CN213704434U - Hot-melting injection device for food plastic container - Google Patents

Abstract

The utility model relates to the technical field of hot melt injection devices, in particular to a hot melt injection device for food plastic containers; the injection pressure can be effectively improved, so that the molten material is fully injected into the mold, and the quality of an injection molding product is improved; the device comprises a spiral extruder, wherein the spiral extruder comprises an extrusion charging barrel, a speed reducing motor and a spiral extrusion rod, and an electric heating device is coated on the outer wall of the extrusion charging barrel; still include the mount table, first pressurization injection mechanism, second pressurization injection mechanism, first three-way pipe, the second three-way pipe, first material valve, the second material valve, third material valve and fourth material valve, spiral extruder fixed set up in the top rear portion of mount table, first pressurization injection mechanism and second pressurization injection mechanism are fixed respectively and are set up in the top left front portion and the right front portion of mount table, first pressurization injection mechanism and second pressurization injection mechanism all include the injection tube, hydraulic stem and piston, the output of second three-way pipe is provided with the injection head.

Description

Hot-melting injection device for food plastic container

Technical Field

The utility model relates to a hot melt injection device's technical field especially relates to a food plastic container hot melt injection device.

Background

As is well known, a hot-melt injection device for plastic containers for food is a device for heating and melting powdery raw materials and extruding and injecting the molten materials; the existing hot melting injection device for the food plastic container generally adopts a spiral extruder, the spiral extruder comprises an extrusion material cylinder, a speed reduction motor and a spiral extrusion rod, a cavity is arranged in the extrusion material cylinder, the spiral extrusion rod is rotatably arranged in the cavity, the output end of the speed reduction motor is in transmission connection with the spiral extrusion rod, the rear part of the top end of the extrusion material cylinder is provided with a feed hopper communicated with the cavity, the front end of the extrusion material cylinder is provided with a discharge pipe communicated with the cavity, and the outer wall of the extrusion material cylinder is coated with an electric heating device; when the existing food plastic container hot-melting injection device is used, the electric heating device is started to preheat the extrusion charging barrel, the powdery material is added into the cavity through the feeding hopper, the speed reducing motor is started to drive the spiral extrusion rod to rotate, the powdery material is heated into a molten state in the cavity, and the spiral extrusion rod extrudes and injects the molten material into an external mold through the discharging pipe; the existing hot-melting injection device for the food plastic container is discovered in use, when a screw extrusion rod is used for extruding molten materials, the extrusion pressure is small, the situation that the materials in a mold are not sufficient is easily caused, and therefore the production quality of injection molding products is influenced, and certain use limitation is realized.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a can effectively improve injection pressure, make the melting material fill and pour into to the mould in, improve the food plastic container hot melt injection device of injection moulding article quality.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the screw extruder comprises an extruding barrel, a speed reducing motor and a screw extruding rod, wherein a cavity is arranged in the extruding barrel, the screw extruding rod is rotatably arranged in the cavity, the output end of the speed reducing motor is in transmission connection with the screw extruding rod, the rear part of the top end of the extruding barrel is provided with a feed hopper communicated with the cavity, the front end of the extruding barrel is provided with a discharge pipe communicated with the cavity, and the outer wall of the extruding barrel is coated with an electric heating device; the screw extruder is fixedly arranged at the rear part of the top end of the mounting platform, the first pressurizing injection mechanism and the second pressurizing injection mechanism are respectively fixedly arranged at the left front part and the right front part of the top end of the mounting platform, the input end of the first three-way pipe is communicated with the output end of the discharge pipe, the first pressurizing injection mechanism and the second pressurizing injection mechanism respectively comprise an injection tube, a hydraulic rod and a piston, an injection cavity is arranged in the injection tube, the piston is matched with the injection cavity, the piston can be arranged in the injection cavity in a left-right sliding manner, the hydraulic rod is fixedly arranged on the mounting platform, and the output end of the hydraulic rod is in transmission connection with the piston, the left output end of the first three-way pipe is communicated with the right part of an injection cavity on the first pressurizing injection mechanism, the first material valve is arranged at the left output end of the first three-way pipe, the right output end of the first three-way pipe is communicated with the left part of the injection cavity on the second pressurizing injection mechanism, the second material valve is arranged at the right output end of the first three-way pipe, the left input end of the second three-way pipe is communicated with the right part of the injection cavity on the first pressurizing injection mechanism, the third material valve is arranged at the left input end of the second three-way pipe, the right input end of the second three-way pipe is communicated with the left part of the injection cavity on the second pressurizing injection mechanism, the fourth material valve is arranged at the right input end of the second three-way pipe, and the output end of the second three-way pipe is provided with an injection head.

