CN210617302U - Rapid forming device and rapid forming system for ultrahigh molecular weight polymer - Google Patents

Abstract

The utility model discloses a rapid forming device and a rapid forming system for ultra-high molecular weight polymer, which comprises a storage bin, wherein a cavity for containing the ultra-high molecular weight polymer is arranged inside the storage bin; the feeding rod is matched with the storage bin and reciprocates in the storage bin along the axial direction of the feeding rod; one end of the feeding rod faces to one side of the spray head, and the ultra-high molecular weight polymer in the storage bin is extruded out of the spray head; the heating module is used for forming a heating area with gradually increasing temperature from the top of the storage bin to one side of the bottom spray head; the auxiliary heating device is used for carrying out secondary heating on the ultrahigh molecular weight polymer extruded by the spray head; and the rolling assembly is used for compacting the ultrahigh molecular weight polymer extruded by the spray head. The utility model provides a quick forming device and quick forming system of ultra high molecular weight polymer heats ultra high molecular weight polymer to molten state and extrusion moulding, and it is big to have the interval span of adaptation temperature, and environmental suitability is strong.

Description

Rapid forming device and rapid forming system for ultrahigh molecular weight polymer

Technical Field

The utility model belongs to the technical field of the macromolecular material shaping, specifically speaking relates to a quick forming device and quick forming system of ultra high molecular weight polymer.

Background

3D printing is a popular concept, one of the rapid prototyping technologies, generated in the late 80 s of the 20 th century. The technology integrates multiple technologies such as mechanical engineering, material engineering, numerical control technology, laser technology and the like, and a part prototype is manufactured by adopting a material accumulation method. The principle is that firstly, modeling is carried out through Computer Aided Design (CAD) or computer animation modeling software to form a digital model, then the three-dimensional model is decomposed into two-dimensional cross sections layer by layer, and printing materials are piled up and solidified layer by layer through the software and a numerical control system to manufacture a solid product. Methods that have been used to compare mainstream include Stereolithography (SLA), Layered Object Manufacturing (LOM), Selective Laser Sintering (LS), Fused Deposition Modeling (FDM), and the like. Compared with the traditional manufacturing method, the 3D printing technology can ignore the appearance complexity of the product part; the manufacturing is quick, the product design and the die production can be synchronously carried out, the research and development efficiency is improved, and the design period is shortened; the utilization rate of raw materials is extremely high and is close to 100 percent. Based on the advantages, the technology is increasingly widely applied to industries such as automobiles, household appliances, communication, aviation, industrial modeling, medical treatment, archaeology and the like.

The materials used for 3D printing are from plastic materials such as photosensitive resin, ABS-like, wax pattern, glass fiber and the like to metal materials such as stainless steel, aluminum alloy, iron-nickel alloy, cobalt-chromium-molybdenum alloy and the like, the types of the materials are abundant in the past, but the materials are still different from the materials used in the traditional manufacturing process, and as a new generation of engineering plastics, the ultrahigh molecular weight polymer has a plurality of excellent performances such as high specific strength, good toughness, wear resistance, corrosion resistance, low temperature resistance, stress cracking resistance, impact resistance, adhesion resistance, self-lubrication and the like, so the ultrahigh molecular weight polymer plays an increasingly important role in the aspects of industrial and agricultural production, medicine, national defense construction and the like. However, such materials have extremely high molecular weights, and very long, entangled molecular chains, a melt in a highly elastic state with a melt index of approximately zero; the molding temperature range is narrow, and the oxidation and degradation are easy; the critical shear rate is low, and the friction coefficient is small, so that the forming processing is difficult.

In recent years, the laser technology has the advantages of high precision, high speed, short period, no need of a die and the like, so the application of the laser technology in the field of material processing, particularly in the rapid molding of high polymer materials, is rapidly developed, but in practical application and research, the following problems exist in the laser rapid molding of ultrahigh molecular weight polymers:

the first, ultra-high molecular weight polymer is in a discrete packed powder state prior to molding, with a large number of voids between the powder particles. Since air is a poor conductor of heat, it can interfere with the conduction of heat during the molding process. In addition, the fluidity of the polymer in a molten state is extremely poor, the change of relative positions among particles is small, a large number of air holes exist in the formed part, the density is low, and the forming quality is seriously influenced.

Secondly, the processing temperature range of the ultra-high molecular weight polymer is narrow, and the ultra-high molecular weight polymer is more sensitive to laser energy density and sintering position temperature. When the laser energy density is high, the temperature of the sintering position is too high, so that the polymer is oxidized and decomposed, and a chain scission reaction is generated to form double bonds, free radicals and the like. The cleavage of the molecular bond leads to a reduction in the properties of the shaped parts. Meanwhile, the molecular chain is also closely related to the crystallinity, which affects the rigidity, tensile strength, hardness, heat resistance, solvent resistance, air tightness, chemical corrosion resistance and the like of the product, and sometimes even directly results in the waste of the formed part.

Chinese patent application No. CN201410181568.8 discloses a high molecular material ultraviolet laser 3D printing method and device for precise temperature control. The device comprises: the device comprises a thermostat, a laser head, a non-contact temperature monitoring device, a scanning galvanometer, a processing platform, a powder laying device, a processing material and a computer control system. The laser head adopts a double-tube-core structure, the inner tube and the outer tube are coaxially fixed, one or more gradually-changed neutral filters are fixed between the two tubes, and the laser transmittance of the filters is reduced from the inner tube to the appearance in the radial direction.

Chinese patent with application number cn201510428966.x discloses a device and method for realizing laser rapid prototyping of ultra-high molecular weight polymers, and the device comprises: a laser emitting end for emitting a laser beam for irradiating and melting the ultra-high molecular weight polymer powder; the compression roller is used for compacting the ultrahigh molecular weight polymer at the laser beam sintering position; the infrared thermometer is used for monitoring the temperature change of the sintering position; the signal processing device is used for feeding back a process parameter adjusting signal to the main control system according to the temperature signal; and the main control system controls the laser emitting end and the press roller according to the technological parameter adjusting signal.

