CN116968282B - Injection mold with high-efficient cooling - Google Patents

Injection mold with high-efficient cooling Download PDF

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Publication number
CN116968282B
CN116968282B CN202310827073.7A CN202310827073A CN116968282B CN 116968282 B CN116968282 B CN 116968282B CN 202310827073 A CN202310827073 A CN 202310827073A CN 116968282 B CN116968282 B CN 116968282B
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China
Prior art keywords
cooling
seat
die
water
injection mold
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CN202310827073.7A
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CN116968282A (en
Inventor
施伟强
莫颖微
吴汉群
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Guangdong Hongtai Automotive Parts Co ltd
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Guangdong Hongtai Automotive Parts Co ltd
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Priority to CN202310827073.7A priority Critical patent/CN116968282B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/72Heating or cooling
    • B29C45/73Heating or cooling of the mould
    • B29C45/7312Construction of heating or cooling fluid flow channels

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention discloses an injection mold with efficient cooling, which comprises a cooling seat and a mold body positioned in the cooling seat, wherein a cooling cavity with an upward opening is formed in the cooling seat, a mounting frame is arranged at the upper end of the cooling cavity, and a lifting device for controlling the mounting frame to move up and down is arranged on the cooling seat; the die body comprises an upper die and a lower die, the upper end of the upper die is provided with a water collecting ring strip, and a protective ring cover is sleeved outside the joint of the upper die and the lower die; the cooling seat is inside to be equipped with the spacer ring seat of integral type connection, and spacer ring seat is inside to be provided with spiral curved tube, and the mould body is located spiral curved tube inside, and spiral curved tube upper end is connected with the shunt tubes, and shunt tubes both ends are respectively towards spacer ring seat inside and outside. The invention realizes the gradual cooling of the die body through three stages, avoids the occurrence of bubbles in the plastic molding process due to the instant contact of high temperature with low temperature while ensuring the speed reduction rate of the die body, and reduces the product yield.

