A Thermal Embedded Stud Kit for Fused Deposition Modeling 3D Printed Parts

Abstract

The present invention discloses a thermal embedding stud kit for a fused deposition modeling 3D printed part, which relates to the technical fields of 3D printing and additive manufacturing equipment, and the specific international patent classification number that may be involved is B29C67 / 00. It includes: a stud body, with an embedding cap fixed at the lower end of the stud body; the diameter of the upper end surface of the embedding cap is larger than the diameter of the stud body; the embedding cap has a tapered hollow structure that is larger at the top and smaller at the bottom in the vertical direction; a number of diversion holes penetrating the inner cavity of the embedding cap are arranged on the outer side surface of the embedding cap in the circumferential direction; a heat conducting member, which includes a heat conducting sleeve sleeved on the outside of the stud body and a heat conducting backing plate fixed at the lower end of the heat conducting sleeve; the diameter of the heat conducting backing plate is larger than the diameter of the upper end surface of the embedding cap; a guide rod is fixed in the axial direction on the top surface of the inner cavity of the embedding cap; the lower end of the guide rod is tapered and extends to the outside of the inner cavity of the embedding cap. Compared with traditional connectors, the present invention has higher space utilization rate, greater connection strength and is not easy to slip off.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing and additive manufacturing equipment, especially a thermal embedding stud kit for fused deposition modeling 3D printed parts, and the specific international patent classification number that may be involved is B29C67 / 00. Background Art

[0002] The fused deposition modeling 3D printing technology is an important process in additive manufacturing technology and is applicable to the additive manufacturing of metals and thermoplastic non-metallic materials. Among them, the 3D printing of nylon materials is the most popular. Nylon printed parts have high material strength and low density and are often directly used as structural parts in small-batch products. For structural parts with high connection strength requirements, the connection strength of nylon materials themselves cannot be satisfied, and this requires hot embedding metal parts. Generally, the larger the size of the hot embedding parts, the larger the welding contact area and the higher the connection strength. However, the larger the hot embedding parts, the greater the space occupied, which is a thorny problem for precision structural parts with high space utilization requirements. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a thermal embedding stud kit for fused deposition modeling 3D printed parts, which has higher space utilization rate, greater connection strength and is not easy to slip off compared with traditional connectors in view of the above existing technical deficiencies.

[0004] The present invention provides a thermal embedding stud kit for fused deposition modeling 3D printed parts, including: a stud body, with an embedding cap fixed at the lower end of the stud body; the diameter of the upper end face of the embedding cap is larger than that of the stud body; the embedding cap has a tapered hollow structure that is larger at the top and smaller at the bottom in the vertical direction; several diversion holes penetrating the inner cavity of the embedding cap are arranged on the outer side surface of the embedding cap in the circumferential direction;

[0005] A heat conducting member, the heat conducting member includes a heat conducting sleeve sleeved outside the stud body and a heat conducting backing plate fixed at the lower end of the heat conducting sleeve; the diameter of the heat conducting backing plate is larger than the diameter of the upper end face of the embedding cap;

[0006] A guide rod is fixed in the axial direction on the top surface of the inner cavity of the embedding cap; the lower end of the guide rod is conical and extends outside the inner cavity of the embedding cap.

[0007] To further optimize the technical solution, several overflow holes communicating with the inner cavity are arranged on the upper end face of the embedding cap; several material guiding grooves are arranged in the radial direction on the lower end face of the heat conducting backing plate; the starting end of the material guiding groove is located outside the stud body, and the other end of the material guiding groove ends at the outer side surface of the heat conducting backing plate.

[0008] To further optimize the technical solution, a chamfer is arranged on the lower opening end face of the embedding cap facing the inner cavity side.

[0009] To further optimize this technical solution, several partition plates are arranged vertically on the top surface of the inner cavity of the embedding cap.

[0010] To further optimize this technical solution, an internal hexagonal groove is provided at the top of the heat-conducting sleeve.

[0011] To further optimize this technical solution, the stud body is made of brass; the heat-conducting member is made of red copper.

