CN101214721A - Injection device of milling injection molding machine - Google Patents
Injection device of milling injection molding machine Download PDFInfo
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- CN101214721A CN101214721A CNA2008100562431A CN200810056243A CN101214721A CN 101214721 A CN101214721 A CN 101214721A CN A2008100562431 A CNA2008100562431 A CN A2008100562431A CN 200810056243 A CN200810056243 A CN 200810056243A CN 101214721 A CN101214721 A CN 101214721A
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Abstract
The invention provides an injection device for a mixing injection molding machine, and achieves the integration of mixing modification, enhancement, filling, plastification, injection and molding. The device comprises a mixing plastifying screw, a machine barrel, a screw driving system, a bracing frame and a bearing arranged on the bracing frame. Material which has been mixed and plastified by the screw flows into a storing cylinder through a non-return valve. An injection seat falls back under the rated back pressure. The relative displacement of the storing cylinder and a plunger forms a storing chamber. A heating ring encloses the outer layer of the device. A nozzle head is arranged in front of the plunger. A nozzle oil cylinder is arranged between a solid plate and the plunger. An injection oil cylinder is arranged between the solid plate and a plastifying mechanism, and drives the injection seat to go ahead for injection and to fall back for plastification under certain back pressure. The complete device is characterized in that during injection, the non-return valve is closed and the complete injection seat moves forward relative to the plunger to complete injection. The invention effectively balances the temperature field of the molten material in the storing cylinder, meets the requirement for mixing materials and economizes manpower and material resources. Accordingly, the invention is more environmentally protective and saves more energy.
Description
Technical field
The present invention relates to a kind of mixing modification, enhancing, filling that can realize plastics, realize injection molding device simultaneously, belong to mixing and plastic products injection moulding field.
Background technology
Existing reciprocating type injector, the spiro rod plasticizing process is the process of moving metering behind the screw rod axial rotary, move behind the screw rod, the real work length (effective length) of screw thread is being shortened gradually, thereby in plasticizing process, there are differences on the previous and final thermal history that plastics stood that adds, therefore the plasticizing of plastics in injection screw, reflect two special problems, the spiro rod plasticizing ability descends gradually along with the shortening of screw rod effective length, is a non-stable numerical value; Melt temperature after plasticizing skewness on screw axial length is bigger.This uneven degree will increase along with the increase of injection stroke and screw speed.The material that screw rod is filled in the injection process is a very uncertain factor basically.Screw rod fades away to the pressure that convey materials produced when stop motion, and the gas in the Solid Bed that therefore has been compacted might be overflowed.During injection, the screw axial reach, material flows into screw channel, but can not be full of screw channel, usually, be not enough to inject time satisfy and fill up fully the required time of screw channel, because the material filling is sparse, air is inhaled into, if air can not be discharged from, can reduce plasticizing quality.Because the reciprocating motion of screw rod, the material position of three sections of feeding section, compression section and homogenizing zones in screw channel is fixing.Therefore exhaust is concerning injection molding technique, and the realization aspect Machine Design is more complicated.
During injection, the whole relative machine barrel of screw rod injected forward, and screw rod will overcome the frictional force between screw rod and the machine barrel, the friction drag between screw rod and the material, and the drag that rubs between material and the machine barrel, these have consumed a lot of energy, cause a lot of pressure losses.And the contact area of screw rod and machine barrel increases along with the increase of injection stroke, so the frictional force of whole system increases along with the increase of injection stroke.These have all caused powerful energy loss waste.
On the other hand, along with development of modern scientific technology, the plastic material performance is proposed higher requirement, pure resin can not meet the demands.Traditional plastic blend modification all is elder generation's process double screw extruder mixing granulator, carries out injection molded article then, this invisible waste that has just caused a lot of human and material resources, communications and transportation, and main is the waste of the energy.
Two rank screw rod plunger type injector stabilize to purpose with pressure, specific volume, the temperature characterisitic of molten resin, and structurally will plastify the part and injection piston partly separate.Because adopt no axially movable screw rod to plastify, plasticizing capacity increases substantially, and melt the thermal history of process basic identical, so the axial temperature difference of melt is little, stable performance.Use plunger to inject, can realize very high injection pressure, speed and pressure are more stable during injection.But this structure also comes with some shortcomings: the material phenomenon that stagnates in the barrel is more serious; The barrel cleaning is convenient inadequately; Plasticizing and injection portion are separated, and cause on the bulky structure compact inadequately; After die cavity is injected, need be to the die cavity pressurize, the time of pressurize will be waited in the die cavity goods to cool off substantially, shrink, finalize the design just to begin plastifying material again, clamp-on material storage tube, so molding cycle prolongs obviously.
