CN214164029U - Throat part, heat transfer module and fused deposition mechanism - Google Patents

Abstract

The utility model relates to a choke part, heat transfer module and fused deposition mechanism. Wherein the fused deposition mechanism is applied in an additive manufacturing device and comprises a heat transfer module, and the heat transfer module comprises a throat part, the throat part comprises an adapter outer pipe which can be connected with a heat conducting block of the fused deposition mechanism, and a heat insulation liner which can be inserted into the adapter outer pipe in a matching way and extends to the position where the adapter outer pipe and the heat conducting block are intersected, wherein the heat insulation liner is made of Teflon, titanium alloy or ceramic material. Above-mentioned throat part can improve the heating effect of heat conduction block to printing material when reducing printing material and taking place the risk of blockking up at the throat part to avoid thermal-insulated bushing pipe to restrict the efficiency that fused deposition mechanism melted printing material.

Description

Throat part, heat transfer module and fused deposition mechanism

Technical Field

The utility model belongs to the technical field of the vibration material disk, concretely relates to choke part, heat transfer module and fused deposition mechanism.

Background

The fused deposition mechanism is one of core components in an additive manufacturing device (commonly called a 3D printer), and mainly comprises a radiator, a throat pipe component, a heat conduction block body, an electric heating element and a nozzle component, wherein one end of the throat pipe component is embedded in the radiator, the heat conduction block body is connected with the other end of the throat pipe component through a thread structure, the electric heating element is embedded in the heat conduction block body, and the nozzle component is arranged at one end, far away from the throat pipe component, of the heat conduction block body. In the printing process, the solid printing material is firstly pushed into the fused deposition mechanism by the pushing mechanism and immediately turns into a liquid material with high fluidity when entering the heat conducting block, and then the liquid material is discharged by the nozzle component and the printing operation is executed. However, since the solid printing material needs to be softened and then melted into a liquid material, a section of the printing material in a softened state is formed in the throat part, and the softened printing material has poor fluidity and is more likely to accumulate in the throat part as the length thereof is longer, thereby causing a problem of clogging of the throat part and blocking the printing process.

In order to reduce the risk of clogging of the printing material in the throat member, the throat member of the prior art generally comprises an adapter outer tube for connection to the block and an insulating liner inserted in the block and having the same axial dimensions as the adapter outer tube. The switching outer tube that current throat pipe part used the axial dimensions the same with thermal-insulated, the bushing pipe not only has the advantage that reduces the printing material and take place to block up the risk in the throat pipe part, but also has low cost's advantage, but this application inventor finds in the work of perfecting and after the strength of strength, this kind of mode also has certain defect, when switching outer tube and heat conduction block are connected promptly, the switching outer tube can be brought into the part of thermal-insulated bushing pipe in the heat conduction block, the heat-insulated bushing pipe that local entering in the heat conduction block can reduce the heating effect of heat conduction block to printing material, the efficiency of restriction fused deposition mechanism melting printing material.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned whole or partial problem, the utility model aims to provide a throat part, heat transfer module and fused deposition mechanism, it can improve the heating effect of heat conduction block to printing material when reducing printing material and taking place the risk of blockking up at the throat part to avoid thermal-insulated bushing pipe to restrict the efficiency that fused deposition mechanism melted printing material.

According to the utility model discloses an aspect provides a throat part, its use is in the fused deposition mechanism of additive manufacturing device and is used for carrying printing material, including can with the switching outer tube that fused deposition mechanism's heat conduction block is connected and can insert matchingly in the switching outer tube and extend to the thermal-insulated bushing pipe of the crossing position of switching outer tube and heat conduction block, wherein thermal-insulated bushing pipe is made by teflon, titanium alloy or ceramic material.

Furthermore, an external thread is arranged on the switching outer tube, and the external thread can be matched with an internal thread arranged in the heat conducting block.

