CN110039737B - Hot runner miniature single-end heating pipe structure and manufacturing method thereof - Google Patents
Hot runner miniature single-end heating pipe structure and manufacturing method thereof Download PDFInfo
- Publication number
- CN110039737B CN110039737B CN201910326002.2A CN201910326002A CN110039737B CN 110039737 B CN110039737 B CN 110039737B CN 201910326002 A CN201910326002 A CN 201910326002A CN 110039737 B CN110039737 B CN 110039737B
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- CN
- China
- Prior art keywords
- magnesium oxide
- rod
- stainless steel
- resistance wire
- steel shell
- 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.)
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Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 65
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 34
- 239000010935 stainless steel Substances 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 49
- 238000003466 welding Methods 0.000 claims description 8
- 239000003566 sealing material Substances 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000013067 intermediate product Substances 0.000 claims 3
- 238000003672 processing method Methods 0.000 claims 2
- 239000000047 product Substances 0.000 claims 1
- 238000005485 electric heating Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Resistance Heating (AREA)
Abstract
The invention belongs to the technical field of electric heating elements, and particularly relates to a hot runner miniature single-head heating pipe structure and a manufacturing method thereof. A hot runner miniature single-end heating pipe structure comprises a resistance wire; the resistor wire penetrates through the through holes to form a U-shaped loop; the two ends of the resistance wire are led out through a leading rod, the leading rod is fixed through a flange and is connected with a lead, and a tubular stainless steel shell is sleeved outside the magnesia rod. The invention also provides a method for manufacturing the heating pipe structure. The invention does not need magnesia powder in the manufacturing process, and has the advantages of simple structure, convenient manufacture, good uniformity of density inside the electric heating tube, uniform heating, good uniformity of length of the electric heating tube, good flexibility of the electric heating tube, and the like.
Description
Technical Field
The invention belongs to the technical field of electric heating elements, in particular to a hot runner miniature single-head heating pipe structure and a manufacturing method thereof.
Background
At present, the hot runner electric heating elements in the market are various, and one product related to the invention has the following defects:
time consuming: the magnesium oxide powder is required to be added in the manufacturing process, because the product is very thin and long, the magnesium oxide powder adding process takes a long time, and some particularly long products can be added with the magnesium oxide powder even in a few hours, so that the time is very wasted.
Pollution: the magnesium oxide powder is added for a long time, vibration is needed in the powder adding process, so that part of magnesium oxide powder volatilizes into the air in a dust form, excessive dust in a workshop working environment is caused, the environment is polluted, and the human body is injured.
Uneven heating by electric heat: because the internal space of the product is very small and very long, the magnesia powder is difficult to uniformly fill into each gap, and the coarse and fine particles of the magnesia powder cannot be well uniformly distributed after the magnesia powder is added for a long time, so that the heating of the electric heating tube is uneven.
The length of the electric heating tube is uneven: the uneven magnesium oxide powder causes inconsistent lengths among the electric heating pipe units after the pipe is contracted, and the lengths are long or short.
The bending performance of the electric heating tube is not good: the uneven internal magnesia powder causes overlarge local density, and local fracture is easy to occur when the magnesia powder is bent.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and providing a hot runner miniature single-head heating pipe structure and a manufacturing method thereof.
In order to solve the technical problems, the invention adopts the following solution:
providing a hot runner miniature single-head heating pipe structure, which comprises a resistance wire; the resistor wire penetrates through the through holes to form a U-shaped loop; the two ends of the resistance wire are led out through a leading rod, the leading rod is fixed through a flange and is connected with a lead, and a tubular stainless steel shell is sleeved outside the magnesia rod.
As an improvement, an insulating sheet and a bottom cover are arranged in the stainless steel shell far away from the end of the guide rod.
As an improvement, the rear end of the extraction rod is provided with a first plug.
As an improvement, sealing materials are filled between the flange and the guide rod, so that the moisture-proof effect is achieved.
As an improvement, the flange end is provided with a second plug for preventing the sealing material from overflowing.