In order to change the deficiency of said apparatus, injection device of milling injection molding machine of the present invention, plastify the blending and modifying material with screw rod, the material that plasticizing is good is clamp-oned in the material storage tube of injecting mechanism through check valve, when material storage tube has stored up foot behind the fused materials of injection shot, closed check valve promotes the relative plunger advancement with material storage tube of whole mixing plastifying organization by injection cylinder, and the propelling movement material enters by aperture on the plunger and nozzle finishes injection molded article in the mold cavity.The pressurize feeding, after the gate solidification, one-way valve opens, screw rod begins rotation plasticizing blend material, and with certain back pressure whole mixing plastifying organization and material storage tube is retreated under the effect of injection cylinder, is metered into next cycle period again.
Summary of the invention
The objective of the invention is for a kind of incorporate device of plasticizing, blending and modifying, enhancing, filling and injection moulding that can realize plastics is provided; The flow field of material in machine barrel made whole material temperature field more even when this device changed injection; Only need change material storage tube and diameter of plunger just can satisfy the demand of multiple injection volume; Injection pressure height and injection pressure and velocity-stabilization, quality of item height, efficient energy-saving, cost are low.
Injection device of milling injection molding machine of the present invention comprises mixing plastifying organization, injection mechanism, check valve and slide mechanism etc., mixing plastifying organization mainly comprises feeding device, machine barrel, be positioned at the mixing plasticizing element of machine barrel, machine barrel heats cooling system and mixing plasticizing element drives system etc. outward, injection mechanism mainly comprises nozzle, plunger, drive the nozzle oil cylinder that nozzle moves, material storage tube, heating element heater etc., the nozzle oil cylinder is arranged in the plunger bilateral symmetry, there is thermal insulation layer nozzle oil cylinder and plunger contact site, the relative solid plate with nozzle of nozzle hydraulic oil cylinder driving plunger moves horizontally, slide mechanism comprises that mainly driving whole mixing plastifying organization advances and realize the injection cylinder of injection, bracing frame and the bearing that is contained on the bracing frame, guide rail, guide rail is fixed on the injection base seat, injection cylinder is in whole injection mechanism bilateral symmetry layout and the control corresponding system is arranged, injection cylinder drives mixing plastifying organization and slides on guide rail, and provide injection, pressurize, pressure and speed when plasticizing retreats, the machine barrel front end of mixing plastifying organization is connected with the check valve that can flow backwards by the material that mixing plasticizing finishes, mixing plastifying organization is connected point-blank by check valve with injection mechanism, the injection mechanism material storage tube is connected with the other end of check valve, plunger stretches into material storage tube and material storage tube closely cooperates and can relatively move, have the hole in the middle of the plunger, the plunger front end is equipped with nozzle, during injection, the nozzle oil cylinder that is contained between solid plate and the plunger holds out against plunger and nozzle on mould, prevent flash, closed check valve, material storage tube together with check valve and whole mixing plastifying organization under the driving of injection cylinder, plunger moves forward relatively, and hole and the nozzle of material on plunger is injected into mold cavity.When being expelled to the pressurize transfer point, injection cylinder switches to dwell pressure goods is carried out the pressurize feeding.After pressurize was finished, check valve was opened, and mixing plasticizing element begins to rotate mixing plastifying material, enters material storage tube by check valve, and material storage tube and plastifying organization retreat under specified back pressure simultaneously.Enough crowded behind the fused materials of injection shot when material storage tube, closed check valve enters next cycle period.
In the above-mentioned injection device of milling injection molding machine, the nozzle oil cylinder also can be motor, ball screw framework device or electric liquid pull bar or linear motor.
The fitted seal of plunger and material storage tube also can adopt forms such as adding sealing ring to seal in the above-mentioned milling injection molding device.
The injection cylinder that is contained on solid plate and the plastifying organization is arranged in the above-mentioned injection device of milling injection molding machine.Injection cylinder also can be motor, ball screw framework device or electric liquid pull bar or linear motor.
Mixing plastifying organization can be single screw extrusion machine structure or double screw extruder structure or mill extruder structure etc. in the above-mentioned injection device of milling injection molding machine.