According to a second aspect of the present invention, there is provided a heat transfer module for use in a fused deposition mechanism of an additive manufacturing apparatus and for conveying a printing material, comprising: a heat conductive block capable of conducting heat and promoting melting of a printing material passing therethrough; and the throat pipe part comprises an adapter outer pipe connected with the heat conducting block and a heat insulation liner pipe which can be inserted into the adapter outer pipe in a matching mode and extends to the position where the adapter outer pipe and the heat conducting block intersect, wherein the heat insulation liner pipe is made of Teflon, titanium alloy or ceramic materials and can guide printing materials into the heat conducting block.

Further, the switching outer tube and the heat conduction block are of an integrated structure.

Further, the connection between the switching outer tube and the heat conduction block body is detachable connection.

Further, the detachable connection is a threaded connection.

Further, the heat conduction block and the adapter outer tube are made of brass, aluminum alloy, stainless steel, die steel, titanium alloy or beryllium copper material.

Further, the heat conducting block body further comprises a circular flow channel formed in the heat conducting block body and capable of being in matched butt joint with the channel of the heat insulating liner, and an internal threaded hole formed in the heat conducting block body and coaxial with the circular flow channel, wherein the internal threaded hole is used for connecting a nozzle component of the additive manufacturing device and enabling an output channel of the nozzle component to be in matched butt joint with the circular flow channel.

According to the utility model discloses a third aspect provides a fused deposition mechanism, and it uses in the additive manufacturing device and can melt earlier the printing material and export again, include: the above heat transfer module; a radiator fixedly sleeved on the throat part of the heat transfer module; an electrical heating element embedded on the thermally conductive block of the heat transfer module; and the nozzle component is arranged at one end of the heat conduction block body far away from the throat part and is used for receiving the printing material conveyed by the heat conduction block body and outputting the printing material.

Further, the fused deposition mechanism also comprises a temperature measuring element embedded in the heat conducting block.

According to the throat part of the present invention, the heat transfer module including the throat part, and the molten deposition mechanism including the heat transfer module, wherein the throat pipe part mainly comprises an adapter outer pipe and a heat insulation liner pipe, and the heat insulation liner pipe made of Teflon, titanium alloy or ceramic materials has the advantages of low heat conductivity coefficient, low friction coefficient, high corrosion resistance and the like, so the printing material guided by the heat conducting block can enter the heat conducting block permanently and smoothly, the risk of blockage of the printing material in a softened state in the throat pipe part is reduced, and the heat insulating liner pipe in the throat pipe part extends to the position where the switching outer pipe is intersected with the heat conducting block, this can avoid being in thermal-insulated bushing pipe influence heat conduction block to the heating of printing material of heat conduction block in the heat conduction block, so can improve the heating effect of heat conduction block to printing material to avoid thermal-insulated bushing pipe to restrict the efficiency that fused deposition mechanism melted printing material. Therefore, the throat part can reduce the risk of blockage of the printing material in the throat part, and meanwhile, the heating effect of the heat conduction block on the printing material is improved, and the heat insulation liner is prevented from limiting the efficiency of the fused deposition mechanism for melting the printing material. The technical knowledge known in the art is that each fused deposition mechanism can only perform high-efficiency and non-blocking printing on printing materials with a certain melting point range, but through a large number of experiments, the fused deposition mechanism using the throat pipe part of the utility model can use the printing materials with higher melting points and perform high-efficiency and non-blocking printing, and the printing materials can not be used in the existing fused deposition mechanism.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure:

