CN202079740U - Conical screw injection machine - Google Patents
Conical screw injection machine Download PDFInfo
- Publication number
- CN202079740U CN202079740U CN2011200974744U CN201120097474U CN202079740U CN 202079740 U CN202079740 U CN 202079740U CN 2011200974744 U CN2011200974744 U CN 2011200974744U CN 201120097474 U CN201120097474 U CN 201120097474U CN 202079740 U CN202079740 U CN 202079740U
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- screw
- injection
- plasticizing
- volume
- storage cylinder
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a conical screw injection machine which mainly comprises a plasticizing component, an injection component, a mold closing component and a base, and also mainly comprises a feeding device, a screw, a cylinder, a motor, a transmission device, a feed storage and injection system, a heating device, a mold and a mold closing system, and the like. The plasticizing screw is a conical screw and can be single, double or triple. A plasticizing-injection separation structure is adopted: materials enter a storage cylinder after being plasticized by the screw, a piston in the storage cylinder advances relative to the storage cylinder so that the volume is reduced for injection, and melt in the storage cylinder is pressed to eject out from a nozzle and enters a mold cavity for forming. After the injection is completed, the piston in the storage cylinder retreats relative to the storage cylinder so that the volume is increased for storage. Plasticizing and mixed melting are completed before a metering section, the volume change in the storage cylinder can realize the storage and the injection, and a screw rotation mechanism can not move front and back relative to the cylinder. In the conical screw injection machine, the injection capacity does not depend on the ratio of the diameter of the screw and a plasticizing stroke, and is relative to the volume of the storage cylinder.
Description
Technical field
The utility model conical screw injector can be used for the injection technique process in the processing such as plastics, rubber, coating, paper pulp, medicine, feed, food, explosive.This machine both can be used for experiment and also can directly produce.
Background technology
Reciprocating screw formula injector, operation principle are material heating plasticizings in machine barrel, rely on the rotation of machine barrel inner screw material further to be plastified and is delivered to the screw rod end.When reaching a certain amount of, the material that will be stored in front end by the quick reach of screw rod is injected in the mould.Because characteristics such as simple in structure have obtained extensive use.
In fact, conventional reciprocating screw-type injection machine bin stock section is exactly the continuity of metering section, and just screw rod does not extend to this section, and injection must move forward just and can finish after screw rod rotation plasticizing.During injection, must move forward by relative barrel with screw rod rotation associated mechanisms.Cause following limitation like this: (1) for guaranteeing injection pressure, the injection motive force must be very big; (2) each bin stock amount must be little, causes injection volume also little; (3) forming high-pressure injection and high shear in the small powder tube easily causes material to decompose; (4) plastify with injection and must carry out successively, restriction mutually causes suitable injection volume of injector and material and mould scope little.(5) adopt traditional straight spiro rod plasticizing bad to material effects such as polyvinyl chloride.Therefore, be necessary to address these problems.
The utility model separates the metering section of bin stock section with the front, and the variation of bin stock section internal volume is in order to realize injection fully, and part does not then need to take into account this function and only finishes plasticizing and mixing before the metering section.Secondly, the interior piston that links to each other with nozzle of bin stock section moves and changes bin stock section volume, does not need relative barrel mobile screw rotation associated mechanisms.Like this, realized that plasticizing separates with function of injection, can carry out continuous plastication, obviously improved productive rate; This novel injector injection capacity does not resemble the restriction that is subjected to screw diameter and the ratio of plasticizing stroke the common injection machine, and is only relevant with the material storage jar volume.Can obtain jumbo injection capacity with spiro rod plasticizing than minor diameter, but also injection moulding ultra-large type and miniature goods.Owing to do not injected movement requirement and limit, also can select big screw rod and improve injection volume easily.
Be different from and use common cylindricality screw rod in traditional injector, the utility model adopts conical screw efficiently to plastify system on the basis of plasticizing-injection isolating construction, obviously improves the plasticizing quality of material.Conical screw is extruded difficult processing materials such as temperature-sensitive materials such as being successfully applied to polyvinyl chloride, high filled composite materials.And the conical screw tail diameter increases, and has improved the bearing capacity of screw rod; Feeding section screw channel volume is big, and feeding quantity is big, easily adds the bulk density powder of larger volume; Also help the heat conduction, easier realization is to material heating or cooling; The discharge zone screw diameter is little, and peripheral speed is less, and the shearing of generation is lower, and frictional heat is also less, fire damage dangerous little; The screw channel volume reduces gradually along extruding direction, and material obtains compression gradually, thereby makes screw channel be full of material sooner, guarantees material plasticizing gently continuously.As seen, adopt conical screw plasticizing system and plasticizing-injection separating technology association schemes can solve the many problems of traditional injector, expanded its range of application, have energy-efficient characteristics.
