CN212826532U

CN212826532U - Vertical injection molding machine system of preheating

Info

Publication number: CN212826532U
Application number: CN202021728992.7U
Authority: CN
Inventors: 陈智取
Original assignee: Shenzhen Daoming Mould Plastic Technology Co ltd
Current assignee: Shenzhen Daoming Mould Plastic Technology Co ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-03-30
Anticipated expiration: 2030-08-19

Abstract

The utility model provides a vertical injection molding machine system of preheating relates to injection molding machine technical field. The vertical injection molding machine preheating system comprises a plasticizing component, a feeding component and a preheating component. The feeding assembly comprises a storage box, a feeding hopper, a cover plate, a first mounting seat, a material pumping device, a material conveying pipe, a filter screen, a second mounting seat, a driving motor, a first transmission shaft, a plurality of stirring rods, a first driving bevel gear, a first driven bevel gear, a second transmission shaft, a second driving bevel gear, a second driven bevel gear, a material conveying rotating shaft, a fixing piece and a material pushing spiral. The preheating assembly comprises a temperature collection cover, an exhaust pipe and a blower which are sequentially communicated. Vertical injection molding machine system of preheating can be with in the heat introduction feeder hopper that the plastify subassembly gived off to the external world, combine the continuous stirring of stirring rod again, reach the purpose of the moisture in the stoving plastic granules to make the plastic granules obtain better melting effect in the plastify subassembly.

Description

Vertical injection molding machine system of preheating

Technical Field

The utility model belongs to the technical field of the injection molding machine technique and specifically relates to a vertical injection molding machine system of preheating is related to.

Background

The injection molding machine is also called an injection molding machine or an injection machine, a beer machine is called in many factories, and an injection molding product is called a beer piece. The injection molding machine is a main molding device for manufacturing plastic products with various shapes from thermoplastic plastics or thermosetting plastics by using a plastic molding die. The device is divided into a vertical type, a horizontal type and a full-electric type. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. The injection molding machine has a working principle similar to that of an injection syringe for injection, and is a technological process of injecting plastic in a plasticized molten state into a closed mold cavity by means of the thrust of a screw rod, and obtaining a product after solidification and shaping.

The plastic granules may contain some moisture due to long storage before they are melted by heating in the heating cylinder. If the plastic particles containing moisture are directly introduced into the heating charging barrel, the heating effect of the heating charging barrel on the plastic particles is poor, and the plastic particles are difficult to obtain a good melting effect in the heating charging barrel, so that the quality of the product is influenced.

Disclosure of Invention

To the above situation, for overcoming prior art's defect, the utility model provides a vertical injection molding machine system of preheating has solved the plastic granules that has present moisture in heating cylinder, is difficult to obtain fine melting effect to influence the technical problem of the quality of product.

In order to achieve the above object, the utility model provides a following technical scheme:

a vertical injection molding machine preheating system can mainly comprise: plasticizing component, feeding component and preheating component.

And the plasticizing component is used for melting the plastic particles.

The feeding assembly comprises a storage box, a feeding hopper, a cover plate, a first mounting seat, a material pumping device, a material conveying pipe, a filter screen, a second mounting seat, a driving motor, a first transmission shaft, a plurality of stirring rods, a first driving bevel gear, a first driven bevel gear, a second transmission shaft, a second driving bevel gear, a second driven bevel gear, a material conveying rotating shaft, a fixing piece and a material pushing spiral. The storage box is used for storing plastic particles. One side of the cover plate is fixed at the upper end of the feed hopper through a hinge. The material extractor is fixed on the cover plate through a first mounting seat, and two ends of the material extractor are respectively communicated with the storage box and the feed hopper. The both ends opening of conveying pipeline, the lower extreme of conveying pipeline and feeder hopper communicates perpendicularly, and the right-hand member and the plastify subassembly intercommunication of conveying pipeline, the left end installation of conveying pipeline are fixed with the filter screen. The driving motor is fixed on the outer side of the feed hopper through the second mounting seat. The first transmission shaft is connected with an output shaft of the driving motor in a transmission mode, and the first driving bevel gear is fixed on the first transmission shaft. The first driven bevel gear is meshed with the first driving bevel gear and is fixed on the second transmission shaft. One end of the second transmission shaft is fixed on the inner wall of the material conveying pipe, and the other end of the second transmission shaft extends into the upper end of the feed hopper. The stirring rod is fixed on the first transmission shaft. The second driving bevel gear is fixed on the second transmission shaft and meshed with the second driven bevel gear. The second driven bevel gear is fixed on a material conveying rotating shaft, the material conveying rotating shaft is rotatably connected in the material conveying pipe through a fixing piece, and a material pushing spiral is arranged on the material conveying rotating shaft.

