way holes, and the outlets of the flow channel holes are communicated with a demolding space formed between the mold core and the container plastic part by movement of the pushing rods. An injection method comprises the following steps: the pushing rods move to the direction of a fixed mold along the pushing-rod sliding way holes, and simultaneously the compressed air is led into the flow channel holes; along with the movement of the pushing rods to the direction of the fixed mold, the plastic part separates from the mold core of the moving mold, simultaneously the compressed air enters the demolding space, and the compressed air in the demolding space further pushes the plastic part to separate from the mold core of the moving mold, so that the demolding action is quickly and fully finished.
Description
Technical field
The present invention relates to a kind of injection mold and injection moulding process thereof of container class working of plastics; Especially its mould emptier and release method thereof.
Background technology
The container class working of plastics generally adopts injection mold and Shooting Technique manufacturing, because the container class working of plastics has certain degree of depth, often has demoulding difficulty or because of time-consuming long injection moulding production efficiency that influences of the demouldingization.Prior art also has utilizes compressed air to carry out the demoulding; But be mostly to let a certain position of working of plastics product of the firm depanning of the direct frontal impact of compressed air, disclose a kind of compressed-air ejection method and mould structure scheme thereof of injection mould like Chinese patent document CN1473696A, it is in the middle of core, to offer the valve chamber; Accomplish in injection moulding; Dynamic model and cover half separately after, compressed air is injected the joint portion of core top and product, utilize air pressure that product is ejected.But, prove that in actual injection moulding production practices it is insecure relying on compressed-air ejection merely, especially for the darker container class working of plastics of inner chamber, often be difficult to accomplish smoothly demoulding action; In addition, through the valve chamber that is opened in the middle of the core compressed air is directly injected the scheme of the joint portion of core top and product, a certain position of the working of plastics product of the firm depanning of the direct frontal impact of compressed air is easy to make distortion of working of plastics product or damage.
PLA plastics (being called for short PLA) have excellent biological compatibility and Bioabsorbable, and good biological degradability, and PLA has best heat resistance in the biodegradable thermoplastic polymer material; Because the raw material of PLA plastics is crops that corn, cereal, potato dry powder, sugarcane etc. are rich in starch, be the ecological new material of the present sustainable regeneration that can comprehensively replace the petrochemical industry plastics that is expected most.Though compare with the plastics of oil or natural gas at present, plant plastics exists manufacturing cost high, and shortcoming such as yielding is not also applied on a large scale more than 60 ℃; But can affirm that along with the fast development of science and technology, plant plastics replaces the petrochemical industry plastics the most comprehensively in the future.The PLA plastics had obtained developing rapidly as a kind of desirable degradable, reproducible novel materials in recent years, went to solve but its Shooting Technique technology equally also also has problems to remain people; The crystallization of the especially heat-resisting level of PLA plastics is consuming time longer, and release property is relatively poor when injection moulding, and the demoulding is difficult to grasp opportunity, and too early, workpiece can be out of shape, and excessively evening, can be stuck in the mould; At present the cycle of the general every mould injection molding of PLA plastics needs 3 minutes approximately, with cycle of the every mould injection molding of general petrochemical industry plastics be to compare about 1 minute, seem that its injection moulding production efficiency is very low.So, how to improve the injection moulding release property of PLA plastics, and then shorten its forming period, improving its injection moulding production efficiency also is the task of top priority.
The present invention solves the especially injection moulding release problems of PLA plastics of container class working of plastics just.
Summary of the invention
Technical problem to be solved by this invention is to the above-mentioned state of the art, and a kind of injection mold and injection moulding process thereof of container class working of plastics is provided; Especially its mould emptier and release method thereof.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
A kind of injection mold of container class working of plastics; Comprise cover half that contains die cavity and the dynamic model that contains core; Core is and the container class working of plastics inner surface of the injection moulding of wanting protrudes shape accordingly; Die cavity is the corresponding recessed shape of container class working of plastics phase surface with the injection moulding of wanting, die cavity and core junction afterwards its separately dead in line and form the molding space of working of plastics, it is characterized in that; Said dynamic model is along at least 2 push rods of circumferential position setting at its core external diameter place; Said push rod can move along the push rod skidway hole that is arranged at dynamic model, is provided for the runner hole that compressed air imports in the said push rod, turns and the formation outlet at the respective side walls place of said push rod to its axis place direction at its terminal in said runner hole; When said push rod when the push rod skidway hole moves to setpoint distance, the outlet in said runner hole with communicate by moving formed demoulding space through said push rod between core, the container class working of plastics.