Although the prior art provides a method for rapidly forming an ultrahigh molecular weight polymer, many problems still exist in practical application, for example, the prior art adopts a laser sintering powder bed mode to achieve rapid forming of the ultrahigh molecular weight polymer, the laser of the method can only provide a temperature difference of 20-30 degrees, a material with a large span temperature difference cannot be printed, excessive materials are wasted in a powder paving mode, and in most cases, new and old powder are mixed for use, so that the quality of a formed workpiece is affected.

Therefore, the defects and shortcomings of the prior art need to be improved, and a rapid forming device and a rapid forming system for an ultra-high molecular weight polymer are provided, the ultra-high molecular weight polymer is heated to a molten state and is extruded and formed by adopting a high-temperature melting mode, so that the rapid forming device and the rapid forming system have the characteristics of large adaptive temperature interval span, strong environmental adaptability, material saving, flexible and changeable printing and forming structure and the like, in addition, the problem that the ultra-high molecular weight polymer in the molten state expands and deforms and cannot be extruded is avoided by arranging a heating region with gradient change, and the problems that the extruded ultra-high molecular weight polymer has large heat loss, poor adhesion and poor forming quality are avoided by additionally arranging laser auxiliary heating; and through adding the rolling assembly, roll the ultra-high molecular weight polymer and compact, avoided the poor problem of ultra-high molecular weight polymer viscidity, cohesiveness is not strong between the layer.

In view of this, the present invention is provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the present invention is to overcome the deficiencies of the prior art, and to provide a rapid prototyping apparatus for ultra-high molecular weight polymer, which can overcome the above problems or at least partially solve the above problems.

Another object of the present invention is to provide a rapid prototyping system of ultra-high molecular weight polymer.

In order to solve the technical problem, the utility model adopts the following basic concept: a rapid prototyping device of ultra-high molecular weight polymer comprises

The bin is internally provided with a chamber for containing the ultra-high molecular weight polymer;

the feeding rod is matched with the storage bin and reciprocates in the storage bin along the axial direction of the feeding rod;

one end of the feeding rod faces to one side of the spray head, and the ultra-high molecular weight polymer in the storage bin is extruded out of the spray head;

the heating module is used for forming a heating area with gradually increasing temperature from the top of the storage bin to one side of the bottom spray head;

the auxiliary heating device is used for carrying out secondary heating on the ultrahigh molecular weight polymer extruded by the spray head;

and the rolling assembly is used for compacting the ultrahigh molecular weight polymer extruded by the spray head.

The heating area is at least divided into a first heating area, a second heating area and a third heating area from the top to one side of the bottom of the storage bin in sequence;

the heating temperatures of the first heating area, the second heating area and the third heating area are sequentially increased;

in one embodiment, the heating of the ultra-high molecular weight polymer in any of the first heating zone, the second heating zone, and the third heating zone is uniform heating;

in one embodiment, within the third heating zone, the ultra-high molecular weight polymer is in a molten state;

in one embodiment, the ratio of the heating range of the primary heating zone to the sum of the heating ranges of the secondary heating zone and the tertiary heating zone is between 1:3 and 1: 1;

in one embodiment, the heating range ratio of the secondary heating zone and the tertiary heating zone is between 1:5 and 1: 1;

in one embodiment, the heating temperature of the heating module is between 100 ℃ and 450 ℃;

in one embodiment, the heating module is a heating wire;

in one embodiment, the heating module further comprises a temperature detection device arranged in the third heating area of the heating module and used for detecting the temperature of the heating module;

in one embodiment, the heating of the spray head is achieved by heat transfer from the heating module or a heating device provided in the spray head.

In addition, the auxiliary heating device realizes secondary heating of the ultra-high molecular weight polymer extruded by the spray head in a laser emitting mode;

in one embodiment, the laser emitted by the auxiliary heating device is an annular hollow beam;

the annular hollow light beam emitted by the auxiliary heating device can be emitted to the position of the ultrahigh molecular weight polymer extruded by the spray head;

in one embodiment, the hollow portion of the annular hollow beam is no smaller than the diameter of the ultra-high molecular weight polymer extruded by the nozzle.

Meanwhile, the rolling assembly comprises

The compression roller is used for compacting the ultrahigh molecular weight polymer by rolling on the surface of the ultrahigh molecular weight polymer extruded by the spray head;

the fixing seat is used for realizing the fixation of the compression roller;

in one embodiment, the holder is movable in the height direction of the magazine.

The bin is of a hollow structure, and the hollow structure forms a cavity for containing the ultrahigh molecular weight polymer;

the feeding rod is of a rod-shaped structure and is matched with the hollow structure of the storage bin;

the spray head is arranged at the bottom of the hollow structure;

the heating module is annularly arranged outside the storage bin;

in one embodiment, the feeder rod is a plunger rod-like structure or a threaded rod-like structure.

In addition, the storage bin comprises a first annular part and a second annular part sleeved outside the first annular part;

a gap between the first annular portion and the second annular portion forms a chamber for containing an ultra-high molecular weight polymer;

in one embodiment, the feed rod is a rod-like structure that matches the shape of the gap between the first annular portion and the second annular portion;

the spray head is connected with the second annular part;

the heating module is arranged inside the first annular part of the storage bin;

in one embodiment, the feeder rod is a plunger rod-like structure or a threaded rod-like structure.

A rapid prototyping system of ultra-high molecular weight polymer comprises

The rapid prototyping apparatus of any of the above-mentioned ultra-high molecular weight polymers;

the workbench is used for containing the ultrahigh molecular weight polymer extruded by the rapid prototyping device;

the transmission system drives the rapid prototyping device and the workbench to move in a three-dimensional space;

and the control system is respectively connected with the rapid forming device, the workbench and the transmission system and stores the three-dimensional shape information of the formed workpiece.

