CN102039648B - Superspeed injection forming machine - Google Patents
Superspeed injection forming machine Download PDFInfo
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- CN102039648B CN102039648B CN 200910093523 CN200910093523A CN102039648B CN 102039648 B CN102039648 B CN 102039648B CN 200910093523 CN200910093523 CN 200910093523 CN 200910093523 A CN200910093523 A CN 200910093523A CN 102039648 B CN102039648 B CN 102039648B
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Abstract
The invention provides an injection forming machine suitable for superspeed injection forming. The superspeed injection forming machine comprises a mold closing device, an injection device and a rack, and the mold closing device and the injection device are arranged on the rack; the injection device comprises a spray nozzle, a machine barrel, a heating ring, a screw rod, a charging hopper, a hopper seat, a hopper seat moving device, an injection oil cylinder, a coupling, a hydraulic motor and an injection table; the spray nozzle, the machine barrel, the hopper seat, the injection oil cylinder, the injection oil cylinder and the hydraulic motor are sequentially connected in an axis alignment way; the injection oil cylinder comprises a cylinder barrel, an injection piston, an injection piston rod, a pressure sensor, a thrust bearing and a speeder spring, the thrust bearing is arranged on an end face of the injection piston, which is not provided with any piston rod, the speeder spring is located in an oil cavity of the injection oil cylinder close to the hydraulic motor, one end of the speeder spring is fixed to the end face of the injection oil cylinder, and the end of the speeder spring, close to the piston, is a free end or is connected with the thrust bearing. The invention provides the superspeed injection forming machine with the advantages of simple structure, convenience of operation, stable operating and high cost performance.
Description
Technical field
The present invention relates to a kind of injection (mo(u)lding) machine, belong to macromolecular material forming machine field.
Background technology
Injection moulding is to produce the fabulous processing method of macromolecule material product low-costly and in high volume, simultaneously, also is the indispensable process technology of exploitation high-tech product.Enter 21st century, the fast development of IT industry has proposed an urgent demand of " ultralight, ultra-thin, ultraprecise " to the processing of high molecular material moulded products.In order to adapt to this application need, be that the measure that the macromolecular material processing and forming industrial powers of representative is taked is to develop ultrahigh speed injection moulding with Japan and Germany at present.Ultrahigh speed injection molded article wall thickness can reach the following and serviceability of 0.3mm and improve, thereby at special dimensions such as IT product such as mobile phone, notebook computer and IC-card and Aero-Space very wide application prospect is arranged.
The injection molding outstanding advantage of ultrahigh speed has: 1) since moulding material in high shear rate current downflow, material is subjected to high shear heating and viscosity is reduced.In addition, material contacts with the low temperature wall of runner in the mould can form a cortex usually when solidifying, under the injection molding situation of ultrahigh speed mold filling, the thickness of this cortex is also thinner, make macromolecular material in mold filling process, can remain on high temperature condition preferably, thereby help realizing the ultra-thin-wall moulding; 2) high polymer is than flowing under the low viscosity, and also relatively evenly, thermograde is less for moulded products pressure that each several part bears, thereby makes the warpage, distortion etc. of goods be out of shape less; 3) flow liner of product surface (current mark) is compared with the normal injection moulding greatly with melt run and is taken on a new look.
Thin-walled injection moulding has become the performance that injection machine needs most increase.The thickness (relevant) under 1mm～2mm of general thin-wall product with the ratio of wall thickness/length of flow, and often required precision is very high, general injection machine may not reach this precision, thus need a kind of more special and have at a high speed, the injection machine of high-voltage performance.The ultrahigh speed injection (mo(u)lding) machine that emerges now all is a mode of taking to increase considerably injection screw (or piston) fltting speed.Injection screw (or plunger) pace reaches more than 500～1000mm/s, is tens times of normal injection speed.
Make a general survey of prior art, mainly contain the raising that following three kinds of modes realize the screw rod fltting speed.
First kind is on the basis of hydraulic type injection machine, realizes the ultrahigh speed injection by the accumulator that increases big volume.Such high speed machine is equipped with two jumbo accumulators usually, and at idle phase accumulation energy in accumulator of working cycles, energy discharges when injection, reaches the purpose that improves injection speed and injection pressure.Such ultrahigh speed injection machine has not only significantly increased cost, and operating noise is big.The ultrahigh speed injection (mo(u)lding) machine UH series that Nissei Plastic Industrial Co., Ltd produces just belongs to this type, and injection speed is 1000～2000mm/s.
