CN219705919U - Gas-assisted forming injection mold - Google Patents

Abstract

The utility model relates to a gas-assisted forming injection mold, which comprises an upper inner mold core, a lower inner mold core and a blowing assembly, wherein the blowing assembly comprises a cylinder, a blowing pipe and a blowing needle, the output end of the cylinder is connected with a gas pipe connector, the gas pipe connector is connected with the blowing needle, the blowing needle penetrates through the lower inner mold core and stretches into a mold cavity, the gas pipe connector is communicated with the blowing pipe, and the blowing pipe is connected with a gas pump; the lower internal mold core is provided with a glue inlet, when glue is injected into the mold cavity through the glue inlet, after injection molding is completed, the air cylinder stretches out and drives the blowing needle to stretch into the mold cavity, then nitrogen is input into the blowing pipe through the air pump, the nitrogen in the blowing pipe is conveyed into the blowing needle through the air pipe connector, and the blowing needle blows to the mold cavity, so that the glue is filled, a certain wall thickness is formed, then pressure maintaining and cooling molding are performed, one-step molding is performed, secondary processing is not needed, and the production efficiency is improved.

Description

Gas-assisted forming injection mold

Technical Field

The utility model relates to the technical field of gas-assisted forming injection molds, in particular to a gas-assisted forming injection mold.

Background

The automobile handle product is molded by injection molding through a gas-assisted molding injection mold, namely, a heated and melted material is injected into a mold cavity for molding under high pressure by an injection molding machine, cooling and solidifying are carried out, and demolding is carried out, but the demolded semi-finished product is required to be hollowed and molded into a finished product, secondary processing is carried out, the production process is complex, and the production efficiency is low.

Disclosure of Invention

The utility model aims to design a gas-assisted molding injection mold, which can realize one-step molding into a finished product without secondary processing, and improves the production efficiency so as to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the mold comprises an upper mold and a lower mold, wherein a plurality of upper inner mold kernels are arranged on the upper mold, a plurality of lower inner mold kernels are arranged on the lower mold, a space between the upper inner mold kernels and the lower inner mold kernels after being assembled is a mold cavity, one side of each lower inner mold kernel is provided with a lower groove, one side of each upper inner mold kernel is provided with an upper groove, and the upper grooves are matched with the lower grooves; the air blowing device comprises an upper groove, an air cylinder, an air pipe and an air blowing needle, and is characterized by further comprising a plurality of air blowing assemblies, wherein the air blowing assemblies comprise an air cylinder, an air blowing pipe and an air blowing needle, the air cylinder is arranged on the upper groove, the output end of the air cylinder is connected with an air pipe connector, the air pipe connector is positioned on the upper groove, the air pipe connector is connected with the air blowing needle, one end of the air blowing needle, which is far away from the air pipe connector, penetrates through the lower inner die core and stretches into a die cavity, the air pipe connector is communicated with the air blowing pipe, and one end of the air blowing pipe, which is far away from the air pipe connector, is connected with an air pump; the lower inner die core is provided with a glue inlet.

Further, two lower mold inserts are arranged at the positions, located in the mold cavities, of the lower inner mold core, the two lower mold inserts are respectively located at two ends of the mold cavities, the lower mold inserts penetrate through the lower inner mold core to directly abut against the bottom ends of the lower inner mold core, and the air blowing needle penetrates through the lower mold inserts and stretches into the mold cavities.

Further, a plurality of inclined guide pillar lateral core-pulling structures are arranged on the lower inner die core, a lateral core of each inclined guide pillar lateral core-pulling structure penetrates through the lower die insert, and each inclined guide pillar lateral core-pulling structure is matched with the lower die insert.

Further, the lower die comprises a bottom plate, a thimble base plate is arranged on the bottom plate, the top end of the thimble base plate is connected with a thimble plate, the thimble base plate is attached to the thimble plate, a thimble is arranged on the thimble base plate, and the thimble sequentially penetrates through the thimble plate and the lower die insert and the surface of the lower die insert are flush.

Further, the bottom of the backing plate of the thimble is connected with a plurality of limit nails.

Further, a hot runner pipe is arranged in the upper die, a feeding port and a plurality of discharging ports are arranged on the hot runner pipe, the discharging ports are all connected with hot runner valve needles, the hot runner valve needles are communicated with a glue inlet runner, and the glue inlet runner is matched with the glue inlet.

Further, the lower groove is connected with a fixed sleeve, the air cylinder is connected with the fixed sleeve, and the output end of the air cylinder and the air pipe connector are respectively located in the fixed sleeve.