The control method of the rapid molding system for the ultrahigh molecular weight polymer comprises the following steps

Step 101, filling an ultra-high molecular weight polymer into a bin of the rapid prototyping device, placing the rapid prototyping device at a working position, and connecting the rapid prototyping device with the transmission system;

102, selecting a required forming workpiece in the control system and setting printing parameters;

103, slicing the three-dimensional body of the workpiece to be formed through the control system, converting the three-dimensional body into two-dimensional layered cross section information, and obtaining a motion track scanned layer by layer along the height direction;

104, starting a heating module of the rapid prototyping device, detecting the temperature of the heating module in real time by a temperature detection device, and transmitting data to the control system;

105, when the temperature of the heating module reaches a preset temperature, the control system transmits the motion track of the two-dimensional layered cross section of the formed workpiece to the transmission system, and the transmission system moves the rapid forming device to an initial position;

106, moving a feeding rod from the top to the bottom of the storage bin to push the ultra-high molecular weight polymer in the storage bin, and extruding the molten ultra-high molecular weight polymer from a spray head;

step 1061, starting an auxiliary heating device by the control system, and carrying out secondary heating on the ultrahigh molecular weight polymer extruded by the nozzle by the auxiliary heating device;

step 107, the transmission system finishes printing the layers according to the motion trail of the two-dimensional layered cross section of the formed workpiece;

step 1071, the rolling assembly compacts the ultra-high molecular weight polymer extruded by the nozzle along with the movement of the rapid prototyping device;

step 108, after printing the current layer, the transmission system moves the rapid prototyping device to the initial position, and moves the rapid prototyping device or the workbench to the next layer along the height direction;

step 109, repeating the steps 106 to 108 until the integral printing of the formed workpiece is finished;

step 110: and taking out the workpiece to obtain a final formed workpiece.

Wherein, in step 104,

the heating module 5 is provided with a heating area outside the bin 2 of the rapid prototyping device 1;

the heating areas are at least divided into a first heating area 501, a second heating area 502 and a third heating area 503 from the top to the bottom of the silo 2;

the heating temperatures of the first heating zone 501, the second heating zone 502 and the third heating zone 503 are sequentially increased;

in one embodiment, the heating of the ultra high molecular weight polymer in any of the first heating zone 501, the second heating zone 502, and the third heating zone 503 is a uniform heating;

in one embodiment, within the third heating zone 503, the ultra-high molecular weight polymer is in a molten state;

in one embodiment, the heating module 5 is a heating wire;

in one embodiment, the predetermined temperature range in step 105 is between 100 ℃ and 450 ℃;

in one embodiment, step 104 further comprises

Step 1041, heating the working table 9 until a set temperature is reached;

in one embodiment, the set temperature of the work table 9 is 20 ℃ to 200 ℃;

in one embodiment, the ultra-high molecular weight polymer is one or a combination of wires, powder and granules.

In addition, in step 1061, the process,

the laser emitted by the auxiliary heating device is an annular hollow light beam;

the annular hollow light beam emitted by the auxiliary heating device can be emitted to the position of the ultrahigh molecular weight polymer extruded by the spray head;

in one embodiment, the hollow part of the annular hollow light beam is not smaller than the diameter of the ultra-high molecular weight polymer extruded by the corresponding spray head;

in one embodiment, in step 1071, the roll-on-roll assembly comprises

The compression roller is used for compacting the ultrahigh molecular weight polymer by rolling on the surface of the ultrahigh molecular weight polymer extruded by the spray head;

the fixing seat is used for realizing the fixation of the compression roller;

in one embodiment, the holder is movable in the height direction of the magazine.

Meanwhile, step 108 further comprises

Step 1081, at least two rapid prototyping devices for containing the ultra-high molecular weight polymer;

after the ultra-high molecular weight polymer in one of the rapid prototyping devices is completely consumed, the control system starts other rapid prototyping devices which still contain the ultra-high molecular weight polymer, and jumps back to step 104 to start execution;

in one embodiment, during the rapid prototyping device switching process of step 1081, each of the rapid prototyping devices has at least two modes of height displacement and horizontal displacement;

the rapid forming device after the ultra-high molecular weight polymer is completely consumed performs height displacement firstly and then performs horizontal displacement, so that the rapid forming device is separated from the working position;

the rapid prototyping device containing the ultra-high molecular weight polymer performs horizontal displacement first, and performs height displacement after reaching the working position.

After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has: the utility model provides a rapid prototyping device and application method of ultra-high molecular weight polymer adopts the mode of high temperature melting, heats the ultra-high molecular weight polymer to the molten state and extrusion molding, has the characteristics of large span of adaptive temperature interval, strong adaptability to environment, material saving, flexible and changeable printing molding structure, and the like, and in addition, through setting up a heating area with gradient change, the problem that the ultra-high molecular weight polymer in the molten state expands and deforms and can not be extruded is avoided, and simultaneously through adding laser auxiliary heating, the problems that the extruded ultra-high molecular weight polymer has large heat loss, poor adhesion and poor molding quality are avoided; and through adding the rolling assembly, roll the ultra-high molecular weight polymer and compact, avoided the poor problem of ultra-high molecular weight polymer viscidity, cohesiveness is not strong between the layer.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the drawings:

FIG. 1 is a first assembly view of the rapid prototyping apparatus for ultra-high molecular weight polymers of the present invention;

FIG. 2 is a second schematic assembly view of the rapid prototyping apparatus for ultra-high molecular weight polymer of the present invention;

FIG. 3 is a third schematic assembly diagram of the rapid prototyping apparatus for ultra-high molecular weight polymer of the present invention;

FIG. 4 is a first schematic view of a bin of the rapid prototyping apparatus of the present invention;

FIG. 5 is a second schematic view of a bin of the rapid prototyping apparatus of the present invention;

FIG. 6 is a first schematic view of the assembly of the rapid prototyping apparatus of the present invention;

fig. 7 is a second schematic view of the assembly of the rapid prototyping apparatus of the present invention.

