CN111376449B

CN111376449B - Injection mold with adjustable mold opening stroke and injection molding method thereof

Info

Publication number: CN111376449B
Application number: CN202010225248.3A
Authority: CN
Inventors: 林冰莺
Original assignee: Taizhou Suke Technology Co ltd
Current assignee: Taizhou Suke Technology Co.,Ltd.
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2021-11-19
Anticipated expiration: 2040-03-26
Also published as: CN111376449A

Abstract

The invention discloses an injection mold with an adjustable mold opening stroke, which comprises an upper mold plate, a lower mold plate, a movable fixture block and a positioning guide rod, wherein the upper mold plate is fixedly arranged on the outer surface of the upper end of the lower mold plate, a mold cavity bottom plate is arranged in the middle of the inner side of the upper part of the lower mold plate, the movable fixture block is fixedly arranged on one side, close to the mold cavity bottom plate, of the upper part of the lower mold plate, a second fixed block is fixedly arranged on the other side, close to the mold cavity bottom plate, of the upper part of the lower mold plate, a splicing fixture block is fixedly arranged on the inner side of the upper part of the lower mold plate, close to the front part of the mold cavity bottom plate, and a first fixed block is fixedly arranged on the inner side of the upper part of the lower mold plate, close to the rear part of the mold cavity bottom plate; according to the injection mold with the adjustable mold opening stroke, the injection mold with the adjustable mold opening stroke is provided with the longitudinal and transverse adjusting structures, so that the flexibility of the injection mold in use is improved, meanwhile, the injection mold is provided with the auxiliary ejection structure, the discharging operation is more convenient and faster, and the working efficiency is improved.

Description

Injection mold with adjustable mold opening stroke and injection molding method thereof

Technical Field

The invention belongs to the technical field of injection molds, and particularly relates to an injection mold with an adjustable mold opening stroke.

Background

The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate dimensions, and the injection molding is a processing method used for batch production of parts with complex shapes, in particular to a method for injecting heated and melted plastics into a mold cavity from an injection molding machine at high pressure and obtaining a formed product after cooling and solidification.

A comparative document CN209079079U discloses an injection mold, comprising: the injection mold comprises an injection mold front mold and an injection mold rear mold, wherein the injection mold front mold is used for being attached to the injection mold rear mold. The front mold of the injection mold comprises a front mold fixing plate, a positioning ring, a rubber inlet, a front mold base plate and a flow channel, wherein the positioning ring is arranged on the front mold fixing plate, the rubber inlet is communicated with the positioning ring, and the front mold base plate is arranged on the front mold fixing plate. The utility model discloses an injection mold, through the injection mold front mould and the injection mold back mould that set up, the cooperation forms the mould molding chamber jointly behind injection mold front mould and the injection mold, inject into the plastics melt, form the product after the cooling setting, at the in-process of the plastics melt of moulding plastics, through in the fluid flow process, set up the buffering in order to change the velocity of flow of plastics melt, thereby reduce the plastics melt and produce the phenomenon of stamp mark to the product, compare with the invention, it does not have the auxiliary regulation structure, thereby the flexibility ratio when having reduced its use.

The existing injection mold with the adjustable mold opening stroke has certain defects in the using process, and the traditional injection mold with the adjustable mold opening stroke adopts an integrated fixed structure design, so that the traditional injection mold cannot adjust the injection thickness of the traditional injection mold according to production parameters, the traditional injection mold cannot process plastic finished products with any thickness, and the flexibility of the injection mold in the using process is reduced; secondly, the traditional injection mold with the adjustable mold opening stroke does not have a width adjusting structure, so that a user cannot adjust the width parameter of the injection mold during injection molding operation according to the use requirement, and the application range of the injection mold is reduced; meanwhile, the traditional injection mold with the adjustable mold opening stroke does not have an auxiliary ejection structure, so that a user can take out a plastic finished product in the mold only by disassembling the mold, the working efficiency of the injection mold is reduced, and certain adverse effects are brought to the user.

Disclosure of Invention

In order to overcome the defect that the traditional injection mold with adjustable mold opening stroke adopts an integrated fixed structure design, so that the traditional injection mold cannot adjust the injection thickness of the traditional injection mold according to production parameters, the traditional injection mold cannot process plastic finished products with any thickness, and the flexibility of the injection mold in use is reduced; secondly, the traditional injection mold with the adjustable mold opening stroke does not have a width adjusting structure, so that a user cannot adjust the width parameter of the injection mold during injection molding operation according to the use requirement, and the application range of the injection mold is reduced; meanwhile, the traditional injection mold with the adjustable mold opening stroke does not have an auxiliary ejection structure, so that a user can take out a plastic finished product in the mold only by disassembling the mold, the working efficiency is reduced, and the injection mold with the adjustable mold opening stroke is provided.