The invention also provides a method for manufacturing the heating pipe structure, which comprises the following steps:
(1) Two guide rods are respectively connected to two ends of the resistance wire, and the connected guide rods and the resistance wire penetrate into two holes of the magnesium oxide rod to form a U-shaped loop;
(2) A first plug which is tightly matched is arranged at the tail end of the magnesium oxide rod and is used for fixing the penetrated resistance wire and the guide rod so as to prevent the resistance wire and the guide rod from relative displacement with the magnesium oxide rod;
(3) Putting the magnesium oxide rod, the resistance wire, the guide rod and the first plug into a stainless steel shell;
(4) The pipe orifice at one end of the stainless steel shell with the guide rod is tightly pressed, so that the plug is fixed in the stainless steel shell; the bottom is provided with an insulating sheet and a stainless steel tube bottom cover; welding the stainless steel bottom cover and the stainless steel shell together in a welding mode;
(5) And (3) performing shrinkage on a shrinkage tube machine, crushing the magnesium oxide rod in a shrinkage tube mode, filling the crushed magnesium oxide powder into holes of the magnesium oxide rod, and uniformly distributing the magnesium oxide powder around the resistance wire.
Compared with the prior art, the invention has the technical effects that:
the manufacturing process does not need to add magnesia powder, and has the advantages of simple structure, convenient manufacture, good uniformity of density inside the electric heating tube, uniform heating, good uniformity of length of the electric heating tube, good flexibility of the electric heating tube and the like.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a finished product diagram of the present invention.
FIG. 3 is a cross-sectional view of a magnesium oxide rod according to the present invention;
reference numerals: 1-a bottom cover, 2-an insulating sheet, 3-a stainless steel shell and 4-a magnesium oxide rod; 5-resistance wires, 6-guide rods, 7-first plugs and 8-flanges; 9 a second plug; 10-conducting wire.
Detailed Description
The following describes in detail the embodiments of the present invention with reference to the drawings.
As shown in fig. 1-2, a hot runner miniature single-head heating tube structure comprises a resistance wire 5; the electric resistance wire is characterized by further comprising a magnesium oxide rod 4, wherein two mutually parallel through holes are formed in the middle of the magnesium oxide rod 4 along the radial direction, and the electric resistance wire 5 penetrates through the through holes to form a U-shaped loop; the two ends of the resistance wire 5 are led out through the leading rod 6, the leading rod 6 is fixed through a flange and connected with a lead, and the magnesia rod 4 is sleeved with a tubular stainless steel shell 3. An insulating sheet 2 and a bottom cover 1 are arranged in the stainless steel shell 3 at the end far away from the guide rod 6. The rear end of the extraction rod is provided with a first plug 7.
Sealing materials are filled between the flange and the guide rod 6, so that the moisture-proof effect is achieved. The end of the flange is provided with a second plug for preventing the sealing material from overflowing.
The invention also provides a method for manufacturing the heating pipe structure, which comprises the following steps:
(1) Two guide rods 6 are respectively connected to two ends of the resistance wire 5, and the connected guide rods 6 and the resistance wire 5 penetrate into two holes of the magnesium oxide rod 4 to form a U-shaped loop;
(2) A first plug 7 tightly matched with the end of the magnesium oxide rod 4 is arranged at the end of the magnesium oxide rod to fix the threaded resistance wire 5 and the guide rod 6 from relative displacement with the magnesium oxide rod 4;
(3) Putting the magnesium oxide rod 4, the resistance wire 5, the guide rod 6 and the first plug 7 into the stainless steel shell 3;
(4) The pipe orifice at one end of the stainless steel shell 3 with the guide rod 6 is tightly pressed, so that the plug is fixed in the stainless steel shell 3; the bottom is provided with an insulating sheet 2 and a stainless steel tube bottom cover 1; welding the stainless steel bottom cover 1 and the stainless steel shell 3 together in a welding mode;
(5) And (3) performing shrinkage on a shrinkage tube machine, crushing the magnesium oxide rod 4 in a shrinkage tube mode, filling the crushed magnesium oxide powder into holes of the magnesium oxide rod 4, and uniformly distributing the magnesium oxide powder around the resistance wire 5.
