CN112721072A

CN112721072A - Energy-saving injection molding machine

Info

Publication number: CN112721072A
Application number: CN202011307533.6A
Authority: CN
Inventors: 许文华
Original assignee: Ningbo Huacheng Rubber & Plastic Machinery Co ltd
Current assignee: Ningbo Huacheng Rubber & Plastic Machinery Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-04-30
Anticipated expiration: 2040-11-19
Also published as: CN112721072B

Abstract

The application relates to an energy-saving injection molding machine, which relates to the field of injection molding and solves the problems that although an injection mechanism does not inject materials into a mold in the process of taking out a product after the mold is opened, but still needs to supply heat to the glue inside the injection mechanism, resulting in the problem of waste of energy of the injection mechanism, the injection molding machine comprises an injection device and a mold closing device, wherein the mold closing device comprises a mold closing rack, a movable mold plate connected to the mold closing rack in a sliding manner, a fixed mold plate fixed on the mold closing rack, a mold closing oil cylinder fixed on the mold closing rack and driving the movable mold plate to be close to or far away from the fixed mold plate, a lower mold fixing plate connected to the fixed mold plate in a sliding manner, and at least one sliding driving mechanism arranged on the fixed mold plate and driving the lower mold fixing plate to slide, the lower die fixing plate can be used for fixing at least two dies side by side, and the connecting line of the two adjacent dies is parallel to the sliding direction of the lower die fixing plate. The application has the effects of improving the utilization rate of the injection device of the injection molding machine and reducing the waste of energy of the injection device.

Description

Energy-saving injection molding machine

Technical Field

The application relates to the field of injection molding, in particular to an energy-saving injection molding machine.

Background

An injection molding machine, also known as an injection molding machine or an injection molding machine, is a main molding device for molding thermoplastic plastics, thermosetting plastics or rubber into products of various shapes by utilizing a molding die, and is divided into a vertical type, a horizontal type and a full-electric type.

As shown in fig. 1, in the related art, an energy-saving injection molding machine includes a machine body 11, a mold clamping frame 12 disposed on an upper side of the machine body 11, a fixed mold plate 13 fixed on a lower side of the mold clamping frame 12, a lower mold 14 fixed on an upper side of the fixed mold plate 13, a movable mold plate 15 slidably connected to the mold clamping frame 12 in a vertical direction and disposed on an upper side of the lower mold 14, an upper mold 16 fixed on a lower side of the movable mold plate 15, a mold clamping cylinder 17 fixed on an upper side of the mold clamping frame 12 for driving the movable mold plate 15 to move up and down, and an injection mechanism 18 disposed on the machine body 11 toward the lower mold 14 for injecting a material into the lower mold.

In view of the above-mentioned related art, the inventor believes that, during the process of taking out the product after the mold is opened, the injection mechanism does not inject the mold, but still needs to supply heat to the glue inside the injection mechanism, which results in waste of energy of the injection mechanism and leaves room for improvement.

Disclosure of Invention

In order to improve the utilization rate of an injection device of an injection molding machine and reduce the waste of energy of the injection device, the application provides an energy-saving injection molding machine.

The application provides an energy-conserving injection molding machine adopts following technical scheme:

an energy-saving injection molding machine comprises an injection device and a mold closing device, wherein the mold closing device comprises a mold closing rack, a movable mold plate connected to the mold closing rack in a sliding manner, a fixed mold plate fixed on the mold closing rack, a mold closing oil cylinder fixed on the mold closing rack and driving the movable mold plate to be close to or far away from the fixed mold plate, a lower mold fixing plate connected to the fixed mold plate in a sliding manner, and at least one sliding driving mechanism arranged on the fixed mold plate and driving the lower mold fixing plate to slide, wherein the lower mold fixing plate can be used for fixing at least two lower molds side by side, and the connecting line of the two adjacent lower;

the fixed die plate is fixed with at least one sliding rail, the lower die fixing plate is fixed with sliding blocks which correspond to the sliding rails one to one, and the sliding blocks are connected to the sliding rails in a sliding mode.

By adopting the technical scheme, in the process of opening one mold to take out a product, the injection device can inject rubber materials into other molds on the mold closing device of the injection molding machine, so that the time gap of taking out the product after the previous mold is opened is reasonably utilized, the energy waste of the injection device is reduced, and the utilization rate of the injection device of the injection molding machine is improved.

Optionally, the sliding driving mechanism includes a driving oil cylinder fixed on the fixed die plate, a piston rod of the driving oil cylinder is fixedly connected with the lower die fixing plate, and the sliding directions of the piston rod of the driving oil cylinder and the lower die fixing plate are parallel to each other.

By adopting the technical scheme, after one of the molds is opened, the driving oil cylinder drives the mold after the mold is opened to slide away from the injection device, and simultaneously drives the mold which is not injected with the rubber material to move close to the injection device, so that the rubber material is injected into the mold which is not injected with the rubber material by the injection device, the time of taking out a product after the previous mold is opened is reasonably utilized, the energy waste of the injection device is reduced, and the utilization rate of the injection device of the injection molding machine is improved.

Optionally, both sides of the lower die fixing plate are provided with shielding pieces for covering the sliding rails, one end of each shielding piece is fixed on the lower die fixing plate, and the other end of each shielding piece is fixed on the fixed die plate.

