CN109605693B

CN109605693B - Servo energy-saving hydraulic injection molding machine and hydraulic control system thereof

Info

Publication number: CN109605693B
Application number: CN201811357537.8A
Authority: CN
Inventors: 王海石
Original assignee: Zhongshan Haiteng Machinery Co ltd
Current assignee: Zhongshan Haiteng Machinery Co ltd
Priority date: 2018-11-15
Filing date: 2018-11-15
Publication date: 2020-10-27
Anticipated expiration: 2038-11-15
Also published as: CN109605693A

Abstract

The invention belongs to the field of injection molding machines, and particularly relates to a servo energy-saving hydraulic injection molding machine and a hydraulic control system thereof, which comprise a plastic injection cylinder, a limit switch, a servo motor, a speed reducer, a heater and a telescopic mechanism; the cleaning device also comprises a cleaning unit and a hydraulic cylinder. On one hand, the cleaning unit, the heater, the permanent magnet, the electrified coil and the hydraulic cylinder are matched with each other, so that the powder adhered to the plastic injection cylinder is changed into a molten state, and then the molten state powder is scraped from the side wall of the plastic injection cylinder through the lantern-shaped cleaning unit, so that the powder is prevented from being accumulated on the plastic injection cylinder, the flowability of the molten powder in the plastic injection cylinder is improved, and the stability of powder injection molding work is improved; on the other hand, the expansion and contraction of the hydraulic cylinder are controlled through the temperature of the hydraulic oil, so that the energy source in injection molding is reused, and the energy saving performance of the injection molding machine is improved.

Description

Servo energy-saving hydraulic injection molding machine and hydraulic control system thereof

Technical Field

The invention belongs to the field of injection molding machines, and particularly relates to a servo energy-saving hydraulic injection molding machine and a hydraulic control system thereof.

Background

The injection molding machine is a processing machine with the largest use amount in the plastic processing industry, and not only a large number of products can be directly produced by the injection molding machine, but also key equipment for forming an injection stretch blow process is formed. The injection molding machine pushes the molten raw material into a nozzle by a plunger or a screw, and injects the molten raw material into a mold to form a plastic part.

The injection molding machines in China are about millions of machines, and the injection molding machines are used for manufacturing engineering plastic products with different purposes by replacing various types of molds. When products with different colors are injected, the common method is to firstly inject plastic products with light colors, and after one batch of plastic products is finished, even if plastic particles with light colors are remained in an injection cylinder, the powder with dark colors in the next batch can be mixed together to be changed into dark colors after being poured, and further, the cleaning is not needed. Although the cleaning can be avoided, in the production process, due to different material powder proportions after the material powder is mixed, the plastic part is extruded after being mixed, cooled and opened, the color of the plastic part reaches low scale, and the strength of the plastic part is changed to a certain extent.

The technical scheme that a patent relates to a servo energy-saving hydraulic injection molding machine and a hydraulic control system thereof also appears in the prior art, for example, a Chinese patent with application number 2015109865976 discloses an injection molding machine, which comprises a plastic injection cylinder, wherein a screw rod is arranged in the plastic injection cylinder, an external thread is arranged on the screw rod, a cleaning device is arranged at the bottom of the plastic injection cylinder, an internal thread is arranged on an inner ring of the cleaning device, an outer ring of the cleaning device is in clearance fit with the inner ring of the plastic injection cylinder, a telescopic mechanism is arranged on the screw rod, when the screw rod retracts backwards to the lowest part, the external thread is matched with the internal thread of the cleaning device, and a heating coil is arranged in the cleaning device.

This technical scheme's an injection molding machine can clear up the material powder of feed cylinder adhesion. However, in the technical scheme, the gaps among the screws are large, and the molten material powder is adhered among the gaps of the rotating rods, so that the screws are inconvenient to clean; meanwhile, the powder adhered to the side wall of the plastic injection cylinder is not easy to clean, and accumulation is caused in the long term, so that the stability of injection molding work is influenced; so that the technical solution is limited.

