CN115972482B

CN115972482B - Supercharged multi-cavity converging injection molding method for plastic packaging product for cosmetics

Info

Publication number: CN115972482B
Application number: CN202310257304.5A
Authority: CN
Inventors: 郭龙文
Original assignee: Guangdong Xingu Plastic Packaging Co ltd
Current assignee: Guangdong Xingu Plastic Packaging Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-05-23
Anticipated expiration: 2043-03-17
Also published as: CN115972482A

Abstract

The invention relates to a supercharged multi-cavity confluence injection molding method for a plastic packaging product for cosmetics, which comprises the following steps of: step one: pouring the thermoplastic plastic or the thermosetting plastic into melting equipment to melt; step two: a plurality of groups of pump material components are equidistantly arranged on the lower die, each group of pump material components is rotatably provided with an abutting wheel, and the initial distance between each abutting wheel and the lower die is adjusted according to the volume distribution in the cavity; step three: starting the power assembly to drive the triangular piece to transversely reciprocate, wherein the triangular piece is matched with the abutting wheel to inject melted thermoplastic plastics or thermosetting plastics into the cavity; step four: in the process of reverse movement of the triangular piece, the triangular piece is driven to longitudinally displace by the reversing assembly, and meanwhile, the triangular piece drives the cooling mechanism to act so as to cool the thermoplastic plastics or the thermosetting plastics in the cavity; step five: taking out the cooled finished product, and repeating the steps one to five to ensure that the cavity is rapidly filled.

Description

Supercharged multi-cavity converging injection molding method for plastic packaging product for cosmetics

Technical Field

The invention relates to the field of plastic packaging of cosmetics, in particular to a supercharged multi-cavity confluence injection molding method for plastic packaging products for cosmetics.

Background

Injection molding is a method for producing and shaping industrial products. Products are generally molded using rubber and plastic. Injection molding can also be divided into injection molding compression molding and die casting.

In the production field of cosmetics, the plastic packaging shell is produced by adopting an injection molding process, and most of injection molding equipment of the plastic cosmetic shell adopts multi-point injection molding to improve injection molding effect, but in the multi-point injection molding process, the input speed of each injection molding port is constant, the pressure in a mold needs to be measured when judging whether the mold is full of raw materials, and because of irregular space in the mold, the phenomenon that the pressure in each area in the mold is inconsistent exists in the injection molding process, so that the pressure sensor cannot accurately measure the pressure in the mold, the injection amount of the raw materials in the mold cannot be controlled accurately, and the injection molding quality is affected.

Disclosure of Invention

The invention aims to provide a supercharged multi-cavity confluence injection molding method for plastic packaging products for cosmetics, which aims to solve the problems in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a supercharged multi-cavity confluence injection molding method for plastic packaging products for cosmetics comprises the following steps:

step one: pouring thermoplastic or thermosetting plastics for producing cosmetic plastic packaging products into a melting device, and melting the thermoplastic or thermosetting plastics by using the melting device;

step two: a plurality of groups of pump material components are equidistantly arranged on the lower die, the pump material components inject melted thermoplastic plastics or thermosetting plastics into a cavity between the lower die and the upper die, each group of pump material components is rotatably provided with an abutting wheel, and the initial distance between each abutting wheel and the lower die is adjusted according to the volume distribution in the cavity;

step three: starting a power assembly to drive a triangular piece movably connected with the power assembly to transversely reciprocate, wherein the triangular piece is matched with the abutting wheel to inject melted thermoplastic plastics or thermosetting plastics into the cavity, and a plurality of pumping assemblies are mutually matched to enable the cavity to be rapidly filled;

step four: in the process of the reverse movement of the triangular piece, the triangular piece is driven to longitudinally displace through the reversing assembly so as to be misplaced with the abutting wheel, and meanwhile, the triangular piece drives the cooling mechanism to act so as to cool the thermoplastic plastic or the thermosetting plastic in the cavity to be molded;

step five: and taking out the cooled finished product, repeating the steps one to five, and carrying out batch production.