Through adopting above-mentioned technical scheme, shelter from the setting of piece, cover the slide rail, make hard things such as waste material in the mould be difficult for dropping on the slide rail to slider and slide rail are difficult for being pressed against and hinder the damage when making the slider slide on the slide rail, have improved the life of slide rail and slider.

Optionally, one side of the fixed die plate, which is far away from the lower die fixing plate, is rotatably connected with a guide roller which is abutted to the shielding sheet.

Through adopting above-mentioned technical scheme, the setting of guide roll will shelter from the piece and convert the sliding friction of fixed die plate into rolling friction, and the wearing and tearing when having reduced the use of sheltering from the piece have improved the life who shelters from the piece.

Optionally, a hanging-down part is formed in the middle of the shielding piece, a first counterweight column is arranged on the hanging-down part, limiting plates are fixed to two ends of the first counterweight column, and the two limiting plates are respectively arranged on two sides of the shielding piece.

Through adopting above-mentioned technical scheme, the limiting plate is located the both sides that shelter from the piece respectively, carries on spacingly to first counter weight post for first counter weight post is difficult for following the landing on the shelter from the piece, has improved the stability of first counter weight post when sheltering from the piece and going up and down.

Optionally, a second counterweight column is fixed between the two limiting plates, a through hole is formed between the first counterweight column and the limiting plates, and the shielding piece penetrates through the through hole.

Through adopting above-mentioned technical scheme, the perforation that supplies the shielding piece to wear to establish is formed with limiting plate, the cooperation of first counter weight post to second counter weight post for first counter weight post is difficult for landing on the shielding piece, has improved the stability of first counter weight post when shielding piece goes up and down.

Optionally, the injection device includes the injection frame, locate the injection mechanism of injection frame upside, be fixed in the lifter at injection mechanism both ends, be fixed in injection frame upside and locate the first backup pad at lifter both ends and at least one locate the actuating mechanism who orders about the lifter on the injection frame, be equipped with the hole that slides that the one end that supplies the lifter wears to establish on the first backup pad.

Through adopting above-mentioned technical scheme, the lifter both ends wear to locate in the sliding hole and slide with first backup pad and be connected to guide injection mechanism to slide along vertical direction, order about the lifter through actuating mechanism and go up and down and realize injection mechanism's height-adjustable, in order to annotate the material to not unidimensional mould, widened injection mechanism's application scope.

Optionally, the number of the driving mechanisms is at least one, each driving mechanism includes at least two first screw rod lifters respectively arranged on the lower sides of the two lifting rods and a first driving motor fixed on the injection rack and driving a worm of the first screw rod lifter to rotate, and the upper end of a screw rod of each first screw rod lifter is fixed with the lifting rod.

Through adopting above-mentioned technical scheme, first driving motor orders about the worm of first lead screw lift and rotates, and then orders about the lead screw lift of first lead screw lift to realize the regulation of lifter height.

Optionally, the injection mechanism includes an extrusion cylinder, an extrusion screw rotatably connected in the extrusion cylinder, a rotating motor fixed at one end of the extrusion cylinder for driving the extrusion screw to rotate, an injection nozzle fixedly connected at the other end of the extrusion cylinder, a material tip screwed at one end of the extrusion screw close to the injection nozzle, a check ring sleeved at one side of the material tip close to the extrusion screw, and a thrust ring sleeved at one side of the material tip close to the extrusion screw, wherein one end of the material tip close to the injection nozzle extends out of the extrusion cylinder, and at least one clamping groove is formed on the outer side wall of one end of the material tip close to the injection nozzle.

Through adopting above-mentioned technical scheme, be equipped with the centre gripping groove on the lateral wall of the tip of material near the one end of injection nozzle, when conveniently clearing up the remaining sizing material of tip department, directly through instrument such as spanner with the tip of material from extrude the screw rod pull down can, and need not to extrude the screw rod and pull down together with the tip of material, improved the clearance efficiency of the remaining sizing material of injection mechanism tip department.

Optionally, the device further comprises a balancing mechanism arranged on two sides of the lower die fixing plate, the balancing mechanism comprises at least one first balancing rod with one end hinged to the fixed die plate and a second balancing rod with one end fixed to one end of the first balancing rod and the other end higher than the upper surface of the lower die fixing plate, two sides of the fixed die plate are both fixed with overhanging plates, and the other end of the first balancing rod abuts against the lower side of one overhanging plate;

when an upper die on the lower die fixing plate is contacted with the lower die, the other end of the second balance rod is abutted to the movable die plate.

Through adopting above-mentioned technical scheme, the compound die hydro-cylinder orders about the in-process that the movable mould board descends, when last mould and lower mould contact, the other end and the movable mould board butt of second balancing pole, the compound die hydro-cylinder continues to apply pressure and orders about the mould compound die, the other end of first balancing pole upwards promotes the lower mould fixed plate, in order to offset the pressure that the mould transmitted for the lower mould fixed plate, make slider and slide rail difficult because of pressure deformation damage when the mould compound die, make the difficult increase of frictional force between slider and the slide rail after the mould compound die, the life of slider and slide rail has been improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the time gap for taking out the product after the mold opening of the previous mold is reasonably utilized, the waste of energy of the injection device is reduced, and the utilization rate of the injection device of the injection molding machine is improved;

2. the driving mechanism drives the lifting rod to lift, so that the height of the injection mechanism is adjustable, the injection of the molds with different sizes is realized, and the application range of the injection mechanism is widened.