Said runner hole is arranged at the middle position of said push rod by horizontal direction; Said runner hole belongs to direction vertical turn or banked turn at its terminal to its axis.
Said runner hole is circular-arc turning at its terminal to its axis place direction vertical turn or banked turn.
Said push rod is 2 or 3 or 4 or 5, circumferentially is uniformly distributed with along said dynamic mould core external diameter, and in each push rod, is provided for the runner hole that compressed air imports.
Said push rod is more than 6, circumferentially is uniformly distributed with along said dynamic mould core external diameter, and is chosen in the runner hole that is provided for the compressed air importing in the part push rod by even interval.
Said push rod is replaced by a monoblock type push-plate, and by even interval at least 2 runner holes that are used for the compressed air importing is set in said monoblock type push-plate.
A kind of injection moulding process of container class working of plastics uses aforesaid injection mold and is placed on the horizontal injection press, makes said injection machine and said injection mold accomplish following action step successively:
Step 1, promotion dynamic model and cover half are joined and are formed the molding space of working of plastics;
As the further prioritization scheme of injection moulding process as stated; The temperature sensor that detecting head is the pin type detecting head is installed in said cover half to be connected with the computerized control system of said injection machine with pressure sensor; Said pin type detecting head stretches out at said mold cavity surface; The plastics of said computerized control system in the said molding space that the lasting reception of step 2 pin type detecting head is detected go out the best demoulding by its control computed in software and supply injection machine to carry out opportunity from the temperature and the pressure information of melt to moulding.
A kind of injection moulding process of container class PLA working of plastics adopts aforesaid injection moulding process.
The injection mold of container class working of plastics of the present invention and injection moulding process thereof adopt the push rod linkage manner that combines with compressed air, can effectively improve container class working of plastics injection moulding demolding performace, shorten demoulding required time, raising injection moulding production efficiency.The injection mold of container class working of plastics of the present invention and injection moulding process thereof; Be particularly useful for the injection moulding of PLA plastics; Can improve the plastic injection-moulded demolding performace of PLA greatly; Shorten demoulding required time, can the cycle required time of the general every mould injection molding of PLA plastics be shortened to about 1 minute from present about 3 minutes; In addition, because the present invention makes full use of the features of shape of container class working of plastics, ingenious layout compressed air guiding in channel can avoid compressed air to cause the distortion of working of plastics product or the damage of firm depanning effectively.
Description of drawings
Fig. 1 contains the cover half and the dynamic model brief configuration sketch map that contains core of die cavity for injection mold of the present invention.
Fig. 2 is injection mold dynamic model of the present invention and cover half matched moulds view.
Fig. 3 separates the original state sketch map for dynamic model after the injection mold injection moulding of the present invention with cover half.
The back push rod slides Fig. 4 and compressed air imports view for dynamic model after the injection mold injection moulding of the present invention separates with cover half.
Fig. 5 is that injection mold push rod compressed air runner of the present invention hole is at its terminal vertical turn structure enlarged diagram.
Fig. 6 for injection mold push rod compressed air runner of the present invention hole at its terminal circular-arc vertical turn structure enlarged diagram.
Fig. 7 is that injection mold push rod compressed air runner of the present invention hole is at its terminal banked turn structure enlarged diagram.
Fig. 8 for injection mold push rod compressed air runner of the present invention hole at its terminal circular-arc banked turn structure enlarged diagram.
The specific embodiment
A kind of injection mold of container class working of plastics; Extremely shown in Figure 8 like Fig. 1; Comprise cover half 2 that contains die cavity 1 and the dynamic model 4 that contains core 3; Container class working of plastics 5 inner surfaces that core 3 is with the injection moulding of wanting protrude shape accordingly, and die cavity is the corresponding recessed shape of container class working of plastics outer surface with the injection moulding of wanting, and die cavity 1 and core 2 junctions afterwards its axis X separately overlap and form the molding space 6 of working of plastics 5; Dynamic model 4 is along at least 2 push rods of circumferential position setting at its core 3 external diameters place; Push rod 7 can move along the push rod skidway hole 8 that is arranged at dynamic model 4, is provided for the runner hole 9 that compressed air imports in the push rod 7, turns and the formation outlet 10 at the respective side walls place of push rod 7 to its axis X place direction at its terminal in runner hole 9; When push rod 7 when push rod skidway hole 8 moves to setpoint distance, the outlet 10 in runner hole 9 with communicate by moving formed demoulding space 11 through push rod 7 between core 3, the container class working of plastics 5, as shown in Figure 4.
