A device for splicing 3D printing wire material

Technical Field

The invention belongs to the 3D printing field, relates to a device for jointing two 3D printing wire tool, in particular to a through the high-temperature melting two wire end, and the splicing together of the tool.

Background Art

Now, desktop-level 3D printer have become increasingly popular, as the most common printer - FDM type printer, the use of ABS, PLA or add other material component of the resin printing material in the course of using many questions, are as follows:

1. if (Figure 1) is shown, now 3D printer in order to realize the multi-color printing, mounting a plurality of nozzles, each nozzle is provided with a wire of different colors, different time in the course of printing, the use of different parts of the different nozzle printing. Although the functions are more powerful than a single-nozzle printer, but the price is higher than the latter very many, so now on the market for single-nozzle printer majority share. However single nozzle printer can only use a roll of color of wire, each of which is a roll of wire is a single color, even if color wire did not approach the color changing inclinations to by the user, so the use of a single-nozzle printer to achieve the multi-color printing there is a big difficulties.

2. as 3D one of the features of the printer, a print order, can be under the condition that the user does not care automatically accomplish the task of printing. But the user leaving the printer must be selected before the printer printing of sufficient length of the wire, otherwise, if the printing wire when the user is not in the presence of a depleted, the task of printing will be declared a failure. Therefore, when each of the coil wire is soon draw the remainder of the use for certain printing tasks when not enough, in most cases will be discarded by the user, cause the remainder of the waste.

3. during the printing process, sometimes encountered due to the error estimate the consumption of the material, caused by the depletion in the course of printing material, unable to accomplish the task of printing. So the user will be in when the wire is to be used, on the new the wire rod continues, makes the printer to continue to work. Because each printer to replace the wire the degree of difficulty of different, users are unable to timely continued from above new wire, caused a certain amount of time in the course of printing the phenomenon appearing in the broken, would affect print quality, one's printing failure. And in a state of confusion on the continues process of new wire and is easy to scald the phenomenon of the user.

4. now foreign 3D printing industry in to the emergence of a two wire to melt and splicing tool, as shown in Figure 3. This tool is composed of upper and lower two heating blocks, and the heating block are respectively provided with a central slot, the two grooves as shown in Figure 4, splicing can just be spliced with the print wire is the same as the diameter of the circular hole. if like 5 shown, the two wire rods are respectively from the two ends of the first is inserted into the circular groove, in the heating block on the central portion of the contact. Heating the two heating block to a certain temperature, to make the two wire in the heating block part of the circular hole in the molten state, in this process the pressing two heating block, two of the molten wire because the viscosity are bonded together in the end. After cooling heating block, wire at the same time cooling, because the round hole of the constraint, so that the cooling of the spliced portions still keeps the diameter of the wire should have. But this tool there are the following two deficiencies: 1st: heating large area, but the end of the splicing only needs a very small part of sufficient to fusion, therefore the existence of a serious energy waste, but also make the heating block and wire cooling to room temperature is very slow, time consuming and too long; 2nd: wire heated area large brings another problem, the end of the wire in addition to the splicing of the parts other than the molten after cooling easily a distorted deformation of the, in the wire when the blocking phenomenon easily occurs.

Content of the invention

The utility model the technical problem to be solved to the now single nozzle printer is difficult to realize the multi-color print, replace or butt joint wire too complicated and dangerous, and in view of the welding wire method abroad there exist many deficiencies. This invention has designed a more simple and practical 3D printing wire welding tool, the two wire rods can be heated to a certain temperature the most end of the melt and splice together, then processing fusion place superfluous wire, make the line diameter of the return to original size. The tool not only solves the problem of appeal, more to achieve the low energy consumption, time consuming and short, welding quality is better.

