CN211917721U - 3D printer hot junction heat abstractor - Google Patents

Abstract

The utility model discloses a 3D printer hot junction heat abstractor, including consumptive material pipe, location aluminum plate, consumptive material transition ring, consumptive material choke, connecting bolt, hexagonal heat dissipation tower, heating piece, no threaded nozzle. The consumable throat pipe of the device uses the stainless steel inner wall to replace the traditional Teflon pipe, reduces the outer diameter of the throat pipe, reduces the heat conduction, and prevents the excessive heat of the heating block from being transferred to the hexagonal heat dissipation tower; the hexagonal heat dissipation tower is composed of nine heat dissipation fins, and the heat dissipation fin at the bottommost part is thicker, so that more heat can be absorbed, and the effect of preheating is achieved. The device has the advantages of high temperature resistance, good heat dissipation effect, small pipe wall abrasion, long service life and the like.

Description

3D printer hot junction heat abstractor

Technical Field

The utility model relates to a 3D printing device technical field especially relates to a 3D printer high temperature hot junction heat abstractor.

Background

With the development of the 3D printing material increasing technology, the printing stability of the FDM 3D printer is a consensus of the industry, and the FDM 3D printer is developed in the direction of saving energy, being convenient to use, saving space, safe, efficient, multifunctional and the like. The hot end is an important member of continuous and stable work of the 3D printer without exception.

A common 3D printer hot end external member adopts a Teflon tube (polytetrafluoroethylene) or a machined part as an internal structure of a throat tube. The material not only can forcedly insulate heat, but also has a lubricating function, so that the material is deeply favored by 3D printing manufacturers. But because the mechanical property of teflon pipe (polytetrafluoroethylene) is high inadequately, self-lubricating function can't keep out sharp object cutting itself, it is well known, the FDM consumptive material can produce "sawtooth" when the extruder gear, this sawtooth can be continuous cutting and wearing and tearing teflon pipe (polytetrafluoroethylene), lead to the internal diameter grow of pipe, thereby lead to softening or liquefaction consumptive material to remain in teflon pipe (polytetrafluoroethylene), lead to intraductal consumptive material to block up, thereby can not stably print out the consumptive material. Greatly limiting the life of the throat and the stability of the 3D printer.

The deformation of the teflon tube (polytetrafluoroethylene) is 280-480 ℃, and the melting point is 400-480 ℃, so that the built-in teflon tube (polytetrafluoroethylene) cannot bear higher temperature, for example, the printing temperature of the high polymer material PEEK needs to reach 400-500 ℃, so that some high-temperature-resistant polymer materials or some low-temperature alloy materials cannot be printed, and a 3D printing hot end structure which can bear high temperature, has high mechanical strength and can insulate heat is needed.

Disclosure of Invention

For solving the technical problem, the utility model aims to improve the durability of 3D printing hot junction (shower nozzle) and the hot junction heat abstractor of stability, adopt 304 seamless stainless steel pipe as the choke, 304 stainless steel pipe mechanical strength is high, inside smooth finish is high, wear-resisting corrosion-resistant, not only durable but also energy-conservation, can bear higher temperature (700 supplementarian 800 degrees), can be applied to ordinary temperature and print (90-260 degrees), can be applied to high temperature material again and print (260 supplementarian 600 degrees), and the simple and easy multi-functional 3D printer hot junction of structure, compatible general 1.75mm diameter's consumptive material on the market, the mountable with replace on the 3D printer that exists on numerous markets.

The purpose of the utility model is realized through the following technical scheme: the utility model provides a 3D printer hot junction heat abstractor, includes consumptive material pipe, location aluminum plate, consumptive material transition ring, consumptive material choke, connecting bolt, hexagonal heat dissipation tower, heating block, no screw nozzle.

