CN113997512A

CN113997512A - Mould for injection moulding

Info

Publication number: CN113997512A
Application number: CN202111139645.XA
Authority: CN
Inventors: 白青霞; 李保艳; 岑欢
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-02-01

Abstract

The invention relates to the technical field of dies, in particular to a die for injection molding, which comprises a fixed die and a movable die which are matched with each other, wherein a fixed die plate, a feeding mechanism and a pouring pipeline are installed on the fixed die, a molding groove for molding a workpiece is formed in the fixed die, the movable die comprises an inner die and an outer die which is movably sleeved on the outer side of the inner die, a movable groove which is matched with the inner die is formed in the outer die, a plurality of thimbles are fixedly installed at one end of the inner die, one ends of the thimbles penetrate through the outer die, a plurality of thimble holes which are matched with the thimbles are uniformly formed in the outer die, and a sealing block is installed at one end of each thimble, which is far away from the inner die. According to the invention, one end of the thimble hole can be sealed by the sealing block after the thimble is contracted into the movable mold, so that the phenomenon that plastic fluid flows into the space between the thimble hole and the thimble in a large area during injection molding to cause the injection molding quality of the mold to be poor can be avoided, the molding quality of an injection molding piece is improved, and the processing quality of the mold for injection molding is improved.

Description

Mould for injection moulding

Technical Field

The invention relates to the technical field of molds, in particular to a mold for injection molding.

Background

Injection molding is a method for obtaining a molded product by stirring a completely molten plastic material through a screw at a certain temperature, injecting the completely molten plastic material into a mold cavity at high pressure, and cooling and solidifying the completely molten plastic material.

Through retrieval, chinese patent No. CN108973028A discloses an injection mold and an injection molding apparatus, the injection mold comprising: the fixed die assembly comprises a fixed die, and the fixed die is provided with a first cavity; the movable die assembly is matched with the fixed die assembly and comprises a movable die, the movable die is provided with a second cavity, and the second cavity is matched with the first cavity to form a die cavity for molding an injection product; the ejector pin is connected with the movable die and is used for ejecting the injection molding product out of the die cavity, and at least one ejector pin is arranged; the sealing gasket is connected with the movable die and used for sealing the thimble and the movable die, and the sealing gasket is made of elastic and telescopic materials.

Although the injection mold and the injection molding equipment can seal the ejector pin and the movable mold by using the sealing gasket to prevent the pressurized air in the mold cavity from leaking, the injection mold and the injection molding equipment still have the following defects: the thimble and the one end that the intercommunicating pore is close to the die cavity are in clearance fit with each other, and the thimble can abrade with the inner wall of the intercommunicating pore when moving in the intercommunicating pore and cause the clearance between the thimble and the intercommunicating pore to gradually increase, so that plastic fluid can flow into between the intercommunicating pore and the thimble in a large area during injection molding and cause the injection quality of the die to deteriorate.

Therefore, a mold for injection molding is proposed.

Disclosure of Invention

The present invention is directed to provide a mold for injection molding, in which a sealing block seals one end of an ejector pin hole after an ejector pin is retracted into a movable mold, so as to prevent a large area of plastic fluid from flowing between the ejector pin hole and the ejector pin during injection molding, thereby solving the problems in the related art.

In order to achieve the purpose, the invention provides the following technical scheme:

a mould for injection molding comprises a fixed mould and a movable mould which are matched with each other, wherein a fixed mould plate, a feeding mechanism and a pouring pipeline are installed on the fixed mould, a molding groove for molding a workpiece is arranged on the fixed mould, the movable mould comprises an inner mould and an outer mould which is movably sleeved on the outer side of the inner mould, a movable groove which is matched with the inner mould is formed in the outer mould, a plurality of thimbles are fixedly installed at one end of the inner mould, one ends of the thimbles penetrate through the outer mould, a plurality of thimble holes which are matched with the thimbles are evenly formed in the outer mould, a sealing block is installed at one end, away from the inner mould, of each thimble, a sealing groove which is matched with the sealing block is formed in the inner side wall of one end of each thimble hole, a fixed plate is arranged at one side, two fixed blocks are symmetrically installed on the top wall and the bottom wall of the outer mould, and two air cylinders are symmetrically installed on the outer side wall, close to one side of the fixed block, of the fixed plate, the output ends of the two cylinders are respectively provided with a first piston rod, one ends of the two first piston rods are respectively fixedly connected to the two fixed blocks, one side of each fixed plate is fixedly provided with a positioning plate which is matched with the inner mold and the outer mold, one end of the inner mold, which is close to the positioning plate, is provided with a plurality of fixed rods, one ends of the fixed rods penetrate through the positioning plate, one ends, which are far away from the inner mold, of the fixed rods are jointly provided with a limiting plate, a fixing mechanism is arranged between the inner mold and the outer mold, a discharging point for pushing a workpiece from the outer mold is arranged between the fixed mold and the positioning plate, the outer mold is positioned at the discharging point and is fixedly connected with the inner mold when being close to the fixed mold, the inner mold and the outer mold are separated from each other when being positioned at the discharging point and being far away from the fixed mold, a positioning assembly for fixing the inner mold and the outer mold is fixedly connected with the positioning plate when being separated from the outer mold, the fixed mounting has limiting slide block on the inside wall of external mold, set up the spacing spout of mutually supporting with limiting slide block on the centre form, be equipped with supplementary subassembly of unloading on the cover half, and supplementary subassembly of unloading is driven by the cylinder, be connected with on the external mold and paste the external mold and tightly compress tightly the subassembly to on the cover half.

