CN205202209U - 3D printing device - Google Patents

Abstract

The utility model discloses a 3D printing device, which includes a main frame, a discharge printing head, a forming printing table, and a print head displacement adjustment mechanism for driving the discharge print head to change the position of the discharge print head. The discharge print head is provided with a print head feed end for inputting printing materials, the discharge print head is provided with a discharge channel connected with the print head feed end, and the forming print table includes a fixed plate, At least one movable platen that can move up and down corresponds to the movable platen one by one and is used to drive the platen displacement adjustment mechanism to move the movable platen up and down. The beneficial effects of the utility model are: the structure is reasonable, it can be adjusted according to the support demand, and a part of the original support (non-printing support) can be flexibly provided, thereby reducing the demand for the original printing support, improving the printing efficiency, and reducing the risk of partial collapse of the product , Save support materials, and can ensure the stability of the product during the printing process.

Description

A 3D printing device

technical field

The utility model belongs to the technical field of 3D printing, in particular to a 3D printing device.

Background technique

3D printer, also known as three-dimensional printer (3DP), is a machine that uses cumulative manufacturing technology, that is, rapid prototyping technology. 3D printing technology is a digital model file-based technology that uses bondable materials such as molten plastic to manufacture three-dimensional objects by printing layers of adhesive materials, that is, the technology of constructing objects by layer-by-layer printing. At this stage, 3D printers are mostly used to manufacture products.

The 3D printer mainly includes a printing structure (print head), a forming printing table (on which the product is formed), and a printing head displacement adjustment mechanism (which can change the position of the printing head in space, so that the printed raw materials can fall on the forming printing table different positions to achieve three-dimensional molding of the product). When a 3D printing device prints a product, it is often necessary to print a "support". For example, if a part of a product is suspended, the suspended part obviously cannot be directly printed and finalized. It is necessary to print a "support" under the suspended part first. The suspended part is then printed on the support, and the "support" is removed after the product is formed. The "support" can be made of easy-to-detach materials, or it can be made into a hollow structure, which is convenient for subsequent separation and removal. However, every time a "support" is printed, more materials and printing time will be consumed, and the carrying capacity of the "support" is also limited (to ensure that the "support" is easy to separate and remove), if the support is high and large, it is easy to cause The product is partially collapsed or even damaged. However, the current 3D printing equipment is still lacking in terms of saving the volume and quantity of "supports", improving printing efficiency and printing process stability.

Utility model content

In order to overcome the deficiencies in the prior art, the utility model provides a reasonable structure, which can flexibly provide a part of the original support, reduce the demand for printing support, improve printing efficiency, reduce the risk of partial product collapse, and save support materials. A 3D printing device that can ensure good product stability during the printing process.

In order to achieve the above object, the utility model adopts the following technical solutions:

A 3D printing device, including a main frame, a discharge print head, a forming print table, and a print head displacement adjustment mechanism for driving the discharge print head to change the position of the discharge print head, the discharge print head There is a print head feed end for inputting printing materials on the top, a discharge channel connected with the print head feed end is provided inside the discharge print head, and the forming printing table includes a fixed plate, at least one can move up and down The movable platen corresponds to the movable platen one by one and is used to drive the platen displacement adjustment mechanism to move the movable platen up and down. The discharge printing head is used to output printing materials (such as molten plastic) to the forming printing table, and the printing head displacement adjustment mechanism is used to adjust the relative position between the discharging printing head and the forming printing table (the discharge direction of the discharging printing head is always toward Next, what changes is the horizontal position and height). The forming printing table includes a fixed platen and at least one movable platen, the position of the fixed platen will not change, and the movable platen can be adjusted up and down. In this way, when printing starts, when a certain part needs to print "support", the movable platen at the corresponding position of this part can be raised, so that all or part of the "support" originally required at that place can be saved, saving printing time, "Support" raw materials, and after reducing the "support", it also improves the overall load-bearing capacity, which helps to improve the stability of the formed product and the entire structure during the printing process.