The utility model of the technical proposal is: a for splicing a 3D printing wire device, characterized in that comprises a power supply 41, constant temperature circuit control board 42 and wire welding pliers 45; power supply 41 and the thermostatic circuit control board 42 on the power supply interface is connected, for the whole device in addition to the power supply 41 to other components of the power supply; constant temperature circuit control board 42 and wire welding pliers 45 connected; the wire welding pliers 45 comprises a bottom plate 23, heating plate 15, the cooling fan 16, the handle 1st 19, 2nd handle 20, 1st clamping block 30, 2nd clamping block 31, 3rd clamping block 34, 4th clamping block 35, 1st spring 24, 2nd spring 25 and 3rd spring 26; the handle 1st 19 and 2nd handle 20 in the hinge point 27 is articulated with each other, and the hinge point 27 is fixed on the bottom plate 23 on; the handle 1st 19 and 2nd handle 20 is connected with a 1st between the spring 24, and the 1st spring 24 the initial state to the compressed state; the two handle close to the hinged on each provided with a through hole 28, the bottom plate 23 of the two constraints on projection 29 passes through the two casings of the hole, to restrain the handle 19 of the rotation range, and the through hole is larger than the inner diameter of the bottom plate 23 of the bound on the outer diameter of the cylindrical projection; the handle 1st 19 of the clamp is fixedly connected at the 4th clamping block 35, 2nd handle 20 of the clamp at the clamping block is fixedly connected with a 2nd 31; 1st clamping block 30 and 2nd clamping block 31 near the bottom plate 23 relative to the side edge of the articulated with each other, so that the two clamping block can rotate around the joint the side edge of the, 3rd clamping block 34 and 4th clamping block 35 near the bottom plate 23 relative to the side edge of the articulated with each other, so that the two clamping block can around the joint the side edge of the rotation; the bottom plate 23 close to the 1st clamping block 30 and 3rd clamping block 34 is arranged at one end of the two symmetrical convex, the bottom plate 23 is provided with projections between the U-shaped opening is provided with a, and between the two protruding through a connecting bar; 1st clamping block 30 and its opposite convex connected between the 2nd spring 25, 3rd clamping block 34 and its opposite convex connected between the 3rd spring 26, 2nd spring 25 and 3rd spring 26 completely the same, and are always in a state of compression; in 1st clamping block 30 and 2nd clamping block 31 two two opposite surface, 3rd clamping block 34 and 4th clamping block 35 two opposite the same is arranged on the surface of the semicircular groove 32, so that the clamping block two jointed to form a circular through hole, the axis of the through hole with the side edge of the clamping block are connected to each other are parallel to each other; manual break canada holds the block 1st 30 and 2nd clamping block 31, 3rd heating holding blocks 34 and 4th canada holds the block 35, the two different wire: 1st wire 38 and 2nd wire 39 respectively put into the two through holes, the inner diameter of the through hole equal to the outer diameter of the wire; grasping the handle, so that the clamping block and the wire, to drive the wire is oblique to the central close and, when the two contact heating the end of the wire 15, the wire contact heating plate 15 and the end of the melt; heating plate 15 to far away from, the cooling fan 16 close to the wire, and the two wire rods to the central close to continue, then the two wire rods of the contact on the end of the melt, and are bonded together, form the drum fusion connection point 40, through the cooling fan 16 cooling, the drum fusion connection point 40 cooling harden; in the 2nd clamping block 31 and 4th clamping block 35 on the side opposite to, 1st clamping block 30 and 3rd clamping block 34 is arranged on the opposite side of the identical semi-circular slots, so that the 1st clamping block 30 and 2nd clamping block 31 are jointed with each other, 3rd clamping block 34 and 4th clamping block 35 are jointed with each other to form a conical projection of the edge of the 33; in close to the process, the conical projection on the canada holds the blockshape cutting edge 33 will be drum fusion connection point 40 at the surplus material removal, make the wire at the inner diameter of the weld of the inner diameter of the other parts of the line.

The utility model for further technical scheme is: the heater 15 and the cooling fan 16 through the L-shaped connecting rod 36 connected, L-shaped connecting rod 36 sleeve on the connecting rod; so that the L-shaped connecting rod through the hand 36 drives the heating plate 15 and the cooling fan 16 in the plate and the bottom plate 23 in the plane perpendicular to the plane of rotation.

The utility model for further technical scheme is: the conical protruding sharp, to form a taper-like knife edge.

The utility model for further technical scheme is: the thermostatic circuit control board 42 on the display screen 43 for real-time display sheet 15 of the temperature, the cooling fan and the completion of the working state of the wire splicing of steps.

The utility model for further technical scheme is: the thermostatic circuit control board 42 on the temperature adjusting knob 44 is used for the splicing wire different from the material of the heating required to set up different melt temperature value.

The utility model for further technical scheme is: the thermostatic circuit control panel 42 is white light circuit control board.

The utility model for further technical scheme is: the heating plate 15 is a sheet metal, the material used is made of red copper.