Check valve is ball check valve or automatically controlled rotation check valve in the above-mentioned injection device of milling injection molding machine.
When the present invention injected, hole and the nozzle of fused materials from plunger was injected into die cavity, was the eddy flow state during injection of the material of storage cavity, effectively balance the temperature field of the fused materials in the material storage tube.Mixing plasticizing element plastifying material; realized modification, the enhancing of high molecule plastic, the function of filling, the material that mixing modification has been plastified directly carries out injection moulding and obtains goods, has saved traditional double screw rod granulation link; thereby use manpower and material resources sparingly, more environmental protection and energy saving.Adopt no axially movable mixing plasticizing element to plastify, plasticizing capacity increases substantially, melt the thermal history of process basic identical, the axial temperature difference of melt is little, the pressure of the molten resin after the mixing plasticizing, specific volume, temperature characterisitic are stable.Use whole mixing plastifying organization and check valve, material storage tube reach to inject, can realize very high injection pressure, speed and pressure are more stable during injection.Can adopt controllable check valve, realize fast opening and closing, prevent the refluence of material, metering is accurate, and the quality of item height can be realized precise injection molding.The present invention can more easily change material storage tube and diameter of plunger, thereby realizes the injection of multiple injection volume, and efficient energy-saving, cost significantly reduce.
Description of drawings
Fig. 1 is an injection device of milling injection molding machine structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the A-A cutaway view among Fig. 1.
Among the figure: 1 solid plate, 2 injection mechanisms, 3 check valves, 4 machine barrels, 5 mixing plastifying organizations, 6 bracing frames, 7 bearings, 8 guide rails, 9 injection cylinders, 10 injector bases, 11 nozzles, 12 nozzle oil cylinders, 13 heating element heaters, 14 plungers, 15 material storage tubes, 16 thermal insulation layers.
The specific embodiment
Fig. 1, Fig. 2, Fig. 3 have provided the invention process illustration.Fig. 1, Fig. 2, among Fig. 3, injection device of milling injection molding machine of the present invention comprises mixing plastifying organization 5, injection mechanism 2, check valve 3 and slide mechanism etc., mixing plastifying organization 5 mainly comprises feeding device, machine barrel 4, be positioned at the mixing plasticizing element of machine barrel 4, machine barrel 4 outer heating cooling systems and mixing plasticizing element drives system etc., injection mechanism 2 mainly comprises nozzle 11, plunger 14, drive the nozzle oil cylinder 12 of nozzle, material storage tube 15, heating element heater 13 etc., nozzle oil cylinder 12 is arranged in plunger 14 bilateral symmetry, there is thermal insulation layer 16 nozzle oil cylinder 12 and plunger 14 contacts site, nozzle oil cylinder 12 actuation plunger 14 move horizontally with nozzle 11 relative solid plates 1, slide mechanism comprises that mainly driving whole mixing plastifying organization 5 advances and realize the injection cylinder 9 of injection, bracing frame 6 and the bearing 7 that is contained on the bracing frame, guide rail 8, guide rail 8 is fixed on the injector base 10, injection cylinder 9 is in whole injection mechanism bilateral symmetry layout and the control corresponding system is arranged, injection cylinder 9 drives mixing plastifying organization 5 and slides on guide rail 8, and provide injection, pressurize, pressure and speed when plasticizing retreats, machine barrel 4 front ends of mixing plastifying organization 5 are connected with the check valve 3 that can flow backwards by the material that mixing plasticizing finishes, mixing plastifying organization 5 is connected point-blank by check valve 3 with injection mechanism 2, the material storage tube 15 of injection mechanism 2 is connected with the other end of check valve 3, plunger 14 stretches into material storage tube 15 and closely cooperates and can relatively move with material storage tube 15, have the hole in the middle of the plunger 14, the plunger front end is equipped with nozzle 11, during injection, the nozzle oil cylinder 12 that is contained between solid plate 1 and the plunger 14 holds out against plunger 14 and nozzle 11 on mould, prevent flash, check valve 3 is closed, material storage tube 15 together with check valve 3 and whole mixing plastifying organization 5 under the driving of injection cylinder 9, plunger 14 moves forward relatively, and hole and the nozzle 11 of material on plunger 14 is injected into mold cavity.When being expelled to the pressurize transfer point, injection cylinder 9 switches to dwell pressure goods is carried out the pressurize feeding.After pressurize was finished, check valve 3 was opened, and mixing plasticizing element begins to rotate mixing plastifying material, and material enters material storage tube 15 by check valve 3, and material storage tube 15 and mixing plastifying organization 5 retreat under specified back pressure simultaneously.Enough crowded behind the fused materials of injection shot when material storage tube 15, check valve 6 is closed, and enters next cycle period.Major parameter is as follows:
Mixing plastifying organization is a double screw extruder, and screw diameter is 22mm, and draw ratio is 30, driving power 22KW, screw speed 20-400rpm.