Disclosure of Invention

The invention provides a servo energy-saving hydraulic injection molding machine and a hydraulic control system thereof, aiming at making up for the defects of the prior art and solving the problems that the screw clearance is too large and the powder adhered to the side wall of an injection molding material cylinder is not easy to clean.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a servo energy-saving hydraulic injection molding machine which comprises an injection plastic cylinder, a limit switch, a servo motor, a speed reducer, a heater and a telescopic mechanism, wherein the injection plastic cylinder is provided with a plastic cylinder body; the cleaning device also comprises a cleaning unit and a hydraulic cylinder; the plastic injection cylinder is provided with a feeding cylinder and a nozzle, and a rotating rod and an electrified coil are arranged in the plastic injection cylinder; the limit switch is arranged at the front end of the plastic injection cylinder and is used for enabling the servo motor to rotate reversely; the rotating rod is provided with convex teeth; the cleaning unit is arranged at the bottom of the plastic injection cylinder, teeth meshed with the convex teeth are arranged on the inner ring of the cleaning unit, a heating coil is arranged in the cleaning unit, the section of the cleaning unit is in a lantern shape, and permanent magnets are arranged at two ends of the cleaning unit; the permanent magnet is matched with the electrified coil; the inner wall of the plastic injection cylinder is also in a lantern shape; the outer ring of the cleaning unit is in clearance fit with the inner ring of the plastic injection cylinder; the telescopic mechanism is arranged at the bottom of the rotating rod and comprises a baffle plate; guide rods penetrate through two ends of the baffle plate, and a narrow part on the rotating rod penetrates through the center of the baffle plate; the bottom of the rotating rod is connected with a hydraulic cylinder; the telescopic mechanism is also connected with a speed reducer and a servo motor; the hydraulic cylinder comprises a shell cover, a first shell, a second shell, a third shell and an expansion bag; the second shell and the third shell are both made of aluminum alloy materials, the aluminum alloy materials accelerate heat conduction, the second shell is positioned on the inner side of the first shell, the second shell is positioned on the outer side of the third shell, a first area is formed between the first shell and the second shell, and the second shell and the third shell form a second area; the shell cover is connected with the first shell, and a radiator is arranged in the middle of the shell cover; the radiator is communicated with the first area through a pipeline, and the radiator is communicated with the second area through a channel; a first disc is sleeved on the outer ring of the second shell; a second disc is arranged inside the third shell; the second disc and the first disc are made of magnetic materials, and the first disc and the second disc are mutually attracted; the expansion bag is located in the second area, the expansion bag is installed on the side walls of the second shell and the third shell through plates, the sections of the inner side wall and the outer side wall of the expansion bag are surrounded by waves and are arranged into the waves, the contact area is increased, heat conduction is accelerated, the section shapes of the inner wall of the second shell and the outer wall of the third shell are matched with the section shapes of the expansion bag, ethanol is arranged inside the expansion bag, and the expansion bag is matched with the expansion of the first shell through the thermal expansion of the ethanol. Injection molding machines are the most used machines in the plastics processing industry; the existing injection molding machine pushes the molten raw materials to a nozzle through a plunger or a rotating rod and injects the molten raw materials into a mold to form a plastic part, but the existing injection molding machine has the defects that on one hand, the gap between the rotating rods is large, and the molten raw materials are adhered to the gap between the rotating rods, so that the rotating rods are inconvenient to clean; on the other hand, the powder adhered to the side wall of the plastic injection cylinder is not easy to clean, and accumulation phenomenon is caused in time, so that the fluidity of the molten material in the plastic injection cylinder is reduced, and the stability of injection molding work is influenced; according to the invention, the plastic injection cylinder, the servo motor, the speed reducer, the heater, the limit switch, the telescopic mechanism, the cleaning unit and the hydraulic cylinder are arranged, on one hand, the cleaning unit, the heater, the permanent magnet, the electrified coil and the hydraulic cylinder are mutually matched, so that the powder adhered to the plastic injection cylinder is changed into a molten state, and then the cage-shaped cleaning unit is used for scraping the molten powder from the side wall of the plastic injection cylinder, so that the powder is prevented from being accumulated on the plastic injection cylinder, the fluidity of the molten powder in the plastic injection cylinder is improved, and the stability of the powder injection molding work is further improved; on the other hand, the expansion and contraction of the hydraulic cylinder are controlled through the temperature of the hydraulic oil, so that the energy source in injection molding is reused, and the energy saving performance of the injection molding machine is improved.

Firstly, feeding powder into a plastic injection cylinder from a feeding cylinder, and conveying the powder fed into the plastic injection cylinder forwards along a rotating rod along with the rotation of the rotating rod; meanwhile, the temperature is gradually increased by the heating of the heater and the shearing friction heat of the rotating rod until certain pressure is generated after the molten plastic is in a viscous flow state; when the pressure at the head of the rotating rod reaches the resistance capable of overcoming the backward movement of the first shell in the hydraulic cylinder, the rotating rod gradually retreats while rotating, so that molten plastic is injected into a mold cavity from a nozzle; after the same batch of powder is used up, when another mould is replaced, the middle of the mould is kept still for a period of time, the inner side of the injection molding material cylinder is adhered by the powder and is difficult to clean, the telescopic mechanism is opened at the moment, a chute is arranged on the narrow-shrinkage part of a rotating rod of the telescopic mechanism, and the hydraulic cylinder is driven at the moment; when hydraulic oil is conveyed to the hydraulic cylinder, the hydraulic oil is firstly radiated through the radiator, the hydraulic oil is conveyed to the first area, the first disc is extruded by the hydraulic oil, the first disc moves to one side far away from the shell cover, meanwhile, the second disc moves to one side far away from the shell cover due to mutual attraction of the first disc and the second disc, gas generated in the movement of the second disc is conveyed to the first shell, and the first shell is matched with the second shell to move to one side far away from the shell cover; because the temperature of the hydraulic oil entering the first area is higher, the temperature is transmitted to the expansion bag through the second shell, the ethanol is heated and expanded to push the plate on the expansion bag, and meanwhile, the gas generated in the pushing process is blown to the radiator to assist the radiator in radiating the hydraulic oil; the narrowing part slides backwards under the driving of the hydraulic cylinder until the shoulder part of the rotating rod is close to the top of the injection molding material cylinder, the rotating rod is contracted to the end, the rotating rod is provided with a convex tooth at a certain distance, the convex tooth is not arranged at a certain distance behind the rotating rod, the backward contraction distance of the telescopic mechanism is the same as the distance between the convex tooth of the rotating rod and the cleaning unit, and therefore the rotating rod is meshed with the cleaning unit; at the moment, the servo motor starts to work to drive the rotating rod to rotate, after the rotating rod is matched with the cleaning unit, the telescopic mechanism returns to the original state, the rotating rod rotates forwards, the rotating rod rotating forwards is matched with teeth on the cleaning unit, and because the cleaning unit and the inner wall section of the injection molding material cylinder are in lantern shapes, resistance exists between the cleaning unit and the cleaning unit, the cleaning unit pushes the powder inside the injection molding material cylinder forwards, and the heating coil heats the powder while pushing the cooled and solidified material powder forwards; touch limit switch when the foremost end of dwang is reachd to the clearance unit, control servo motor begins the reversal, drives the dwang reversal, and the clearance unit resets backward, and limit switch controls telescopic machanism simultaneously and contracts backward, and after the clearance unit got back to initial position, the permanent magnet of both ends setting was adsorbed by the magnetic force after the circular telegram coil circular telegram of notes plastic cylinder.

Preferably, the diameter of the rotating rod is gradually increased from left to right, so that the molten material powder can flow to the left side of the rotating rod from the right side of the rotating rod. The existing rod is a straight rod, and molten material powder is not easy to flow from the right side of the rod to the left side of the rod, so that the flowability is influenced; according to the invention, the diameter of the rotating rod is gradually increased from left to right, so that the molten material powder quickly flows from the right side of the rotating rod to the left side of the rotating rod in the injection molding process of the material powder; meanwhile, in the cleaning of the side wall of the injection molding material cylinder, the molten material powder cleaned by the cleaning unit and the convex teeth in a matched mode falls onto the rotating rod and flows to the nozzle, and therefore the cleaning efficiency of the rotating rod for treating the material powder is improved.