Further, an air inlet connector fixed block is arranged on the lower die and is close to the air cylinder, an air inlet of the air inlet connector fixed block is communicated with the air pump, and an air outlet of the air inlet connector fixed block is communicated with the air inlet pipe.

Compared with the prior art, the utility model has the beneficial effects that:

when the mold is used, the upper inner mold core and the lower inner mold core are in a mold closing state, a certain amount of glue stock in a molten state is injected into the mold cavity through the glue inlet, after injection molding is finished, the air cylinder stretches out and drives the blowing needle to stretch into the mold cavity, nitrogen is input into the air blowing pipe through the air pump, the nitrogen in the air blowing pipe is conveyed into the air blowing needle through the air pipe connector, the air blowing needle blows to the mold cavity, so that the glue stock is filled, a certain wall thickness is formed, the air pump is stopped, the air blowing needle stops blowing, pressure maintaining cooling molding is performed, meanwhile, the air cylinder retracts and drives the air blowing needle to retract, finally, the mold is opened, a finished product is formed at one time, secondary processing is not needed, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a schematic view of the upper mold structure of the present utility model;

FIG. 4 is a schematic view of the lower die structure of the present utility model;

fig. 5 is a schematic view of a hot runner tube structure according to the present utility model.

The names of the components marked in the figures are as follows:

1. an upper die; 2. a lower die; 3. an upper inner mold core; 4. a lower inner mold core; 5. a mold cavity; 6. a lower groove; 7. an upper groove; 8. a cylinder; 9. an air blowing pipe; 10. a blowing needle; 11. an air pipe connector; 12. a lower mold insert; 13. a side core pulling structure of the inclined guide post; 14. a side core; 15. a bottom plate; 16. a thimble backing plate; 17. a needle ejection plate; 18. a thimble; 19. a limit nail; 20. a hot runner tube; 21. a feed inlet; 22. a discharge port; 23. a hot runner valve needle; 24. a glue inlet runner; 25. a glue inlet; 26. a fixed sleeve; 27. and an air inlet joint fixing block.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

Examples: referring to fig. 1-5, an air-assisted injection mold comprises an upper mold 1 and a lower mold 2, wherein four upper inner mold cores 3 are arranged on the upper mold 1, lower inner mold cores 4 corresponding to the upper inner mold cores 3 one by one are arranged on the lower mold 2, after mold closing, the upper inner mold cores 3 and the lower inner mold cores 4 are matched to form a mold cavity 5 after mold closing, two lower mold inserts 12 are arranged at the positions of the lower inner mold cores 4, which are positioned at the two ends of the mold cavity 5, respectively, the two lower mold inserts 12 penetrate through the lower inner mold cores 4 and the bottom end flush of the lower inner mold cores 4, a gap is reserved between the top ends of the lower mold inserts 12 and the upper inner mold cores 3, and the mold cavity 5 and the lower mold inserts 12 are combined, so that the shape after injection molding is identical to the shape of a product. One side of the lower inner die core 4 is provided with a lower groove 6, one side of the upper inner die core 3 is provided with an upper groove 7, and the upper groove 7 is matched with the lower groove 6 so as to be placed and moved by an air cylinder 8; the lower die insert 12 is provided with a through hole, when the air cylinder 8 is in an extending state, the air needle 10 extends into the die cavity 5 through the through hole of the lower die insert 12, meanwhile, the air needle 10 is in clearance fit with the through hole, the air needle 10 is convenient to extend into and extend out of the die cavity 5, when the air cylinder 8 is in a retracting state, the air needle 10 extends out of the lower die insert 12, and gas in the die cavity 5 is discharged through the through hole. The lower die 2 is provided with an air inlet connector fixing block 27, the air inlet connector fixing block 27 is close to the position of the air cylinder 8, an air inlet of the air inlet connector fixing block 27 is communicated with the air pump through an air inlet pipe, an air outlet of the air inlet connector fixing block 27 is communicated with the air blowing pipe 9, the air pipe connector 11 is communicated with the air blowing pipe 9, and the air inlet connector fixing block 27 can fix the position of the air blowing pipe 9 so as to prevent the air blowing pipe 9 from swinging due to overlarge air flow. The hot runner pipe 20 is installed in the upper die 1, the hot runner pipe 20 is provided with a feed inlet 21 and four discharge outlets 22, the four discharge outlets 22 correspond to the four die cavities 5, injection molding can be carried out on the four die cavities 5 at the same time, the discharge outlets 22 are connected with a hot runner valve needle 23, the hot runner valve needle 23 is a needle valve type hot runner valve needle, the hot runner valve needle 23 is electrically connected with a controller, the hot runner valve needle 23 is communicated with a glue inlet runner 24, a glue inlet 25 is arranged on the lower inner die core 4, and the glue inlet runner 24 is matched with the glue inlet 25. When the injection molding machine is used, the required quantity of injected sizing material is set, the upper mold 1 and the lower mold 2 are closed, the set sizing material required quantity is injected through the matching of the hot runner pipe 20, the hot runner valve needle 23 and the sizing material inlet runner 24, after the preset required quantity is reached, the injection of the sizing material is stopped, the air cylinder 8 stretches out and drives the air blowing needle 10 to stretch into the mold cavity 5, then nitrogen is input into the air inlet connector fixed block 27 through the air pump, the air inlet connector fixed block 27 is input into the air blowing pipe 9, the nitrogen in the air blowing pipe 9 is conveyed into the air blowing needle 10 through the air pipe connector 11, the air blowing needle 10 blows into the mold cavity 5, so that sizing material filling is completed, an injection molding piece which is hollow and has a certain wall thickness is formed, then the air pump stops, the air blowing needle 10 stops blowing, at the moment, the hollow inside of the injection molding piece forms a certain air pressure, after pressure maintaining and cooling molding, the air cylinder 8 is retracted and drives the air blowing needle 10 to retract, and finally the mold is opened to form a finished product, secondary processing is not needed, and the working efficiency is improved; meanwhile, in the cooling process, as the sizing material is filled and then blown into the hollow cavity, the air pressure in the hollow cavity counteracts the shrinkage caused by cooling, so that the shrinkage mark defect on the outer surface of the product is reduced, the appearance of the product is improved, and the quality of the product is improved.