Preferably, the outer walls of the injection cylinders of the first pressurizing injection mechanism and the second pressurizing injection mechanism are spirally wound with heating wires.

Preferably, the outer walls of the injection cylinders on the first pressurizing injection mechanism and the second pressurizing injection mechanism are coated with insulating layers, and the electric heating wire is positioned between the insulating layers and the outer walls of the injection cylinders.

Preferably, the injection head is detachably connected with the output end of the second three-way pipe through a bolt.

Preferably, the inner walls of the injection cavities of the first pressurizing injection mechanism and the second pressurizing injection mechanism are provided with wear-resistant ceramic lining layers.

(III) advantageous effects

Compared with the prior art, the utility model provides a food plastic container hot melt injection device possesses following beneficial effect: the food plastic container hot melting injection device preheats an extrusion charging barrel by starting an electric heating device, powder materials are added into a cavity through a feed hopper, a speed reducing motor is started to drive a spiral extrusion rod to rotate, the powder materials are heated into a molten state in the cavity, the spiral extrusion rod extrudes the molten materials through a discharge pipe, a first material valve is opened, a third material valve is closed, a second material valve and a fourth material valve are both in a closed state, a hydraulic rod on a first pressurizing injection mechanism is started, the output end of the hydraulic rod is shortened, a piston moves leftwards along the injection cavity, negative pressure is formed in the injection cavity on the first pressurizing injection mechanism, the molten materials enter the injection cavity, the first material valve is closed, the third material valve is opened, the hydraulic rod on the first pressurizing injection mechanism is extended, the piston moves rightwards, the molten materials in the injection cavity on the first pressurizing mechanism are pressurized and then injected into an external mold through an injection head, meanwhile, the second material valve is opened, the fourth material valve is in a closed state, the hydraulic rod on the second pressurizing injection mechanism is started, the piston moves rightwards, the molten material enters an injection cavity on the second pressurizing injection mechanism, after the injection of the material in the injection tube on the first pressurizing injection mechanism is finished, the first material valve and the fourth material valve are opened, the second material valve and the third material valve are closed, the hydraulic rod on the second pressurizing injection mechanism is started, the output end of the hydraulic rod extends, the piston moves leftwards, the material in the injection tube on the second pressurizing injection mechanism is injected into an external mold through an injection head after being pressurized, the reciprocating circulation is carried out, uninterrupted feeding is realized, the molten material is injected into the external mold after being pressurized, the molten material is injected into the mold in a filling manner, and the quality of injection molding products is improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 is a schematic cross-sectional view taken along line a-a of fig. 2 according to the present invention;

fig. 4 is a schematic view of the enlarged structure of a part a in fig. 1 according to the present invention;

