CN202895632U - Squeezing type large-injection quantity injection-molding device - Google Patents
Squeezing type large-injection quantity injection-molding device Download PDFInfo
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- CN202895632U CN202895632U CN 201220396364 CN201220396364U CN202895632U CN 202895632 U CN202895632 U CN 202895632U CN 201220396364 CN201220396364 CN 201220396364 CN 201220396364 U CN201220396364 U CN 201220396364U CN 202895632 U CN202895632 U CN 202895632U
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- 238000002347 injection Methods 0.000 title claims abstract description 143
- 239000007924 injection Substances 0.000 title claims abstract description 143
- 238000001746 injection moulding Methods 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000003860 storage Methods 0.000 claims abstract description 25
- 229920003023 plastic Polymers 0.000 claims description 33
- 239000004033 plastic Substances 0.000 claims description 33
- 238000013459 approach Methods 0.000 claims description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 13
- 238000013461 design Methods 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Abstract
The utility model discloses a squeezing type large-injection quantity injection-molding device. The device comprises a pre-injection material storage mechanism, an injection mechanism, a nozzle (10) and a three-way valve (1), wherein the pre-injection material storage mechanism comprises a pre-plasticizing material cylinder (2), a screw rod (3) and a pre-plasticizing material cylinder (4); the screw rod (3) is arranged in the pre-plasticizing material cylinder (4); the injection mechanism comprises a pre-injection material cylinder (5), an injecting material cylinder (6), a piston rod (8) provided with a piston (7) in a sleeved mode, and an electro-hydraulic system, wherein the piston rod (8) is arranged in the injecting material cylinder (6); the electro-hydraulic system (9) is connected with the piston rod; and the pre-injection storage mechanism and the injection mechanism are both connected with the nozzle by the three-way valve. Procedures of a preparation stage, a pre-plasticization stage and an injection stage are performed. The squeezing type large-injection quantity injection-molding device disclosed by the utility model can satisfy the requirement on large injection quantity, does not need to design a corresponding injection-molding type according to the injection quantity, has good commonality and wide application range, increases the injection efficiency, saves energy and achieves high efficiency.
Description
Technical field
The utility model relates to the injection machine field, is the large injection volume injection molding apparatus of a kind of extrusion-injection type specifically.
Background technology
In recent years, particularly increasing for the demand of large-scale plastic member along with the expansion of the market demand, meanwhile, also more and more higher for the quality requirement of large-scale component.But the technical deficiency that traditional extrusion-injection type injector exists owing to injector squeezing system usually especially when injection volume exceeds the nominal injection volume, can't meet the demands at all.Because injection volume is subject to the restriction of piston diameter and stroke, higher limit is arranged in actual applications.So for different injection volume requirements, conventional plastic machinery generally needs different injection devices to cooperate, especially the large-scale injection device that large injection volume product needed is corresponding with it, therefore prior art exists versatility poor, the injection device volume is also larger, therefore the nature that consumes energy can increase, and this does not meet efficient, ideas of energy-saving that modern market requires.
The piston type material feeding structure of the squeezing injection of prior art mainly promotes by piston, will penetrate through nozzle by the molten plastic that plastifies and enter into material storage tube from charging aperture.Except defects, also there is following technical problem in prior art: as because there are long length of fit in piston and barrel, so that piston machining accuracy is had relatively high expectations, manufacturing cost is high.Simultaneously, less injection resistance when guaranteeing the piston injection leaves larger gap between piston and barrel, during injection, the molten plastic temperature is very high, and molten plastic is very easily out back to squeeze from piston and barrel gap, be wrapped in piston face, so that the piston movement resistance increment; And it is long that these partial melting plastics are subject to high shear forces, the time of staying repeatedly, causes part burning degraded, affects environment and product quality.The continuous variation of piston movement resistance causes again pistons work unstable.In addition, wrap in the plastics in the piston outside along with the continuous motion of piston, overflow from the barrel rear side, waste material and increasing plant maintenance difficulty.