In the figure: 1. a rapid prototyping device; 2. a storage bin; 201. a first annular portion; 202. a second annular portion; 3. a spray head; 4. a feed bar; 5. a heating module; 501. a first heating zone; 502. a second heating zone; 503. a third heating zone; 6. an auxiliary heating device; 7. a rolling assembly; 701. a compression roller; 702. a fixed seat; 8. a temperature detection device; 9. a work table; 10. a transmission system; 11. and (5) controlling the system.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 to 3 are a first, a second and a third schematic diagrams of a rapid prototyping device 1 for ultra-high molecular weight polymer of the present invention, and it can be seen from the drawings that a control system 11, a transmission system 10, a workbench 9 and the rapid prototyping device 1 constitute a prototyping device for ultra-high molecular weight polymer, the control system 11 of the present invention includes a computer, and electrical components and related devices required for connecting with a device through a data line or a wireless network device, and since related controls such as 3D printing are mature in the art, the present invention is not described in detail, and those skilled in the art can understand that the control system 11 realizes layered cutting of a prototyping workpiece and data transmission and corresponding control to the transmission system 10, and the transmission system 10 includes power components such as a servo motor or a stepping motor, and transmission parts such as belt, band pulley, gear, these are also comparatively common on the 3D printer, consequently do not do detailed description, transmission system 10, its main function lies in realizing the removal of quick forming device 1 and workstation 9 in three-dimensional space, and then realizes the printing shaping of shaping work piece, and in practical application, workstation 9 and quick forming device 1's concrete transmission scheme does not influence the utility model discloses the realization of function, but the shaping that can realize in three-dimensional space prints can.

Further, can see in the picture, the utility model discloses still be provided with auxiliary heating device 6 and temperature-detecting device 8, wherein auxiliary heating device 6 carries out the secondary heating for the ultra high molecular weight polymer that extrudes from shower nozzle 3, makes it at the fashioned in-process of printing, can keep an easy fashioned temperature, and the dwell time is enough long, and the shaping structure of having avoided excessive heat exchange to bring is unstable, bonds not jail scheduling problem between the ultra high molecular weight polymer, sets up temperature-detecting device 8 through the outside at rapid prototyping device 1 simultaneously, can also accurately record the temperature that shower nozzle 3 extrudes the utility model discloses in, the inside position that is close to heating module 5 in feed bin 2 also is provided with temperature-detecting device 8.

Still further, because of the physical properties of the ultra-high molecular weight polymer, the degree of adhesion of the ultra-high molecular weight polymer between different printing layers is poor, so that an external force is applied to the ultra-high molecular weight polymer while performing secondary heating, so that the adhesion of the ultra-high molecular weight polymer between different printing layers is firmer, as shown in fig. 3, a rolling assembly 7 is arranged near the nozzle 3, the rolling assembly 7 comprises a pressing roller 701 and a fixing seat 702, the pressing roller 701 can roll on the printing layers, and then the pressing adhesion of the ultra-high molecular weight polymer extruded by the nozzle 3 and the ultra-high molecular weight polymer of the previous layer is realized, so that the printed structure is firmer.

Still further, the nozzle 3 heats the nozzle 3 through heat transfer of the heating module 5 or a heating device of the nozzle 3 itself, specifically, when the ultra-high molecular weight polymer passes through the nozzle 3, the temperature of the nozzle 3 needs to be close to the temperature of the third heating area 503, so as to ensure the state when the ultra-high molecular weight polymer is extruded from the nozzle 3, and the nozzle 3 can be heated through heat transfer of the heating module 5, or the nozzle 3 is provided with the heating device to directly heat the nozzle 3, so that the nozzle 3 reaches the temperature of the third heating area 503.

Fig. 4 and 5 are schematic diagrams of a first and a second of a bin 2 of a rapid prototyping apparatus 1 of the present invention, which mainly show the internal structure of the bin 2, and as can be seen from fig. 4 and 5, the bin 2 of the present invention is divided into two structures, which are mainly distinguished by the installation position of a heating module 5, in fig. 4, the heating module 5 is installed outside the bin 2, in fig. 5, the heating module 5 is installed inside the bin 2, in the figure, it can also be seen that the heating module 5 is formed with at least three heating regions in the height direction of the bin 2, which are a first heating region 501, a second heating region 502 and a third heating region 503, respectively, the temperatures of each heating region are different, and since the ultra-high molecular weight polymer is easily expanded after being heated to the melting state, and the extrusion force is large, the conventional extruder cannot realize the extrusion of the ultra-high molecular weight polymer in the, and the utility model discloses a heating region with feed bin 2 sets up to three, make the ultra high molecular weight polymer add into feed bin 2 after, obtain the process of preheating, avoid the temperature to rise suddenly and bring the ultra high molecular weight polymer inflation, when extrusion pressure grow, the ultra high molecular weight polymer still can obtain fine heating environment in feed bin 2, in third heating region 503, the ultra high molecular weight polymer is heated to molten state, the ultra high molecular weight polymer that will be in the molten state of third heating region 503 at second heating region 502 and first heating region 501 extrudes from shower nozzle 3, the shared feed bin 2's of molten state ultra high molecular weight polymer proportion is little, and there is sufficient preheating space, when having guaranteed to extrude, the expanded problem of the ultra high molecular weight polymer of molten state has been avoided.

Further, the utility model discloses heating area with the heating module divide into first heating area 501, second heating area 502 and third heating area 503, in practical application, according to the nature of different ultra high molecular weight polymer, can be as required with the heating area scope of heating module more than three or below three, the main aim at that sets up the heating area prevents that ultra high molecular weight polymer from getting into the molten state too early, and the ultra high molecular weight polymer inflation under the molten state when leading to extruding, leads to the unable problem of extruding.