The two cylinders are started simultaneously to drive the two first piston rods to jointly drive the fixed block and the outer mold to horizontally move, the fixed mechanism fixedly connects the inner mold and the outer mold when the outer mold is located at a discharging point and approaches the fixed mold, the two first piston rods jointly drive the fixed block, the outer mold and the inner mold to move at the moment and insert the movable mold into a corresponding molding groove in the fixed mold, and the pressing assembly can tightly attach the movable mold to the fixed mold during injection molding, so that the sealing performance and the stability of connection of the movable mold and the fixed mold are improved, and the injection molding quality of a workpiece is improved; after injection molding, the two first piston rods jointly drive the fixed block, the outer mold and the inner mold to move and move the movable mold out of the molding groove, when the movable mold is moved out of the molding groove, the auxiliary discharging assembly can push a molded workpiece in the molding groove to cling to the movable mold and move to the outer sides of the molding groove and the fixed mold along with the movable mold, the outer mold is positioned at a discharging point, when the outer mold is far away from the fixed mold, the inner mold and the outer mold are separated from each other, one end of the inner mold clings to the positioning plate, the outer mold can move relative to the inner mold, the thimble and the sealing block, after the outer mold continuously moves to be in contact with the positioning plate, the thimble and the sealing block can push down the molded workpiece clinging to the outer mold and automatically discharge the molded workpiece, then when the outer mold approaches to the fixed mold and moves to the discharging point, the fixing mechanism fixedly connects the inner mold and the outer mold again, then the outer mold continuously approaches to the fixed mold, and the movable mold can be inserted into the corresponding molding groove in the fixed mold to perform injection molding, the injection molding and the automatic discharging of the workpiece can be conveniently completed only by controlling the opening and closing of the cylinder, the operation is convenient, and the use convenience of the injection molding die is improved.

Preferably, fixed establishment includes two movable blocks of symmetry elasticity installation in the external mold, the symmetry sets up two mounting grooves of mutually supporting with the movable block in the external mold, two the movable block is close to equal fixed mounting on the lateral wall of centre form one side has a plurality of inserted bars, and the one end of inserted bar all runs through the inside wall of mounting groove and extends to the outside of external mold, two all install the first electro-magnet that attracts movable block and inserted bar to keep away from the centre form on the inside wall of mounting groove, evenly set up a plurality ofly on the lateral wall of centre form and the jack of mutually supporting of inserted bar, and inserted bar and jack one-to-one, two all be connected with control assembly on the first electro-magnet, the external mold is located first electro-magnet outage when unloading point and external mold are close to the cover half, first electro-magnet circular telegram when the external mold is located unloading point and external mold and keeps away from the cover half.

The movable block is elastically connected in the mounting groove through a spring, the first electromagnet is powered off when the outer die is positioned at a discharging point and approaches the fixed die, the spring can push the movable block and the inserted rod to move towards the inner die and insert one end of the inserted rod into a corresponding jack on the inner die after the first electromagnet is powered off, so that the inner die and the outer die can be fixedly connected together, the inner die can be driven to move when the outer die approaches the fixed die, the first electromagnet is powered on when the outer die is positioned at the discharging point and leaves away from the fixed die, the movable block and the inserted rod can be attracted to leave away from the inner die after the first electromagnet is powered on, a formed workpiece can be pushed down from the outer die by moving relative to the inner die, the ejector pin and the sealing block when the outer die leaves away from the fixed die, the inner die and the outer die can be conveniently fixedly connected or the inner die and the outer die can be separated, the use is convenient, and the connection stability is good when the inner die and the outer die are connected, thereby promoted fixed establishment and injection moulding with mould job stabilization nature, excellent in use effect.

Preferably, two the control assembly all includes the installation piece of fixed mounting on the locating plate lateral wall, two all run through to insert on the installation piece and be equipped with the installation pole, two the first joint is all installed, two to the one end that the installation pole is close to the external mold all around being equipped with reset spring on the lateral wall of installation pole, and reset spring's both ends are connected respectively on installation piece and first joint, the external mold is close to the one end symmetry of locating plate and installs two second joints of mutually supporting with first joint, and two second joints electric connection respectively on two first electro-magnets, two all install the guide bar that runs through the installation piece setting on the first joint, two all be connected with the connecting wire on the first joint, and the connecting wire all runs through the guide bar setting, two connecting wire electric connection respectively is on two cylinders.

When the two cylinders drive the outer die to move to a discharging point together, one end of the inner die is attached to the positioning plate, the reset spring pushes the first connector to be just contacted with the second connector on the outer die due to the restoration of the self elasticity, the first connector is separated from the second connector when the outer die is positioned at the discharging point and approaches the fixed die, the first electromagnet is powered off and the inner die is fixedly connected with the outer die, when the outer die is positioned at the discharging point and leaves away the fixed die, the outer die and the second connector push the first connector and the mounting rod to approach the positioning plate and keep the first connector contacted with the second connector, the first electromagnet is continuously powered on and the inner die is continuously separated, the inner die can be fixedly connected with the outer die or the inner die is separated from the outer die automatically by controlling the outer die to move through the cylinders, manual adjustment is not needed, the automation degree is high, the working stability is good, and the working stability of the injection molding die is improved, the convenience of using the mold for injection molding is also improved.