The utility model of the work process is: the two different wire are respectively inserted into the 1st clamping block 30 and 2nd clamping block 31, 3rd clamping block 34 and 4th clamping block 35 in the form of columnar through hole, the rotation of the L-shaped connecting rod 36 so that the heating plate 15 is located in the 1st clamping block 30 and three clamping block 34 in the middle of the area, (and to make the two wire end portions of the two side faces of the clinging to the heating plate), grasping the handle, 1st canada holds the block 30 and 2nd clamping block 31, 3rd heating holding blocks 34 and 4th canada holds the block 35 (to the central close to the same time of) the upward movement, so that the 2nd spring 25 and 3rd spring 26 to continue to compression, so that the 1st canada holds the block 30 and 2nd clamping block 31 pressing in the through hole of the wire, by the same token the 3rd heating holding blocks 34 and 4th canada holds the block 35 pressing in the through hole of the wire, at the same time, close to the center, so that the two wire end contact at the same time (and to continue to hold-down) heating plate 15, through the thermostatic circuit control panel 42 to the heating plate 15 heating, make the wire with the heating plate 15 is in contact with the end is molten; the rotation of the L-shaped connecting rod 36, (it makes the heating piece away from the two wire the central region, and at the same time) to drive the cooling fan 16 close to the clamping block; continue to firmly grasp the handle, so that the two wire ends of the central close to the Department to continue, squeeze each other and bonded together, at this moment the two wire rods are welded at the weld point forming drum; opening (radiating) fan (16), drum fusion by wind heat radiation, the rapid cooling to room temperature, drum welding point cooling hardens, so that the two wire rods are firmly bonded together; continue to firmly grasp the handle, with the two holding blocks continue to type close, but after bonding of the wire can no longer movement, can only relative clamping block in the circular hole 13 in sliding, two tapered edge 33 to continue to close to the center of the, in this process, the wire clamping block in the circular hole 13 is in the sliding state, until the two tapered edge 33 contact with each other and pressing on the, drum fusion connection point 40 at the surplus material is completely conical edge cutting removing, the original drum fusion connection point 40 into contact with the round hole at 13 the same as the diameter of the wire.

The effect of this invention

The technical effects of the utility model is characterized in that: in the 3D printer of the increasing popularity of the current state, the invention is directed to 3D printer of a user using the problems encountered in the process of the inconvenience, such as the use of a single-nozzle printer is difficult to realize the multi-color printing, the various rolls of wire remaining after a small amount of excess material cannot be fully utilized, in the course of printing a roll of wire used up cannot be timely continued from above new wire so that the printing failure, and replacement of the wire are easily caused when the problem of scald. While foreign 3D printing enthusiasts invention for splicing two 3D printing wire tool but also numerous problems. In this invention, such as (Figure 22) shown, the heating source is reduced to a thin copper sheet, wire molten part only in the wire end very small regional, after the wire splice together, the heat dissipation fan 16 begin the cooling, in extreme time can make the wire splicing cooling and solidification, the other area is not affected, the final block for sharp taper edge 33 of the drum cut pieces, the invention will the whole process integrated in a tool in, convenient and safe use not only fast, but also greatly improves the welding quality. Thus thoroughly now 3D printer in the course of using many problems, for example to realize the single nozzle printer multi-color printing as shown in Figure 2, the remainder is to take full advantage of the waste is reduced, convenient and safe replacement of the wire.

Description of drawings

Figure 1 of the existing double-nozzle for multi-color printing process schematic view

Figure 2 is the use of a single nozzle after the invention schematic view multi-color printing process

Figure 3 is the fusion splicer model structure diagram of the foreign prior art

Figure 4 is split into two semi-schematic view of a round hole

Figure 5 is the schematic view of the two wire rods are inserted into the heating block in the

Figure 6 is the device structure diagram

Figure 7 is a structure diagram of the wire welding pliers

Figure 8 is the total rendering the clamping part

Figure 9 is a clamping part side view (partial)

Figure 10 is partial detailed plans of the clamping part

Figure 11 tightly when the handle for the commencement of the movement of each part of the 1st schematic view

Figure 12 tightly when the handle for the commencement of the movement of each part of the 2nd schematic view