The purpose of the invention is realized by the following technical scheme:

an injection mold with adjustable mold opening stroke comprises an upper mold plate, a lower mold plate, a movable fixture block and a positioning guide rod, wherein the upper mold plate is fixedly arranged on the outer surface of the upper end of the lower mold plate, a mold cavity bottom plate is arranged at the middle position of the inner side of the upper portion of the lower mold plate, the movable fixture block is fixedly arranged at one side, close to the mold cavity bottom plate, of the upper portion of the lower mold plate, a second fixed block is fixedly arranged at the other side, close to the mold cavity bottom plate, of the upper portion of the lower mold plate, a splicing fixture block is fixedly arranged at the front portion, close to the mold cavity bottom plate, of the inner side of the upper portion of the lower mold plate, a first fixed block is fixedly arranged at the rear portion, close to the mold cavity bottom plate, a fixed transverse plate is fixedly arranged on the outer surface of the side edge of the lower mold plate, a butt joint screw rod is movably sleeved at the middle position of the inner side of the fixed transverse plate, a driving turntable is fixedly arranged on the outer surface of one end of the butt joint screw rod, and a lifting bottom plate is movably arranged at the bottom of the movable fixture block, the movable fixture block is movably connected with the lifting bottom plate through the inner sleeve fixture block, a movable side plate is movably sleeved on the outer surface of one side of the movable fixture block, a threaded cap is fixedly mounted on the outer surface of the other side of the movable fixture block, the movable fixture block is movably abutted with the abutting screw through the threaded cap, the positioning guide rod is fixedly sleeved on the inner sides of the upper template and the lower template, and a fixed top plate is fixedly mounted on the outer surface of the upper end of the upper template.

As a further scheme of the invention, two groups of fixing bolts are fixedly installed at the bottoms of the first fixing block and the second fixing block, the first fixing block and the second fixing block are fixedly connected with the lower template through the fixing bolts in a butt joint mode, two groups of sliding trundles are movably sleeved on the inner side of the bottom of the lifting bottom plate, the lower template and the splicing fixture block are fixedly connected with each other through the clamping groove in a butt joint mode, the lower template and the fixing transverse plate are fixedly connected with each other through the bolts in a butt joint mode, and two groups of spring pins are fixedly installed between the inner sleeve fixture block and the moving fixture block.

As a further scheme of the invention, a hydraulic stay bar is fixedly installed at the middle position of the outer surface of the lower end of the die cavity bottom plate, a fixed chassis is fixedly installed on the outer surface of the bottom of the hydraulic stay bar, a second supporting plate is fixedly installed at one side of the lower part of the lower template close to the hydraulic stay bar, a first supporting plate is fixedly installed at the other side of the lower part of the lower template close to the hydraulic stay bar, butt-joint bases are fixedly installed on the outer surfaces of the lower ends of the first supporting plate and the second supporting plate, and the hydraulic stay bar and the butt-joint bases are fixedly butted through the fixed chassis.

As a further scheme of the invention, the outer surface of the upper end of the fixed top plate is fixedly provided with the heating tank, the outer surface of the top of the heating tank is fixedly provided with the electric heating machine, the inner side of the front part of the heating tank is movably provided with the flow control valve, the electric heating machine is fixedly arranged in the middle of the outer surface of the upper end of the heating tank, and one side of the inner surface of the upper end of the heating tank, which is close to the electric heating machine, is provided with the material injection round hole.

As a further scheme of the invention, circular notches are formed in the inner side inner surfaces of the upper template, the lower template and the fixed top plate in a penetrating mode, an arc-shaped top head is fixedly installed on the outer surface of one end of the positioning guide rod, a fixed stop ring is movably installed on the outer surface of the side edge of the positioning guide rod, the positioning guide rod and the fixed stop ring are fixedly connected in a butt joint mode through a spring sleeve, and a thread groove is formed in the upper portion, close to the arc-shaped top head, of the outer surface of the side edge of the positioning guide rod.

As a further scheme of the invention, a square notch is formed in the inner side inner surface of the first fixed block in a penetrating manner, a butt joint sleeve rod is movably sleeved on the inner side of the first fixed block, the first fixed block and the butt joint sleeve rod are movably connected through the square notch, a movable push block is fixedly arranged on the outer surface of one end of the butt joint sleeve rod, and a push-pull plate is fixedly arranged on the outer surface of the other end of the butt joint sleeve rod.