Preferably, the positioning assembly comprises a second electromagnet fixedly mounted on the positioning plate, and the second electromagnet is electrically connected to the connecting wire.

One end of the inner die is attached to the positioning plate, the first connector is in contact with the second connector, the connecting wire and the second electromagnet are powered on, the inner die is tightly fixed on the positioning plate after the second electromagnet is powered on, and therefore the inner die can be prevented from sliding and shifting when the outer side of the inner die moves, the inner die and the outer die are conveniently and fixedly connected, the moving stability of the movable die is improved, and the working stability of the injection molding die is improved.

Preferably, supplementary subassembly of unloading includes the first cylinder body of fixed mounting on the fixed die plate roof, movable mounting has first piston in the first cylinder body, the second piston rod is installed to the one end of first piston, and the one end of second piston rod extends to the outside and fixed connection of first cylinder body on the fixed block, exhaust tube and blast pipe are installed to the one end that first cylinder body is close to the fixed block, all install the check valve in exhaust tube and the blast pipe, the one end of blast pipe is connected with annular installation pipe, and annular installation pipe fixes on the fixed die plate, evenly install a plurality of tympanites on the annular installation pipe, and the one end of tympanites all extends to the shaping inslot, the one end of tympanites all flushes with the inside wall of shaping inslot, and the one end that the tympanites is close to the shaping groove all installs the check valve.

The cylinder drives the first piston rod to push the fixed block and the outer mold to move, the second piston rod and the first piston move along with the fixed block, the outer mold, the second piston rod and the first piston suck gas into the first cylinder body through the exhaust pipe when approaching the fixed mold, the outer mold after injection molding, the second piston rod and the first piston can spray the gas in the first cylinder body through the exhaust pipe when moving away from the fixed mold, the annular installation pipe and the exhaust pipe, the sprayed gas can push a molding workpiece in the molding groove to be tightly attached to the outer mold and move to the outer side of the molding groove along with the outer mold, so that the molding workpiece can be prevented from being clamped in the molding groove after injection molding, the unloading stability is improved, and the working stability of the mold for injection molding is further improved.

Preferably, the compressing assembly comprises a plurality of second cylinder bodies fixedly mounted on the fixing plate, each second cylinder body is internally and movably provided with a second piston, each second piston rod is mounted on each second piston, one end of each third piston rod is fixedly connected to the fixing block, each oil pipe is connected to one end, far away from the fixing block, of each second cylinder body, and each electromagnetic valve electrically connected to the air cylinder is mounted at one end, close to the second cylinder body, of each oil pipe.

The cylinder drives the first piston rod to push the fixed block and the outer die to move, the third piston rod and the second piston move along with the fixed block, when the third piston rod and the second piston approach the fixed die, hydraulic oil can be sucked into the second cylinder body through the oil pipe, the outer die drives the inner die to be attached to the fixed die, and when the cylinder is powered off, the electromagnetic valve is closed along with the power off and seals the hydraulic oil in the second cylinder body.

Compared with the prior art, the invention has the beneficial effects that:

1. the thimble contracts back sealing block can seal the one end of thimble hole in the movable mould to plastic fluid large tracts of land flows into between thimble hole and the thimble and leads to the quality of moulding plastics of mould to worsen when can avoiding injection moulding, has improved the shaping quality of injection molding, thereby has promoted the processingquality of mould for injection moulding.

2. The inner mold and the outer mold can be automatically and fixedly connected or separated by controlling the outer mold to move through the air cylinder, manual adjustment is not needed, the automation degree is high, the working stability is good, the working stability of the mold for injection molding is improved, and the use convenience of the mold for injection molding is also improved.

3. After injection molding, the two first piston rods drive the fixed block, the outer mold and the inner mold to move together and move the movable mold out of the molding groove, when the movable mold is moved out of the molding groove, the auxiliary unloading assembly can push the molded workpiece in the molding groove to be attached to the movable mold and move to the outer sides of the molding groove and the fixed mold along with the movable mold, unloading stability is improved, and accordingly working stability of the mold for injection molding is further improved.

4. The pressing assembly can tightly attach the movable die to the fixed die during injection molding, so that the movable die and the fixed die can be prevented from being separated during injection molding, the sealing property and the stability of the movable die and the fixed die are improved, the processing quality of the die for injection molding is improved, and the using effect is good.

Drawings

FIG. 1 is a sectional view showing a side structure of a movable mold approaching a stationary mold according to the present invention;

FIG. 2 is a sectional view of the side structure of the movable mold of the present invention attached to the inside of the stationary mold;

FIG. 3 is a top view of a part of the structure of the movable mold of the present invention attached to the inside of the stationary mold;

FIG. 4 is a sectional view of the side structure of the movable mold after being removed from the fixed mold after the injection molding of the present invention;

FIG. 5 is a schematic structural view of the inner and outer mold portions of the present invention;

FIG. 6 is an enlarged view of part A of the structure of the present invention;

FIG. 7 is an enlarged view of part B of the present invention;

FIG. 8 is an enlarged view of part C of the present invention;

FIG. 9 is an enlarged view of the structure of portion D of the present invention;

FIG. 10 is an enlarged view of part E of the structure of the present invention.

