CN112721060B - Mould hot nozzle heat insulation device and injection mould - Google Patents
Mould hot nozzle heat insulation device and injection mouldInfo
- Publication number
- CN112721060B CN112721060B CN202011641697.2A CN202011641697A CN112721060B CN 112721060 B CN112721060 B CN 112721060B CN 202011641697 A CN202011641697 A CN 202011641697A CN 112721060 B CN112721060 B CN 112721060B
- Authority
- CN
- China
- Prior art keywords
- heat insulation
- hot nozzle
- mold
- insulation sleeve
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
- B29C45/2737—Heating or cooling means therefor
-
- 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
- B29C45/2737—Heating or cooling means therefor
- B29C2045/2743—Electrical heating element constructions
-
- 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
- B29C45/2737—Heating or cooling means therefor
- B29C2045/2753—Heating means and cooling means, e.g. heating the runner nozzle and cooling the nozzle tip
-
- 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
- B29C2045/2766—Heat insulation between nozzle and mould
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a mold hot nozzle heat insulation device and an injection mold, comprising a heat insulation sleeve and a circulating cooling system, wherein the heat insulation sleeve is fixed in the mold and sleeved on the periphery of the hot nozzle, the circulating cooling system comprises a flow guide pipe and a cooling pipe, and the cooling pipe is arranged in the heat insulation sleeve and is communicated with an external cooling liquid circulating system through the flow guide pipe. The invention can reduce the heat conduction from the hot nozzle to the die, so as to reduce the phenomena of cracking and difficult demoulding of the die caused by thermal expansion, thereby improving the precision of the die.
Description
Technical Field
The invention relates to the technical field of molds, in particular to a mold hot nozzle heat insulation device and an injection mold.
Background
The hot runner system is generally composed of a hot nozzle, a flow dividing plate and the like, and the whole runner from the nozzle outlet of the injection molding machine to the gate is in a high-temperature state due to the fact that a heating rod and a heating ring are arranged near or in the center of the runner, so that the plastic in the runner is kept in a molten state, but the temperature of the hot nozzle is higher, so that heat is conducted to a template to cause thermal expansion of the template, the precision of the die is affected, the produced product cannot be used, and the quality and the qualification rate of the product are affected.
Because the hot nozzle directly determines the hot runner system selection and the mold manufacturing, in the prior art, a heat insulation sleeve is sleeved on the head of the hot nozzle in the common hot runner system, but the heat generated by the hot nozzle cannot be reduced to be transmitted to the mold plate by simply using the heat insulation sleeve, therefore, a mold hot nozzle heat insulation device and an injection mold capable of reducing the heat transmission of the hot nozzle to the mold plate are needed to solve the technical problems in the prior art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a thermal nozzle heat insulation device for a mold and an injection mold, which can reduce the heat conduction from a thermal nozzle to the mold so as to reduce the cracking and demolding difficulty of the mold caused by thermal expansion, thereby improving the precision of the mold.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
In a first aspect, the invention provides a thermal insulation device for a hot nozzle of a mold, which comprises a thermal insulation sleeve and a circulating cooling system, wherein the thermal insulation sleeve is fixed in the mold and sleeved on the periphery of the hot nozzle, the circulating cooling system comprises a flow guide pipe and a cooling pipe, and the cooling pipe is arranged in the thermal insulation sleeve and is communicated with an external cooling liquid circulating system through the flow guide pipe.
In some embodiments, the heat insulation sleeve further comprises a pressing plate fixedly connected with the die, wherein a convex ring is arranged on the heat insulation sleeve, and the pressing plate is pressed on the convex ring in a pressing mode to achieve the fixation of the heat insulation sleeve and the die.
In some embodiments, the platen is secured to the mold by screws.
In some embodiments, the bore of the cooling tube increases gradually in the hot nozzle injection flow direction.
In some embodiments, the cooling tube is provided with an inclined portion at its end.
In some embodiments, a sealing ring for preventing liquid leakage of the guide pipe is arranged at the joint of the heat insulation sleeve and the die.
On the other hand, the invention also provides an injection mold, which comprises the mold hot nozzle heat insulation device.