In the spiro rod plasticizing system, can adopt single screw rod, twin-screw, three screw rods even multiscrew system.For example, in the double screw extruder, it is opposed that the protruding row thread of two screw rods is interlaced row, and in opposed formation " C type " chamber, material is subjected to shearing, friction and heating, rub and strengthen the mixing plasticizing effect; Material forward conveying capacity is big, the output height; Two screw rods are meshing with each other, and are self-cleaning effective, reduced the decomposition carbonization phenomenon of material, thereby obtain general application in extruder.In like manner, multiscrew can further improve output.Like this, twin-screw, three screw rods even multi-screw rod plasticizing system be can be applicable to plasticizing efficiency and the quality that plasticizing of the present utility model-injection separating technology will improve material greatly, unique advantage is arranged for forming large-scale injection molding products.
The utility model content
The utility model conical screw injector mainly is made up of feeding device, screw rod, machine barrel, motor, transmission device, bin stock and injecting systems, heater, mould and clamping etc.Injector adopts plasticizing-injection separate type in the utility model, and screw rod is a conical screw, and the number of screw rod can be single screw rod, twin-screw or three screw rods.
Plasticizing-injection separate type is separated the metering section of bin stock section with the front in the utility model.The plasticized screw head is installed a backstop, guarantees that material flows to the bin stock section and seldom even can not flow backwards from plasticizing charging barrel.Change bin stock section internal volume by the continuous piston of control and nozzle relative to moving of holding bin, do not require that the relative barrel of rotary screw moves forward and backward.The variation of bin stock section internal volume only realizes injection, and part is then only finished plasticizing and mixing before the metering section.
When this novel injector was worked, material entered material storage jar behind spiro rod plasticizing, and the relative bin stock cylinder body of material storage jar inner carrier advances and dwindles volume and inject, and the melt injection delivery nozzle in the material storage jar is entered die cavity.Injection finishes, and the relative bin stock cylinder body of material storage jar inner carrier retreats and increases volume and carry out bin stock.This novel injector injection capacity does not resemble the restriction that is subjected to screw diameter and the ratio of plasticizing stroke the common injection machine, and is only relevant with the material storage jar volume.Realize that plasticizing separates with function of injection, can carry out continuous plastication, obviously improve productive rate; Can use the injected articles for preparing big capacity even vast capacity than the spiro rod plasticizing of minor diameter.
Be different from that screw rod is an ordinary straight cylindricality screw rod in the conventional injector, screw rod adopts conical screw in the utility model, guarantees material plasticizing gently continuously, can process temperature-sensitive material; Increase the bearing capacity of screw rod; Feeding section screw channel volume is big, easily adds the bulk density powder of larger volume.
The number of screw rod can be single screw rod, twin-screw or three screw rods in the injector.When adopting twin-screw or three screw rods, screw rod arrangement mode and direction of rotation can be carried out multiple combination, need select according to different material and technological requirement, obtain the goods of the best with the energy consumption of minimum.
Effect of the present utility model: the screw rod of injector is a conical screw in the utility model, is particularly suitable for the injection processing of difficult processing materials such as powder and heat sensitive material.Injector adopts plasticizing-injection separate type, obviously improves output, enlarges the injector scope of application.Screw rod can adopt twin-screw or three screw rods, has strengthened the mixed effect of material in plasticizing, has improved output simultaneously.
Description of drawings
The structural representation of Fig. 1 the utility model conical screw injector
Structural representation when Fig. 2 the utility model conical screw injector adopts twin-screw
Screw rod when Fig. 3 adopts in-line the to arrange conical three-screw schematic diagram of arranging
Screw rod when Fig. 4 adopts the rounded projections arranged conical three-screw schematic diagram of arranging
Specific embodiments
Embodiment one:
As Fig. 1, the utility model conical screw injector mainly comprises plasticizing parts, injection member and matched moulds parts and base etc.The plasticizing part comprises: motor 1, transmission device 2, feeding device 3, heater 4, machine barrel 5, backstop 6, screw rod 10, screw head 12.Injection portion comprises material storage jar 13, piston 7, nozzle 8, runner 14, support pull bar 11 and hydraulic cylinder 15 etc.Piston 7 and nozzle 8 are bound up, runner 14 of inner formation.Can installation mold 16 between the template of mold closing mechanism 9, and drive the moving half module of mould.
