Z-axis rapid heating and cooling mechanism in 3D printing equipment
By adopting a dual cooling plate structure in 3D printing equipment, the work of the cooling plate is controlled according to the working stage, the problems of large heat loss and low efficiency of the traditional Z-axis temperature control mechanism are solved, and rapid cooling and efficient heat management are achieved.
Patent Information
- Application Number
- CN202422443965.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The Z-axis temperature control mechanism of traditional 3D printing equipment has problems of large heat loss and low efficiency during preheating, printing and cooling, and the heat insulation board cannot simultaneously block heat transfer and rapid cooling.
Using a dual cooling plate structure, the first cooling plate reduces heat transfer during preheating and printing, and the second cooling plate improves the cooling efficiency at the end of printing, and achieves rapid cooling by controlling the working stage of the cooling plate and the cold water flow rate.
It achieves efficient heat control in different working stages, reduces heat loss, improves preheating and cooling efficiency, and ensures printing accuracy and efficiency.
Smart Images
Figure CN223302220U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of 3D printing equipment, and in particular relates to a Z-axis rapid temperature rise and fall mechanism in a 3D printing equipment. Background Art
[0002] The Z-axis temperature control mechanism of traditional 3D printing equipment is assembled in sequence by the substrate, heating plate, heat insulation plate, cooling plate, etc. In the actual production process, there are the following shortcomings:
[0003] When the substrate is preheated before printing or during printing, the heating plate transfers heat to the substrate above, and also to the insulation plate and cooling plate below to prevent thermal deformation of the Z axis. This results in large heat loss, long heating time, and low work efficiency.
[0004] After printing is completed, when the parts are fished out, they need to be quickly heat exchanged through the cooling plate to cool the parts in the forming cylinder. However, most of the heat of the parts is transferred to the heating plate through the substrate, and then transferred to the insulation plate and cooling plate for cooling. The heat exchange efficiency is low and the cooling time is doubled.
[0005] In the above three processes, the heat insulation plate must not only block the downward transfer of heat to affect the Z-axis motion accuracy, but also quickly cool down to improve efficiency. The two cannot be achieved at the same time. Utility Model Content
[0006] The technical problem to be solved by the present invention is to provide a Z-axis rapid temperature rise and fall mechanism in a 3D printing device in response to the deficiencies of the above-mentioned prior art, so as to solve the problems raised in the above-mentioned background technology.
[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a Z-axis rapid temperature rise and fall mechanism in a 3D printing device, comprising a Z-axis lifting device, a cooling device, a heating plate and a substrate; a screw motor is arranged in a fixed bracket of the Z-axis lifting device, a screw is installed on the output shaft of the screw motor, and the outer side of the screw is threadedly connected to a forming frame; the heating plate is located on the bottom surface of the substrate and above the forming frame; the cooling device is placed on the peripheral side of the forming frame and below the heating plate; the cooling device comprises a first cooling plate and a second cooling plate, the first cooling plate is used to reduce the heat transfer efficiency from the heating plate to the forming frame before and during 3D printing to prevent deformation of the screw, and the second cooling plate is used to improve the cooling efficiency of the heating plate during the piece catching stage.
[0008] Preferably, the first cooling plate and the second cooling plate are nestable.
[0009] Preferably, cooling channels are provided in the first cooling plate and the second cooling plate, and a heating channel is provided in the heating plate.
[0010] Preferably, the first cooling plate is integrally connected to the top of the forming frame; the second cooling plate is installed on the top of the fixed bracket and is loosely fitted with the forming frame.
[0011] Preferably, the first cooling plate is integrally connected to the top of the forming frame; the second cooling plate is integrally connected to the heating plate and is located between the first cooling plate and the heating plate.
[0012] Preferably, a hollow portion is provided on the first cooling plate, and a second cooling plate boss is provided on the second cooling plate that can be nested and matched with the hollow portion; a plurality of first cooling plate bosses are provided on the upper surface of the first cooling plate, and the first cooling plate bosses are in contact with the heating plate to support the heating plate and form an air layer between the first cooling plate bosses and the heating plate in the non-boss area.
[0013] Preferably, a high temperature resistant rubber pad is provided on the upper surface of the second cooling plate boss.
