CN114083765A - Large thin-wall injection mold with complex-shell core-pulling hot runner and injection molding process thereof - Google Patents
Large thin-wall injection mold with complex-shell core-pulling hot runner and injection molding process thereof Download PDFInfo
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- CN114083765A CN114083765A CN202111317350.7A CN202111317350A CN114083765A CN 114083765 A CN114083765 A CN 114083765A CN 202111317350 A CN202111317350 A CN 202111317350A CN 114083765 A CN114083765 A CN 114083765A
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- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 238000001746 injection moulding Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 238000003825 pressing Methods 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 15
- 239000012768 molten material Substances 0.000 claims description 5
- 230000001174 ascending effect Effects 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000005429 filling process Methods 0.000 abstract description 8
- 239000000284 extract Substances 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 description 14
- 239000000243 solution Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000001802 infusion Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/34—Moulds having venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
Abstract
The invention discloses a large thin-wall injection mold with a complex core-pulling hot runner for a shell and an injection molding process thereof, belonging to the technical field of injection molds, wherein a plurality of sealing mechanisms which are uniformly distributed are arranged at the inner side of a driving mold, a pressing mechanism and a control mechanism are arranged at one side of the driving mold, limiting grooves are arranged at two sides of a limiting cylinder, a limiting block is connected in the limiting cylinder in a sliding manner, two ends of the limiting block are respectively provided with an extending cylinder, the far end of the extending cylinder is provided with a sealing block, the limiting block rises and falls in the limiting cylinder, the elongated cylinder can be rotated by utilizing the limiting groove, in the material filling process, the forming hole extracts the air in the cavity between the driving die and the driven die to assist the material to be quickly filled, and in the filling process, the forming hole is sequentially sealed, can accomplish the material and fill, avoid leading to the unable quick filling of material and reducing product quality's problem because the casing is complicated.
Description
Technical Field
The invention belongs to the technical field of injection molds, and particularly relates to a thin-wall large injection mold with a complex-shell core-pulling hot runner and an injection molding process thereof.
Background
The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate sizes, and the injection molding is a processing method used in batch production of parts with complex shapes.
Chinese patent (CN110142935B) discloses a pouring device for a precise and complex injection mold, which can infuse a molten material into a cavity after mold closing through the action of an outer worm gear rod and infuse the material in the outer worm gear rod for a second time through the action of an inner worm gear rod by the design of an infusion device so that the material can more fully enter the complex cavity and the quality of a product is improved, and the pouring device for the precise and complex injection mold can utilize the pressure in an enlarged cavity to move a baffle plate to the right side when the cavity is infused for the second time through the matching of an inner valve of the infusion device, thereby when a certain pressure is reached, the baffle plate can seal a first conveying pipeline and drive a valve core to seal a second conveying pipeline, thereby ensuring the pressure in the cavity during injection molding and automatically stopping infusion, thereby avoiding the disqualification of the product caused by the pressure and time, the material is filled mainly through high-pressure injection in the design, but to some products with special and complicated shapes, even high-pressure injection can not be performed with rapid filling, and then the bottom material is firstly cooled when the material is filled, on one hand, the resistance received when the material is filled can be increased, the energy consumption is increased, on the other hand, the material distribution is not uniform when the material is finally formed, the product quality is reduced, and the improvement is needed in view of the above.
Disclosure of Invention
The invention aims to: the large injection mold with the complex-shell core-pulling hot runner thin wall and the injection molding process thereof are provided for solving the problems that the traditional injection mold cannot perform rapid filling even if high-pressure injection is performed on some products with special and complex shapes, and further bottom materials are cooled first when the materials are filled, on one hand, resistance borne by the materials during filling can be increased, and energy consumption is increased, and on the other hand, the materials are not uniformly distributed during final molding.