Drawings

Fig. 1 is a schematic structural view of an energy-saving injection molding machine in the related art.

Fig. 2 is a schematic structural view of an energy-saving injection molding machine according to embodiment 1 of the present application.

Fig. 3 is a schematic structural view of a mold clamping device according to embodiment 1 of the present application.

Fig. 4 is a schematic partial explosion diagram of a lower die fixing plate, a slider, a slide rail fixed die plate, and a slide driving mechanism according to embodiment 1 of the present application.

Fig. 5 is an enlarged view of a portion a in fig. 3.

Fig. 6 is a schematic structural view of an injection device according to embodiment 1 of the present application.

Fig. 7 is a partial structural schematic view of the driving mechanism, the first support plate, and the lifting rod according to embodiment 1 of the present application.

Fig. 8 is a partial plan view of the injection mechanism of embodiment 1 of the present application.

Fig. 9 is a sectional view taken along line B-B in fig. 8.

Fig. 10 is a schematic view of the structure of the tip of example 1 of the present application.

Fig. 11 is a schematic partial explosion view of the lower mold fixing plate, the slide block, the slide rail fixed mold plate, and the slide driving mechanism according to embodiment 2 of the present application.

Fig. 12 is a schematic structural view of an injection device according to embodiment 3 of the present application.

Fig. 13 is a schematic structural view of an injection device according to embodiment 4 of the present application.

Fig. 14 is a partial structural schematic view of the drive mechanism, the first support plate, and the injection rack according to embodiment 4 of the present application.

Fig. 15 is a schematic structural view of an injection device according to embodiment 5 of the present application.

Fig. 16 is a partial structural schematic view of the drive mechanism, the first support plate, and the injection rack according to embodiment 5 of the present application.

Fig. 17 is a schematic configuration diagram of a mold clamping device according to embodiment 6 of the present application.

Fig. 18 is a schematic structural view of a balance mechanism according to embodiment 6 of the present application.

Description of reference numerals: 11. a body; 12. a mold closing rack; 13. fixing a template; 14. a lower die; 15. moving the template; 16. an upper die; 17. a die closing oil cylinder; 18. an injection mechanism; 2. an injection device; 21. an injection rack; 22. a lifting rod; 221. a second limiting plate; 23. a first support plate; 231. a sliding hole; 24. a drive mechanism; 241. a first lead screw lifter; 242. a first drive motor; 243. a second lead screw lifter; 244. a second drive motor; 245. a first drive screw; 2451. a thrust ball bearing; 246. a rotating member; 247. a third drive motor; 248. a second drive screw; 2481. a support member; 249. a fourth drive motor; 25. an injection mechanism; 251. a support pillar; 252. an extrusion cylinder; 253. extruding a screw; 254. an injection nozzle; 2541. a storage tank; 255. material sharpening; 2551. a clamping groove; 256. a non-return ring; 257. a thrust ring; 26. a power cylinder; 3. a mold clamping device; 31. a mold closing rack; 32. moving the template; 33. fixing a template; 331. a slide rail; 332. a guide roller; 333. a second support plate; 34. a die closing oil cylinder; 35. a lower die fixing plate; 351. a slider; 352. a shielding sheet; 3521. a hanging-down part; 3522. a first counterweight column; 3523. a first limit plate; 3524. a second counterweight column; 3525. perforating; 353. a connecting plate; 354. an overhang plate; 36. a slip drive mechanism; 361. a driving oil cylinder; 362. driving the screw rod; 363. a drive block; 364. a drive motor; 37. a balancing mechanism; 371. a first balance bar; 3711. a hinged column; 372. a second balance bar; 373. a return spring; 374. a lifting plate; 3741. an arc-shaped sheet.

Detailed Description

The present application is described in further detail below with reference to figures 2-18.

The embodiment of the application discloses an energy-saving injection molding machine.

Example 1

Referring to fig. 2, the injection molding machine includes an injection device 2 and a mold clamping device 3, the injection device 2 is used for injecting rubber material into a cavity of a mold on the mold clamping device 3, and the mold clamping device 3 is used for driving the mold to be clamped or opened.

Referring to fig. 3 and 4, the mold clamping device 3 includes a mold clamping frame 31, a movable platen 32, a fixed platen 33, a mold clamping cylinder 34, a lower mold fixing plate 35, and a slide drive mechanism 36.

The fixed die plate 33 is fixed on the die closing rack 31, the movable die plate 32 is connected to the die closing rack 31 in a sliding mode, the movable die plate 32 is located on the upper side of the fixed die plate 33, the movable die plate 32 is used for fixing an upper die of the die, the die closing oil cylinder 34 is fixed on the die closing rack 31, the die closing oil cylinder 34 is located on the movable die plate 32, and a piston rod of the die closing oil cylinder 34 is fixed on the upper side of the movable die plate 32 so as to drive the movable die plate 32 to be close to or; the lower die fixing plate 35 is connected to the fixed die plate 33 in a sliding manner along the horizontal direction, the lower die fixing plate 35 can be used for fixing the lower dies of two dies side by side along the horizontal direction, the connecting line of the lower dies of two adjacent dies is parallel to the sliding direction of the lower die fixing plate 35, the number of the sliding driving mechanisms 36 is at least one, in this embodiment, the number of the sliding driving mechanisms 36 is two, the two sliding driving mechanisms 36 are arranged on two sides of the lower die fixing plate 35, and the sliding driving mechanisms 36 are used for driving the lower die fixing plate 35 to slide on the fixed die plate 33.