Fig. 6 and 7 are first and second schematic diagrams of the assembly of the rapid prototyping device 1 of the present invention, which mainly show the combination situation during the switching process of the rapid prototyping device 1, when one of the rapid prototyping devices 1 finishes the consumption of the ultra-high molecular weight polymer, the control system 11 starts other rapid prototyping devices 1 still containing the ultra-high molecular weight polymer, as can be seen from the figure, each rapid prototyping device 1 at least has two modes of height displacement and horizontal displacement, the height displacement transmission system 10 is implemented, the horizontal displacement is implemented by the internal combination mode of the rapid prototyping device 1, the horizontal displacement of fig. 6 is implemented by the translation mode, the horizontal displacement of fig. 7 is implemented by the rotation mode, the rapid prototyping device 1 finishes the consumption of the ultra-high molecular weight polymer, the height displacement is implemented first, carry out horizontal displacement after, and then realize following leaving of operating position holds ultra high molecular weight polymer rapid prototyping device 1 carries out horizontal displacement earlier, reaches behind the operating position, carries out high displacement, in figure 6 and figure 7, has only demonstrateed rapid prototyping device 1's the position that sets up, because drive arrangement and how to realize the transmission, all belongs to comparatively common in the transmission field, also not the utility model discloses a little, therefore do not make too much repeated description.

The utility model provides a quick forming device 1 of ultra high molecular weight polymer and application method thereof, adopt the mode of high temperature melting, heat the ultra high molecular weight polymer to the molten condition and extrusion moulding, it is big to have the span of adaptation temperature interval, strong adaptability to the environment, save material, and print characteristics such as shaping structure is nimble changeable, in addition through setting up the heating region that is the gradient change, avoided the ultra high molecular weight polymer expansion deformation in the molten condition, the problem that can't extrude, simultaneously through addding laser auxiliary heating, avoided the ultra high molecular weight polymer calorific loss of extruding great, the adhesion is not good, the problem of shaping quality is poor; and through addding rolling press subassembly 7, roll the compaction with ultra high molecular weight polymer, avoided ultra high molecular weight polymer viscidity relatively poor, the not strong problem of bonding nature between the layer.

Example one

As shown in fig. 1 to 5, a rapid prototyping apparatus 1 for ultra-high molecular weight polymer according to the present embodiment includes a storage bin 2, a chamber for containing the ultra-high molecular weight polymer is disposed inside the storage bin; the spray head 3 is arranged at the bottom of the stock bin 2; the feeding rod 4 is arranged to extend into or out of the top of the storage bin 2 and is used for extruding the molten ultrahigh molecular weight polymer out of the storage bin 2 from the spray head 3; and the heating module 5 is used for forming a heating area with gradually increasing temperature from the top of the storage bin 2 to one side of the bottom spray head 3.

The heating zones are divided into a first heating zone 501, a second heating zone 502 and a third heating zone 503 from the top to the bottom of the silo 2 in sequence; the ultra-high molecular weight polymer in the first heating area 501 is in an original state when being placed in the storage bin 2; the ultra-high molecular weight polymer in the second heating zone 502 is in a transition state from an original state to a molten state; the ultra-high molecular weight polymer in the third heating zone 503 is in a molten state.

Example two

As shown in fig. 1 to fig. 5, based on the first embodiment, in the present embodiment, a ratio of a heating range of the first heating region 501 to a sum of heating ranges of the second heating region 502 and the third heating region 503 of the rapid prototyping apparatus 1 for ultra-high molecular weight polymer is between 1:3 and 1: 1; the heating range ratio of the secondary heating zone 502 to the tertiary heating zone 503 is between 1:5 and 1: 1.

EXAMPLE III

As shown in fig. 1 to 5, in this embodiment, based on the first embodiment or the second embodiment, the heating module 5 is a heating wire cooperating with the storage bin 2; the heating temperature of the heating module 5 is between 100 ℃ and 450 ℃.

Example four

As shown in fig. 1 to 5, the present embodiment is based on any one of the first to third embodiments, and further includes a temperature detecting device 8 disposed in the third heating region 503 of the heating module 5 for detecting the temperature of the heating module 5, and as shown in fig. 2, the temperature detecting device 8 is also disposed outside the rapid prototyping device 1 for detecting the temperature of the ultra-high molecular weight polymer based on the nozzle 3 and the temperature of the print-formed ultra-high molecular weight polymer.

EXAMPLE five

As shown in fig. 1 to 5, based on any one of the first to fourth embodiments, the storage bin 2 of the present embodiment is a hollow structure, and the hollow structure forms a chamber for containing an ultra-high molecular weight polymer; the feeding rod 4 is of a rod-shaped structure and is matched with the hollow structure of the storage bin 2; the spray head 3 is arranged at the bottom of the hollow structure; the heating module 5 is annularly arranged outside the storage bin 2.

Alternatively, the silo 2 comprises a first annular part 201 and a second annular part 202 sleeved outside the first annular part 201; the gap between the first annular portion 201 and the second annular portion 202 forms a chamber for containing an ultra-high molecular weight polymer; the feeding rod 4 is of a rod-shaped structure and is matched with the shape of a gap between the first annular part 201 and the second annular part 202; the spray head 3 is connected to the second annular portion 202; the heating module 5 is disposed inside the first annular portion 201 of the magazine 2.