in the drawings, the reference numbers: 1. extruding out of the barrel; 2. a reduction motor; 3. a feed hopper; 4. a discharge pipe; 5. an installation table; 6. a first three-way pipe; 7. a second three-way pipe; 8. a first material valve; 9. a second material valve; 10. a third material valve; 11. a fourth material valve; 12. an injection tube; 13. a hydraulic lever; 14. a piston; 15. an injection head; 16. an electric heating wire; 17. a heat-insulating layer; 18. wear-resistant ceramic lining layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the utility model discloses a hot melt injection device for food plastic containers, including spiral extruder, spiral extruder includes extrusion feed cylinder 1, gear motor 2 and spiral extrusion pole, is provided with the cavity in extrusion feed cylinder 1, and the spiral extrusion pole is rotatable to be set up in the cavity, and the output of gear motor 2 is connected with the transmission of spiral extrusion pole, and extrusion feed cylinder 1's top rear portion is provided with feeder hopper 3 with the cavity intercommunication, and extrusion feed cylinder 1's front end is provided with discharging pipe 4 with the cavity intercommunication, and extrusion feed cylinder 1's outer wall cladding has electric heater unit; the device also comprises an installation platform 5, a first pressurizing injection mechanism, a second pressurizing injection mechanism, a first three-way pipe 6, a second three-way pipe 7, a first material valve 8, a second material valve 9, a third material valve 10 and a fourth material valve 11, wherein a spiral extruder is fixedly arranged at the rear part of the top end of the installation platform 5, the first pressurizing injection mechanism and the second pressurizing injection mechanism are respectively and fixedly arranged at the left front part and the right front part of the top end of the installation platform 5, the input end of the first three-way pipe 6 is communicated with the output end of the discharge pipe 4, the first pressurizing injection mechanism and the second pressurizing injection mechanism respectively comprise an injection tube 12, a hydraulic rod 13 and a piston 14, an injection cavity is arranged in the injection tube 12, the piston 14 is matched with the injection cavity, the piston 14 can slide left and right in the injection cavity, the hydraulic rod 13 is fixedly arranged on the installation platform 5, the output end of the hydraulic rod 13 is in transmission connection with the piston 14, the left output end of the first three-way pipe 6 is communicated with the, the first material valve 8 is arranged at the left output end of the first three-way pipe 6, the right output end of the first three-way pipe 6 is communicated with the left part of an injection cavity on the second pressure injection mechanism, the second material valve 9 is arranged at the right output end of the first three-way pipe 6, the left input end of the second three-way pipe 7 is communicated with the right part of the injection cavity on the first pressure injection mechanism, the third material valve 10 is arranged at the left input end of the second three-way pipe 7, the right input end of the second three-way pipe 7 is communicated with the left part of the injection cavity on the second pressure injection mechanism, the fourth material valve 11 is arranged at the right input end of the second three-way pipe 7, and the output end of the second three-way pipe 7 is provided with an injection head 15; an electric heating device is started to preheat an extrusion charging barrel 1, a powdery material is added into a cavity through a feeding hopper 3, a speed reducing motor 2 is started to drive a spiral extrusion rod to rotate, the powdery material is heated into a molten state in the cavity, the spiral extrusion rod extrudes the molten material through a discharging pipe 4, a first material valve 8 is opened, a third material valve 10 is closed, a second material valve 9 and a fourth material valve 11 are both in a closed state, a hydraulic rod 13 on a first pressurizing injection mechanism is started, the output end of the hydraulic rod 13 is shortened, a piston 14 moves left along the injection cavity, negative pressure is formed in the injection cavity on the first pressurizing injection mechanism, the molten material enters the injection cavity, the first material valve 8 is closed, the third material valve 10 is opened, the hydraulic rod 13 on the first pressurizing injection mechanism extends, the piston 14 moves right, the molten material in the injection cavity on the first pressurizing mechanism is pressurized and then is injected into an external mold through an injection head 15, meanwhile, the second material valve 9 is opened, the fourth material valve 11 is in a closed state, the hydraulic rod 13 on the second pressurizing injection mechanism is started, the piston 14 moves rightwards, molten materials enter an injection cavity on the second pressurizing injection mechanism, after the materials are injected into the injection tube 12 on the first pressurizing injection mechanism, the first material valve 8 and the fourth material valve 11 are opened, the second material valve 9 and the third material valve 10 are closed, the hydraulic rod 13 on the second pressurizing injection mechanism is started, the output end of the hydraulic rod 13 extends, the piston 14 moves leftwards, the materials in the injection tube 12 on the second pressurizing injection mechanism are pressurized and then injected into an external mold through the injection head 15, and the steps are repeated in such a way, so that uninterrupted feeding is realized, the molten materials are pressurized and then injected into the external mold, the molten materials are fully injected into the mold, and the quality of injection molding products is improved.

