3D printer hot cavity with variable space

Abstract

The utility model discloses a 3D printer heat cavity with variable space. The 3D printer heat cavity comprises a printer main body, a spray head assembly, a printing workpiece, a heat insulation curtain, a hot bed, a heater, a circulating fan, a heat insulation wall, a heat insulation roller and a hot bed bracket. The heat-insulating curtain is mounted on the upper side in the heat cavity; the hot bed is used for bearing a printing workpiece and firmly bonding the printing workpiece; the heater is mounted on the hot bed bracket and is used for heating the whole hot cavity; the circulating fan is used for circulating air in the whole heat cavity, so that the temperature of each position in the heat cavity is uniform; the heat insulation walls are distributed at the front, back, left and right lower parts of the hot cavity and the lower part of the hot bed for isolating the hot cavity from the outside to achieve a heat preservation effect; the hot bed support is driven by the Z-axis movement system and used for bearing all parts of the hot bed and a lower heat insulation wall of the hot bed. The working state of the heater is dynamically adjusted by adjusting the space size of the heat cavity, and resource waste is avoided while the heating requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing technical field especially relates to a variable space's 3D printer hot cavity. BACKGROUND

[0002] The current FDM 3D printer is mainly divided into ordinary low-temperature material (such as PLA, PLA-FC, PETG, etc.) 3D printer, toughness medium-temperature material (such as ABS, PC, etc.) 3D printer and high-performance high-temperature resistant material (such as PETG, etc.) 3D printer according to printing material. The ordinary low-temperature material has lower requirement on the printer environment, and general open printer can complete, but for medium-temperature and high-temperature resistant material, the requirement on the printer is more stringent, especially the high-temperature resistant material, which requires that the printing space temperature reaches 300 DEG C or above and maintains constant temperature.

[0003] With the application of 3D printing more and more inclined to industrial field, the demand for high-temperature resistant material is also more and more extensive, and the printing size is gradually increased. At this time, the printing environment of 3D printer is also required to be higher and higher. In order to maintain a higher printing environment temperature in the printing cavity, high-power heating is required for the printing cavity, and heat insulation material is used to isolate the inside and outside to achieve the purpose of constant temperature.

[0004] The main methods at present are: ①, substrate heating, the substrate temperature is dissipated to the inside of the cavity by natural heat dissipation, the advantage is fast heating, the disadvantage is uneven heat dissipation, the space temperature near the substrate is higher, when printing to a certain height, the environment temperature of the part far away from the substrate is lower; ②, the cavity increases a separate heating device, and the platform is heated, which requires high heating power, but due to the independent heating of the hot bed, the heat balance cannot be guaranteed; ③, cavity heating, the substrate is heated through air circulation, such heating method needs a relatively long preheating time before printing, which seriously affects the printing efficiency.

[0005] In summary, the current several heating methods cannot effectively solve the problem of constant temperature of the hot cavity, and the large high-temperature 3D printer faces very high heating power.

[0006] In summary, the current large 3D printer heating cavity design is extremely unreasonable, and there is a large waste. UTILITY MODEL CONTENT

[0007] The utility model provides a variable space's 3D printer hot cavity. To solve a series of problems generated by cavity heating of large industrial 3D printer. In order to realize the above purpose, the technical scheme of the utility model is as follows.

[0008] A variable space's 3D printer hot cavity, comprising;

[0009] The printer body is used for bearing all parts of the 3D printer;

[0010] The nozzle assembly is used for extruding consumables according to program instructions;

[0011] The printed workpiece is a workpiece printed by the printer;

[0012] The heat insulation curtain is installed on the upper side of the heat cavity and is used for dynamically isolating the inner and outer spaces so that heat cannot be dissipated from the heat cavity;

[0013] The heat bed is used for bearing the printed workpiece and firmly bonding the printed workpiece;

[0014] The heater is installed on the heat bed support and is used for heating the entire heat cavity;

[0015] The circulating fan is installed in the heat cavity and is used for circulating air in the entire heat cavity, so that the temperatures of various positions in the heat cavity are uniform;

[0016] The heat insulation wall is composed of a heat insulation material and a shell and is distributed on the front, back, left, right and lower parts of the heat cavity and the lower part of the heat bed and is used for isolating the heat cavity from the outside to achieve a heat preservation effect;

[0017] The heat bed support is driven by the Z-axis movement system and is used for bearing all parts of the heat bed and the lower heat insulation wall of the heat bed.

[0018] As a further technical scheme of the utility model, the roller is installed at the two ends of the lower heat insulation wall of the heat bed and is used for avoiding friction between the lower heat insulation wall of the heat bed and the side heat insulation wall, and three vertical rollers are arranged to effectively avoid heat air leakage and achieve a sealing effect.

[0019] As a further technical scheme of the utility model, the number of the circulating fans is at least two, and the circulating fans are symmetrically arranged on the two sides of the heat cavity.

[0020] The utility model realizes the beneficial effects that:

[0021] The utility model introduces a 3D printer heat cavity with variable space, solves the constant temperature problem of the heating cavity of the existing large 3D printer, dynamically adjusts the working state of the heater by adjusting the size of the heat cavity space, guarantees the heating demand, and avoids waste of resources. DRAWINGS

[0022] Fig. 1 It is a whole structure schematic view of the 3D printer heat cavity with variable space.

[0023] Fig. 2 It is a partial structure schematic view of the 3D printer heat cavity with variable space.

[0024] Fig. 3 It is a structure schematic view of the hot bed support of the variable space 3D printer hot cavity after moving down.

[0025] The figure mark annotation: 1-printer main body, 2-nozzle assembly, 3-printing workpiece, 4-heat insulation curtain, 5-hot bed, 6-heater, 7-circulating fan, 8-heat insulation wall, 9-heat insulation roller, 10-hot bed support. DETAILED DESCRIPTION

[0026] The technical scheme of the utility model is introduced in detail below in combination with specific drawings.