The lower die core 4 is provided with a plurality of inclined guide pillar lateral core-pulling structures 13, the inclined guide pillar lateral core-pulling structures 13 are conventional technical means adopted for forming a back-off, when the die is closed, a side core 14 of each inclined guide pillar lateral core-pulling structure 13 directly abuts against a lower die insert 12, the inclined guide pillar lateral core-pulling structures 13 are matched with the lower die insert 12, so that a back-off structure is formed after injection molding, an inclined top is further arranged on the lower die 2, the inclined top penetrates through the lower die core 4 and the lower die insert 12 in sequence and is flush with the upper surface of the lower die insert 12, and the inclined top is conventional technical means adopted for forming the back-off and ejecting out a product; the lower die 2 comprises a bottom plate 15, a thimble backing plate 16 is arranged on the bottom plate 15, a thimble plate 17 is connected to the top end of the thimble backing plate 16, the thimble backing plate 16 is attached to the thimble plate 17, a thimble 18 is arranged on the thimble backing plate 16, the thimble 18 sequentially penetrates through the thimble plate 17, the lower die insert 12 directly abuts against the surface of the lower die insert 12, the thimble plate 17 fixes and limits the thimble 18, a plurality of limit nails 19 are connected to the bottom end of the thimble backing plate 16, when the die is opened, the thimble 18, the thimble backing plate 16 and the thimble plate 17 move upwards to assist in demoulding of a formed product, and simultaneously, oblique guide columns of the oblique guide column lateral core pulling structure 13 are driven to retract and drive a side core 14 to retract from a product back-off position, after demoulding of the product is completed, the thimble 18, the thimble backing plate 16 and the thimble plate 17 return until the limit nails 19 abut against the bottom plate 15, namely return is completed, and the limit nails 19 can prevent garbage or waste from falling into the bottom plate 15, so that the thimble 18, the thimble backing plate 16 and the thimble plate 17 cannot return to the place.

The working principle of the embodiment is as follows: when the mold is used, firstly, the sizing material is in a molten state, the demand for injecting the sizing material is set, the upper mold 1 and the lower mold 2 are assembled, the set sizing material demand is injected through the matching of the hot runner pipe 20, the hot runner valve needle 23 and the sizing material inlet runner 24, after the preset demand is reached, the material injection is stopped, the air cylinder 8 stretches out and drives the air blowing needle 10 to stretch into the mold cavity 5, then nitrogen is input into the air inlet joint fixing block 27 through the air pump, the air inlet joint fixing block 27 is input into the air blowing pipe 9, the nitrogen in the air blowing pipe 9 is conveyed into the air blowing needle 10 through the air pipe connector 11, the air blowing needle 10 blows air to the mold cavity 5, the sizing material filling is completed, then the air pump is stopped, the air blowing needle 10 stops blowing, after pressure maintaining and cooling molding, the air cylinder 8 retracts and drives the air blowing needle 10 to retract, finally the mold is opened, the ejector pin 18, the ejector pin 16 and the ejector pin plate 17 are moved upwards, so that the molded product is demolded, and after the product demolding is completed, the ejector pin 18, the ejector pin 16 and the ejector pin plate 17 are reset until the limiting pin 19 and the ejector plate 15 are in a reset mode, and a molding cycle is completed.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper," "lower," "left," "right," "front," "back," and the like are used herein for illustrative purposes only.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (9)