As a further scheme of the invention: the upper die and the lower die are arranged on the box body; the material pumping assembly comprises a storage bin body which is arranged in the box body and is communicated with the lower die, a sealing piston is arranged in the storage bin body in a sealing sliding manner, a connecting rod which penetrates through the storage bin body and extends to the outside is fixed on the sealing piston, a limiting groove is formed in the circumferential outer wall of the connecting rod, and the limiting groove is in sliding fit with a limiting block arranged in the storage bin body; a second spring is sleeved on the connecting rod, one end of the second spring is connected with the storage bin body, and the other end of the second spring is connected with the end part of the connecting rod; the pump assembly further comprises a thread control structure for adjusting the distance between the abutting wheel and the connecting rod.

As still further aspects of the invention: the screw thread control structure is including rotating the installation the connecting rod is kept away from the knob of storage silo body one end, coaxial coupling has the screw thread sleeve in the knob, be provided with the lead screw with its threaded connection in the screw thread sleeve, non-cylindric cavity has been seted up to the inside of lead screw, slide in the non-cylindric cavity be provided with the gag lever post that sealing piston is fixed, just the lead screw is kept away from the one end of storage silo body with the butt wheel rotates to be connected.

As still further aspects of the invention: the power assembly comprises a mounting plate fixedly mounted in the box body, a driving device is fixedly mounted on the mounting plate, two driving wheels are symmetrically arranged on the mounting plate, one driving wheel is connected with the driving device, and a driving belt is sleeved between the two driving wheels; two cross bars are symmetrically arranged on the mounting plate, each cross bar is provided with a guide sliding block in a sliding mode, the two guide sliding blocks are connected through a connecting plate, the connecting plate is provided with a jogging groove along the length direction of the connecting plate, and the sliding blocks rotatably arranged on the driving belt can slide in the jogging groove.

As still further aspects of the invention: the connecting plate is detachably provided with a placing plate, the placing plate is connected with the triangular piece through an energy storage component, and the energy storage component is matched with the reversing component so as to enable the triangular piece to longitudinally displace; the energy storage assembly comprises two transverse shafts arranged on the placing plate, the transverse shafts are in sliding connection with the triangular pieces, a first spring is sleeved on the transverse shafts, one end of the first spring is connected with the transverse shafts, and the other end of the first spring is connected with the triangular pieces.

As still further aspects of the invention: the reversing assembly comprises a guide plate fixedly installed on the mounting plate and a transverse plate fixedly installed on the triangular piece, one end, far away from the triangular piece, of the transverse plate is rotatably provided with a pulley, and the pulley is in rolling fit with a bidirectional groove body arranged on the guide plate.

As still further aspects of the invention: the bidirectional groove body comprises a first horizontal groove, a vertical groove, a second horizontal groove and an inclined groove which are arranged on the guide plate, wherein the first horizontal groove, the vertical groove, the second horizontal groove and the inclined groove are sequentially connected end to end, and an extension groove body is formed at one end, far away from the vertical groove, of the first horizontal groove; the reversing piece is rotatably arranged at the joint of the first horizontal groove and the inclined groove, and the reversing piece is connected with the inclined groove through the elastic piece.

As still further aspects of the invention: the cooling mechanism comprises a liquid pump and a cooling device which are fixedly arranged on the mounting plate, the liquid pump is communicated with the cooling device, and the lower die is communicated with the liquid pump and the cooling device; the cooling mechanism further comprises a transmission component connected with the triangular piece and used for driving the liquid pump to work.

As still further aspects of the invention: the transmission assembly comprises two transmission wheels rotatably arranged on the guide plate, a transmission belt is sleeved between the two transmission wheels, a plurality of protruding blocks are equidistantly arranged on the outer side of the transmission belt, and the protruding blocks are matched with protruding parts fixed on the triangular piece; the rotating shaft of one of the driving wheels is connected with the liquid pump through a belt; and the guide plate is also provided with an abutting plate which is in sliding fit with the transmission belt.