Description

Injection mold with high-efficient cooling
Technical Field
The invention mainly relates to the technical field of injection molds, in particular to an injection mold with efficient cooling.
Background
The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and precise dimensions. Injection molding is a processing method used in mass production of parts with complex shapes, and specifically refers to injection molding of heated and melted plastic into a mold cavity by an injection molding machine under high pressure, and cooling and solidification are carried out to obtain a molded product. In the process of manufacturing the plastic product, the plastic is required to be heated to a molten state (about 280 ℃), then the plastic in the molten state is introduced into a mold, and the plastic product can be molded after being cooled (about 80 ℃).
At present, a common cooling method of the injection mold comprises passive cooling and active cooling, wherein the passive cooling is to directly cool the injection mold in air, and the active cooling is to increase the air flow rate or directly splash cold water on the surface of the injection mold. The passive cooling efficiency is low, and the cooling speed is low, so that the molding efficiency of the plastic part is affected; the injection mold is directly contacted with cold water through active cooling, and the high temperature is instantly contacted with low temperature, so that bubbles are easily generated in the plastic molding process, and the product yield is reduced.
Disclosure of Invention
The technical scheme of the invention aims at the technical problem that the prior art is too single, provides a solution which is obviously different from the prior art, and mainly provides the injection mold with high-efficiency cooling, so as to solve the technical problem that the injection mold cannot improve the cooling efficiency of the injection mold on the premise of ensuring the product quality in the prior art.
The technical scheme adopted for solving the technical problems is as follows:
The injection mold with the high-efficiency cooling function comprises a cooling seat and a mold body positioned in the cooling seat, wherein a cooling cavity with an upward opening is formed in the cooling seat, a mounting frame is arranged at the upper end of the cooling cavity, and a lifting device for controlling the mounting frame to move up and down is arranged on the cooling seat;
The die body comprises an upper die and a lower die, a water collecting ring strip is arranged at the upper end of the upper die, a protective ring cover is sleeved outside the joint of the upper die and the lower die, a water storage ring groove is formed in the protective ring cover, a communicating pipe is connected between the water storage ring groove and the water collecting ring strip, the upper end inside the protective ring cover is connected with the side wall of the upper die, sliding grooves are respectively formed in four sides of the lower end inside the protective ring cover, and piston strips slide inside the sliding grooves;
The cooling seat is inside to be equipped with the spacer ring seat that the integral type is connected, the spacer ring seat is inside to be provided with spiral curved pipe, just the mould body is located spiral curved pipe inside, spiral curved pipe upper end is connected with the shunt tubes, shunt tubes both ends are inside and outside towards the spacer ring seat respectively, the drainage plate is installed to water catch ring strip upper end one side, the drainage plate is relative with the one end export of shunt tubes.
Preferably, the lifting device comprises a plurality of electric push rods arranged at the upper end of the cooling seat, and a connecting rod frame is connected between the electric push rods and the mounting frame.
Preferably, two groups of fixing rods are connected between the upper die and the lower end of the mounting frame, the lower die is provided with a bottom plate, and four groups of electric telescopic rods are connected between four corners of the bottom plate and the mounting frame.
Preferably, when the water storage ring groove is filled with water, the four piston strips are respectively contacted with the connecting gaps between the upper die and the lower die, and one side of the protective ring cover is connected with a valve.
Preferably, the outer part of the protective ring cover is connected with an integrated guide ring cover, the cross section of the guide ring cover is hollow trapezoid, and one side of the piston strip, which is far away from the die body, is arc-shaped.
Preferably, the lower end of the cooling cavity is provided with a water inlet pipe and a water outlet pipe, one end of the water inlet pipe is connected with the spiral curved pipe, and one end of the water outlet pipe is connected to the bottom wall of the cooling cavity.
Preferably, a necking pipe is arranged at a port of one side of the shunt pipe facing the inside of the separation ring seat.
Compared with the prior art, the invention has the beneficial effects that:
(1) The cooling of the die disclosed by the invention is carried out in three stages: 1. the water inlet pipe is used for providing cooling water for the spiral curved pipe, the cooling water flows in the spiral curved pipe and slowly rises, and the cooling water cools the cooling cavity through the spiral curved pipe, so that the die body is cooled, the temperature in the cooling cavity is continuously reduced, and therefore, the temperature of cold air received by the die body is also continuously reduced, and a circulation gradual process is provided, so that the cooling of the die body in the first stage is realized; 2. when the spiral curved pipe is full of cooling water, the cooling water flows out from two ends of the shunt pipe, one end of the cooling water flows out of the separating ring seat, and the water level is increased continuously along with the increase of time, at the moment, the cooling water is not used for cooling the cooling cavity through the spiral curved pipe, but is used for directly cooling the cooling cavity, the cooling rate of the cooling cavity is increased while the cooling cavity is continuously cooled, the cooling cavity is rapidly cooled, and the cooling of the second stage of the die body is realized while the gradual circulation process is maintained; 3. finally, the cooling water overflows from the outside of the separating ring seat and flows into the separating ring seat, and the cooling water on the water collecting ring strips overflows to enable the cooling water in the separating ring seat to continuously rise until the cooling water is over the die body, so that the die body is directly contacted with the cooling water, and the cooling of the third stage is realized;