Preferably, the convex teeth consist of an electric heating wire and an iron sheet; the electric heating wire is wrapped by the iron sheet, the temperature of the iron sheet is increased through heating of the electric heating wire, and the material powder which is cooled and solidified in the injection molding charging barrel is changed into a molten state. The convex teeth consist of the electric heating wires and the iron sheets, the electric heating wires, the iron sheets and the electric heating coils are matched with one another, the electric heating wires and the electric heating coils are cooperatively heated inside and outside, the material powder which is cooled and solidified is accelerated to be changed into a molten state, and meanwhile, the iron sheets scrape the material powder adhered to the side wall of the plastic injection cylinder during the rotation of the rotating rod, so that the cleaning efficiency of the plastic injection cylinder is improved.

Preferably, the rotating rod is provided with an auxiliary unit; the auxiliary unit is used for accelerating the molten material powder to enter the nozzle and comprises a swing rod, a fixed rod and a first control box; a first cavity and a first groove are formed in the rotating rod; a push plate is arranged in the first cavity, mercury is arranged on the right side of the push plate, and the push plate is pushed to slide through the thermal expansion of the mercury; one end of the first control box is communicated with the first cavity through a first pipeline, the other end of the first control box is communicated with the first groove through a second pipeline, a hydraulic control one-way valve is arranged at the second pipeline, and the first control box is used for controlling the air pressure amount transmitted to the first groove from the first cavity; the number of the swing rods is two, one ends of the two swing rods are hinged with each other, and the other ends of the two swing rods are hinged to the side wall of the plastic injection cylinder respectively; one end of the fixed rod is fixedly connected in the first groove through a spring, and the other end of the fixed rod is hinged on the two swing rods. By arranging the auxiliary unit, on one hand, the material powder in a molten state is accelerated to be injected into a mold cavity from a nozzle through the swinging of the swing rod, so that the working efficiency of the injection molding machine is improved; on the other hand, the heat generated in the heating of the material powder is utilized, and an additional power source is reduced, so that the utilization rate of resources is improved.

The temperature of the rotating rod is raised through the heating of the heater and the shearing friction heat of the rotating rod, at the moment, mercury in the first cavity on the right side of the push plate is heated to expand, the expanded mercury pushes the push plate to move to the side far away from the mercury, the space on the left side of the push plate is reduced, the pressure is increased, the increased air pressure is transmitted to the first groove, the fixed rod is enabled to move to the side far away from the rotating rod, the swing rod is pushed to swing, and the swinging swing rod accelerates the molten material powder to enter the nozzle; when the temperature is reduced, the mercury shrinks, the push plate moves to the side close to the mercury, the space on the left side of the push plate is enlarged, the pressure is reduced, and the fixed rod drives the swing rod to move to the side close to the rotating rod; the swing of the swing rod is controlled through repeated thermal expansion and contraction of mercury, so that the molten material powder is injected into the die cavity from the nozzle.

Preferably, the diameter of the channel of the nozzle is gradually increased from left to right, and the inner wall of the nozzle is provided with a second groove; a first plate is arranged in the second groove and fixedly connected to the second groove through a spring; a passageway has been seted up on annotating the plastic cylinder, is equipped with No. two control boxes on the passageway, and a passageway tip and No. two groove intercommunications produce steam when heating the injection molding feed cylinder, carry to a groove department through a passageway for a board motion, simultaneously, through the motion range of No. two control box control boards one board. According to the injection molding machine, the diameter of the channel of the nozzle is gradually increased from left to right, the number plate is arranged, more molten material powder is gathered at the nozzle, and the movement of the number plate is controlled to inject more molten material powder into the mold cavity from the nozzle, so that the working efficiency of the injection molding machine is improved.

When more molten powder is gathered at the nozzle by the swinging of the swing rod, at the moment, hot gas generated by heating the injection molding material cylinder is conveyed to the first plate, the first plate moves to one side far away from the second groove under the action of the hot gas, and the first plate extrudes the molten powder; when the hot air conveying to the first plate is stopped, the first plate is reset under the action of the spring; the hot air is controlled to act on a plate, so that the molten material powder is extruded by the plate, and the molten material powder is injected into a die cavity.

Preferably, the feeding barrel is divided into an inner barrel and an outer barrel; the inner charging barrel is made of an aluminum alloy material, a channel is formed between the inner charging barrel and the outer charging barrel and communicated with the first channel, hot air is generated when the injection molding charging barrel is heated and conveyed to the inner charging barrel, and material powder in the inner charging barrel is preheated. According to the injection molding machine, the feeding barrel is arranged into the inner barrel and the outer barrel, hot air is conveyed to the inner barrel, and the inner barrel is made of the aluminum alloy material, so that the conveyed hot air acts on the material powder, the material powder is preheated, the efficiency of changing the material powder into a molten state is accelerated, and the working efficiency of the injection molding machine is improved.

The utility model provides a hydraulic control system of servo energy-conserving hydraulic pressure injection molding machine, includes the control unit, and the control unit is used for controlling the operation of injection molding machine, its characterized in that: the hydraulic control unit comprises a first control valve, a second control valve, a third control valve and a hydraulic control one-way valve, wherein the first control valve, the second control valve, the third control valve and the hydraulic control one-way valve are all connected with the control unit; the second control valve is used for controlling the work of the first control box, and the first control box controls the air pressure quantity transmitted to the first groove from the first chamber; the third control valve is used for controlling the work of the second control box, and the second control box is used for controlling the discharge amount of the molten material powder from the nozzle; the hydraulic check valve is installed in the first control box and used for controlling one-way transmission of air pressure in the first chamber.