In the figure: 1. fixing a mold; 2. fixing a template; 3. a feeding mechanism; 4. pouring a pipeline; 5. forming a groove; 6. an inner mold; 7. an outer mold; 8. a movable groove; 9. a thimble; 10. a thimble hole; 11. a sealing block; 12. a sealing groove; 13. a fixing plate; 14. a fixed block; 15. a cylinder; 16. a first piston rod; 17. positioning a plate; 18. fixing the rod; 19. a limiting plate; 20. a movable block; 21. mounting grooves; 22. inserting a rod; 23. a first electromagnet; 24. a jack; 25. mounting blocks; 26. mounting a rod; 27. a first joint; 28. a return spring; 29. a second joint; 30. a guide bar; 31. a connecting wire; 32. a second electromagnet; 33. a limiting slide block; 34. a limiting chute; 35. a first cylinder; 36. a first piston; 37. a second piston rod; 38. an air exhaust pipe; 39. an exhaust pipe; 40. an annular mounting tube; 41. blowing a gas pipe; 42. a second cylinder; 43. a second piston; 44. a third piston rod; 45. and (4) an oil pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 10, the present invention provides a mold for injection molding, which has the following technical scheme:

a mould for injection moulding comprises a fixed mould 1 and a movable mould which are mutually matched, a fixed mould plate 2, a feeding mechanism 3 and a pouring pipeline 4 are arranged on the fixed mould 1, a moulding groove 5 for moulding a workpiece is arranged on the fixed mould 1, plastic fluid is injected into the moulding groove 5 by the feeding mechanism 3 through the pouring pipeline 4 for injection moulding, the movable mould comprises an inner mould 6 and an outer mould 7 which is movably sleeved on the outer side of the inner mould 6, a movable groove 8 which is mutually matched with the inner mould 6 is arranged in the outer mould 7, a plurality of thimbles 9 are fixedly arranged at one end of the inner mould 6, one ends of the thimbles 9 are arranged through the outer mould 7, a plurality of thimble holes 10 which are mutually matched with the thimbles 9 are uniformly arranged on the outer mould 7, a sealing block 11 is arranged at one end of each thimble 9 far away from the inner mould 6, a sealing groove 12 which is mutually matched with the sealing block 11 is arranged on the inner side wall of one end of each thimble hole 10, and the sealing block 11 can seal one end of the thimble hole 10 after the thimble 9 is contracted into the movable mould, thereby avoiding large-area plastic fluid flowing between the thimble holes 10 and the thimbles 9 and causing poor injection quality of the mold during injection molding, one side of the movable mold far away from the fixed mold 1 is provided with a fixed plate 13, the top wall and the bottom wall of the outer mold 7 are symmetrically provided with two fixed blocks 14, the outer side wall of the fixed plate 13 near one side of the fixed blocks 14 is symmetrically provided with two air cylinders 15, the output ends of the two air cylinders 15 are both provided with a first piston rod 16, one ends of the two first piston rods 16 are respectively and fixedly connected to the two fixed blocks 14, one side of the fixed plate 13 is fixedly provided with a positioning plate 17 mutually matched with the inner mold 6 and the outer mold 7, one end of the inner mold 6 near the positioning plate 17 is provided with a plurality of fixed rods 18, one ends of the fixed rods 18 are all arranged by penetrating through the positioning plate 17, one end of the fixed rod 18 far away from the inner mold 6 is jointly provided with a limiting plate 19, and the limiting plate 19 can limit the moving range of the inner mold 6, thereby improving the stability of the installation and the movement of the inner mold 6, a fixing mechanism is arranged between the inner mold 6 and the outer mold 7, a discharging point for pushing a workpiece from the outer mold 7 is arranged between the fixed mold 1 and the positioning plate 17, the inner mold 6 is fixedly connected with the outer mold 7 when the outer mold 7 is positioned at the discharging point and the outer mold 7 approaches the fixed mold 1, the inner mold 6 is separated from the outer mold 7 when the outer mold 7 is positioned at the discharging point and the outer mold 7 is far away from the fixed mold 1, a positioning component for fixing the inner mold 6 is arranged on the positioning plate 17, the inner mold 6 is fixedly connected on the positioning plate 17 by the positioning component when the inner mold 6 is separated from the outer mold 7, a limit slide block 33 is fixedly arranged on the inner side wall of the outer mold 7, a limit slide groove 34 matched with the limit slide block 33 is arranged on the inner mold 6, the movement range of the outer mold 7 relative to the inner mold 6 can be limited, thereby preventing the outer mold 7 from being completely separated from the inner mold 6, an auxiliary discharging component is arranged on the fixed mold 1, and the auxiliary discharging assembly is driven by an air cylinder 15, and the outer die 7 is connected with a pressing assembly which tightly attaches the outer die 7 to the fixed die 1.