The utility model content
The technical problems to be solved in the utility model is, provides a kind of injection volume large, applied widely, and the large injection volume injection molding apparatus of energy-efficient extrusion-injection type.
Technical solution of the present utility model is, a kind of large injection volume injection molding apparatus of extrusion-injection type of following structure is provided, comprise and penetrate front material storage mechanism, injection mechanism, nozzle and triple valve, describedly penetrate front material storage mechanism and comprise barrel before the preformed, screw rod and pre-plastic barrel, described screw rod is arranged in the pre-plastic barrel, described injection mechanism comprises barrel before the injection, injects barrel, is arranged with piston rod and the electrohydraulic system of piston, described piston rod is arranged in the injection barrel, and described electrohydraulic system is connected with piston rod; Described front material storage mechanism, the injection mechanism penetrated all is connected with nozzle by triple valve.
Adopt above structure, the utility model compared with prior art has the following advantages: adopt the utility model structure, to penetrate front material storage mechanism, injection mechanism combines effectively through triple valve, penetrate front material storage mechanism and pass through screw rod ceaselessly to the injection mechanism feeding, also as required several times feeding, triple valve is used for Control Nozzle, penetrate conducting and cut-off between front material storage mechanism and the injection mechanism, thereby realization storing, a plurality of processes such as feeding and injection, owing to having cooperated material storage mechanism at injection mechanism, can satisfy the demand of large injection volume, need not the corresponding injection moulding type that how much designs according to injection volume, versatility is good, applied widely, improved injection efficiency, efficient energy-saving.
As improvement, in the described pre-plastics letter the first melt force sensor is installed, be provided with the second melt force sensor in the barrel before the described injection, signal feedback by two melt force sensors is the force value of the two as can be known, the size of force value according to the two is come the rotating speed of adjusting screw(rod), the working condition of piston rod and conducting and the cut-off of triple valve, the design of this Pressure difference feedback can guarantee to penetrate the coordinative coherence of front material storage mechanism and injection mechanism work, thereby has improved stability and the reliability of product.
As improvement, be connected with non-return connecting cylinder between material letter and the triple valve before the described preformed, be provided with check valve in the described non-return connecting cylinder, when the melt pressure in the barrel is greater than the pressure in the pre-plastic barrel before injecting like this, can prevent the adverse current of molten plastic.
As improvement, the outer ring surface of described piston is provided with sealing ring, and described sealing ring fits with the injection material tube inner wall, and piston and the molten plastic of injecting in the barrel are separated; Because sealing ring is very little with the contact area of injection material tube inner wall, the two is so that in the whole course of work, the frictional resistance that piston movement is subject to is much smaller than traditional approach, thereby has reduced a large amount of energy losses, saves operating cost; And not contact between piston and the injection barrel, therefore, much smaller for material and the processing request of piston, manufacture difficulty reduces greatly; The problem that molten plastic overflows has been stopped in the design of sealing ring simultaneously, so that the cleaning of piston and maintenance are more simply laborsaving.
As improvement, be provided with respectively the first approach switch and the second approach switch before and after the described injection material tube inner wall, the setting of approach switch is the stroke for the ease of control piston, thereby more reasonably arranges the operation of each mechanism, shorten the time of injection, and helped the raising of product quality.
As improvement, described injection molding apparatus also comprises controller, described controller comprises processor, A/D change-over circuit, amplifying circuit and the Acquisition Circuit that is electrically connected successively, described Acquisition Circuit is electrically connected with the first approach switch, the second approach switch, the first melt force sensor and the second melt force sensor, describedly penetrate front material storage mechanism and also comprise the Asynchronous Frequency-variable motor-driven, described screw rod is by the Asynchronous Frequency-variable motor-driven, and described Asynchronous Frequency-variable motor is electrically connected with processor; Adopt controller can effectively process and coordinate the work of each sensor and switch, and the initial speed of screw rod can be set and to the adjustment of screw speed.
