CN105751455A

CN105751455A - Spiral coil and plunger combined type injection molding device

Info

Publication number: CN105751455A
Application number: CN201610263500.3A
Authority: CN
Inventors: 陈学锋; 凃明霞; 徐言生; 胡建国; 柯美元; 曾宪荣
Original assignee: Shunde Vocational and Technical College
Current assignee: Lingbi branch of Anhui Yinuo Youth Industrial Design Co., Ltd
Priority date: 2016-04-25
Filing date: 2016-04-25
Publication date: 2016-07-13
Anticipated expiration: 2036-04-25
Also published as: CN105751455B

Abstract

The invention relates to a spiral coil and plunger combined type injection molding device.The device comprises an injection oil cylinder, an injection seat frame, a motor, a transmission mechanism, a base, an angular-contact bearing, a hopper, a cylinder, an electric heater, a movable oil cylinder, a gear and a plunger.The device is characterized by further comprising a plasticized spiral coil, the plasticized spiral coil comprises a turnplate and a cylindrical body, three or more external circumference screw channels are formed in the cylindrical surface of the turnplate, three or more end face screw channels are formed in the right end face of the turnplate, and the right end of each external circumference screw channel is communicated with the corresponding end face screw channel; center holes are formed in the turnplate and the cylindrical body; the cylinder comprises a cylindrical plasticization chamber and an injection cylinder, the turnplate is located in the plasticization chamber and can rotate, the hopper is installed on the plasticization chamber, the left end of each external circumference screw channel is communicated with the hopper through a radial hole, and each end face screw channel is communicated with the right end of the corresponding external circumference screw channel and the left end of the injection cylinder; the plunger is in clearance fit with the injection cylinder.The device has the advantages that structure is simple and compact, a charging barrel is convenient to clean, plasticizing capacity, smashing capacity and extruding capacity are high, and the quality of products is high.

Description

Spiral shell dish and plunger combination formula Coinjection molding apparatus

Technical field

The present invention relates to a kind of spiral shell dish and plunger combination formula Coinjection molding apparatus, be mainly used in the plasticizing to macromolecular material and injection moulding, belong to macromolecular material injection molding technology field.

Background technology

Injection-moulding plastic processing has advantages such as technique is simple, production efficiency is high, product size is accurate, and can the more complicated goods of one-shot forming profile in the short period of time.

Plasticizing injecting device is one of injection forming equipment core texture, and the quality of its performance not only directly influences the problems such as injection molding efficiency, production cost and production environment, but also the quality of injected articles is had conclusive impact.

Present modal plasticizing injecting device has two kinds, first screw plunger type, and it two is reciprocating screw type.

Traditional screw plunger type injection (mo(u)lding) machine, it is on plunger injection device, add a set of Single screw extrusion feeding device only doing plasticizing, material need to first pass through single spiro rod plasticizing device and plastify, then injection barrel is entered through check valve, when feed quantity reaches variable, plasticized screw stops operating, and injection piston starts injection.

Traditional reciprocating screw type injection (mo(u)lding) machine, screw rod has plasticizing and two functions of injection simultaneously, screw rod is done gyration and material is plastified, also to do reciprocal axially-movable to inject simultaneously, therefore the complexity of total system is high, and cost is big, when plasticizing, moving axially along with screw rod, makes melting material form the axial temperature difference being difficult to overcome.

Conventional injection machine also has a common feature, that is, generally all adopt screw rod to carry out plastifying material, although utilizing spiro rod plasticizing to have its advantage, but for some material, screw rod has the shortcoming that plasticizing, pulverizing and extrusion capability are not strong.

For conventional injection machine Problems existing, explore despite many researcheres, but the local being all limited only to screw rod or plunger are carried out has changed, it does not have changed the basic reason that above-mentioned total system exists.

In numerous research worker, there is part researcher that vibration is incorporated into plastics forming field, utilize spiral shell vibration of bar on the impact of material plasticizing extrusion to optimize extrusion process, improve extruded product quality.

Part researcher is also had to utilize the vibration of plunger or piston to reach to optimize the purpose of plasticizing, extrusion and the injection course of processing.Foreign literature^[1,2]The stream describing its development becomes injection (mo(u)lding) machine, and first polymer melt is injected vibration cavity, the direction of switching valve by barrel under screw acting, and is applied vibration by piston.Then injected mold cavity by piston, while pressurize, continue to make melt to be under pressure before mould gate freezes effect of vibration.