Compared with the prior art, the invention has the beneficial effects that: the pump material component and the power component are arranged, so that the raw materials can be injected into the cavity between the upper die and the lower die at multiple points, the raw material injection time is reduced, the phenomenon that the raw materials are cooled and solidified after being injected into the cavity is avoided, on the other hand, the initial height of the abutting wheel is adjusted according to the volume measurement result of each area in the cavity formed between the upper die and the lower die, so that the injection speed of the raw materials in the area with larger volume in the cavity formed between the upper die and the lower die is increased, the injection speed of the raw materials in the area with smaller volume in the cavity formed between the upper die and the lower die is reduced, the rate of the raw materials injected into the cavity is more consistent, the forming effect is improved, and the solidification probability of the raw materials is further reduced; through the energy storage component and the reversing component, raw materials in the storage bin body can be pumped into a cavity between the upper die and the lower die in the forward movement process of the triangular piece, raw materials are injected, the raw materials are misplaced with the abutting wheel when the triangular piece moves reversely, the raw materials are prevented from being conveyed into the cavity between the upper die and the lower die again in the reverse movement process of the triangular piece, the excessive pressure in the cavity is caused, the tightness between the upper die and the lower die and between the sealing piston and the storage bin body is reduced, meanwhile, the cooling mechanism can be driven to act when the triangular piece moves reversely, the raw materials are cooled, the continuity in production is improved, compared with the existing injection molding equipment, a cooling device is required to be started manually after the injection is completed, the invention greatly shortens the gear break caused by manual operation, and improves the production speed; through the cooling mechanism that sets up for at triangle in-process that resets, the mould cools off, makes the injection molding faster shaping and better with last mould and bed die separation.

Drawings

FIG. 1 is a schematic view of a structure of an embodiment of a pressurized multi-cavity coinjection molding method for a plastic packaging article for cosmetics;

FIG. 2 is a schematic view showing a partial structure in a case according to an embodiment of a pressurized multi-cavity coinjection molding method for a plastic packaging product for cosmetics;

FIG. 3 is a schematic view of the structure of a case in an embodiment of a pressurized multi-cavity coinjection method for cosmetic plastic packaging;

FIG. 4 is a schematic view of another angle in a case of an embodiment of a pressurized multi-cavity coinjection method for cosmetic plastic packaging;

FIG. 5 is a schematic view of a pump assembly in one embodiment of a pressurized multi-cavity coinjection molding process for cosmetic plastic packaging articles;

FIG. 6 is an exploded view of a pump assembly in one embodiment of a pressurized multi-cavity coinjection molding process for cosmetic plastic packaging articles;

FIG. 7 is a schematic view of the power assembly and reversing assembly of one embodiment of a pressurized multi-cavity coinjection molding process for cosmetic plastic packaging articles;

FIG. 8 is a schematic view of the structure of a reversing assembly in one embodiment of a pressurized multi-cavity coinjection method for cosmetic plastic packaging articles;

FIG. 9 is an enlarged schematic view of the structure at A in FIG. 8;

fig. 10 is a schematic view showing a structure of a cooling mechanism in one embodiment of a supercharged multi-cavity coinjection molding method for a plastic packaging product for cosmetics.

In the figure: 1. a case; 2. a mounting plate; 3. a driving device; 4. a driving wheel; 5. a drive belt; 6. a slide block; 7. a cross bar; 8. a guide slide block; 9. a yoke plate; 10. a fitting groove; 11. placing a plate; 12. triangular pieces; 13. a horizontal axis; 14. a first spring; 15. a cross plate; 16. a pulley; 17. a guide plate; 18. a reversing sheet; 19. a bidirectional groove body; 20. an abutment wheel; 21. a screw rod; 22. a threaded sleeve; 23. a knob; 24. a connecting rod; 25. a limit rod; 26. a second spring; 27. a storage bin body; 28. a sealing piston; 29. a protruding portion; 30. a transmission belt; 31. an abutting plate; 32. a driving wheel; 33. a belt; 34. a liquid pump; 35. and a cooling device.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In addition, an element in the present disclosure may be referred to as being "fixed" or "disposed" on another element or being directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In the embodiment of the invention, a supercharged multi-cavity confluence injection molding method for a plastic packaging product for cosmetics comprises the following steps:

step two: a plurality of groups of pump material components are equidistantly arranged on the lower die, the pump material components inject melted thermoplastic plastics or thermosetting plastics into a cavity between the lower die and the upper die, each group of pump material components is rotatably provided with an abutting wheel 20, and the initial distance between each abutting wheel 20 and the lower die is adjusted according to the volume distribution in the cavity;

step three: starting a power assembly to drive a triangular piece 12 movably connected with the power assembly to transversely reciprocate, wherein the triangular piece 12 is matched with the abutting wheel 20 to inject melted thermoplastic plastics or thermosetting plastics into the cavity, and a plurality of pumping assemblies are mutually matched to enable the cavity to be rapidly filled;

step four: during the reverse movement of the triangular piece 12, the triangular piece 12 is driven to longitudinally displace by the reversing component so as to be misplaced with the abutting wheel 20, and meanwhile, the triangular piece 12 drives the cooling mechanism to act so as to cool the thermoplastic plastic or the thermosetting plastic in the cavity for molding;

Referring to fig. 1 to 10, the upper mold and the lower mold are installed on the case 1; the pump assembly comprises a storage bin body 27 which is arranged in the box body 1 and is communicated with the lower die, a sealing piston 28 is arranged in the storage bin body 27 in a sealing sliding manner, a connecting rod 24 which penetrates through the storage bin body 27 and extends to the outside is fixed on the sealing piston 28, a limit groove is formed in the circumferential outer wall of the connecting rod 24, and the limit groove is in sliding fit with a limit block arranged in the storage bin body 27; the connecting rod 24 is also sleeved with a second spring 26, one end of the second spring 26 is connected with the storage bin 27, and the other end of the second spring 26 is connected with the end part of the connecting rod 24; the pump assembly further comprises a thread control structure for adjusting the distance between the abutting wheel 20 and the connecting rod 24, the thread control structure comprises a knob 23 rotatably installed at one end, far away from the storage bin body 27, of the connecting rod 24, a thread sleeve 22 is coaxially connected in the knob 23, a screw rod 21 in threaded connection with the thread sleeve 22 is arranged in the thread sleeve 22, a non-cylindrical cavity is formed in the screw rod 21, a limiting rod 25 fixed with the sealing piston 28 is slidably arranged in the non-cylindrical cavity, and one end, far away from the storage bin body 27, of the screw rod 21 is rotatably connected with the abutting wheel 20; the power assembly comprises a mounting plate 2 fixedly mounted in the box body 1, a driving device 3 is fixedly mounted on the mounting plate 2, two driving wheels 4 are symmetrically arranged on the mounting plate 2, one driving wheel 4 is connected with the driving device 3, and a driving belt 5 is sleeved between the two driving wheels 4; two cross bars 7 are symmetrically arranged on the mounting plate 2, each cross bar 7 is provided with a guide slide block 8 in a sliding manner, the two guide slide blocks 8 are connected through a connecting plate 9, the connecting plate 9 is provided with a jogging groove 10 along the length direction, and the slide blocks 6 rotatably arranged on the driving belt 5 can slide in the jogging groove 10.

When in use, the storage bin 27 is connected with melting equipment through a guide pipe, the driving device 3 is controlled to work at the time of working, the output shaft of the driving device 3 drives one of the driving wheels 4 to rotate, so that the driving belt 5 sleeved between the two driving wheels 4 acts to drive the sliding block 6 to move, the sliding block 6 is slidably connected with the embedded groove 10 on the connecting plate 9, the driving belt 5 can be regarded as being composed of two straight line sections and two circumference sections, when the sliding block 6 moves in the straight line sections, the connecting plate 9 drives the triangular piece 12 to do linear motion and simultaneously reversely move, so that the triangular piece 12 is driven to do reciprocating motion, and when the triangular piece 12 does linear motion, the connecting rod 21 is driven to move upwards through the connecting rod 24, so that the sealing piston 28 is jacked upwards, the raw material in the storage bin 27 is extruded into a cavity between an upper die and a lower die, after the triangular piece 12 and the second spring 26 are separated, the raw material is injected into the cavity between the storage bin 27 and the lower die, and the storage bin 27 can be cooled, and the negative pressure is prevented from being injected into the cavity after the storage bin 27 is cooled, and the raw material is injected into the cavity is cooled.