At least one slide rail 331 is fixed on the upper side of the fixed die plate 33, in the embodiment, the number of the slide rails 331 is one, the slide blocks 351 corresponding to the slide rails 331 one by one are fixed on the lower side of the lower die fixing plate 35, and the slide blocks 351 are connected to the slide rails 331 in a sliding manner, so that the lower die fixing plate 35 is connected to the fixed die plate 33 in a sliding manner; the sliding driving mechanism 36 includes a driving oil cylinder 361, the driving oil cylinder 361 is fixed on the upper side of the fixed mold plate 33, the axis of the piston rod of the driving oil cylinder 361 is parallel to the sliding direction of the lower mold fixing plate 35, a connecting plate 353 is fixed on the lower mold fixing plate 35, and the piston rod of the driving oil cylinder 361 is fixed with the connecting plate 353 to drive the lower mold fixing plate 35 to slide on the fixed mold plate 33, so as to drive the lower mold of the mold on the lower mold fixing plate 35 to slide, thereby facilitating the injection device to inject the next mold with glue.

The lower die fixing plate 35 is further provided with two shielding pieces 352, the shielding pieces 352 are used for shielding the sliding rails 331, so that sundries such as rubber materials in the die are not prone to falling onto the sliding rails 331 when the die is taken out or cleaned, the two shielding pieces 352 are respectively arranged at two ends of the sliding direction of the lower die fixing plate 35, the shielding pieces 352 can be made of rubber or plastic, one end of each shielding piece 352 is fixed with one end of the lower die fixing plate 35, and the other end of each shielding piece 352 is fixed with one end of the sliding rail 331; both ends of the slide rail 331 are rotatably connected with guide rollers 332, and the guide wheels are abutted against the shielding sheet 352 to convert sliding friction with the slide rail 331 when the shielding sheet 352 slides into rolling friction.

Referring to fig. 3 and 5, a hanging part 3521 is formed in the middle of the shielding piece 352 by naturally hanging, and a first counterweight column 3522 is inserted into the hanging part 3521 to guide the hanging part 3521 of the shielding piece 352 to lift, so that the shielding piece 352 can synchronously slide along with the slider 351, and the shielding piece 352 is not easily clamped between the slide rail 331 and the slider 351; first limiting plates 3523 are fixed at two ends of the first counterweight column 3522, and the two first limiting plates 3523 are respectively located at two sides of the shielding piece 352, so that the first counterweight column 3522 is not easy to slide away from the drooping portion 3521; a second counterweight column 3524 is further fixed between the two first limiting plates 3523, a through hole 3525 is formed by the first counterweight column 3522, the first limiting plate 3523 and the first counterweight column 3522 in a matching manner, and the shielding plate 352 is arranged in the through hole 3525 in a penetrating manner, so that the first counterweight column 3522 is not easy to slide off the drooping portion 3521.

Referring to fig. 2 and 6, the injection device 2 includes an injection frame 21, an injection mechanism 25, a lift lever 22, a first support plate 23, and a drive mechanism 24; the injection mechanism 25 is a common knowledge of a person skilled in the art, and details are not described herein, the injection mechanism 25 is disposed toward the mold closing device 3, a length direction of the injection mechanism 25 is perpendicular to a sliding direction of the lower mold fixing plate 35, two parallel supporting columns 251 are disposed on a lower side of the injection mechanism 25, a base of the injection mechanism 25 is sleeved on the supporting columns 251 and is connected with the supporting columns 251 in a sliding manner, two ends of each supporting column 251 are respectively provided with a lifting rod 22, one lifting rod 22 corresponds to the two supporting columns 251, and one end of each of the two supporting columns 251 is fixed on the lifting rod 22; a power cylinder 26 is fixed on the lifting rod 22 far away from the mold closing device 3, a piston rod of the power cylinder 26 is parallel to the supporting column 251, and a piston rod of the power cylinder 26 is fixed with the injection mechanism 21 so as to drive the injection mechanism 21 to be close to or far away from the mold closing device 3; first backup pad 23 is fixed in the upside of injection frame 21, the quantity of first backup pad 23 is four, four corners of injection frame 21 are located respectively to four first backup pads 23, two first backup pads 23 are corresponding to a lifter 22, the hole 231 that slides has been seted up on the first backup pad 23, the hole 231 that slides is along vertical seting up on first backup pad 23, the one end of lifter 22 is worn to locate in the hole 231 that slides, lifter 22 slides in the hole 231 that slides, actuating mechanism 24 is used for ordering about lifter 22 and slides in the hole 231 that slides.

Referring to fig. 6 and 7, the number of the driving mechanisms 24 may be one, or may be two or more, in this embodiment, the number of the driving mechanisms 24 is one, and the driving mechanism 24 includes a first lead screw lifter 241 and a first driving motor 242; the number of the first lead screw lifters 241 is at least two, at least two first lead screw lifters 241 respectively correspond to two lifting rods 22, the number of the first lead screw lifters 241 can be two, or three or more, in this embodiment, the number of the first lead screw lifters 241 is two, the two first lead screw lifters 241 correspond to the lifting rods 22 one by one, the first lead screw lifters 241 are fixed on the injection rack 21, lead screws of the first lead screw lifters 241 are vertically arranged, and the upper ends of the lead screws of the first lead screw lifters 241 are fixed with the lifting rods 22; the number of the first driving motors 242 is one, the first driving motors 242 are fixed on the first support plate 23, an output shaft of each first driving motor 242 is fixedly connected with a worm of one first lead screw lifter 241, and the worms of the two first lead screw lifters 241 are connected through chain transmission, that is, one motor can drive the two first lead screw lifters 241 to rotate.