In order to achieve the purpose, the invention adopts the following technical scheme: a large thin-wall injection mold with a complex core-pulling hot runner and a complex core-pulling hot runner shell and an injection process of the large thin-wall injection mold comprise a passive mold and an active mold, wherein the passive mold is provided with a feeding hole, the active mold is provided with a plurality of forming holes which are uniformly distributed, the inner side of the active mold is provided with a plurality of sealing mechanisms which are uniformly distributed, one side of the active mold is provided with a pressing mechanism, and one side of the active mold is provided with a control mechanism;
sealing mechanism includes spacing cylinder, spacing groove has been opened to spacing cylinder both sides, the inside sliding connection of spacing cylinder has the stopper, the stopper both ends are equipped with the extension cylinder respectively, extension cylinder sliding connection is in spacing inslot portion, extension cylinder distal end is equipped with sealed piece, the spacing cylinder outside is equipped with seal assembly.
As a further description of the above technical solution: through stopper rising and falling in spacing cylinder inside, can utilize the spacing groove to rotate the extension cylinder, sealed piece is vertical to break away from the shaping hole when the stopper rises, later continue to rise to rotate and make sealed piece break away from the shaping hole completely, make and take out the inside gas of initiative mould and passive mould through the shaping hole at the injection material in-process, inside filling the cavity with auxiliary material, and utilize control mechanism to seal the shaping hole in proper order, inside control mechanism can open the initiative mould after accomplishing the material is filled, make the air current run through inside with auxiliary material cooling shaping of initiative mould.
Further, seal assembly includes sliding connection in the ring that rises and falls in the spacing cylinder outside, open the spacing cylinder both sides and have played the groove, it is equipped with sliding connection in the turning block of the inslot portion that rises to fall to play the ring both ends, the stopper both sides are opened and are had the rotation groove, the inboard rotation of turning block is connected with the rotation wheel that rolls in the inslot portion that rotates, pressing means is including pressing the clamp plate, it is fixed with two adjacent seal assembly's the ring that rises and falls respectively to press the clamp plate both ends, it is equipped with a plurality of telescopic links of pressing according to the clamp plate outside, it is inboard that the telescopic link distal end is fixed in the initiative mould to press, it is equipped with the pressure spring to press the telescopic link outside, it is fixed with pressing the telescopic link both ends respectively to press the spring both ends, it is connected with a plurality of pressing the cylinder to rotate in the middle part of the clamp plate.
As a further description of the above technical solution: control mechanism will press the board top to rise under the normal condition, can rise to rise and fall the ring lifting and make sealed piece break away from the shaping hole, utilizes control mechanism to take the inside air of cavity between with the passive mould of initiative mould out at the material filling in-process and packs with the auxiliary material to from up sealing down in proper order the shaping hole in the material filling in-process, can cool off the shaping after accomplishing the packing.
Furthermore, the control mechanism comprises a control block which is connected to one side of the driving die in a sliding manner, an opening which is attached to the control block is formed in the upper side of the driving die, a control inclined block is arranged at the lower end of the control block, two control rods are connected to the inner side of the driving die in a sliding manner, a passive block is arranged on the outer sides of the control rods, driving blocks are arranged on two sides of the control block, a driving assembly is arranged at the upper end of the driving die, a sealing assembly is arranged on the upper side of the driving die, a cooling assembly is arranged on the lower side of the driving die and comprises a sealing plate, one side of the sealing plate is rotatably connected to the upper side of the driving die, a plurality of sealing plates are arranged on one side of the sealing plate, the far ends of the sealing plates are rotatably connected with upper deflecting rods, the far ends of the upper deflecting rods are rotatably connected to the upper ends of the control rods, the cooling assembly comprises cooling plates, and one side of the cooling plates is rotatably connected to the lower side of the driving die, the cooling plate outside is equipped with a plurality of cooling springs, the cooling spring distal end is fixed in the initiative mould inboard, it has the air intake to open the initiative mould downside, the air intake outside is equipped with the air-supply line, the air-supply line links to each other with current air-blower output, cooling plate outside sliding connection has lower deflection pole, lower deflection pole distal end is rotated and is connected in the control lever lower extreme, control block one side is opened there is the air outlet duct.