As a further scheme of the invention, a material injection groove is formed in the middle position of the inner side of the upper part of the fixed top plate, second fixing buckles are fixedly arranged in the middle positions of the outer surfaces of the front ends of the upper template and the lower template, and two groups of first fixing buckles are fixedly arranged on the two sides of the outer surfaces of the front ends of the upper template and the lower template close to the second fixing buckles.

As a further scheme of the invention, the movable fixture block is movably connected with the movable side plate through a buckle, the interior of the movable fixture block is of a hollow structure, and a rubber pad is fixedly arranged on the outer surface of the bottom of the butt joint base.

In a further aspect of the invention, the inner surfaces of the first supporting plate and the second supporting plate are respectively provided with a bolt groove, and the first supporting plate, the second supporting plate and the butt joint base are fixedly butted through bolts.

An injection molding method of an injection mold with an adjustable mold opening stroke comprises the following specific using operation steps:

injecting a plastic raw material into a heating tank by using a material injection circular hole of the heating tank, heating the plastic raw material by using an electric motor to keep the plastic raw material in a liquid state in the heating tank, clamping an upper template on a lower template, simultaneously placing a fixed top plate on the upper template, and inserting a positioning guide rod among the lower template, the upper template and the fixed top plate by using a circular notch and matching with an arc-shaped top head of the positioning guide rod;

step two, according to the die sinking stroke parameter, the butt joint screw rod is driven by rotating the driving turntable, so that the butt joint screw rod is matched with the thread cap of the movable fixture block, the movable fixture block is pushed to transversely move on the die cavity bottom plate, the distance between the movable fixture block and the second fixed block is adjusted, meanwhile, the die cavity bottom plate is jacked upwards by using the hydraulic support rod, the lifting bottom plate is enabled to move upwards under the action of the inner sleeve fixture block, and the distance between the die cavity bottom plate and the upper die plate is adjusted;

and step three, injecting the liquid plastic raw material in the heating tank between the upper template and the lower template through the injection groove by rotating the flow control valve, taking down the splicing fixture block by utilizing a clamping groove between the splicing fixture block and the lower template after the liquid plastic raw material is cooled to be solid on the die cavity bottom plate, and horizontally moving the movable pushing block at the other end of the butt joint sleeve rod by pushing the push-pull plate at one end of the butt joint sleeve rod so as to take out the plastic product formed on the die cavity bottom plate.

The invention has the beneficial effects that:

1. through setting up die cavity bottom plate and hydraulic pressure vaulting pole, when the user need utilize this injection mold to produce the plastic products of different thickness, the user can utilize hydraulic pressure mode jack-up die cavity bottom plate upwards through the hydraulic pressure vaulting pole, make lifting plate rebound under the effect of endotheca fixture block, the removal of cooperation lifting plate, adjust the interval between die cavity bottom plate and the cope match-plate pattern, make the plastic products of different thickness can be processed out between die cavity bottom plate and the cope match-plate pattern, utilize the setting of die cavity bottom plate and hydraulic pressure vaulting pole, can carry out fore-and-aft position control operation to the die cavity bottom plate, thereby play the regulating action to this injection mold's the thickness of moulding plastics, make it can process out the plastic products of different thickness, adjust its die sinking stroke, flexibility when promoting its use.

2. By arranging the movable clamping block and the driving turntable, when a user needs to utilize the injection mold to produce plastic products with different widths, the user can drive the butt joint screw to rotate by rotating the driving turntable, so that the butt joint screw is matched with the thread cap of the movable clamping block, the thread structure between the thread cap and the butt joint screw is used for pushing the movable clamping block to transversely move on the die groove bottom plate, meanwhile, two groups of sliding trundles at the bottom of the movable clamping block are utilized to reduce the friction force when the movable clamping block transversely moves, the distance between the movable clamping block and the second fixing block is adjusted by transversely moving the movable clamping block, so that the injection width parameter of the injection mold is adjusted, then the movable clamping block can be matched with the die groove bottom plate to perform longitudinal position adjustment operation by utilizing the arrangement of the lifting bottom plate, so that the injection mold can simultaneously perform transverse and longitudinal injection parameter adjustment operation, by means of the arrangement of the movable clamping block and the driving turntable, plastic products with different widths can be processed by the injection mold with the adjustable mold opening stroke, and the application range of the injection mold is widened.

