CN110039721B

CN110039721B - Driving system for high-precision injection mold

Info

Publication number: CN110039721B
Application number: CN201910330474.5A
Authority: CN
Inventors: 石涧飞
Original assignee: Hangzhou Suokai Industrial Co ltd
Current assignee: HANGZHOU SUOKAI INDUSTRIAL Co.,Ltd.
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2021-12-21
Anticipated expiration: 2039-04-23
Also published as: CN110039721A

Abstract

A high accuracy is actuating system for injection mold, is used for high accuracy injection mold, high accuracy injection mold includes hydraulic drive spare, and actuating system contains oil tank, filter, drive gear pump, driving motor and drive valves, the input of drive gear pump is connected to the filter in the oil tank, and the output is connected to the drive valves, driving motor's output shaft is connected to the drive gear pump, driving motor is servo motor, the drive valves contain electromagnetism reversing valve, check valve and the one-way throttle valve that set up in proper order in series at least, the front end of electromagnetism reversing valve is connected to the drive gear pump, the end of one-way throttle valve is connected to the rodless chamber of hydraulic drive spare through the pipeline; therefore, the injection molding device is simple in structure, convenient to operate and wide in application range, and effectively improves the injection molding precision of the molded workpiece and the excellent rate of the molded workpiece.

Description

Driving system for high-precision injection mold

Technical Field

The invention relates to the technical field of injection molds, in particular to a driving system for a high-precision injection mold.

Background

Injection molding is a method for producing moldings from industrial products, which generally use rubber injection molding and plastic injection molding. The injection molding can be classified into injection molding and die casting. An injection molding machine (an injection machine or an injection molding machine for short) is a main molding device for making thermoplastic plastics or thermosetting materials into plastic products with various shapes by using a plastic molding die, and the injection molding is realized by the injection molding machine and the die.

However, the existing injection mold is still rough, poor in precision and sealing performance, high in product defect rate and difficult to fall off after the product is formed, and the mold is easy to damage and the product quality is easy to influence.

Therefore, in view of the above-mentioned drawbacks, the present inventors have conducted extensive research and design to overcome the above-mentioned drawbacks by designing and developing a drive system for a high-precision injection mold, which combines the experience and results of the related industries for many years.

Disclosure of Invention

The invention aims to provide a driving system for a high-precision injection mold, which is simple in structure and convenient to operate and can effectively overcome the defects of the prior art.

In order to solve the problems, the invention discloses a driving system for a high-precision injection mold, which is used for the high-precision injection mold, the high-precision injection mold comprises a base station and a top cover, the base station is provided with an electric hydraulic control cabinet and a lower mounting seat, an upper mounting seat corresponding to the lower mounting seat is arranged below the top cover, a self-adaptive mold assembly is arranged between the upper mounting seat and the lower mounting seat, the self-adaptive mold assembly comprises a lower mold assembly connected with the lower mounting seat and an upper mold assembly arranged on the upper mounting seat, the upper mold assembly comprises an upper fixing seat and an upper mold, the upper fixing seat is connected with the upper mounting seat in a vertically sliding manner through a plurality of guide posts, the lower end of the upper fixing seat is provided with an upper mold, the lower surface of the upper mold is provided with an upper mold cavity, the upper mounting seat is also provided with a hydraulic driving piece, and the lower end of the hydraulic driving piece is connected with the upper fixing seat to drive the upper fixing seat to carry out telescopic injection molding, the method is characterized in that:

the actuating system contains oil tank, filter, drive gear pump, driving motor and drive valves, the input of drive gear pump is connected to the filter in the oil tank, and the output is connected to the drive valves, driving motor's output shaft is to drive gear pump, driving motor is servo motor, the drive valves contains electromagnetic directional valve, check valve and the one-way throttle valve that establish ties in proper order and set up at least, the front end of electromagnetic directional valve is connected to the drive gear pump, the end of one-way throttle valve is connected to the rodless chamber of hydraulic drive spare through the pipeline.

Wherein: and a ball valve and an overflow valve are also arranged between the one-way throttle valve and the hydraulic driving piece.

Wherein: and an energy accumulator is also arranged between the electromagnetic directional valve and the driving gear pump.