As a preference, the discharge channel is vertical and cylindrical, the discharge print head is arranged on a print head stand, and the print head displacement adjustment mechanism is a parallel mechanism, which includes three parallel branch chains, parallel The branch chain includes two adjusting rods and a driving block that can move up and down. The driving block in the same parallel branch chain is spherically hinged with the upper end of the adjusting rod, and the lower end of each adjusting rod is spherically hinged with the print head stand. Three parallel The branch chains are evenly distributed along the circumference of the discharge channel. "Spherical hinge", also known as "spherical hinge", "spherical hinge". This scheme provides a form of a three-degree-of-freedom parallel mechanism. Through the up and down movement of each driving block, the angle and height of each adjustment rod are changed to drive the print head stand and the discharge print head to move horizontally. movement and movement in the height direction.

Preferably, the parallel branch chain also includes a branch chain motor, a vertical guide rod, and a transmission mechanism. The transmission mechanism includes a driving wheel, a driven wheel, and a transmission belt that bypasses the driving wheel and the driven wheel. The transmission belt is closed at the first position, and the same parallel branch chain middle:

The rotating power of the driving wheel comes from the branch chain motor, the sliding connection between the driving block and the vertical guide rod, the sliding direction of the driving block is vertical, and the driving block is provided with fixed holes and live holes, and the fixed holes and live holes run through the driving block On the upper and lower surfaces, the transmission belt passes through the fixed hole and the live hole, and the part of the transmission belt in the fixed hole is fixedly connected with the driving block. The branch chain motor drives the transmission belt to rotate through the driving wheel, and the driven wheel plays the role of positioning and cooperating with tensioning the transmission belt. The driving belt can move up and down with the driving block. When the driving block moves up and down, the relative position between the part of the driving belt in the fixed hole and the driving block remains unchanged, while the part of the driving belt in the living hole and the driving block There is relative movement between them.

Preferably, the platen displacement adjustment mechanism includes an air cylinder/oil cylinder. In the corresponding moving platen and platen displacement adjustment mechanism: the piston rod of the air cylinder/oil cylinder is connected to the lower end of the movable platen, and the piston rod of the air cylinder/oil cylinder The retractable direction is vertical.

Preferably, the platen displacement adjustment mechanism includes a servo cylinder/servo oil cylinder. In the corresponding moving platen and platen displacement adjustment mechanism: the piston rod of the servo cylinder/servo oil cylinder is connected to the lower end of the movable platen, and the servo cylinder/servo cylinder The retractable direction of the piston rod of the servo cylinder is vertical. Whether it is an air cylinder/oil cylinder, servo cylinder/servo oil cylinder, as long as the height adjustment of the movable platen can be realized, any other commonly used adjustment mechanism, such as a screw mechanism, can also be used.

Preferably, it also includes a color-adding ring tube, the color-adding ring tube is set outside the discharge print head and coaxial with the discharge channel, the color-adding ring tube is provided with a plurality of coloring tubes, and the inlet of the coloring tube is connected to the color-adding ring tube , the outlet of the coloring tube is connected to the discharge channel, and the coloring tubes are evenly distributed along the circumference of the discharge channel, and the color adding ring tube is connected to the paint tube through the pigment delivery pump. The pigment conveying pump transports the pigment (i.e. dyeing material, coloring material) in the pigment cylinder to the color adding ring tube, and the color adding ring tube feeds the pigment into the discharge channel through each coloring tube, so that the printing materials can be colored in the discharge channel . This coloring method does not need to blend the printing materials and pigments in advance, and avoids easy deposition and stratification in the storage container of the mixed raw materials (with pigments) after the printing materials and pigments are mixed (pigments and printing materials are heavy and frivolous) ), resulting in poor uniformity of mixed raw materials during subsequent printing. Moreover, the raw materials for 3D printing are not necessarily molten raw materials (molten plastic, etc.), but can also be solid strip-shaped materials (the solid strip-shaped materials are heated and melted after entering the discharge channel), and the coloring method of this scheme can meet the requirements of this type. Coloring of printing materials.