The preheating assembly comprises a temperature collection cover, an exhaust pipe and a blower which are sequentially communicated. The heat collecting cover is used for collecting heat emitted outwards by the plasticizing component. The blower is communicated with the feed hopper.

Through the setting of storage case, feeder hopper, apron, first mount pad, extractor and conveying pipeline, can let in the plastify subassembly with the plastic granules in the storage case to melt the plastic granules. Through the second mount pad, driving motor, first transmission shaft, the stirring rod, first initiative bevel gear, first driven bevel gear, the second transmission shaft, second initiative bevel gear, second driven bevel gear, defeated material pivot, the mounting, push away the setting that material spiral and preheating unit spare, can introduce the feeder hopper with the heat that the plastify subassembly gived off to the external world in, the continuous stirring of the stirring rod that reunion combines again reaches the purpose of the moisture in the stoving plastic granules, so that plastic granules obtains better melting effect in the plastify subassembly. The setting of filter screen, the circulation of the air of both having been convenient for to take away the moisture in the plastify subassembly, can avoid the plastic granules to expose from the conveying pipeline again.

In some embodiments of the present invention, the plasticizing component includes an inner material cylinder, an outer material cylinder, a heating ring, a nozzle, a screw, and a screw head.

The inner material barrel is sleeved in the outer material barrel, and the heating ring is fixed between the inner material barrel and the outer material barrel.

The nozzle is fixed at the inner side of the lower end of the inner charging barrel.

The screw head is fixed at the lower end of the screw and penetrates from the upper end of the inner barrel to push out the molten plastic from the nozzle.

The plastic particle melting device has the advantages that the plastic particles can be melted by the arrangement of the inner material cylinder, the outer material cylinder, the heating ring, the nozzle, the screw and the screw head, and the melted plastic particles are injected into a mold.

In some embodiments of the present invention, the screw is sleeved with a non-return ring.

The non-return ring is arranged, so that the screw can be ensured to push out the molten plastic from the nozzle.

In some embodiments of the present invention, the temperature collecting cover is disposed on the outer material cylinder, and the outer side of the temperature collecting cover is bonded with the thermal insulation cover.

The outside of heat collecting cover bonds has the insulation cover, can reduce thermal waste.

In some embodiments of the present invention, the left end of the feeding pipe has an inclined surface.

The inclined plane can prevent sundries from falling into the conveying pipeline from top to bottom to a certain extent, so that the problems of filter screen blockage and the like are solved.

In some embodiments of the present invention, the bottom of the storage box is provided with a movable wheel.

The setting of removing the wheel makes things convenient for the removal of storage case.

In some embodiments of the present invention, the preheating assembly further comprises a heating pipe and a heater. The two ends of the heating pipe are respectively communicated with the feed hopper and the blower. The heater is fixed on the heating pipe.

The heating pipe and the heater are arranged, so that the temperature of air entering the feed hopper can be increased, and the drying effect on plastic particles is improved.

The utility model discloses an in some embodiments, be provided with communicating pipe between above-mentioned glassware and the storage case of taking out, communicating pipe and heating pipe intercommunication.