In sum, in the existing research that injection, extrusion introducing are vibrated, have plenty of by screw rod applying vibration is optimized injection, extrusion, have plenty of by the plunger not being arranged in same machine barrel with screw rod or piston are applied vibration, thus polymer melt being produced impact, and then improve the performance of end article.

List of references:

[1IbarJP.Controlofpolymerpropertiesbymeltvibrationtechnology:areview.PolymerEngineeringandScience.1998;38(1):1-20

[2]A.Minardi,M.Boudeulle,E.Duval,SEtienne.Effectofthemouldingconditionsonthesemicrystallinestructureofpolypropylene.Polymer.1997,38(15):3957-3965。

Summary of the invention

It is an object of the invention to overcome the deficiencies in the prior art to provide a kind of spiral shell dish and plunger combination formula Coinjection molding apparatus, various materials are had very strong plasticizing, pulverizing and extrusion capability by it, owing to introducing vibration in the course of processing, production process is enhanced, good product quality.

In order to achieve the above object, the present invention is realized in, it is a kind of spiral shell dish and plunger combination formula Coinjection molding apparatus, including injection cylinder, injection mounting, motor, drive mechanism, stand, radial thrust bearing, hopper, machine barrel, electric heater, Shift cylinder, gear and plunger；Described injection cylinder, motor, drive mechanism and machine barrel are installed on injection mounting, and the push rod of described Shift cylinder is connected with injection mounting；Characterized by further comprising plasticizing spiral shell dish, described plasticizing spiral shell dish includes rotating disk and cylinder in conjunction, the face of cylinder of described rotating disk is provided with the excircle screw channel of more than three, the right side of rotating disk is provided with the end face screw channel of more than three, the right-hand member of described excircle screw channel and end face screw channel UNICOM；Rotating disk and cylinder are provided with centre bore；Described machine barrel includes cylindrical plasticizing chamber and injection tube, and rotating disk is arranged in plasticizing chamber and rotatable, and described hopper is arranged on plasticizing chamber, and the left end of excircle screw channel connects with hopper, the right-hand member of end face screw channel UNICOM excircle screw channel and the left end of injection tube；Described radial thrust bearing and gear are installed on the cylinder of plasticizing spiral shell dish, and radial thrust bearing is arranged on stand；The right-hand member of described plunger is through rotating disk and cylindrical centre bore and is positioned at injection tube, plunger and injection tube matched in clearance, and plunger is in rotating disk and cylindrical centre bore and injection tube and is axially movable.

Described spiral shell dish and plunger combination formula Coinjection molding apparatus, it is characterised in that also include motion controller and vibrating device, described motion controller controls the vibration of vibrating device, and described vibrating device is arranged between the push rod of plunger and injection cylinder.

In the technical program, described vibrating device drives the motion made of plunger to be: axial vibration, circular vibration, carry out axial vibration and circular vibration simultaneously, or vibrating device drives plunger to do circumference rotary motion.

In the technical program, it is divided into two kinds of different situations.

The situation one of the technical program, the endoporus of described injection tube is clear opening, the full section of endoporus of described plunger right part external cylindrical surface and injection tube has the gap that melting material can be made to pass through, and plunger is when any axial location of injection tube, and the melting material plastified all can pass under pressure through gap and enter right-hand member.

The situation two of the technical program, the endoporus of described injection tube is shoulder hole, the big position of shoulder hole mesoporous and plasticizing chamber UNICOM, the position that shoulder hole mesoporous is little connects with injection orifice, there is certain gap at the position that described plunger right part external cylindrical surface is big with shoulder hole mesoporous, the melting material plastified can pass under pressure through this gap and enter right section of injection tube, and the plunger right part external cylindrical surface position little with shoulder hole mesoporous is for being slidably matched but melting material cannot be passed through from its fit clearance.

In another technical scheme, the right-hand member at described plunger is provided with the check valve or checking head that prevent material from flowing backwards, and described check valve or checking head are positioned at injection tube, check valve or checking head and are axially movable at injection tube.

The present invention compared with prior art, has the advantage that

1. the plasticizing part plastifying spiral shell dish have employed the cylindrical outer circumference screw channel+end face screw channel structure of more than three, this kind of method changes classic screw plasticizing mode, external screw thread groove and end face screw channel is utilized to carry out plasticized extrudate material, it is the change in a kind of principle and lifting, it has extruding, pulverizing, mixing, advantage that plasticizing capacity is strong, being conducive to the plasticizing of material and melted, those are difficult to the material of plasticizing processing, this point is especially beneficial.