The two middle holes of the magnesium oxide rod 4 are symmetrically round through holes; the cross section of the magnesium oxide rod 4 is elliptical, and the resistance wire 5 connects a plurality of magnesium oxide rods 4 in series through two holes of the magnesium oxide rod 4, so that the resistance wire 5 is well centered and symmetrical. The guide bar 6 and the lead 10 are directly welded; the plug 7 is in interference fit with the guide rod 6, so that the plug cannot move randomly after being installed; when the worn magnesium oxide rod 4, the resistance wire 5, the guide rod 6 and the plug 7 are arranged in the stainless steel shell 3, one end of the stainless steel 3 is sleeved on a small boss for ensuring the length consistency of the cold end at the bottom.
Finally, it should be noted that the above list is only specific embodiments of the present invention. Obviously, the invention is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present invention.
Claims (3)
1. The processing method of the hot runner miniature single-end heating pipe structure is characterized by comprising the following steps of:
(1) Two mutually parallel through holes are formed in the middle of the magnesium oxide rod along the radial direction, the two guide rods are respectively connected to the two ends of the resistance wire, and then the two guide rods penetrate into the two holes of the magnesium oxide rod to form a U-shaped loop;
(2) A first plug closely matched with the end of the magnesium oxide rod is arranged in the magnesium oxide rod, the device is used for fixing the worn resistance wire and the guide rod so as not to relatively shift with the magnesium oxide rod;
(3) Loading the worn magnesium oxide rod, the resistance wire, the guide rod and the first plug into a tubular stainless steel shell;
(4) Compacting the pipe orifice of the stainless steel shell with one end of the guide rod to fix the first plug in the stainless steel shell; an insulating sheet and a stainless steel pipe bottom cover are arranged at the bottom of the stainless steel shell, and the stainless steel bottom cover and the stainless steel shell are welded together in a welding mode;
middle after welding the product has the following shape: the outside of the magnesium oxide rod is sleeved with a tubular stainless steel shell, and the resistance wire penetrates through two mutually parallel through holes formed in the middle of the magnesium oxide rod along the radial direction to form a U-shaped loop; the two ends of the resistance wire are led out through a guide rod, and the guide rod is fixed through a first plug and connected with a lead;
(5) Performing pipe shrinkage operation on the intermediate product on a pipe shrinkage machine, and crushing the magnesium oxide rod in a pipe shrinkage mode; the crushed magnesia powder is filled into the holes of the original magnesia rod, so that the periphery of the resistance wire is uniformly distributed with the magnesia powder.
2. The processing method of the hot runner miniature single-end heating pipe structure is characterized by comprising the following steps of:
(1) Two mutually parallel through holes are formed in the middle of the magnesium oxide rod along the radial direction, the two guide rods are respectively connected to the two ends of the resistance wire, and then the two guide rods penetrate into the two holes of the magnesium oxide rod to form a U-shaped loop;
(2) A second plug which is tightly matched is arranged at the tail end of the magnesium oxide rod and is used for fixing the penetrated resistance wire and the guide rod so as to prevent the resistance wire and the guide rod from relative displacement with the magnesium oxide rod;
(3) Putting the magnesium oxide rod and the resistance wire into a tubular stainless steel shell, so that the second plug and the guide rod are fixed in the flange;
(4) An insulating sheet and a stainless steel pipe bottom cover are arranged at the bottom of the stainless steel shell, and the stainless steel bottom cover and the stainless steel shell are welded together in a welding mode;
the shape of the intermediate product after welding is finished is as follows: the outside of the magnesium oxide rod is sleeved with a tubular stainless steel shell, and the resistance wire penetrates through two mutually parallel through holes formed in the middle of the magnesium oxide rod along the radial direction to form a U-shaped loop; the two ends of the resistance wire are led out through a guide rod, and the guide rod is fixed in the flange through a second plug and is connected with the lead;
(5) Performing pipe shrinkage operation on the intermediate product on a pipe shrinkage machine, and crushing the magnesium oxide rod in a pipe shrinkage mode; the crushed magnesia powder is filled into the holes of the original magnesia rod, so that the periphery of the resistance wire is uniformly distributed with the magnesia powder.