In some embodiments, the hot nozzle is a flow channel structure with a heating wire distributed inside.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention provides a die hot nozzle heat insulation device which comprises a heat insulation sleeve and a circulating cooling system, wherein the heat insulation sleeve is fixed in a die and sleeved on the periphery of a hot nozzle, the circulating cooling system comprises a flow guide pipe and a cooling pipe, and the cooling pipe is arranged in the heat insulation sleeve and is communicated with an external cooling liquid circulating system through the flow guide pipe. According to the invention, the cooling water is injected into the flow guide pipe and the cooling pipe, so that the cooling water can take away the heat on the hot nozzle, and the heat generated on the hot nozzle is prevented from being conducted to the die, thereby reducing the phenomena of cracking and difficult demoulding of the die caused by thermal expansion, and improving the precision of the die.
2. According to the mold hot nozzle heat insulation device provided by the invention, the caliber of the cooling pipe is gradually increased along the injection molding flow direction of the hot nozzle, and the inclined part is arranged at the tail end of the cooling pipe, so that the cooling pipe can form the resistance difference inside the heat insulation sleeve by utilizing the distance difference between the inclined part and the opening end of the cooling pipe, and the cold water can automatically circulate in the cooling pipe.
3. The injection mold comprises the mold hot nozzle heat insulation device, wherein the hot nozzle is of a runner structure with heating wires distributed inside. According to the injection mold provided by the invention, the heat on the hot nozzle can be taken away by arranging the heat insulation sleeve and the circulating cooling system outside the hot nozzle, so that the heat generated on the hot nozzle is prevented from being conducted to the mold, the phenomena of cracking and difficult demolding of the mold caused by thermal expansion can be reduced, and the service life of the mold is prolonged.
Drawings
FIG. 1 is a cross-sectional view of a thermal nozzle insulating device for a mold according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a thermal nozzle insulation device for a mold according to an embodiment of the present invention;
FIG. 3 is an enlarged view at A in FIG. 1;
FIG. 4 is a schematic structural view of a heat insulating sleeve and a circulating cooling system of a heat insulating device for a hot nozzle of a mold according to an embodiment of the present invention;
in the figure, 1, a mould, 11, a cylinder plate, 12, a splitter plate, 13, a master template, 14, a hot runner system, 2, a hot nozzle, 3, a heat insulation sleeve, 4, a circulating cooling system, 41, a flow guide pipe, 42, a cooling pipe, 5, a pressing plate, 6, a convex ring, 7, a screw, 8, a sealing ring and 9 are arranged.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Embodiment one:
The invention provides a heat insulation device comprising a die hot nozzle, which comprises a heat insulation sleeve 3 and a circulating cooling system 4, wherein the heat insulation sleeve 3 is fixed in a die 1, the die 1 comprises a cylinder plate 11, a flow distribution plate 12 and a female die plate 13 which are sequentially arranged from top to bottom, a hot runner system 14 is arranged on the flow distribution plate 12, and the hot runner system 14 is used for heating the hot nozzle 2. The height of the heat insulation sleeve 3 is lower than that of the hot nozzle 2 so as to increase the heat exchange area of cooling water and the hot nozzle 2, and meanwhile, the heat insulation sleeve 3 does not prevent the hot nozzle 2 from working normally, and the heat insulation sleeve 3 is sleeved on the periphery of the hot nozzle 2. The circulating cooling system 4 comprises a guide pipe 41 and a cooling pipe 42, the cooling pipe 42 is arranged in the heat insulation sleeve 3, and the cooling pipe 42 is communicated with an external cooling liquid circulating system through the guide pipe 41. The flow guiding pipe 41 comprises a water inlet flow guiding pipe and a water outlet flow guiding pipe, and the water inlet flow guiding pipe and the water outlet flow guiding pipe are respectively arranged at two sides of the hot nozzle 2.
When the hot nozzle 2 needs to be cooled, only cooling water is injected into the water inlet guide pipe, and accordingly, the cooling water flowing into the water inlet guide pipe flows to the water outlet guide pipe through the cooling pipe 42, so that heat generated by the hot nozzle 2 can be taken away. That is, after the cooling water is injected into the cooling pipe 42, the cooling water surrounds the hot nozzle 2 as a whole, and then the cooling water discharges the cooling water with heat into the external cooling liquid circulation system through the water outlet guide pipe, so that the cooling effect of the hot nozzle 2 is obvious, the heat generated on the hot nozzle 2 is prevented from being conducted to the die 1, the phenomena of cracking and difficult demoulding of the die 1 caused by thermal expansion can be reduced, and the precision of the die 1 is improved.