[0012] In the present invention, the embedding cap has a conical hollow structure that is larger at the top and smaller at the bottom in the vertical direction, and several diversion holes penetrating the inner cavity of the embedding cap are arranged on the outer side surface of the embedding cap in the circumferential direction. When heat-embedding into the counterbore of the 3D part, the material melted by the outer side surface of the embedding cap will be squeezed into the inner cavity of the embedding cap through the diversion holes. At the same time, when the material in the corresponding area of the lower opening of the embedding cap enters the inner cavity of the embedding cap, it is thermally melted and externally supported by the guide rod and merged with the molten material squeezed in from the diversion holes. When the material solidifies, the material in the inner cavity of the embedding cap is in an inverted conical shape, and the lower part is integrated with the 3D printed part, which can withstand strong vertical tensile forces; the side surface of the inverted conical material in the inner cavity of the embedding cap is integrated with the material of the embedding cap and the outer side surface of the embedding cap through the diversion holes, which can withstand strong rotational torque.

[0013] Other technical effects of the present invention will become gradually clear in the expansion of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention

[0015] Figure 2 is Figure 1 a schematic diagram in another direction.

[0016] In the figure, 1, stud body; 2, embedding cap; 3, diversion hole; 4, heat-conducting sleeve; 5, heat-conducting backing plate; 6, guide rod; 7, overflow hole; 8, material guide groove; 9, chamfer; 10, partition plate; 11, internal hexagonal groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] As Figure 1 , Figure 2 shown:

[0018] This embodiment provides a heat-embedding stud kit for a fused deposition modeling 3D printed part, including:

[0019] A stud body 1, with an embedding cap 2 fixed at the lower end of the stud body 1; the diameter of the upper end surface of the embedding cap 2 is larger than the diameter of the stud body 1; the embedding cap 2 has a conical hollow structure that is larger at the top and smaller at the bottom in the vertical direction; several diversion holes 3 penetrating the inner cavity of the embedding cap 2 are arranged on the outer side surface of the embedding cap 2 in the circumferential direction;

[0020] Thermal conduction member, the thermal conduction member includes a thermal conduction sleeve 4 sleeved outside the stud body 1 and a thermal conduction backing plate 5 fixed at the lower end of the thermal conduction sleeve 4; the diameter of the thermal conduction backing plate 5 is larger than the diameter of the upper end face of the embedding cap 2;

[0021] A guide rod 6 is fixed in the axial direction on the top surface of the inner cavity of the embedding cap 2; the lower end of the guide rod 6 is conical and extends outside the inner cavity of the embedding cap 2.

[0022] When performing thermal embedding on a 3D printed part, the operating steps are as follows: 1. The thermal conduction sleeve 4 of the thermal conduction member is thermally coupled to an electric soldering iron; 2. Insert the guide rod 6 of the embedding cap 2 into the pre-sunk hole of the 3D printed part; 3. Press the thermal conduction member and the stud body 1 into thermal contact, and the thermal conduction backing plate 5 heats the embedding cap 2 and the thermal conduction sleeve 4 heats the stud body 1. 4. As the material of the 3D printed part is heated and melted, the embedding cap 2 sinks into place. Since the diameter of the thermal conduction backing plate 5 is larger than the diameter of the upper end face of the embedding cap 2, the thermal conduction backing plate 5 will provide a limit indication for sinking into place; 5. Separate the electric soldering iron from the thermal conduction sleeve 4; after the thermal conduction member cools down, remove the thermal conduction member from the stud body.

[0023] Figure 1 The middle diversion holes 3 are arranged in alignment in the vertical direction, but this is not the only arrangement method, and they can also be arranged staggeredly in the vertical direction.

[0024] The mechanism by which the material on the outer side surface of the embedding cap 2 melts and enters the diversion hole 3 is realized through the shape of the embedding cap 2. When the embedding cap 2 sinks downward into the material of the 3D printed part, the force exerted by its conical side on the material can be divided into a vertically downward force and a force perpendicular to the axial direction and outward. The reaction force of the resultant force of these two forces causes the material to have a tendency to flow upward and toward the axis. Therefore, when the flowing material encounters the diversion hole 3, it will be squeezed into the inner cavity of the embedding cap 2. Instead of being extruded from the top along the outer wall of the embedding cap 2, the appearance after the embedding cap 2 is embedded is neater.

[0025] The function of the diversion hole 3 is, on the one hand, to prevent the material from flowing along the embedding cap 2 to the outer surface of the 3D printed part and divert it into the inner cavity of the embedding cap 2 to fill the inner cavity of the embedding cap 2. In this way, after the material solidifies in the inner cavity, the vertical tensile strength is higher; on the other hand, after the material solidifies in the diversion hole 3, it will connect the materials inside and outside the embedding cap 2 into one body. When the stud body 1 is subjected to torsion, it plays an anti-torsion role.

