CN215435027U

CN215435027U - Heat dissipation mechanism for 3D printer

Info

Publication number: CN215435027U
Application number: CN202023011262.8U
Authority: CN
Inventors: 张雅林
Original assignee: Tianjin Xianfeng 3d Technology Co ltd
Current assignee: Tianjin Xianfeng 3d Technology Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2022-01-07
Anticipated expiration: 2030-12-14

Abstract

The utility model relates to the technical field of 3D printers and discloses a heat dissipation mechanism for a 3D printer, which comprises a throat, wherein the bottom of the throat is fixedly connected with a nozzle, a heater is fixedly arranged on the side surface of the throat, a radiator is fixedly sleeved on the side surface of the throat, and a first fixed block is movably connected on the side surface of the radiator. This heat dissipation mechanism for 3D printer, through first fixed block, the second fixed block, the slot, the conducting strip, the jack, the conducting rod, the screw thread nozzle stub, the cooling tube, the exhaust hole, the shunt tubes, mutually support between breather pipe and the miniature air pump, can blow in high-pressure cold wind to the cooling tube constantly through miniature air pump, thereby make the conducting rod rapid cooling who is located the cooling tube, reached and be convenient for carry out comprehensive radiating effect to the choke, solved when spout temperature heightening back, the plastics silk is heated the inflation or is softened the position and moves up, and current heat radiation structure is difficult to satisfy the problem of shower nozzle heat dissipation demand under this condition.

Description

Heat dissipation mechanism for 3D printer

Technical Field

The utility model relates to the technical field of 3D printers, in particular to a heat dissipation mechanism for a 3D printer.

Background

A three-dimensional printer, also called a three-dimensional printer, is a rapid printing and forming process, and a three-dimensional model is manufactured layer by layer in a layer-by-layer stacking mode. When carrying out 3D and printing, the plastics silk can get into under conveyor's transmission and be located the inside choke of shower nozzle, then when the outside choke section that has cup jointed the heater of plastics silk, the heater can heat the plastics silk, make it melt to the molten state, and finally extrude from the nozzle, carry out the three-dimensional printing that piles up layer upon layer, because the heater needs to heat the plastics silk fast, so the heater can heat choke and teflon pipe to higher temperature, but the plastics silk that lies in the heater top this moment also can receive the influence of high temperature, probably takes place inflation or softening, so need fix specific heat abstractor in the choke outside.

Traditional 3D prints into shower nozzle and uses heat dissipation mechanism, connect heat radiation fins outside the radiator pipe more, and use small-size radiator fan to carry out the air current heat dissipation to it, but radiator fan is difficult to carry out comprehensive heat dissipation to the radiator pipe because the reason of angle is fixed, when increaseing the spout temperature, the scope that lies in heater top plastic filament and receive the temperature influence can enlarge, so that the position that the plastic filament takes place to expand or soften also can shift up, and current 3D for the printer heat dissipation structure be difficult to satisfy the heat dissipation demand under this condition.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides the heat dissipation mechanism for the 3D printer, which has the advantage of facilitating comprehensive heat dissipation of the throat pipe, and solves the problem that when the temperature of the nozzle is increased, the position of the plastic wire which is heated to expand or soften moves upwards, and the heat dissipation requirement of the nozzle under the condition is difficult to meet by the existing heat dissipation structure.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme: a heat dissipation mechanism for a 3D printer comprises a throat pipe, wherein a nozzle is fixedly connected to the bottom of the throat pipe, a heater is fixedly installed on the side surface of the throat pipe, a radiator is fixedly sleeved on the side surface of the throat pipe, a first fixing block is movably connected to the side surface of the radiator, a second fixing block is hinged to the left side of the first fixing block, slots are respectively opened and closed inside the first fixing block and the second fixing block, heat conducting fins are movably connected inside the slots, jacks are respectively formed in the first fixing block, the second fixing block and the heat conducting fins, heat conducting rods are movably connected inside the jacks, threaded short pipes are respectively fixedly connected to the tops of the first fixing block and the second fixing block, cooling pipes are in threaded connection to the side surfaces of the threaded short pipes, exhaust holes are formed in the cooling pipes, and shunt pipes are movably sleeved on the side surfaces of the cooling pipes, the top of shunt tubes is connected with the breather pipe, the breather pipe is kept away from the one end fixedly connected with miniature air pump of shunt tubes.