Communicating pipe and heating pipe intercommunication compare the heating pipe and directly communicate with the feeder hopper, can play certain stoving effect to the plastic granules that are located the communicating pipe to improve the stoving effect to plastic granules.

The embodiment of the utility model provides an at least, have following advantage or beneficial effect:

1. through the setting of storage case, feeder hopper, apron, first mount pad, extractor and conveying pipeline, can let in the plastify subassembly with the plastic granules in the storage case to melt the plastic granules. Through the second mount pad, driving motor, first transmission shaft, the stirring rod, first initiative bevel gear, first driven bevel gear, the second transmission shaft, second initiative bevel gear, second driven bevel gear, defeated material pivot, the mounting, push away the setting that material spiral and preheating unit spare, can introduce the feeder hopper with the heat that the plastify subassembly gived off to the external world in, the continuous stirring of the stirring rod that reunion combines again reaches the purpose of the moisture in the stoving plastic granules, so that plastic granules obtains better melting effect in the plastify subassembly. The setting of filter screen, the circulation of the air of both having been convenient for to take away the moisture in the plastify subassembly, can avoid the plastic granules to expose from the conveying pipeline again.

2. The plastic particle melting device has the advantages that the plastic particles can be melted by the arrangement of the inner material cylinder, the outer material cylinder, the heating ring, the nozzle, the screw and the screw head, and the melted plastic particles are injected into a mold.

3. The thermal insulation sleeve is bonded on the outer side of the heat collection cover, so that the waste of heat can be reduced.

4. The inclined plane can prevent sundries from falling into the conveying pipeline from top to bottom to a certain extent, so that the problems of filter screen blockage and the like are solved.

5. The heating pipe and the heater are arranged, so that the temperature of air entering the feed hopper can be increased, and the drying effect on plastic particles is improved.

6. Communicating pipe and heating pipe intercommunication compare the heating pipe and directly communicate with the feeder hopper, can play certain stoving effect to the plastic granules that are located the communicating pipe to improve the stoving effect to plastic granules.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a vertical injection molding machine preheating system provided by an embodiment of the present invention;

FIG. 2 is a sectional view of a preheating system of a vertical injection molding machine provided in an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of position III of FIG. 2;

fig. 4 is a partial enlarged view of the position iv in fig. 2.

Icon: 100-a vertical injection molding machine preheating system; 111-screw; 113-an outer barrel; 114-an inner barrel; 115-screw head; 116-a heating ring; 117-non-return ring; 119-a nozzle; 131-a material storage box; 132-a moving wheel; 133-a material extractor; 135-feed hopper; 137-cover plate; 138-hinge; 139-communicating tube; 141-a first mount; 143-a second mount; 145-drive motor; 147-a first drive shaft; 149-a first drive bevel gear; 151-second drive shaft; 152-a stirring rod; 153-a first driven bevel gear; 155-second drive bevel gear; 156-a feed delivery pipe; 157-a second driven bevel gear; 158-filtering net; 159-a fixing member; 161-conveying rotating shaft; 163-pusher screw; 171-a temperature collection cover; 173-heat preservation sleeve; 175-an exhaust pipe; 177-a blower; 179-heating tube; 181-heater.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of description and simplification of the description of the embodiments of the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features through another feature not in direct contact. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The plastic granules may contain some moisture due to long storage before they are melted by heating in the heating cylinder. If the plastic particles containing moisture are directly introduced into the heating charging barrel, the heating effect of the heating charging barrel on the plastic particles is poor, and the plastic particles are difficult to obtain a good melting effect in the heating charging barrel, so that the quality of the product is influenced. In order to solve the above problem, the present embodiment provides a vertical injection molding machine preheating system 100.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a vertical injection molding machine preheating system 100, fig. 2 is a sectional diagram of the vertical injection molding machine preheating system 100, fig. 3 is a partial enlarged view of a position iii in fig. 2, and fig. 4 is a partial enlarged view of a position iv in fig. 2. The vertical preheating system 100 for an injection molding machine may mainly include: plasticizing component, feeding component and preheating component.