Wherein: the bed die subassembly contains fixing base and bed die down, the lower extreme of fixing base is fixed to mount pad down, and the lower extreme of bed die is fixed in to the upper end, the middle part of fixing base forms the holding chamber that supplies the self-adaptation subassembly holding down, the upper surface of bed die is equipped with the lower die cavity that corresponds to last die cavity, the self-adaptation subassembly contains to float and sets up roof, many spliced poles, lower even board and the supporting seat in the lower die cavity, the supporting seat set up in the holding intracavity, even the board sets up in the holding intracavity and lies in the supporting seat top down equally, roof and lower even board are connected through many spliced poles, and the bed die is equipped with a plurality of through-holes that supply the spliced pole to run through, and all registrate on each spliced pole have both ends to lean on respectively to lean on the reset spring of even board and bed die down.

Wherein: the ejection assembly comprises a plurality of ejection cam rods positioned between the lower connecting plate and the supporting seat, the ejection cam rods comprise cam portions positioned between the lower connecting plate and the supporting seat, the cam portions are fixed relative to the lower fixing seat in a rotatable mode through fixing pins, and the fixing pins are arranged on the rear side of the cam portions, so that the cam portions can eject the lower connecting plate upwards relative to the supporting seat when rotating, and further drive the top plate to move upwards in the lower die cavity.

Wherein: the outer end of the cam part is also provided with a driving part in an extending way, and the driving part extends into the lower fixed seat and is hinged to the tail end of a telescopic rod of the ejection oil cylinder so as to perform relative rotation and ejection operation of the ejection cam rod through the extension and retraction of the ejection oil cylinder.

With the above configuration, the drive system for a high-precision injection mold according to the present invention has the following effects:

1. the structure is simple, the operation is convenient, and the application is wide;

2. the rapid forming in the injection molding process can be realized through the self-adaptive function, and the ejection assembly is utilized to rapidly eject the formed workpiece, so that the injection molding precision of the formed workpiece is effectively improved;

3. the hydraulic control is reliable, the driving is more accurate, and the excellent rate of the formed workpiece is effectively improved.

The details of the present invention can be obtained from the following description and the attached drawings.

Drawings

Fig. 1 shows a schematic structural view of a high-precision injection mold to which the present invention is applied.

Fig. 2 shows a schematic structure diagram of the adaptive mold assembly according to the present invention.

Fig. 3 shows a schematic view of the drive system for a high-precision injection mold of the present invention.

Reference numerals:

1. a base station; 2. a top cover; 3. a buffer column; 4. an electric hydraulic control cabinet; 5. a lower mounting seat; 6. a lower module assembly; 7. an upper mounting seat; 8. an upper module assembly; 9. injection molding a tube; 10. a discharging mechanism; 11. an upper fixed seat; 12. an upper die; 13. an upper mold cavity; 14. a lower fixed seat; 15. a lower die; 16. an accommodating cavity; 17. a lower die cavity; 18. a top plate; 19. a through hole; 20. connecting columns; 21. a return spring; 22. a lower connecting plate; 23. a supporting seat; 24. a fixing pin; 25. ejecting the cam rod; 26. ejecting an oil cylinder; 101. an oil tank; 102. a filter; 103. driving a gear pump; 104. a drive motor; 105. an accumulator; 106. an electromagnetic directional valve; 107. a one-way valve; 108. a one-way throttle valve; 109. an overflow valve.

Detailed Description

Referring to fig. 1 and 2, a high precision injection mold to which the present invention is applied is shown.

High accuracy injection mold includes base station 1 and top cap 2, connect through many buffering stands 3 between base station 1 and the top cap 2, be equipped with electric hydraulic control cabinet 4 and lower mount pad 5 on the base station 1, the below of top cap 2 is equipped with the last mount pad 7 that corresponds to mount pad 5 down, go up mount pad 7 and be equipped with self-adaptation mould subassembly down between the mount pad 5 to provide the self-adaptation effect in the injection moulding.

Wherein, in the lower extreme of each buffering stand 3 was fixed to the installation concave hole of base station 1, the upper end ran through top cap 2 and was connected to top cap 2 through the bolster to provide direction and buffering function, the bolster can be for surrounding the compression spring who is connected to buffering stand 3 and top cap 2 respectively in buffering stand 3 and both ends.

Wherein, the side of the self-adaptive die assembly is provided with a discharging mechanism 10.

The self-adaptive die assembly comprises a lower die assembly 6 connected and arranged on the lower mounting seat 5 and an upper die assembly 8 arranged on the upper mounting seat 7.