2. induce one macromolecular material process of injection molding by vibration, can substantially optimize the course of processing, the effective viscoelasticity and the viscosity that make macromolecular material melt reduce, flow rate increases, the mixing of material is sheared and is strengthened, it is obviously improved the performance of moulded products, by injection molded article after applying vibration is carried out mechanical property, DSC and density measurement, find that stretching and the impact strength of injection molded article improve, density becomes big, the degree of crystallinity of sample improves, and goods interior quality and presentation quality are all greatly improved and improve.

3., compared to the vibration of other forms introduced in plastics forming, this patent has advantage simple and reliable for structure.

Accompanying drawing explanation

Fig. 1 is the structural representation of the embodiment of the present invention one；

Fig. 2 is the structural representation of machine barrel in Fig. 1；

Fig. 3 is the structural representation plastifying spiral shell dish in Fig. 1；

Fig. 4 is plasticizing spiral shell dish end face screw channel schematic diagram in Fig. 3；

Fig. 5 is the structural representation of the embodiment of the present invention two；

Fig. 6 is the structural representation of the embodiment of the present invention three.

Detailed description of the invention

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.At this it should be noted that be adapted to assist in for the explanation of these embodiments and understand the present invention, but it is not intended that limitation of the invention.As long as just can be combined with each other additionally, technical characteristic involved in each embodiment of invention described below does not constitute conflict each other.

In the present description, orientation or the position relationship of the instruction such as term " left side " and " right side " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention rather than requires that the present invention with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.

Embodiment one

As shown in Figures 1 to 4, it is a kind of spiral shell dish and plunger combination formula Coinjection molding apparatus, including injection cylinder 1, injection mounting 2, motor 3, drive mechanism 4, stand 5, radial thrust bearing 6, hopper 7, machine barrel 9, electric heater 10, Shift cylinder 13, gear 14 and plunger 15；

Described injection cylinder 1, motor 3 and drive mechanism 4 are installed on injection mounting 2, and the push rod of described Shift cylinder 13 is connected with injection mounting 2, and the push rod of such Shift cylinder 13 can promote injection mounting 2 to move；

Described plasticizing spiral shell dish 8 includes rotating disk 81 and cylinder 82, described cylinder 82 is positioned at the left end of rotating disk 81, the face of cylinder of described rotating disk 81 is provided with the excircle screw channel 811 of more than three, the right side of rotating disk 81 is provided with the end face screw channel 812 of more than three, the right-hand member of described excircle screw channel 811 and end face screw channel 812 UNICOM；Rotating disk 81 and cylinder 82 are provided with centre bore；Excircle screw channel 811 and end face screw channel 812 should be identical, it is possible to be three, four, five or more a plurality of；

Described machine barrel 9 is arranged on injection mounting 2, machine barrel 9 includes cylindrical plasticizing chamber 91 and injection tube 92, rotating disk 81 is arranged in plasticizing chamber 91 and rotatable, described hopper 7 is arranged on plasticizing chamber 91, the left end of excircle screw channel 811 connects with hopper 7 by plastifying the radial hole on chamber 91, the right-hand member of end face screw channel 812 UNICOM excircle screw channel 811 and the left end of injection tube 92；Excircle screw channel 811 and end face screw channel 812, as crushing material, mixing, mill pressure, plasticizing and transfer passages, complete the plastifying fusion to material；

Described radial thrust bearing 6 and gear 14 are installed on cylinder 82, and radial thrust bearing 6 is arranged on stand 5；The right-hand member of described plunger 15 is through the centre bore of rotating disk 81 and cylinder 82 and is positioned at injection tube 92, plunger 15 and injection tube 92 matched in clearance, and plunger 15 is in the centre bore and injection tube 92 of rotating disk 81 and cylinder 82 and is axially movable.