Operation principle: mould 16 is closed under mold closing mechanism 9 drives.Add material by charge door 3, screw rod 10 rotates plastifying material under motor 1 drives.Under the back pressure effect, material enters material storage jar 13 through backstop 6.Support pull bar 11 drive support integral body (screw rod rotary system (1,2,10), barrel and material storage jar are fixed in this support) retreat the expansion volume and carry out abundant bin stock.Nozzle adjusted to mould gate contact, under hydraulic cylinder 15 effects, support pull bar 11 drives support integral body fast moving forward, and material enters mould 16 through runner 14 and through nozzle 8.Through the pressurize cooling, mould is opened, and ejects goods.So far finished shot process.In injection, screw rod can rotate continuously and plastify, and the plasticizing again of finishing to be injected such as also can suspend.After injection was finished, support pull bar 11 drove support integral body and retreats bin stock again.So repeat, just form whole injection moulding.
Embodiment two:
Plasticizing process can adopt Fig. 2, Fig. 3 and conical double-screw, in-line shown in Figure 4 to arrange multiple screw form such as conical three-screw and rounded projections arranged conical three-screw, improves output and enlarges the equipment scope of application.
Embodiment three:
Similar to specific embodiments one principle, different is: screw rod rotary system (1,2,10) and barrel are placed in the injector base and do not move forward and backward, and pull bar is fixed on injector base or the fixing matched moulds system solid plate.Hydraulic cylinder 15 drives piston 7 and nozzle 8 moves forward and backward.Dwindle the bin stock volume and increase material pressure, increase the bin stock volume and can make more materials flow to material storage jar from plasticizing charging barrel with regard to injectable.
Embodiment four:
Similar to specific embodiments three principles, different is: pull bar is fixed on the matched moulds system moving platen, and hydraulic cylinder 15 drives piston 7 by pull bar and nozzle 8 moves forward and backward.Matched moulds moving platen reach drives piston and dwindles the bin stock volume and injects, during die sinking behind the moving platen the moving piston of shipper pole move and enlarge the bin stock volume and carry out bin stock.
Embodiment five:
Material enters die cavity through nozzle, runner and cast gate in the conventional injection moulding.When moulding such as massive article, can omit nozzle, material in the material storage jar is injected into die cavity by be connected tubular type runner and cast gate with piston inner hole.
Claims (3)
1. conical screw injector, mainly comprise plasticizing parts, injection member and matched moulds parts and base, form by feeding device, screw rod, machine barrel, motor, transmission device, bin stock and injecting systems, heater, mould and matched moulds system etc., it is characterized in that: adopt conical screw plasticizing system and plasticizing-injection separate type.
2. conical screw injector according to claim 1 is characterized in that: plasticizing can be single screw rod, twin-screw or three screw rod various ways with conical screw.
3. conical screw injector according to claim 1, it is characterized in that: material enters material storage jar in the plasticizing-injection separate type behind spiro rod plasticizing, the relative bin stock cylinder body of material storage jar inner carrier advances and dwindles volume and inject, melt injection delivery nozzle in the material storage jar is entered die cavity carry out moulding, injection finishes, and the relative bin stock cylinder body of material storage jar inner carrier retreats and increases volume and carry out bin stock; Only finish plasticizing and mixing before the metering section, the variation of material storage jar internal volume only realizes bin stock and injection, and the relative barrel of rotary screw does not move forward and backward; Injection capacity does not depend on screw diameter and the ratio that plastifies stroke, and is only relevant with the material storage jar volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200974744U CN202079740U (en) | 2011-04-06 | 2011-04-06 | Conical screw injection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200974744U CN202079740U (en) | 2011-04-06 | 2011-04-06 | Conical screw injection machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202079740U true CN202079740U (en) | 2011-12-21 |
Family
ID=45340394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200974744U Expired - Fee Related CN202079740U (en) | 2011-04-06 | 2011-04-06 | Conical screw injection machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202079740U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108145902A (en) * | 2017-12-21 | 2018-06-12 | 广东德新科技孵化器有限公司 | A kind of anti-blocking high-efficiency injection molding machine |
| CN114874569A (en) * | 2022-06-24 | 2022-08-09 | 包赟元 | PVC furniture board without stabilizer pollution |
-
2011
- 2011-04-06 CN CN2011200974744U patent/CN202079740U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108145902A (en) * | 2017-12-21 | 2018-06-12 | 广东德新科技孵化器有限公司 | A kind of anti-blocking high-efficiency injection molding machine |
| CN114874569A (en) * | 2022-06-24 | 2022-08-09 | 包赟元 | PVC furniture board without stabilizer pollution |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20130406 |