Specifically, the storage bin 27 is connected with the lower die and the melting device through two check valves, and the conduction direction of one check valve is: from the storage bin body 27 to the lower die, the conduction direction of the other one-way valve is: the melting equipment is arranged in the storage bin 27, in the embodiment, the sealing piston 28 is jacked upwards, the second spring 26 is compressed, and meanwhile, raw materials in the storage bin 27 are extruded into a cavity between the upper die and the lower die, so that a supercharged injection molding mode is realized, and injection molding time is shortened.

Further, since the shape of the cavity formed between the upper mold and the lower mold is irregular, that is, the volumes of the areas are different, at this time, the initial height of the abutment wheel 20 is adjusted by measuring the volumes of the areas, specifically, the initial height of the abutment wheel 20 corresponding to the area with a large volume is lower, so that the amount of the raw materials extruded in each storage bin 27 is different in the process that the triangular piece 12 drives the abutment wheel 20 to move upwards, so that the cavity is rapidly filled in the same time, the raw material injection time is reduced, specifically, the screw rod 21 in threaded connection with the screw sleeve 22 is driven to rotate by rotating the knob 23, and moves away from or close to the sealing piston 28 under the limiting action of the limiting rod 25 when the screw sleeve 22 rotates.

Through the arrangement, the raw materials can be injected into the cavity between the upper die and the lower die at multiple points, the injection time of the raw materials is reduced, the phenomenon that the raw materials are cooled and solidified after being injected into the cavity is avoided, on the other hand, the initial height of the abutting wheel 20 is adjusted according to the volume measurement result of each area in the cavity formed between the upper die and the lower die, so that the injection speed of the raw materials in the area with larger volume in the cavity formed between the upper die and the lower die is increased, the injection speed of the raw materials in the area with smaller volume in the cavity formed between the upper die and the lower die is reduced, the speed of the raw materials in the cavity is more consistent, the forming effect is improved, and the solidification probability of the raw materials is further reduced.

Wherein, the outer surface of the storage bin body 27 is sleeved with a heating and heat-preserving device to prevent the phenomenon of cooling and solidification after the raw materials in a molten state enter the storage bin body 27.

Referring to fig. 5, 7, 8 and 9, a placement plate 11 is detachably mounted on the connection plate 9, the placement plate 11 is connected with the triangle 12 through an energy storage component, and the energy storage component is matched with the reversing component so as to enable the triangle 12 to longitudinally displace; the energy storage assembly comprises two transverse shafts 13 arranged on the placement plate 11, the transverse shafts 13 are in sliding connection with the triangular pieces 12, a first spring 14 is sleeved on the transverse shafts 13, one end of the first spring 14 is connected with the transverse shafts 13, and the other end of the first spring 14 is connected with the triangular pieces 12; the reversing assembly comprises a guide plate 17 fixedly installed on the mounting plate 2 and a transverse plate 15 fixedly installed on the triangular piece 12, a pulley 16 is rotatably installed at one end, far away from the triangular piece 12, of the transverse plate 15, the pulley 16 is in rolling fit with a bidirectional groove body 19 arranged on the guide plate 17, the bidirectional groove body 19 comprises a first horizontal groove, a vertical groove, a second horizontal groove and an inclined groove which are arranged on the guide plate 17, the first horizontal groove, the vertical groove, the second horizontal groove and the inclined groove are sequentially connected end to end, and an extending groove body is formed at one end, far away from the vertical groove, of the first horizontal groove; the commutator segments 18 are rotatably arranged at the joint of the first horizontal groove and the inclined groove, and the commutator segments 18 are connected with the inclined groove through elastic pieces.