3. Through setting up removal ejector pad and push-and-pull plate, after plastic products cooled forming on the die cavity bottom plate, utilize the draw-in groove between concatenation fixture block and the lower bolster to take off the concatenation fixture block, the user is through promoting the push-and-pull plate of butt joint loop bar one end, make the removal ejector pad translation of butt joint loop bar drive its other end, utilize the contact between removal ejector pad and the plastic products, can be when removing the ejector pad translation, take out the plastic products after the shaping on the die cavity bottom plate, thereby under the condition of not dismantling injection mold, accomplish the operation of taking out to plastic products, utilize the setting of removing ejector pad and push-and-pull plate, make this injection mold of die sinking stroke adjustable have supplementary ejecting structure, promote its work efficiency.

4. Through setting up the arc top, when the user inserts the circular notch of fixed roof with the positioning guide arm, utilize the arc top of positioning guide arm, can reduce its resistance when the positioning guide arm inserts, make its insertion operation more smooth, avoid it to appear the dislocation phenomenon, utilize the fixed fender ring of spring housing cooperation simultaneously, can when the positioning guide arm inserts between cope match-plate pattern and the lower bolster, utilize the supplementary fixed cope match-plate pattern of elasticity and the lower bolster of spring housing, avoid appearing not hard up phenomenon between cope match-plate pattern and the lower bolster, utilize the setting of arc top cooperation spring housing, can make this injection mold's butt joint operation more firm, avoid it to appear not hard up phenomenon.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of an overall structure of an injection mold with an adjustable mold opening stroke according to the present invention.

FIG. 2 is an internal structure view of an injection mold with adjustable mold opening stroke according to the present invention.

Fig. 3 is an exploded view of the injection mold with adjustable mold opening stroke according to the present invention.

FIG. 4 is an internal structure view of a movable fixture block of the injection mold with adjustable mold opening stroke according to the present invention.

FIG. 5 is an overall structure view of a cavity bottom plate of an injection mold with adjustable mold opening stroke according to the present invention.

FIG. 6 is an overall structure view of the positioning guide rod of the injection mold with adjustable mold opening stroke according to the present invention.

FIG. 7 is a general structural diagram of a movable push block of an injection mold with adjustable mold opening stroke according to the present invention: 1. a hydraulic stay bar; 2. fixing the chassis; 3. butting a base; 4. a first supporting plate; 5. driving the turntable; 6. fixing the transverse plate; 7. mounting a template; 8. fixing a top plate; 9. a flow control valve; 10. an electric heat engine; 11. heating the tank; 12. positioning the guide rod; 13. a first fixing buckle; 14. a second fixing buckle; 15. a second supporting plate; 16. a lower template; 17. butting a screw rod; 18. moving the fixture block; 19. a first fixed block; 20. a chase bottom plate; 21. a second fixed block; 22. splicing the fixture blocks; 23. a circular notch; 24. a material injection groove; 25. a sliding caster; 26. an inner sleeve fixture block; 27. a lifting bottom plate; 28. a threaded cap; 29. fixing the bolt; 30. a spring pin; 31. an arc-shaped plug; 32. a thread groove; 33. fixing the baffle ring; 34. a spring housing; 35. moving the push block; 36. a push-pull plate; 37. butting the loop bars; 38. moving the side plate; 39. a square notch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-7, an injection mold with adjustable mold opening stroke comprises an upper mold plate 7, a lower mold plate 16, a movable fixture block 18 and a positioning guide rod 12, wherein the upper mold plate 7 is fixedly installed on the outer surface of the upper end of the lower mold plate 16, a mold cavity bottom plate 20 is arranged at the middle position of the inner side of the upper portion of the lower mold plate 16, the movable fixture block 18 is fixedly installed at one side, close to the mold cavity bottom plate 20, of the upper portion of the lower mold plate 16, a second fixture block 21 is fixedly installed at the other side, close to the mold cavity bottom plate 20, of the upper portion of the lower mold plate 16, a splicing fixture block 22 is fixedly installed at the front portion, close to the mold cavity bottom plate 20, of the inner side of the upper portion of the lower mold plate 16, a first fixture block 19 is fixedly installed at the rear portion, close to the mold cavity bottom plate 20, a fixed transverse plate 6 is fixedly installed on the outer surface of the side of the lower mold plate 16, a butt joint screw 17 is movably sleeved at the middle position of the inner side of the fixed transverse plate 6, and a driving turntable 5 is fixedly installed on the outer surface of one end of the butt joint screw 17, the bottom of the movable fixture block 18 is movably provided with a lifting bottom plate 27, the movable fixture block 18 is movably connected with the lifting bottom plate 27 through an inner sleeve fixture block 26, the outer surface of one side of the movable fixture block 18 is movably sleeved with a movable side plate 38, the outer surface of the other side of the movable fixture block 18 is fixedly provided with a threaded cap 28, the movable fixture block 18 is movably abutted with the abutting screw 17 through the threaded cap 28, the positioning guide rod 12 is fixedly sleeved on the inner sides of the upper template 7 and the lower template 16, the outer surface of the upper end of the upper template 7 is fixedly provided with a fixed top plate 8, the positioning guide rod 12 can be used for fixing the upper template 7 and the lower template 16, and the phenomenon of dislocation is avoided.