As a preference, a heat-insulating cylinder coaxial with the discharge channel is provided in the discharge channel, the upper and lower ends of the heat-insulating cylinder are open, the heat-insulating cylinder is connected to the discharge printing head through a connecting rod, and the outer wall of the heat-insulating cylinder is connected to the printing head. A thin material coloring channel is formed between the channel walls of the discharge channel, the outlet of the coloring tube faces the outer wall of the heat insulation cylinder, and a coloring one-way valve is arranged at the outlet of the coloring tube. When coloring, at least ensure that the outer surface of the final printing material (the material that is cured and finalized from the print head to the forming printing table) is fully colored (some pigments are allowed inside the final printing material, but the less the better, the higher the internal pigment content, The more it affects the strength and overall structural stability of the final printed material, the more pigment it takes). The coloring method of directly inputting the pigment into the discharge channel has many advantages, but it is still easy to consume a relatively large amount of pigment. This is because the pigment is easily mixed into the molten raw material after it enters the discharge channel and comes into contact with the relatively high-temperature molten raw material. , if the amount of pigment is insufficient, there will be problems that the surface of the final printing material is not completely colored and the degree of coloring is insufficient. In order to ensure that the surface of the final printing material is fully colored, relatively more pigments have to be input. In this way, the final printing There are still a lot of pigments mixed in the material, and there will be the above-mentioned shortcomings in the strength and overall load-bearing capacity of the final printing material. Furthermore, compared to printing materials, pigments are highly viscous, poor in fluidity, prone to thermal agglomeration, and even zooming. When there is a large amount of pigment (high content ratio) in the discharge channel, it is easy to cause blockage of the discharge print head. In this scheme, the structure of the heat insulation cylinder is adopted. After the molten printing material in the discharge channel flows from top to bottom to the heat insulation cylinder, it is temporarily divided into two parts by the heat insulation cylinder, and the printing material inside the heat insulation cylinder remains the same. Maintain a relatively high temperature, and normally flow down from the inside of the heat-insulating cylinder. The printing material outside the heat-insulating cylinder is in the thin material coloring channel, relatively thin, and will quickly and continuously contact the input pigment, and start to fully mix ( In the thin material coloring channel, the thickness of the printing material is thin, and it is easy to fully combine with the pigment), and this part of the printing material will cool down (it is best to control the temperature range slightly higher than the curing temperature), and it is not like the whole printing material is in contact with the pigment It is easy to cause the paint to melt into the interior quickly. In addition, the heat insulation cylinder also forms a blocking structure. When the pigment enters the discharge channel, it has a certain impact force (the pigment needs to be fed into the outlet). If it is directly colored, the pigment is more likely to be mixed into the printing material. The heat cylinder can ensure that the pigment will only be fully and evenly dispersed in the thin material coloring channel, and color the printing material in the thin material coloring channel, which fully saves the pigment and avoids the excessive pigment content in the final printing material.

Preferably, a metal heating block that can be heated by electricity is provided on the discharge printing head, and a part of the metal heating block extends into the discharge channel. This solution is suitable for solid raw materials, which are heated and melted after entering the discharge channel, and then printed and solidified. This solution is also applicable to the form of secondary heating, that is, in order to avoid the temperature drop too fast after the molten raw material enters the discharge channel, the metal heating block is used for secondary heating.

As a preference, the feeding end of the printing head is connected to the mixing discharge end of a mixing cylinder through a feed pump, the mixing cylinder is provided with a cylinder feeding port, and also includes several raw material cylinders for supplying materials to the cylinder feeding port The raw material cylinder is provided with a melting heater, the mixing discharge end is provided with a discharge valve, the mixing cylinder is provided with a mixing shaft driven by a mixing motor, and a number of stirring blades are provided on the mixing shaft. In the case of direct feeding of molten raw materials, the molten raw materials can be mixed materials (mixed with different materials, or mixed with pigments, etc.) in addition to a single material. Each solid single raw material is melted or melted in the raw material barrel and enters the mixing barrel. At this time, the mixing shaft can drive the agitating blades to stir to improve the uniformity of the mixture.