When the triangle 12 moves to inject the raw material in the storage bin 27 between the upper die and the lower die, the spring 14 is in a stretched state, the projection of the triangle 12 is coincided with the projection of the abutting wheel 20, the pulley 16 moves in the extending groove on the first horizontal groove, when the triangle 12 moves to the stroke end, the pulley 16 moves to the end of the first horizontal groove, the spring 14 releases elastic potential energy, the pulley 16 is pulled to move along the vertical groove, the cooling mechanism is triggered after the pulley 16 moves to the stroke end of the vertical groove, and when the triangle 12 moves reversely, the cooling mechanism is driven to act to cool the raw material between the upper die and the lower die to be molded, in the process, the pulley 16 moves in the second horizontal groove, and when the triangle 12 is about to reset, the pulley 16 moves into the inclined groove, under the guiding action of the inclined groove, the triangle 12 moves longitudinally, the projection of the triangle 12 is coincided with the projection of the abutting wheel 20 again, and then the triangle 12 moves to the extending groove completely reset, so that the reset of the triangle 16 is realized.

Through the arrangement, raw materials in the storage bin body 27 can be pumped into a cavity between the upper die and the lower die in the forward movement process of the triangular piece 12, raw materials are injected, the raw materials are misplaced with the abutting wheels 20 when the triangular piece 12 moves reversely, the raw materials are prevented from being conveyed into the cavity between the upper die and the lower die again in the reverse movement process of the triangular piece 12, the excessive pressure in the cavity is caused, the tightness between the upper die and the lower die and between the sealing piston 28 and the storage bin body 27 is reduced, meanwhile, the triangular piece 12 can drive the cooling mechanism to act when moving reversely, the raw materials are cooled, the continuity in production is improved, compared with the existing injection molding equipment, the cooling device 35 is required to be started manually after the injection is completed, the invention greatly shortens the manual operation-induced gear break and improves the production speed.

It should be noted that, when the pulley 16 moves from the inclined groove toward the first horizontal groove, the pulley 16 will abut against the reversing piece 18 and drive the reversing piece 18 to deflect, so that the elastic piece deforms, and after the pulley 16 is separated from the reversing piece 18, the elastic piece drives the reversing piece 18 to reset, so that when the pulley 16 follows the triangular piece 12 to move forward, the pulley will not enter into the second horizontal groove from the inclined groove.

Referring to fig. 4 and 10, the cooling mechanism includes a liquid pump 34 and a cooling device 35 fixedly mounted on the mounting plate 2, the liquid pump 34 is communicated with the cooling device 35, and the lower mold is communicated with the liquid pump 34 and the cooling device 35; the cooling mechanism further comprises a transmission assembly connected with the triangular piece 12 and used for driving the liquid pump 34 to work, the transmission assembly comprises two transmission wheels 32 rotatably arranged on the guide plate 17, a transmission belt 30 is sleeved between the two transmission wheels 32, a plurality of protruding blocks are equidistantly arranged on the outer side of the transmission belt 30, and the protruding blocks are matched with the protruding parts 29 fixed on the triangular piece 12; the rotating shaft of one driving wheel 32 is connected with the liquid pump 34 through a belt 33; the guide plate 17 is further provided with an abutting plate 31 slidably abutting against the belt 30.

After the pulley 16 moves to the end of the first horizontal groove, the first spring 14 releases elastic potential energy to drive the pulley 16 to move from the vertical groove to the second horizontal groove, the triangular piece 12 finishes longitudinal displacement and drives the protruding part 29 to move between two adjacent protruding blocks, and in the resetting process of the triangular piece 12, the driving belt 30 is driven to move, so that the driving wheel 32 rotates, the liquid pump 34 is driven to work through the belt 33, the cooling liquid in the cooling device 35 is pumped into the lower die, the die between the lower die and the upper die is cooled, and then the cooling liquid flows back into the cooling device 35.

Through the arrangement, the mold is cooled in the resetting process of the triangular piece 12, so that the injection molding product is molded faster and separated from the upper mold and the lower mold better.

It should be noted that, the abutting plate 31 is mainly configured to prevent the protrusion 29 from being separated from the protrusion 29 due to deformation of the driving belt 30 when the protrusion 29 is located between two protrusions to drive the protrusions to move, and to reduce abrasion of the driving belt 30, lubricating oil may be periodically applied between the driving belt 30 and the abutting plate 31 or multiple sets of rollers may be disposed on the surface of the abutting plate 31.