Referring to fig. 2, the upper mold assembly 8 includes an upper fixing seat 11 and an upper mold 12, the upper fixing seat 11 is connected to an upper mounting seat 7 through a plurality of guide posts in a vertically sliding manner, the lower end of the upper fixing seat 11 is provided with the upper mold 12, the lower surface of the upper mold 12 is provided with an upper mold cavity 13, the upper mounting seat 7 is further provided with a hydraulic driving member, the lower end of the hydraulic driving member is connected to the upper fixing seat 11 to drive the upper fixing seat 11 to perform telescopic injection molding, the upper end of the upper fixing seat 11 is provided with an injection molding pipe 9, the injection molding pipe 9 can be connected to a feeding mechanism, the feeding mechanism can include a feeding pipeline and a heating assembly, the feeding pipeline can supply injection molding materials through a spiral supply device, the heating assembly is arranged outside the feeding pipeline to externally heat the injection molding materials, and a cutter for cutting off a connection portion of the molded workpiece and the injection molding pipe 9 after injection molding is further arranged in the upper fixing seat 11, these structures are conventional devices in the art and will not be described in detail herein.

The lower die assembly 6 comprises a lower fixing seat 14 and a lower die 15, the lower end of the lower fixing seat 14 is fixed to a lower mounting seat 5, the upper end of the lower die is fixed to the lower end of the lower die 15, an accommodating cavity 16 for accommodating the adaptive assembly is formed in the middle of the lower fixing seat 14, a lower die cavity 17 corresponding to the upper die cavity 13 is arranged on the upper surface of the lower die 15, so that the upper fixing seat, namely the upper die, is pushed to be attached to the lower die through a hydraulic driving piece, the upper die cavity and the lower die cavity are mutually wedged to form an injection molding die cavity, the adaptive assembly comprises a top plate 18, a plurality of connecting columns 20, a lower connecting plate 22 and a supporting seat 23, the supporting seat 23 is arranged in the accommodating cavity 16, the lower connecting plate 22 is also arranged in the accommodating cavity and located above the supporting seat 23, the top plate 18 and the lower connecting plate 22 are connected through a plurality of connecting columns 20, and the lower die 15 is provided with a plurality of through holes 19 corresponding to allow the connecting columns 20 to run through, and all registrate on each spliced pole 20 has both ends to lean on respectively in the reset spring 21 of even board 22 and bed die 15 down, reset spring 21 can float roof 18 and set up in lower die cavity 17 to support the function through reset spring 21's elasticity in injection moulding, carry out the self-adaptation function to the different viscosity of the material of moulding plastics, temperature and pressure.

In order to realize the ejection function after injection molding at the same time during self-adaptation, an ejection assembly is further provided, the ejection assembly comprises a plurality of ejection cam rods 25 positioned between the lower connecting plate 22 and the supporting seat 23, the ejection cam rods 25 can be symmetrically distributed as shown in the figure so as to realize balanced ejection during ejection and avoid offset and damage to an upper mold, the ejection cam rods 25 comprise cam parts positioned between the lower connecting plate 22 and the supporting seat 23, the cam parts are rotatably fixed relative to the lower fixing seat 14 through fixing pins 24, the fixing pins 24 are arranged at the rear sides of the cam parts, so that the cam parts can eject the lower connecting plate 22 upwards relative to the supporting seat 23 during rotation, further drive the top plate 18 to move upwards in the lower mold cavity 17, and after the injection molding is finished, the hydraulic driving rod drives the upper fixing seat 11 and the upper mold 12 to be separated relative to the lower mold assembly 6, the formed workpiece can be ejected out through the upward movement of the top plate 18, and the efficiency is greatly improved.

Wherein, the outer end of the cam part is further extended with a driving part, the driving part extends into the lower fixed seat and is hinged with the tail end of the telescopic rod of the ejection cylinder 26, so that the relative rotation and ejection operation of the ejection cam rod 25 are carried out through the extension and retraction of the ejection cylinder 26.

Referring to fig. 3, the driving system for a high-precision injection mold according to the present invention is shown, and is used for precisely driving a hydraulic driving member, and includes an oil tank 101, a filter 102, a driving gear pump 103, a driving motor 104, and a driving valve set, wherein an input end of the driving gear pump 103 is connected to the filter 102 in the oil tank 101, an output end of the driving gear pump 103 is connected to the driving valve set, an output shaft of the driving motor 104 is connected to the driving gear pump 103, and the driving motor 104 is a servo motor to effectively improve driving precision, and the driving valve set supplies hydraulic oil to the hydraulic driving member.

The driving valve group at least comprises an electromagnetic directional valve 106, a one-way valve 107 and a one-way throttle valve 108 which are sequentially connected in series, the front end of the electromagnetic directional valve 106 is connected to the driving gear pump 103, the tail end of the one-way throttle valve 108 is connected to a rodless cavity of the hydraulic driving part through a pipeline, a ball valve and an overflow valve 109 are further arranged between the one-way throttle valve 108 and the hydraulic driving part 17, and an energy accumulator 105 is further arranged between the electromagnetic directional valve 106 and the driving gear pump 103.