As improvement, described check valve comprises steel ball and pin, is provided with in non-return connecting cylinder for the taper position that steel ball is installed, and described pin is blocked in steel ball in the taper position; The narrow end at taper position is near barrel before the preformed, and triple valve barrel to the preformed is check valve cut-off direction, otherwise be conducting direction, and pin is installed in the draw-in groove of the front barrel lower end of preformed.
Another technical problem to be solved in the utility model is, provides a kind of injection volume adjustable greatly, applied widely, and the using method of the large injection volume injection molding apparatus of energy-efficient extrusion-injection type.
Another technical solution of the present utility model is, a kind of using method of the large injection volume injection molding apparatus of extrusion-injection type of following steps is provided, and may further comprise the steps:
(1), the preformed stage: 1., the control triple valve makes it be communicated with before the injection barrel before the barrel and preformed, simultaneously before the injection before barrel and the preformed barrel all end with nozzle;
2., preformed is carried out in the rotation of Asynchronous Frequency-variable motor-driven screw rod, molten plastic enters the front barrel of injection and injection barrel through triple valve, until piston retreats under the promotion of molten plastic to the second approach switch place, receive the feedback signal that the second approach switch sends, show and reach the preformed amount, the preformed stage finishes, and enters injection phase;
1., the beginning injection moulding (2), injection phase:, triple valve is in the threeway state, and namely barrel and injection barrel three communicate before nozzle, the injection;
2., the force value that compares the first melt force sensor and the second melt force sensor:
A, when the second melt force sensor greater than the first melt force sensor, then regulate to increase the rotating speed of screw rod by the Asynchronous Frequency-variable motor, until the second melt force sensor is less than the first melt force sensor, the electrohydraulic system piston rod continues reach;
B, when the second melt force sensor less than the first melt force sensor, need not the adjusting screw(rod) rotating speed, electrohydraulic system piston rod reach;
3., screw rod and piston rod work is until injection moulding is finished, and needs again injection moulding, above step begins to circulate.
Adopt above step, the utility model compared with prior art has the following advantages: adopt the utility model method, to penetrate front material storage mechanism, injection mechanism combines effectively through triple valve, penetrate front material storage mechanism and pass through screw rod ceaselessly to the injection mechanism feeding, also as required several times feeding, triple valve is used for Control Nozzle, penetrate conducting and cut-off between front material storage mechanism and the injection mechanism, thereby realization storing, a plurality of processes such as feeding and injection, owing to having cooperated material storage mechanism at injection mechanism, can satisfy the demand of large injection volume, need not the corresponding injection moulding type that how much designs according to injection volume, versatility is good, applied widely, improved injection efficiency, efficient energy-saving; Simultaneously because the existence in pressure reduction judgement stage in the injection process, by signal feedback regulation and control triple valve, make it be in three-port structure, be that injection stage has injection barrel and the interior two-part molten plastic of pre-plastic barrel to penetrate from nozzle simultaneously, and because the non-return effect of check valve, even injection pressure is large again, can not cause molten plastic to be back to pre-plastic barrel from the injection barrel yet; Control procedure increases and has guaranteed large injection volume, is equivalent to also just change the formed product cycle, has improved production efficiency, has saved cost, in the shortening of molding time, has greatly improved product quality.
1., judge by the first approach switch whether piston is in and inject material tube inner wall foremost, if then enter the preformed stage as improvement, also had the preparatory stage of following steps before the stage at the preformed of step 1:; If not, then control the reach of electrohydraulic system piston rod, until the feedback signal that the piston that obtains to be sent by the first approach switch has put in place stops piston rod work again, and enters the preformed stage; Owing to arranging from judging and the preparatory stage not only can be used as the sign that system begins to enter circulation, can also be with the last time in machine remaining clout, waste material emptying.
