CN111688119B

CN111688119B - Injection mold structure

Info

Publication number: CN111688119B
Application number: CN202010405951.2A
Authority: CN
Inventors: 周斌
Original assignee: Foshan Huoer Mould Co ltd
Current assignee: Foshan Huoer mould Co.,Ltd.
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2022-02-18
Anticipated expiration: 2040-05-14
Also published as: CN111688119A

Abstract

The invention relates to the technical field of molds and discloses an injection mold structure which comprises a lower mold base, wherein a hydraulic device is fixedly installed at the bottom of the lower mold base. This injection mold structure, a space and an air hole intercommunication between die holder and the lower mould core through the cooperation installation, when boss and negative pressure groove cooperation, the air in the negative pressure inslot can get into heavy inslot through an air hole one, when molten plastics need cooling shaping, carry out the heat exchange through setting up the cooling hole near heavy groove and make the die holder cooling, air in heavy inslot after the heat conduction of molten plastics meets cold meeting condensation, thereby make and form the negative pressure in the heavy inslot, cause briquetting compression spring to move down, it moulds the piece to form the negative pressure attraction in the negative pressure hole, when making to peel off and mould the piece, can make and mould a adhesion at lower mould core surface, the cooling temperature who has solved needs control both sides comes to mould the problem that the piece peeled off the adhesion, it is more abundant simple to make to mould a cooling.

Description

Injection mold structure

Technical Field

The invention relates to the technical field of molds, in particular to an injection mold structure.

Background

The invention relates to a mould, which is an important process device in modern industry, is an indispensable component in the production of a plurality of industrial products, is used for obtaining various moulds and tools of required products by injection molding, blow molding, extrusion, die casting or forging and pressing molding, is a tool for manufacturing molded articles, realizes the processing of the appearance of the articles mainly by changing the physical state of the molded materials, can mark the types of plastic processing moulds corresponding to different process requirements according to different molding methods, mainly comprises an injection molding mould, an extrusion molding mould, a compression molding mould, a blow molding mould, a plastic sucking molding mould and the like, and is an injection molding mould.

In the existing injection mold, an upper cavity plate and a lower cavity plate are tightly attached through a guide pillar to form a mold cavity, molten plastic is injected into a pouring channel to fill the mold cavity, the molten plastic is not injected after the filling is finished, the filled plastic is cooled, a plastic part is formed after the cooling, the upper cavity plate and the lower cavity plate are separated, an ejection mechanism works to eject and separate the plastic part adhered to the lower cavity plate, and one plastic part is processed.

According to the injection mold, after a plastic part is cooled and formed, the cooling temperature difference of two sides needs to be controlled, so that the plastic part can be higher in bonding force on the inner wall of the movable mold, the plastic part is separated from the fixed mold along with the movement of the movable mold, the temperature difference needs to accurately inject the temperature of water, the heat conductivity coefficient of the mold needs to be controlled, and the manufacturing is difficult; even if the temperature difference is utilized to make the bonding force between the plastic part and the inner wall of the fixed die become small, a certain bonding effect is still achieved, when the upper and lower cavity plates are separated, the plastic part can be torn, the formed plastic part is damaged, and therefore the yield of die production is reduced.

Disclosure of Invention

The invention provides an injection mold structure which has the advantages that a plastic part is separated from the movable mold and is easily adhered to the movable mold, and the plastic part is separated from the movable mold and is not easily torn, and the problems that one side of the plastic part is difficult to adhere and the plastic part is separated from the movable mold and is easily torn due to temperature difference control are solved.