In the injection mechanism, material storage tube internal diameter 35mm, length is 80mm, the nozzle oil cylinder adopts stroke at the operating pressure of the 10-100mm standard oil cylinder at 20Mpa.
The clamping major parameter supporting with above-mentioned injection device is: maximum clamp force is 50 tons.
Adopt this device to carry out the blend of polyurethane and ethylene propylene diene rubber, polyethylene, ultra-violet absorber, and injection moulding dumbbell shape batten, mix after tested, its mechanical property with earlier with the twin-screw granulation same goods of injection moulding identical again.
Claims (6)
1. injection device of milling injection molding machine, comprise mixing plastifying organization, injection mechanism, check valve and slide mechanism etc., mixing plastifying organization mainly comprises feeding device, machine barrel, be positioned at the mixing elements of machine barrel, machine barrel heats cooling system and mixing elements drive system etc. outward, injection mechanism mainly comprises nozzle, plunger, drive the nozzle oil cylinder of nozzle, material storage tube, heating element heater etc., the nozzle oil cylinder is arranged in the plunger bilateral symmetry, there is thermal insulation layer nozzle oil cylinder and plunger contact site, the relative solid plate with nozzle of nozzle hydraulic oil cylinder driving plunger moves horizontally, slide mechanism comprises that mainly driving whole mixing plastifying organization advances and realize the injection cylinder of injection, bracing frame and the bearing that is contained on the bracing frame, guide rail, guide rail is fixed on the injection base seat, injection cylinder is in whole injection mechanism bilateral symmetry layout and the control corresponding system is arranged, injection cylinder drives mixing plastifying organization and slides on guide rail, the machine barrel front end of mixing plastifying organization is connected with the check valve that can flow backwards by the material that mixing plasticizing finishes, mixing plastifying organization is connected point-blank by check valve with injection mechanism, the injection mechanism material storage tube is connected with the other end of check valve, plunger stretches into material storage tube and material storage tube closely cooperates and can relatively move, have the hole in the middle of the plunger, the plunger front end is equipped with nozzle, during injection, the nozzle oil cylinder that is contained between solid plate and the plunger holds out against plunger and nozzle on mould, prevent flash, closed check valve, material storage tube together with check valve and whole mixing plastifying organization under the driving of injection cylinder, plunger moves forward relatively, hole and the nozzle of material on plunger is injected into mold cavity, when being expelled to the pressurize transfer point, injection cylinder switches to dwell pressure goods is carried out the pressurize feeding, after pressurize is finished, check valve is opened, mixing plasticizing element begins to rotate mixing plastifying material, material enters material storage tube by check valve, material storage tube and plastifying organization retreat under specified back pressure simultaneously, when material storage tube has squeezed foot behind the fused materials of injection shot, closed check valve enters next cycle period.
2. according to the injection device of milling injection molding machine described in the claim 1, it is characterized in that the nozzle oil cylinder also can be motor, ball screw framework or electric liquid pull bar or linear motor.
3. according to the injection device of milling injection molding machine described in the claim 1, it is characterized in that injection cylinder also can be motor, ball screw framework or electric liquid pull bar or linear motor.
4. according to the injection device of milling injection molding machine described in the claim 1, it is characterized in that mixing plastifying organization can be single screw extrusion machine structure or double screw extruder structure or mill extruder structure etc.
5. according to the injection device of milling injection molding machine described in the claim 1, it is characterized in that the fitted seal of plunger and material storage tube also can adopt forms such as adding sealing ring to seal.