The two cylinders 15 are started simultaneously, so that the two first piston rods 16 can be driven to drive the fixed block 14 and the outer mold 7 to move horizontally together, the fixed mechanism fixedly connects the inner mold 6 with the outer mold 7 when the outer mold 7 is located at a discharging point and the outer mold 7 approaches the fixed mold 1, the two first piston rods 16 drive the fixed block 14, the outer mold 7 and the inner mold 6 to move together and insert the movable mold into the corresponding molding groove 5 in the fixed mold 1, the movable mold can be attached to the fixed mold 1 by the pressing assembly during injection molding, the sealing performance and the stability of the connection of the movable mold and the fixed mold 1 are improved, and the injection molding quality of a workpiece is improved; after injection molding, the two first piston rods 16 jointly drive the fixed block 14, the outer mold 7 and the inner mold 6 to move and move the movable mold out of the molding groove 5, when the movable mold is moved out of the molding groove 5, the auxiliary discharging assembly can push the molded workpiece in the molding groove 5 to be attached to the movable mold and move to the outer sides of the molding groove 5 and the fixed mold 1 along with the movable mold, when the outer mold 7 is positioned at a discharging point and the outer mold 7 is far away from the fixed mold 1, the inner mold 6 and the outer mold 7 are separated from each other, at the moment, one end of the inner mold 6 is attached to the positioning plate 17 and fixed, and the outer mold 7 can move relative to the inner mold 6, the thimble 9 and the sealing block 11, when the outer mold 7 continuously moves to be in contact with the positioning plate 17, the thimble 9 and the sealing block 11 can push the molded workpiece attached to the outer mold 7 down and automatically discharge, and then when the outer mold 7 approaches to the fixed mold 1 and moves to the discharging point, the fixing mechanism fixedly connects the inner mold 6 and the outer mold 7 again, then the outer die 7 continuously approaches the fixed die 1, the movable die can be inserted into the corresponding forming groove 5 in the fixed die 1 for injection molding, injection molding and automatic discharging of a workpiece can be conveniently completed only by controlling the opening and closing of the cylinder 15, operation is convenient, and accordingly the use convenience of the injection molding die is improved.

As an embodiment of the present invention, referring to fig. 1, 2, 4 and 7, the fixing mechanism includes two movable blocks 20 symmetrically and elastically installed in the outer mold 7, two installation slots 21 matched with the movable blocks 20 are symmetrically formed in the outer mold 7, a plurality of insertion rods 22 are fixedly installed on the outer side walls of the two movable blocks 20 close to one side of the inner mold 6, one ends of the insertion rods 22 penetrate through the inner side walls of the installation slots 21 and extend to the outer side of the outer mold 7, first electromagnets 23 for attracting the movable blocks 20 and the insertion rods 22 to move away from the inner mold 6 are installed on the inner side walls of the two installation slots 21, a plurality of insertion holes 24 matched with the insertion rods 22 are uniformly formed on the outer side walls of the inner mold 6, the insertion rods 22 and the insertion holes 24 are in one-to-one correspondence, control components are connected to the two first electromagnets 23, when the outer mold 7 is located at a discharging point and the outer mold 7 approaches to the fixed mold 1, the first electromagnets 23 are powered off, when the outer die 7 is positioned at a discharging point and the outer die 7 is far away from the fixed die 1, the first electromagnet 23 is electrified.

The movable block 20 is elastically connected in the mounting groove 21 through a spring, the first electromagnet 23 is powered off when the outer mold 7 is positioned at a discharging point and the outer mold 7 approaches the fixed mold 1, after the first electromagnet 23 is powered off, the spring can push the movable block 20 and the inserted rod 22 to move towards the inner mold 6 and insert one end of the inserted rod 22 into the corresponding insertion hole 24 on the inner mold 6 due to the recovery of the elasticity of the spring, so that the inner mold 6 and the outer mold 7 can be fixedly connected together, therefore, the outer mold 7 approaches the fixed mold 1, the inner mold 6 can be driven to move, when the outer mold 7 is positioned at the discharging point and the outer mold 7 is far away from the fixed mold 1, the first electromagnet 23 is powered on, after the first electromagnet 23 is powered on, the movable block 20 and the inserted rod 22 are attracted to be far away from the inner mold 6, therefore, the outer mold 7 can move relative to the inner mold 6, the thimble 9 and the sealing block 11 and push a molded workpiece down from the outer mold 7, and the inner mold 6 and the outer mold 7 can be fixedly connected or the outer mold 7 can be separated conveniently, the connecting stability is good when the inner die 6 and the outer die 7 are connected, so that the working stability of the fixing mechanism and the injection molding die is improved, and the using effect is good.

As an embodiment of the present invention, referring to fig. 1, 2, 4, 7 and 8, each of the two control assemblies includes a mounting block 25 fixedly mounted on an outer side wall of a positioning plate 17, a mounting rod 26 is inserted through each of the two mounting blocks 25, a first joint 27 is mounted at one end of each of the two mounting rods 26 close to an outer die 7, a return spring 28 is wound around an outer side wall of each of the two mounting rods 26, two ends of the return spring 28 are respectively connected to the mounting block 25 and the first joint 27, two second joints 29 mutually matched with the first joints 27 are symmetrically mounted at one end of the outer die 7 close to the positioning plate 17, the two second joints 29 are respectively and electrically connected to the two first electromagnets 23, a guide rod 30 penetrating the mounting block 25 is mounted on each of the two first joints 27, a connecting wire 31 is connected to each of the two first joints 27, and each connecting wire 31 penetrates through the guide rod 30, the two connection lines 31 are electrically connected to the two cylinders 15, respectively.