Fig. 4 and 5 are schematic diagrams of a first and a second of a bin 2 of a rapid prototyping apparatus 1 of the present invention, which mainly show the internal structure of the bin 2, and it can be seen from fig. 4 and 5 that the bin 2 of the present invention is divided into two structures, which are mainly distinguished by the installation position of a heating module 5, in fig. 4, the heating module 5 is installed outside the bin 2, in fig. 5, the heating module 5 is installed inside the bin 2, and it can also be seen that the heating module 5 is formed with three heating regions in the height direction of the bin 2, which are a first heating region 501, a second heating region 502 and a third heating region 503, respectively, and the temperature of each heating region is different, since the ultra-high molecular weight polymer is easy to expand after being heated to the melting state, and is strong and large to be extruded, the conventional extruder cannot realize the extrusion of the ultra-high molecular weight polymer in the melting, the utility model arranges three heating areas of the storage bin 2, so that after the ultra-high molecular weight polymer is added into the storage bin 2, the preheating process is obtained, the expansion of the ultra-high molecular weight polymer and the increase of the extrusion pressure caused by the sudden temperature rise are avoided, simultaneously, the ultra-high molecular weight polymer can still obtain a good heating environment in the storage bin 2, in the third heating area 503, the ultra-high molecular weight polymer is heated to a molten state, the ultra-high molecular weight polymer in the third heating area 503 is extruded from the spray head 3 by the ultra-high molecular weight polymer in the second heating area 502 and the first heating area 501, the proportion of the ultra-high molecular weight polymer in the molten state in the silo 2 is small, and enough preheating space is provided, so that the problem of expansion of the ultrahigh molecular weight polymer in a molten state is avoided while extrusion is ensured.

EXAMPLE six

In this embodiment, based on the fifth embodiment, the feeding rod 4 in this embodiment is a plunger rod structure or a screw rod structure.

EXAMPLE seven

As shown in fig. 1 to fig. 5, based on any one of the first to sixth embodiments, the present embodiment of the rapid prototyping apparatus 1 for ultra-high molecular weight polymer further includes an auxiliary heating device 6, which is used for secondarily heating the ultra-high molecular weight polymer extruded by the nozzle 3; the laser emitted by the auxiliary heating device 6 is an annular hollow light beam; the annular hollow light beam emitted by the auxiliary heating device 6 can be emitted to the position of the ultrahigh molecular weight polymer extruded by the spray head 3; the hollow part of the annular hollow light beam is not less than the diameter of the ultra-high molecular weight polymer extruded by the corresponding spray head 3, because the ultra-high molecular weight polymer is sent out by the spray head 3 and then exchanges heat with the external environment, the external temperature of the ultra-high molecular weight polymer is lower, the inner temperature is higher, and the ultra-high molecular weight polymer is not easy to be bonded between different printing layers due to the property of the ultra-high molecular weight polymer, the utility model heats the ultra-high molecular weight polymer extruded by the spray head 3 through the annular hollow light beam, so that the external temperature of the ultra-high molecular weight polymer can be maintained at a higher temperature, which is equivalent to the temperature of the inside of the ultra-high molecular weight polymer extruded from the spray head 3, the adhesive can be kept in an easily-adhered state in the extrusion bonding process, and the structural strength after molding is improved.

Fig. 1 to fig. 3 are the utility model discloses rapid prototyping device 1 of ultra-high molecular weight polymer is first, second and third schematic diagram, can see from the picture, the utility model discloses still be provided with auxiliary heating device 6 and temperature-detecting device 8, wherein auxiliary heating device 6 carries out the secondary heating for the ultra-high molecular weight polymer that extrudes from shower nozzle 3, make it at the in-process of printing the shaping, can keep an easy fashioned temperature, and the holding time is enough long, avoided the shaping structure that excessive heat exchange brought unstable, the not firm scheduling problem that bonds between the ultra-high molecular weight polymer, set up temperature-detecting device 8 through the outside at rapid prototyping device 1 simultaneously, can also accurately record the temperature that shower nozzle 3 extrudes, in the utility model discloses, the position that is close to heating module 5 inside feed bin 2 also is provided with temperature-detecting device 8.

Example eight

As shown in fig. 1 to 5, based on any one of the first to seventh embodiments, the present embodiment of the rapid prototyping apparatus 1 for ultra-high molecular weight polymer further includes a rolling assembly 7, configured to compact the ultra-high molecular weight polymer extruded by the nozzle 3; the rolling assembly 7 comprises a press roller 701, and the ultra-high molecular weight polymer is compacted by rolling on the surface of the ultra-high molecular weight polymer extruded by the spray head 3; a fixing seat 702 for fixing the pressing roller 701; the holder 702 is movable in the height direction of the silo 2.

Fig. 1 to fig. 3 are the utility model discloses rapid prototyping device 1 of ultra-high molecular weight polymer is first, second and third schematic diagram, can see from the drawing, because the physical property of ultra-high molecular weight polymer, it is relatively poor that its difference prints the ultra-high molecular weight polymer degree of adhesion between the layer, consequently in secondary heating, still need to exert external force to it, so that the ultra-high molecular weight polymer bonding between the different printing layers is more firm, shown in fig. 3, be provided with rolling assembly 7 near shower nozzle 3, rolling assembly 7 includes compression roller 701 and fixing base 702, compression roller 701 is for can rolling on printing the layer, and then realize that the ultra-high molecular weight polymer that shower nozzle 3 extruded and the ultra-high molecular weight polymer of last layer compress tightly the bonding, the structure that makes it print out is more firm.