All push rods 7 also can be replaced by a monoblock type push-plate, and by even interval at least 2 runner holes that are used for the compressed air importing are set in said monoblock type push-plate; Correspondingly, all push rod skidway holes 8 are also replaced by a monoblock type push-plate slideway, and the monoblock type push-plate can be along moving in the monoblock type push-plate slideway that is arranged at dynamic model 4.
The injection moulding process of container class working of plastics: use aforesaid injection mold and be placed on the horizontal injection press; Original state cover half 2 separates with dynamic model 4; Die cavity 1 overlaps with the axis X of core 2, and is as shown in Figure 1, makes injection machine and injection mold accomplish following action step successively:
Step 1, promotion dynamic model 4 are joined with cover half 2 and formed the molding space 6 of working of plastics, and be as shown in Figure 2;
Compressed air is directly injected the joint portion of core top and product with the background technology part is described through being opened in the middle valve chamber of core; The scheme at a certain position of the working of plastics product of the firm depanning of the compressed air direct frontal impact of meeting is different; The gap 14 that compressed air of the present invention is flowed through and formed by between the madial wall 51 of working of plastics 5 and the core 3 oblique sidewalls by outlet 10 does not have the madial wall 51 of direct frontal impact working of plastics 5; Compressed air get into again by between core 3, the working of plastics 5 in push rod 7 moves formed demoulding space 11, in the demoulding space 11 working of plastics 5 is formed equally distributed thrust F, as shown in Figure 4; The thrust F that forms like this is even and soft concerning the working of plastics 5 of firm depanning, can avoid compressed air to cause the distortion of working of plastics product or the damage of firm depanning effectively.
As the further prioritization scheme of injection moulding process as stated; The temperature sensor 12 that detecting head is the pin type detecting head is installed in cover half 2 to be connected with the computerized control system of injection machine with pressure sensor 13; The pin type detecting head stretches out on die cavity 1 surface; The plastics of computerized control system in the molding space 6 that the lasting reception of step 2 pin type detecting head is detected go out the best demoulding by its control computed in software and supply injection machine to carry out opportunity from the temperature and the pressure information of melt to moulding.
The injection mold of the above container class working of plastics and injection moulding process thereof can effectively improve container class working of plastics injection moulding demolding performace, shorten demoulding required time, improve injection moulding production efficiency; Be particularly useful for the injection moulding of PLA plastics, can improve the plastic injection-moulded demolding performace of PLA greatly, shorten demoulding required time, can the cycle required time of the general every mould injection molding of PLA plastics be shortened to about 1 minute from present about 3 minutes.
Claims (10)
1. the injection mold of a container class working of plastics; Comprise cover half that contains die cavity and the dynamic model that contains core; Core is and the container class working of plastics inner surface of the injection moulding of wanting protrudes shape accordingly; Die cavity is the corresponding recessed shape of container class working of plastics phase surface with the injection moulding of wanting, die cavity and core junction afterwards its separately dead in line and form the molding space of working of plastics, it is characterized in that; Said dynamic model is along at least 2 push rods of circumferential position setting at its core external diameter place; Said push rod can move along the push rod skidway hole that is arranged at dynamic model, is provided for the runner hole that compressed air imports in the said push rod, turns and the formation outlet at the respective side walls place of said push rod to its axis place direction at its terminal in said runner hole; When said push rod when the push rod skidway hole moves to setpoint distance, the outlet in said runner hole with communicate by moving formed demoulding space through said push rod between core, the container class working of plastics.
2. injection mold as claimed in claim 1 is characterized in that, said runner hole is arranged at the middle position of said push rod by horizontal direction; Said runner hole belongs to direction vertical turn or banked turn at its terminal to its axis.
3. injection mold as claimed in claim 2 is characterized in that, said runner hole is circular-arc turning at its terminal to its axis place direction vertical turn or banked turn.
4. injection mold as claimed in claim 1 is characterized in that, said push rod is 2 or 3 or 4 or 5, circumferentially is uniformly distributed with along said dynamic mould core external diameter, and in each push rod, is provided for the runner hole that compressed air imports.
5. injection mold as claimed in claim 1 is characterized in that, said push rod is more than 6, circumferentially is uniformly distributed with along said dynamic mould core external diameter, and is chosen in the runner hole that is provided for the compressed air importing in the part push rod by even interval.