The two ends of the lifting rod 22 are all fixed with the second limiting plate 221 by screws, the second limiting plate 221 abuts against one end of the first supporting plate 23 far away from the lifting rod 22 and is connected with the first supporting plate 23 in a sliding manner so as to guide the lifting rod 22 to lift, and the lifting rod 22 is not easy to slide relative to the first supporting plate 23 along the length direction.

Referring to fig. 8 and 9, the injection mechanism 25 includes an extrusion cylinder 252, an extrusion screw 253, a rotation motor, an injection nozzle 254, a check ring 256, a thrust ring 257, and a material tip 255; the extruding screw 253 penetrates through the extruding cylinder 252 and is concentrically arranged with the extruding cylinder 252, the extruding screw 253 is rotatably connected with the extruding cylinder 252, the rotating motor is fixed at one end of the extruding cylinder 252, and the output shaft of the rotating motor is fixedly connected with the extruding screw 253 so as to drive the extruding screw 253 to rotate.

Referring to fig. 9 and 10, the nozzle 254 is fixed to the other end of the extrusion cylinder 252 by a bolt, and the nozzle 254 is concentrically arranged with the extrusion cylinder 252; the material tip 255 is arranged at one end of the extrusion screw 253 close to the injection nozzle 254, the material tip 255 sequentially comprises a first section, a second section, a third section, a fourth section and a fifth section from the extrusion screw 253 to the injection nozzle 254, an external thread is arranged on the outer side wall of the first section of the material tip 255, and an internal thread hole is arranged at the other end of the extrusion screw 253 so as to connect the material tip 255 to the extrusion screw 253 in a threaded manner; the diameter of the second section of the material tip 255 is larger than that of the first section, the thrust collar 257 is sleeved on the second section of the material tip 255, the diameter of the third section of the material tip 255 is larger than that of the second section, and the third section of the material tip 255 and the extrusion screw 253 are matched to clamp the thrust collar 257, so that the thrust collar 257 is not easy to slide along the axial direction of the second section; the fourth section of the material tip 255 is arranged in a cylindrical shape, the diameter of the fourth section of the material tip 255 is larger than that of the third section, the fifth section of the material tip 255 is arranged in a conical shape, the direction from the fourth section of the material tip 255 to the injection nozzle 254 of the fifth section of the material tip 255 is gradually reduced, a material storage groove 2541 is arranged at one end of the injection nozzle 254 close to the extrusion cylinder 252, and the material supply tip 255 of the material storage groove 2541 is inserted and embedded; the non-return ring 256 is sleeved on the third section of the material tip 255, the inner diameter of the non-return ring 256 is larger than the diameter of the third section of the material tip 255 and smaller than the diameter of the fourth section of the material tip 255, the outer diameter of the non-return ring 256 is equal to the inner diameter of the extrusion cylinder 252, the outer side wall of the non-return ring 256 is in abutting sliding contact with the inner wall of the extrusion cylinder 252, and the non-return ring 256 can also freely rotate in the extrusion cylinder 252; the fifth section of the material point 255 extends out of the extruding cylinder 252, and a clamping groove 2551 is formed in the outer side wall of the fifth section of the material point 255, so that the material point 255 can be conveniently disassembled and clamped by using a tool.

When the extrusion screw 253 injects the material in a direction close to the injection nozzle 254, the check ring 256 is separated from the thrust ring 257, and the extrusion screw 253 moves forward as the material is enclosed in the storage groove 2541 in the extrusion cylinder 252, and the injection nozzle 254 is opened to inject the material into the mold through the flow passage.

When the extrusion screw 253 retreats to plasticize materials, under the action of melt pressure, the non-return ring 256 moves forward until contacting the material tip 255, and the materials plasticized in the extrusion cylinder 252 pass through the gap between the thrust ring 257 and the inner cavity of the extrusion cylinder 252, the gap between the non-return ring 256 and the thrust ring 257, the gap between the non-return ring 256 and the material tip 255, the clamping groove 2551 of the material tip 255 and then enter the material storage section of the injection nozzle 254 close to the extrusion cylinder 252. With the increase of the pressure of the material storage section, the non-return ring 256 is pushed to move backwards, the gap between the material tip 255 and the non-return ring 256 is increased, the gap between the non-return ring 256 and the thrust ring 257 is continuously reduced, and because the injection nozzle 254 is closed during material plasticizing, the material cannot leak, and the material is injected only when the injection nozzle is opened.

The implementation principle of the embodiment 1 is as follows: the method comprises the following steps that more than two lower dies on a lower die fixing plate 35 share one upper die, the upper die is fixed on the lower side of a movable die plate 32, after a die closing oil cylinder 34 drives one of the dies to open, a sliding driving mechanism 36 drives the lower die fixing plate 35 to slide, the opened lower die of the die slides away from an injection mechanism 25, meanwhile, the lower die of the next die on the lower die fixing plate 35 is driven to slide to a position corresponding to the injection mechanism 25, the die closing oil cylinder 34 drives the upper die to descend for die closing, and a power oil cylinder 26 drives the injection mechanism 25 to be close to the die for injecting sizing materials into the die after die closing, so that the time gap for taking out a product after the previous die is opened is reasonably utilized, the energy; in use of the molding machine, the height of the injection mechanism 25 is adjustable by the drive mechanism 24 to enable the injection molding machine to accommodate molds of different height dimensions.