Preferably, the fixed snap ring that has cup jointed in side surface of radiator, the snap ring groove has all been seted up to the inside of first fixed block and second fixed block, the side surface of snap ring and the inside swing joint of snap ring groove.

Preferably, the inside of the threaded short pipe is communicated with the inside of the insertion hole, and the side surface of the heat conduction rod is movably connected with the inside of the threaded short pipe.

Preferably, the top of the shunt pipe is fixedly connected with a top pipe, and the side surface of the top pipe is movably connected with the inner wall of the vent pipe.

Preferably, the right sides of the first fixing block and the second fixing block are fixedly connected with connecting blocks, the inner threads of the connecting blocks are connected with locking bolts, and the side surfaces of the locking bolts are connected with locking nuts in a threaded mode.

Preferably, the side surface of the heat conducting rod is fixedly sleeved with a heat conducting silica gel sleeve, and the side surface of the heat conducting silica gel sleeve is movably connected with the inner part of the jack.

Compared with the prior art, the utility model provides a heat dissipation mechanism for a 3D printer, which has the following beneficial effects:

1. this heat dissipation mechanism for 3D printer, through first fixed block, the second fixed block, the slot, the conducting strip, the jack, the conducting rod, the screw thread nozzle stub, the cooling tube, the exhaust hole, the shunt tubes, mutually support between breather pipe and the miniature air pump, can blow in high-pressure cold wind to the cooling tube constantly through miniature air pump, thereby make the conducting rod rapid cooling who is located the cooling tube, reached and be convenient for carry out comprehensive radiating effect to the choke, solved when spout temperature heightening back, the plastics silk is heated the inflation or is softened the position and moves up, and current heat radiation structure is difficult to satisfy the problem of shower nozzle heat dissipation demand under this condition.

2. The heat dissipation mechanism for the 3D printer comprises a first fixing block, a second fixing block, a slot, a heat conduction sheet, a jack, a heat conduction rod, a threaded short pipe, a cooling pipe, a flow division pipe, a vent pipe and a micro air pump which are matched with each other, the heat dissipation capacity of different positions of the throat can be changed by adjusting the number of the heat-conducting fins, when the area above the heater is heated to too high temperature, the plastic wires are bent and soft, which affects the extrusion, the heat conducting fins in the slots in the area can be fully inserted to enhance the heat dissipation capability, when the area below the heater, especially the nozzle, is blocked due to the solidification of the material caused by heat dissipation, can remove this regional fin, prevent that molten state's material from solidifying fast, reach the effect of the different regional heat-sinking capability of the different regions of throat of the adjustment of being convenient for, solve traditional 3D printer and adjusted inconvenient problem with the different regional heat-sinking capability of throat of heat dissipation mechanism.

Drawings

FIG. 1 is a partial cross-sectional view of the present invention;

FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of a first fixing block structure according to the present invention.

Wherein: 1. a throat; 2. a nozzle; 3. a heater; 4. a heat sink; 5. a snap ring; 6. a first fixed block; 7. a second fixed block; 8. a slot; 9. a heat conductive sheet; 10. a jack; 11. a heat conducting rod; 12. a threaded stub; 13. a cooling tube; 14. an exhaust hole; 15. a shunt tube; 16. a breather pipe; 17. a miniature air pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a heat dissipation mechanism for a 3D printer includes a throat 1, a nozzle 2 is fixedly connected to the bottom of the throat 1, the nozzle 2 is a wearing part, and has an irreplaceable effect in the 3D printer process, generally speaking, the 3D printer is divided into the following parts according to the number: the single nozzle 2, the double nozzle 2, the three nozzles 2 and the like are used according to different types of rapid forming machines, the corresponding nozzle 2 is generally used, the structure of the nozzle 2 mainly shows the precision of the nozzle 2, the nozzle 2 is mainly determined according to the printing precision, the hole of the nozzle 2 is generally between 0.2 mm and 1.0 mm, the printing precision of different manufacturers is different, a heater 3 is fixedly arranged on the side surface of a throat 1, a radiator 4 is fixedly sleeved on the side surface of the throat 1, the radiator 4 is composed of a radiating pipe and a radiating fin, the radiating pipe is made of aluminum alloy, the radiating fin is a thin copper sheet, the side surface of the radiating pipe is fixedly connected with the inside of the radiating fin, a clamping ring 5 is fixedly sleeved on the side surface of the radiator 4, clamping ring grooves are respectively arranged inside a first fixing block 6 and a second fixing block 7, the side surface of the clamping ring 5 is movably connected with the inside of the clamping ring grooves, the side surface of the radiator 4 is movably connected with the first fixing block 6, the left side of first fixed block 6 articulates there is second fixed block 7, and the equal fixedly connected with connecting block in right side of first fixed block 6 and second fixed block 7, the inside threaded connection of connecting block has locking bolt, and locking bolt's side surface threaded connection has lock nut.