The invention provides the following technical scheme: an injection mold structure comprises a lower die holder, wherein a hydraulic device is fixedly mounted at the bottom of the lower die holder, a spring is fixedly mounted in the middle of the upper surface of the lower die holder, a pressing block is fixedly mounted at the top end of the spring, a lower die core is fixedly mounted on the upper surface of the lower die holder through a bolt, a sinking groove is formed in the middle of the bottom of the lower die core, bosses are integrally formed around the upper surface of the lower die core, a first air hole is formed in the boss and penetrates through the sinking groove, a negative pressure hole is formed in the middle of the upper surface of the lower die core and penetrates through the sinking groove, the pressing block is sleeved with the sinking groove in a matched mode, an upper die core is matched with the upper surface of the lower die core, a negative pressure groove is formed around the lower surface of the upper die core, the boss is in close sliding fit with the negative pressure groove, a die cavity is formed in the middle of the lower die core and the upper die core after the lower die core is matched with the upper die core, and an upper die holder is movably sleeved with the upper die holder, the upper die core and the upper die base are movably sleeved, a limiting block is fixed to the lower portion of the two sides of the inner groove of the upper die base through a bolt, a cooling hole is formed in the upper die base and the inner portion of the lower die base, an injection molding hole is formed in the upper die base and the middle of the upper die core in a communicating mode, one side, located in the injection molding hole, of the inner portion of the upper die base penetrates through the inner groove of the upper die base and is provided with a second air hole, a cutting column is arranged in the inner portion of the upper die base and is in communication with the injection molding hole in a sliding mode, a pressure spring is fixedly installed at one end, far away from the injection molding hole, of the cutting column, a fixing column is fixedly installed at the other end of the pressure spring, and the fixing column and the upper die base are in interference fit.

Preferably, the top of the inner groove of the upper die base protrudes downwards, and the injection molding hole penetrates through the protruding bottom and is matched with the groove in the top of the upper die core.

Preferably, the cooling hole in the lower die base is close to the sinking groove, and the water pipe connected with the cooling hole outwards is a stretchable water pipe.

Preferably, the top of the pressing block is provided with a cylinder matched with the negative pressure hole.

Preferably, only one air hole is formed in the second air hole, and the first air holes are uniformly distributed in the boss.

Preferably, the injection molding holes are communicated with the upper part of the upper die base in a staggered mode, and the cutting columns are located at the staggered positions of the injection molding holes.

The invention has the following beneficial effects:

1. this injection mold structure, a space and an air hole intercommunication between die holder and the lower mould core through the cooperation installation, when boss and negative pressure groove cooperation, the air in the negative pressure inslot can get into heavy inslot through an air hole one, when molten plastics need cooling shaping, carry out the heat exchange through setting up the cooling hole near heavy groove and make the die holder cooling, air in heavy inslot after the heat conduction of molten plastics meets cold meeting condensation, thereby make and form the negative pressure in the heavy inslot, cause briquetting compression spring to move down, it moulds the piece to form the negative pressure attraction in the negative pressure hole, when making to peel off and mould the piece, can make and mould a adhesion at lower mould core surface, the cooling temperature who has solved needs control both sides comes to mould the problem that the piece peeled off the adhesion, it is more abundant simple to make to mould a cooling.

2. This injection mold structure, through the last mold core that closely slides in the upper die base inside, and the sliding fit of boss and negative pressure groove, make to go up the mold core and move down, there is the negative pressure between last mold core and the upper die base to make up the power, when the lower mold core moves down, there is the negative pressure of a negative pressure inslot, make lower mold core and last mold core in the course of separating, the separation of lower mold core and last mold core has the damping action under two negative pressure effects, have the cushioning effect to the piece of moulding of peeling off, prevent the direct part of lower mold core and last mold core, can cause the tearing problem of moulding, guarantee to peel off the piece integrity of moulding, improve the yields of moulding.

Drawings

FIG. 1 is a schematic perspective sectional view of an explosive structure according to the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention.

In the figure: 1. a lower die holder; 2. a hydraulic device; 3. a spring; 4. briquetting; 5. a lower mold core; 6. sinking a groove; 7. a boss; 8. a first air hole; 9. a negative pressure hole; 10. an upper mold core; 11. a negative pressure tank; 12. a mold cavity; 13. an upper die holder; 14. a limiting block; 15. a cooling hole; 16. injection molding holes; 17. a second air hole; 18. cutting off the column; 19. a pressure spring; 20. and (5) fixing the column.

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.