fig. 1 is a schematic view of a fused deposition mechanism for an additive manufacturing apparatus according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a heat transfer module for an additive manufacturing apparatus according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a throat section for an additive manufacturing apparatus according to an embodiment of the invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a fused deposition mechanism for an additive manufacturing device according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a heat transfer module for an additive manufacturing apparatus according to an embodiment of the present invention. As shown in fig. 1 and 2, the fused deposition mechanism 400 according to the embodiment of the present invention is applied to an additive manufacturing apparatus and can melt a printing material before outputting, and mainly includes a heat transfer module 100, a heat sink 200, an electric heating element, and a nozzle member 300. The heat transfer module 100 is used for conveying a printing material, and includes a heat conductive block 2 and a throat part 1. The heat conductive block body 2 is capable of conducting heat and causing the printing material passing therethrough to melt. As shown in fig. 3, the throat part 1 includes an adapter outer tube 11 connected to the heat conductive block 2 and an insulating liner tube 12 fittingly inserted into the adapter outer tube 11 and extending to a position where the adapter outer tube 11 intersects the heat conductive block 2, wherein the insulating liner tube 12 is made of teflon, a titanium alloy, or a ceramic material, and guides the printing material into the heat conductive block 2. The heat sink 200 is fixedly sleeved on the throat part 1 of the heat transfer module 100, and is used for dissipating heat of the throat part 1, and reducing the risk of blockage of the throat part 1 by the printing material. The heat sink 200 is preferably, but not limited to, a finned heat sink. The electric heating element is embedded in the heat conductive block 2 of the heat transfer module 100, and can provide heat energy to the heat conductive block 2. The electrical heating element is preferably a heating wire, a thermistor or an electrothermal film. The nozzle member 300 is provided on an end of the heat conductive block body 2 remote from the throat part 1, for receiving the printing material conveyed by the heat conductive block body 2 and outputting it.

Preferably, the fused deposition mechanism 400 of the embodiment of the present invention further includes a temperature measuring element embedded in the heat conducting block 2, and the temperature of the heat conducting block 2 can be conveniently and quickly obtained, so as to control the temperature of the electric heating element based on the temperature of the heat conducting block 2. The temperature measuring element is preferably a thermal resistance type temperature measuring sensor or a thermocouple type temperature measuring sensor.

In order to mount the electric heating element and the temperature measuring element on the heat conducting block 2 of the heat transfer module 100, a first groove 21 and a second groove 22 may be provided on the heat conducting block 2. Wherein the first recess 21 is adapted to receive an electrical heating element of an additive manufacturing apparatus and the second recess 22 is adapted to receive a temperature measuring element of the additive manufacturing apparatus. In this manner, one is permitted to adjust the type and style of the electrical heating element and temperature sensing element as desired. To prevent the electrical heating element and the temperature sensing element from being accidentally dislodged from the thermally conductive block 2 and causing undesirable results, the fused deposition mechanism 400 can further include a screw that can be screwed into the thermally conductive block 2 of the heat transfer module 100 and tightened against the electrical heating element or the temperature sensing element.

The throat pipe part 1, the heat transfer module comprising the throat pipe part 1 and the fused deposition mechanism 400 comprising the heat transfer module 100 of the embodiment of the invention are provided, wherein the throat pipe part 1 mainly comprises the switching outer pipe 11 and the heat insulation liner pipe 12, because the heat insulation liner pipe 12 made of Teflon, titanium alloy or ceramic material has the advantages of lower heat conductivity coefficient, lower friction coefficient, higher corrosion resistance and the like, the printing material guided by the throat pipe part can durably and smoothly enter the heat conduction block 2, the risk of blocking the printing material in the softening state in the throat pipe part 1 is reduced, and because the heat insulation liner pipe 12 in the throat pipe part 1 extends to the position where the switching outer pipe 11 and the heat conduction block 2 intersect, the heating effect of the heat conduction block 2 on the printing material can be avoided that the heat insulation liner pipe 12 in the heat conduction block 2 influences the heating of the heat conduction block 2, so that the heating effect of the heat conduction block 2 on the printing material can be improved, and to avoid insulating liner 12 from limiting the efficiency of fused deposition mechanism 400 in melting the marking material. Therefore, the throat part 1 can reduce the risk of blockage of the printing material in the throat part 1, and simultaneously can help to improve the heating effect of the heat conduction block body 2 on the printing material, and avoid the heat insulation liner pipe 12 from limiting the efficiency of the melting deposition mechanism 400 for melting the printing material. The technical knowledge known in the art is that each fused deposition mechanism 400 can only perform efficient and non-clogging printing on printing materials with a certain melting point range, but through a large number of experiments, it is unexpectedly found that the fused deposition mechanism 400 using the throat part 1 of the present invention can use printing materials with higher melting points and perform efficient and non-clogging printing, which cannot be used in the existing fused deposition mechanism.