Second kind is to drive action of injection by linear motor to realize the ultrahigh speed injection.Japan Fanuc releases and to drive with four linear motors, makes injection speed can reach 2000mm/s and acceleration and reaches 13g and reply and only need the ultrahigh speed of 0.017s full electric type injector.Though its first generation product SUPERSHOT 100i ultrahigh speed injection (mo(u)lding) machine obtained the ten big industrial new product prizes of daily magazine news in 2000, because the high and rare application of cost.
The third is to realize by the expand technology controlling and process mode of injection (X-MELT) of melt.The injection process that expands adopts through the precompressed melt self-expanding of high pressure and realizes high speed injection, is compressed 10% about the 20MPa body greatly.This equipment does not need the screw rod reach process of common injection machine when mold filling.The X-MELT mold filling process is: after needle-valve was opened, the pressurized melt sharply expanded, thereby is full of die cavity rapidly.Whole mold filling process has only part second.Because this injection molding technology has high front end speed, so be specially adapted to the thin-walled that general high speed injection machine is difficult to realize, the accurate product moulding of long stream.It is pointed out that the X-MELT Technology Need debugs to determine best screw rod precommpression position according to P-V-T relationship at specific material, operation easier is big.And the nozzle of melt expansion injector will be equipped with high voltage bearing needle-valve, and technical difficulty is big, the cost height.
Summary of the invention
The objective of the invention is to overcome the shortcoming of existing ultrahigh speed Coinjection molding apparatus and technology, a kind of simple in structure, easy to operate, working stability, ultrahigh speed injection (mo(u)lding) machine that cost performance is high are provided.
For achieving the above object, the present invention by the following technical solutions: a kind of ultrahigh speed injection machine, mainly form by injection device, mold closing mechanism and frame, mold closing mechanism and injection device are positioned on the frame, mold closing mechanism is identical with conventional injection machine with frame; Injection device is by nozzle, machine barrel, heating collar, screw rod, loading hopper, hopper seat, hopper seat mobile device, injection cylinder, shaft coupling, hydraulic motor and penetrate platform and form; Nozzle, machine barrel, hopper seat, injection cylinder are connected with hydraulic motor axial alignment successively, penetrating platform is fixed on the frame, the hopper seat is arranged on to be penetrated on the platform, and phase correlation platform moves under the control of hopper seat mobile device, loading hopper is arranged on the hopper seat, screw rod is positioned at machine barrel, and heating collar is wrapped in outside the machine barrel; Injection cylinder is made up of cylinder barrel, injection ram, injecting piston rod, pressure sensor, thrust bearing and speedup spring, thrust bearing is arranged on the end face of injection ram piston-rodless, the screw rod tail end is fixedlyed connected with injecting piston rod, hydraulic motor output shaft is connected with shaft coupling, shaft coupling drives injection ram and rotates, and shaft coupling can move axially with respect to injection ram; The speedup spring is positioned at the injection cylinder oil pocket near hydraulic motor one side, and one end and injection cylinder end face are fixed, and an end of close injection ram is connected with thrust bearing, and effective active length of speedup spring is the injection stroke of injection machine; Pressure sensor is positioned at the oil pocket that injection cylinder is placed the speedup spring.
Injection cylinder of the present invention also can be made up of cylinder barrel, injection ram, injecting piston rod, pressure sensor, thrust bearing, speedup spring and regulating piston, thrust bearing is arranged on the end face of injection ram piston-rodless, the screw rod tail end is fixedlyed connected with injecting piston rod, motor output shaft is connected with shaft coupling, shaft coupling passes regulating piston and drives the injection ram rotation, and injection ram can move axially with respect to shaft coupling; The speedup spring is between injection ram and regulating piston, and one end and regulating piston end face are fixed, and fixedlys connected with thrust bearing near an end of injection ram, and effective active length of speedup spring is the injection stroke of injection machine; Pressure sensor is positioned at the oil pocket that injection cylinder is placed the speedup spring.