Preferably, the caliber of the cooling tube 42 gradually increases along the injection molding flow direction of the hot nozzle 2, that is, the upper caliber of the cooling tube 42 is smaller than the lower caliber of the cooling tube 42, in addition, an inclined part is arranged at the tail end of the cooling tube 42, the cooling tube 42 can form the resistance difference inside the heat insulation sleeve 3 by using the distance difference between the inclined part and the opening end of the cooling tube 42, so that the resistance of the upper part in the cooling tube 42 is larger than the resistance of the lower part of the cooling tube 42, and the cooling water can automatically circulate in the cooling tube 42 to take away the heat on the hot nozzle 2, thereby avoiding the heat generated on the hot nozzle 2 from being conducted to the die 1, reducing the phenomena of thermal expansion cracking and difficult demoulding of the die 1, and prolonging the service life of the die 1. However, it should be understood that the shape of the cooling tube 42 according to the present invention is not limited thereto, and for example, the size of the upper and lower apertures of the cooling tube 42 may be uniform, and the size of the upper aperture of the cooling tube 42 may be larger than the size of the lower aperture of the cooling tube 42, so long as the circulation of cooling water in the cooling tube 42 can be achieved, and heat generated on the hot nozzle 2 is removed.
In order to fix the heat insulation sleeve 3 on the mould 1 firmly, the heat insulation device of the hot nozzle 2 of the mould 1 further comprises a pressing plate 5 fixedly connected with the mould 1, a convex ring 6 is arranged on the heat insulation sleeve 3, the convex ring 6 can be arranged according to the size of the heat insulation sleeve 3, the pressing plate 5 is pressed on the convex ring 6, and the pressing plate 5 fixedly connects the convex ring 6 with the mould 1 through a screw 7 so as to realize the fixed connection of the heat insulation sleeve 3 and the mould 1. Of course, other means for fixedly attaching the sleeve 3 to the mold 1 are possible by those skilled in the art, such as, for example, adhesive bonding the sleeve 3 to the mold 1. In order to prevent the liquid leakage of the guiding pipe 41, a sealing ring 8 is further arranged at the joint of the heat insulation sleeve 3 and the mold 1, and the size and thickness of the sealing ring 8 can be set according to the size of the guiding pipe 41. The sealing ring 8 is a high temperature resistant sealing ring 8, and the lowest heat resistant temperature of the sealing ring 8 is 250 ℃.
Embodiment two:
The invention also provides an injection mold 1, referring to fig. 1 and 2, which comprises the mold hot nozzle heat insulation device according to the first embodiment. It should be noted that, the hot nozzle 2 is a runner structure with a heating wire arranged inside, specifically, the heating wire is fully arranged inside the hot nozzle 2, when the hot runner system 14 heats the hot nozzle 2, the hot nozzle 2 can quickly heat, the heated hot nozzle 2 can melt plastic particles, so that molten plastic liquid can flow into the female mold core through the bottom of the hot nozzle 2, and finally the product 9 is manufactured.
When the temperature of the hot nozzle 2 is too high, heat of the hot nozzle 2 is easily conducted to the die 1, so that the die 1 is thermally expanded, the die 1 is thermally expanded and cracked, and the prepared product 9 is also easily demoulded difficultly. Therefore, for the mold 1 requiring the hot runner system 14, the precision of the mold 1 is affected in order to reduce the heat conduction from the hot nozzle 2 to the mold 1.