As preferably, the mixing cylinder is cylindrical, the mixing cylinder comprises a cylinder body, a cylinder bottom, and a cylinder top, the cylinder feeding port is arranged on the cylinder top, the mixing cylinder is arranged on a fixed cylinder frame, and the mixing cylinder and the fixed cylinder frame rotate Connection, the rotation center of the mixing cylinder is the axis of the cylinder body, and it also includes a main motor for driving the cylinder body to rotate around the axis of the cylinder body. The mixing discharge end is a discharge pipe fixed to the bottom of the cylinder and a The discharge valve on the top, the discharge pipe, the mixing cylinder and the mixing shaft are all coaxial. The feed pump is connected to the discharge pipe through the feed pipe, and the discharge pipe is connected to the feed pipe in rotation. Above, there are at least four arc plates inside the cylinder body, the outer surface of the arc plates can be attached to the inner wall surface of the cylinder body, each arc plate is evenly distributed along the circumference of the mixing axis, and the space between adjacent arc plates is for side feeding Channel, the arc plate is provided with a number of horizontal sliding rods, the horizontal sliding rods pass through the side wall of the cylinder body and are slidably connected with the cylinder body side wall, the outer end of the horizontal sliding rod is outside the cylinder body, and the outer end of the horizontal sliding rod is provided with a pressure plate, A counterweight is arranged on the pressing plate, and a plurality of returning springs are arranged between the pressing plate and the cylinder body, one end of the returning spring is connected to the pressing plate, and the other end of the returning spring is connected to the outer wall surface of the cylinder body. The fixed cylinder holder is fixed, the cylinder body can be rotated, and the mixing shaft can also be rotated. Of course, in actual operation, it is best to let the cylinder body and the mixing shaft rotate in the opposite direction. If they rotate in the same direction, the rotation speed should be different, otherwise Became "relatively static". We know that for cylindrical containers such as mixing cylinders, during the process of mixing materials, the material attached to the wall (side wall) is not easy to be stirred evenly (in practice, it is difficult for the mixing structure to adhere to the wall, because it will There are negative effects such as wall scraping and aggravated vibration, and the manufacturing precision is too high; secondly, it has a centrifugal effect during stirring, and the material with larger mass and higher viscosity in the mixture is easy to stick to the wall, so the uniformity of the mixture will still be affected. limit). Furthermore, problems such as upper and lower stratification and heavy material precipitation are prone to occur, which is also not conducive to ensuring the uniformity of the mixture. However, in this solution, there is an arc plate structure, and the outer surface of the arc plate can be attached to the inner wall surface of the cylinder body. In the non-working state, there is a margin between the arc plate and the inner wall surface of the cylinder body, and the return spring is not pulled at this time. stretch. When working (while stirring), the main motor drives the barrel to rotate. As the rotating speed of the barrel increases, under the action of centrifugal force, the distance of the counterweight moving outward becomes larger (at this time, the return spring is elongated), and the arc plate is driven closer. And gradually stick to the inner wall of the cylinder body, so that the mixture on the wall can be squeezed out to the arc plate, bottom and both sides, and return to the center of the cylinder body. And if you want the arc plate to move in again, you only need to stop the main motor, or adjust the speed (speed down), then under the return action of the return spring, the arc plate will move inward. In the actual mixing process, the agitating blades are always agitating. Under the action of the agitating blades, the internal mixture moves outward (towards the side wall of the cylinder body), and the main motor can be accelerated, decelerated, or started and stopped several times. When starting or accelerating, the arc plate pushes the mixture at the wall to extrude to the arc plate, bottom and both sides, and the mixture extruded upward is equivalent to moving from bottom to top, realizing the turning up of a part of the bottom mixture. As a result, by the way, the problem of upper and lower layering of the mixture and precipitation of heavy materials is solved, and the mixture extruded to both sides will impact the rest of the wall-adhering mixture (for example, when the arc plate is attached to the wall, the gap between adjacent arc plates The wall-adhered mixture in the space, that is, the side passage, allows the wall-adhered mixture to be mixed into the center of the barrel again and stirred again, so that the mixture can be guaranteed to have extremely high uniformity. After the mixing is completed, the mixture can be immediately Enter the output channel and print the shape, so the quality of the final printed material is also guaranteed.

