CN111716657A

CN111716657A - Differential type pouring gate ejection device and method for injection mold

Info

Publication number: CN111716657A
Application number: CN202010610671.5A
Authority: CN
Inventors: 韦健娇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-09-29

Abstract

The invention discloses a differential sprue ejection device for an injection mold in the technical field of injection molds, which comprises a lower template, the outer wall of the top of the lower template is provided with an upper template, the outer wall of the top of the lower mold core is provided with a runner, the outer wall of the bottom of the lower mold core is provided with a product ejector rod and a runner ejector rod, the bottom end of the runner ejector rod extends to the outer wall of the bottom of the lower template and is connected with the upper top plate, the bottom end of the product ejector rod extends to the outer wall of the bottom of the upper top plate and is connected with the lower top plate, the through holes are formed in the outer walls of the left side and the right side of the bottom plate, the limiting blocks are movably mounted between the outer wall of the top of the upper top plate and the outer wall of the bottom of the lower template, and the limiting blocks are inserted between the bottom of the lower template and the top of the upper top plate in the device, so that the product ejector rods and the runner ejector rods cannot automatically move upwards, the product ejector rods cannot enter a cavity, and the runner ejector rods cannot influence the position of a runner.

Description

Differential type pouring gate ejection device and method for injection mold

Technical Field

The invention relates to the technical field of injection molds, in particular to a differential type sprue ejection device and an ejection method for an injection mold.

Background

The double-color injection mold is one of injection molds, the double-color injection mold is in the using process, a flow channel is taken out of an inner cavity of a cavity for convenience, a differential ejection device is generally used, the flow channel is moved out of the cavity by the lifting of an ejector pin, the ejector pin can eject a product which completes double-color processing out, the production efficiency of the product is improved, however, the ejector pin is not fixed, the ejector pin is directly placed on a base after being connected with a needle plate and is easy to move, if the ejector pin enters the cavity, the product is not in accordance with the processing requirement, and the position of the flow channel can be influenced by the automatic upward moving of the ejector pin, therefore, the differential sprue ejection device and ejection method for the injection mold are provided.

Disclosure of Invention

The present invention is directed to a differential gate ejection device and method for an injection mold, so as to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a differential sprue ejection device for an injection mold comprises a lower template, wherein an upper template is arranged on the outer wall of the top of the lower template, connecting plates are fixedly mounted on the outer walls of the left side and the right side of the bottom of the lower template, a bottom plate is arranged at the bottom ends of the two groups of connecting plates, an upper mold core is fixedly mounted on the outer walls of the left side and the right side of the bottom of the upper template, a lower mold core is fixedly mounted on the outer walls of the left side and the right side of the top of the lower template, a runner is arranged on the outer wall of the top of the lower mold core, a product ejector rod and a runner ejector rod are arranged on the outer wall of the bottom of the lower mold core, the top end of the runner ejector rod extends to the outer wall of the bottom of an upper top plate and is connected with the upper top plate, a through hole is formed in each, and the bottom ends of the two groups of through hole inner cavities are respectively inserted with a large top rod and a small top rod, the outer wall of the bottom of the lower top plate is provided with an opening, and a limiting block is movably arranged between the outer wall of the top of the upper top plate and the outer wall of the bottom of the lower template.

Preferably, the outer wall of both sides is laminated with lower bolster bottom outer wall, last roof top outer wall respectively about the stopper, and is two sets of the equal fixed mounting of one side outer wall that the stopper was kept away from each other has the guide block, the mounting groove has all been seted up to bottom plate top left and right sides outer wall, the guide block bottom is pegged graft in the inner chamber of mounting groove, and is two sets of fixed mounting has reset spring between one side outer wall that the guide block was kept away from each other and the relative one side inner wall of two sets of mounting grooves, and is two sets of the equal fixed mounting of one side bottom outer wall that the guide block is close to each other has the guide bar, and is two sets of the.