Example 2

Referring to fig. 11, the present embodiment is different from embodiment 1 in that the slide drive mechanism 36 includes a drive screw 362, a drive block 363, and a drive motor 364; the fixed die plate 33 is fixed with second support plates 333, the two second support plates 333 correspond to a driving screw rod 362, the two second support plates 333 are fixed on the fixed die plate 33 and located on the same side of the slide rail 331, two ends of the driving screw rod 362 are rotatably connected to the second support plates 333 through bearings, the driving screw rod 362 does not slide axially along the driving screw rod 362 relative to the fixed die plate 33, the driving block 363 is fixed on the lower die fixing plate 35, the driving block 363 is sleeved on the driving screw rod 362 and is in threaded connection with the driving screw rod 362, the driving motor 364 is fixed on one of the second support plates 333, and an output shaft of the driving motor 364 is fixed to one end of the driving screw rod 362 to drive the driving screw rod 362 to rotate.

Example 3

Referring to fig. 12, the present embodiment is different from embodiment 1 in that the number of the driving mechanisms 24 is at least two, at least two driving mechanisms 24 correspond to two lifting rods 22 respectively, the number of the driving mechanisms 24 may be two, or may be three or more, in the present embodiment, the number of the driving mechanisms 24 is two, two driving mechanisms 24 correspond to the lifting rods 22 one by one, and the driving mechanism 24 includes a second lead screw lifter 243 and a second driving motor 244; the two second lead screw elevators 243 correspond to the lifting rods 22 one by one, the second lead screw elevators 243 are fixed on the injection rack 21, the lead screws of the second lead screw elevators 243 are vertically arranged, and the upper ends of the lead screws of the second lead screw elevators 243 are fixed with the lifting rods 22; the second driving motor 244 is fixed to the first support plate 23, and the second driving motor 244 corresponds to the second lead screw lifters 243 one by one to drive the second lead screw lifters 243 to operate.

Example 4

Referring to fig. 13 and 14, the present embodiment is different from embodiment 1 in that the number of the driving mechanisms 24 is at least two, at least two driving mechanisms 24 correspond to two lifting rods 22 respectively, in the present embodiment, the number of the driving mechanisms 24 is two, two driving mechanisms 24 correspond to two lifting rods 22 one by one, and the driving mechanism 24 includes a first driving screw 245, a rotating member 246 and a third driving motor 247; the lower end of the first driving screw 245 is fixed on the injection frame 21, the first driving screw 245 is vertically arranged, the upper end of the first driving screw 245 penetrates through the middle part of the lifting rod 22, the first driving screw 245 is connected with the lifting rod 22 in a sliding manner, the rotating member 246 is sleeved on the first driving screw 245 and is positioned at the lower side of the lifting rod 22, the rotating member 246 is abutted against the lower side of the lifting rod 22, the rotating member 246 is connected to the first driving screw 245 in a threaded manner, and the rotating member 246 can be a sprocket or a gear; the third driving motor 247 is fixed on the upper side of the lifting rod 22, an output shaft of the third driving motor 247 penetrates through the lifting rod 22 and extends out of the lifting rod 22, and when the rotating member 246 is a chain wheel, the chain wheel is fixed on the output shaft of the third driving motor 247 so as to drive the rotating member 246 to rotate through chain transmission; when the rotating member 246 is a gear, the gear is fixed to the output shaft of the third driving motor 247 so that the rotating member 246 is driven to rotate by the intermeshing of the gears.

The first driving screw 245 is further sleeved with a thrust ball bearing 2451, the upper end of the thrust ball bearing 2451 is abutted with the lower end of the lifting rod 22, and the lower end of the thrust ball bearing 2451 is abutted with the upper end of the rotating piece 246 so as to convert sliding friction between the rotating piece 246 and the lifting rod 22 into rolling friction.

Example 5

Referring to fig. 15 and 16, the difference from embodiment 1 is that the drive mechanism 24 includes a second drive screw 248, a support 2481, a rotation shaft, and a fourth drive motor 249; the second driving screw rod 248 is vertically arranged, the lower end of the second driving screw rod 248 is arranged in an optical axis manner, the lower end of the second driving screw rod 248 penetrates through the injection rack 21 and is rotatably connected with the injection rack 21, the upper end of the second driving screw rod 248 penetrates through the middle part of the lifting rod 22 and is in threaded connection with the lifting rod 22, the support 2481 is sleeved on the second driving screw rod 248 and is fixedly connected with the second driving screw rod 248, the support 2481 abuts against the upper side of the injection rack 21, and the support 2481 can be a gear or a chain wheel; the fourth driving motor 249 is fixed at the lower side of the injection rack 21, an output shaft of the fourth driving motor 249 penetrates through the injection rack 21 and extends upwards out of the injection rack 21, the fourth driving motor 249 is used for driving the support 2481 to rotate, and further driving the second driving screw 248 to rotate, and when the support 2481 is a sprocket, the sprocket is fixed on the output shaft of the fourth driving motor 249, so as to drive the support 2481 to rotate through chain transmission; when the supporting member 2481 is a gear, the gear is fixed on the output shaft of the fourth driving motor 249, so that the supporting member 2481 is driven to rotate by the intermeshing of the gears.