When the two cylinders 15 drive the outer die 7 to move to the discharging point together, one end of the inner die 6 is attached to the positioning plate 17, at this time, the reset spring 28 pushes the first connector 27 to just contact with the second connector 29 on the outer die 7 due to the restoration of the self-elastic force, when the outer die 7 is located at the discharging point and the outer die 7 approaches to the fixed die 1, the first connector 27 is separated from the second connector 29, at this time, the first electromagnet 23 is powered off, the inner die 6 is fixedly connected with the outer die 7, when the outer die 7 is located at the discharging point and the outer die 7 is far away from the fixed die 1, the outer die 7 and the second connector 29 push the first connector 27 and the mounting rod 26 to approach to the positioning plate 17 and keep the first connector 27 in contact with the second connector 29, at this time, the first electromagnet 23 is continuously powered on, and the inner die 6 is continuously separated from the outer die 7, the inner die 6 can be fixedly connected with the outer die 7 or the inner die 6 is separated from the outer die 7 automatically by controlling the outer die 7 to move through the cylinders 15, need not manual regulation, degree of automation is high and job stabilization nature is good, has not only improved the stability of mould for injection moulding work, has also promoted the convenience that the mould for injection moulding used.

Referring to fig. 1, 2 and 4, the positioning assembly includes a second electromagnet 32 fixedly mounted on the positioning plate 17, and the second electromagnet 32 is electrically connected to the connecting wire 31.

One end of the inner die 6 is attached to the positioning plate 17, the first connector 27 is in contact with the second connector 29, the connecting wire 31 and the second electromagnet 32 are electrified, and the inner die 6 is tightly sucked and fixed on the positioning plate 17 after the second electromagnet 32 is electrified, so that the inner die 6 can be prevented from sliding and shifting when the outer side of the inner die 6 moves, the inner die 6 and the outer die 7 can be conveniently and fixedly connected, the moving stability of the movable die is improved, and the working stability of the injection molding die is improved.

Referring to fig. 1, 2, 4 and 10, as an embodiment of the present invention, the auxiliary discharging assembly includes a first cylinder 35 fixedly installed on the top wall of the fixed die plate 2, a first piston 36 is movably installed in the first cylinder 35, a second piston rod 37 is installed at one end of the first piston 36, one end of the second piston rod 37 extends to the outside of the first cylinder 35 and is fixedly connected to the fixed block 14, an air suction pipe 38 and an air discharge pipe 39 are installed at one end of the first cylinder 35 close to the fixed block 14, a check valve is installed in each of the air suction pipe 38 and the air discharge pipe 39, the check valve is arranged such that air can only be sucked into the first cylinder 35 through the air suction pipe 38 and can only discharge air sucked into the first cylinder 35 through the air discharge pipe 39, an annular installation pipe 40 is connected to one end of the air discharge pipe 39, the annular installation pipe 40 is fixed to the fixed die plate 2, a plurality of air blowing pipes 41 are uniformly installed on the annular installation pipe 40, and the one end of blast pipe 41 all extends to in the shaping groove 5, and the one end of blast pipe 41 all flushes with the inside wall of shaping groove 5, and the one end that blast pipe 41 is close to shaping groove 5 all installs the check valve, and the check valve can prevent that plastic fluid from flowing into in blast pipe 41 during injection moulding.

When the cylinder 15 drives the first piston rod 16 to push the fixed block 14 and the outer mold 7 to move, the second piston rod 37 and the first piston 36 move along with the fixed block, when the outer mold 7, the second piston rod 37 and the first piston 36 approach the fixed mold 1, gas in the first cylinder 35 is sucked through the air suction pipe 38, when the outer mold 7, the second piston rod 37 and the first piston 36 move away from the fixed mold 1, the gas in the first cylinder 35 is sprayed out through the air discharge pipe 39, the annular mounting pipe 40 and the air blowing pipe 41, and the sprayed gas pushes a molded workpiece in the molding groove 5 to be attached to the outer mold 7 tightly and move to the outer side of the molding groove 5 along with the outer mold 7, so that the molded workpiece after injection molding can be prevented from being clamped in the molding groove 5, the discharging stability is improved, and the working stability of the mold for injection molding is further improved.

As an embodiment of the present invention, referring to fig. 1, 2, 3 and 4, the compressing assembly includes a plurality of second cylinders 42 fixedly mounted on the fixing plate 13, each second cylinder 42 has a second piston 43 movably mounted therein, each second piston 43 has a third piston rod 44 mounted thereon, one end of each third piston rod 44 is fixedly connected to the fixing block 14, one end of each second cylinder 42 far from the fixing block 14 is connected to an oil pipe 45, and one end of each oil pipe 45 near the second cylinder 42 is mounted with an electromagnetic valve electrically connected to the cylinder 15.