Preferably, the width of the vertical section of the limiting block is gradually reduced from outside to inside, the vertical section of the outer wall of one side, close to each other, at the bottom of the limiting block is arc-shaped, and the distance between the outer wall of one side, far away from each other, of the guiding block and the outer wall of one side, opposite to the two groups of connecting plates, is larger than the width of the vertical section of the limiting block.

Preferably, the outer wall of the top of the upper top plate and the outer wall of the bottom of the lower template are both provided with mounting blocks, a supporting spring is fixedly mounted between the two mounting blocks, an inserting block is fixedly mounted on the outer wall of one side, away from each other, of the two mounting blocks, inserting grooves matched with the inserting blocks are formed in the connecting parts of the upper top plate, the lower template and the mounting blocks, and the inserting blocks are inserted into the inner cavities of the inserting grooves in an inserting mode.

Preferably, the equal fixed mounting in bottom plate top left and right sides outer wall has the connecting block, the spread groove has been seted up to connecting plate bottom outer wall, and the connecting block is pegged graft in the inner chamber of spread groove, the jack has been seted up to the connecting block outer wall, the jack inner chamber runs through to peg graft there is the inserted bar, the equal slidable mounting in both sides outer wall has the fixed block about the inserted bar, and the fixed block outer wall laminates with the connecting plate outer wall mutually.

Preferably, the shifting chute has all been seted up to the outer wall of both sides about the inserted bar, and shifting chute inner chamber slidable mounting has the carriage release lever, both ends respectively with left and right sides fixed block fixed connection about the carriage release lever, one side outer wall and fixture block fixed connection that the carriage release lever is close to the inserted bar, and the shifting chute inner wall set up with fixture block assorted draw-in groove, the inserted bar inner chamber runs through to peg graft has the bull stick, equal fixed mounting in both ends has the carousel about the bull stick, both ends all have cup jointed sleeve pipe and commentaries on classics piece about the bull stick outer wall, fixed mounting has the promotion spring between outer wall of both sides about the sleeve pipe and the upper and lower both sides fixed block, the vertical cross.

Preferably, a connecting sleeve is arranged at the connecting part of the lower top plate and the product ejector rod, the connecting sleeve is arranged at the connecting part of the upper top plate and the flow channel ejector rod, a screw hole is formed in the outer wall of the top of the connecting sleeve, the bottom ends of the product ejector rod and the flow channel ejector rod are inserted into the inner cavity of the screw hole, and threads are arranged at the bottom ends of the outer walls of the product ejector rod and the flow channel ejector rod.

Preferably, the ejection method of the differential type gate ejection device for the injection mold comprises the following steps:

s1: during injection molding, the upper template moves downwards to contact with the lower template, mold assembly is carried out, then molten plastic raw materials are injected, and mold opening is carried out after cooling and molding;

s2: the cope match-plate pattern rises and moves away from the lower bolster top, then big top rod and little top rod insert respectively in the inner chamber of two sets of through-holes, big top rod contacts with roof down earlier, and upwards promote, make left product ejector pin and runner ejector pin rise, push away left product and runner together, the in-process of roof down is moved in big top rod top, little top rod enters into the trompil through the through-hole, contact with roof up, upwards push up right side runner ejector pin, push away right side runner, the time that makes the runner take out from the die cavity smoothly is short, and need not to increase runner length, the molding cycle is short, the production efficiency of product is high.

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

1. in the device, the limiting block is inserted between the bottom of the lower template and the top of the upper top plate, so that the product ejector rod and the runner ejector rod cannot automatically move upwards, the product ejector rod cannot automatically enter a cavity, the runner ejector rod cannot influence the position of a runner, and the processing quality of a product is ensured;

2. the fixing block is pressed to the inner side, so that the fixing block is not contacted with the connecting plate, the inserting rod is moved out of the inner cavity of the inserting hole, the bottom plate is disconnected with the connecting plate, the bottom plate is conveniently moved away, parts between the bottom of the lower template and the top of the bottom plate are conveniently adjusted, and the using effect of the limiting block is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure A of the present invention;

FIG. 3 is a schematic view of a connection structure of a connection plate and a bottom plate according to the present invention;

FIG. 4 is a schematic view of a connection cross-sectional structure of the ejector rod and the connecting sleeve of the product of the invention.