The second driving screw 248 is also sleeved with a thrust ball bearing 2451, the lower end of the thrust ball bearing 2451 is abutted with the upper side of the injection rack 21, and the upper end of the thrust ball bearing 2451 is abutted with the lower end of the support 2481, so that the sliding friction between the support 2481 and the injection rack 21 is converted into rolling friction.

Example 6

The difference from embodiment 1 is that, referring to fig. 17 and 18, the slide mold further includes two balance mechanisms 37, the balance mechanisms 37 are provided on the fixed mold plate 33, the two balance mechanisms 37 are symmetrically provided on both sides of the lower mold fixing plate 35, and the balance mechanisms 37 are used for balancing the pressure transmitted to the lower mold fixing plate 35 by the mold, so that the slide block 351 and the slide rail 331 are not easily deformed and damaged by the pressure when the mold is clamped.

The balancing mechanism 37 includes a first balancing lever 371 and a second balancing lever 372; the first balancing rod 371 is located at one side of the lower die fixing plate 35, the lower end of the first balancing rod 371 is hinged to the fixed die plate 33, the outer extending plates 354 are integrally arranged at two sides of the lower die fixing plate 35 along the sliding direction, the upper end of the first balancing rod 371 extends to the lower side of the outer extending plates 354, and the upper end of the first balancing rod 371 is abutted to the lower side of the outer extending plates 354; the lower end of the second balancing rod 372 is integrally arranged with the lower end of the first balancing rod 371, and the upper end of the second balancing rod 372 is higher than the upper surface of the lower die fixing plate; in this embodiment, the balancing mechanism 37 includes two first balancing rods 371 and two second balancing rods 372, the two first balancing rods 371 and the two second balancing rods 372 are both located on the same side of the lower mold fixing plate 35, and the two second balancing rods 372 are symmetrical with respect to an bisector plane perpendicular to the sliding direction of the fixed mold plate 33 and the slider 351.

In the process that the movable die plate 32 descends under the driving of the die closing oil cylinder 34, when a lower die on the lower die fixing plate 35 contacts with an upper die, the upper end of the second balance rod 372 abuts against the movable die plate 32, the die closing oil cylinder 34 continues to apply pressure to drive the die to be closed, the second balance rod 372 drives the other end of the first balance rod 371 to upwards lift the lower die fixing plate 35 through leverage so as to offset the pressure transmitted by the die to the lower die fixing plate 35, and the sliding block 351 and the sliding rail 331 are not easily damaged due to the pressure transmitted by the die when the die is closed.

The counterbalance mechanism 37 also includes a lift plate 374; the lifting plate 374 is hinged to the upper end of the first balancing rod 371, and the upper side of the lifting plate 374 abuts against the lower side of the outer extending plate 354 to increase the contact area between the first balancing rod 371 and the outer extending plate 354, so that the outer extending plate 354 and the lower die fixing plate 35 are not easily deformed due to uneven stress, that is, the portion of the outer extending plate 354 contacting the first balancing rod 371 is deformed upwards, and the portion of the outer extending plate 354 contacting the first balancing rod 371 is deformed downwards.

The upper end of the first balancing rod 371 is integrally provided with a hinge column 3711, the axis of the hinge column 3711 is horizontally arranged, the axis of the hinge column 3711 is parallel to the hinge shaft of the first balancing rod 371, one end of the hinge column 3711 close to the lower die fixing plate 35 extends to the lower side of the outer extending plate 354, the lower side of the lifting plate 374 is fixedly welded with an arc-shaped piece 3741, the radial section of the arc-shaped piece 3741 is arranged in an arc shape, the arc-shaped piece 3741 is sleeved on the hinge column 3711 and is rotatably connected with the hinge column 3711 to hinge the lifting plate 374 to the upper end of the first balancing rod 371, so that the contact area between the lifting plate 374 and the outer extending plate 354 is kept unchanged in the die assembling process.

The balance mechanism 37 further includes a return spring 373, the return spring 373 is a tension spring, the return spring 373 is disposed on one side of the first balance bar 371 away from the second balance bar 372, the lower end of the return spring 373 is fixed on the upper surface of the fixed mold plate 33, the lower end of the return spring 373 is fixed on one side of the first balance bar 371 away from the second balance bar 372, so that after the mold is opened, the upper end of the first balance bar 371 is turned over downwards, the lifting plate 374 is not easily contacted with the outward extending plate 354 at the moment, and resistance when the lower mold fixing plate 35 slides is reduced.