Speedup spring of the present invention is the compression spring, and the original state of speedup spring is in its pre-compressed state, guarantees that the speedup spring still can operate as normal when injection volume is very little.
The connected mode of shaft coupling of the present invention and injection ram is spline or the flat key with guide effect.
Injection cylinder of the present invention also can be two, be symmetrically distributed in hopper seat both sides, nozzle, machine barrel, hopper seat are connected with hydraulic motor axial alignment successively, motor output shaft is connected with screw rod by shaft coupling, the injecting piston rod of injection cylinder or cylinder barrel link to each other with screw rod or hydraulic motor, and the cylinder barrel of injection cylinder or piston rod are connected with the hopper seat.
By above technical scheme as can be known, the present invention has compared with prior art saved two accumulators that are used for booster and speed-increasing, has simplified the structure of machine, the noise when having eliminated work; Need not the high linear motor of cost, significantly reduced the cost of machine; The goods manufacturing process is the same with conventional goods, need not to carry out special operation, and simple to operate, spray nozzle front end also need not be equipped with high performance needle-valve.
Description of drawings
Fig. 1 is the schematic diagram of a kind of ultrahigh speed injection (mo(u)lding) machine of the present invention.
Fig. 2 is the injection device schematic diagram of a kind of ultrahigh speed injection (mo(u)lding) machine of the present invention.
Fig. 3 is the enlarged drawing of the injection device hydraulic jack part of a kind of ultrahigh speed injection (mo(u)lding) machine of the present invention.
Fig. 4 is the structural representation that hydraulic cylinder shown in Figure 3 increases regulatory function.
Among the figure: 1-mold closing mechanism, 2-injection device, 3-frame, 4-nozzle, 5-machine barrel, the 6-heating collar, 7-screw rod, 8-hopper seat, 9-loading hopper, 10 injecting piston rods, the 11-cylinder barrel, 12-pressure sensor, 13-injection cylinder, 14-hydraulic motor, the 15-motor output shaft, 16-shaft coupling, 17-oil-in, 18-speedup spring, the 19-injection ram, the 20-oil return opening, 21-penetrates platform, 22-hopper seat mobile device, the 23-thrust bearing, 24-regulates oil pocket, and 25-regulates hydraulic fluid port, 26-regulating piston
The specific embodiment
As shown in Figure 1, the present invention is a kind of ultrahigh speed injection (mo(u)lding) machine, mainly is made up of mold closing mechanism 1, injection device 2 and frame 3, and mold closing mechanism 1 and injection device 2 are positioned on the frame 3.
As shown in Figures 2 and 3, injection device 2 is by nozzle 4, machine barrel 5, heating collar 6, screw rod 7, loading hopper 9, hopper seat 8, hopper seat mobile device 22, injection cylinder 13, shaft coupling 16, hydraulic motor 14 with penetrate platform 21 and form; Nozzle 4, machine barrel 5, hopper seat 8, injection cylinder 13 are connected with hydraulic motor 14 axial alignment successively, penetrating platform 21 is fixed on the frame 3, hopper seat 8 is arranged on to be penetrated on the platform 21, hopper seat mobile device 22 1 ends are with frame 3 or penetrate platform 21 and be connected, one end is connected with hopper seat 8, and hopper seat 8 phase correlation platform 21 under the control of hopper seat mobile device 22 moves, and loading hopper 9 is arranged on the hopper seat 8, screw rod 7 is positioned at machine barrel 5, and heating collar 6 is wrapped in outside the machine barrel 5; Injection cylinder 13 is made up of cylinder barrel 11, injection ram 19, injecting piston rod 10, pressure sensor 12, thrust bearing 23 and speedup spring 18, thrust bearing 23 is arranged on the end face of injection ram 19 piston-rodless, screw rod 7 tail ends are fixedlyed connected with injecting piston rod 10, motor output shaft 15 is connected with shaft coupling 16, shaft coupling 16 drives injection ram 19 and rotates, and injection ram 19 can move axially with respect to shaft coupling 16; Speedup spring 18 is positioned at injection cylinder 13 oil pockets near hydraulic motor 14 1 sides, one end and injection cylinder 13 end faces are fixed, end near injection ram 19 is fixedlyed connected with thrust bearing 23, and effective active length of speedup spring 18 is the injection stroke of injection machine; Pressure sensor 12 is positioned at the oil pocket that injection cylinder 13 is placed speedup spring 18.