The positioning aluminum plate is a component connected with the hot end sliding block of the 3D printer and is provided with a fixing hole, a lead perforation and a cooling fan mounting hole; the upper half part of the consumable guide pipe is connected with the positioning aluminum plate through a positioning hole;

the hexagonal heat dissipation tower is connected with the lower half part of the consumable guide pipe through a positioning hole of the positioning aluminum plate and is connected with the consumable throat pipe through a consumable transition ring;

the hexagonal heat dissipation tower is connected through the lower half part of the consumable throat pipe, and the heating area and the heat dissipation cooling area are isolated to form two different areas with larger temperature difference;

the consumable throat pipe is connected with the heating block through a connecting bolt; and a heating rod and a thermocouple mounting hole are reserved in the heating block, and a non-threaded nozzle locking bolt hole is reserved.

Preferably, the hexagonal heat dissipation tower is provided with nine heat dissipation fins, the thickness of the lowest heat dissipation fin is 2-3 times that of each heat dissipation fin on the lower heat dissipation fin, more heat can be absorbed, and the hexagonal heat dissipation tower plays a role in preheating the liquefaction consumable material;

preferably, the heating block and the unthreaded nozzle are made of brass materials with high temperature resistance and good heat conductivity;

preferably, the consumable guide tube enables the consumable form to become a straight line, and the lower part of the consumable guide tube is connected with the consumable transition ring, so that the consumable can be calibrated better and enters the consumable throat tube;

preferably, the consumable throat pipe uses a stainless steel inner wall to replace a traditional Teflon pipe, the outer diameter of the throat pipe is reduced, heat conduction is reduced, and excessive heat of the heating block is prevented from being transferred to the hexagonal heat dissipation tower;

still further preferably, the 3D printer hot junction heat abstractor, the heating piece with the consumptive material choke difference in temperature keeps more than 70% for the consumptive material is the solid state inside the consumptive material choke, is the solid and changes liquid intermediate state between connecting bolt and heating piece, and the consumptive material is in heating piece and the complete liquefaction of unthreaded nozzle department, need to keep the choke to use difficult consumptive material wearing and tearing for a long time moreover.

Compared with the prior art, the utility model has the advantages of as follows:

(1) the consumable is solid when entering the consumable throat pipe, the diameter is kept to be not heated and pressed to be enlarged, the consumable belongs to a solid-liquid intermediate state at the position of entering the connecting bolt, and the consumable enters the heating block and is completely liquid. The upper half part of the throat pipe is connected with the hexagonal heat dissipation tower, so that the upper half part of the throat pipe is well dissipated, the hexagonal heat dissipation tower is not in contact with the connecting bolt and the heating block, direct heat conduction cannot be realized, heat conduction is only limited to consumable throat pipe transmission, the wall of the consumable throat pipe is relatively thin, heat conduction is less, and a small amount of heat energy is dissipated when contacting with the hexagonal heat dissipation tower;

(2) the consumptive material gets into the consumptive material choke can not cause effective wearing and tearing to it, the choke internal diameter remains throughout and is allowing the positive tolerance scope that the consumptive material passes through, so the consumptive material can not be in the inside crooked spring state that forms of choke, the consumptive material can not remain inside the choke, so the material length that the unthreaded nozzle blowout comes is unanimous with the withdrawal length and 3D printer control software, print complicated model or print a plurality of models simultaneously and can not take place the wire drawing phenomenon, prolong the life in 3D printer hot junction greatly when improving print quality.

Drawings

FIG. 13D is an exploded view of a hot side heat sink of the printer;

FIG. 23D is a cross-sectional view of a hot side heat sink of the printer;

FIG. 33D is a diagram illustrating the effect of the heat sink on the hot side of the printer;

reference numerals: 1 consumptive material pipe, 2 location aluminum plate, 3 consumptive material transition rings, 4 consumptive material throats, 5 connecting bolt, 6 hexagonal heat dissipation towers, 601 screw hole, 602 conical feed inlet, 7 heating block, 701 thermocouple mounting holes, 702 heating rod mounting hole, 8 threadless nozzle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 1 and 2, the positioning aluminum plate 2 is a part for connecting the hot end slider of the 3D printer, the holes on the upper part are fixing holes, wire perforation and cooling fan mounting holes, the upper half part of the consumable conduit 1 is inserted into the cross slider, the lower end is connected with the conical feed inlet 602, and the consumable conduit is fixed through the locking bolt threaded hole 601 on the hexagonal cooling tower.