According to the invention, the heat insulation sleeve 3 is sleeved on the periphery of the hot nozzle 2, the heat on the hot nozzle 2 can be taken away by arranging the heat insulation sleeve 3 and the circulating cooling system 4 outside the hot nozzle 2, meanwhile, the convex ring 6 of the heat insulation sleeve 3 is pressed by the pressing plate 5 fixedly connected with the female die plate 13, correspondingly, the pressing plate 5 of the heat insulation sleeve 3 is fixed on the flow distribution plate 12 by adopting the screw 7, namely, the pressing plate 5 fixedly connected with the female die plate 13 is fixedly connected with the convex ring 6 through the screw 7, so that the heat insulation sleeve 3 and the die 1 are fixedly connected. Through design can business turn over honeycomb duct 41 of water on the flow distribution plate 12, pour into the cooling tube 42 in the insulating sheath 3 with the cooling water, make the cooling water can circulate in the cooling tube 42, take away the heat on the hot mouth 2, avoid on the heat conduction to mould 1 that produces on the hot mouth 2 to can reduce mould 1 because of the phenomenon that thermal expansion leads to fracture and drawing of patterns difficulty, improve mould 1's life.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (6)
1. The heat insulation device for the hot nozzle of the die is characterized by comprising a heat insulation sleeve and a circulating cooling system, wherein the heat insulation sleeve is fixed in the die and sleeved on the periphery of the hot nozzle;
the caliber of the cooling pipe is gradually increased along the injection molding flow direction of the hot nozzle, and the tail end of the cooling pipe is provided with an inclined part;
the height of the heat insulation sleeve is lower than that of the hot nozzle.
2. The mold hot nozzle heat insulation device according to claim 1, further comprising a pressing plate fixedly connected with the mold, wherein a convex ring is arranged on the heat insulation sleeve, and the pressing plate is pressed against the convex ring to realize the fixation of the heat insulation sleeve and the mold.
3. The mold hot nozzle heat shield according to claim 2, wherein the pressure plate is fixedly connected to the mold by a screw.
4. The heat insulation device for the hot nozzle of the die set forth in claim 1, wherein a sealing ring for preventing the liquid leakage of the guide pipe is arranged at the joint of the heat insulation sleeve and the die set.
5. An injection mold comprising the mold hot nozzle insulating device according to any one of claims 1 to 4.
6. The injection mold of claim 5, wherein the hot nozzle is a runner structure with a heater wire disposed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011641697.2A CN112721060B (en) | 2020-12-31 | 2020-12-31 | Mould hot nozzle heat insulation device and injection mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011641697.2A CN112721060B (en) | 2020-12-31 | 2020-12-31 | Mould hot nozzle heat insulation device and injection mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112721060A CN112721060A (en) | 2021-04-30 |
| CN112721060B true CN112721060B (en) | 2025-07-29 |
Family
ID=75609331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011641697.2A Active CN112721060B (en) | 2020-12-31 | 2020-12-31 | Mould hot nozzle heat insulation device and injection mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112721060B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114434760A (en) * | 2022-02-23 | 2022-05-06 | 浙江正泰建筑电器有限公司 | Heat-insulating water jacket for high-temperature injection mold and injection mold |
| CN114589895B (en) * | 2022-05-10 | 2022-09-09 | 扬昕科技(苏州)有限公司 | Mold cooling device |
| CN117507265B (en) * | 2023-11-10 | 2025-10-21 | 好特斯(南通)精密科技有限公司 | A cooling jacket and hot runner system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211968276U (en) * | 2020-01-05 | 2020-11-20 | 苏州希尔林机械科技有限公司 | Injection nozzle with cooling sleeve for injection molding hot runner |
| CN214395223U (en) * | 2020-12-31 | 2021-10-15 | 昆山乙盛机械工业有限公司 | Hot mouth heat insulation device of mould and injection mould |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201437269U (en) * | 2009-09-01 | 2010-04-14 | 恒毅模具注塑(深圳)有限公司 | Injection mold with ultrashort-cycle molding |
| CN204749142U (en) * | 2015-05-26 | 2015-11-11 | 苏州乔布注塑工业有限公司 | Hot runner moulded die |
| CN206913639U (en) * | 2016-11-29 | 2018-01-23 | 东莞市广正模具塑胶有限公司 | A cooling system structure suitable for plastic mold hot mouth cover |
| CN212072794U (en) * | 2020-03-10 | 2020-12-04 | 平田精工(大连)有限公司 | A thermosetting inner wall mold hot runner device |
-
2020
- 2020-12-31 CN CN202011641697.2A patent/CN112721060B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211968276U (en) * | 2020-01-05 | 2020-11-20 | 苏州希尔林机械科技有限公司 | Injection nozzle with cooling sleeve for injection molding hot runner |
| CN214395223U (en) * | 2020-12-31 | 2021-10-15 | 昆山乙盛机械工业有限公司 | Hot mouth heat insulation device of mould and injection mould |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112721060A (en) | 2021-04-30 |
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