The driving system is simple and convenient in structure, simple and reliable in control and capable of being effectively applied to high-precision injection molds.

Therefore, the invention has the advantages that:

It should be apparent that the foregoing description and illustrations are by way of example only and are not intended to limit the present disclosure, application or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention will include any embodiments falling within the foregoing description and the appended claims.

Claims

1. A driving system for a high-precision injection mold is used for the high-precision injection mold, the high-precision injection mold comprises a base station and a top cover, an electric hydraulic control cabinet and a lower mounting seat are arranged on the base station, an upper mounting seat corresponding to the lower mounting seat is arranged below the top cover, a self-adaptive mold assembly is arranged between the upper mounting seat and the lower mounting seat, the self-adaptive mold assembly comprises a lower mold assembly connected to the lower mounting seat and an upper mold assembly arranged on the upper mounting seat, the upper mold assembly comprises an upper fixing seat and an upper mold, the upper fixing seat is connected to the upper mounting seat in a vertically sliding manner through a plurality of guide columns, an upper mold is arranged at the lower end of the upper fixing seat, an upper mold cavity is arranged at the lower surface of the upper mold, a hydraulic driving piece is further arranged on the upper mounting seat, and the lower end of the hydraulic driving piece is connected to the upper fixing seat to drive the upper fixing seat to perform telescopic injection molding, the method is characterized in that:

the driving system comprises an oil tank, a filter, a driving gear pump, a driving motor and a driving valve group, wherein the input end of the driving gear pump is connected to the filter in the oil tank, the output end of the driving gear pump is connected to the driving valve group, the output shaft of the driving motor is connected to the driving gear pump, the driving motor is a servo motor, the driving valve group at least comprises an electromagnetic directional valve, a one-way valve and a one-way throttle valve which are sequentially connected in series, the front end of the electromagnetic directional valve is connected to the driving gear pump, and the tail end of the one-way throttle valve is connected to a rodless cavity of a hydraulic driving piece through a pipeline;

a ball valve and an overflow valve are also arranged between the one-way throttle valve and the hydraulic driving piece, and an energy accumulator is also arranged between the electromagnetic directional valve and the driving gear pump;

the lower die set component comprises a lower fixed seat and a lower die, the lower end of the lower fixed seat is fixed to a lower mounting seat, the upper end of the lower fixed seat is fixed at the lower end of the lower die, a containing cavity for containing the self-adaptive component is formed in the middle of the lower fixed seat, the upper surface of the lower die is provided with a lower die cavity corresponding to the upper die cavity, therefore, the upper fixed seat, namely the upper die, is pushed to be attached to the lower die through a hydraulic driving piece, the upper die cavity and the lower die cavity are mutually wedged and formed into an injection molding die cavity, the self-adaptive component comprises a top plate, a plurality of connecting columns, a lower connecting plate and a supporting seat, the supporting seat is arranged in the containing cavity, the lower connecting plate is also arranged in the containing cavity and positioned above the supporting seat, the top plate and the lower connecting plate are connected through the plurality of connecting columns, the lower die is provided with a plurality of through holes corresponding to the connecting columns, and the two ends of the lower connecting columns are respectively abutted against the reset springs of the lower connecting plate and the lower die, the reset spring can float and arrange the top plate in the lower die cavity, so that the self-adaptive function is performed on different viscosities, temperatures and pressures of injection molding materials through the elastic abutting function of the reset spring in the injection molding process;

the ejection assembly comprises a plurality of ejection cam rods positioned between the lower connecting plate and the supporting seat, and the ejection cam rods comprise cam parts positioned between the lower connecting plate and the supporting seat.

2. The drive system for a high precision injection mold according to claim 1, characterized in that: the cam part is fixed relative to the lower fixing seat in a rotatable mode through a fixing pin, and the fixing pin is arranged on the rear side of the cam part, so that the cam part can push the lower connecting plate upwards relative to the supporting seat when rotating, and further drives the top plate to move upwards in the lower die cavity.

3. The drive system for a high precision injection mold according to claim 2, characterized in that: the outer end of the cam part is also provided with a driving part in an extending way, and the driving part extends into the lower fixed seat and is hinged to the tail end of a telescopic rod of the ejection oil cylinder so as to perform relative rotation and ejection operation of the ejection cam rod through the extension and retraction of the ejection oil cylinder.