As improvement, receive and process the feedback signal of the second melt force sensor, the first melt force sensor, the first approach switch and the second approach switch by controller, preset and regulate simultaneously the rotating speed of Asynchronous Frequency-variable motor, can grasp easily the information of each sensor and switch by controller, handle it simultaneously, formed the Pressure difference feedback to injection device.
Description of drawings
Fig. 1 is the structural representation of the large injection volume injection molding apparatus of extrusion-injection type of the present utility model.
Fig. 2 is the structural representation of sealing ring.
Fig. 3 is the structural representation of non-return connecting cylinder and check valve.
Fig. 4 is the process principle figure of the utility model work.
Fig. 5 is the control flow block diagram of controller.
As shown in the figure: 1, triple valve, 2, barrel before the preformed, 3, screw rod, 4, pre-plastic barrel, 5, barrel before the injection, 6, the injection barrel, 7, piston, 8, piston rod, 9, electrohydraulic system, 10, nozzle, 11, non-return connecting cylinder, 12, sealing ring, 13, Asynchronous Frequency-variable motor, 14, steel ball, 15, pin, 16, the taper position.P
1, the first melt force sensor, P
2, the second melt force sensor, K
1, the first approach switch, K
2, the second approach switch.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the large injection volume injection molding apparatus of extrusion-injection type of the present utility model, comprise and penetrate front material storage mechanism, injection mechanism, nozzle 10 and triple valve 1, describedly penetrate front material storage mechanism and comprise barrel 2 before the preformed, screw rod 3 and pre-plastic barrel 4, described screw rod 3 is arranged in the pre-plastic barrel 4, described injection mechanism comprises the front barrel 5 of injection, injection barrel 6, the piston rod 8 that is arranged with piston 7 and electrohydraulic system 9, described piston rod 8 is arranged in the injection barrel 6, and described electrohydraulic system 9 is connected with piston rod 8; Described front material storage mechanism, the injection mechanism penetrated all is connected with nozzle 10 by triple valve 1.
The first melt force sensor P is installed in the described pre-plastic barrel 4
1, be provided with the second melt force sensor P in the barrel before the described injection
2
Be connected with non-return connecting cylinder 11 between barrel 2 and the triple valve 1 before the described preformed, be provided with check valve in the described non-return connecting cylinder 11.
The outer ring surface of described piston 8 is provided with sealing ring 12, and described sealing ring 12 fits with injection barrel 6 inwalls, and piston 8 and the molten plastic of injecting in the barrel 6 are separated.
Be provided with respectively the first approach switch K before and after described injection barrel 6 inwalls
1With the second approach switch K
2
Described injection molding apparatus also comprises controller, and described controller comprises processor, A/D change-over circuit, amplifying circuit and the Acquisition Circuit that is electrically connected successively, described Acquisition Circuit and the first approach switch K
1, the second approach switch K
2, the first melt force sensor P
1With the second melt force sensor P
2Be electrically connected, describedly penetrate front material storage mechanism and also comprise Asynchronous Frequency-variable motor 13, described screw rod 3 is driven by Asynchronous Frequency-variable motor 13, and described Asynchronous Frequency-variable motor 13 is electrically connected with processor.
Described check valve comprises steel ball 14 and pin 15, is provided with for the taper position 16 that steel ball 14 is installed in non-return the connection in the letter 11, and described pin 15 is blocked in steel ball 15 in the taper position 16; The narrow end at taper position is near barrel before the preformed, and triple valve barrel to the preformed is check valve cut-off direction, otherwise be conducting direction, and pin is installed in the draw-in groove of the front barrel lower end of preformed.
Electrohydraulic system 9 comprises electric signal processing part and hydraulic power part; Described triple valve also can be described as rotary valve or rotary valve, and by control Electric Machine Control and drive.