And the plasticizing component is used for melting the plastic particles.

The feeding assembly comprises a storage box 131, a feed hopper 135, a cover plate 137, a first mounting seat 141, a material extractor 133, a material conveying pipe 156, a filter screen 158, a second mounting seat 143, a driving motor 145, a first transmission shaft 147, a plurality of stirring rods 152, a first driving bevel gear 149, a first driven bevel gear 153, a second transmission shaft 151, a second driving bevel gear 155, a second driven bevel gear 157, a material conveying rotating shaft 161, a fixing piece 159 and a material pushing spiral 163.

The storage bin 131 is used for storing plastic granules. One side of the cover plate 137 is fixed to the upper end of the hopper 135 by a hinge 138. The material extractor 133 is fixed on the cover plate 137 through a first mounting seat 141, and two ends of the material extractor 133 are respectively communicated with the material storage box 131 and the feed hopper 135.

The two ends of the feed delivery pipe 156 are open, the feed delivery pipe 156 is vertically communicated with the lower end of the feed hopper 135, the right end of the feed delivery pipe 156 is communicated with the plasticizing component, and the left end of the feed delivery pipe 156 is fixedly provided with a filter screen 158.

The driving motor 145 is fixed to the outside of the feed hopper 135 by the second mounting seat 143. The first transmission shaft 147 is in transmission connection with an output shaft of the driving motor 145, and the first drive bevel gear 149 is fixed on the first transmission shaft 147. The first driven bevel gear 153 is engaged with the first driving bevel gear 149 and fixed to the second driving shaft 151. One end of the second transmission shaft 151 is fixed to the inner wall of the feed delivery pipe 156, and the other end thereof extends into the upper end of the feed hopper 135. The stirring rod 152 is fixed to the first transmission shaft 147.

The second driving bevel gear 155 is fixed to the second driving shaft 151 and engaged with the second driven bevel gear 157. The second driven bevel gear 157 is fixed on a material conveying rotating shaft 161, the material conveying rotating shaft 161 is rotatably connected in the material conveying pipe 156 through a fixing member 159, and a material pushing screw 163 is arranged on the material conveying rotating shaft 161.

The preheating assembly comprises a temperature collection cover 171, an exhaust pipe 175 and a blower 177 which are communicated in sequence. The heat collecting cover 171 is used for collecting heat dissipated from the plasticizing component. The blower 177 is in communication with the feed hopper 135.

Through the arrangement of the storage tank 131, the feed hopper 135, the cover plate 137, the first mounting seat 141, the material extractor 133 and the material conveying pipe 156, plastic particles in the storage tank 131 can be introduced into the plasticizing component, so as to melt the plastic particles. Through the arrangement of the second mounting seat 143, the driving motor 145, the first transmission shaft 147, the stirring rod 152, the first driving bevel gear 149, the first driven bevel gear 153, the second transmission shaft 151, the second driving bevel gear 155, the second driven bevel gear 157, the material conveying rotating shaft 161, the fixing member 159, the material pushing screw 163 and the preheating component, heat emitted from the plasticizing component to the outside can be introduced into the feed hopper 135, and then the continuous stirring of the stirring rod 152 is combined to achieve the purpose of drying moisture in the plastic particles, so that the plastic particles can be better melted in the plasticizing component. The filter screen 158 is provided to facilitate the circulation of air to remove moisture from the plasticizing assembly and to prevent plastic particles from emerging from the feed conduit 156.

Specifically, the plasticizing assembly may generally include an inner barrel 114, an outer barrel 113, a heating ring 116, a nozzle 119, a screw 111, and a screw 111 head.

The inner barrel 114 is sleeved in the outer barrel 113, and the heating ring 116 is fixed between the inner barrel 114 and the outer barrel 113.