The invention has the following beneficial effects:

1. according to the servo energy-saving hydraulic injection molding machine and the hydraulic control system thereof, on one hand, the material powder adhered to the plastic injection cylinder is changed into a molten state through the mutual cooperation of the cleaning unit, the heater, the permanent magnet, the electrified coil and the hydraulic cylinder, and then the molten material powder is scraped off from the side wall of the plastic injection cylinder through the lantern-shaped cleaning unit, so that the material powder is prevented from being accumulated on the plastic injection cylinder, the fluidity of the molten material powder in the plastic injection cylinder is improved, and the stability of the material powder injection molding work is improved; on the other hand, the expansion and contraction of the hydraulic cylinder are controlled through the temperature of the hydraulic oil, so that the energy source in injection molding is reused, and the energy saving performance of the injection molding machine is improved.

2. According to the servo energy-saving hydraulic injection molding machine and the hydraulic control system thereof, the convex teeth are composed of the electric heating wire and the iron sheet, the electric heating wire, the iron sheet and the electric heating coil are matched with each other, the electric heating wire and the electric heating coil are cooperatively heated inside and outside, the material powder which is cooled and solidified is accelerated to be changed into a molten state, and meanwhile, the iron sheet scrapes the material powder adhered to the side wall of the plastic injection cylinder during the rotation of the rotating rod, so that the cleaning efficiency of the plastic injection cylinder is improved.

3. According to the servo energy-saving hydraulic injection molding machine and the hydraulic control system thereof, the auxiliary unit is arranged, so that on one hand, the material powder in a molten state is accelerated to be injected into a mold cavity from a nozzle through the swinging of the swing rod, and the working efficiency of the injection molding machine is improved; on the other hand, the heat generated in the heating of the material powder is utilized, and an additional power source is reduced, so that the utilization rate of resources is improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the hydraulic cylinder in an initial state;

FIG. 3 is a cross-sectional view of the hydraulic cylinder in an extended state;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

FIG. 5 is a schematic view of the structure of the cleaning unit;

FIG. 6 is an enlarged view of a portion of FIG. 1 at B;

FIG. 7 is an enlarged view of a portion of FIG. 1 at C;

in the figure: the device comprises a plastic injection cylinder 1, a limit switch 11, a servo motor 12, a speed reducer 13, a heater 14, a first channel 15, a telescopic mechanism 2, a baffle plate 21, a guide rod 22, a narrow part 23, a cleaning unit 3, a permanent magnet 31, a hydraulic cylinder 4, a shell cover 41, a radiator 411, a first shell 42, a first area 421, a second area 422, a second shell 43, a first disc 431, a third shell 44, a second disc 441, an expansion bag 45, a feeding cylinder 5, an inner cylinder 51, an outer cylinder 52, a nozzle 6, a second groove 61, a first plate 62, a second control box 63, a rotating rod 7, a first cavity 71, a first groove 72, a push plate 73, a convex tooth 8, an electric heating wire 81, an iron sheet 82, an auxiliary unit 9, a swing rod 91, a fixed rod 92 and a first control box 93.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 7, the servo energy-saving hydraulic injection molding machine comprises an injection molding material cylinder 1, a limit switch 11, a servo motor 12, a speed reducer 13, a heater 14 and a telescopic mechanism 2; the cleaning device also comprises a cleaning unit 3 and a hydraulic cylinder 4; the plastic injection cylinder 1 is provided with a feeding cylinder 5 and a nozzle 6, and a rotating rod 7 and an electrified coil are arranged in the plastic injection cylinder 1; the limit switch 11 is arranged at the front end of the plastic injection barrel 1, and the limit switch 11 is used for enabling the servo motor 12 to rotate reversely; the rotating rod 7 is provided with convex teeth 8; the cleaning unit 3 is arranged at the bottom of the plastic injection cylinder 1, teeth meshed with the convex teeth 8 are arranged on the inner ring of the cleaning unit 3, a heating coil is arranged in the cleaning unit 3, the section of the cleaning unit 3 is in a lantern shape, and permanent magnets 31 are arranged at two ends of the cleaning unit 3; the permanent magnet 31 is matched with the electrified coil; the inner wall of the plastic injection cylinder 1 is also in a lantern shape; the outer ring of the cleaning unit 3 is in clearance fit with the inner ring of the injection molding charging barrel 1; the telescopic mechanism 2 is arranged at the bottom of the rotating rod 7, and the telescopic mechanism 2 comprises a baffle plate 21; guide rods 22 penetrate through two ends of the baffle plate 21, and a narrow part 23 on the rotating rod 7 penetrates through the center of the baffle plate 21; the bottom of the rotating rod 7 is connected with a hydraulic cylinder 4; the telescopic mechanism 2 is also connected with a speed reducer 13 and a servo motor 12; the hydraulic cylinder 4 comprises a shell cover 41, a first shell 42, a second shell 43, a third shell 44 and an expansion bag 45; the second shell 43 and the third shell 44 are both made of aluminum alloy materials, the aluminum alloy materials accelerate heat conduction, the second shell 43 is located on the inner side of the first shell 42, the second shell 43 is located on the outer side of the third shell 44, a first area 421 is formed between the first shell 42 and the second shell 43, and a second area 422 is formed between the second shell 43 and the third shell 44; the shell cover 41 is connected with the first shell 42, and the middle part of the shell cover 41 is provided with a radiator 411; the radiator 411 is communicated with the first area 421 through a pipeline, and the radiator 411 is communicated with the second area 422 through a channel; a first disc 431 is sleeved on the outer ring of the second shell 43; a second disc 441 is arranged inside the third shell 44; the second disc 441 and the first disc 431 are made of magnetic materials, and the first disc 431 and the second disc 441 are mutually attracted; the expansion bag 45 is located in the second area 422, the expansion bag 45 is installed on the side walls of the second shell 43 and the third shell 44 through plates, the sections of the inner side wall and the outer side wall of the expansion bag 45 are surrounded by waves and are arranged into the waves, the contact area is increased, heat conduction is accelerated, the shapes of the sections of the inner wall of the second shell 43 and the outer wall of the third shell 44 are matched with the shape of the section of the expansion bag 45, ethanol is arranged inside the expansion bag 45, and the expansion of the first shell 42 is matched with the expansion of the second shell 42 through the heating expansion of the ethanol. Injection molding machines are the most used machines in the plastics processing industry; the existing injection molding machine pushes the molten raw materials to the nozzle 6 through the plunger or the rotating rod 7 and injects the molten raw materials into the mold to form a plastic part, but the existing injection molding machine has the defects that on one hand, the gap between the rotating rods 7 is large, and the molten raw materials are adhered to the gap between the rotating rods 7, so that the rotating rods 7 are inconvenient to clean; on the other hand, the powder adhered to the side wall of the plastic injection cylinder 1 is not easy to clean, and a stacking phenomenon is caused in time, so that the fluidity of the molten material in the plastic injection cylinder 1 is reduced, and the stability of the injection molding work is influenced; according to the invention, the plastic injection cylinder 1, the servo motor 12, the speed reducer 13, the heater 14, the limit switch 11, the telescopic mechanism 2, the cleaning unit 3 and the hydraulic cylinder 4 are arranged, on one hand, the powder adhered to the plastic injection cylinder 1 is changed into a molten state through the mutual matching among the cleaning unit 3, the heater 14, the permanent magnet, the electrified coil and the hydraulic cylinder 4, and then the molten state powder is scraped from the side wall of the plastic injection cylinder 1 through the lantern-shaped cleaning unit 3, so that the powder is prevented from being accumulated on the plastic injection cylinder 1, the fluidity of the molten powder in the plastic injection cylinder 1 is improved, and the stability of the powder injection molding work is further improved; on the other hand, the expansion and contraction of the hydraulic cylinder 4 are controlled through the temperature of the hydraulic oil, so that the energy source in the injection molding is reused, and the energy-saving property of the injection molding machine is improved.