In summary, the invention realizes the gradual cooling of the die body through three stages, avoids the occurrence of bubbles in the plastic molding process due to the instant contact of high temperature with low temperature while ensuring the speed reduction rate of the die body, and reduces the product yield;
(2) When the spiral curved pipe is full of cooling water, the cooling water flows out from two ends of the split pipe, one end of the cooling water flows into the water collecting ring strip and the protective ring cover along with the drainage plate, the pressure born by the upper die is continuously increased along with the increase of the water quantity in the water collecting ring strip, gaps are avoided between the upper die and the lower die, the bonding degree between the upper die and the lower die is improved, the product qualification rate is ensured, the existence of the necking pipe can avoid overflow of the cooling water in the water collecting ring strip and the protective ring cover due to excessively high filling speed, and the cooling stage of the cooling water to the die body is changed;
(3) Cooling water flows out of the shunt tubes and flows into the water collecting ring strips, then enters into the water storage ring groove in the protective ring cover along with the communicating pipe, and water in the water storage ring groove pushes the piston strips to move through water pressure, so that the four piston strips are respectively contacted with connecting gaps between the upper die and the lower die, and the cooling water is prevented from entering into the upper die and the lower die, and the practicability is improved.
The invention will be explained in detail below with reference to the drawings and specific embodiments.
Drawings
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic side view of a partial structure of the present invention;
FIG. 3 is a schematic view of a spiral curved tube structure according to the present invention;
Fig. 4 is an enlarged view of fig. 2a in accordance with the present invention.
Description of the drawings: 1. a cooling seat; 11. a cooling cavity; 12. an electric push rod; 13. a connecting rod frame; 14. an upper die; 15. a lower die; 2. a mounting frame; 21. a fixed rod; 22. an electric telescopic rod; 3. a spacer ring seat; 31. a spiral curved tube; 32. a shunt; 33. a necking pipe; 34. a water inlet pipe; 35. a water outlet pipe; 4. a water collecting ring strip; 41. a communicating pipe; 42. a drainage plate; 5. a guard ring cover; 51. a water storage ring groove; 52. a piston rod; 53. a deflector ring cover; 54. and (3) a valve.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will be rendered by reference to the appended drawings, in which several embodiments of the invention are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this invention belongs, and the knowledge of terms used in the description of this invention herein for the purpose of describing particular embodiments is not intended to limit the invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides an injection mold with high-efficient refrigerated, includes cooling seat 1 and is located the inside mould body of cooling seat 1, cooling chamber 11 that the opening was upwards has been seted up to cooling seat 1 inside, cooling chamber 11 upper end is equipped with mounting bracket 2, be provided with the elevating gear who controls mounting bracket 2 reciprocates on the cooling seat 1, elevating gear is including installing a plurality of electric putter 12 in cooling seat 1 upper end, a plurality of be connected with connecting rod frame 13 between electric putter 12 and the mounting bracket 2. Through controlling electric putter 12 for connecting rod frame 13 drives mounting bracket 2 and reciprocates, thereby realizes taking out and placing of mould body from cooling chamber 11.
Two groups of fixing rods 21 are connected between the upper die 14 and the lower end of the mounting frame 2, the lower die 15 is provided with a bottom plate, and four groups of electric telescopic rods 22 are connected between four corners of the bottom plate and the mounting frame 2. The upper die 14 and the lower die 15 are conveniently separated by adjusting the electric telescopic rod 22.
Referring to fig. 1-3, a separating ring seat 3 integrally connected is disposed inside the cooling seat 1, a spiral curved tube 31 is disposed inside the separating ring seat 3, the mold body is disposed inside the spiral curved tube 31, a water inlet tube 34 is disposed at the lower end of the cooling cavity 11, one end of the water inlet tube 34 is connected with the spiral curved tube 31, and the water inlet tube 34 is connected with a water supply source through a water pump. When the mould cools down, at first provide cooling water for spiral curved tube 31 through inlet tube 34, cooling water flows in spiral curved tube 31 inside, slowly rise, cooling water gives off the cooling and can let the inside temperature of cooling chamber 11 constantly reduce, lie in the inside mould body of spiral curved tube 31 fully and the air conditioning contact, the inside temperature of cooling chamber 11 constantly reduces, consequently, the air conditioning temperature that the mould body received also constantly reduces, there is a gradual process of circulation, realize the cooling of mould body first stage, avoid high temperature contact low temperature in the twinkling of an eye, cause the bubble to appear in the plastics shaping process, reduce the product yield.
Referring to fig. 1-3, the upper end of the spiral curved tube 31 is connected with a shunt tube 32, two ends of the shunt tube 32 face the inside and the outside of the separating ring seat 3 respectively, the die body comprises an upper die 14 and a lower die 15, the upper end of the upper die 14 is provided with a water collecting ring strip 4, a joint of the upper die 14 and the lower die 15 is sleeved with a protecting ring cover 5, one side of the upper end of the water collecting ring strip 4 is provided with a drainage plate 42, the drainage plate 42 is opposite to one end outlet of the shunt tube 32, and the port of the shunt tube 32 facing one side of the inside of the separating ring seat 3 is provided with a necking tube 33. After the spiral curved pipe 31 is fully filled with cooling water, the cooling water flows out from two ends of the split pipe 32, one end of the cooling water flows into the water collecting ring strip 4 and the protective ring cover 5 along with the drainage plate 42, the pressure born by the upper die 14 is continuously increased along with the increase of the water quantity in the water collecting ring strip 4, gaps are avoided between the upper die 14 and the lower die 15, the bonding degree between the upper die 14 and the lower die 15 is improved, the product qualification rate is ensured, the existence of the necking pipe 33 can prevent the overflow of the cooling water in the water collecting ring strip 4 and the protective ring cover 5 due to the excessively high filling speed, and the cooling stage of the cooling water to the die body is changed.