In the figure: 1. a lower template; 2. mounting a template; 3. a connecting plate; 4. a base plate; 5. molding a mold core; 6. a lower die core; 7. a flow channel; 8. a product ejector rod; 9. a runner ejector rod; 10. a lower top plate; 11. an upper top plate; 12. a large top stick; 13. a small top stick; 14. a guide block; 15. a limiting block; 16. a guide bar; 17. mounting grooves; 18. a return spring; 19. a support spring; 20. mounting blocks; 21. inserting a block; 22. connecting sleeves; 23. connecting blocks; 24. connecting grooves; 25. a jack; 26. inserting a rod; 27. a fixed block; 28. a turntable; 29. a push spring; 30. rotating the block; 31. a travel bar; 32. a sleeve; 33. a rotating rod; 34. and a screw hole.

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.

The invention provides a technical scheme that: referring to fig. 1, a differential gate ejection device for an injection mold includes a lower mold plate 1;

referring to fig. 1, an upper template 2 is arranged on the outer wall of the top of a lower template 1, connecting plates 3 are fixedly mounted on the outer walls of the left side and the right side of the bottom of the lower template 1, bottom plates 4 are arranged at the bottom ends of the two groups of connecting plates 3, upper mold cores 5 are fixedly mounted on the outer walls of the left side and the right side of the bottom of the upper template 2, lower mold cores 6 are fixedly mounted on the outer walls of the left side and the right side of the top of the lower template;

referring to fig. 1, a product ejector rod 8 and a runner ejector rod 9 are arranged on the outer wall of the bottom of a lower die core 6, the top end of the runner ejector rod 9 is attached to a runner 7, the bottom end of the runner ejector rod 9 extends to the outer wall of the bottom of a lower die plate 1 and is connected with an upper top plate 11, the runner ejector rod 9 can move upwards to move the runner 7 out of a cavity, the top end of the product ejector rod 8 extends into the cavity of the lower die core 6, the bottom end of the product ejector rod 8 extends to the outer wall of the bottom of the upper top plate 11 and is connected with a lower top plate 10, the product ejector rod 8 rises to eject a product out of the cavity, the top of the lower top plate 10 is attached to the bottom of the upper top plate 11, through holes are formed in the outer walls of the left side and the right side of the bottom of a bottom plate 4, a large top stick 12 and a small top stick 13, the diameter of the opening is smaller than that of the large top stick 12 and larger than that of the small top stick 13, so that the small top stick 13 is inserted into the opening to be contacted with the upper top plate 11, the right runner ejector rod 9 is lifted to push out the right runner 7, the large top stick 12 can only be contacted with the lower top plate 10 when entering the through hole, and a left product and the runner 7 are ejected;

referring to fig. 1 and 2, a limiting block 15 is movably mounted between the outer wall of the top of the upper top plate 11 and the outer wall of the bottom of the lower template 1 to fix the positions of the upper top plate 11 and the lower top plate 10, so that the product ejector rod 8 and the runner ejector rod 9 cannot automatically move upwards, the top end of the product ejector rod 8 is prevented from entering the cavity to affect the product processing quality, and the runner ejector rod 9 is prevented from affecting the position of the runner 7;