[0026] To further optimize this embodiment, a plurality of overflow holes 7 communicating with the inner cavity are provided on the upper end face of the embedding cap 2; a plurality of material guiding grooves 8 are provided on the lower end face of the thermal conduction backing plate 5 in the radial direction; the starting end of the material guiding groove 8 is located outside the stud body 1, and the other end of the material guiding groove 8 terminates at the outer side surface of the thermal conduction backing plate 5.

[0027] The overflow hole 7 has two functions: 1. When the embedding cap 2 melts and sinks, it discharges the gas inside the embedding cap 2, reduces the air pressure inside the embedding cap 2, reduces the downward pressure, and promotes the filling of the hot-melt material of the embedding cap 2; 2. It discharges the excess hot-melt material to ensure that the embedding cap 2 sinks in place. The material guiding groove at the lower end of the heat-conducting backing plate 5 is used to guide the excess material to the outside to prevent it from entering the heat-conducting sleeve 4 and sticking the stud body 1.

[0028] To further optimize this embodiment, a chamfer 9 is provided on the lower open end face of the embedding cap 2 facing the inner cavity side.

[0029] The function of the chamfer 9 on the lower open end face of the embedding cap 2 is to reduce the downward pressure during hot-melt embedding. The chamfer 9 facing the inner side can make the material entering the inner cavity of the embedding cap 2 gather towards the guide rod 6, improve the thermal coupling effect of the guide rod 6, and avoid the material flowing in from the diversion hole 3 in terms of the flow direction, reducing the inflow resistance of the material entering from the diversion hole 3.

[0030] To further optimize this embodiment, a plurality of partition plates 10 are provided on the top surface of the inner cavity of the embedding cap 2 in the vertical direction.

[0031] The function of the partition plate 10 is to further improve the anti-torsion strength of the connection between the embedding cap 2 and the 3D printed part.

[0032] To further optimize this embodiment, an internal hexagonal groove is provided at the top of the heat-conducting sleeve 4.

[0033] The function of the internal hexagonal groove 11 is that when the heat-conducting backing plate 5 is adhered to the embedding cap 2 by the material, it is easy to peel it off by twisting the internal hexagonal groove 11.

[0034] To further optimize this embodiment, the stud body 1 is made of brass; the brass material has higher strength and is suitable as a stressed structural member. The heat-conducting member is made of red copper. The red copper material has strong thermal conductivity because the heat-conducting member mainly undertakes heat conduction and gives the downward pressure during the hot-melt embedding of the embedding cap 2. It should be noted that the price of red copper is relatively high, and the heat-conducting member is not a disposable consumable embedded in the 3D printed part and can be used multiple times.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0036] In addition, the descriptions involving "first", "second", etc. in the present invention are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A thermal embedding stud kit for a fused deposition modeling 3D printed part, characterized in that, Comprising: A stud body, with an embedding cap fixed to the lower end of the stud body; the diameter of the upper end face of the embedding cap is larger than that of the stud body; the embedding cap has a tapered hollow structure that is larger at the top and smaller at the bottom in the vertical direction; several diversion holes penetrating the inner cavity of the embedding cap are provided on the outer side surface of the embedding cap in the circumferential direction; A heat conducting member, which includes a heat conducting sleeve sleeved outside the stud body and a heat conducting backing plate fixed to the lower end of the heat conducting sleeve; the diameter of the heat conducting backing plate is larger than that of the upper end face of the embedding cap; A guide rod is fixed to the top surface of the inner cavity of the embedding cap in the axial direction; the lower end of the guide rod is tapered and extends outside the inner cavity of the embedding cap; Several overflow holes communicating with the inner cavity are provided on the upper end face of the embedding cap; several material guiding grooves are provided on the lower end face of the heat conducting backing plate in the radial direction; the starting end of the material guiding groove is located outside the stud body, and the other end of the material guiding groove terminates at the outer side surface of the heat conducting backing plate.

2. The thermal embedding stud kit for a fused deposition modeling 3D printed part according to claim 1, characterized in that: A chamfer is provided on the lower opening end face of the embedding cap facing the inner cavity side.

3. A thermal embedding stud kit for a fused deposition modeling 3D printed part according to claim 2, characterized in that Several partition plates are provided on the top surface of the inner cavity of the embedding cap in the vertical direction.

4. A thermal embedding stud kit for a fused deposition modeling 3D printed part according to claim 3, characterized in that An internal hexagonal groove is provided at the top of the heat conducting sleeve.

5. A thermal embedding stud kit for a fused deposition modeling 3D printed part according to claim 1, characterized in that The stud body is made of brass; the heat conducting member is made of red copper.

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