[0014] Preferably, a groove is provided on the upper surface of the first cooling plate, which is nested with the groove of the second cooling plate of the integrated structure of the heating plate; a plurality of first cooling plate bosses are provided on the upper surface of the first cooling plate, the heating plate contacts the upper surface of the first cooling plate bosses, and an air layer is formed between the non-boss area of the first cooling plate bosses and the integrated structure of the heating plate and the second cooling plate.
[0015] Preferably, an electric heating wire or heating oil is provided in the heating channel of the heating plate.
[0016] The present invention also provides a method for using a Z-axis rapid temperature rise and fall mechanism in a 3D printing device, which is characterized in that the method comprises:
[0017] Before 3D printing, the forming frame is driven upward by the lead screw to move away from the fixed bracket end. During preheating, the first cooling plate and the heating plate are in operation, while the second cooling plate is inoperative. During 3D printing, the forming frame is driven downward by the lead screw to move the first cooling plate and the heating plate in operation, while the second cooling plate is inoperative.
[0018] When 3D printing is finished, the heating plate stops working and the first cooling plate and the second cooling plate start working.
[0019] Compared with the prior art, the present invention has the following advantages:
[0020] The utility model adopts a dual cooling plate structure in which a first cooling plate and a second cooling plate cooperate with each other. Different cooling plates are controlled to work according to different working stages of 3D printing, effectively preventing thermal deformation of the Z-axis while ensuring that heat loss can be effectively reduced during the stage where rapid heating / insulation (preheating / printing) is required. In the stage where rapid cooling is required (when fishing out parts), the first cooling plate and the second cooling plate work simultaneously and switch to high-flow cooling to increase heat exchange efficiency and quickly reduce the temperature of the heating plate and the formed parts. The temperature rising and falling mechanism of the utility model can achieve more efficient heating and cooling control, which is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;
[0022] Figure 2 Schematic diagram of the structure of the nested connection between the first cooling plate and the second cooling plate in Example 1 of the present invention; Schematic diagram of the connection relationship between the forming frame and the cooling device;
[0023] Figure 3 It is a structural diagram of embodiment 2 of the present utility model.
[0024] Figure 4 This is a schematic diagram of the connection structure of the first cooling plate, the second cooling plate and the heating plate in Example 2 of the present utility model;
[0025] Description of reference numerals:
[0026] 1-fixed bracket; 2-forming cylinder; 3-second cooling plate; 4-second cooling channel; 5-screw motor; 6-screw; 7-forming frame; 8-first cooling plate; 9-heating plate; 10-substrate; 11-first cooling channel; 12-heating channel; 13-first cooling plate boss; 15-groove; 16-hollow part; 17-second cooling plate boss. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0028] Example 1
[0029] like Figure 1-2As shown, this embodiment provides a Z-axis rapid temperature rise and fall mechanism in a 3D printing device, including a Z-axis lifting device, a cooling device, a heating plate 9 and a substrate 10; a screw motor 5 is provided in a fixed bracket 1 of the Z-axis lifting device, a screw 6 is installed on the output shaft of the screw motor 5, and the outer side of the screw 6 is threadedly connected to a forming frame 7; the heating plate 9 is located on the bottom surface of the substrate 10 and above the forming frame 7; the cooling device is placed on the side of the forming frame 7 and below the heating plate 9; a forming cylinder 2 is also fixed on the fixed bracket 1; the cooling device includes a first cooling plate 8 and a second cooling plate 3, the first cooling plate 8 is used to reduce the heat transfer efficiency of the heating plate 9 to the forming frame 7 before and during 3D printing, to prevent the screw 6 from deforming, thereby affecting the printing accuracy, and the second cooling plate 3 is used to improve the cooling efficiency of the heating plate 9 during the workpiece catching stage; a forming cylinder 2 is also fixed on the fixed bracket 1; the forming frame 7, the first cooling plate 8, the heating plate 9 and the substrate 10 constitute a forming platform, and the forming platform is arranged in the forming cylinder 2.
[0030] In this embodiment, the screw motor 5 drives the screw 6 to rotate, thereby controlling the forming frame 7 to drive the forming platform to rise and fall, that is, to control the rise and fall of the forming platform. Before 3D printing begins, the forming platform moves to the top of the forming cylinder 2, and during the printing process, it continues to descend until the printing is completed.