The bottom of first fixed block 19 and second fixed block 21 is equal fixed mounting has two sets of fixing bolt 29, first fixed block 19 and second fixed block 21 are all through fixing bolt 29 and lower bolster 16 butt joint fixed, two sets of caster 25 that slide have been cup jointed in the inboard activity in bottom of lifting bottom plate 27, utilize caster 25 to reduce the frictional force when lifting bottom plate 27 removes, it is fixed through the draw-in groove butt joint between lower bolster 16 and the concatenation fixture block 22, it is fixed through the bolt butt joint between lower bolster 16 and the fixed diaphragm 6, fixed mounting has two sets of spring pins 30 between endotheca fixture block 26 and the removal fixture block 18, utilize spring pin 30 can play the elasticity reset effect to endotheca fixture block 26.

The lower extreme surface middle part fixed mounting of die cavity bottom plate 20 has hydraulic pressure vaulting pole 1, and the bottom surface fixed mounting of hydraulic pressure vaulting pole 1 has fixed chassis 2, one side fixed mounting that the lower part of lower bolster 16 is close to hydraulic pressure vaulting pole 1 has second fagging 15, and the lower part of lower bolster 16 is close to hydraulic pressure vaulting pole 1's opposite side fixed mounting has first fagging 4, the equal fixed mounting of lower extreme surface of first fagging 4 and second fagging 15 has butt joint base 3, it is fixed to dock through fixed chassis 2 between hydraulic pressure vaulting pole 1 and the butt joint base 3.

The upper end surface fixed mounting of roof 8 has heating jar 11, utilize heating jar 11 can be so that avoid plastic raw materials solidification phenomenon to appear before moulding plastics, and the top surface fixed mounting who heats jar 11 has electric heat engine 10, the anterior inboard movable mounting who heats jar 11 has accuse stream valve 9, the upper end surface middle part fixed mounting who heats jar 11 has electric heat engine 10, and the upper end internal surface that heats jar 11 has seted up near one side of electric heat engine 10 and has annotated the material round hole.

Cope match-plate pattern 7, circular notch 23 has all been seted up to the inboard internal surface of lower bolster 16 and fixed roof 8 through running through, the one end external surface fixed mounting of positioning guide 12 has arc top 31, positioning guide 12's side surface movable mounting has fixed fender ring 33, it is fixed to connect through spring housing 34 between positioning guide 12 and the fixed fender ring 33, the upper portion that positioning guide 12's side surface is close to arc top 31 is equipped with thread groove 32, utilize spring housing 34 can play supplementary fixed effect to the installation of cope match-plate pattern 7 and lower bolster 16, avoid it to appear not hard up phenomenon.

The inner side inner surface of the first fixing block 19 is provided with a square notch 39 in a penetrating mode, the inner side of the first fixing block 19 is movably sleeved with a butt joint sleeve rod 37, the first fixing block 19 is movably connected with the butt joint sleeve rod 37 through the square notch 39, a movable push block 35 is fixedly arranged on the outer surface of one end of the butt joint sleeve rod 37, a processed plastic product can be ejected out through the movable push block 35, and a push-pull plate 36 is fixedly arranged on the outer surface of the other end of the butt joint sleeve rod 37.

The material injection groove 24 is formed in the middle of the inner side of the upper portion of the fixed top plate 8, the second fixing buckle 14 is fixedly mounted in the middle of the outer surface of the front end of the upper template 7 and the lower template 16, and two sets of first fixing buckles 13 are fixedly mounted on the outer surfaces of the front end of the upper template 7 and the lower template 16 close to the two sides of the second fixing buckle 14.

The movable clamping block 18 is movably connected with the movable side plate 38 through a buckle, the interior of the movable clamping block 18 is of a hollow structure, a rubber pad is fixedly mounted on the outer surface of the bottom of the butt joint base 3, and the butt joint base 3 can be more firmly mounted through the rubber pad.

