CN210552850U - Micro single-head heating pipe structure of hot runner - Google Patents
Micro single-head heating pipe structure of hot runner Download PDFInfo
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- CN210552850U CN210552850U CN201920552509.5U CN201920552509U CN210552850U CN 210552850 U CN210552850 U CN 210552850U CN 201920552509 U CN201920552509 U CN 201920552509U CN 210552850 U CN210552850 U CN 210552850U
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- resistance wire
- magnesium oxide
- rod
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- steel shell
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Abstract
The utility model belongs to the technical field of electric heating element, especially, relate to a miniature single-end heating tube structure of hot runner. Comprises a resistance wire; the resistance wire penetrates through the through holes to form a U-shaped loop; two ends of the resistance wire are led out through lead rods, the lead rods are fixed through flanges and connected with the lead wires, and a tubular stainless steel shell is sleeved outside the magnesium oxide rod. The utility model discloses the manufacturing process need not add the magnesia powder, has simple structure, makes conveniently, the inside density homogeneity of electrothermal tube is good, generates heat evenly, electrothermal tube length uniformity is good, electrothermal tube compliance advantage such as good.
Description
Technical Field
The utility model belongs to the technical field of electric heating element, especially, relate to a miniature single-end heating tube structure of hot runner.
Background
At present, hot runner electric heating element kind is many in the market, with the utility model discloses a relevant product ubiquitous following shortcoming:
time consumption: the magnesium oxide powder is required to be added in the manufacturing process, the time spent in the magnesium oxide powder adding process is long due to the fact that the product is thin and long, and the magnesium oxide powder can be added in some extremely long products even after several hours, so that the time is wasted.
Pollution: the long-time magnesium oxide powder that adds needs vibrations in the powder process moreover, leads to partial magnesium oxide powder to volatilize to the air in the form of dust, causes workshop operational environment dust too much, causes the pollution to the environment, causes the injury to the human body.
Uneven heating of electric heat: because the inner space of the product is very small and long, the magnesia powder is difficult to uniformly fill each gap, and the thick and thin magnesia powder particles cannot be uniformly distributed after long-time powder adding, so that the heating of the electric heating tube is not uniform.
The length of the electric heating tube is uneven: the non-uniformity of the magnesia powder causes the length of the electric heating tube units after the tube is contracted to be inconsistent, and the length of the electric heating tube units is different.
Poor bending performance of the electric heating tube: the local density is too high due to the non-uniform internal magnesia powder, and the local part is easy to break when the magnesium alloy is bent.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome not enough among the prior art, provide a miniature single-end heating tube structure of hot runner.
In order to solve the technical problem, the utility model discloses a solution is:
the structure comprises a resistance wire; the resistance wire penetrates through the through holes to form a U-shaped loop; two ends of the resistance wire are led out through lead rods, the lead rods are fixed through flanges and connected with the lead wires, and a tubular stainless steel shell is sleeved outside the magnesium oxide rod.
As an improvement, an insulating sheet and a bottom cover are arranged at the end, far away from the guide rod, in the stainless steel shell.
As an improvement, the rear end of the leading-out rod is provided with a first plug.
As an improvement, a sealing material is filled between the flange and the leading rod, so that the function of moisture prevention is achieved.
As a modification, the flange is provided at its end with a second stopper for preventing the sealing material from overflowing.
A method for manufacturing the heating tube structure comprises the following steps:
(1) connecting two leading rods to two ends of the resistance wire respectively, and penetrating the connected leading rods and the resistance wire 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 lead rod so as not to be displaced relative to the magnesium oxide rod;
(3) the penetrated magnesium oxide rod, the resistance wire, the leading rod and the first plug are arranged in 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; an insulating sheet and a stainless steel pipe bottom cover are arranged at the bottom; welding the stainless steel bottom cover and the stainless steel shell together in a welding mode;
(5) and (3) performing pipe shrinkage on the pipe shrinking machine, crushing the magnesium oxide rod in a pipe shrinkage mode, filling the crushed magnesium oxide powder into the hole of the magnesium oxide rod, and uniformly distributing the magnesium oxide powder around the resistance wire.
Compared with the prior art, the utility model 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 consistency of length of the electric heating tube, good flexibility of the electric heating tube and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a diagram of the product of the present invention.