[0031] In this embodiment, a first cooling channel 11 is provided in the first cooling plate 8, a second cooling channel 4 is provided in the second cooling plate 3, and a heating channel 12 is provided in the heating plate 9. An electric heating wire or heating oil is provided in the heating channel 12 to preheat the substrate and keep it warm during printing.
[0032] Cooling method for the first cooling plate 8 and the second cooling plate 3: The first cooling channel 11 and the second cooling channel 4 are each connected to external water pipes to flow cold water for cooling. The external water pipes are equipped with solenoid valves or thermostats. By controlling the solenoid valves or thermostats, the flow and flow rate of the cold water are controlled, thereby controlling the operation and cooling efficiency of the first cooling plate 8 and the second cooling plate 3. The flow rate of the cold water can be increased or the temperature of the cold water can be reduced to achieve the purpose of more rapid reduction of the temperature of the heating plate and the formed part.
[0033] In this embodiment, the first cooling plate 8 is integrally connected to the top of the forming frame 7 ; the second cooling plate 3 is fixedly mounted on the top of the fixing bracket 1 and has a clearance fit with the forming frame 7 .
[0034] The first cooling plate 8 and the second cooling plate 3 can be nested and matched. Specifically, a hollow portion 16 is provided on the first cooling plate 8, and the second cooling plate 3 is provided with a second cooling plate boss 17 that can be nested and matched with the hollow portion 16. The upper surface of the first cooling plate 8 is provided with multiple first cooling plate bosses 13. The first cooling plate bosses 13 are in contact with the heating plate 9 to support the heating plate 9 and form an air layer with the heating plate 9 in the non-boss area; after the 3D printing is completed, the forming platform moves to the lowest position, and the first cooling plate 8 and the second cooling plate 3 are nested and matched, so that the second cooling plate 3 is in contact with the heating plate 9, and the contact surface is the upper surface of the second cooling plate boss 17, which is used to improve the cooling efficiency of the heating plate 9.
[0035] Specifically, if Figure 2 As shown, the second cooling plate bosses 17 are two symmetrically opened E-shaped bosses located on either side of the forming frame 7, matching the hollowed-out portion 16 on the first cooling plate 8. This is because the larger the contact area between the second cooling plate bosses 17 and the heating plate 9, the faster the heating plate 9 temperature can be lowered after printing, allowing for faster part extraction. A high-temperature resistant rubber pad is provided on the upper surface of the second cooling plate bosses 17 to prevent uneven contact surfaces that could reduce heat exchange efficiency. The thickness of the pad is set to 0.3-1.0 mm.
[0036] Specifically, if Figure 2 As shown, the number of the first cooling plate bosses 13 is 10, and the dimensions are 10-20 mm in length, 10-20 mm in width, and 5-10 mm in height. The layout of the first cooling plate bosses 13 is as follows: Figure 2 shown, but not limited to this approach.
[0037] In this embodiment, a sealing member is provided around the first cooling plate 8. The substrate 10 is connected to the heating plate 9 by bolts, and the heating plate 9 is connected to the first cooling plate 8 by bolts.
[0038] The method for using the Z-axis rapid temperature rise and fall mechanism in the 3D printing device of this embodiment is as follows:
[0039] Before 3D printing, the forming frame 7 is driven by the lead screw 6 to rise to the end away from the fixed bracket 1. During preheating, the first cooling plate 8 and the heating plate 9 are in operation, and the second cooling plate 3 is not in operation. The contact area between the first cooling plate 8 and the heating plate 9 is small, the heat loss of the heating plate 9 is small, and the preheating efficiency is the highest. During the 3D printing process, the forming frame 7 is continuously lowered by the lead screw 6, the first cooling plate 8 and the heating plate 9 are in operation, and the second cooling plate 3 is not in operation.
[0040] When 3D printing is finished, the heating plate 9 stops working, and the lead screw 6 drives the forming frame 7 to descend until the first cooling plate 8 contacts the second cooling plate 3. The first cooling plate 8 and the second cooling plate 3 work, and both the first cooling plate 8 and the second cooling plate 3 contact the heating plate 9. The area is increased to improve the heat exchange efficiency and the cooling efficiency.