In summary, when in use, the storage bin 27 is connected with the melting device through the guide pipe, the driving device 3 is controlled to work, the output shaft of the driving device 3 drives one of the driving wheels 4 to rotate when in work, so that the driving belt 5 sleeved between the two driving wheels 4 acts to drive the sliding block 6 to move, the sliding block 6 is slidably connected with the embedded groove 10 on the connecting plate 9, and the driving belt 5 can be regarded as being composed of two straight line sections and two circumferential sections, so that when the sliding block 6 moves in the straight line sections, the connecting plate 9 drives the triangular piece 12 to do linear movement, and when the sliding block 6 moves in the circumferential sections, the connecting plate 9 drives the triangular piece 12 to do linear movement and simultaneously reverse movement, so as to drive the triangular piece 12 to do reciprocating movement, and when the triangular piece 12 does linear movement, the connecting rod 20 is abutted, and the connecting rod 24 is driven to move upwards through the screw rod 21 to jack up the sealing piston 28, the raw material in the storage bin 27 is extruded into the cavity between the upper die and the lower die while the triangular piece 12 is compressed by the spring 26, and then the triangular piece 12 is separated from the triangular piece 20 to the elastic piece 26, and the negative pressure is pumped into the storage bin 27, so that the raw material is discharged into the melting device.

The initial height of the abutting wheel 20 is adjusted by measuring the volume of each region due to the irregular shape of the cavity formed between the upper die and the lower die, namely the volume difference of each region, so that the cavity is rapidly filled under the same time due to the different amount of the raw materials extruded in the storage bin 27 in the process of driving the abutting wheel 20 to move upwards by the triangular piece 12, the raw material injection time is shortened, and particularly, the threaded sleeve 22 connected with the threaded sleeve 22 is driven to rotate by rotating the knob 23, and the screw rod 21 in threaded connection with the threaded sleeve 22 moves away from or close to the sealing piston 28 under the limiting action of the limiting rod 25 when the threaded sleeve 22 rotates.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A supercharged multi-cavity confluence injection molding method for a plastic packaging product for cosmetics is characterized by comprising the following steps of:

step two: a plurality of groups of pump material components are equidistantly arranged on the lower die, the pump material components can inject melted thermoplastic plastics or thermosetting plastics into a cavity between the lower die and the upper die, each group of pump material components is rotatably provided with an abutting wheel (20), and the initial distance between each abutting wheel (20) and the lower die is adjusted according to the volume distribution in the cavity;

step three: starting a power assembly to drive a triangular piece (12) movably connected with the power assembly to transversely reciprocate, wherein the triangular piece (12) is matched with the abutting wheel (20) to inject melted thermoplastic plastics or thermosetting plastics into the cavity, and a plurality of pumping assemblies are mutually matched to enable the cavity to be rapidly filled;

step four: in the process of reversing movement of the triangular piece (12), driving the triangular piece (12) to longitudinally displace through a reversing assembly so as to be misplaced with the abutting wheel (20), and simultaneously driving a cooling mechanism to act by the triangular piece (12) to cool and shape thermoplastic plastics or thermosetting plastics in the cavity;

step five: taking out the cooled finished product, repeating the steps one to five, and carrying out batch production;

the upper die and the lower die are arranged on the box body (1);

the material pumping assembly comprises a storage bin body (27) which is arranged in the box body (1) and is communicated with the lower die, a sealing piston (28) is arranged in the storage bin body (27) in a sealing sliding manner, a connecting rod (24) which penetrates through the storage bin body (27) and extends to the outside is fixed on the sealing piston (28), a limiting groove is formed in the circumferential outer wall of the connecting rod (24), and the limiting groove is in sliding fit with a limiting block arranged in the storage bin body (27);

a second spring (26) is sleeved on the connecting rod (24), one end of the second spring (26) is connected with the storage bin body (27), and the other end of the second spring (26) is connected with the end part of the connecting rod (24);