Referring to fig. 1-3, an injection mold structure comprises a lower mold base 1, a hydraulic device 2 is fixedly installed at the bottom of the lower mold base 1, a spring 3 is fixedly installed at the middle of the upper surface of the lower mold base 1, a press block 4 is fixedly installed at the top end of the spring 3, a lower mold core 5 is fixedly installed on the upper surface of the lower mold base 1 through a bolt, a sink groove 6 is formed in the middle of the bottom of the lower mold core 5, a boss 7 is integrally formed around the upper surface of the lower mold core 5, an air hole 8 is formed in the boss 7, the air hole 8 penetrates through the sink groove 6, a negative pressure hole 9 is formed in the middle of the upper surface of the lower mold core 5 and penetrates through the sink groove 6, the press block 4 is matched and sleeved with the sink groove 6, an upper mold core 10 is matched with the upper surface of the lower mold core 5, a groove 11 is formed in the periphery of the lower surface of the upper mold core 10, the boss 7 is closely matched with the negative pressure groove 11 in a sliding manner, and a mold cavity 12 is formed in the middle of the lower mold core 5 and the upper mold core 10 after being matched with each other, the upper surface movable sleeve of die holder 1 is equipped with upper die base 13, upper die core 10 and upper die base 13 movable sleeve dress, the lower part bolt fastening of upper die base 13 inside groove both sides has spacing piece 14, upper die base 13 has seted up cooling hole 15 with the inside of die holder 1, upper die base 13 has seted up injection molding hole 16 with the middle part intercommunication of upper die core 10, one side that the inside of upper die base 13 just is located injection molding hole 16 link up to upper die base 13 inside groove and has seted up gas pocket two 17, the inside of upper die base 13 just communicates slidable mounting with injection molding hole 16 and has cut off post 18, the one end fixed mounting that the injection molding hole 16 was kept away from to cut off post 18 has pressure spring 19, the other end fixed mounting of pressure spring 19 has fixed column 20, fixed column 20 and upper die base 13 interference suit.

Wherein, the top of upper die base 13 inside groove is the protrusion downwards, and the convex bottom is link up to injection molding hole 16, with the recess cooperation at last mold core 10 top, through complex last mold core 10 and upper die base 13 for when last mold core 10 slides in upper die base 13, injection molding hole 16 in the upper die base 13 can with the fine cooperation in the injection molding hole 16 in last mold core 10, prevent the cooperation dislocation, and the molten plastics passes through the gap and gets into 13 inside grooves of upper die base.

Wherein, cooling hole 15 in the die holder 1 is close to heavy groove 6, and the water pipe of the outside connection of cooling hole 15 can tensile water pipe, through being close to cooling hole 15 that heavy groove 6 set up, can conduct the upper surface of die holder 1 and the hot air heat transfer condensation in the heavy groove 6 with minimum temperature, guarantees that the negative pressure in the heavy groove 6 reaches the biggest, and the tensile water pipe of connection simultaneously can guarantee that removal and upper die base 13 that die holder 1 can be normal cooperate.

Wherein, the top of briquetting 4 is provided with the cylinder with negative pressure hole 9 complex for in-process of moulding plastics, can prevent that melting plastics from getting into the inside in negative pressure hole 9, cause to mould a surface not smooth, guarantee to mould a shaping rule.

Wherein, the air hole two 17 is only one, and the air hole one 8 evenly distributed is in the inside of boss 7, through the air hole two 17 and the air hole one 8 that set up, the different air outlet flow of control for the negative pressure between last mold core 10 and the upper die base 13 is greater than the negative pressure that boss 7 and negative pressure groove 11 cooperation produced, makes last mold core 10 before moving down and contacting stopper 14, boss 7 and negative pressure groove 11 can separate, guarantees the damping effect of the separation of mold core 5 and last mold core 10 down, and can separate smoothly.

The injection molding holes 16 are communicated with the upper portion of the upper die base 13 in a staggered mode, the cutting columns 18 are located at staggered positions of the injection molding holes 16, and the cutting columns 18 are installed in the staggered positions of the injection molding holes 16 in a matched mode, so that the die can not absorb molten plastic through the injection molding holes 16 due to negative pressure generated in the downward moving process of the upper die core 10, the molten plastic is prevented from entering the inner cavity of the upper die base 13, the negative pressure sealing effect of the inner cavity of the upper die base 13 is guaranteed, and plastic is guaranteed not to be wasted.