When the material of construction of the insulating liner 12 is teflon, it not only reduces the risk of the marking material clogging the throat section 1, but also widens the application range of the insulating liner 12 to the marking material. Specifically, the thermal insulation lining tube 12 in the prior art is a teflon tube and is inserted into the thermal conductive block 2, once the melting point of the printing material is relatively high (for example, > 160 ℃), the temperature of the thermal conductive block 2 will be relatively high, and the teflon tube inserted into the thermal conductive block 2 will be heated by the heated thermal conductive block 2 to soften and deform, thereby blocking the printing process. However, in this embodiment, the thermal insulation liner tube 12 made of teflon only extends to the position where the adapter outer tube 11 intersects with the heat conducting block 2, which can reduce the contact area and the heat conduction effect between the thermal insulation liner tube 12 made of teflon and the heat conducting block 2, and when printing a printing material with a high melting point (for example, greater than 160 ℃ and less than 200 ℃), the thermal insulation liner tube 12 made of teflon is not easily softened and can ensure that the additive manufacturing apparatus performs normal printing.

The heat conducting block body 2 and the throat part 1 can be selected to be of an integrated structure or a split structure. When the heat conducting block body 2 and the throat pipe part 1 are selected to be of a split structure, the connection between the switching outer pipe 11 and the heat conducting block body 2 is detachable. Preferably, the detachable connection between the adapter outer tube 11 and the heat conducting block 2 is a threaded connection, and an external thread 121 is provided on the adapter outer tube 11, and the external thread 121 can be matched with an internal thread provided in the heat conducting block 2. In this embodiment, the heat conducting block 2 and the throat part 1 are of an integral structure. Because the heat conduction block 2 and the throat part 1 of integral type structure have abandoned the screw thread structure that leads to stress concentration phenomenon in the throat part 1, so can further reduce the risk that breaks takes place in the junction of throat part 1 and heat conduction block 2, can effectively reduce the risk that breaks takes place in the junction of throat part 1 and heat conduction block 2 through these two kinds of modes, and permit the volume of heat conduction block 2 to become bigger in order to relax the restriction to the efficiency that fused deposition mechanism 400 melts the printing material, it has positive effect to the development of material increase manufacturing installation orientation faster, better printing direction.

In the present embodiment, the heat conducting block 2 and the adapting outer tube 11 can be made of brass, aluminum alloy, stainless steel, die steel, titanium alloy or beryllium copper material. Because brass, aluminum alloy, stainless steel, die steel, titanium alloy or beryllium copper material all have wear-resisting, the anti-corrosion characteristic, consequently can reduce printing material to the corruption and the wearing and tearing of larynx part 1 to guarantee that heat conduction block 2 has higher life. When the heat conducting block 2 and the throat part 1 are made of stainless steel, titanium alloy, beryllium copper and the like, the strength of the stainless steel, the titanium alloy and the beryllium copper is better than that of common brass and aluminum alloy, so the throat part 1 made of the materials has higher strength, and the risk of fracture of the throat part 1 at the joint of the throat part 1 and the heat conducting block 2 can be reduced.