Firstly, feeding powder into the plastic injection cylinder 1 from the feeding cylinder 5, and conveying the powder added into the plastic injection cylinder 1 forwards along the rotating rod 7 along with the rotation of the rotating rod 7; meanwhile, the temperature is gradually increased by the heating of the heater 14 and the shearing friction heat action of the rotating rod 7 until a certain pressure is generated after the molten plastic is in a viscous flow state; when the pressure at the head of the rotating rod 7 reaches the resistance capable of overcoming the backward movement of the first shell 42 in the hydraulic cylinder 4, the rotating rod 7 gradually retreats while rotating, so that molten plastic is injected into a mold cavity from the nozzle 6; after the same batch of powder is used up, when another mould is replaced, the middle is kept still for a period of time, the inner side of the plastic injection cylinder 1 is adhered by the powder and is difficult to clean, the telescopic mechanism 2 is opened at the moment, a chute is arranged on the narrow-shrinkage part 23 of the rotating rod 7 of the telescopic mechanism 2, and the hydraulic cylinder 4 is driven at the moment; when the hydraulic oil is conveyed to the hydraulic cylinder 4, the hydraulic oil is firstly radiated through the radiator 411 and conveyed to the first area 421, the first disc 431 is extruded by the hydraulic oil, the first disc 431 moves towards the side far away from the shell cover 41, meanwhile, the second disc 441 moves towards the side far away from the shell cover 41 due to the mutual attraction of the first disc 431 and the second disc 441, and gas generated in the movement of the second disc 441 is conveyed to the first shell 42 and moves towards the side far away from the shell cover 41 by matching with the first shell 42; because the temperature of the hydraulic oil entering the first area 421 is high, the temperature is transmitted to the expansion bag 45 through the second shell 43, the ethanol is heated to expand, the plate on the expansion bag 45 is pushed, meanwhile, the gas generated in the pushing process is blown to the radiator 411, and the auxiliary radiator 411 radiates the heat of the hydraulic oil; the narrowing part 23 slides backwards under the driving of the hydraulic cylinder 4 until the shoulder part of the rotating rod 7 is close to the top of the injection molding material cylinder 1, at the moment, the rotating rod 7 is shrunk to the end, a convex tooth 8 is arranged on the rotating rod 7 at a certain distance, no convex tooth 8 is arranged behind the rotating rod 7 at a certain distance, the backward shrinking distance of the telescopic mechanism 2 is the same as the distance between the convex tooth 8 of the rotating rod 7 and the cleaning unit 3, and therefore the rotating rod 7 is meshed with the cleaning unit 3; at the moment, the servo motor 12 starts to work to drive the rotating rod 7 to rotate, after the rotating rod 7 is matched with the cleaning unit 3, the telescopic mechanism 2 returns to the original state, the rotating rod 7 rotates forwards, the rotating rod 7 rotating forwards is matched with teeth on the cleaning unit 3, because the sections of the inner walls of the cleaning unit 3 and the plastic injection cylinder 1 are in lantern shapes, resistance exists between the cleaning unit 3 and the plastic injection cylinder 1, the cleaning unit 3 pushes the powder inside the plastic injection cylinder 1 forwards, and the cooled and solidified powder is pushed forwards by heating through a heating coil while being pushed forwards; touch limit switch 11 when cleaning unit 3 reachs the foremost end of dwang 7, control servo motor 12 and begin the reversal, drive the reversal of dwang 7, cleaning unit 3 resets backward, and limit switch 11 controls telescopic machanism 2 simultaneously and contracts backward, and after cleaning unit 3 returned initial position, the permanent magnet 31 of both ends setting was adsorbed by the magnetic force after the circular telegram coil circular telegram of injection molding feed cylinder 1.

As an embodiment of the present invention, the diameter of the rotating rod 7 gradually increases from left to right, so that the molten material powder flows from the right side of the rotating rod 7 to the left side of the rotating rod 7. The existing rod is a straight rod, and molten material powder is not easy to flow from the right side of the rod to the left side of the rod, so that the flowability is influenced; according to the invention, the diameter of the rotating rod 7 is gradually increased from left to right, so that the molten material powder quickly flows from the right side of the rotating rod 7 to the left side of the rotating rod 7 in the injection molding process of the material powder; meanwhile, in the cleaning of the side wall of the injection molding material cylinder 1, the molten material powder cleaned by the cleaning unit 3 and the convex teeth 8 in a matched mode falls onto the rotating rod 7 and flows to the nozzle 6, and therefore the cleaning efficiency of the material powder processed by the rotating rod 7 is improved.