referring to fig. 1 and 2, the outer walls of the upper and lower sides of the stoppers 15 are respectively attached to the outer wall of the bottom of the lower template 1 and the outer wall of the top of the upper top plate 11, the outer walls of the two groups of stoppers 15 at the side away from each other are fixedly provided with guide blocks 14, the outer walls of the left and right sides of the top of the bottom plate 4 are respectively provided with a mounting groove 17, the bottom ends of the guide blocks 14 are inserted into the inner cavities of the mounting grooves 17, the bottom ends of the guide blocks 14 are slidably mounted in the inner cavities of the mounting grooves 17, so that the guide blocks 14 can only slide left and right, a return spring 18 is fixedly mounted between the outer wall of the side away from each other of the two groups of guide blocks 14 and the inner wall of the side opposite to the two groups of mounting grooves 17, the return spring 18 ensures that the guide blocks 14 do not automatically move, so that the stoppers 15 are stably positioned between the lower template 1 and the upper, the guide rod 16 is positioned above the large top stick 12 and the small top stick 13, the vertical cross sections of the top ends of the large top stick 12 and the small top stick 13 are trapezoidal, when the large top stick 12 and the small top stick 13 move upwards, the guide rod 16 is pushed outwards, the guide block 14 drives the limiting block 15 to move away from the space between the upper top plate 11 and the lower template 1, the limiting block 15 cannot be influenced when the large top stick 12 and the small top stick 13 push the product ejector rod 8 and the runner ejector rod 9 to ascend, the limiting block 15 is moved away by moving the large top stick 12 and the small top stick 13 upwards, other equipment is not needed to be installed for moving the limiting block 15, the limiting block 15 is not needed to be moved manually, the limiting block 15 is convenient to move away, and the functionality of the large top stick 12 and the small top stick 13 is improved;

referring to fig. 1 and 2, the width of the vertical section of the limiting blocks 15 gradually decreases from outside to inside, the vertical section of the outer wall of the side where the bottoms of the two sets of limiting blocks 15 are close to each other is arc-shaped, when the big top stick 12 and the small top stick 13 move downwards to the lower part of the guide rod 16, the return spring 18 resets and expands to push the guide block 14 inwards, so that the limiting block 15 automatically moves between the upper top plate 11 and the lower template 1, the limiting block 15 is conveniently moved between the upper top plate 11 and the lower template 1 through the arc-shaped surface at the bottom of the limiting block 15, the distance between the outer wall of one side, away from each other, of the two groups of guiding blocks 14 and the outer wall of the opposite side of the two groups of connecting plates 3 is larger than the width of the vertical section of the limiting block 15, the large ejector rod 12 and the small ejector rod 13 move upwards, and when the guiding rod 16 is pushed outwards to the outside and cannot move, the limiting block 15 is moved out from between the lower template 1 and the upper top plate 11, so that the device can normally complete work;

referring to fig. 1 and 2, the outer wall of the top of the upper top plate 11 and the outer wall of the bottom of the lower plate 1 are both provided with mounting blocks 20, a supporting spring 19 is fixedly mounted between the two sets of mounting blocks 20, the outer wall of one side, away from each other, of each of the two sets of mounting blocks 20 is fixedly provided with an insertion block 21, the connecting parts of the upper top plate 11, the lower plate 1 and the mounting blocks 20 are provided with insertion slots matched with the insertion blocks 21, the insertion blocks 21 are inserted into the inner cavities of the insertion slots, the insertion blocks 21 are fixed in the inner cavities of the insertion slots by the friction force between the outer walls of the insertion blocks 21 and the inner walls of the insertion slots, the mounting blocks 20 are pulled to move out of the inner cavities of the insertion slots, so that the connection between the mounting blocks 20 and the lower plate 1 and the upper top plate 11 is disconnected, the supporting spring 19 and the mounting blocks 20 are convenient to be taken down, when the large top stick 12 and the small top, the upper top plate 11 and the lower top plate 10 are pushed downwards, so that the product ejector rod 8 and the runner ejector rod 9 are conveniently reset;

referring to fig. 1, 3 and drawings, the outer walls of the left and right sides of the top of the bottom plate 4 are fixedly provided with connecting blocks 23, the outer wall of the bottom of the connecting plate 3 is provided with a connecting groove 24, the connecting blocks 23 are inserted into the inner cavity of the connecting groove 24, the outer wall of the connecting block 23 is provided with inserting holes 25, the inner cavity of the inserting holes 25 is inserted with inserting rods 26, the outer walls of the left and right sides of the inserting rods 26 are slidably provided with fixing blocks 27, the outer walls of the fixing blocks 27 are attached to the outer wall of the connecting plate 3, the fixing blocks 27 are pushed inwards to prevent the fixing blocks 27 from contacting the connecting plate 3, the inserting rods 26 are moved out of the inner cavity of the inserting holes 25 to disconnect the connecting blocks 23 from the connecting groove 24, so that;