As a further description of the above technical solution: utilize drive assembly to rise and descend in order to accomplish the control block, the ascending in-process of control block releases in proper order and accomplishes the sealed piece to the shaping hole's of pressing the pressing plate, the ascending in-process of control block simultaneously takes initiative mould and the inside air of passive mould cavity out, the control lever is played by the jacking when the control block reachs the top and makes the sealed of closing plate completion top shaping hole, open the cooling plate simultaneously, the control air-blower blows in the initiative mould inside with the air current, and discharge from the air-out duct, the completion is to the cooling shaping of material.
Further, drive assembly includes two drive lead screws, the initiative mould upper end is equipped with the carriage, drive lead screw both ends are rotated respectively and are connected in the inboard of carriage and the initiative mould upside, the control block both sides respectively with two drive lead screw threaded connection, two driving motor are installed in the carriage outside, the driving motor output is connected fixedly with the drive lead screw.
As a further description of the above technical solution: the control driving motor is controlled to drive the driving screw rod to rotate, and the control block can be lifted and pressed down.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the limit block rises and falls in the limit cylinder, the limit groove can be used for rotating the extension cylinder, the sealing block is vertically separated from the forming hole when the limit block rises, then the sealing block is continuously lifted and rotated to be completely separated from the forming hole, the sealing block can be controlled to enter the forming hole to complete sealing when the sealing block is pressed down, in the material filling process, the forming hole extracts gas in a cavity between the driving die and the driven die to assist the material to be quickly filled, in addition, the forming holes are sequentially sealed in the filling process, the material filling can be completed, and the problem that the product quality is reduced because the material cannot be quickly filled due to the complex shell is avoided.
2. According to the invention, after the material enters the cavity between the active mold and the passive mold and is filled, the control mechanism opens the cooling plate to enable the cooling plate to incline, air is blown into the active mold by the blower, the cooling plate plays a role in guiding the air flow to enable the air flow to pass through one side, close to the material, of the interior of the active mold, then the air flow is discharged through the air outlet groove, and the effect of quickly cooling and molding the material is achieved by the air flow.
3. According to the invention, the driving screw rod is driven by the driving motor, the control block can be lifted and lowered under the threaded connection effect of the driving screw rod and the control block, the air-extracting auxiliary material in the cavity is automatically filled in the lifting process, meanwhile, the forming holes are sequentially sealed from bottom to top, the cooling plate is automatically opened after the filling is finished, air flow is introduced into the driving die by the air blower for rapid cooling, the operation is simple and convenient, and the use cost is not obviously increased.
Drawings
Fig. 1 is a schematic perspective view of a large thin-walled injection mold with a complicated core-pulling hot runner and a complex casing.
Fig. 2 is a schematic view of an internal three-dimensional structure of an active mold in a large injection mold with a complex-casing core-pulling hot runner thin wall.
Fig. 3 is a schematic structural view of a sealing mechanism in a large injection mold with a complex core-pulling hot runner thin wall of a shell.
Fig. 4 is a schematic view of a three-dimensional structure of a limiting cylinder and a limiting block in a large thin-wall injection mold with a complex core-pulling hot runner shell.
Fig. 5 is a schematic structural view of an internal control mechanism of an active mold in a large injection mold with a complex core-pulling hot runner thin wall of a shell.
FIG. 6 is a schematic diagram of a control block in a control mechanism of a large injection mold with a complex core-pulling hot runner and a complex casing, which is lifted to the top end.
Fig. 7 is an enlarged structural schematic diagram of a position a in a large injection mold with a complex-casing core-pulling hot runner thin wall.
Fig. 8 is an enlarged structural schematic diagram of a position B in a large injection mold with a complex-casing core-pulling hot runner thin wall.
Fig. 9 is an enlarged structural schematic diagram of a position C in a large injection mold with a complex-casing core-pulling hot runner thin wall.