The cooling water other end flows to the outside of the separating ring seat 3, and the water level is increased continuously along with the increase of time until the cooling water overflows from the outside of the separating ring seat 3, at this time, the cooling water is not cooled down to the inside of the cooling cavity 11 through the spiral curved pipe 31, but is directly cooled down to the cooling cavity 11, the cooling rate is increased when the cooling cavity 11 is continuously cooled down, the cooling cavity 11 is cooled down rapidly, and the cooling of the second stage of the die body is realized.
Referring to fig. 1-4, a water storage ring groove 51 is formed in the guard ring cover 5, a communicating pipe 41 is connected between the water storage ring groove 51 and the water collection ring strip 4, the upper end of the inner portion of the guard ring cover 5 is connected with the side wall of the upper die 14, sliding grooves are respectively formed in four sides of the lower end of the inner portion of the guard ring cover 5, piston strips 52 slide in the sliding grooves, and when the water storage ring groove 51 is filled with water, the four piston strips 52 are respectively contacted with the connecting gaps between the upper die 14 and the lower die 15. Cooling water flows out from the shunt tubes 32 and flows into the water collecting ring strip 4, then enters into the water storage ring groove 51 in the protective ring cover 5 along with the communicating pipe 41, and water in the water storage ring groove 51 pushes the piston strips 52 to move through water pressure, so that the four piston strips 52 are respectively contacted with connecting gaps between the upper die 14 and the lower die 15, the cooling water is prevented from entering into the upper die 14 and the lower die 15, and the practicability is improved.
Referring to fig. 1-4, a valve 54 is connected to one side of the guard ring cover 5, and the valve 54 is used for discharging cooling water in the guard ring cover 5; the outer part of the protective ring cover 5 is connected with an integrated guide ring cover 53, the section of the guide ring cover 53 is hollow trapezoid, the guide ring cover 53 is designed into a special shape, and after the upper die 14 and the lower die 15 are separated, cooling water can be left along with the inclined surface of the guide ring cover 53 so as to avoid flowing into the upper die 14 and the lower die 15; the side, far away from the die body, of the piston strip 52 is arc-shaped, and the arc-shaped design can be more convenient for cooling water to extrude the piston strip 52; the cooling chamber 11 lower extreme is equipped with outlet pipe 35, outlet pipe 35 one end is connected on cooling chamber 11 diapire, and outlet pipe 35 passes through the water pump and is connected with the water tank, after using, discharges cooling water in cooling chamber 11 through outlet pipe 35 to realize the circulation of cooling water and use.
The cooling seat 1 is provided with a control panel (not shown in the figure) which is convenient for controlling the electric elements inside the device, and a control panel control circuit can be realized by simple programming of a person skilled in the art, and belongs to common knowledge in the art, and the control panel control circuit is only used and not modified, so that the control mode and circuit connection are not described in detail.
The specific operation flow of the invention is as follows:
The staff carries on the injection molding to upper die 14 and lower die 15 at first, then drive the mounting bracket 2 to move up and down through the electric putter 12, put the die body into cooling cavity 11, then offer the cooling water for spiral curved tube 31 through the inlet tube 34 first, the cooling water flows in spiral curved tube 31, rise slowly, the cooling that the cooling water gives off will let the cooling cavity 11 internal temperature decrease continuously, the die body located in spiral curved tube 31 internal temperature fully contacts with cold air, the temperature of cooling cavity 11 internal temperature is continuously decreasing, therefore, the temperature of cold air that the die body receives is also continuously decreasing, there is a circulation gradual process, realize the cooling of the die body in the first stage, after the spiral curved tube 31 internal is fully stored with the cooling water, the cooling water will flow out from the shunt tube 32 both ends, one end of the cooling water flows to the separating ring seat 3 outside, and make the water level rise continuously with the increase of time, until the cooling water overflows from the outside of the separating ring seat 3, at this time, the cooling water does not cool the inside of the cooling cavity 11 through the spiral curved pipe 31, but directly cools the cooling cavity 11, the cooling cavity 11 is continuously cooled and simultaneously the cooling rate is increased, the cooling cavity 11 is rapidly cooled, the cooling of the second stage of the die body is realized, the other end of the cooling water flows into the inside of the water collecting ring strip 4 and the protecting ring cover 5 along with the drainage plate 42, the pressure born by the upper die 14 is also continuously increased along with the increase of the water quantity in the inside of the water collecting ring strip 4, gaps are avoided between the upper die 14 and the lower die 15, the bonding degree between the upper die 14 and the lower die 15 is improved, the qualification rate of products is ensured, meanwhile, the cooling water flows out from the shunt pipe 32, flows into the inside of the water collecting ring strip 4, then enters into the inside of the water storing ring groove 51 in the protecting ring cover 5 along with the communicating pipe 41, the water in the water storage ring groove 51 pushes the piston strips 52 to move through the water pressure, so that the four piston strips 52 are respectively contacted with the connecting gaps between the upper die 14 and the lower die 15, cooling water is prevented from entering the upper die 14 and the lower die 15, finally, the cooling water overflows from the outside of the separating ring seat 3 and flows into the separating ring seat 3, the cooling water on the water collection ring strip 4 overflows, the cooling water in the separating ring seat 3 continuously rises until the cooling water is over the die body, and the die body is directly contacted with the cooling water, so that the cooling of the third stage is realized.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the embodiments described above, but is intended to be within the scope of the invention, as long as such insubstantial modifications are made by the method concepts and technical solutions of the invention, or the concepts and technical solutions of the invention are applied directly to other occasions without any modifications.