referring to fig. 3, the outer walls of the upper and lower sides of the insertion rod 26 are both provided with a moving groove, and the inner cavity of the moving groove is slidably provided with a moving rod 31, the moving rod 31 can only slide up and down in the inner cavity of the moving groove, the left and right ends of the moving rod 31 are respectively fixedly connected with the left and right fixed blocks 27, the left and right fixed blocks 27 are connected by the moving rod 31, so that when one fixed block 27 moves inward, the fixed block 27 on the other side can be driven to move inward, the two fixed blocks 27 are convenient to move, the fixed block 27 is not attached to the connecting plate 3, the outer wall of one side of the moving rod 31 close to the insertion rod 26 is fixedly connected with the fixture block, the inner wall of the moving groove is provided with a clamping groove matched with the fixture block, and when the fixed block 27 moves inward, the moving rod 31 can move inward, the fixture block is inserted into the, the fixing block 27 is fixed without applying force when the inserting rod 26 passes in and out of the inserting hole 25, the bottom plate 4 is convenient to disassemble and assemble, the rotating rod 33 is inserted in the inner cavity of the inserting rod 26 in a penetrating manner, the rotating rod 33 can only rotate in the inner cavity of the inserting rod 26, the rotating discs 28 are fixedly arranged at the left end and the right end of the rotating rod 33, the sleeve 32 and the rotating block 30 are sleeved at the left end and the right end of the outer wall of the rotating rod 33, the sleeve 32 is only sleeved on the outer wall of the rotating rod 33, the rotating rod 33 cannot drive the sleeve 32 to rotate along with the rotation, the pushing spring 29 is prevented from being twisted and damaged by the pushing spring 29, the rotating block 30 is fixedly arranged on the outer wall of the rotating rod 33, the rotating rod 33 can drive the rotating block 30 to rotate together, the pushing spring 29 is fixedly arranged between the outer walls of the upper side and the lower side of the sleeve 32 and the fixing block 27 at the, the vertical section of the rotating block 30 is oval, the wall with the longest diameter of the rotating block 30 is in contact with the fixed block 27, the fixed block 27 is supported, and a fixing effect is achieved, so that the fixed block 27 is stably attached to the connecting plate 3, when the fixed block 27 moves inwards and is not in contact with the connecting plate 3, the clamping block is inserted into the inner cavity of the clamping groove, the wall with the shortest diameter of the rotating block 30 is in contact with the fixed block 27, when the bottom plate 4 needs to be installed, the inserting rod 26 is inserted into the inner cavity of the inserting hole 25, the rotating disc 28 is rotated, the rotating rod 33 drives the rotating block 30 to rotate, the wall with the larger diameter of the rotating block 30 is gradually in contact with the fixed block 27, the fixed block 27 is pushed outwards, the clamping block is moved out of the inner cavity of the clamping groove, the fixed block 27 is conveniently pushed outwards, the fixed block 27 is in;

referring to fig. 1, 2 and 4, a connecting sleeve 22 is disposed at a connecting portion of the lower top plate 10 and the product push rod 8, the connecting sleeve 22 is fixedly connected with the lower top plate 10 and the upper top plate 11, and the connecting part of the upper top plate 11 and the runner ejector rod 9 is provided with a connecting sleeve 22, the outer wall of the top part of the connecting sleeve 22 is provided with a screw hole 34, the bottom ends of the product ejector rod 8 and the flow channel ejector rod 9 are inserted in the inner cavity of the screw hole 34, threads are arranged at the bottom ends of the outer walls of the product ejector rod 8 and the flow channel ejector rod 9 and are matched with the threads on the inner wall of the screw hole 34, the bottom end of the product ejector rod 8 or the flow channel ejector rod 9 is fixed in the inner cavity of the connecting sleeve 22, the product ejector rod 8 or the flow channel ejector rod 9 is rotated, the product ejector rod 8 and the runner ejector rod 9 can be taken down from the upper part of the connecting sleeve 22 for replacing the product ejector rod 8 and the runner ejector rod 9, and the runner ejector rod 9 and the product ejector rod 8 can be taken out of the lower template 1 and the lower die core 6 downwards.