The beneficial effects of the utility model are: the structure is reasonable, it can be adjusted according to the support demand, and a part of the original support (non-printing support) can be flexibly provided, thereby reducing the demand for the original printing support, improving the printing efficiency, and reducing the risk of partial collapse of the product , save support materials, and can ensure the stability of the product during the printing process; it has a coloring mechanism, which can guarantee the coloring effect and the quality of the final printing material under the premise of saving pigments, and can avoid plugging; it has a comprehensive mixing structure , when using the mixed material for printing, it can eliminate the problem of layering and deposition of the mixed material, make the printed mixed material uniform, and the quality of the final product is high.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the top view of the utility model;

Fig. 3 is a schematic structural view of a driving block of the utility model;

Fig. 4 is a horizontal sectional view of the driving block of the utility model;

Fig. 5 is a structural schematic diagram of a forming printing table of the present invention;

Fig. 6 is a top view of a forming printing table of the present invention;

Fig. 7 is a schematic diagram of another forming printing station;

Fig. 8 is a schematic diagram of another forming printing station;

Fig. 9 is a schematic structural view of the discharge printing head in Embodiment 1 of the present utility model;

Fig. 10 is a sectional view of the discharge printing head in Embodiment 1 of the present utility model;

Fig. 11 is a schematic structural view of the discharge print head in Embodiment 3 of the present utility model.

In the figure: main frame 1, discharge printing head 2, discharge channel 21, print head stand 22, metal heating block 23, forming printing table 3, fixed platen 31, moving platen 32, cylinder 321, adjustment rod 41 , driving block 42, active hole 421, vertical guide rod 43, transmission belt 44, color adding ring pipe 51, coloring tube 52, coloring one-way valve 521, paint delivery pipeline 53.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Embodiment 1: In the embodiment shown in Figures 1 to 10, a 3D printing device includes a main frame 1, a discharge printing head 2, and a forming printing table 3, and also includes a device for driving the discharge printing head to move Thereby changing the print head displacement adjustment mechanism for the position of the discharge print head, the discharge print head is provided with a print head feed end for inputting printing materials, and the discharge print head is provided with a feed end communicating with the print head feed end. The discharge channel 21, the forming printing table includes a fixed platen 31, at least one movable platen 32 that can move up and down, and a platen displacement adjustment mechanism that corresponds to the movable platen and is used to drive the movable platen to move up and down . The discharge printing head is used to output printing materials (such as molten plastic) to the forming printing table, and the printing head displacement adjustment mechanism is used to adjust the relative position between the discharging printing head and the forming printing table (the discharge direction of the discharging printing head is always toward Next, what changes is the horizontal position and height). The forming printing table includes a fixed platen and at least one movable platen, the position of the fixed platen will not change, and the movable platen can be adjusted up and down. In this way, when printing starts, when a certain part needs to print "support", the movable platen at the corresponding position of this part can be raised, so that all or part of the "support" originally required at that place can be saved, saving printing time, "Support" raw materials, and after reducing the "support", it also improves the overall load-bearing capacity, which helps to improve the stability of the formed product and the entire structure during the printing process. The structure of the forming printing table can have various changes, as shown in Fig. 7 and Fig. 8, and can be designed and selected according to actual needs.