[0041] Example 2
[0042] like Figure 3 and 4 As shown, this embodiment provides a Z-axis rapid temperature rise and fall mechanism in a 3D printing device, including a Z-axis lifting device, a cooling device, a heating plate 9 and a substrate 10; a screw motor 5 is provided in a fixed bracket 1 of the Z-axis lifting device, a screw 6 is installed on the output shaft of the screw motor 5, and the outer side of the screw 6 is threadedly connected to a forming frame 7; the heating plate 9 is located on the bottom surface of the substrate 10 and above the forming frame 7; the cooling device is placed on the side of the forming frame 7 and below the heating plate 9; a forming cylinder 2 is also fixed on the fixed bracket 1; the cooling device includes a first cooling plate 8 and a second cooling plate 3, the first cooling plate 8 is used to reduce the heat transfer efficiency of the heating plate 9 to the forming frame 7 before and during 3D printing to prevent deformation of the screw 6, and the second cooling plate 3 is used to improve the cooling efficiency of the heating plate 9 during the workpiece catching stage, and a forming cylinder 2 is also fixed on the fixed bracket 1; the forming frame 7, the first cooling plate 8, the second cooling plate 3, the heating plate 9 and the substrate 10 constitute a forming platform, which is arranged in the forming cylinder 2.
[0043] In this embodiment, the screw motor 5 drives the screw 6 to rotate, thereby controlling the forming frame 7 to drive the forming platform to rise and fall, that is, to control the rise and fall of the forming platform. Before 3D printing begins, the forming platform is at the top of the forming cylinder 2. During the printing process, it continues to descend until the printing is completed.
[0044] It should be noted that, Figure 3 The missing fixed bracket 1 and the screw motor 5 are the same as the fixed bracket 1 and the screw motor 5 of the temperature rise and fall mechanism in Example 1, and the connection method with other components is also the same, which can be referred to. Figure 1 .
[0045] In this embodiment, a first cooling channel 11 is provided in the first cooling plate 8, a second cooling channel 4 is provided in the second cooling plate 3, and a heating channel 12 is provided in the heating plate 9. An electric heating wire or heating oil is provided in the heating channel 12 to preheat the substrate and keep it warm during printing.
[0046] Cooling method for the first cooling plate 8 and the second cooling plate 3: The first cooling channel 4 and the second cooling channel 11 are each connected to external water pipes to flow cold water for cooling. The external water pipes are equipped with solenoid valves or thermostats. By controlling the solenoid valves or thermostats, the flow and flow rate of the cold water are controlled, thereby controlling the operation and cooling efficiency of the first cooling plate 8 and the second cooling plate 3. The flow rate of the cold water can be increased or the temperature of the cold water can be reduced to more quickly reduce the temperature of the heating plate and the formed part.
[0047] In this embodiment, the first cooling plate 8 is integrally connected to the top of the forming frame 7; the second cooling plate 3 is integrally connected to the heating plate 9 and is located between the first cooling plate 8 and the heating plate 9. Specifically, a groove 15 is provided on the upper surface of the first cooling plate 8, and the groove 15 is nested with the second cooling plate 3; a plurality of first cooling plate bosses 13 are provided on the upper surface of the first cooling plate 8, and the heating plate 9 contacts the upper surface of the first cooling plate bosses 13. An air layer is formed between the non-boss area of the first cooling plate bosses 13 and the integral structure of the heating plate 9 and the second cooling plate 3 to reduce heat diffusion.
[0048] In this embodiment, the number of the first cooling plate bosses 13 is 10, and the dimensions are 10-20 mm in length, 10-20 mm in width, and 5-10 mm in height. The layout of the first cooling plate bosses 13 is as follows: Figure 4 shown, but not limited to this approach.
[0049] Specifically, if Figure 4 As shown, the groove 15 is a square-shaped groove, and the side of the groove is the outer wall of the second cooling channel 11.
[0050] In this embodiment, a sealing member is installed around the second cooling plate 3. The substrate 10 is connected to the heating plate 9 by bolts, and the heating plate 9 is connected to the second cooling plate 3 by bolts.