1. The utility model provides a gas assist shaping injection mold, includes mould (1) and bed die (2), be equipped with interior mould benevolence (3) on at least one on last mould (1), be equipped with on bed die (2) with interior mould benevolence (4) down of interior mould benevolence (3) one-to-one, go up interior mould benevolence (3) and cooperation formation die cavity (5) after lower interior mould benevolence (4) compound die, its characterized in that: a lower groove (6) is formed in one side of the lower inner die core (4), an upper groove (7) is formed in one side of the upper inner die core (3), and the upper groove (7) is matched with the lower groove (6); the air blowing device comprises a die cavity (5), and is characterized by further comprising air blowing assemblies in one-to-one correspondence with the die cavity (5), wherein each air blowing assembly is located at one end of the die cavity (5), each air blowing assembly comprises an air cylinder (8), an air blowing pipe (9) and an air blowing needle (10), each air cylinder (8) is installed on each upper groove (7), an air pipe connector (11) is connected to the output end of each air cylinder (8), each air pipe connector (11) is located on each upper groove (7), each air pipe connector (11) is connected with each air blowing needle (10), one end of each air blowing needle (10) away from each air pipe connector (11) penetrates through the corresponding lower inner die core (4) to extend into the die cavity (5), each air pipe connector (11) is communicated with each air blowing pipe (9), and one end of each air blowing pipe (9) away from each air pipe connector (11) is connected with an air pump; the lower inner die core (4) is provided with a glue inlet (25).

2. The gas assist molding injection mold according to claim 1, wherein: the lower internal mold core (4) is provided with two lower mold inserts (12) at the positions of the mold cavities (5), the two lower mold inserts (12) are respectively positioned at two ends of the mold cavities (5), the lower mold inserts (12) penetrate through the lower internal mold core (4) and the bottom end of the lower internal mold core (4) in parallel, and the air blowing needle (10) penetrates through the lower mold inserts (12) and stretches into the mold cavities (5).

3. The gas assist molding injection mold according to claim 2, wherein: the lower inner die core (4) is provided with a plurality of inclined guide pillar lateral core-pulling structures (13), a lateral core (14) of each inclined guide pillar lateral core-pulling structure (13) penetrates through the lower die insert (12), and each inclined guide pillar lateral core-pulling structure (13) is matched with the lower die insert (12).

4. The gas assist molding injection mold according to claim 2, wherein: the lower die (2) comprises a bottom plate (15), a thimble base plate (16) is arranged on the bottom plate (15), a thimble (18) is arranged on the thimble base plate (16), and the thimble (18) penetrates through the lower die insert (12) and is flush with the surface of the lower die insert (12).

5. The gas assist molding injection mold of claim 4, wherein: the top of thimble backing plate (16) is connected with thimble board (17), thimble backing plate (16) with thimble board (17) laminating, thimble (18) run through in proper order thimble board (17) lower mould mold insert (12) with the surface parallel and level of lower mould mold insert (12).

6. The gas assist molding injection mold of claim 4, wherein: the bottom end of the thimble backing plate (16) is connected with a plurality of limit nails (19).

7. The gas assist molding injection mold according to claim 1, wherein: install hot runner pipe (20) in last mould (1), be equipped with feed inlet (21) and a plurality of discharge gate (22) on hot runner pipe (20), discharge gate (22) all are connected with hot runner needle (23), hot runner needle (23) intercommunication has into gluey mouth runner (24) intercommunication, into gluey mouth runner (24) with advance gluey mouth (25) cooperation.

8. The gas assist molding injection mold according to claim 1, wherein: the lower groove (6) is connected with a fixed sleeve (26), the air cylinder (8) is connected with the fixed sleeve (26), and the output end of the air cylinder (8) and the air pipe connector (11) are both positioned in the fixed sleeve (26).

9. The gas assist molding injection mold according to claim 1, wherein: be equipped with on bed die (2) and advance air connector fixed block (27), advance air connector fixed block (27) and be close to cylinder (8), advance the air inlet of air connector fixed block (27) through the intake pipe with the air pump intercommunication, advance the gas outlet of air connector fixed block (27) with blow pipe (9) intercommunication.