the pump assembly further comprises a screw thread control structure for adjusting the distance between the abutment wheel (20) and the connecting rod (24);

the power assembly comprises a mounting plate (2) fixedly mounted in the box body (1), a driving device (3) is fixedly mounted on the mounting plate (2), two driving wheels (4) are symmetrically arranged on the mounting plate (2), one driving wheel (4) is connected with the driving device (3), and a driving belt (5) is sleeved between the two driving wheels (4);

two cross bars (7) are symmetrically arranged on the mounting plate (2), each cross bar (7) is provided with a guide sliding block (8) in a sliding manner, the two guide sliding blocks (8) are connected through a connecting plate (9), the connecting plate (9) is provided with a jogging groove (10) along the length direction, and a sliding block (6) rotatably arranged on the driving belt (5) can slide in the jogging groove (10);

the connecting plate (9) is detachably provided with a placing plate (11), the placing plate (11) is connected with the triangular piece (12) through an energy storage component, and the energy storage component is matched with the reversing component so as to enable the triangular piece (12) to longitudinally displace;

the energy storage assembly comprises two transverse shafts (13) arranged on the placement plate (11), the transverse shafts (13) are in sliding connection with the triangular pieces (12), a first spring (14) is sleeved on each transverse shaft (13), one end of each first spring (14) is connected with the corresponding transverse shaft (13), and the other end of each first spring (14) is connected with each triangular piece (12);

the reversing assembly comprises a guide plate (17) fixedly arranged on the mounting plate (2) and a transverse plate (15) fixedly arranged on the triangular piece (12), one end, far away from the triangular piece (12), of the transverse plate (15) is rotatably provided with a pulley (16), and the pulley (16) is in rolling fit with a bidirectional groove body (19) arranged on the guide plate (17);

the bidirectional groove body (19) comprises a first horizontal groove, a vertical groove, a second horizontal groove and an inclined groove which are arranged on the guide plate (17), the first horizontal groove, the vertical groove, the second horizontal groove and the inclined groove are connected end to end in sequence, and an extension groove body is formed at one end of the first horizontal groove far away from the vertical groove;

the reversing piece (18) is rotatably arranged at the joint of the first horizontal groove and the inclined groove, and the reversing piece (18) is connected with the inclined groove through an elastic piece.

2. The supercharged multi-cavity confluence injection molding method for plastic packaging products for cosmetics according to claim 1, wherein the thread control structure comprises a knob (23) rotatably installed at one end of a connecting rod (24) far away from a storage bin body (27), a thread sleeve (22) is coaxially connected in the knob (23), a screw rod (21) in threaded connection with the thread sleeve is arranged in the thread sleeve (22), a non-cylindrical cavity is formed in the screw rod (21), a limiting rod (25) fixed with a sealing piston (28) is slidably arranged in the non-cylindrical cavity, and one end of the screw rod (21) far away from the storage bin body (27) is rotatably connected with the abutting wheel (20).

3. The supercharged multi-cavity confluence injection molding method for plastic packaging products for cosmetics according to claim 1, wherein the cooling mechanism comprises a liquid pump (34) fixedly mounted on the mounting plate (2) and a cooling device (35), the liquid pump (34) is communicated with the cooling device (35), and the lower die is communicated with the liquid pump (34) and the cooling device (35);

the cooling mechanism further comprises a transmission assembly connected with the triangle (12) and used for driving the liquid pump (34) to work.

4. A method of supercharged multi-cavity converging injection molding of plastic packaging products for cosmetics according to claim 3, characterized in that the transmission assembly comprises two transmission wheels (32) rotatably mounted on the guide plate (17), a transmission belt (30) is sleeved between the two transmission wheels (32), a plurality of protruding blocks are equidistantly arranged on the outer side of the transmission belt (30), and the protruding blocks are matched with protruding parts (29) fixed on the triangular piece (12);

the rotating shaft of one driving wheel (32) is connected with the liquid pump (34) through a belt (33);

and an abutting plate (31) which is in sliding fit with the transmission belt (30) is further arranged on the guide plate (17).