In this embodiment, heat conduction block 2 further comprises a circular flow channel 41 formed in heat conduction block 2 and capable of mating interfacing with the channel of insulating liner 12, and an internally threaded bore 42 formed in heat conduction block 2 and coaxial with circular flow channel 41, wherein internally threaded bore 42 is used to connect nozzle member 300 of an additive manufacturing device and to mate interface the output channel of nozzle member 300 with circular flow channel 41. This heat transfer module 100 does not adopt the nozzle component 300 that runs through the heat conduction block 2 and with the integral forming of throat part 1, has guaranteed that the printing material can with heat conduction block 2 direct contact in circular runner 41, has avoided the heat to produce the loss because of indirect transmission through other media to can effectively promote fused deposition mechanism 400 and melt the efficiency of printing material. Since the conventional nozzle member 300 is provided with the external thread 121, the conventional nozzle member 300 can be directly mounted in the internal thread hole 42 of the heat conductive block body 2 without any additional design.

To sum up, the utility model discloses fused deposition mechanism 400 can realize following efficiency with the help of throat part 1, can improve the heating effect of heat conduction block 2 to printing material when reducing printing material and taking place the risk of blockking up at throat part 1 promptly to avoid thermal-insulated bushing pipe 12 to restrict fused deposition mechanism's efficiency of melting printing material.

In the description of the present application, it is to be understood that the terms "inside", "outside", and the like refer to orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention, and such changes or variations should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A throat member for use in a fused deposition mechanism of an additive manufacturing apparatus for transporting a printing material, the throat member comprising an adapter outer tube connectable to a heat conducting block of the fused deposition mechanism and a thermal insulation liner tube mateably inserted in the adapter outer tube and extending to a position where the adapter outer tube intersects the heat conducting block, wherein the thermal insulation liner tube is made of teflon, a titanium alloy or a ceramic material.

2. The throat section of claim 1, wherein the outer adapter tube has external threads that mate with internal threads provided in the heat conducting block.

3. A heat transfer module for use in a fused deposition mechanism of an additive manufacturing device and for transporting a printed material, comprising:

a heat conductive block capable of conducting heat and promoting melting of a printing material passing therethrough;

and the throat pipe part comprises an adapter outer pipe connected with the heat conducting block and a heat insulation liner pipe which can be inserted into the adapter outer pipe in a matching mode and extends to the position where the adapter outer pipe and the heat conducting block intersect, wherein the heat insulation liner pipe is made of Teflon, titanium alloy or ceramic materials and can guide printing materials into the heat conducting block.

4. A heat transfer module as claimed in claim 3, wherein the transition outer tube and the thermally conductive block are a unitary structure.

5. A heat transfer module as claimed in claim 3, wherein the connection between the transition outer tube and the thermally conductive block is a detachable connection.

6. A heat transfer module as defined in claim 5, wherein the detachable connection is a threaded connection.

7. A heat transfer module as claimed in claim 3, wherein the thermally conductive block and transition outer tube are made of brass, aluminum alloy, stainless steel, die steel, titanium alloy, or beryllium copper material.

8. A heat transfer module as defined in claim 3, wherein the heat conductive block further comprises a circular flow passage formed within the heat conductive block and mateably dockable with the channel of the thermal isolation liner, and an internally threaded bore formed within the heat conductive block and coaxial with the circular flow passage, wherein the internally threaded bore is to connect a nozzle member of the additive manufacturing device and mate an output channel of the nozzle member with the circular flow passage.

9. A fused deposition mechanism applied to an additive manufacturing device and capable of melting a printing material before outputting the printing material, comprising:

the heat transfer module of any of claims 3 to 8;

a radiator fixedly sleeved on the throat part of the heat transfer module;

an electrical heating element embedded on the thermally conductive block of the heat transfer module;

and the nozzle component is arranged at one end of the heat conduction block body far away from the throat part and is used for receiving the printing material conveyed by the heat conduction block body and outputting the printing material.

10. A molten deposition mechanism according to claim 9, further comprising a temperature sensing element for embedding in the thermally conductive block.

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