3. The method of claim 2, wherein sealing material is filled between the flange and the guide bar to provide moisture protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910326002.2A CN110039737B (en) | 2019-04-23 | 2019-04-23 | Hot runner miniature single-end heating pipe structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910326002.2A CN110039737B (en) | 2019-04-23 | 2019-04-23 | Hot runner miniature single-end heating pipe structure and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110039737A CN110039737A (en) | 2019-07-23 |
| CN110039737B true CN110039737B (en) | 2024-04-09 |
Family
ID=67278503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910326002.2A Active CN110039737B (en) | 2019-04-23 | 2019-04-23 | Hot runner miniature single-end heating pipe structure and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110039737B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH246439A (en) * | 1944-05-10 | 1947-01-15 | Luescher Paul | Process for the production of electric heating rods. |
| FR2754128A1 (en) * | 1996-09-27 | 1998-04-03 | Vulcanic | Tubular heating element for electric radiator |
| KR100915997B1 (en) * | 2009-05-11 | 2009-09-10 | 김봉선 | Manufacturing method for the heat pipe |
| CN102528394A (en) * | 2011-12-27 | 2012-07-04 | 乐清市海狮电热电器制造有限公司 | Manufacturing method of electric heating push rod of electronic thermostat of engine |
| CN104284460A (en) * | 2013-07-05 | 2015-01-14 | 镇江市清安电器有限公司 | High-temperature drying-free U-shaped pipe and manufacturing method thereof |
| CN206865772U (en) * | 2017-06-10 | 2018-01-09 | 杭州佐帕斯工业有限公司 | The single-end electrothermal tube of three-phase electricity input |
| KR20180110768A (en) * | 2017-03-30 | 2018-10-11 | 주식회사 이노핫 | Heating set for hot water apparatus |
| JP2019050076A (en) * | 2017-09-07 | 2019-03-28 | カルソニックカンセイ株式会社 | Sheath heater and manufacturing method thereof |
| CN210552850U (en) * | 2019-04-23 | 2020-05-19 | 杭州佐帕斯工业有限公司 | Micro single-head heating pipe structure of hot runner |
-
2019
- 2019-04-23 CN CN201910326002.2A patent/CN110039737B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH246439A (en) * | 1944-05-10 | 1947-01-15 | Luescher Paul | Process for the production of electric heating rods. |
| FR2754128A1 (en) * | 1996-09-27 | 1998-04-03 | Vulcanic | Tubular heating element for electric radiator |
| KR100915997B1 (en) * | 2009-05-11 | 2009-09-10 | 김봉선 | Manufacturing method for the heat pipe |
| CN102528394A (en) * | 2011-12-27 | 2012-07-04 | 乐清市海狮电热电器制造有限公司 | Manufacturing method of electric heating push rod of electronic thermostat of engine |
| CN104284460A (en) * | 2013-07-05 | 2015-01-14 | 镇江市清安电器有限公司 | High-temperature drying-free U-shaped pipe and manufacturing method thereof |
| KR20180110768A (en) * | 2017-03-30 | 2018-10-11 | 주식회사 이노핫 | Heating set for hot water apparatus |
| CN206865772U (en) * | 2017-06-10 | 2018-01-09 | 杭州佐帕斯工业有限公司 | The single-end electrothermal tube of three-phase electricity input |
| JP2019050076A (en) * | 2017-09-07 | 2019-03-28 | カルソニックカンセイ株式会社 | Sheath heater and manufacturing method thereof |
| CN210552850U (en) * | 2019-04-23 | 2020-05-19 | 杭州佐帕斯工业有限公司 | Micro single-head heating pipe structure of hot runner |
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| Publication number | Publication date |
|---|---|
| CN110039737A (en) | 2019-07-23 |
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