The inboard internal surface of first fagging 4 and second fagging 15 all is equipped with the bolt groove, and all through the bolt butt joint between first fagging 4, second fagging 15 and the butt joint base 3 fixed.

injecting a plastic raw material into a heating tank 11 by using a material injection circular hole of the heating tank 11, heating the plastic raw material by using an electric motor 10 to keep the plastic raw material in a liquid state in the heating tank 11, clamping an upper template 7 on a lower template 16, placing a fixed top plate 8 on the upper template 7, and inserting a positioning guide rod 12 among the lower template 16, the upper template 7 and the fixed top plate 8 by using a circular notch 23 and matching with an arc-shaped top head 31 of the positioning guide rod 12;

step two, according to the die sinking stroke parameter, the driving turntable 5 is rotated to drive the butt joint screw 17, so that the butt joint screw 17 is matched with the threaded cap 28 of the movable fixture block 18 to push the movable fixture block 18 to transversely move on the die cavity bottom plate 20, the distance between the movable fixture block 18 and the second fixed block 21 is adjusted, meanwhile, the hydraulic support rod 1 is utilized to upwards jack up the die cavity bottom plate 20, the lifting bottom plate 27 is enabled to upwards move under the action of the inner sleeve fixture block 26, and the distance between the die cavity bottom plate 20 and the upper die plate 7 is adjusted;

and step three, injecting the liquid plastic raw material in the heating tank 11 between the upper template 7 and the lower template 16 through the injection groove 24 by rotating the flow control valve 9, taking down the splicing fixture block 22 by utilizing a clamping groove between the splicing fixture block 22 and the lower template 16 after the liquid plastic raw material is cooled to be solid on the die cavity bottom plate 20, and horizontally moving the movable push block 35 at the other end of the splicing fixture rod 37 by pushing the push-pull plate 36 at one end of the splicing fixture rod 37, so that the plastic product formed on the die cavity bottom plate 20 is taken out.

The invention aims to provide an injection mold with adjustable mold opening stroke, which is characterized in that by arranging a mold cavity bottom plate 20 and a hydraulic support rod 1, when a user needs to use the injection mold to produce plastic products with different thicknesses, the user can jack up the mold cavity bottom plate 20 upwards in a hydraulic mode through the hydraulic support rods 1, so that the lifting bottom plate 27 moves upwards under the action of the inner sleeve fixture blocks 26, the distance between the mold cavity bottom plate 20 and the upper mold plate 7 is adjusted by matching with the movement of the lifting bottom plate 27, so that plastic products with different thicknesses can be processed between the die cavity bottom plate 20 and the upper die plate 7, the die cavity bottom plate 20 can be longitudinally adjusted by the arrangement of the die cavity bottom plate 20 and the hydraulic support rods 1, thereby having the function of adjusting the injection thickness of the injection mold, enabling the injection mold to process plastic products with different thicknesses and improving the flexibility of the injection mold in use;

by arranging the movable fixture block 18 and the driving turntable 5, when a user needs to use the injection mold to produce plastic products with different widths, the user can drive the docking screw 17 to rotate by rotating the driving turntable 5, so that the docking screw 17 is matched with the threaded cap 28 of the movable fixture block 18, the movable fixture block 18 is pushed to transversely move on the mold cavity bottom plate 20 by utilizing a threaded structure between the threaded cap 28 and the docking screw, meanwhile, the friction force generated when the movable fixture block 18 transversely moves can be reduced by utilizing two groups of sliding casters 25 at the bottom of the movable fixture block 18, the distance between the movable fixture block 18 and the second fixed block 21 is adjusted by transversely moving the movable fixture block 18, so that the injection width parameter of the injection mold is adjusted, and then the movable fixture block 18 can be matched with the mold cavity bottom plate 20 to perform longitudinal position adjustment operation by utilizing the lifting bottom plate 27, so that the injection mold can simultaneously perform transverse and longitudinal injection parameter adjustment operations, by means of the arrangement of the movable clamping block 18 and the driving turntable 5, plastic products with different widths can be processed by the injection mold with the adjustable mold opening stroke, and the application range of the injection mold is widened;

by arranging the movable push block 35 and the push-pull plate 36, after the plastic product is cooled and formed on the mold cavity bottom plate 20, the splicing fixture block 22 is taken down by utilizing a clamping groove between the splicing fixture block 22 and the lower mold plate 16, a user can take out the plastic product formed on the mold cavity bottom plate 20 by pushing the push-pull plate 36 at one end of the butting sleeve rod 37 through pushing the butting sleeve rod 37 to drive the movable push block 35 at the other end to translate by utilizing the contact between the movable push block 35 and the plastic product, so that the plastic product is taken out under the condition of not disassembling the injection mold, and the mold opening stroke-adjustable injection mold has an auxiliary ejection structure by utilizing the arrangement of the movable push block 35 and the push-pull plate 36, so that the work efficiency of the mold opening is improved;