Claims (7)

1. Injection mold with high-efficient cooling, including cooling seat (1) and be located cooling seat (1) inside mould body, its characterized in that: the cooling seat (1) is internally provided with a cooling cavity (11) with an upward opening, the upper end of the cooling cavity (11) is provided with a mounting frame (2), and the cooling seat (1) is provided with a lifting device for controlling the mounting frame (2) to move up and down;
The die body comprises an upper die (14) and a lower die (15), a water collecting ring strip (4) is arranged at the upper end of the upper die (14), a protective ring cover (5) is sleeved outside the joint of the upper die (14) and the lower die (15), a water storage ring groove (51) is formed in the protective ring cover (5), a communicating pipe (41) is connected between the water storage ring groove (51) and the water collecting ring strip (4), the upper end of the interior of the protective ring cover (5) is connected with the side wall of the upper die (14), sliding grooves are respectively formed in four sides of the lower end of the interior of the protective ring cover (5), and piston strips (52) are arranged in the sliding grooves in a sliding mode;
The cooling seat (1) is inside to be equipped with separating ring seat (3) that integral type was connected, separating ring seat (3) inside is provided with spiral curved tube (31), just the mould body is located spiral curved tube (31) inside, spiral curved tube (31) upper end is connected with shunt tubes (32), shunt tubes (32) both ends are inside and outside towards separating ring seat (3) respectively, drainage plate (42) are installed to water catch ring strip (4) upper end one side, drainage plate (42) are relative with the one end export of shunt tubes (32).
2. An injection mold with efficient cooling as defined in claim 1, wherein: the lifting device comprises a plurality of electric push rods (12) arranged at the upper end of the cooling seat (1), and a connecting rod frame (13) is connected between the electric push rods (12) and the mounting frame (2).
3. An injection mold with efficient cooling as defined in claim 1, wherein: two groups of fixing rods (21) are connected between the upper die (14) and the lower end of the mounting frame (2), the lower die (15) is provided with a bottom plate, and four groups of electric telescopic rods (22) are connected between four corners of the bottom plate and the mounting frame (2).
4. An injection mold with efficient cooling as defined in claim 1, wherein: when the water storage ring groove (51) is filled with water, the four piston bars (52) are respectively contacted with connecting gaps between the upper die (14) and the lower die (15), and one side of the protective ring cover (5) is connected with a valve (54).
5. An injection mold with efficient cooling as defined in claim 1, wherein: the outer part of the protective ring cover (5) is connected with an integrated guide ring cover (53), the cross section of the guide ring cover (53) is hollow trapezoid, and one side, far away from the die body, of the piston strip (52) is arc-shaped.
6. An injection mold with efficient cooling as defined in claim 1, wherein: the cooling cavity (11) lower extreme is equipped with inlet tube (34) and outlet pipe (35), inlet tube (34) one end and spiral curved tube (31) are connected, outlet pipe (35) one end is connected on cooling cavity (11) diapire.
7. An injection mold with efficient cooling as defined in claim 1, wherein: a necking pipe (33) is arranged at a port of the shunt pipe (32) facing to one side of the inside of the separation ring seat (3).
CN202310827073.7A 2023-07-07 2023-07-07 Injection mold with high-efficient cooling Active CN116968282B (en)