The working principle of the die structure of the invention is as follows:

the hydraulic device 2 is utilized to push the lower die holder 1 to move upwards, the lower die core 5 is contacted with the upper die core 10 to push the upper die core 10 to move upwards, the boss 7 is matched with the negative pressure groove 11, air in the negative pressure groove 11 is extruded to the position of the sink groove 6 through the air hole I8, air between the upper die core 10 and the upper die holder 13 is discharged through the air hole II 17 until the lower die holder 1 is completely matched with the upper die holder 13, the matching of an inner groove of the upper die holder 13 and the limiting block 14 can limit the sliding matching of the lower die core 5 and the upper die core 10, the die cavity 12 is tightly matched, molten plastic is injected through the injection hole 16, the high-pressure molten plastic pushes the cutting column 18 to compress the pressure spring 19 to move leftwards, after the die cavity 12 is filled, the pressure spring 19 is not injected, the cutting column 18 returns elastically, cooling water flows into the cooling hole 15 to cool the die, heated air in the sink groove 6 is cooled to form negative pressure, and plastic parts contacted with the upper surface of the lower die core 5 are sucked, then the hydraulic device 2 works to pull back the lower die holder 1, the lower die core 5 and the upper die core 10 move downwards, the negative pressure above the upper die core 10 is unequal to the negative pressure in the negative pressure groove 11, the lower die core 5 and the upper die core 10 are separated to have a damping effect, the die cavity 12 is separated from the negative pressure groove 11, so that the negative pressure in the sink groove 6 disappears, and the press block 4 returns to push the air in the negative pressure hole 9 to move upwards so that the plastic part bonded on the surface of the lower die core 5 is separated.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 an injection mold structure, includes die holder (1), its characterized in that: the die comprises a die holder (1), a hydraulic device (2) is fixedly mounted at the bottom of the die holder (1), a spring (3) is fixedly mounted in the middle of the upper surface of the die holder (1), a pressing block (4) is fixedly mounted at the top end of the spring (3), a lower die core (5) is fixedly mounted on the upper surface of the die holder (1), a sinking groove (6) is formed in the middle of the bottom of the lower die core (5), bosses (7) are integrally formed on the periphery of the upper surface of the lower die core (5), air holes (8) are formed in the bosses (7), the air holes (8) penetrate through the sinking groove (6), negative pressure holes (9) are formed in the middle of the upper surface of the lower die core (5) and penetrate through the sinking groove (6), the pressing block (4) is matched and sleeved with the sinking groove (6), an upper die core (10) is matched with the upper surface of the lower die core (5), and a negative pressure groove (11) is formed in the periphery of the lower surface of the upper die core (10), the die comprises a boss (7), a negative pressure groove (11), a lower die core (5), an upper die core (10), an upper die base (13), an upper die base (10), an injection molding hole (16), an inner groove and an air hole II (17), wherein the boss (7) is in close sliding fit with the negative pressure groove (11), the middle part of the lower die core (5) is matched with the upper die core (10) to form a die cavity (12), the upper surface of the lower die base (1) is movably sleeved with the upper die base (13), the lower parts of the two sides of the inner groove of the upper die base (13) are fixed with a limiting block (14) through bolts, the inner parts of the upper die base (13) and the lower die base (1) are provided with cooling holes (15), the middle parts of the upper die base (13) and the upper die core (10) are communicated with each other to form the injection molding hole (16), one side, which is positioned in the injection molding hole (16), in the upper die base (13) is communicated with the injection molding hole (16) and is provided with a cutting column (18), one end of the cutting column (18), which is far away from the injection molding hole (16), is fixedly provided with a pressure spring (19), the other end of the pressure spring (19) is fixedly provided with a fixing column (20), the fixing column (20) is in interference fit with the upper die base (13), the top of the pressing block (4) is provided with a cylinder matched with the negative pressure hole (9), only one air hole II (17) is provided, the air holes I (8) are uniformly distributed in the boss (7), the injection molding holes (16) are communicated with the upper portion of the upper die base (13) in a staggered mode, and the cutting column (18) is located at the staggered position of the injection molding holes (16).

2. An injection mold structure according to claim 1, wherein: the top of the inner groove of the upper die holder (13) protrudes downwards, and the injection molding hole (16) penetrates through the bottom of the protrusion and is matched with the groove in the top of the upper die core (10).

3. An injection mold structure according to claim 1, wherein: the cooling holes (15) in the lower die holder (1) are close to the sink (6), and the water pipes connected with the cooling holes (15) outwards are stretchable water pipes.