As an embodiment of the present invention, the convex teeth 8 are composed of an electric heating wire 81 and an iron sheet 82; the iron sheet 82 wraps the electric heating wire 81, the temperature of the iron sheet 82 is increased through heating of the electric heating wire 81, and the material powder cooled and solidified in the injection molding material cylinder 1 is changed into a molten state. According to the invention, the convex teeth 8 are composed of the electric heating wire 81 and the iron sheet 82, the electric heating wire 81, the iron sheet 82 and the electric heating coil are matched with each other, the electric heating wire 81 and the electric heating coil are cooperatively heated inside and outside, the material powder which is cooled and solidified is accelerated to be changed into a molten state, and meanwhile, in the rotation of the rotating rod 7, the iron sheet 82 scrapes the material powder adhered to the side wall of the plastic injection cylinder 1, so that the cleaning efficiency of the plastic injection cylinder 1 is improved.

As an embodiment of the present invention, an auxiliary unit 9 is provided on the rotating rod 7; the auxiliary unit 9 is used for accelerating the molten material powder to enter the nozzle 6, and the auxiliary unit 9 comprises a swing rod 91, a fixed rod 92 and a first control box 93; a first cavity 71 and a first groove 72 are formed in the rotating rod 7; a push plate 73 is arranged in the first chamber 71, mercury is filled on the right side of the push plate 73, and the push plate 73 is pushed to slide through the thermal expansion of the mercury; one end of the first control box 93 is communicated with the first cavity 71 through a first pipeline, the other end of the first control box 93 is communicated with the first groove 72 through a second pipeline, a hydraulic control one-way valve is arranged at the second pipeline, and the first control box 93 is used for controlling the air pressure quantity transmitted to the first groove 72 from the first cavity 71; the number of the swing rods 91 is two, one ends of the two swing rods 91 are hinged with each other, and the other ends of the two swing rods 91 are respectively hinged on the side wall of the plastic injection cylinder 1; one end of the fixed rod 92 is fixedly connected in the first groove 72 through a spring, and the other end of the fixed rod 92 is hinged on the two swing rods 91. By arranging the auxiliary unit 9, on one hand, the material powder in a molten state is accelerated to be injected into a mold cavity from the nozzle 6 through the swinging of the swinging rod 91, so that the working efficiency of the injection molding machine is improved; on the other hand, the heat generated in the heating of the material powder is utilized, and an additional power source is reduced, so that the utilization rate of resources is improved.

The temperature of the rotating rod 7 is raised through the heating of the heater 14 and the shearing friction heat of the rotating rod 7, at the moment, mercury in the first cavity 71 on the right side of the push plate 73 is heated and expanded, the expanded mercury pushes the push plate 73 to move to the side far away from the mercury, the space on the left side of the push plate 73 is reduced, the pressure is increased, the increased air pressure is transmitted to the first groove 72, the fixed rod 92 moves to the side far away from the rotating rod 7, the swing rod 91 is pushed to swing, and the swinging swing rod 91 accelerates the molten material powder to enter the nozzle 6; when the temperature is reduced, the mercury shrinks, the push plate 73 moves to the side close to the mercury, the space on the left side of the push plate 73 is enlarged, and the pressure is reduced, so that the fixed rod 92 drives the swing rod 91 to move to the side close to the rotating rod 7; the swing of the swing rod 91 is controlled through the repeated thermal expansion and contraction of mercury, so that the molten powder is injected into the die cavity from the nozzle 6.

As an embodiment of the invention, the diameter of the channel of the nozzle 6 is gradually increased from left to right, and the inner wall of the nozzle 6 is provided with a second groove 61; a first plate 62 is arranged in the second groove 61, and the first plate 62 is fixedly connected to the second groove 61 through a spring; a first channel 15 is formed in the plastic injection cylinder 1, a second control box 63 is arranged on the first channel 15, the end portion of the first channel 15 is communicated with the second groove 61, hot air is generated when the plastic injection cylinder 1 is heated, the hot air is conveyed to the first groove 72 through the first channel 15, the first plate 62 moves, and meanwhile, the movement amplitude of the first plate 62 is controlled through the second control box 63. According to the invention, the diameter of the channel of the nozzle 6 is gradually increased from left to right, the number plate 62 is arranged, so that more molten material powder is gathered at the nozzle 6, and the movement of the number plate 62 is controlled to inject more molten material powder into the mold cavity from the nozzle 6, so that the working efficiency of the injection molding machine is improved.

When more molten powder is gathered at the nozzle 6 through the swinging of the swing rod 91, at the moment, hot gas generated by heating the plastic injection cylinder 1 is conveyed to the first plate 62, the first plate 62 moves to the side far away from the second groove 61 under the action of the hot gas, and the first plate 62 extrudes the molten powder; when the hot air is stopped being supplied to the first plate 62, the first plate 62 is reset under the action of the spring; by controlling the action of hot air on a plate 62, the plate 62 extrudes the molten powder, and the injection of the molten powder into the mold cavity is accelerated.

As an embodiment of the present invention, the feed cylinder 5 is divided into an inner cylinder 51 and an outer cylinder 52; the inner material cylinder 51 is made of an aluminum alloy material, a channel is formed between the inner material cylinder 51 and the outer material cylinder 52 and is communicated with the first channel 15, and hot air generated when the plastic injection cylinder 1 is heated is conveyed to the inner material cylinder 51, so that material powder in the inner material cylinder 51 is preheated. According to the injection molding machine, the feeding cylinder 5 is provided with the inner cylinder 51 and the outer cylinder 52, hot air is conveyed to the inner cylinder 51, and the inner cylinder 51 is made of an aluminum alloy material, so that the conveyed hot air acts on the powder, the powder is preheated, the efficiency of changing the powder into a molten state is increased, and the working efficiency of the injection molding machine is improved.