[0027] Please refer to Figs. 1 to 3 The utility model embodiment provides a variable space 3D printer hot cavity, including printer main body 1, nozzle assembly 2, printing workpiece 3, heat insulation curtain 4, hot bed 5, heater 6, circulating fan 7, heat insulation wall 8, heat insulation roller 9, hot bed support 10;

[0028] The printer main body 1 is a large industrial 3D printer main body, and functions to bear the installation of all parts of the 3D printer;

[0029] The nozzle assembly 2 is used to extrude consumables according to program instructions;

[0030] The printing workpiece 3 is a workpiece printed by the printer;

[0031] The heat insulation curtain 4 is installed on the upper side in the hot cavity and is used to dynamically isolate the inner and outer spaces, so that heat cannot be dissipated from the hot cavity;

[0032] The hot bed 5 is used to bear the printing workpiece 3 and firmly bond the printing workpiece 3;

[0033] The heater 6 is installed on the hot bed support 10 and is used to heat the entire hot cavity;

[0034] The circulating fan 7 is installed in the hot cavity and is used to circulate the air in the entire hot cavity, so that the temperature at each position in the hot cavity is uniform;The number of the circulating fan 7 is at least two, and the circulating fan 7 is symmetrically arranged on both sides in the hot cavity;

[0035] The heat insulation wall 8 is composed of a heat insulation material and a shell and is distributed on the front, back, left, right, lower and lower part of the hot bed 5, and is used to isolate the hot cavity from the outside world, so as to achieve the heat preservation effect;

[0036] The roller 9 is installed at both ends of the heat insulation wall 8 below the hot bed and is used to avoid the friction between the heat insulation wall 8 below the hot bed and the side heat insulation wall 8, and three rollers 9 in the vertical direction are arranged to effectively avoid the leakage of hot air and achieve the sealing effect;

[0037] The hot bed support 10, driven by the Z-axis movement system, is used to carry all parts of the hot bed 5 and the lower heat insulation wall 8 of the hot bed.

[0038] When the 3D printer starts working, the hot bed 5 is at the top end, so the hot cavity space surrounded by the heat insulation wall 8 and the heat insulation curtain 4 is at the minimum state. Through the heating of the heater 6 and the hot air circulation of the circulating fan 7, the hot cavity can quickly reach the set temperature. At this time, the heater 6 is in an intermittent working state. When the temperature is higher than the set temperature, the heater 6 works, and when the temperature is lower than the set temperature, the heater 6 does not work.

[0039] Further, when the printed workpiece 3 gradually rises, the hot bed support 10 moves downward under the driving of the Z-axis movement mechanism, and the hot cavity gradually increases. At this time, the working time of the heater 6 will gradually increase until the printing is completed.

[0040] In the embodiment, when the hot bed is at zero position, the hot cavity space is V0, the average heating power at this time is P0, the printing time is t0, and the heater 6 does work W0=P0t0. When the printing time increases , the hot cavity space also increases , and the average heating power also increases . At this time, the average heating power P is a function P(t) of the printing time, so the work function is:

[0041] ;

[0042] After integral transformation, the total power consumption of the printing process is: ;

[0043] And the power consumption required by the existing fixed hot cavity is ;

[0044] Since is always much smaller than .

[0045] Therefore, the 3D printer with a variable heating cavity can save a large amount of energy and meet the basic requirements of low carbon and environmental protection.

[0046] The utility model discloses a kind of variable space 3D printer hot cavities, by adjusting the size of hot cavity, the working state of heater is dynamically adjusted, while guaranteeing heating demand, avoid the waste of resources.

[0047] It is to be understood that the terminology "including", "comprising", or other derivatives thereof, are intended to be open-ended and also to encompass the addition of zero or more elements or ingredients. Numerical amounts set forth herein are approximations. Nothing in the specification should be construed as a limitation on the scope of the invention.

[0048] The preferred embodiments of the present application have been described above with the preferred embodiments; however, it should be noted that the patent range of the present application is not limited by the above description, and any equivalent structure or equivalent process transformation obtained by using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A variable volume 3D printer hot chamber, characterized by, Comprise; The printer body, which is used to carry all the parts of the 3D printer; The nozzle assembly, which is used to extrude the consumables according to the program instructions; The printed workpiece, which is the workpiece printed by the printer; The thermal curtain, which is installed on the upper side of the thermal chamber, is used to dynamically isolate the inside and outside space, so that the heat cannot be dissipated from the thermal chamber; The hot bed, which is used to carry the printed workpiece and firmly bond the printed workpiece; The heater, which is installed on the hot bed bracket, is used to heat the whole thermal chamber; The circulating fan, which is installed in the thermal chamber, is used to circulate the air in the whole thermal chamber, so that the temperature of each position in the thermal chamber is uniform; The thermal wall, which is composed of thermal insulation material and shell, is distributed in the front, back, left and right of the thermal chamber and the lower part of the thermal bed, which is used to isolate the thermal chamber from the outside and achieve the heat preservation effect; The hot bed bracket, which is driven by the Z-axis motion system, is used to carry all the parts of the hot bed and the lower thermal wall of the hot bed.

2. A variable volume 3D printer hot chamber according to claim 1, wherein, It also includes the roller, which is installed at both ends of the lower thermal wall of the hot bed, is used to avoid the friction between the lower thermal wall of the hot bed and the side thermal wall, and the three vertical direction rollers can effectively avoid the leakage of hot air and achieve the sealing effect.

3. The variable volume 3D printer hot chamber of claim 1, wherein, The number of circulating fans is at least two, which are symmetrically arranged on both sides of the thermal chamber.

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