The heat-conducting strip comprises a first fixing block 6, a second fixing block 7, slots 8-position semi-arc grooves, complete annular grooves are formed after the first fixing block 6 and the second fixing block 7 are closed, heat-conducting strips 9 are movably connected inside the slots 8, the heat-conducting strips 9 are semi-arc strips, when the first fixing block 6 and the second fixing block 7 are closed, the heat-conducting strips on the front side and the rear side form a complete arc-shaped heat-conducting strip 9, the heat-conducting strips 9 are red copper thin strips, the upper side and the lower side of each red copper thin strip are tightly attached to heat radiating fins, jacks 10 are respectively formed in the first fixing block 6, the second fixing block 7 and the heat-conducting strips 9, heat-conducting rods 11 are movably connected inside the jacks 10, the heat-conducting rods 11 are made of red copper, threaded short tubes 12 are fixedly connected to the tops of the first fixing block 6 and the second fixing block 7, the insides of the threaded short tubes 12 are communicated with the insides of the jacks 10, heat-conducting rods 11 are fixedly sleeved with heat-conducting silica gel sleeves, side surface and the inside swing joint of jack 10 of heat conduction silica gel cover, the side surface of heat conduction silica gel cover and the inner wall laminating of jack, the side surface of heat conduction pole 11 and the inside swing joint of screw thread nozzle stub 12, the side surface threaded connection of screw thread nozzle stub 12 has cooling tube 13, exhaust hole 14 has been seted up to the inside of cooling tube 13, shunt tubes 15 has been cup jointed in the side surface activity of cooling tube 13, there are a plurality of interfaces shunt tubes 15 bottom, so that be connected with the cooling tube 13 of different positions, shunt tubes 15's top is connected with breather pipe 16, shunt tubes 15's top fixedly connected with push pipe, the side surface of push pipe and 16's of breather pipe inner wall swing joint.

One end of the vent pipe 16 far away from the shunt pipe 15 is fixedly connected with a miniature air pump 17, through the mutual matching of the first fixing block 6, the second fixing block 7, the slot 8, the heat-conducting fins 9, the jack 10, the heat-conducting rod 11, the threaded short pipe 12, the cooling pipe 13, the shunt pipe 15, the vent pipe 16 and the miniature air pump 17, the heat-radiating capacity of different positions of the throat pipe 1 can be changed by adjusting the number of the heat-conducting fins 9, when the area above the heater 3 is too high in heating temperature, the plastic wires are bent and soft, extrusion is influenced, the heat-conducting fins 9 in the slot 8 in the area can be fully inserted, the heat-radiating capacity is enhanced, when the area below the heater 3, particularly at the nozzle 2, the heat-radiating material is solidified to cause blockage, the heat-conducting fins 9 in the area can be removed, the material in a molten state is prevented from being quickly solidified, and the effect of conveniently adjusting the heat-radiating capacity of different areas of the throat pipe 1 is achieved, the miniature air pump 17 is a VCY series brushless miniature air pump, has speed regulation modes of internal speed regulation, external speed regulation, pump start and stop control and the like, does not need high-power driving, is suitable for being embedded into an automatic control system, adopts a customized nidec brushless motor, is suitable for frequent start and stop or long-term continuous operation working conditions, has strong loading capacity, can continuously operate for a long time, has low noise and good damping device, and can continuously blow high-pressure cold air into the cooling pipe 13 through the miniature air pump 17 by the mutual matching of the first fixing block 6, the second fixing block 7, the slot 8, the heat conducting fin 9, the jack 10, the heat conducting rod 11, the threaded short pipe 12, the cooling pipe 13, the exhaust hole 14, the shunt pipe 15, the vent pipe 16 and the miniature air pump 17 so as to quickly cool the heat conducting rod 11 positioned in the cooling pipe 13, the effect of being convenient for carry out comprehensive heat dissipation to choke 1 has been reached, has solved when the spout temperature increasement back, and the plastics silk is heated the inflation or the softened position moves up, and current heat radiation structure is difficult to satisfy the problem of shower nozzle heat dissipation demand under this condition.