The nozzle 119 is fixed inside the lower end of the inner barrel 114.

The head of the screw 111 is fixed to the lower end of the screw 111 and penetrates from the upper end of the inner barrel 114 to push out the molten plastic from the nozzle 119.

Specifically, the screw 111 is sleeved with a check ring 117. The provision of the non-return ring 117 ensures that the screw 111 pushes the molten plastic out of the nozzle 119.

Specifically, the heat collecting cover 171 is fitted over the outer cylinder 113, and a heat insulating cover 173 is bonded to the outside of the heat collecting cover 171. The thermal insulating cover 173 is bonded to the outside of the heat collecting cover 171, so that waste of heat can be reduced.

Specifically, the left end of the feed delivery pipe 156 has a slant surface. The inclined plane can prevent sundries from falling into the material conveying pipe 156 from top to bottom to cause the problems of blockage of the filter screen 158 and the like to a certain extent.

Specifically, the bottom of the hopper 131 is mounted with a moving wheel 132.

Specifically, the preheat assembly may also include a heating tube 179 and a heater 181. Both ends of the heating pipe 179 are respectively communicated with the feed hopper 135 and the blower 177. The heater 181 is fixed to the heating pipe 179. The arrangement of the heating pipe 179 and the heater 181 can raise the temperature of the air entering the hopper 135 to improve the drying effect of the plastic particles.

Specifically, a communication pipe 139 is provided between the ejector 133 and the storage tank 131, and the communication pipe 139 communicates with the heating pipe 179. Communicating pipe 139 is communicated with heating pipe 179, compares that heating pipe 179 is direct to be communicated with feeder hopper 135, can play certain stoving effect to the plastic granules that are located communicating pipe 139 to improve the stoving effect to the plastic granules.

The working principle of the vertical injection molding machine preheating system 100 is as follows:

the vertical injection molding machine preheating system provided by the embodiment mainly comprises: plasticizing component, feeding component and preheating component. The feeding assembly comprises a storage box 131, a feed hopper 135, a cover plate 137, a first mounting seat 141, a material extractor 133, a material conveying pipe 156, a filter screen 158, a second mounting seat 143, a driving motor 145, a first transmission shaft 147, a plurality of stirring rods 152, a first driving bevel gear 149, a first driven bevel gear 153, a second transmission shaft 151, a second driving bevel gear 155, a second driven bevel gear 157, a material conveying rotating shaft 161, a fixing piece 159 and a material pushing spiral 163. The driving motor 145 is fixed to the outside of the feed hopper 135 by the second mounting seat 143. The first transmission shaft 147 is in transmission connection with an output shaft of the driving motor 145, and the first drive bevel gear 149 is fixed on the first transmission shaft 147. The first driven bevel gear 153 is engaged with the first driving bevel gear 149 and fixed to the second driving shaft 151. One end of the second transmission shaft 151 is fixed to the inner wall of the feed delivery pipe 156, and the other end thereof extends into the upper end of the feed hopper 135. The stirring rod 152 is fixed to the first transmission shaft 147. The second driving bevel gear 155 is fixed to the second driving shaft 151 and engaged with the second driven bevel gear 157. The second driven bevel gear 157 is fixed on a material conveying rotating shaft 161, the material conveying rotating shaft 161 is rotatably connected in the material conveying pipe 156 through a fixing member 159, and a material pushing screw 163 is arranged on the material conveying rotating shaft 161. The preheating assembly comprises a temperature collection cover 171, an exhaust pipe 175 and a blower 177 which are communicated in sequence. The heat collecting cover 171 is used for collecting heat dissipated from the plasticizing component. The blower 177 is in communication with the feed hopper 135.