6. according to the injection device of milling injection molding machine described in the claim 1, it is characterized in that check valve is ball check valve or automatically controlled rotation check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100562431A CN101214721A (en) | 2008-01-16 | 2008-01-16 | Injection device of milling injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100562431A CN101214721A (en) | 2008-01-16 | 2008-01-16 | Injection device of milling injection molding machine |
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| CN101214721A true CN101214721A (en) | 2008-07-09 |
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| CNA2008100562431A Pending CN101214721A (en) | 2008-01-16 | 2008-01-16 | Injection device of milling injection molding machine |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350773A (en) * | 2011-11-10 | 2012-02-15 | 黄东雄 | Conveniently used injection machine |
| CN102470580B (en) * | 2009-12-07 | 2014-07-09 | 三菱重工塑胶科技有限公司 | Injection molding machine for two-material molding |
| CN105196469A (en) * | 2015-11-10 | 2015-12-30 | 苏州盛康塑胶电器有限公司 | Pet comb machining process |
| CN106113399A (en) * | 2015-05-08 | 2016-11-16 | 三菱电机株式会社 | Injection nozzle, injection device, Coinjection molding apparatus, injecting method and injection moulding method |
| CN107081882A (en) * | 2017-06-20 | 2017-08-22 | 富强鑫（宁波）机器制造有限公司 | A kind of injection cylinder component structure of Jet forming machine |
| CN108099147A (en) * | 2018-01-03 | 2018-06-01 | 浙江来福智能科技有限公司 | A kind of injection molding apparatus of the online compression molding forming machine of long carbon fiber composite material |
| CN110789086A (en) * | 2019-10-24 | 2020-02-14 | 杨智凯 | Full-automatic pressurize machine |
| CN110789080A (en) * | 2019-11-12 | 2020-02-14 | 山东东宏管业股份有限公司 | Production device, production method and application of connecting pipe fitting of plastic composite pipe |
| CN113290775A (en) * | 2021-06-08 | 2021-08-24 | 北京化工大学 | Plasticizing injection molding device of exhaust type injection molding machine |
| CN113579198A (en) * | 2021-07-15 | 2021-11-02 | 伯乐智能装备有限公司 | Production equipment for magnesium alloy modified product |
-
2008
- 2008-01-16 CN CNA2008100562431A patent/CN101214721A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102470580B (en) * | 2009-12-07 | 2014-07-09 | 三菱重工塑胶科技有限公司 | Injection molding machine for two-material molding |
| CN102350773A (en) * | 2011-11-10 | 2012-02-15 | 黄东雄 | Conveniently used injection machine |
| CN106113399B (en) * | 2015-05-08 | 2018-09-28 | 三菱电机株式会社 | Injection nozzle, injection device, Coinjection molding apparatus, injecting method and injection moulding method |
| CN106113399A (en) * | 2015-05-08 | 2016-11-16 | 三菱电机株式会社 | Injection nozzle, injection device, Coinjection molding apparatus, injecting method and injection moulding method |
| CN105196469A (en) * | 2015-11-10 | 2015-12-30 | 苏州盛康塑胶电器有限公司 | Pet comb machining process |
| CN107081882A (en) * | 2017-06-20 | 2017-08-22 | 富强鑫（宁波）机器制造有限公司 | A kind of injection cylinder component structure of Jet forming machine |
| CN108099147A (en) * | 2018-01-03 | 2018-06-01 | 浙江来福智能科技有限公司 | A kind of injection molding apparatus of the online compression molding forming machine of long carbon fiber composite material |
| CN108099147B (en) * | 2018-01-03 | 2023-10-31 | 浙江来福智能科技有限公司 | Injection molding system of long carbon fiber composite material on-line compression molding machine |
| CN110789086A (en) * | 2019-10-24 | 2020-02-14 | 杨智凯 | Full-automatic pressurize machine |
| CN110789080A (en) * | 2019-11-12 | 2020-02-14 | 山东东宏管业股份有限公司 | Production device, production method and application of connecting pipe fitting of plastic composite pipe |
| CN110789080B (en) * | 2019-11-12 | 2022-06-03 | 山东东宏管业股份有限公司 | Production device, production method and application of connecting pipe fitting of plastic composite pipe |
| CN113290775A (en) * | 2021-06-08 | 2021-08-24 | 北京化工大学 | Plasticizing injection molding device of exhaust type injection molding machine |
| CN113290775B (en) * | 2021-06-08 | 2024-05-28 | 北京化工大学 | Plasticizing injection molding device of exhaust type injection molding machine |
| CN113579198A (en) * | 2021-07-15 | 2021-11-02 | 伯乐智能装备有限公司 | Production equipment for magnesium alloy modified product |
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Open date: 20080709 |