through setting up arc top 31, when the user inserts positioning guide 12 into the circular notch 23 of fixed roof 8, utilize the arc top 31 of positioning guide 12, can reduce its resistance when positioning guide 12 inserts, make its insertion operation more smooth, avoid it to appear the dislocation phenomenon, utilize fixed fender ring 33 of spring housing 34 cooperation simultaneously, can when positioning guide 12 inserts between cope match-plate pattern 7 and the lower bolster 16, utilize the supplementary fixed cope match-plate pattern 7 of elasticity and the lower bolster 16 of spring housing 34, avoid appearing not hard up phenomenon between cope match-plate pattern 7 and the lower bolster 16, utilize the setting of arc top 31 cooperation spring housing 34, can make this injection mold's butt joint operation more firm, avoid it to appear not hard up phenomenon.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. Preferred embodiments are not exhaustive of all the details of the embodiments. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The injection mold with the adjustable mold opening stroke is characterized by comprising an upper mold plate (7), a lower mold plate (16), a movable fixture block (18) and a positioning guide rod (12), wherein the upper mold plate (7) is fixedly installed on the outer surface of the upper end of the lower mold plate (16), a mold cavity bottom plate (20) is arranged in the middle of the inner side of the upper portion of the lower mold plate (16), the movable fixture block (18) is fixedly installed on one side, close to the mold cavity bottom plate (20), of the upper portion of the lower mold plate (16), a second fixing block (21) is fixedly installed on the other side, close to the mold cavity bottom plate (20), of the upper portion of the lower mold plate (16), a splicing fixture block (22) is fixedly installed on the inner side of the upper portion, close to the mold cavity bottom plate (20), of the inner side of the upper portion of the lower mold plate (16), a first fixing block (19) is fixedly installed on the rear portion, close to the mold cavity bottom plate (20), a fixed transverse plate (6) is fixedly arranged on the outer surface of the side edge of the lower template (16), a butt joint screw rod (17) is movably sleeved at the middle position of the inner side of the fixed transverse plate (6), a driving turntable (5) is fixedly arranged on the outer surface of one end of the butt joint screw rod (17), a lifting bottom plate (27) is movably arranged at the bottom of the movable clamping block (18), the movable fixture block (18) is movably connected with the lifting bottom plate (27) through an inner sleeve fixture block (26), a movable side plate (38) is movably sleeved on the outer surface of one side of the movable clamping block (18), and a screw cap (28) is fixedly arranged on the outer surface of the other side of the movable clamping block (18), the movable fixture block (18) is movably butted with the butting screw rod (17) through a threaded cap (28), the positioning guide rod (12) is fixedly sleeved on the inner sides of the upper template (7) and the lower template (16), and a fixed top plate (8) is fixedly arranged on the outer surface of the upper end of the upper template (7).

2. The injection mold with the adjustable mold opening stroke as claimed in claim 1, wherein two sets of fixing bolts (29) are fixedly mounted at the bottoms of the first fixing block (19) and the second fixing block (21), the first fixing block (19) and the second fixing block (21) are fixedly butted with the lower template (16) through the fixing bolts (29), two sets of sliding casters (25) are movably sleeved on the inner side of the bottom of the lifting bottom plate (27), the lower template (16) and the splicing fixture blocks (22) are fixedly butted with each other through clamping grooves, the lower template (16) and the fixed transverse plate (6) are fixedly butted with each other through bolts, and two sets of spring pins (30) are fixedly mounted between the inner sleeve fixture blocks (26) and the movable fixture blocks (18).

3. The injection mold with the adjustable mold opening stroke as claimed in claim 2, wherein the middle of the outer surface of the lower end of the mold cavity bottom plate (20) is fixedly provided with a hydraulic stay bar (1), the outer surface of the bottom of the hydraulic stay bar (1) is fixedly provided with a fixing chassis (2), the lower portion of the lower mold plate (16) is fixedly provided with a second supporting plate (15) close to one side of the hydraulic stay bar (1), the lower portion of the lower mold plate (16) is fixedly provided with a first supporting plate (4) close to the other side of the hydraulic stay bar (1), the outer surfaces of the lower ends of the first supporting plate (4) and the second supporting plate (15) are fixedly provided with a docking base (3), and the hydraulic stay bar (1) and the docking base (3) are fixedly docked through the fixing chassis (2).