The utility model provides a hydraulic control system of servo energy-conserving hydraulic pressure injection molding machine, includes the control unit, and the control unit is used for controlling the operation of injection molding machine, its characterized in that: the hydraulic control unit comprises a first control valve, a second control valve, a third control valve and a hydraulic control one-way valve, wherein the first control valve, the second control valve, the third control valve and the hydraulic control one-way valve are all connected with the control unit, the first control valve is used for controlling the hydraulic cylinder 4 to work, the hydraulic oil pump provides power for the hydraulic cylinder 4, and the hydraulic cylinder 4 is used for controlling the translation of the rotating rod 7 in the horizontal direction; the second control valve is used for controlling the work of the first control box 93, and the first control box 93 controls the air pressure quantity transmitted to the first groove 72 from the first chamber 71; the third control valve is used for controlling the operation of the second control box 63, and the second control box 63 is used for controlling the discharge amount of the molten material powder from the nozzle 6; the hydraulic check valve is installed at the first control box 93 and used for controlling one-way transmission of air pressure at the first chamber 71.

When the injection molding device works, firstly, the material powder is put into the injection molding cylinder 1 from the feeding cylinder 5, the material powder is preheated at the feeding cylinder 5 in the adding process, and the preheated material powder added into the injection molding cylinder 1 is conveyed forwards along the rotating rod 7 along with the rotation of the rotating rod 7; meanwhile, the temperature is gradually increased by the heating of the heater 14 and the shearing friction heat action of the rotating rod 7 until a certain pressure is generated after the molten plastic is in a viscous flow state; when the pressure at the head of the rotating rod 7 reaches the resistance capable of overcoming the backward movement of the first shell 42 in the hydraulic cylinder 4, the rotating rod 7 gradually retreats while rotating, so that molten plastic is injected into a mold cavity from the nozzle 6; after the same batch of powder is used up, when another mould is replaced, the middle is kept still for a period of time, the inner side of the plastic injection cylinder 1 is adhered by the powder and is difficult to clean, the telescopic mechanism 2 is opened at the moment, a chute is arranged on the narrow-shrinkage part 23 of the rotating rod 7 of the telescopic mechanism 2, and the hydraulic cylinder 4 is driven at the moment; when the hydraulic oil is conveyed to the hydraulic cylinder 4, the hydraulic oil is firstly radiated through the radiator 411 and conveyed to the first area 421, the first disc 431 is extruded by the hydraulic oil, the first disc 431 moves towards the side far away from the shell cover 41, meanwhile, the second disc 441 moves towards the side far away from the shell cover 41 due to the mutual attraction of the first disc 431 and the second disc 441, and gas generated in the movement of the second disc 441 is conveyed to the first shell 42 and moves towards the side far away from the shell cover 41 by matching with the first shell 42; because the temperature of the hydraulic oil entering the first area 421 is high, the temperature is transmitted to the expansion bag 45 through the second shell 43, the ethanol is heated to expand, the plate on the expansion bag 45 is pushed, meanwhile, the gas generated in the pushing process is blown to the radiator 411, and the auxiliary radiator 411 radiates the heat of the hydraulic oil; the narrowing part 23 slides backwards under the driving of the hydraulic cylinder 4 until the shoulder part of the rotating rod 7 is close to the top of the injection molding material cylinder 1, at the moment, the rotating rod 7 is shrunk to the end, a convex tooth 8 is arranged on the rotating rod 7 at a certain distance, no convex tooth 8 is arranged behind the rotating rod 7 at a certain distance, the backward shrinking distance of the telescopic mechanism 2 is the same as the distance between the convex tooth 8 of the rotating rod 7 and the cleaning unit 3, and therefore the rotating rod 7 is meshed with the cleaning unit 3; at the moment, the servo motor 12 starts to work to drive the rotating rod 7 to rotate, after the rotating rod 7 is matched with the cleaning unit 3, the telescopic mechanism 2 returns to the original state, the rotating rod 7 rotates forwards, the rotating rod 7 rotating forwards is matched with teeth on the cleaning unit 3, because the sections of the inner walls of the cleaning unit 3 and the plastic injection cylinder 1 are in lantern shapes, resistance exists between the cleaning unit 3 and the plastic injection cylinder, the cooled and solidified material powder is changed into molten state under the action of the heating coil and the electric heating wire 81, and the cleaning unit 3 pushes the molten powder forwards; touch limit switch 11 when cleaning unit 3 reachs the foremost end of dwang 7, control servo motor 12 and begin the reversal, drive the reversal of dwang 7, cleaning unit 3 resets backward, and limit switch 11 controls telescopic machanism 2 simultaneously and contracts backward, and after cleaning unit 3 returned initial position, the permanent magnet 31 of both ends setting was adsorbed by the magnetic force after the circular telegram coil circular telegram of injection molding feed cylinder 1.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.