Speedup spring 18 is the compression spring, and original state is in its pre-compressed state, guarantees that the speedup spring still can operate as normal when injection volume is very little.
Shaft coupling 16 is spline or the flat key with guide effect with the connected mode of injection ram 19.
In the preformed stage of cycle period, screw rod 7 retreats while rotating, and in fallback procedures, provides back pressure by 18 pairs of material preformeds of compression speedup spring; Because the melt back pressure that speedup spring 18 provides in the process of being compressed increases gradually, can be by adjusting the pressure of hydraulic injection molding machine system, with speedup spring 18 common the constant of material preformed back pressure of realizing at oil return opening 20 places.In pre-plastic process, compressed speedup spring 18 stores great number of elastic potential energy.The smooth rotation that thrust bearing 23 is realized between injection ram 19 and the speedup spring 18.After the material preformed was finished, oil return opening 20 will be kept certain pressure, to keep the elastic potential energy of speedup spring 18.During injection, oil-in 17 oil-feeds, oil return opening 20 pressure are cancelled, and at this moment, the elastic potential energy abrupt release of speedup spring 18 provides power and acceleration for injection ram 19 travels forward, and enters the injection moulding of die cavity realization ultrahigh speed at a high speed thereby make screw rod 7 promote melt.
Figure 4 shows that another kind of embodiment of the present invention, hydraulic cylinder increases regulatory function.Injection cylinder 13 is made up of cylinder barrel 11, injection ram 19, injecting piston rod 10, pressure sensor 12, thrust bearing 23, speedup spring 18 and regulating piston 26, thrust bearing 23 is arranged on the end face of injection ram 19 piston-rodless, screw rod 7 tail ends are fixedlyed connected with injecting piston rod 10, motor output shaft 15 is connected with shaft coupling 16, shaft coupling 16 passes regulating piston 26 and drives injection ram 19 rotations, and shaft coupling 16 can move axially with respect to injection ram 19; Speedup spring 18 is between injection ram 19 and regulating piston 26, and one end and regulating piston 26 end faces are fixed, and fixedlys connected with thrust bearing 23 near an end of injection ram 19, and effective active length of speedup spring 18 is the injection stroke of injection machine; Pressure sensor 12 is positioned at the oil pocket that injection cylinder 13 is placed speedup spring 18.In the preformed stage of cycle period, screw rod 7 retreats while rotating, and in fallback procedures, provides back pressure by 18 pairs of material preformeds of compression speedup spring; Because the melt back pressure that speedup spring 18 provides in the process of being compressed increases gradually, can be by adjusting the pressure of hydraulic injection molding machine system, with speedup spring 18 common the constant of material preformed back pressure of realizing at oil return opening 20 places.In pre-plastic process, compressed speedup spring 18 stores great number of elastic potential energy.The smooth rotation that thrust bearing 23 is realized between injection ram 19 and the speedup spring 18.When if preformed is finished, when the elastic potential energy of speedup spring 18 storages does not conform to process requirements (bigger than normal or less than normal), by improving the pressure of regulating hydraulic fluid port 25 places, the pressure of regulating oil pocket 24 is raise, thereby make regulating piston 26 or be moved to the left to the right, so that the elastic potential energy of speedup spring 18 diminishes or becomes greatly to satisfy arts demand.After the material preformed was finished, oil return opening 20 will be kept certain pressure, to keep the elastic potential energy of speedup spring 18.During injection, oil-in 17 oil-feeds, oil return opening 20 pressure are cancelled, and at this moment, the elastic potential energy abrupt release of speedup spring 18 provides power and acceleration for injection ram 19 travels forward, and enters the injection moulding of die cavity realization ultrahigh speed at a high speed thereby make screw rod 7 promote melt.
