A 3D printer heat chamber with variable space

Abstract

The present invention discloses a variable space 3D printer heat chamber, including a printer body, a nozzle 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 insulation curtain is installed on the upper side of the hot chamber; the hot bed is used to carry the printing workpiece and firmly bond the printing workpiece; the heater is installed on the hot bed bracket, and is used to heat the entire hot chamber; the circulating fan is used to circulate the air of the entire hot chamber, so that the temperature of each position in the hot chamber is uniform; the heat insulation wall is distributed in the front, back, left, right, and bottom of the hot chamber and the lower part of the hot bed, and is used to isolate the hot chamber from the outside world to achieve a heat preservation effect; the hot bed bracket is driven by a Z-axis motion system, and is used to carry all parts of the hot bed and the lower heat insulation wall of the hot bed. By adjusting the size of the hot chamber space, the working state of the heater is dynamically adjusted to ensure the heating demand while avoiding the waste of resources.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printer thermal chamber with variable space. Background Art

[0002] At present, FDM 3D printers are mainly divided into 3D printers for ordinary low-temperature materials (such as PLA, PLA-FC, PETG, etc.); 3D printers for tough medium-temperature materials (such as ABS, PC, etc.); and 3D printers for high-performance high-temperature resistant materials (such as PETG, etc.) according to the printing materials. Ordinary low-temperature materials have lower requirements for the printer environment, and generally an open printer can complete it. For medium-temperature and high-temperature resistant materials, the requirements for the printer are more stringent, especially for high-temperature resistant materials, which require the printing space temperature to reach above 300 degrees Celsius and maintain a constant temperature.

[0003] As the application of 3D printing is increasingly biased towards the industrial field, the demand for high-temperature resistant materials is becoming more and more widespread, and the printing size is gradually increasing. At this time, the printing environment requirements for 3D printers are also becoming higher and higher. In order to maintain a higher printing environment temperature in the printing chamber, it is necessary to heat the printer chamber with high power, and use thermal insulation materials to isolate the inside and outside to achieve the purpose of constant temperature.

[0004] The main methods adopted at this stage are: 1. Substrate heating, which dissipates the substrate temperature into the cavity through natural heat dissipation. The advantage is fast heating, but the disadvantage is uneven heat dissipation. The temperature of the space close to the base is higher. When printing to a certain height, the ambient temperature of the part farther away from the substrate is lower; 2. Add a separate heating device to the cavity and heat the platform at the same time. This method requires higher heating power, but since the hot bed is heated independently, thermal balance cannot be guaranteed; 3. Cavity heating, which heats the substrate through air circulation. This heating method requires the temperature of the entire hot cavity to rise in order for the hot bed temperature to reach the predetermined value. Therefore, a relatively long preheating time is required before printing, which seriously affects printing efficiency.

[0005] In summary, the current heating methods cannot effectively solve the problem of constant temperature of the hot chamber. At the same time, large-scale high-temperature 3D printers face very high heating power.

[0006] In summary, the current design of the heating chamber of large-scale 3D printers is extremely unreasonable and causes great waste. Summary of the invention

[0007] The present invention provides a 3D printer heat chamber with variable space to solve a series of problems caused by chamber heating in large industrial 3D printers. To achieve the above purpose, the technical solution of the present invention is as follows.

[0008] A variable-space 3D printer heat chamber, comprising:

[0009] The printer body is used to carry all the components of the 3D printer.

[0010] A nozzle assembly, which is used to extrude consumables according to program instructions;

[0011] Printing workpiece, which is the workpiece printed by the printer;

[0012] A heat-insulating curtain installed on the upper side of the heat chamber to dynamically isolate the inner and outer spaces so that heat cannot be dissipated from the heat chamber;

[0013] A heated bed, which is used to carry the printed workpiece and firmly bond the printed workpiece;

[0014] A heater, which is mounted on the hot bed support and is used to heat the entire hot chamber;

[0015] A circulation fan is installed in the heat chamber and is used to circulate the air in the entire heat chamber so as to make the temperature at each position in the heat chamber uniform;

[0016] The heat insulation wall is composed of heat insulation material and shell, and is distributed in the front, back, left, right, bottom and bottom of the heat cavity and the bottom of the heat bed to isolate the heat cavity from the outside world and achieve the heat preservation effect;

[0017] The heated bed support is driven by the Z-axis motion system and is used to carry all components of the heated bed and the lower insulation wall of the heated bed.

[0018] As a further technical solution of the present invention, it also includes rollers, which are installed at both ends of the insulation wall under the hot bed to avoid friction between the insulation wall under the hot bed and the side insulation walls. At the same time, three rollers are arranged in the vertical direction to effectively avoid hot air leakage and achieve a sealing effect.

[0019] As a further technical solution of the present invention, the number of the circulation fans is at least two, and they are symmetrically arranged on both sides of the heat chamber.

[0020] Beneficial effects achieved by the present invention:

[0021] The present invention solves the problem of constant temperature of the heating chamber of existing large-scale 3D printers by introducing a 3D printer heat chamber with variable space. At the same time, by adjusting the size of the heat chamber space, the working state of the heater is dynamically adjusted to ensure heating needs while avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the overall structure of a 3D printer heat chamber with variable space.