Illustration of the drawings:
1. a passive mold; 2. an active mold; 3. a feeding hole; 4. forming holes; 5. a sealing mechanism; 6. a pressing mechanism; 7. a control mechanism; 8. a limiting cylinder; 9. a limiting groove; 10. a limiting block; 11. an elongated cylinder; 12. a sealing block; 13. a seal assembly; 14. a lifting ring; 15. a lifting and falling groove; 16. rotating the block; 17. a rotating groove; 18. a rotating wheel; 19. a pressing plate; 20. pressing the telescopic rod; 21. a pressing spring; 22. pressing the cylinder; 23. a control block; 24. controlling the inclined block; 25. a control lever; 26. a passive block; 27. an active block; 28. a drive assembly; 29. a closure assembly; 30. a cooling assembly; 31. a closing plate; 32. an upper deflection bar; 33. a cooling plate; 34. cooling the spring; 35. an air inlet; 36. an air inlet pipe; 37. a lower deflection rod; 38. an air outlet groove; 39. driving the screw rod; 40. a driving frame; 41. the motor is driven.
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. 1-9, the present invention provides a technical solution: a large thin-wall injection mold with a complex-shell core-pulling hot runner and an injection process thereof comprise a passive mold 1 and an active mold 2, wherein the passive mold 1 is provided with a feeding hole 3, the active mold 2 is provided with a plurality of uniformly-distributed forming holes 4, the inner side of the active mold 2 is provided with a plurality of uniformly-distributed sealing mechanisms 5, one side of the active mold 2 is provided with a pressing mechanism 6, and one side of the active mold 2 is provided with a control mechanism 7;
the sealing mechanism 5 comprises a limiting cylinder 8, limiting grooves 9 are formed in two sides of the limiting cylinder 8, a limiting block 10 is connected inside the limiting cylinder 8 in a sliding mode, extension cylinders 11 are arranged at two ends of the limiting block 10 respectively, the extension cylinders 11 are connected inside the limiting grooves 9 in a sliding mode, a sealing block 12 is arranged at the far ends of the extension cylinders 11, and a sealing assembly 13 is arranged on the outer side of the limiting cylinder 8;
referring to fig. 1-4, the embodiments are: the extension cylinder 11 can be rotated by utilizing the limiting groove 9 through the rising and falling of the limiting block 10 in the limiting cylinder 8, the sealing block 12 is vertically separated from the forming hole 4 when the limiting block 10 rises, then the sealing block 12 is continuously lifted and rotated to be completely separated from the forming hole 4, so that the air in the driving mold 2 and the driven mold 1 is pumped out through the forming hole 4 in the process of injecting materials, so as to assist the materials to be filled into the cavity, the forming hole 4 is sequentially sealed by utilizing the control mechanism 7, the inside of the driving mold 2 can be opened by the control mechanism 7 after the materials are filled, so that the air flow penetrates through the inside of the driving mold 2 to assist the cooling and forming of the materials, the sealing block 12 can be rotated to the upper side of the forming hole 4 and pressed down to enter the inside of the forming hole 4 to finish the sealing of the forming hole 4 when the limiting block 10 falls, the air in the cavity between the driving mold 2 and the driven mold 1 is pumped out through the forming hole 4 in the material filling process, in addition, the forming holes 4 are automatically closed before the materials reach the corresponding forming holes 4 in the material filling process, so that the materials are prevented from flowing out of the forming holes 4;
the sealing assemblies 13 comprise lifting rings 14 connected to the outer sides of the limiting cylinders 8 in a sliding manner, lifting grooves 15 are formed in two sides of the limiting cylinders 8, rotating blocks 16 connected to the inner portions of the lifting grooves 15 in a sliding manner are arranged at two ends of the lifting rings 14, rotating grooves 17 are formed in two sides of the limiting blocks 10, rotating wheels 18 rolling in the rotating grooves 17 are connected to the inner sides of the rotating blocks 16 in a rotating manner, the pressing mechanism 6 comprises a pressing plate 19, two ends of the pressing plate 19 are respectively connected and fixed with the lifting rings 14 of two adjacent sealing assemblies 13, a plurality of pressing telescopic rods 20 are arranged on the outer sides of the pressing plate 19, the far ends of the pressing telescopic rods 20 are fixed to the inner side of the driving die 2, pressing springs 21 are arranged on the outer sides of the pressing telescopic rods 20, two ends of the pressing springs 21 are respectively connected and fixed with two ends of the pressing telescopic rods 20, and a plurality of pressing cylinders 22 are connected to the middle portions of the pressing plates 19 in a rotating manner;