Figure 13 is the state schematic view of the handle completely tightly held

Figure 14 is a heating plate 1st chart with the cooling fan

Figure 15 is connected with the cooling fan for heating 2nd chart

Figure 16 is the schematic view of the steps of placing the wire

Figure 17 is the schematic view of the clamping wire steps

Figure 18 is the schematic view of conversion heating radiating mode step

Figure 19 is the schematic view of splicing wire end step

Figure 20 is the schematic view of the cooling wire steps

Figure 21 is the schematic view of cut drum fusion connection point step

Figure 22 is a schematic view of the utility model splicing process

1. Nozzle 1; 2. The nozzle 2; 3. Color 1 wire; 4. Color 2 wire; 5. X-axis guide rail; 6. Prints color 1; 7. Prints color 2; 8. The printing platform; 9. A single-nozzle; 10. On the heating block; 11. The lower heating block; 12. The semicircular slot; 13. The circular hole; 14. The clamping part; 15. Heating plate; 16. Cooling fan; 17. A direction viewing; 18. B direction viewing; 19. 1st handle; 20. 2nd handle; 23. A bottom plate; 24. 1st spring; 25. 2nd spring; 26. 3rd spring; 27. The hinge point; 28. Inductor patterns; 29. Restraint protrusion; 30. 1st canada holds the block; 31. The left 2nd clamping block; 32. The semi-circular groove; 33. Taper-like projection of the edge of the; 34. 3rd heating holding block; 35. 4th canada holds the block; 36. L-shaped connecting rod; 37. The cylinder; 38. 1st wire; 39. 2nd wire; 40. Drum fusion connection point; 41. The power supply part; 42. Constant temperature circuit control part; 43. Display screen; 44. The temperature adjusting knob; 45. Wire welding pliers.

Mode of execution

In connection with the implementation of the examples below, to the technical scheme of the further description.

1. as shown in Figure 6, the invention is divided into the power supply part 41, constant temperature circuit control part 42, wire welds the pliers part 45 a, the following are the details of:

The power supply part 41: power supply can be directly inserted into the household 220V common voltage, through a self-contained adapter voltage stability to 24V, a total of constant temperature circuit control and wire welds the pliers part to use.

Constant temperature circuit control part 42: this part is mainly a a circuit control board, which have two major functions, 1st, through the control panel and a temperature adjusting knob 44 can be from 0 - 300 °C accurate control wire welding caliper heating temperature of the heat source, in addition to time in display screen 43 is displayed on the display temperature; 2nd, circuit control panel through the conversion can be accurately transformed into electric energy corresponding to the temperature of the heat source.

Wire welds the pliers part 45:

As shown in Figure 7 for the wire welds the pliers part general map, by the clamping part, heating plate 15 and a cooling fan 16 a. Next we from B A direction or direction of each part of the detailed structure and work process.

As shown in Figure 8, wire welding pliers 45 comprises a bottom plate 23, heating plate 15, the cooling fan 16, the handle 1st 19, 2nd handle 20, 1st clamping block 30, 2nd clamping block 31, 3rd clamping block 34, 4th clamping block 35, 1st spring 24, 2nd spring 25 and 3rd spring 26; the handle 1st 19 and 2nd handle 20 in the hinge point 27 are mutually hinged and at point 27 is fixed on the bottom plate 23 on; the handle 1st 19 and 2nd handle 20 is connected between the spring 1st 24, 1st spring 24 is always under the compressed state, the elastic force of the handle so that the role of the 1st 19 with the 2nd handle 20 is provided with an outward open trend; two handles all close to the hinge is provided with a long through hole 28, the bottom plate 23 of the two constraints on projection 29 passes through the two casings of the hole, to restrain the handle 19 of the rotation range, and the through hole is slightly larger than the inner diameter of the bottom plate 23 of the bound on the outer diameter of the cylindrical projection; the handle 1st 19 of the clamp is fixedly connected at the 4th clamping block 35, 2nd handle 20 of the clamp at the clamping block is fixedly connected with a 2nd 31; 1st clamping block 30 and 2nd clamping block 31 near the bottom plate 23 relative to the side edge of the articulated with each other, so that the two clamping block can be around the joint the side edge of the rotated to a certain angle, 3rd clamping block 34 and 4th clamping block 35 near the bottom plate 23 relative to the side edge of the articulated with each other, so that the two clamping block can be around the joint the side edge of the rotated by a certain angle;