When the device is used, after the 3D printer starts to work, the heater 3 heats the plastic wires in the throat 1 until the plastic wires are in a molten state, and the plastic solution is extruded from the nozzle 2 under the extrusion of subsequent plastic wires, in the process of heating the plastic wires, the throat 1 is quickly heated under the action of the heater, the heated throat 1 firstly transfers heat to the radiator 4, the radiator 4 is attached to the heat conducting sheet 9, the heat is transferred to the heat conducting sheet 9 and finally transferred to the heat conducting rod 11 through the jack 10, at the moment, the micro air pump 17 is started, the micro air pump 17 pumps outside air and pumps the air into the vent pipe 16 through pressurization treatment, the air entering the vent pipe 16 respectively enters the cooling pipes 13 at different positions through the shunt pipe 15, the heat conducting rod 11 in the cooling pipe 13 is cooled through heat dissipation, and the heated air is discharged from the vent hole 14 after heat exchange, the process is repeated continuously when the 3D printer works, so that the sprayer of the 3D printer can be ensured to operate normally.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a 3D printer is with heat dissipation mechanism, includes choke (1), its characterized in that: the bottom of the throat pipe (1) is fixedly connected with a nozzle (2), a heater (3) is fixedly installed on the side surface of the throat pipe (1), a radiator (4) is fixedly sleeved on the side surface of the throat pipe (1), a first fixing block (6) is movably connected to the side surface of the radiator (4), a second fixing block (7) is hinged to the left side of the first fixing block (6), slots (8) are opened and closed in the first fixing block (6) and the second fixing block (7), heat-conducting fins (9) are movably connected in the slots (8), jacks (10) are formed in the first fixing block (6), the second fixing block (7) and the heat-conducting fins (9), heat-conducting rods (11) are movably connected in the jacks (10), and threaded short pipes (12) are fixedly connected to the tops of the first fixing block (6) and the second fixing block (7), the side surface threaded connection of screw thread nozzle stub (12) has cooling tube (13), exhaust hole (14) have been seted up to the inside of cooling tube (13), shunt tubes (15) have been cup jointed in the side surface activity of cooling tube (13), the top of shunt tubes (15) is connected with breather pipe (16), breather pipe (16) keep away from the miniature air pump (17) of one end fixedly connected with of shunt tubes (15).

2. The heat dissipation mechanism for a 3D printer according to claim 1, characterized in that: the fixed snap ring (5) that has cup jointed in side surface of radiator (4), the snap ring groove has all been seted up with the inside of second fixed block (7) in first fixed block (6), the inside swing joint of side surface and snap ring groove of snap ring (5).

3. The heat dissipation mechanism for a 3D printer according to claim 1, characterized in that: the interior of the threaded short pipe (12) is communicated with the interior of the jack (10), and the side surface of the heat conducting rod (11) is movably connected with the interior of the threaded short pipe (12).

4. The heat dissipation mechanism for a 3D printer according to claim 1, characterized in that: the top of the shunt pipe (15) is fixedly connected with a top pipe, and the side surface of the top pipe is movably connected with the inner wall of the vent pipe (16).

5. The heat dissipation mechanism for a 3D printer according to claim 1, characterized in that: the equal fixedly connected with connecting block in right side of first fixed block (6) and second fixed block (7), the inside threaded connection of connecting block has locking bolt, locking bolt's side surface threaded connection has lock nut.

6. The heat dissipation mechanism for a 3D printer according to claim 1, characterized in that: the side surface of the heat conducting rod (11) is fixedly sleeved with a heat conducting silica gel sleeve, and the side surface of the heat conducting silica gel sleeve is movably connected with the inner part of the jack (10).