Claims

1. A servo energy-saving hydraulic injection molding machine comprises an injection plastic cylinder (1), a limit switch (11), a servo motor (12), a speed reducer (13), a heater (14) and a telescopic mechanism (2); the method is characterized in that: the device also comprises a cleaning unit (3) and a hydraulic cylinder (4); the plastic injection cylinder (1) is provided with a feeding cylinder (5) and a nozzle (6), and a rotating rod (7) and an electrified coil are arranged in the plastic injection cylinder (1); the limit switch (11) is arranged at the front end of the plastic injection barrel (1), and the rotating rod (7) is provided with a convex tooth (8); the cleaning unit (3) is arranged at the bottom of the plastic injection cylinder (1), teeth meshed with the convex teeth (8) are arranged on the inner ring of the cleaning unit (3), a heating coil is arranged in the cleaning unit (3), the section of the cleaning unit (3) is in a lantern shape, and permanent magnets (31) are arranged at two ends of the cleaning unit (3); the permanent magnet (31) is matched with the electrified coil; the inner wall of the plastic injection cylinder (1) is also in a lantern shape; the outer ring of the cleaning unit (3) is in clearance fit with the inner ring of the plastic injection cylinder (1); the telescopic mechanism (2) is arranged at the bottom of the rotating rod (7), and the telescopic mechanism (2) comprises a baffle plate (21); guide rods (22) penetrate through two ends of the baffle plate (21), and a narrow-reducing part (23) on the rotating rod (7) penetrates through the center of the baffle plate (21); the bottom of the rotating rod (7) is connected with a hydraulic cylinder (4); the telescopic mechanism (2) is also connected with a speed reducer (13) and a servo motor (12); the hydraulic cylinder (4) comprises a shell cover (41), a first shell (42), a second shell (43), a third shell (44) and an expansion bag (45); the second shell (43) and the third shell (44) are both made of aluminum alloy materials, the second shell (43) is located on the inner side of the first shell (42), the second shell (43) is located on the outer side of the third shell (44), a first area (421) is formed between the first shell (42) and the second shell (43), and a second area (422) is formed between the second shell (43) and the third shell (44); the shell cover (41) is connected with the first shell (42), and the middle of the shell cover (41) is provided with a radiator (411); the radiator (411) is communicated with the first area (421) through a pipeline, and the radiator (411) is communicated with the second area (422) through a channel; a first disc (431) is sleeved on the outer ring of the second shell (43); a second disc (441) is arranged inside the third shell (44); the second disc (441) and the first disc (431) are made of magnetic materials, and the first disc (431) and the second disc (441) are mutually attracted; the expansion bag (45) is located in the second area (422), the expansion bag (45) is installed on the side walls of the second shell (43) and the third shell (44) through plates, the sections of the inner side wall and the outer side wall of the expansion bag (45) are enclosed by waves, the shapes of the sections of the inner wall of the second shell (43) and the outer wall of the third shell (44) are matched with the shape of the section of the expansion bag (45), and ethanol is arranged inside the expansion bag (45).

2. The servo energy-saving hydraulic injection molding machine according to claim 1, characterized in that: the diameter size of dwang (7) increases from a left side to the right side gradually, and the material powder of the fuse state of being convenient for flows to dwang (7) left side from dwang (7) right side.

3. The servo energy-saving hydraulic injection molding machine according to claim 1, characterized in that: the convex teeth (8) consist of an electric heating wire (81) and an iron sheet (82); the iron sheet (82) wraps the electric heating wire (81), the temperature of the iron sheet (82) is increased through heating of the electric heating wire (81), and the powder cooled and solidified in the injection molding material cylinder (1) is changed into a molten state.

4. The servo energy-saving hydraulic injection molding machine according to claim 1, characterized in that: an auxiliary unit (9) is arranged on the rotating rod (7); the auxiliary unit (9) is used for accelerating the molten material powder to enter the nozzle (6), and the auxiliary unit (9) comprises a swing rod (91), a fixed rod (92) and a first control box (93); a first cavity (71) and a first groove (72) are formed in the rotating rod (7); a push plate (73) is arranged in the first cavity (71), mercury is filled on the right side of the push plate (73), and the push plate (73) is pushed to slide through the thermal expansion of the mercury; one end of the first control box (93) is communicated with the first cavity (71) through a first pipeline, the other end of the first control box (93) is communicated with the first groove (72) through a second pipeline, a hydraulic control one-way valve is arranged at the second pipeline, and the first control box (93) is used for controlling the air pressure amount of the first cavity (71) conveyed to the first groove (72); the number of the swing rods (91) is two, one ends of the two swing rods (91) are hinged with each other, and the other ends of the two swing rods (91) are hinged to the side wall of the plastic injection cylinder (1) respectively; one end of the fixed rod (92) is fixedly connected in the first groove (72) through a spring, and the other end of the fixed rod (92) is hinged on the two swing rods (91).

5. The servo energy-saving hydraulic injection molding machine according to claim 1, characterized in that: the diameter of the channel of the nozzle (6) is gradually increased from left to right, and a second groove (61) is formed in the inner wall of the nozzle (6); a first plate (62) is arranged in the second groove (61), and the first plate (62) is fixedly connected to the second groove (61) through a spring; annotate and seted up one on plastic cylinder (1) passageway (15), be equipped with No. two control box (63) on one passageway (15), one passageway (15) tip and No. two groove (61) intercommunication will annotate and produce steam when plastic cylinder (1) heating, carry to a groove (72) department through one passageway (15) for a board (62) motion, simultaneously, through the motion range of No. two control box (63) control one board (62).

6. The servo energy-saving hydraulic injection molding machine according to claim 1, characterized in that: the feeding cylinder (5) is divided into an inner cylinder (51) and an outer cylinder (52); the inner charging barrel (51) is made of an aluminum alloy material, a channel is formed between the inner charging barrel (51) and the outer charging barrel (52) and is communicated with the first channel (15), and hot air generated when the plastic injection barrel (1) is heated is conveyed into the inner charging barrel (51), so that powder in the inner charging barrel (51) is preheated.

7. The utility model provides a hydraulic control system of servo energy-conserving hydraulic pressure injection molding machine which characterized in that: the system is used for any one of the hydraulic injection molding machines in claims 1 to 6, and comprises a control unit and a hydraulic control unit, wherein the control unit is used for controlling the operation of the injection molding machine, the hydraulic control unit comprises a first control valve, a second control valve, a third control valve and a hydraulic control one-way valve, the first control valve, the second control valve, the third control valve and the hydraulic control one-way valve are all connected with the control unit, the first control valve is used for controlling the hydraulic cylinder (4) to work, the hydraulic oil pump provides power for the hydraulic cylinder (4), and the hydraulic cylinder (4) is used for controlling the translation of the rotating rod (7) in the horizontal direction; the second control valve is used for controlling the work of the first control box (93), and the first control box (93) controls the air pressure quantity transmitted to the first groove (72) from the first chamber (71); the third control valve is used for controlling the work of the second control box (63), and the second control box (63) is used for controlling the discharge amount of the molten material powder from the nozzle (6); the hydraulic one-way valve is arranged at the first control box (93) and is used for controlling one-way transmission of air pressure at the first chamber (71).