As shown in Figure 9, Figure 10 shown, the bottom plate 23 close to the 1st clamping block 30 and 3rd clamping block 34 is arranged at one end of the two symmetrical convex, the bottom plate 23 is provided with projections between the U-shaped opening is provided with a, and the two protruding through the cylinder connected between; 1st clamping block 30 and its opposite convex connected between the 2nd spring 25, 3rd clamping block 34 and its opposite convex connected between the 3rd spring 26, the spring and the 2nd 3rd spring is completely the same, and are always in a state of compression, 2nd spring 25 will be 1st canada holds the block 30 pressed on the 2nd clamping block 31 on, under the natural state, 2nd spring 25 compression is relatively small, allows the manual will be 1st canada holds the block 30 and 2nd clamping block 34 is opened and a small angle; the same 3rd spring 26 will be 3rd heating holding block 34 is pressed against the 4th canada holds the block 35 on, under the natural state, 3rd spring 26 compression is relatively small, allows the manual will be 3rd heating holding blocks 34 and 4th canada holds the block 35 break a small angle; in 1st clamping block 30 and 2nd clamping block 31 two two opposite surface, 3rd clamping block 34 and 4th clamping block 35 two opposite the same is arranged on the surface of the semicircular groove 32, so that the clamping block two jointed to form a circular through hole, the axis of the through hole with the side edge of the clamping block are connected to each other are parallel to each other;

As shown in Figure 16, as shown, in the natural state of the manual break canada holds the block 1st 30 and 2nd clamping block 31, 3rd heating holding blocks 34 and 4th canada holds the block 35, the two different wire: 1st wire 38 and 2nd wire 39 respectively put into the two through holes, the inner diameter of the through hole equal to the outer diameter of the wire;

As shown in Figure 11, Figure 12 shown, grasping the handle, 1st canada holds the block 30 and 2nd clamping block 31 formed of integral to the central close to and at the same time upward a little displacement, so that the 2nd spring 25 further compression, increased elasticity, can make the 1st canada holds the block 30 and 2nd clamping block 31 clamping its of the round holes 1st wire 38, the same when grasping the handle, 3rd heating holding blocks 34 and 4th canada holds the block 35 formed of integral to the central close to and at the same time upward a little displacement, so that the 3rd spring 26 further compression, increased elasticity, can make the 3rd heating holding blocks 34 and 4th canada holds the block 35 clamping its of the round holes 2nd wire, when the two contact heating the end of the wire 15, the wire contact heating plate 15 and the end of the melt;

As shown in Figure 14, L-shaped connecting rod is then adjusted, heating plate 15 to far away from, the cooling fan 16 close to the wire, and the two wire rods to the central close to continue, then the two wire rods of the contact on the end of the melt, and are bonded together, form the drum fusion connection point 40 through the cooling fan 16 cooling, the drum fusion connection point 40 cooling harden; in the 2nd clamping block 31 and 4th clamping block 35 on the side opposite to, 1st clamping block 30 and 3rd clamping block 34 is arranged on the opposite side of the identical semi-circular tapered bulge, so that the 1st clamping block 30 and 2nd clamping block 31 are jointed with each other, 3rd clamping block 34 and 4th clamping block 35 are jointed with each other to form a conical projection of the edge of the 33; drum fusion connection point after cooling, wire will not be able to re-to the central mobile, the 1st and 2nd canada holds the block clamping block overall, with heating block at the 3rd and 4th clamping block of the whole, the central to continue to close, the wire can only be in the round hole in the short distance of the sliding state), close in the process, the conical projection on the canada holds the blockshape cutting edge 33 on the full contact, as shown in Figure 13, the drum fusion connection point 40 at the surplus material removal, so that the welded joint is the inner diameter of the wire of the inner diameter of the other parts of the line.

The specific process of the present invention are as follows:

Step one: placing wire, as shown in Figure 15, in the clamping part of the natural relaxed state, and the heating plate 15 is located in the middle of the two cone projection shape cutting edge, two wire: 1st wire 38 and 2nd wire 39 are respectively inserted into the two clamping block in, and to make the two wire of the basic contact on the end part of the sheet, but not press too tight;

Step two: clamping wire, as shown in Figure 17, the beginning of the handle tightly, in the 2nd spring 25 and 3rd spring 26 under the action of the elastic force, 1st canada holds the block 30 and 2nd clamping block 31 clamping 1st wire 38, 3rd heating holding blocks 34 and 4th canada holds the block 35 clamping 2nd wire 39, at the same time as the two heating block also to the central close, all two wire end fully pressing the heating plate 15 on the;

Step three: heating wire, in the thermostatic circuit control part 42 in the switch to start the heating, heating plate 15 rapidly raising the temperature to the designated temperature, the two wire rods with the heating plate 15 is in contact with the end of the melt rapidly;