Example nine

Based on any one of the first to eighth embodiments, the present embodiment provides a method for rapid prototyping an ultra-high molecular weight polymer, including,

the workbench 9 is used for containing the ultrahigh molecular weight polymer extruded by the rapid prototyping device 1;

the transmission system 10 drives the rapid prototyping device 1 and the workbench 9 to move in a three-dimensional space;

the control system 11 is respectively connected with the rapid prototyping device 1, the workbench 9 and the transmission system 10 and stores the three-dimensional shape information of the prototyping workpiece;

also comprises

Step 101, filling an ultra-high molecular weight polymer into a bin 2 of a rapid prototyping device 1, placing the rapid prototyping device 1 at a working position, and connecting the rapid prototyping device with a transmission system 10;

102, selecting a required forming workpiece in the control system 11, and setting printing parameters;

103, slicing the three-dimensional body of the workpiece to be formed through the control system 11, converting the three-dimensional body into two-dimensional layered cross section information, and obtaining a motion track scanned layer by layer along the height direction;

104, starting a heating module 5 of the rapid prototyping device 1, detecting the temperature of the heating module 5 in real time by a temperature detection device 8, and transmitting data to the control system 11;

105, when the temperature of the heating module 5 reaches a preset temperature, the control system 11 transmits the motion track of the two-dimensional layered cross section of the formed workpiece to the transmission system 10, and the transmission system 10 moves the rapid forming device 1 to an initial position;

106, moving the feeding rod 4 from the top to the bottom of the storage bin 2 to push the ultra-high molecular weight polymer in the storage bin 2, and extruding the molten ultra-high molecular weight polymer from the spray head 3;

step 1061, starting the auxiliary heating device 6 by the control system 11, and secondarily heating the ultra-high molecular weight polymer extruded by the nozzle 3 by the auxiliary heating device 6;

step 107, the transmission system 10 finishes printing the layer according to the motion track of the two-dimensional layered cross section of the formed workpiece;

step 1071, the rolling assembly 7 compacts the ultra-high molecular weight polymer extruded by the nozzle 3 along with the movement of the rapid prototyping device 1;

step 108, after printing the current layer, the transmission system 10 moves the rapid prototyping device 1 to the initial position, and moves the rapid prototyping device 1 or the workbench 9 in the height direction to the next layer;

step 109, repeating the steps 106 to 108 until the integral printing of the formed workpiece is finished;

step 110: and taking out the workpiece to obtain a final formed workpiece.

Example ten

Based on the ninth embodiment, in the step 104 of this embodiment, the heating module 5 is formed with a heating area corresponding to the bin 2 of the rapid prototyping device 1; the heating areas are at least divided into a first heating area 501, a second heating area 502 and a third heating area 503 from the top to the bottom of the silo 2; the ultra-high molecular weight polymer in the first heating area 501 is in an original state when being placed in the storage bin 2; the ultra-high molecular weight polymer in the second heating zone 502 is in a transition state from an original state to a molten state; the ultra-high molecular weight polymer in the third heating zone 503 is in a molten state; the ratio of the heating range of the first heating zone 501 to the sum of the heating ranges of the second heating zone 502 and the third heating zone 503 is between 1:3 and 1: 1; the heating range ratio of the secondary heating zone 502 to the tertiary heating zone 503 is between 1:5 and 1: 1.

EXAMPLE eleven

Based on the ninth embodiment or the tenth embodiment, the step 104 of this embodiment further includes a step 1041 of heating the working table 9 until a set temperature is reached; the set temperature of the table 9 is 20 ℃ to 200 ℃.

Example twelve

Based on any one of the ninth embodiment to the eleventh embodiment, in this embodiment, the preset temperature range in the step 105 is between 100 ℃ and 450 ℃; the ultra-high molecular weight polymer is one or a combination of more of wire, powder and granules.

EXAMPLE thirteen

Based on any one of the ninth to twelfth embodiments, in step 1061 of this embodiment, the laser emitted by the auxiliary heating device 6 is an annular hollow beam; the annular hollow light beam emitted by the auxiliary heating device 6 can be emitted to the position of the ultrahigh molecular weight polymer extruded by the spray head 3; the hollow part of the annular hollow light beam is not smaller than the diameter of the ultrahigh molecular weight polymer extruded by the corresponding spray head 3.

Example fourteen

Based on any one of the ninth embodiment to the thirteenth embodiment, in step 1071, the rolling assembly 7 includes a pressing roller 701, which rolls on the surface of the ultra-high molecular weight polymer extruded by the nozzle 3 to compact the ultra-high molecular weight polymer; a fixing seat 702 for fixing the pressing roller 701; the holder 702 is movable in the height direction of the silo 2.

Example fifteen

Based on any one of the ninth embodiment to the fourteenth embodiment, the step 108 of this embodiment further includes a step 1081, where at least two rapid prototyping apparatuses 1 are used for containing the ultra-high molecular weight polymer; when the ultra-high molecular weight polymer in one of the rapid prototyping devices 1 is completely consumed, the control system 11 starts other rapid prototyping devices 1 still containing ultra-high molecular weight polymer, and jumps back to step 104 to start execution.

Example sixteen

Based on the fifteenth embodiment, in the present embodiment, in the switching process of the rapid prototyping apparatuses 1 in the step 1081, each rapid prototyping apparatus 1 has at least two modes, namely a height displacement mode and a horizontal displacement mode; after the ultrahigh molecular weight polymer is completely consumed, the rapid prototyping device 1 firstly executes height displacement and then horizontal displacement, so as to realize the separation from the working position; the rapid prototyping apparatus 1 containing the ultra-high molecular weight polymer performs horizontal displacement first, and performs height displacement after reaching the working position.