The upper end of the hexagonal heat dissipation tower 6 is connected through a positioning hole of the positioning aluminum plate 2, and the lower end of the hexagonal heat dissipation tower 6 is nested with the consumable transition ring 3 and is fixed through a threaded hole 601 by a bolt.

The consumable throat pipe 4 is connected with the consumable transition ring 3 through the inside of the hexagonal heat dissipation tower 6, and the lower end of the consumable throat pipe is connected with the heating block 7 through the connecting bolt 5.

The hexagonal heat dissipation tower 6 is composed of 9 heat dissipation fins and is used for enlarging the heat dissipation area, wherein the thickness of the bottom fin is thicker so as to absorb more heat on the heat dissipation fins and ensure that consumables can be preheated to a certain extent when passing through throats of the heat dissipation fins.

The hexagonal structure of hexagonal heat dissipation tower 6 can use general spanner installation (same with outer hexagonal screw, common kit of 3D printer all can use) when the timing in order to transfer.

Hexagonal heat dissipation tower 6 and connecting bolt 5 contactless only connect through consumptive material choke 4 the latter half, and better keep apart heating region and heat dissipation cooling region, form two different regions that the difference in temperature is great. The consumable is solid in the hexagonal heat dissipation tower 6, is in a heating to liquefaction intermediate state when passing through the throat pipe and reaching the connecting bolt 5, and is in a complete liquefaction state when reaching the heating block 5 and the unthreaded nozzle.

The heating block 7 and the unthreaded nozzle 8 are both made of brass materials with high temperature resistance and good heat conductivity; a heating rod mounting hole 701 and a thermocouple mounting hole 702 are reserved in the heating block 7, a non-threaded nozzle locking bolt hole is reserved, and the heating block is connected with the non-threaded nozzle 8 through a connecting bolt.

The non-threaded nozzle 8 has better sealing performance and is convenient to install and replace; during installation, too large torsion force is not needed to be used for screwing, and the screwing torsion force is perpendicular to the heating block 5, so that the horizontal positioning of other structures of the heating block 5 cannot be influenced.

When the device works, the consumable catheter 1 enables the form of the consumable to be changed into a straight line, and the lower part of the consumable catheter is connected with a consumable transition ring 3, so that the consumable can be better calibrated and enters a consumable throat 4; the heating block with the consumptive material choke difference in temperature keeps more than 70% for the consumptive material is the solid state in consumptive material choke inside, is the solid and changes liquid intermediate state between connecting bolt and heating block, and the consumptive material is in heating block and the complete liquefaction of unthreaded nozzle department, need to keep the choke to use in addition for a long time difficult by the consumptive material wearing and tearing.

Although the embodiments of the present invention have been described above, the description is only for the convenience of understanding the present invention, and the present invention is not limited thereto. It will be apparent to persons skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. The utility model provides a 3D printer hot junction heat abstractor, includes consumptive material pipe, location aluminum plate, consumptive material transition ring, consumptive material choke, connecting bolt, hexagonal heat dissipation tower, heating piece, no threaded nozzle, its characterized in that:

the upper half part of the consumable guide pipe is connected with the positioning aluminum plate through a positioning hole;

the hexagonal heat dissipation tower is connected with the lower half part of the consumable guide pipe through a positioning hole of the positioning aluminum plate and is connected with the consumable throat pipe through a consumable transition ring;

the consumable throat pipe is connected with the heating block through a connecting bolt;

the heating block is connected with the unthreaded nozzle.

2. The hot side heat sink of claim 1, wherein:

the hexagonal heat dissipation tower is composed of nine heat dissipation fins, and the heat dissipation fin at the lowest part is thicker and is 2-3 times of the thickness of each heat dissipation fin at the upper part.

3. The hot side heat sink of claim 1, wherein:

the hexagonal heat dissipation tower is connected through the lower half part of the consumable throat pipe, so that a heating area is isolated from a heat dissipation cooling area, and two different areas with large temperature difference are formed.

4. The hot side heat sink of claim 1, wherein:

the consumable throat pipe adopts a stainless steel inner wall, and the heating block and the unthreaded nozzle are made of brass materials.

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