In order to make fused materials inject die cavity in a pulsing mode, also include motion controller 12 and vibrating device 11 in the present embodiment, described motion controller 12 controls the vibration of vibrating device 11, and described vibrating device 11 is arranged on plunger 15 and between the push rod of injection cylinder 1；Described vibrating device 11 drives the motion that plunger 15 is made to be: axial vibration, circular vibration, carry out axial vibration and circular vibration simultaneously, or vibrating device 11 drives plunger 15 to do circumference rotary motion.

nullDuring work，Motor 3 drives plasticizing spiral shell dish 8 to rotate by drive mechanism 4 and gear 14，Plastify the external peripheral threads groove 811 on spiral shell dish 8 and end face helicla flute 812 as crushing material、Mixing、Mill pressure、Plasticizing and transfer passages，Material in hopper 7 enters external peripheral threads groove 811 by the radially fed hole in the plasticizing chamber 91 of machine barrel 9，Move right rotating under spiral shell rib promotes，Subsequently enter end face helicla flute 812，Then move to direction, the center of circle along end face helicla flute 812，Finally move to the direction of injection nozzle in injection tube 92，After system completes matched moulds process，Shift cylinder 13 drives injection mounting 2 to move to right，And drive includes injection cylinder 1、Motor 3、Drive mechanism 4 and machine barrel 9 move right at interior overall plasticizing injecting systems，The UNICOM until injection nozzle and mould are fitted，Then in injection cylinder 1, pressure oil is passed into again，Promote vibrating device 11 and plunger 15 for linear motion in the injection tube 92 of machine barrel 9，And meanwhile，Vibrating device 11 can drive plunger 15 to vibrate，Fused materials in injection tube 92 is injected die cavity in a pulsing mode，And make plunger 15 carry out continuous print pressurize and feeding，The vibration of plunger 15 is always maintained at until workpiece cooling and shaping in die cavity；Then plunger 15 retreats from the injection tube 92 of machine barrel 9, rotates spiral shell dish 8 and starts the motion of next round rotating plasticization.

Embodiment two

As shown in Figure 5, it is a kind of spiral shell dish and plunger combination formula Coinjection molding apparatus, its structure and working principle is substantially identical with embodiment one, institute the difference is that institute the difference is that described injection tube 92 be shoulder hole, the position that shoulder hole mesoporous is big connects with plasticizing chamber 91, the position that shoulder hole mesoporous is little connects with injection orifice, one section that the periphery of described plunger 15 right part is big with shoulder hole mesoporous has certain gap, the melting material plastified can pass under pressure through this gap and enter right section of injection tube 92, the little position of the periphery of plunger 15 right part and injection tube 92 shoulder hole mesoporous is for being slidably matched, but melting material cannot be passed through from its fit clearance, but the position volume that shoulder hole mesoporous is little have to be larger than the minimum injection rate set by injector.Operation principle is essentially identical with embodiment one, no longer repeats.

Embodiment three

As shown in Figure 6, it is a kind of spiral shell dish and plunger combination formula Coinjection molding apparatus, its structure and working principle is substantially identical with embodiment one, the difference is that the right-hand member at plunger 15 is equipped with check valve 16(or checking head 16), described check valve 16(or checking head 16) it is positioned at injection tube 92, check valve 16(or checking head 16) be axially movable at injection tube 92.Checking head is a kind of device that fused materials flows backwards when preventing from injecting, and its operation principle and check valve are very much like, due to technique comparative maturity, and non-this patent key content, therefore no longer checking head structural principle is described at this.

During work, motor 3 drives plasticizing spiral shell dish 8 to rotate by drive mechanism 4 and gear 14, plastify the external peripheral threads groove 811 on spiral shell dish 8 and end face helicla flute 812 as crushing material, mixing, mill pressure, plasticizing and transfer passages, material in hopper 7 enters external peripheral threads groove 811 by the charging hole in the plasticizing chamber 91 of machine barrel 9, move right rotating under spiral shell rib promotes, subsequently enter end face helicla flute 812, then move to direction, the center of circle along end face helicla flute 812, the injection tube 92 of most tailing edge machine barrel 9 moves right, by the check valve 16(of plunger 15 right-hand member or checking head 16) it is full of the leading section in the injection tube 92 on the right of machine barrel 9；After system completes matched moulds process, Shift cylinder 13 drives injection mounting 2 to move to right, and drive includes injection cylinder 1, motor 3, drive mechanism 4 and machine barrel 9 move right at interior overall plasticizing injecting systems, the UNICOM until injection nozzle and mould are fitted, then in injection cylinder 1, pressure oil is passed into again, promote plunger 15 and check valve 16(or checking head 16) for linear motion in the injection tube 92 of machine barrel 9, and meanwhile, vibrating device 11 can drive plunger 15 and check valve 16(or checking head 16) vibrate, fused materials in the injection tube 92 of machine barrel 9 is injected die cavity in a pulsing mode, and make check valve or checking head 16 carry out continuous print pressurize and feeding, its vibration is always maintained at until workpiece cooling and shaping in die cavity；Then plunger 15 drives check valve 16(or checking head 16) retreat in the injection tube 92 of machine barrel 9, plasticizing spiral shell dish 8 starts the motion of next round rotating plasticization.