An ejection method of a differential gate ejection device for an injection mold, comprising the steps of:

s1: during injection molding, the upper template 2 moves downwards to be in contact with the lower template 1, mold assembly is carried out, then molten plastic raw materials are injected, and mold opening is carried out after cooling and molding;

s2: the upper template 2 rises and is removed from the upper part of the lower template 1, then the large ejector rod 12 and the small ejector rod 13 are respectively inserted into the inner cavities of the two groups of through holes, the guide rod 16 is pushed outwards, the guide block 14 is driven by the guide block 15 to be removed from the upper part of the upper ejector plate 11, then the large ejector rod 12 and the small ejector rod 13 continue to move upwards, the large ejector rod 12 is firstly contacted with the lower ejector plate 10 and is pushed upwards, the ejector rod 8 of the product on the left side and the ejector rod 9 of the runner are lifted, the product on the left side and the runner 7 are lifted out together, in the process that the large ejector rod 12 pushes the lower ejector plate 10, the small ejector rod 13 enters the opening through the through hole and is contacted with the upper ejector plate 11, the ejector rod 9 of the runner on the right side is.

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 differential formula is used for injection mold's runner ejecting device, includes lower bolster (1), its characterized in that: the outer wall of the top of the lower template (1) is provided with an upper template (2), the outer walls of the left side and the right side of the bottom of the lower template (1) are fixedly provided with connecting plates (3), the bottom ends of two groups of connecting plates (3) are provided with a bottom plate (4), the outer walls of the left side and the right side of the bottom of the upper template (2) are fixedly provided with upper mold cores (5), the outer walls of the left side and the right side of the top of the lower template (1) are fixedly provided with lower mold cores (6), the outer wall of the top of each lower mold core (6) is provided with a runner (7), the outer wall of the bottom of each lower mold core (6) is provided with a product ejector rod (8) and a runner ejector rod (9), the top end of each runner ejector rod (9) is attached to the runner (7), the bottom end of each runner ejector rod (9) extends to the outer wall of, the bottom end of the product ejector rod (8) extends to the outer wall of the bottom of the upper top plate (11) and is connected with the lower top plate (10), through holes are formed in the outer walls of the left side and the right side of the bottom plate (4), a large ejector rod (12) and a small ejector rod (13) are respectively inserted into the bottoms of the two groups of through hole inner cavities, an opening is formed in the outer wall of the bottom of the lower top plate (10), and a limiting block (15) is movably mounted between the outer wall of the top of the upper top plate (11) and the outer wall of.

2. The differential gate ejection device for an injection mold of claim 1, wherein: stopper (15) upper and lower both sides outer wall laminate mutually with lower bolster (1) bottom outer wall, last roof (11) top outer wall respectively, and is two sets of the equal fixed mounting of one side outer wall that stopper (15) kept away from each other has guide block (14), mounting groove (17) have all been seted up to bottom plate (4) top left and right sides outer wall, peg graft in the inner chamber of mounting groove (17) guide block (14) bottom, and are two sets of fixed mounting has reset spring (18) between one side outer wall that guide block (14) kept away from each other and the one side inner wall that two sets of mounting groove (17) are relative, and are two sets of the equal fixed mounting of one side bottom outer wall that guide block (14) are close to each other has guide bar (16), and is two sets of the one end that guide bar (16) are.