Step four: conversion heating radiating mode, as shown in Figure 18, L-shaped connecting rod manual moving 36, make it around the cylinder 37 rotary, heating plate 15 away from the wire fusion, the heat dissipating fan 16 close to the wire welding point, at the same time turn off the heating switch;

Step five: splicing wire end, as shown in Figure 19, continue to firmly grasp the handle, two groups of clamping block to continue to close to the center, and in this process the wire in has been pressed, step is melted in the two ends of the contact on the beginning, because the molten wire of the viscosity function, and the two wire rods are bonded together at the ends, and in the joint of the form a drum fusion connection point 40;

Step six: cooling wire, as shown in Figure 20, in the constant temperature circuit control part is started and the heat radiation fan switch, the heat dissipation fan quickly and the two wire rods of the weld point cooling to room temperature, the last step of drum fusion hardening;

Step seven: cut drum fusion connection point 40, as shown in Figure 21, with wire cooling to room temperature, to continue to firmly grasp the handle, two groups of clamping block to continue to phase the central close, two conical projection shape cutting edge 33 have also begun to central close, in this process, the wire clamping block in the circular hole 13 is in the sliding state, until the two conical projection shape cutting edge 33 and pressing contact on the, drum fusion connection point 40 at the surplus material is completely conical projection shape cutting edge cutting removing, the original drum fusion connection point 40 into the diameter change with other parts of the same wire diameter;

Step eight: taking out the wire, fully released handle, canada holds the block open, may be spliced wire integrally taken out, cutting off the power supply, finishes the 3D printing wire splice.

In order to 3D printing commonly used material PLA as an example, the details of the invention splicing two different 1.75 mm diameter process of PLA.

PLA and the melting temperature is 200 - 220 °C, in 210 °C at about the maximum bonding strength. canada holds the block (30, 31, 34 and 35) on the radius of the slot are 0.875 mm, thus split to obtain 1.75 mm diameter of the circular hole 13.

At the commencement of operation of the following six steps:

Step one: placing wire, as shown in Figure 16, the clamping part in the natural relaxed state, and the heating plate 15 is located in the middle of the two cone projection shape cutting edge, the two different color of wire are respectively inserted into the PLA canada holds the block in two groups, and the two poles of the end part of the wire of the basic being intimate heating sheet, but not press too tight;

Step two: clamping wire, as shown in Figure 17, the beginning of the handle tightly, in the 2nd spring 25 and 3rd spring 26 under the action of the elastic force, 1st canada holds the block 30 and 2nd clamping block 31 clamping 1st wire 38, 3rd heating holding blocks 34 and 4th canada holds the block 35 clamping 2nd wire 39, at the same time as the two heating block also to the central close, all two wire end fully pressing the heating plate 15 on the;

Step three: heating wire, in the thermostatic circuit control part 42 in the switch to start the heating, heating plate 15 rapidly raising the temperature to the designated temperature 210 °C, two wire and the heating plate 15 is in contact with the end of the melt rapidly;

Step four: conversion heating radiating mode, as shown in Figure 18, L-shaped connecting rod manual moving 36, make it around the cylinder 37 rotary, heating plate 15 away from the wire fusion, the heat dissipating fan 16 close to the wire welding point, at the same time turn off the heating switch;

Step five: splicing wire end, as shown in Figure 19, continue to firmly grasp the handle, two groups of clamping block to continue to close to the center, and in this process the wire in has been pressed, step is melted in the two ends of the contact on the beginning, because the molten wire of the viscosity function, and the two wire rods are bonded together at the ends, and in the joint of the form a drum fusion connection point 40;

Step six: cooling wire, as shown in Figure 20, in the constant temperature circuit control part is started and the heat radiation fan switch, the heat dissipation fan quickly and the two wire rods of the weld point cooling to room temperature, the last step of drum fusion hardening;

Step seven: cut drum fusion connection point 40, as shown in Figure 21, with wire cooling to room temperature, to continue to firmly grasp the handle, two groups of clamping block to continue to phase the central close, two conical projection shape cutting edge 33 have also begun to central close, in this process, the wire clamping block in the circular hole 13 is in the sliding state, until the two conical projection shape cutting edge 33 and pressing contact on the, drum fusion connection point 40 at the surplus material is completely conical projection shape cutting edge cutting removing, the original drum fusion connection point 40 into the diameter change with other parts of the same wire diameter;

Step eight: taking out the wire, fully released handle, canada holds the block open, may be spliced wire integrally taken out, cutting off the power supply, finishes the 3D printing wire splice.