please refer to fig. 5-9, which illustrate embodiments of the present invention: under normal conditions, the control mechanism 7 lifts the pressing plate 19, namely the lifting ring 14 is lifted to enable the sealing block 12 to be separated from the forming hole 4, air in the cavity between the driving die 2 and the driven die 1 is pumped out by the control mechanism 7 in the material filling process to assist material filling, the forming hole 4 is sequentially sealed from bottom to top in the material filling process, and cooling forming can be carried out after filling is completed;
the control mechanism 7 comprises a control block 23 connected to one side of the driving mold 2 in a sliding manner, an opening attached to the control block 23 is formed in the upper side of the driving mold 2, a control inclined block 24 is arranged at the lower end of the control block 23, two control rods 25 are connected to the inner side of the driving mold 2 in a sliding manner, a driven block 26 is arranged on the outer side of each control rod 25, driving blocks 27 are arranged on two sides of the control block 23, a driving assembly 28 is arranged at the upper end of the driving mold 2, a sealing assembly 29 is arranged on the upper side of the driving mold 2, a cooling assembly 30 is arranged on the lower side of the driving mold 2, the sealing assembly 29 comprises a sealing plate 31, one side of the sealing plate 31 is rotatably connected to the upper side of the driving mold 2, a plurality of sealing plates 31 are arranged on one side of the sealing plate 31, the far end of each sealing plate 31 is rotatably connected with an upper deflecting rod 32, the far end of each upper deflecting rod 32 is rotatably connected to the upper end of each control rod 25, each cooling assembly 30 comprises a cooling plate 33, one side of each cooling plate 33 is rotatably connected to the lower side of the driving mold 2, the outer side of the cooling plate 33 is provided with a plurality of cooling springs 34, the far ends of the cooling springs 34 are fixed on the inner side of the driving die 2, the lower side of the driving die 2 is provided with an air inlet 35, the outer side of the air inlet 35 is provided with an air inlet pipe 36, the air inlet pipe 36 is connected with the output end of the existing blower, the outer side of the cooling plate 33 is connected with a lower deflection rod 37 in a sliding manner, the far end of the lower deflection rod 37 is rotatably connected to the lower end of the control rod 25, one side of the control block 23 is provided with an air outlet groove 38, the driving assembly 28 comprises two driving screw rods 39, the upper end of the driving die 2 is provided with a driving frame 40, the two ends of the driving screw rods 39 are respectively rotatably connected to the inner side of the driving frame 40 and the upper side of the driving die 2, the two sides of the control block 23 are respectively in threaded connection with the two driving screw rods 39, the outer side of the driving frame 40 is provided with two driving motors 41, and the output ends of the driving motors 41 are fixedly connected with the driving screw rods 39;
referring to fig. 5-6, the embodiments are: utilize drive assembly 28 in order to accomplish control block 23 and rise and descend, control block 23 rises in-process releases in proper order press plate 19 and accomplishes the sealed piece 12 to the sealed of shaping hole 4, control block 23 rises in-process simultaneously and takes out the inside air of initiative mould 2 and passive mould 1 cavity, control lever 25 is jacked up to make the closed plate 31 accomplish the sealed of top shaping hole 4 when reaching the top in control block 23, open cooling plate 33 simultaneously, the control air-blower blows the air current into the inside of initiative mould 2, and discharge from air-out groove 38, accomplish the cooling shaping to the material, control driving motor 41 drives drive lead screw 39 and rotates, can promote and push down control block 23.