In the hot melting injection device for the food plastic container, the heating wires 16 are spirally wound on the outer walls of the injection tubes 12 on the first pressurizing injection mechanism and the second pressurizing injection mechanism; by arranging the electric heating wire 16, the injection tube 12 on the first pressurizing injection mechanism and the second pressurizing injection mechanism can be heated, so that the temperature in the injection cavity is increased, the material entering the injection cavity can be continuously heated, the material is kept in a better molten state, and the material is prevented from being solidified due to too low temperature; the outer walls of the injection cylinders 12 on the first pressurizing injection mechanism and the second pressurizing injection mechanism are coated with insulating layers 17, and electric heating wires 16 are positioned between the insulating layers 17 and the outer walls of the injection cylinders 12; the heat-insulating layer 17 can be made of polyurethane, and the heat loss in the injection cylinder 12 can be reduced by arranging the heat-insulating layer 17, so that the energy is saved; the injection head 15 is detachably connected with the output end of the second three-way pipe 7 through a bolt; the injection head 15 is detachably connected with the output end of the second three-way pipe 7 through a bolt, so that the injection head 15 can be conveniently disassembled, assembled and replaced; the inner walls of the injection cavities on the first pressurizing injection mechanism and the second pressurizing injection mechanism are both provided with wear-resistant ceramic lining layers 18; through the setting of wear-resisting ceramic inside liner 18, can increase the abrasion resistance of injection chamber inner wall, can increase the smoothness of injection chamber inner wall simultaneously, reduce the frictional force when piston 14 removes about, improve the degree of agreeing with of piston 14 and injection chamber inner wall, improve sealed effect.