FIG. 3 is a cross-sectional view of a magnesium oxide rod according to the present invention;
reference numerals: 1-bottom cover, 2-insulating sheet, 3-stainless steel shell and 4-magnesium oxide rod; 5-resistance wire, 6-leading rod, 7-first plug, 8-flange; 9 a second plug; 10-wire.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1-2, a hot runner micro single-head heating tube structure comprises a resistance wire 5; the magnesium oxide wire is characterized by also comprising a magnesium oxide rod 4, wherein two through holes which are parallel to each other are formed in the middle of the magnesium oxide rod 4 along the radial direction, and the resistance wire 5 passes through the through holes to form a U-shaped loop; two ends of the resistance wire 5 are led out through a leading rod 6, the leading rod 6 is fixed through a flange and is connected with a lead, and a tubular stainless steel shell 3 is sleeved outside the magnesium oxide rod 4. An insulating sheet 2 and a bottom cover 1 are arranged at the end, far away from the leading bar 6, in the stainless steel shell 3. The rear end of the leading-out rod is provided with a first plug 7.
Sealing materials are filled between the flange and the leading rod 6, and the function of moisture prevention is achieved. The end of the flange is provided with a second plug for preventing the sealing material from overflowing.
A method for manufacturing the heating tube structure comprises the following steps:
(1) two leading rods 6 are respectively connected to two ends of a resistance wire 5, and the connected leading rods 6 and the resistance wire 5 penetrate through two holes of a magnesium oxide rod 4 to form a U-shaped loop;
(2) a first stopper 7 which is tightly matched is arranged at the tail end of the magnesium oxide rod 4 and is used for fixing the penetrated resistance wire 5 and the lead rod 6 so as not to be displaced relative to the magnesium oxide rod 4;
(3) the penetrated magnesium oxide rod 4, the resistance wire 5, the leading rod 6 and the first plug 7 are arranged in the stainless steel shell 3;
(4) a 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 pipe 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 pipe shrinkage on the pipe shrinking machine, crushing the magnesium oxide rod 4 in a pipe shrinkage mode, filling the crushed magnesium oxide powder into the hole of the magnesium oxide rod 4, and uniformly distributing the magnesium oxide powder around the resistance wire 5.
Two holes in the middle of the magnesium oxide rod 4 are symmetrical round through holes; the cross section of the magnesium oxide rod 4 is oval, and the resistance wire 5 connects a plurality of magnesium oxide rods 4 in series through two holes of the magnesium oxide rods 4, so that the resistance wire 5 is good in neutrality and symmetry. The leading rod 6 and the lead 10 are directly welded; the plug 7 and the guide rod 6 are in interference fit, and the purpose is that the plug cannot move freely after being installed; when the penetrated magnesium oxide rod 4, the resistance wire 5, the leading 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 is to be noted that the above-mentioned embodiments are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (5)
1. A hot runner micro single-head heating pipe structure comprises a resistance wire; the resistance wire is characterized by also comprising a magnesium oxide rod, wherein two through holes which are parallel to each other are formed in the middle of the magnesium oxide rod along the radial direction, and the resistance wire penetrates through the through holes to form a U-shaped loop; the two ends of the resistance wire are led out through lead rods, the lead rods are fixed through flanges and connected with the lead wires, and a tubular stainless steel shell is sleeved outside the magnesium oxide rod.
2. The structure of claim 1, wherein the stainless steel shell is provided with an insulating sheet and a bottom cover at the end far away from the guide rod.
3. The structure of claim 1, wherein the rear end of the guide rod is provided with a first plug.
4. The structure of claim 1, wherein a sealing material is filled between the flange and the guide rod to play a role of moisture-proof.
5. A structure according to claim 1 or 4, wherein the flange is terminated with a second plug for preventing the escape of the sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920552509.5U CN210552850U (en) | 2019-04-23 | 2019-04-23 | Micro single-head heating pipe structure of hot runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920552509.5U CN210552850U (en) | 2019-04-23 | 2019-04-23 | Micro single-head heating pipe structure of hot runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210552850U true CN210552850U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920552509.5U Active CN210552850U (en) | 2019-04-23 | 2019-04-23 | Micro single-head heating pipe structure of hot runner |
Country Status (1)
| Country | Link |
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| CN (1) | CN210552850U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039737A (en) * | 2019-04-23 | 2019-07-23 | 杭州佐帕斯工业有限公司 | A kind of miniature single head heating-pipe structure of hot flow path and its manufacturing method |
-
2019
- 2019-04-23 CN CN201920552509.5U patent/CN210552850U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039737A (en) * | 2019-04-23 | 2019-07-23 | 杭州佐帕斯工业有限公司 | A kind of miniature single head heating-pipe structure of hot flow path and its manufacturing method |
| CN110039737B (en) * | 2019-04-23 | 2024-04-09 | 杭州佐帕斯工业有限公司 | Hot runner miniature single-end heating pipe structure and manufacturing method thereof |
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