3. The differential gate ejection device for an injection mold of claim 2, wherein: the width outside-in that stopper (15) erected the cross-section reduces gradually, and is two sets of stopper (15) bottom is close to one side outer wall each other and is erected the cross-section and is the arc, and is two sets of the interval between one side outer wall that guide block (14) kept away from each other and the relative one side outer wall of two sets of connecting plates (3) is greater than the width that stopper (15) erected the cross-section.

4. The differential gate ejection device for an injection mold of claim 1, wherein: the outer wall of the top of the upper top plate (11) and the outer wall of the bottom of the lower template (1) are respectively provided with an installation block (20), the installation blocks (20) are fixedly provided with a supporting spring (19), the installation blocks (20) are fixedly provided with an insertion block (21), the insertion blocks (21) are fixedly arranged on the outer wall of one side away from each other, the connection positions of the upper top plate (11), the lower template (1) and the installation blocks (20) are provided with insertion grooves matched with the insertion blocks (21), and the insertion blocks (21) are inserted into the inner cavities of the insertion grooves.

5. The differential gate ejection device for an injection mold of claim 1, wherein: the utility model discloses a bottom plate (4) top left and right sides outer wall all fixed mounting have connecting block (23), connecting groove (24) have been seted up to connecting plate (3) bottom outer wall, and connecting block (23) are pegged graft in the inner chamber of connecting groove (24), jack (25) have been seted up to connecting block (23) outer wall, jack (25) inner chamber runs through to be pegged graft and has inserted bar (26), the equal slidable mounting of inserted bar (26) left and right sides outer wall has fixed block (27), and fixed block (27) outer wall and connecting plate (3) outer wall laminate mutually.

6. The differential gate ejection device for an injection mold of claim 5, wherein: the movable groove has all been seted up to inserted bar (26) upper and lower both sides outer wall, and movable groove inner chamber slidable mounting has carriage release lever (31), both ends respectively with left and right sides fixed block (27) fixed connection about carriage release lever (31), one side outer wall and fixture block fixed connection that carriage release lever (31) are close to inserted bar (26), and the movable groove inner wall seted up with fixture block assorted draw-in groove, inserted bar (26) inner chamber runs through to peg graft has bull stick (33), equal fixed mounting in both ends has carousel (28) about bull stick (33), sleeve pipe (32) and commentaries on classics piece (30) have all been cup jointed at both ends about bull stick (33) outer wall, fixed mounting has between sleeve pipe (32) upper and lower both sides outer wall and upper and lower both sides fixed block (27) promotes spring (29), the perpendicular cross-section of commentaries on classics piece (30) is.

7. The differential gate ejection device for an injection mold of claim 1, wherein: the connecting part of the lower top plate (10) and the product ejector rod (8) is provided with a connecting sleeve (22), the connecting part of the upper top plate (11) and the runner ejector rod (9) is provided with the connecting sleeve (22), the outer wall of the top of the connecting sleeve (22) is provided with a screw hole (34), the bottom ends of the product ejector rod (8) and the runner ejector rod (9) are inserted into an inner cavity of the screw hole (34), and the bottom ends of the outer wall of the product ejector rod (8) and the outer wall of the runner ejector rod (9) are provided with threads.

8. The ejection method of a differential gate ejection device for an injection mold according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:

s1: during injection molding, the upper template (2) moves downwards to contact with the lower template (1), mold closing is carried out, then molten plastic raw materials are injected, and mold opening is carried out after cooling and molding;

s2: the upper die plate (2) rises and is removed from the upper part of the lower die plate (1), then a large jacking rod (12) and a small jacking rod (13) are respectively inserted into the inner cavities of the two groups of through holes, the large jacking rod (12) is firstly contacted with the lower top plate (10) and is upwards pushed, so that a left product ejector rod (8) and a flow channel ejector rod (9) rise, the left product and a flow channel (7) are jacked out, the large jacking rod (12) jacks the lower top plate (10), the small jacking rod (13) enters a hole through the through hole and is contacted with the upper top plate (11), the right flow channel ejector rod (9) is jacked upwards, and the right flow channel (7) is jacked out.