Claims (2)
1. ultrahigh speed injection (mo(u)lding) machine, mainly by injection device, mold closing mechanism and frame are formed, mold closing mechanism and injection device are positioned on the frame, injection device is by nozzle, machine barrel, heating collar, screw rod, loading hopper, the hopper seat, hopper seat mobile device, injection cylinder, shaft coupling, hydraulic motor and penetrate platform and form, it is characterized in that nozzle, machine barrel, the hopper seat, injection cylinder is connected with hydraulic motor axial alignment successively, penetrating platform is fixed on the frame, the hopper seat is arranged on to be penetrated on the platform, loading hopper is arranged on the hopper seat, screw rod is positioned at machine barrel, and heating collar is wrapped in outside the machine barrel; Injection cylinder is made up of cylinder barrel, injection ram, injecting piston rod, pressure sensor, thrust bearing and speedup spring, thrust bearing is arranged on the end face of injection ram piston-rodless, the screw rod tail end is fixedlyed connected with injecting piston rod, motor output shaft is connected with shaft coupling, shaft coupling drives injection ram and rotates, and shaft coupling can move axially with respect to injection ram; The speedup spring is positioned at the injection cylinder oil pocket near hydraulic motor one side, the speedup spring is connected with thrust bearing near an end of injection ram, the other end of speedup spring and injection cylinder end face are fixed, and effective active length of speedup spring is the injection stroke of injection machine; Pressure sensor is positioned at the oil pocket that injection cylinder is placed the speedup spring.
2. a kind of ultrahigh speed injection (mo(u)lding) machine according to claim 1, it is characterized in that: injection cylinder is made up of cylinder barrel, injection ram, injecting piston rod, pressure sensor, thrust bearing, speedup spring and regulating piston, thrust bearing is arranged on the end face of injection ram piston-rodless, the screw rod tail end is fixedlyed connected with injecting piston rod, motor output shaft is connected with shaft coupling, shaft coupling passes regulating piston and drives the injection ram rotation, and injection ram can move axially with respect to shaft coupling; The speedup spring is between injection ram and regulating piston, the speedup spring is fixedlyed connected with thrust bearing near an end of injection ram, the other end of speedup spring replaces to the regulating piston end face and fixes, and effective active length of speedup spring is the injection stroke of injection machine; Pressure sensor is positioned at the oil pocket that injection cylinder is placed the speedup spring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910093523 CN102039648B (en) | 2009-10-12 | 2009-10-12 | Superspeed injection forming machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910093523 CN102039648B (en) | 2009-10-12 | 2009-10-12 | Superspeed injection forming machine |
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| CN102039648A CN102039648A (en) | 2011-05-04 |
| CN102039648B true CN102039648B (en) | 2013-07-24 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102582043B (en) * | 2012-02-09 | 2014-04-02 | 北京化工大学 | Fully electric super speed injection molding machine |
| CN102975341B (en) * | 2012-11-29 | 2015-01-28 | 宁波千普机械制造有限公司 | Injection device for composite type shoes-making machine |
| CN103587026A (en) * | 2013-11-06 | 2014-02-19 | 宁夏新航能源环境科技有限公司 | Energy-saving plastic injection gun |
| CN104859087A (en) * | 2015-04-20 | 2015-08-26 | 北京化工大学 | Electro-hydraulic compound super-speed energy-saving injection molding machine |
| CN107552755A (en) * | 2017-09-30 | 2018-01-09 | 昆山盛事达机械有限公司 | Semi-solid magnesium alloy pressure charging system |
| CN108582651B (en) * | 2018-05-23 | 2020-10-20 | 宁波三顺机械设备科技有限公司 | High-speed optical lens injection molding machine |
| JP7434017B2 (en) * | 2020-03-26 | 2024-02-20 | 株式会社日本製鋼所 | injection device |
| CN114923616A (en) * | 2022-06-06 | 2022-08-19 | 无锡新佳盛压铸机制造有限公司 | Mold clamping force detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106043A (en) * | 1985-07-12 | 1987-01-07 | 上海塑料制品五厂 | Single motor-driven premolding injection machine |
| CN201506011U (en) * | 2009-10-12 | 2010-06-16 | 北京化工大学 | Ultrahigh speed injection molding machine |
-
2009
- 2009-10-12 CN CN 200910093523 patent/CN102039648B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106043A (en) * | 1985-07-12 | 1987-01-07 | 上海塑料制品五厂 | Single motor-driven premolding injection machine |
| CN201506011U (en) * | 2009-10-12 | 2010-06-16 | 北京化工大学 | Ultrahigh speed injection molding machine |
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| CN102039648A (en) | 2011-05-04 |
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