[0051] The method for using the Z-axis rapid temperature rise and fall mechanism in the 3D printing device of this embodiment is as follows:
[0052] Before 3D printing, the forming frame 7 is driven to rise to the end away from the fixed bracket 1 by the screw 6. During preheating, the first cooling plate 8 and the heating plate 9 are in operation, and the second cooling plate 3 is not in operation. The contact area between the first cooling plate 8 and the heating plate 9 is small, the heat loss of the heating plate 9 is small, and the preheating efficiency is the highest. During the 3D printing process, the forming frame 7 is continuously lowered by the screw 6, the first cooling plate 8 and the heating plate 9 continue to work, and the second cooling plate 3 is not in operation.
[0053] When 3D printing is finished, the heating plate 9 stops working, and the first cooling plate 8 and the second cooling plate 3 start working. The first cooling plate 8 and the second cooling plate 3 are both in contact with the heating plate 9, and the area is increased to improve the heat exchange efficiency and the cooling efficiency.
[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0055] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A Z-axis rapid temperature rise and fall mechanism in a 3D printing device, characterized in that: It includes a Z-axis lifting device, a cooling device, a heating plate (9) and a substrate (10); A screw motor (5) is provided in the fixed bracket (1) of the Z-axis lifting device, a screw (6) is installed on the output shaft of the screw motor (5), and the outer side of the screw (6) is threadedly connected to the forming frame (7); the heating plate (9) is located on the bottom surface of the base material (10) and above the forming frame (7); the cooling device is placed on the peripheral side of the forming frame (7) and below the heating plate (9); a forming cylinder (2) is also fixed on the fixed bracket (1); The cooling device comprises a first cooling plate (8) and a second cooling plate (3), wherein the first cooling plate (8) is used to reduce the heat transfer efficiency of the heating plate (9) to the forming frame (7) before and during 3D printing to prevent the lead screw (6) from deforming, and the second cooling plate (3) is used to improve the cooling efficiency of the heating plate (9) during the workpiece catching stage; The first cooling plate (8) is integrally connected to the top of the forming frame (7); the first cooling plate (8) and the second cooling plate (3) can be nested and matched.
2. The Z-axis rapid temperature rise and fall mechanism in a 3D printing device according to claim 1, characterized in that: The second cooling plate (3) is fixedly mounted on the top of the fixed bracket (1) and is clearance-matched with the forming frame (7).
3. The Z-axis rapid temperature rise and fall mechanism in a 3D printing device according to claim 1, characterized in that: The second cooling plate (3) is integrally connected to the heating plate (9) and is located between the first cooling plate (8) and the heating plate (9).
4. The Z-axis rapid temperature rise and fall mechanism in a 3D printing device according to claim 2, characterized in that: The first cooling plate (8) is provided with a hollow portion (16), and the second cooling plate (3) is provided with a second cooling plate boss (17) that can be nested and matched with the hollow portion (16); a plurality of first cooling plate bosses (13) are provided on the upper surface of the first cooling plate (8), and the first cooling plate bosses (13) are in contact with the heating plate (9) to support the heating plate (9) and form an air layer between the first cooling plate bosses (13) and the heating plate (9) in the non-boss area.
5. The Z-axis rapid temperature rise and fall mechanism in a 3D printing device according to claim 4, characterized in that: A high-temperature resistant rubber pad is provided on the upper surface of the second cooling plate boss (17).
6. The Z-axis rapid temperature rise and fall mechanism in a 3D printing device according to claim 3, characterized in that: A groove (15) is provided on the upper surface of the first cooling plate (8), and the groove (15) is nested with the second cooling plate (3) of the integral structure with the heating plate (9); a plurality of first cooling plate bosses (13) are provided on the upper surface of the first cooling plate (8), and the heating plate (9) contacts the upper surface of the first cooling plate bosses (13), and an air layer is formed between the non-boss area of the first cooling plate bosses (13) and the integral structure of the heating plate (9) and the second cooling plate (3).
7. A Z-axis rapid temperature rise and fall mechanism in a 3D printing device according to any one of claims 1 to 6, characterized in that: Cooling channels are provided in the first cooling plate (8) and the second cooling plate (3), and a heating channel is provided in the heating plate (9).
8. The Z-axis rapid temperature rise and fall mechanism in a 3D printing device according to claim 7, characterized in that: An electric heating wire or heating oil is provided in the heating channel of the heating plate (9).