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CN202310827073.7A CN116968282B (en) 2023-07-07 2023-07-07 Injection mold with high-efficient cooling

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Application Number Priority Date Filing Date Title
CN202310827073.7A CN116968282B (en) 2023-07-07 2023-07-07 Injection mold with high-efficient cooling

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CN116968282B true CN116968282B (en) 2024-05-10

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN213108065U (en) * 2020-08-12 2021-05-04 青岛鑫拓永祥电子科技有限公司 Injection mold cooling device is used in auto-parts processing
CN214214656U (en) * 2020-10-27 2021-09-17 安徽宏业塑业有限公司 Cooling device for injection mold
WO2022000907A1 (en) * 2020-07-02 2022-01-06 昆山市新腾胜精密模具有限公司 Injection mold capable of quickly cooling
CN216635283U (en) * 2022-01-07 2022-05-31 深圳市万顺达塑胶模具有限公司 High-precision injection mold with cooling system
CN219006836U (en) * 2022-11-29 2023-05-12 苏州乔布注塑工业有限公司 Hot runner mold structure beneficial to cooling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022000907A1 (en) * 2020-07-02 2022-01-06 昆山市新腾胜精密模具有限公司 Injection mold capable of quickly cooling
CN213108065U (en) * 2020-08-12 2021-05-04 青岛鑫拓永祥电子科技有限公司 Injection mold cooling device is used in auto-parts processing
CN214214656U (en) * 2020-10-27 2021-09-17 安徽宏业塑业有限公司 Cooling device for injection mold
CN216635283U (en) * 2022-01-07 2022-05-31 深圳市万顺达塑胶模具有限公司 High-precision injection mold with cooling system
CN219006836U (en) * 2022-11-29 2023-05-12 苏州乔布注塑工业有限公司 Hot runner mold structure beneficial to cooling

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