The implementation principle of the embodiment 6 is as follows: in the process that the movable die plate 32 descends under the driving of the die closing oil cylinder 34, when the upper die contacts with the lower die, the upper end of the second balance rod 372 abuts against the movable die plate 32, the die closing oil cylinder 34 continues to apply pressure to drive the die to be closed, the upper end of the first balance rod 371 upwards overturns, the upper end of the first balance rod 371 drives the lifting plate 374 to upwards lift the lower die fixing plate 35 so as to offset the pressure transmitted to the lower die fixing plate 35 by the die, and the sliding block 351 and the sliding rail 331 are not prone to deformation and damage due to the pressure when the die is closed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An energy-saving injection molding machine comprising an injection device (2) and a mold clamping device (3), characterized in that: the mold closing device (3) comprises a mold closing rack (31), a movable mold plate (32) connected to the mold closing rack (31) in a sliding manner, a fixed mold plate (33) fixed on the mold closing rack (31), a mold closing oil cylinder (34) fixed on the mold closing rack (31) and used for driving the movable mold plate (32) to be close to or far away from the fixed mold plate (33), a lower mold fixing plate (35) connected to the fixed mold plate (33) in a sliding manner, and at least one sliding driving mechanism (36) arranged on the fixed mold plate (33) and used for driving the lower mold fixing plate (35) to slide, wherein the lower mold fixing plate (35) can be used for fixing at least two lower molds side by side, and the connecting line of two adjacent lower molds is parallel;

at least one sliding rail (331) is fixed on the fixed die plate (33), sliding blocks (351) which correspond to the sliding rails (331) one by one are fixed on the lower die fixing plate (35), and the sliding blocks (351) are connected to the sliding rails (331) in a sliding mode.

2. An energy efficient injection molding machine as defined in claim 1 wherein: the sliding driving mechanism (36) comprises a driving oil cylinder (361) fixed on the fixed die plate (33), a piston rod of the driving oil cylinder (361) is fixedly connected with the lower die fixing plate (35), and the sliding directions of the piston rod of the driving oil cylinder (361) and the lower die fixing plate (35) are parallel to each other.

3. An energy efficient injection molding machine as defined in claim 1 wherein: the two sides of the lower die fixing plate (35) are provided with shielding pieces (352) covering the sliding rails (331), one end of each shielding piece (352) is fixed on the lower die fixing plate (35), and the other end of each shielding piece (352) is fixed on the fixed die plate (33).

4. An energy efficient injection molding machine as claimed in claim 3, wherein: and one side of the fixed die plate (33) far away from the lower die fixing plate (35) is rotatably connected with a guide roller (332) which is in rolling contact with the shielding sheet (352).

5. An energy efficient injection molding machine as claimed in claim 3 or 4, wherein: the middle part of sheltering from piece (352) is formed with portion of hanging down (3521), be equipped with first counter weight post (3522) on the portion of hanging down (3521), the both ends of first counter weight post (3522) all are fixed with limiting plate (3523), two the both sides of sheltering from piece (352) are located respectively to limiting plate (3523).

6. An energy efficient injection molding machine as claimed in claim 5, wherein: a second counterweight column (3524) is fixed between the two limiting plates (3523), a through hole (3525) is formed among the first counterweight column (3522), the limiting plate (3523) and the second counterweight column (3524), and the shielding piece (352) penetrates through the through hole (3525).

7. An energy efficient injection molding machine as defined in claim 1 wherein: injection device (2) including injection frame (21), locate injection mechanism (25) of injection frame (21) upside, be fixed in lifter (22) at injection mechanism (25) both ends, be fixed in injection frame (21) upside and locate first backup pad (23) and at least one of lifter (22) both ends and locate injection frame (21) and order about actuating mechanism (24) that lifter (22) go up and down, be equipped with on first backup pad (23) and wear to establish the hole of sliding (231) that slides that supply the one end of lifter (22) to wear to establish.

8. An energy efficient injection molding machine as defined in claim 7 wherein: the number of the driving mechanisms (24) is at least one, each driving mechanism (24) comprises at least two first screw rod lifters (241) which are respectively arranged on the lower sides of the two lifting rods (22) and a first driving motor (242) which is fixed on the injection rack (21) and drives the worm of each first screw rod lifter (241) to rotate, and the upper ends of the screw rods of the first screw rod lifters (241) are fixed with the lifting rods (22).

9. An energy efficient injection molding machine as defined in claim 7 wherein: the injection mechanism (25) comprises an extrusion cylinder (252), an extrusion screw (253) rotationally connected in the extrusion cylinder (252), a rotating motor fixed at one end of the extrusion cylinder (252) and driving the extrusion screw (253) to rotate, an injection nozzle (254) fixedly connected at the other end of the extrusion cylinder (252), a material tip (255) in threaded connection with one end of the extrusion screw (253) close to the injection nozzle (254), a non-return ring (256) sleeved on one side of the material tip (255) close to the extrusion screw (253) and a thrust ring (257) sleeved on one side of the material tip (255) close to the extrusion screw (253), wherein one end of the material tip (255) close to the injection nozzle (254) extends out of the extrusion cylinder (252), and the outer side wall of one end of the material tip (255) close to the injection nozzle (254) is provided with at least one clamping groove (2551).

10. An energy efficient injection molding machine as defined in claim 1 wherein: the die comprises a fixed die plate (33), a balance mechanism (37) arranged on two sides of the fixed die plate (35), the balance mechanism (37) comprises at least one first balance rod (371) with one end hinged to the fixed die plate (33) and a second balance rod (372) with one end fixed to one end of the first balance rod (372) and the other end higher than the upper surface of the fixed die plate (35), two sides of the fixed die plate (33) are both fixed with an extending plate (354), and the other end of the first balance rod (371) abuts against the lower side of one extending plate (354);

when an upper die and a lower die on the lower die fixing plate (35) are contacted, the other end of the second balance rod (372) is abutted to the movable die plate (32).