When the vertical injection molding machine preheating system 100 is used, the extractor 133 guides the plastic particles into the feed hopper 135, and the driving motor 145 simultaneously drives the stirring rod 152 and the feeding rotary shaft 161 to rotate. The rotation of the stirring rod 152 continuously stirs the plastic granules, and at the same time, the blower 177 introduces heat, which is released from the heating ring 116 to the outside when heating the plastic granules, into the feeding hopper 135 to dry the plastic granules. The rotation of the feeding shaft 161 can push the plastic particles into the inner barrel 114, and the plastic particles are melted by the heating ring 116. The screw 111 can push molten plastic pellets from the nozzle 119 into the mold.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical injection molding machine preheating system, comprising:

a plasticizing assembly for melting plastic pellets;

the feeding assembly comprises a storage box, a feeding hopper, a cover plate, a first mounting seat, a material pumping device, a material conveying pipe, a filter screen, a second mounting seat, a driving motor, a first transmission shaft, a plurality of stirring rods, a first driving bevel gear, a first driven bevel gear, a second transmission shaft, a second driving bevel gear, a second driven bevel gear, a material conveying rotating shaft, a fixing piece and a material pushing screw; the storage box is used for storing plastic particles; one side of the cover plate is fixed at the upper end of the feed hopper through a hinge; the material extractor is fixed on the cover plate through the first mounting seat, and two ends of the material extractor are respectively communicated with the material storage box and the feed hopper; the two ends of the feed delivery pipe are open, the feed delivery pipe is vertically communicated with the lower end of the feed hopper, the right end of the feed delivery pipe is communicated with the plasticizing component, and a filter screen is fixedly arranged at the left end of the feed delivery pipe; the driving motor is fixed on the outer side of the feed hopper through a second mounting seat; the first transmission shaft is in transmission connection with an output shaft of the driving motor, and the first driving bevel gear is fixed on the first transmission shaft; the first driven bevel gear is meshed with the first driving bevel gear and is fixed on the second transmission shaft; one end of the second transmission shaft is fixed on the inner wall of the material conveying pipe, and the other end of the second transmission shaft extends into the upper end of the feed hopper; the stirring rod is fixed on the first transmission shaft; the second driving bevel gear is fixed on the second transmission shaft and meshed with the second driven bevel gear; the second driven bevel gear is fixed on the material conveying rotating shaft, the material conveying rotating shaft is rotatably connected in the material conveying pipe through the fixing piece, and a material pushing spiral is arranged on the material conveying rotating shaft;

the preheating assembly comprises a temperature collection cover, an exhaust pipe and a blower which are sequentially communicated; the temperature collection cover is used for collecting heat emitted outwards by the plasticizing component; the air blower is communicated with the feed hopper.

2. The vertical injection molding machine preheating system of claim 1, wherein the plasticizing assembly comprises an inner barrel, an outer barrel, a heating ring, a nozzle, a screw, and a screw head;

the inner material cylinder is sleeved in the outer material cylinder, and the heating ring is fixed between the inner material cylinder and the outer material cylinder;

the nozzle is fixed on the inner side of the lower end of the inner charging barrel;

the screw head is fixed at the lower end of the screw and penetrates from the upper end of the inner material barrel to push out the molten plastic from the nozzle.

3. The vertical injection molding machine preheating system of claim 2, wherein a non-return ring is sleeved on the screw.

4. The vertical preheating system for injection molding machines as claimed in claim 2, wherein the heat collecting cover is sleeved on the outer barrel, and a heat insulating sleeve is bonded to the outer side of the heat collecting cover.

5. The system of claim 1, wherein said feed conveyor pipe has a beveled surface at a left end thereof.

6. The vertical injection molding machine preheating system of claim 1, wherein the bottom of the magazine is fitted with moving wheels.

7. The vertical injection molding machine preheating system according to any one of claims 1 to 6, wherein the preheating assembly further comprises a heating pipe and a heater; two ends of the heating pipe are respectively communicated with the feed hopper and the blower; the heater is fixed on the heating pipe.

8. The vertical injection molding machine preheating system of claim 7, wherein a communicating pipe is provided between the material extractor and the material storage tank, the communicating pipe being in communication with the heating pipe.