4. The injection mold with the adjustable mold opening stroke as claimed in claim 3, wherein a heating tank (11) is fixedly installed on the outer surface of the upper end of the fixed top plate (8), an electric heating machine (10) is fixedly installed on the outer surface of the top of the heating tank (11), a flow control valve (9) is movably installed on the inner side of the front portion of the heating tank (11), the electric heating machine (10) is fixedly installed in the middle position of the outer surface of the upper end of the heating tank (11), and a material injection round hole is formed in one side, close to the electric heating machine (10), of the inner surface of the upper end of the heating tank (11).

5. The injection mold with the adjustable mold opening stroke as claimed in claim 4, wherein the inner side inner surfaces of the upper mold plate (7), the lower mold plate (16) and the fixed top plate (8) are all provided with a circular notch (23) in a penetrating manner, the outer surface of one end of the positioning guide rod (12) is fixedly provided with an arc-shaped top head (31), the outer surface of the side of the positioning guide rod (12) is movably provided with a fixed baffle ring (33), the positioning guide rod (12) and the fixed baffle ring (33) are fixedly butted through a spring sleeve (34), and the outer surface of the side of the positioning guide rod (12) is provided with a thread groove (32) close to the upper part of the arc-shaped top head (31).

6. The injection mold with the adjustable mold opening stroke as claimed in claim 5, wherein a square notch (39) is formed in the inner side inner surface of the first fixing block (19) in a penetrating manner, a butt joint sleeve rod (37) is movably sleeved on the inner side of the first fixing block (19), the first fixing block (19) and the butt joint sleeve rod (37) are movably connected through the square notch (39), a movable push block (35) is fixedly installed on the outer surface of one end of the butt joint sleeve rod (37), and a push-pull plate (36) is fixedly installed on the outer surface of the other end of the butt joint sleeve rod (37).

7. The injection mold with the adjustable mold opening stroke as claimed in claim 6, wherein a material injection groove (24) is formed in the middle of the inner side of the upper portion of the fixed top plate (8), second fixing buckles (14) are fixedly mounted in the middle of the outer surfaces of the front ends of the upper mold plate (7) and the lower mold plate (16), and two groups of first fixing buckles (13) are fixedly mounted on two sides, close to the second fixing buckles (14), of the outer surfaces of the front ends of the upper mold plate (7) and the lower mold plate (16).

8. The injection mold with the adjustable mold opening stroke as claimed in claim 7, wherein the movable fixture block (18) is movably connected with the movable side plate (38) through a buckle, the movable fixture block (18) is hollow, and a rubber pad is fixedly mounted on the outer surface of the bottom of the butt joint base (3).

9. An injection mold with adjustable mold opening stroke according to claim 8, wherein the inner surfaces of the first supporting plate (4) and the second supporting plate (15) are provided with bolt grooves, and the first supporting plate (4), the second supporting plate (15) and the butt joint base (3) are fixed in a butt joint mode through bolts.

10. An injection molding method of an injection mold with adjustable mold opening stroke according to claim 9, characterized in that the method comprises the following specific operation steps:

injecting a plastic raw material into a heating tank (11) by using a material injection circular hole of the heating tank (11), heating the plastic raw material by using an electric motor (10) to keep the plastic raw material in a liquid state in the heating tank (11), clamping an upper template (7) on a lower template (16), simultaneously placing a fixed top plate (8) on the upper template (7), and inserting a positioning guide rod (12) among the lower template (16), the upper template (7) and the fixed top plate (8) by using a circular notch (23) and matching with an arc-shaped top head (31) of the positioning guide rod (12);

secondly, driving a butt joint screw rod (17) by rotating a driving turntable (5) according to the die sinking stroke parameter, enabling the butt joint screw rod (17) to be matched with a threaded cap (28) of a movable clamping block (18), pushing the movable clamping block (18) to transversely move on a die cavity bottom plate (20), adjusting the distance between the movable clamping block (18) and a second fixing block (21), simultaneously utilizing a hydraulic supporting rod (1) to upwards jack up the die cavity bottom plate (20), enabling a lifting bottom plate (27) to upwards move under the action of an inner sleeve clamping block (26), and adjusting the distance between the die cavity bottom plate (20) and an upper die plate (7);

and thirdly, injecting the liquid plastic raw material in the heating tank (11) between the upper template (7) and the lower template (16) through the material injection groove (24) by rotating the flow control valve (9), taking down the splicing fixture block (22) by utilizing a clamping groove between the splicing fixture block (22) and the lower template (16) after the liquid plastic raw material is cooled to be solid on the die groove bottom plate (20), and horizontally moving the movable push block (35) at the other end of the butting sleeve rod (37) by pushing the push-pull plate (36) at one end of the butting sleeve rod (37), so that the plastic product formed on the die groove bottom plate (20) is taken out.