6. injection mold as claimed in claim 1 is characterized in that, said push rod is replaced by a monoblock type push-plate, and by even interval at least 2 runner holes that are used for the compressed air importing is set in said monoblock type push-plate.
7. the injection moulding process of a container class working of plastics is characterized in that, uses like each described injection mold of claim 1 to 6 and is placed on the horizontal injection press, makes said injection machine and said injection mold accomplish following action step successively:
Step 1, promotion dynamic model and cover half are joined and are formed the molding space of working of plastics;
Step 2, to molding space injected plastic melt, and keep suitable molding time;
Step 3, promotion dynamic model separate with cover half;
Step 4, promotion push rod move to the cover half direction along the push rod skidway hole, and simultaneously with compressed air guiding in channel hole, along with push rod moves to the cover half direction, said working of plastics breaks away from the core of dynamic model, forms the gap between the oblique sidewall of the madial wall of working of plastics and core; Compressed air is flowed through the entering of said gap by moving formed demoulding space through said push rod between core, the container class working of plastics by said outlet simultaneously, moves thereby the said working of plastics of the further promotion of the compressed air in this demoulding space breaks away from the abundant fast completion demoulding of core of dynamic model.
8. injection moulding process as claimed in claim 7; It is characterized in that; The temperature sensor that detecting head is the pin type detecting head is installed in said cover half to be connected with the computerized control system of said injection machine with pressure sensor; Said pin type detecting head stretches out at said mold cavity surface; The plastics of said computerized control system in the said molding space that the lasting reception of step 2 pin type detecting head is detected go out the best demoulding by its control computed in software and supply injection machine to carry out opportunity from the temperature and the pressure information of melt to moulding.
9. the injection moulding process of a container class PLA working of plastics is characterized in that, adopts injection moulding side as claimed in claim 7
Method.
10. the injection moulding process of a container class PLA working of plastics is characterized in that, adopts injection moulding side as claimed in claim 8
Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210336609.7A CN102825746B (en) | 2012-09-01 | 2012-09-01 | Injection molding mold of container plastic part and injection molding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210336609.7A CN102825746B (en) | 2012-09-01 | 2012-09-01 | Injection molding mold of container plastic part and injection molding method thereof |
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| CN102825746A true CN102825746A (en) | 2012-12-19 |
| CN102825746B CN102825746B (en) | 2015-04-15 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104290301A (en) * | 2013-07-18 | 2015-01-21 | 昆山德安模具设计有限公司 | Intelligent injection moulding machine |
| CN109501347A (en) * | 2018-12-03 | 2019-03-22 | 茂泰(福建)鞋材有限公司 | A kind of die device of easy mold release |
| CN109693334A (en) * | 2018-12-29 | 2019-04-30 | 厦门市众昕祺科技有限公司 | A kind of injection molding process of salad service plate |
| CN110053220A (en) * | 2019-03-28 | 2019-07-26 | 江苏雨燕模业科技股份有限公司 | Water purifier plastic front board injection mold |
| CN110978356A (en) * | 2019-11-07 | 2020-04-10 | 罗运宏 | Lens production mould |
| CN112045935A (en) * | 2020-08-09 | 2020-12-08 | 黄家军 | Novel injection mold convenient to drawing of patterns |
| CN115071088A (en) * | 2022-05-30 | 2022-09-20 | 江苏博云塑业股份有限公司 | Method and system for determining demolding time of injection molding process |
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| CN112045935A (en) * | 2020-08-09 | 2020-12-08 | 黄家军 | Novel injection mold convenient to drawing of patterns |
| CN115071088A (en) * | 2022-05-30 | 2022-09-20 | 江苏博云塑业股份有限公司 | Method and system for determining demolding time of injection molding process |
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| CN102825746B (en) | 2015-04-15 |
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Inventor after: Chen Yupeng Inventor before: Chen Qiming |
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Effective date of registration: 20170527 Address after: 519100 Guangdong province Zhuhai City Baijiao village Doumen District Baijiao town Chengchang Wai Shi (Niu Dou) Tang Industrial Zone second, the first two layers Patentee after: ZHUHAI FULIN TECHNOLOGY Co.,Ltd. Address before: Beilun District 315801 of Zhejiang province Ningbo City revitalization of Honglian Xiaogang Road No. 158 room 603 Patentee before: Chen Qiming |
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