The discharge channel is vertical and cylindrical, and the discharge print head is arranged on a print head stand 22. The print head displacement adjustment mechanism is a parallel mechanism, and the parallel mechanism includes three parallel branch chains. It includes two adjusting rods 41 and a driving block 42 that can move up and down. The driving block in the same parallel branch chain is spherically hinged with the upper end of the adjusting rod, and the lower end of each adjusting rod is spherically hinged with the print head stand. Three parallel The branch chains are evenly distributed along the circumference of the discharge channel. In the same parallel branch chain: the two adjusting rods are arranged symmetrically with reference to the driving block. "Spherical hinge", also known as "spherical hinge", "spherical hinge", the "spherical hinge" matching structure includes a ball joint and a hinge ball that cooperate with each other. The hinge ball can be directly fixed on the structure, or through the ball joint. Fixing rods are fixed to the structure. This scheme provides a form of a three-degree-of-freedom parallel mechanism. Through the up and down movement of each driving block, the angle and height of each adjustment rod are changed to drive the print head stand and the discharge print head to move horizontally. Movement and movement in the height direction (when the three driving blocks move up and down together, they can drive the discharge print head to move in the height direction). Of course, the print head displacement adjustment mechanism is not limited to one type. The three-axis coordinate system displacement adjustment mechanism commonly used in the field of 3D printing at present, or other displacement adjustment mechanisms used to drive the discharge print head to perform horizontal movement and height adjustment, are all available.

Described parallel branch chain also comprises branch chain motor, vertical guide rod 43, transmission mechanism, and transmission mechanism comprises driving wheel, driven wheel, the transmission belt 44 that bypasses driving wheel and driven wheel, and transmission belt first position is closed, and in the same parallel branch chain :

The rotational power of the drive wheel comes from the branch chain motor, the sliding connection between the driving block and the vertical guide rod, the slidable direction of the driving block is vertical, the driving block is provided with a fixed hole and a live hole 421, and the fixed hole and the live hole all run through the drive On the upper and lower surfaces of the block, the transmission belt passes through the fixed hole and the movable hole, and the part of the transmission belt in the fixed hole is fixedly connected with the driving block. The part of the transmission belt in the live hole can move up and down relative to the driving block. The branch chain motor drives the transmission belt to rotate through the driving wheel, and the driven wheel plays the role of positioning and cooperating with tensioning the transmission belt. The driving belt can move up and down with the driving block. When the driving block moves up and down, the relative position between the part of the driving belt in the fixed hole and the driving block remains unchanged, while the part of the driving belt in the living hole and the driving block There is relative movement (relative up and down movement) between them, and the branch chain motor can be a servo motor. In the same parallel branch chain: the output end of the branch chain motor is connected to the input end of a chain reducer, and the output end of the branch chain reducer is coaxially connected with the driving wheel.

The platen displacement adjustment mechanism includes a cylinder 321/oil cylinder. In the corresponding movable platen and platen displacement adjustment mechanism: the piston rod of the cylinder/oil cylinder is connected to the lower end of the movable platen, and the piston rod of the air cylinder/oil cylinder is retractable. Orientation is vertical.

It also includes a color adding ring tube 51, the color adding ring tube is set outside the discharge printing head and coaxial with the discharge channel, a plurality of coloring tubes 52 are arranged on the color adding ring tube, the coloring tube inlet is connected to the color adding ring tube, The outlet of the coloring tube is connected to the discharge channel, and the coloring tubes are evenly distributed along the circumference of the discharge channel, and the color adding ring tube is connected to the paint tube through the paint delivery pump. The paint delivery pump can be a screw pump, the outlet of the paint delivery pump is connected to the color adding ring pipe through a pigment delivery pipeline 53, and the inlet of the pigment delivery pump is connected to the paint cylinder through a pigment delivery pipeline. The pigment conveying pump transports the pigment (i.e. dyeing material, coloring material) in the pigment cylinder to the color adding ring tube, and the color adding ring tube feeds the pigment into the discharge channel through each coloring tube, so that the printing materials can be colored in the discharge channel . This coloring method does not need to blend the printing materials and pigments in advance, and avoids easy deposition and stratification in the storage container of the mixed raw materials (with pigments) after the printing materials and pigments are mixed (pigments and printing materials are heavy and frivolous) ), resulting in poor uniformity of mixed raw materials during subsequent printing. Moreover, the raw materials for 3D printing are not necessarily molten raw materials (molten plastic, etc.), but can also be solid strip-shaped materials (the solid strip-shaped materials are heated and melted after entering the discharge channel), and the coloring method of this scheme can meet the requirements of this type. Coloring of printing materials.