The using method of the large injection volume injection molding apparatus of extrusion-injection type of the present utility model may further comprise the steps:
(1), the preformed stage: 1., the control triple valve makes it be communicated with before the injection barrel before the barrel and preformed, simultaneously before the injection before barrel and the preformed barrel all end with nozzle;
2., preformed is carried out in the rotation of Asynchronous Frequency-variable motor-driven screw rod, molten plastic enters the front barrel of injection and injection barrel through triple valve, until piston retreats under the promotion of molten plastic to the second approach switch place, receive the feedback signal that the second approach switch sends, show and reach the preformed amount, the preformed stage finishes, and enters injection phase;
1., the beginning injection moulding (2), injection phase:, triple valve is in the threeway state, and namely barrel and injection barrel three communicate before nozzle, the injection;
2., the force value that compares the first melt force sensor and the second melt force sensor:
A, when the second melt force sensor greater than the first melt force sensor, then regulate to increase the rotating speed of screw rod by the Asynchronous Frequency-variable motor, until the second melt force sensor is less than the first melt force sensor, the electrohydraulic system piston rod continues reach;
B, when the second melt force sensor less than the first melt force sensor, need not the adjusting screw(rod) rotating speed, electrohydraulic system piston rod reach;
3., screw rod and piston rod work is until injection moulding is finished, and needs again injection moulding, above step begins to circulate.
The preparatory stage that also had following steps at the preformed of step 1 before stage: 1., judge by the first approach switch whether piston is in and inject material tube inner wall foremost, if then enter the preformed stage; If not, then control the reach of electrohydraulic system piston rod, until the feedback signal that the piston that obtains to be sent by the first approach switch has put in place stops piston rod work again, and enters the preformed stage; Owing to arranging from judging and the preparatory stage not only can be used as the sign that system begins to enter circulation, can also be with the last time in machine remaining clout, waste material emptying.
Receive and process the feedback signal of the second melt force sensor, the first melt force sensor, the first approach switch and the second approach switch by controller, preset and regulate simultaneously the rotating speed of Asynchronous Frequency-variable motor.
Controller compares by the signal of pressure sensor P1, P2 feedback, controls signal to Asynchronous Frequency-variable motor change screw speed S ' if P2 greater than P1, then sends:
Rotating speed S '=K
sS
1,
S
1Initial velocity rotating speed for screw rod; Ks is the pressure reduction coefficient, mainly by power of motor P, and technological requirement injection volume Q, piston nose pressure P 2 and preformed pressure P 1 determine:
K
s＝F(P，Q，P
2，P
1)
Because even the non-return effect of steel ball is the piston nose pressure P
2Large again, can not cause molten plastic to be back to pre-plastic barrel from the injection barrel yet.
The main performance index of the novel extrusion-injection type adapted to injection system of Pressure difference feedback control:
(1) injection speed 800mm/s;
(2) injection pressure 86.2MPa;
(3) theoretical plasticizing capacity (PE) 180g/s;
(4) theoretical injection rate (PE) 2345g/s.
(5) realize network remote supervision, fault diagnosis and online programming function.
Property indices of the present utility model is particularly useful for the use of the injection forming equipment of super large injection volume requirement.
Below only be described with regard to the utility model preferred embodiment, but can not be interpreted as it is limitations on claims.The utility model not only is confined to above embodiment, and its concrete structure allows to change, can slightly adjust as required such as the installation site of sensor, approach switch, etc.In a word, all various variations of doing in the protection domain of the utility model independent claims are all in protection domain of the present utility model.
Claims (7)
1. large injection volume injection molding apparatus of extrusion-injection type, comprise and penetrate front material storage mechanism, injection mechanism, nozzle (10) and triple valve (1), describedly penetrate front material storage mechanism and comprise barrel (2) before the preformed, screw rod (3) and pre-plastic barrel (4), described screw rod (3) is arranged in the pre-plastic barrel (4), described injection mechanism comprises the front barrel (5) of injection, injection barrel (6), be arranged with piston rod (8) and the electrohydraulic system (9) of piston (7), described piston rod (8) is arranged in the injection barrel (6), and described electrohydraulic system (9) is connected with piston rod (8); Described front material storage mechanism, the injection mechanism penetrated all is connected with nozzle (10) by triple valve (1).