[0023] Figure 2 A schematic diagram of the partial structure of a 3D printer heat chamber with variable space.

[0024] Figure 3 This is a schematic diagram of the structure of a variable-space 3D printer after the hot chamber and hot bed support move downward.

[0025] Notes on the figure numbers: 1-printer body, 2-nozzle assembly, 3-printing workpiece, 4-thermal insulation curtain, 5-heated bed, 6-heater, 7-circulating fan, 8-thermal insulation wall, 9-thermal insulation roller, 10-heated bed bracket. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is described in detail below in conjunction with the specific drawings.

[0027] See also Figures 1 to 3 , an embodiment of the present invention provides a 3D printer heat chamber with a variable space, including a printer body 1, a nozzle assembly 2, a printing workpiece 3, a heat insulation curtain 4, a heat bed 5, a heater 6, a circulating fan 7, a heat insulation wall 8, a heat insulation roller 9, and a heat bed bracket 10;

[0028] The printer body 1 is a large industrial 3D printer body, which is used to carry the installation of all parts of the 3D printer;

[0029] A nozzle assembly 2, which is used to extrude consumables according to program instructions;

[0030] Printing workpiece 3, which is the workpiece printed by the printer;

[0031] A heat-insulating curtain 4, which is installed on the upper side of the heat chamber and is used to dynamically isolate the inner and outer spaces so that heat cannot be dissipated from the heat chamber;

[0032] A heated bed 5, which is used to carry the printed workpiece 3 and firmly bond the printed workpiece 3;

[0033] A heater 6, which is mounted on the hot bed support 10 and is used to heat the entire hot chamber;

[0034] A circulation fan 7 is installed in the heat chamber and is used to circulate the air in the entire heat chamber, so as to make the temperature of each position in the heat chamber uniform; there are at least two circulation fans 7, which are symmetrically arranged on both sides of the heat chamber;

[0035] The heat insulation wall 8 is composed of a heat insulation material and a shell, and is distributed in the front, back, left, right, bottom and bottom of the heat chamber and the lower part of the heat bed 5, and is used to isolate the heat chamber from the outside to achieve a heat preservation effect;

[0036] Rollers 9 are installed at both ends of the heat insulation wall 8 under the hot bed to avoid friction between the heat insulation wall 8 under the hot bed and the side heat insulation wall 8. At the same time, three rollers 9 are arranged in the vertical direction to effectively prevent hot air leakage and achieve a sealing effect;

[0037] The heated bed support 10 is driven by the Z-axis motion system and is used to carry all components of the heated bed 5 and the lower insulation wall 8 of the heated bed.

[0038] When the 3D printer starts working, the hot bed 5 is at the top (i.e., the hot bed 5 is at zero position), therefore, the heat chamber space surrounded by the heat insulation wall 8 and the heat insulation curtain 4 is in the smallest state, and the heat chamber can quickly reach the set temperature through the heating of the heater 6 and the hot air circulation of the circulating fan 7. At this time, the heater 6 is in an intermittent working state, and the heater 6 works when the temperature is higher than the set temperature, and does not work when the temperature is lower than the set temperature.

[0039] Furthermore, when the printed workpiece 3 gradually rises, the hot bed support 10 moves downward driven by the Z-axis motion mechanism, and the heat chamber gradually increases. At this time, the working time of the heater 6 will gradually increase until the printing is completed.

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

[0041] ;

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

[0043] The power consumption required by the existing fixed heat chamber is ;

[0044] because Always much smaller than .

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

[0046] The present invention introduces a 3D printer heat chamber with variable space, adjusts the space size of the heat chamber, and dynamically adjusts the working state of the heater, thereby ensuring the heating demand and avoiding the waste of resources.

[0047] It should be noted that, in this article, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0048] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A 3D printer heat chamber with variable space, characterized in that: include; The printer body is used to carry all the components of the 3D printer. A nozzle assembly, which is used to extrude consumables according to program instructions; Printing workpiece, which is the workpiece printed by the printer; A heat-insulating curtain installed on the upper side of the heat chamber to dynamically isolate the inner and outer spaces so that heat cannot be dissipated from the heat chamber; A heated bed, which is used to carry the printed workpiece and firmly bond the printed workpiece; A heater, which is mounted on the hot bed support and is used to heat the entire hot chamber; A circulation fan is installed in the heat chamber and is used to circulate the air in the entire heat chamber so as to make the temperature at each position in the heat chamber uniform; The heat insulation wall is composed of heat insulation material and shell, and is distributed in the front, back, left, right, bottom and bottom of the heat cavity and the bottom of the heat bed to isolate the heat cavity from the outside world and achieve the heat preservation effect; The heated bed support is driven by the Z-axis motion system and is used to carry all components of the heated bed and the lower insulation wall of the heated bed.

2. The variable space 3D printer heat chamber according to claim 1, characterized in that: It also includes rollers, which are installed at both ends of the insulation wall under the hot bed to avoid friction between the insulation wall under the hot bed and the side insulation walls. At the same time, three rollers are arranged in the vertical direction to effectively avoid hot air leakage and achieve a sealing effect.

3. The variable space 3D printer heat chamber according to claim 1, characterized in that: The number of the circulation fans is at least two, and the circulation fans are symmetrically arranged on both sides of the heat chamber.

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