When the cylinder 15 drives the first piston rod 16 to push the fixed block 14 and the outer mold 7 to move, the third piston rod 44 and the second piston 43 move along with the fixed mold 1, when the outer mold 7, the third piston rod 44 and the second piston 43 approach the fixed mold 1, hydraulic oil is sucked into the second cylinder body 42 through the oil pipe 45, the outer mold 7 drives the inner mold 6 to be attached to the fixed mold 1, and when the cylinder 15 is powered off, the electromagnetic valve is closed along with the power off and seals the hydraulic oil in the second cylinder body 42.

The working principle is as follows: simultaneously starting the two air cylinders 15 can drive the two first piston rods 16 to drive the fixed block 14 and the outer mold 7 to move horizontally together, when the two air cylinders 15 drive the outer mold 7 to move to a discharging point, one end of the inner mold 6 is attached to the positioning plate 17, at the moment, the reset spring 28 can push the first connector 27 to just contact with the second connector 29 on the outer mold 7 due to the recovery of the self elastic force, the outer mold 7 is positioned at the discharging point, when the outer mold 7 approaches to the fixed mold 1, the first connector 27 is separated from the second connector 29, at the moment, the first electromagnet 23 is powered off, after the first electromagnet 23 is powered off, the spring can push the movable block 20 and the inserted rod 22 to move towards the inner mold 6 due to the recovery of the self elastic force, and insert one end of the inserted rod 22 into the corresponding insertion hole 24 on the inner mold 6, so that the inner mold 6 and the outer mold 7 can be fixedly connected together, therefore, when the outer mold 7 approaches to the fixed mold 1, the inner mold 6 can be driven to move, when the outer die 7 is located at a discharging point and the outer die 7 is far away from the fixed die 1, the outer die 7 and the second joint 29 push the first joint 27 and the mounting rod 26 to approach the positioning plate 17 and keep the first joint 27 and the second joint 29 in contact, at this time, the first electromagnet 23 is continuously electrified, and after the first electromagnet 23 is electrified, the movable block 20 and the inserting rod 22 are attracted to be far away from the inner die 6, so that the outer die 7 can move relative to the inner die 6, the thimble 9 and the sealing block 11 and push the formed workpiece down from the outer die 7 when the outer die 7 is far away from the fixed die 1; when the cylinder 15 drives the first piston rod 16 to push the fixed block 14 and the outer die 7 to move, the third piston rod 44 and the second piston 43 move along with the fixed block, when the outer die 7, the third piston rod 44 and the second piston 43 approach the fixed die 1, hydraulic oil is sucked into the second cylinder body 42 through the oil pipe 45, the outer die 7 drives the inner die 6 to be attached to the fixed die 1, and when the cylinder 15 is powered off, the electromagnetic valve is closed along with the power off and seals the hydraulic oil in the second cylinder body 42, and due to the resistance of the hydraulic oil, the movable die can be attached to and fixed on the fixed die 1, so that the movable die and the fixed die 1 can be prevented from being separated during injection molding, and the sealing performance and the stability of the connection of the movable die and the fixed die 1 are improved; when the cylinder 15 drives the first piston rod 16 to push the fixed block 14 and the outer mold 7 to move, the second piston rod 37 and the first piston 36 move along with the fixed block, when the outer mold 7, the second piston rod 37 and the first piston 36 approach the fixed mold 1, gas is sucked into the first cylinder body 35 through the air suction pipe 38, when the outer mold 7, the second piston rod 37 and the first piston 36 move away from the fixed mold 1, the gas in the first cylinder body 35 is sprayed out through the air discharge pipe 39, the annular mounting pipe 40 and the air blowing pipe 41, and the sprayed gas pushes a molded workpiece in the molding groove 5 to be attached to the outer mold 7 tightly and move to the outer side of the molding groove 5 along with the outer mold 7, so that the molded workpiece after injection molding can be prevented from being clamped in the molding groove 5, and the discharging stability is improved.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a mould for injection moulding, is including cover half (1) and the movable mould of mutually supporting, install fixed die plate (2), feed mechanism (3) and pour pipeline (4) on cover half (1), be equipped with on cover half (1) and be used for shaping groove (5) of work piece, its characterized in that: the movable mould comprises an inner mould (6) and an outer mould (7) which is sleeved on the outer side of the inner mould (6) in a movable mode, a movable groove (8) which is matched with the inner mould (6) is formed in the outer mould (7), a plurality of thimbles (9) are fixedly installed at one end of the inner mould (6), one end of each thimble (9) penetrates through the outer mould (7) to be arranged, a plurality of thimble holes (10) which are matched with the thimbles (9) are uniformly formed in the outer mould (7), a sealing block (11) is installed at one end, far away from the inner mould (6), of each thimble (9), a sealing groove (12) which is matched with the sealing block (11) is formed in the inner side wall of one end of each thimble hole (10), a fixing plate (13) is arranged on one side, far away from the fixed mould (1), and two fixing blocks (14) are symmetrically installed on the top wall and the bottom wall of the outer mould (7), two cylinders (15) are symmetrically installed on the outer side wall of the fixing plate (13) close to one side of the fixing block (14), two first piston rods (16) are installed at the output ends of the cylinders (15), one ends of the two first piston rods (16) are respectively and fixedly connected to the two fixing blocks (14), a positioning plate (17) matched with the inner die (6) and the outer die (7) is fixedly installed at one side of the fixing plate (13), a plurality of fixing rods (18) are installed at one ends of the inner die (6) close to the positioning plate (17), one ends of the fixing rods (18) are arranged by penetrating through the positioning plate (17), a limiting plate (19) is installed at one end of each fixing rod (18) far away from the inner die (6), a fixing mechanism is arranged between the inner die (6) and the outer die (7), a discharging point for pushing a workpiece down from the outer die (7) is arranged between the fixed die (1) and the positioning plate (17), the inner die (6) is fixedly connected with the outer die (7) when the outer die (7) is positioned at a discharging point and the outer die (7) approaches the fixed die (1), the inner die (6) and the outer die (7) are separated from each other when the outer die (7) is positioned at a discharging point and the outer die (7) is far away from the fixed die (1), a positioning component for fixing the inner die (6) is arranged on the positioning plate (17), and the positioning component fixedly connects the inner mold (6) to the positioning plate (17) when the inner mold (6) is separated from the outer mold (7), a limiting slide block (33) is fixedly arranged on the inner side wall of the outer die (7), a limiting chute (34) matched with the limiting slide block (33) is arranged on the inner die (6), an auxiliary discharging assembly is arranged on the fixed die (1), and the auxiliary discharging assembly is driven by an air cylinder (15), and the outer die (7) is connected with a pressing assembly which tightly attaches the outer die (7) to the fixed die (1).