Fig. 6 and 7 are first and second schematic diagrams of the assembly of the rapid prototyping device 1 of the present invention, which mainly show the combination situation during the switching process of the rapid prototyping device 1, when one of the rapid prototyping devices 1 finishes the consumption of the ultra-high molecular weight polymer, the control system 11 starts other rapid prototyping devices 1 still containing the ultra-high molecular weight polymer, as can be seen from the figure, each rapid prototyping device 1 at least has two modes of height displacement and horizontal displacement, the height displacement transmission system 10 is implemented, the horizontal displacement is implemented by the internal combination mode of the rapid prototyping device 1, the horizontal displacement of fig. 6 is implemented by the translation mode, the horizontal displacement of fig. 7 is implemented by the rotation mode, the rapid prototyping device 1 finishes the consumption of the ultra-high molecular weight polymer, the height displacement is implemented first, carry out horizontal displacement after, and then realize following leaving of operating position holds ultra high molecular weight polymer rapid prototyping device 1 carries out horizontal displacement earlier, reaches behind the operating position, carries out high displacement, in figure 6 and figure 7, has only demonstrateed rapid prototyping device 1's the position that sets up, because drive arrangement and how to realize the transmission, all belongs to comparatively common in the transmission field, also not the utility model discloses a little, therefore do not make too much repeated description.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the combination according to the known technical solutions and technical problems to be solved by the present application.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims (10)

1. The utility model provides a rapid prototyping device of ultra high molecular weight polymer which characterized in that: comprises that

The device comprises a storage bin (2), a cavity for containing the ultra-high molecular weight polymer is arranged in the storage bin (2), and a spray head (3) is arranged at the bottom of the storage bin (2);

the feeding rod (4) is matched with the storage bin (2) and reciprocates in the storage bin (2) along the axial direction of the feeding rod (4);

one end of the feeding rod (4) faces one side of the spray head (3) to extrude the ultra-high molecular weight polymer in the storage bin (2) from the spray head (3);

the heating module (5) is used for forming a heating area with gradually increasing temperature from the top of the storage bin (2) to one side of the bottom spray head (3);

the auxiliary heating device (6) is used for carrying out secondary heating on the ultrahigh molecular weight polymer extruded by the spray head (3);

and the rolling assembly (7) is used for compacting the ultrahigh molecular weight polymer extruded by the spray head (3).

2. The rapid prototyping apparatus of ultra-high molecular weight polymer as set forth in claim 1 wherein:

the heating area is at least divided into a first heating area (501), a second heating area (502) and a third heating area (503) from the top to one side of the bottom of the storage bin (2) in sequence;

the heating temperatures of the first heating zone (501), the second heating zone (502) and the third heating zone (503) are sequentially increased.

3. The rapid prototyping apparatus of ultra-high molecular weight polymer as set forth in claim 2 wherein:

heating the ultra-high molecular weight polymer in any heating area among the first heating area (501), the second heating area (502) and the third heating area (503) to be uniform;

within the third heating zone (503), the ultra-high molecular weight polymer is in a molten state.

4. The rapid prototyping apparatus of ultra-high molecular weight polymer as set forth in claim 3 wherein:

the ratio of the heating range of the first heating zone (501) to the sum of the heating ranges of the second heating zone (502) and the third heating zone (503) is between 1:3 and 1: 1;

the heating range ratio of the second heating zone (502) to the third heating zone (503) is between 1:5 and 1: 1;

the heating module (5) is a heating wire.

5. The rapid prototyping apparatus of ultra-high molecular weight polymer as set forth in claim 4 wherein:

the heating device also comprises a temperature detection device (8) which is arranged in the third heating area (503) of the heating module (5) and is used for detecting the temperature of the heating module (5);

the spray head (3) is heated by heat transfer of the heating module (5) or a heating device arranged on the spray head (3).

6. The rapid prototyping apparatus of ultra-high molecular weight polymer as set forth in any one of claims 1-5 wherein:

the auxiliary heating device (6) realizes secondary heating of the ultra-high molecular weight polymer extruded by the spray head (3) in a laser emitting mode;

the laser emitted by the auxiliary heating device (6) is an annular hollow light beam;

the annular hollow light beam emitted by the auxiliary heating device (6) can be emitted to the position of the ultra-high molecular weight polymer extruded by the spray head (3);

the hollow part of the annular hollow light beam is not smaller than the diameter of the ultra-high molecular weight polymer extruded by the spray head (3).

7. The rapid prototyping apparatus of ultra-high molecular weight polymer as set forth in any one of claims 1-5 wherein: the rolling assembly (7) comprises

The compression roller (701) is used for compacting the ultrahigh molecular weight polymer by rolling on the surface of the ultrahigh molecular weight polymer extruded by the spray head (3);

a fixing seat (702) for realizing the fixation of the compression roller (701);

the fixing base (702) can move in the height direction of the silo (2).

8. The rapid prototyping apparatus of ultra-high molecular weight polymer as set forth in any one of claims 1-5 wherein:

the storage bin (2) is of a hollow structure, and the hollow structure forms a cavity for containing the ultrahigh molecular weight polymer;

the feeding rod (4) is of a rod-shaped structure and is matched with the hollow structure of the storage bin (2);

the spray head (3) is arranged at the bottom of the hollow structure;

the heating module (5) is annularly arranged outside the storage bin (2);

the feeding rod (4) is of a plunger rod-shaped structure or a threaded rod-shaped structure.

9. The rapid prototyping apparatus of ultra-high molecular weight polymer as set forth in any one of claims 1-5 wherein:

the storage bin (2) comprises a first annular part (201) and a second annular part (202) sleeved outside the first annular part (201);

the gap between the first annular portion (201) and the second annular portion (202) forms a chamber containing an ultra-high molecular weight polymer;

the feeding rod (4) is of a rod-shaped structure and is matched with the shape of a gap between the first annular part (201) and the second annular part (202);

the nozzle head (3) is connected with the second annular part (202);

the heating module (5) is arranged inside the first annular part (201) of the storage bin (2);

the feeding rod (4) is of a plunger rod-shaped structure or a threaded rod-shaped structure.

10. A rapid prototyping system of ultra-high molecular weight polymer which characterized in that: comprises that

A rapid prototyping apparatus for ultra-high molecular weight polymers as set forth in any one of claims 1 through 9;

the workbench (9) is used for containing the ultrahigh molecular weight polymer extruded by the rapid prototyping device (1);

the transmission system (10) drives the rapid prototyping device (1) and the workbench (9) to move in a three-dimensional space;

and the control system (11) is respectively connected with the rapid forming device (1), the workbench (9) and the transmission system (10) and stores the three-dimensional shape information of the formed workpiece.

Images