An injection molding process of a large-scale injection mold with a complex core-pulling hot runner thin wall of a shell comprises the following specific steps:
s1, installing and using the active mold 2 and the passive mold 1 by using the existing machine tool, moving the active mold 2 to the outer side of the passive mold 1, and injecting the molten material into the active mold 2 and the passive mold 1 through the feeding hole 3;
s2, in the process of material injection, the control motor 41 is controlled to drive the control block 23 to ascend and draw out the interior of the active mold 2, namely air in the interior of the active mold 2 and the interior of the passive mold 1 can be drawn out through the molding holes 4, the molten materials are assisted to be filled into the interior of the active mold 2 and the interior of the passive mold 1, and the molding holes 4 are sequentially closed in the process of ascending of the control block 23;
s3, when the material is filled, the control block 23 rises to the upper end of the active mold 2, the sealing assembly 29 can be controlled to seal the upper end forming hole 4, the cooling plate 33 is opened, the air outlet groove 38 reaches the opening, air flow is blown into the interior of the active mold 2 by the air blower and is discharged through the air outlet groove 38, and the material can be cooled and rapidly formed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a large-scale injection mold of hot runner thin wall of loosing core that shell is complicated, includes passive mould (1) and initiative mould (2), passive mould (1) is opened there are pan feeding hole (3), its characterized in that: the active die (2) is provided with a plurality of uniformly distributed forming holes (4), the inner side of the active die (2) is provided with a plurality of uniformly distributed sealing mechanisms (5), one side of the active die (2) is provided with a pressing mechanism (6), and one side of the active die (2) is provided with a control mechanism (7);
sealing mechanism (5) are including spacing cylinder (8), spacing groove (9) have been opened to spacing cylinder (8) both sides, spacing cylinder (8) inside sliding connection has stopper (10), stopper (10) both ends are equipped with extension cylinder (11) respectively, extension cylinder (11) sliding connection is inside spacing groove (9), extension cylinder (11) distal end is equipped with sealed piece (12), spacing cylinder (8) outside is equipped with seal assembly (13).
2. The large-scale injection mold with the hot runner and the thin wall and the complex core-pulling shell according to claim 1, wherein the sealing assembly (13) comprises a lifting ring (14) connected to the outer side of the limiting cylinder (8) in a sliding manner, lifting grooves (15) are formed in two sides of the limiting cylinder (8), rotating blocks (16) connected to the inner portions of the lifting grooves (15) in a sliding manner are arranged at two ends of the lifting ring (14), rotating grooves (17) are formed in two sides of the limiting block (10), and rotating wheels (18) rolling in the rotating grooves (17) are rotatably connected to the inner sides of the rotating blocks (16).
3. The large injection mold with the hot runner and the thin wall and the complex core pulling casing according to claim 2, characterized in that the pressing mechanism (6) comprises a pressing plate (19), two ends of the pressing plate (19) are respectively connected and fixed with the lifting rings (14) of two adjacent sealing assemblies (13), a plurality of pressing telescopic rods (20) are arranged on the outer side of the pressing plate (19), the distal ends of the pressing telescopic rods (20) are fixed on the inner side of the driving mold (2), a pressing spring (21) is arranged on the outer side of the pressing telescopic rods (20), two ends of the pressing spring (21) are respectively connected and fixed with two ends of the pressing telescopic rods (20), and a plurality of pressing cylinders (22) are rotatably connected to the middle of the pressing plate (19).
4. The large-scale injection mold with the complex-casing core-pulling hot runner thin wall according to claim 1, characterized in that the control mechanism (7) comprises a control block (23) connected to one side of the driving mold (2) in a sliding manner, an opening attached to the control block (23) is formed in the upper side of the driving mold (2), a control oblique block (24) is arranged at the lower end of the control block (23), two control rods (25) are connected to the inner side of the driving mold (2) in a sliding manner, a passive block (26) is arranged on the outer side of each control rod (25), driving blocks (27) are arranged on two sides of the control block (23), a driving assembly (28) is arranged at the upper end of the driving mold (2), a sealing assembly (29) is arranged on the upper side of the driving mold (2), and a cooling assembly (30) is arranged on the lower side of the driving mold (2).