2. The mold for injection molding according to claim 1, characterized in that: the fixing mechanism comprises two movable blocks (20) which are symmetrically and elastically installed in an outer die (7), two mounting grooves (21) which are matched with the movable blocks (20) are symmetrically formed in the outer die (7), a plurality of inserting rods (22) are fixedly installed on the outer side wall, close to one side of the inner die (6), of each movable block (20), one ends of the inserting rods (22) penetrate through the inner side wall of each mounting groove (21) and extend to the outer side of the outer die (7), first electromagnets (23) which attract the movable blocks (20) and the inserting rods (22) to keep away from the inner die (6) are installed on the inner side wall of each mounting groove (21), a plurality of inserting holes (24) which are matched with the inserting rods (22) are uniformly formed in the outer side wall of the inner die (6), the inserting rods (22) correspond to the inserting holes (24) one to one, and two control assemblies are connected to the first electromagnets (23), the first electromagnet (23) is powered off when the outer die (7) is located at a discharging point and the outer die (7) approaches the fixed die (1), and the first electromagnet (23) is powered on when the outer die (7) is located at the discharging point and the outer die (7) is far away from the fixed die (1).

3. The mold for injection molding according to claim 2, characterized in that: the two control assemblies respectively comprise mounting blocks (25) fixedly mounted on the outer side wall of the positioning plate (17), mounting rods (26) are inserted into the two mounting blocks (25), first joints (27) are respectively mounted at one ends, close to the outer die (7), of the two mounting rods (26), return springs (28) are wound on the outer side walls of the two mounting rods (26), the two ends of each return spring (28) are respectively connected to the mounting blocks (25) and the first joints (27), two second joints (29) matched with the first joints (27) are symmetrically mounted at one ends, close to the positioning plate (17), of the outer die (7), the two second joints (29) are respectively and electrically connected to the two first electromagnets (23), guide rods (30) penetrating through the mounting blocks (25) are mounted on the two first joints (27), two all be connected with connecting wire (31) on first joint (27), and connecting wire (31) all run through guide bar (30) and set up, two connecting wire (31) electric connection respectively is on two cylinders (15).

4. A mold for injection molding according to claim 3, characterized in that: the positioning assembly comprises a second electromagnet (32) fixedly mounted on the positioning plate (17), and the second electromagnet (32) is electrically connected to the connecting wire (31).

5. The mold for injection molding according to claim 1, characterized in that: the auxiliary discharging assembly comprises a first cylinder body (35) fixedly mounted on the top wall of a fixed die plate (2), a first piston (36) is movably mounted in the first cylinder body (35), a second piston rod (37) is mounted at one end of the first piston (36), one end of the second piston rod (37) extends to the outer side of the first cylinder body (35) and is fixedly connected onto the fixed block (14), an exhaust pipe (38) and an exhaust pipe (39) are mounted at one end, close to the fixed block (14), of the first cylinder body (35), check valves are mounted in the exhaust pipe (38) and the exhaust pipe (39), an annular mounting pipe (40) is connected to one end of the exhaust pipe (39), the annular mounting pipe (40) is fixed onto the fixed die plate (2), a plurality of air blowing pipes (41) are uniformly mounted on the annular mounting pipe (40), and one end of each air blowing pipe (41) extends into a forming groove (5), one end of the air blowing pipe (41) is flush with the inner side wall of the forming groove (5), and one end, close to the forming groove (5), of the air blowing pipe (41) is provided with a check valve.

6. The mold for injection molding according to claim 1, characterized in that: compress tightly the subassembly and include a plurality of second cylinder bodies (42) of fixed mounting on fixed plate (13), every equal movable mounting has second piston (43), every in the second cylinder body (42) all install third piston rod (44) on second piston (43), and the equal fixed connection of one end of third piston rod (44) is on fixed block (14), every the one end that fixed block (14) were kept away from in second cylinder body (42) all is connected with oil pipe (45), every electric connection's solenoid valve on cylinder (15) is all installed to the one end that oil pipe (45) are close to second cylinder body (42).