When the device is used, the electric heating device is started to preheat the extrusion material barrel 1, a powdery material is added into a cavity through the feed hopper 3, the speed reduction motor 2 is started to drive the spiral extrusion rod to rotate, the powdery material is heated into a molten state in the cavity, the spiral extrusion rod extrudes the molten material through the discharge pipe 4, the first material valve 8 is opened, the third material valve 10 is closed, the second material valve 9 and the fourth material valve 11 are both in a closed state, the hydraulic rod 13 on the first pressurizing injection mechanism is started, the output end of the hydraulic rod 13 is shortened, the piston 14 moves leftwards along the injection cavity, negative pressure is formed in the injection cavity on the first pressurizing injection mechanism, the molten material enters the injection cavity, the first material valve 8 is closed, the third material valve 10 is opened, the hydraulic rod 13 on the first pressurizing injection mechanism is extended, the piston 14 moves rightwards, the molten material in the injection cavity on the first pressurizing mechanism is pressurized and then is injected into an external mold through the injection head 15 after the molten material in the injection cavity is pressurized Meanwhile, the second material valve 9 is opened, the fourth material valve 11 is in a closed state, the hydraulic rod 13 on the second pressure injection mechanism is started, the piston 14 moves rightwards, molten materials enter an injection cavity on the second pressure injection mechanism, after the materials are injected into the injection tube 12 on the first pressure injection mechanism, the first material valve 8 and the fourth material valve 11 are opened, the second material valve 9 and the third material valve 10 are closed, the hydraulic rod 13 on the second pressure injection mechanism is started, the output end of the hydraulic rod 13 extends, the piston 14 moves leftwards, the materials in the injection tube 12 on the second pressure injection mechanism are injected into an external mold through the injection head 15 after being pressurized, and the operation is repeated in such a way, so that uninterrupted feeding is realized, the molten materials are injected into the external mold after being pressurized, the molten materials are injected into the mold in an filling way, and the quality of injection molding products is improved; by arranging the electric heating wire 16, the injection tube 12 on the first pressurizing injection mechanism and the second pressurizing injection mechanism can be heated, so that the temperature in the injection cavity is increased, the material entering the injection cavity can be continuously heated, the material is kept in a better molten state, and the material is prevented from being solidified due to too low temperature; the heat-insulating layer 17 can be made of polyurethane, and the heat loss in the injection cylinder 12 can be reduced by arranging the heat-insulating layer 17, so that the energy is saved; the injection head 15 is detachably connected with the output end of the second three-way pipe 7 through a bolt, so that the injection head 15 can be conveniently disassembled, assembled and replaced; through the setting of wear-resisting ceramic inside liner 18, can increase the abrasion resistance of injection chamber inner wall, can increase the smoothness of injection chamber inner wall simultaneously, reduce the frictional force when piston 14 removes about, improve the degree of agreeing with of piston 14 and injection chamber inner wall, improve sealed effect.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A hot melting injection device for food plastic containers comprises a spiral extruder, wherein the spiral extruder comprises an extrusion barrel (1), a speed reduction motor (2) and a spiral extrusion rod, a cavity is arranged in the extrusion barrel (1), the spiral extrusion rod is rotatably arranged in the cavity, the output end of the speed reduction motor (2) is in transmission connection with the spiral extrusion rod, a feed hopper (3) communicated with the cavity is arranged at the rear part of the top end of the extrusion barrel (1), a discharge pipe (4) communicated with the cavity is arranged at the front end of the extrusion barrel (1), and an electric heating device is wrapped on the outer wall of the extrusion barrel (1); the device is characterized by further comprising an installation platform (5), a first pressurizing injection mechanism, a second pressurizing injection mechanism, a first three-way pipe (6), a second three-way pipe (7), a first material valve (8), a second material valve (9), a third material valve (10) and a fourth material valve (11), wherein the spiral extruder is fixedly arranged at the rear part of the top end of the installation platform (5), the first pressurizing injection mechanism and the second pressurizing injection mechanism are respectively and fixedly arranged at the left front part and the right front part of the top end of the installation platform (5), the input end of the first three-way pipe (6) is communicated with the output end of the discharge pipe (4), the first pressurizing injection mechanism and the second pressurizing injection mechanism respectively comprise an injection cylinder (12), a hydraulic rod (13) and a piston (14), an injection cavity is arranged in the injection cylinder (12), and the piston (14) is matched with the injection cavity, the piston (14) is arranged in the injection cavity in a left-right sliding manner, the hydraulic rod (13) is fixedly arranged on the mounting table (5), the output end of the hydraulic rod (13) is in transmission connection with the piston (14), the left output end of the first three-way pipe (6) is communicated with the right part of the injection cavity on the first pressurizing injection mechanism, the first material valve (8) is arranged at the left output end of the first three-way pipe (6), the right output end of the first three-way pipe (6) is communicated with the left part of the injection cavity on the second pressurizing injection mechanism, the second material valve (9) is arranged at the right output end of the first three-way pipe (6), the left input end of the second three-way pipe (7) is communicated with the right part of the injection cavity on the first pressurizing injection mechanism, and the third material valve (10) is arranged at the left input end of the second three-way pipe (7), the right input end of the second three-way pipe (7) is communicated with the left part of the injection cavity on the second pressurizing injection mechanism, the fourth material valve (11) is arranged at the right input end of the second three-way pipe (7), and the output end of the second three-way pipe (7) is provided with an injection head (15).

2. A hot melt injection apparatus for food plastic containers as claimed in claim 1, wherein the heating wire (16) is spirally wound around the outer wall of the injection cylinder (12) of the first and second pressurized injection mechanisms.

3. A hot-melt injection device for food plastic containers as claimed in claim 2, wherein the outer wall of the injection tube (12) of the first and second pressurized injection mechanisms is covered with an insulating layer (17), and the electric heating wire (16) is located between the insulating layer (17) and the outer wall of the injection tube (12).

4. Hot melt injection device for food plastic containers according to claim 3, characterized in that the injection head (15) is detachably connected to the output end of the second tee (7) by means of bolts.

5. A hot-melting injection device for food plastic containers as in claim 4, characterized in that the inner walls of the injection cavities of the first and second pressurized injection mechanisms are provided with wear-resistant ceramic lining layers (18).

Images