5. The large-scale injection mold with the complex-core-pulling hot runner and the thin wall for the shells as claimed in claim 4, wherein the closing assembly (29) comprises a closing plate (31), one side of the closing plate (31) is rotatably connected to the upper side of the active mold (2), a plurality of closing plates (31) are arranged on one side of the closing plate (31), the far end of the closing plate (31) is rotatably connected with an upper deflecting rod (32), and the far end of the upper deflecting rod (32) is rotatably connected to the upper end of the control rod (25).
6. The large-scale injection mold with the complex-core-pulling hot runner thin wall and the shell as claimed in claim 4, wherein the cooling assembly (30) comprises a cooling plate (33), one side of the cooling plate (33) is rotatably connected to the lower side of the active mold (2), a plurality of cooling springs (34) are arranged on the outer side of the cooling plate (33), the far ends of the cooling springs (34) are fixed on the inner side of the active mold (2), an air inlet (35) is formed in the lower side of the active mold (2), an air inlet pipe (36) is arranged on the outer side of the air inlet (35), the air inlet pipe (36) is connected with the output end of an existing air blower, a lower deflection rod (37) is slidably connected to the outer side of the cooling plate (33), the far end of the lower deflection rod (37) is rotatably connected to the lower end of the control rod (25), and an air outlet groove (38) is formed in one side of the control block (23).
7. The large-scale injection mold with the complex-core-pulling hot runner thin wall and the shell as claimed in claim 4, wherein the driving assembly (28) comprises two driving screws (39), a driving frame (40) is arranged at the upper end of the driving mold (2), two ends of each driving screw (39) are respectively and rotatably connected to the inner side of the driving frame (40) and the upper side of the driving mold (2), two sides of the control block (23) are respectively in threaded connection with the two driving screws (39), two driving motors (41) are installed on the outer side of the driving frame (40), and output ends of the driving motors (41) are fixedly connected with the driving screws (39).
8. The large thin-wall injection mold with the hot runner and the complicated core-pulling shell as claimed in claim 4, is characterized in that the size of the active block (27) is larger than that of the passive block (26).
9. The large-scale injection mold with the complex-core-pulling hot runner thin wall and the complicated-shell core-pulling hot runner thin wall as claimed in claim 1, wherein the contact surface of the forming hole (4) and the sealing block (12) is a frosted surface.
10. The injection molding process of the large injection mold with the complex core-pulling hot runner thin wall of the shell is characterized by comprising the following specific steps of:
s1, installing and using the active die (2) and the passive die (1) by using the existing machine tool, moving the active die (2) to the outer side of the passive die (1), and injecting the molten material into the active die (2) and the passive die (1) through the feeding hole (3);
s2, in the material injection process, the control motor (41) is controlled to drive the control block (23) to ascend and draw out the interior of the active mold (2), air in the interior of the active mold (2) and the interior of the passive mold (1) can be drawn out through the forming holes (4), the molten materials are filled into the interior of the active mold (2) and the interior of the passive mold (1) in an auxiliary mode, and the forming holes (4) are sequentially closed in the ascending process of the control block (23);
s3, when the material is filled, the control block (23) rises to the upper end of the active mold (2), namely the sealing assembly (29) can be controlled to seal the upper end forming hole (4), the cooling plate (33) is opened at the same time, the air outlet groove (38) reaches the opening, air flow is blown into the interior of the active mold (2) by the air blower and is discharged through the air outlet groove (38), and the material can be cooled and rapidly formed in an auxiliary mode.
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| CN202111317350.7A CN114083765B (en) | 2021-11-09 | 2021-11-09 | Large thin-wall injection mold with complex core-pulling hot runner of shell and injection molding process of large thin-wall injection mold |
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| CN114083765B (en) | 2023-11-17 |
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