Above in association with accompanying drawing, embodiments of the present invention are made detailed description, but the present invention is not limited to described embodiment.For the ordinary skill in the art, when without departing from principles of the invention and objective, these embodiments are carried out multiple change, amendment, replacement and deformation to still fall within protection scope of the present invention.

Claims

1. spiral shell dish and a plunger combination formula Coinjection molding apparatus, including injection cylinder (1), injection mounting (2), motor (3), drive mechanism (4), stand (5), radial thrust bearing (6), hopper (7), machine barrel (9), electric heater (10), Shift cylinder (13), gear (14) and plunger (15)；Described injection cylinder (1), motor (3), drive mechanism (4) and machine barrel (9) are installed in injection mounting (2), and the push rod of described Shift cylinder (13) is connected with injection mounting (2)；Characterized by further comprising plasticizing spiral shell dish (8), described plasticizing spiral shell dish (8) includes rotating disk (81) and cylinder (82) in conjunction, the face of cylinder of described rotating disk (81) is provided with the excircle screw channel (811) of more than three, the right side of rotating disk (81) is provided with the end face screw channel (812) of more than three, the right-hand member of described excircle screw channel (811) and end face screw channel (812) UNICOM；Rotating disk (81) and cylinder (82) are provided with centre bore；Described machine barrel (9) includes cylindrical plasticizing chamber (91) and injection tube (92), rotating disk (81) is arranged in plasticizing chamber (91) and rotatable, described hopper (7) is arranged in plasticizing chamber (91), the left end of excircle screw channel (811) connects with hopper (7), the left end of the right-hand member of end face screw channel (812) UNICOM excircle screw channel (811) and injection tube (92)；Described radial thrust bearing (6) and gear (14) are installed on cylinder (82), and radial thrust bearing (6) is arranged on stand (5)；The right-hand member of described plunger (15) passes the centre bore of rotating disk (81) and cylinder (82) and is positioned at injection tube (92), plunger (15) and injection tube (92) matched in clearance, plunger (15) is in the centre bore and injection tube (92) of rotating disk (81) and cylinder (82) and is axially movable.

2. spiral shell dish according to claim 1 and plunger combination formula Coinjection molding apparatus, characterized by further comprising motion controller (12) and vibrating device (11), described motion controller (12) controls the vibration of vibrating device (11), and described vibrating device (11) is arranged between the push rod of plunger (15) and injection cylinder (1).

3. spiral shell dish according to claim 2 and plunger combination formula Coinjection molding apparatus, it is characterized in that described vibrating device (11) drives plunger (15) motion made to be: axial vibration, circular vibration, carry out axial vibration and circular vibration simultaneously, or vibrating device (11) drives plunger (15) to do circumference rotary motion.

4. spiral shell dish according to claim 1 and plunger combination formula Coinjection molding apparatus, it is characterized in that the endoporus of described injection tube (92) is clear opening, the full section of endoporus of described plunger (15) right part external cylindrical surface and injection tube (92) has the gap that melting material can be made to pass through, plunger (15) is when injection tube (92) any axial location, and the melting material plastified all can pass under pressure through gap and enter right-hand member.

5. spiral shell dish according to claim 1 and plunger combination formula Coinjection molding apparatus, it is characterized in that the endoporus of described injection tube (92) is shoulder hole, the big position of shoulder hole mesoporous and plasticizing chamber (91) UNICOM, the position that shoulder hole mesoporous is little connects with injection orifice, there is gap at the position that described plunger (15) right part external cylindrical surface is big with shoulder hole mesoporous, the melting material plastified can pass under pressure through this gap and enter right section of injection tube (92), the little position of plunger (15) right part external cylindrical surface and shoulder hole mesoporous is for being slidably matched but melting material cannot be passed through from its fit clearance.

6. spiral shell dish according to claim 1 and plunger combination formula Coinjection molding apparatus, it is characterized in that being provided with the check valve preventing material from flowing backwards or checking head (16) at the right-hand member of described plunger (11), described check valve or checking head (16) are positioned at injection tube (92), check valve or checking head (11) and are axially movable at injection tube (92).