2. the large injection volume injection molding apparatus of extrusion-injection type according to claim 1 is characterized in that: the first melt force sensor (P is installed in the described pre-plastic barrel (4)
1), be provided with the second melt force sensor (P in the barrel before the described injection
2).
3. the large injection volume injection molding apparatus of extrusion-injection type according to claim 1, it is characterized in that: be connected with non-return connecting cylinder (11) between barrel (2) and the triple valve (1) before the described preformed, be provided with check valve in the described non-return connecting cylinder (11).
4. the large injection volume injection molding apparatus of extrusion-injection type according to claim 1, it is characterized in that: the outer ring surface of described piston (8) is provided with sealing ring (12), described sealing ring (12) fits with injection barrel (6) inwall, and the molten plastic that piston (8) and injection barrel (6) is interior separates.
5. it is characterized in that according to claim 1 and 2 or the large injection volume injection molding apparatus of 3 described extrusion-injection types: be provided with respectively the first approach switch (K before and after described injection barrel (6) inwall
1) and the second approach switch (K
2).
6. the large injection volume injection molding apparatus of extrusion-injection type according to claim 5, it is characterized in that: described injection molding apparatus also comprises controller, described controller comprises processor, A/D change-over circuit, amplifying circuit and the Acquisition Circuit that is electrically connected successively, described Acquisition Circuit and the first approach switch (K
1), the second approach switch (K
2), the first melt force sensor (P
1) and the second melt force sensor (P
2) be electrically connected, describedly to penetrate front material storage mechanism and also comprise Asynchronous Frequency-variable motor (13), described screw rod (3) is driven by Asynchronous Frequency-variable motor (13), and described Asynchronous Frequency-variable motor (13) is electrically connected with processor.
7. the large injection volume injection molding apparatus of extrusion-injection type according to claim 3, it is characterized in that: described check valve comprises steel ball (14) and pin (15), be provided with in non-return connecting cylinder (11) for the taper position (16) that steel ball (14) is installed, described pin (15) is blocked in steel ball (15) in the taper position (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220396364 CN202895632U (en) | 2012-08-10 | 2012-08-10 | Squeezing type large-injection quantity injection-molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220396364 CN202895632U (en) | 2012-08-10 | 2012-08-10 | Squeezing type large-injection quantity injection-molding device |
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| Publication Number | Publication Date |
|---|---|
| CN202895632U true CN202895632U (en) | 2013-04-24 |
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ID=48116342
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220396364 Expired - Lifetime CN202895632U (en) | 2012-08-10 | 2012-08-10 | Squeezing type large-injection quantity injection-molding device |
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| Country | Link |
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| CN (1) | CN202895632U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909836A (en) * | 2012-08-10 | 2013-02-06 | 泰瑞机器股份有限公司 | Extrusion large-injection amount injection moulding device and use method thereof |
| CN103386750A (en) * | 2013-07-30 | 2013-11-13 | 浙江华业塑料机械有限公司 | Injection molding device for injection molding machine |
-
2012
- 2012-08-10 CN CN 201220396364 patent/CN202895632U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909836A (en) * | 2012-08-10 | 2013-02-06 | 泰瑞机器股份有限公司 | Extrusion large-injection amount injection moulding device and use method thereof |
| CN103386750A (en) * | 2013-07-30 | 2013-11-13 | 浙江华业塑料机械有限公司 | Injection molding device for injection molding machine |
| CN103386750B (en) * | 2013-07-30 | 2016-03-02 | 浙江华业塑料机械有限公司 | For the injection moulding apparatus in injection machine |
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Granted publication date: 20130424 |
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