Embodiment 2: In this implementation, the air cylinder/oil cylinder in Embodiment 1 is replaced by a servo air cylinder/servo oil cylinder. In addition, whether it is an air cylinder/oil cylinder or a servo cylinder/servo oil cylinder, as long as the height adjustment of the movable platen can be realized, any other commonly used adjustment mechanism, such as a screw mechanism, can also be used.

Embodiment 3: the basic structure and implementation mode of this embodiment are the same as embodiment 1, and its difference is:

As shown in FIG. 11 , the discharge printing head is provided with a metal heating block 23 that can be heated by electricity, and a part of the metal heating block extends into the discharge channel. This solution is suitable for solid raw materials, which are heated and melted after entering the discharge channel, and then printed and solidified. This solution is also applicable to the form of secondary heating, that is, in order to avoid the temperature drop too fast after the molten raw material enters the discharge channel, the metal heating block is used for secondary heating.

Claims (6)

1. a 3D printing equipment, comprise mainframe, discharging printhead, shaping stamp pad, also comprise one for driving discharging printhead to move thus changing the printhead displacement governor motion of discharging print head position, it is characterized in that, described discharging printhead is provided with for inputting the printhead feed end printing raw material, the tapping channel be communicated with printhead feed end is provided with in described discharging printhead, described shaping stamp pad comprises determines platen, at least one dynamic platen moving up and down, platen displacement governor motion with dynamic platen one_to_one corresponding and for driving dynamic platen to move up and down.

2. a kind of 3D printing equipment according to claim 1, it is characterized in that, described tapping channel is vertical and cylindrical, discharging printhead is located on a printing caster bed frame, described printhead displacement governor motion is a parallel institution, parallel institution comprises three side chains in parallel, side chain in parallel comprises two adjusting rods, a band motion block moving up and down, band motion block in same side chain in parallel and globular hinge between adjusting rod upper end, globular hinge between each adjusting rod lower end and printhead stand, three side chains in parallel are uniformly distributed along the circumference of tapping channel.

3. a kind of 3D printing equipment according to claim 2, it is characterized in that, described side chain in parallel also comprises side chain motor, vertical guide bar, transmission mechanism, transmission mechanism comprises driving wheel, driven pulley, walks around the driving belt of driving wheel and driven pulley, driving belt first place is closed, in same side chain in parallel:

The rotational power of driving wheel is from side chain motor, be slidably connected between band motion block and vertical guide bar, slidably direction with motion block is vertical, band motion block is provided with determines hole, hole alive, determine hole, Kong Jun alive runs through the band upper and lower surface of motion block, driving belt is through determining hole, hole alive, and driving belt is in the part of determining in hole and is fixedly connected with between band motion block.

4. a kind of 3D printing equipment according to claim 1, it is characterized in that, described platen displacement governor motion comprises one cylinder/oil cylinder, at dynamic platen in correspondence with each other with platen displacement governor motion: the piston rod of cylinder/oil cylinder is connected dynamic platen lower end, and the scalable direction of the piston rod of cylinder/oil cylinder is vertical.

5. a kind of 3D printing equipment according to claim 1, it is characterized in that, described platen displacement governor motion comprises one servo cylinder/servo-cylinder, at dynamic platen in correspondence with each other with platen displacement governor motion: the piston rod of servo cylinder/servo-cylinder is connected dynamic platen lower end, and the scalable direction of the piston rod of servo cylinder/servo-cylinder is vertical.

6. a kind of 3D printing equipment according to claim 1 and 2, it is characterized in that, also comprise an additive color endless tube, it is outer and coaxial with tapping channel that additive color endless tube is enclosed within discharging printhead, additive color endless tube be provided with many colour tube, colour tube inlet communication additive color endless tube, colour tube outlet tapping channel, each colour tube is uniformly distributed along tapping channel circumference, and described additive color endless tube is switched to pigment cylinder by pigment delivery pump.