3D printing equipment with automatic demolding function

Abstract

The invention relates to the technical field of 3D printing, in particular to 3D printing equipment with an automatic demolding function. The 3D printer comprises a basic frame and a 3D printing mechanism arranged at the end of the basic frame, and a forming platform corresponding to the 3D printing mechanism is arranged on the inner side of the basic frame. When the sliding inner table slides outwards, the arc edge of the extrusion block is matched with the edge extrusion base plate, the shoveling gasket is driven to be stably lifted, the lifted shoveling gasket is attached to the top face of the sliding inner table, and shoveling of the bottom end of the model is completed along with continuous outward movement of the sliding inner table; the lower mold protection cushion can be controlled to be attached to the shoveling piece to support the shoveling position of the bottom end of the model, and when the model is shoveled to incline, the main body of the model can be supported through the upper mold protection cushion, so that differentiated flexible support and protection are provided for the bonding position and the main body part of the model, lossless and efficient demolding of the model is achieved, and the production efficiency is improved. The problem that a traditional shovel die is prone to inclination and damage is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and particularly to a 3D printing device with an automatic demolding function. Background Art

[0002] 3D printing is a technology for manufacturing solid parts by the method of layer-by-layer material accumulation based on three-dimensional CAD data.

[0003] Currently, in 3D printing, since most models are formed on a modeling platform, the printing head is controlled by a control system to complete modeling on the modeling platform, and then the model is taken off.

[0004] After 3D printing is completed, since some of the materials used for the model are sticky, during printing, the bottom part of the model will stick to the platform. When demolding such models after forming, it is necessary to manually shovel the bottom of the model or shake the model to break the adhesion between the bottom of the model and the platform, which is not only inefficient but also likely to cause the model to tilt and be damaged. Summary of the Invention

[0005] The present invention provides a 3D printing device with an automatic demolding function, which can, through an automatic demolding structure, help shovel the adhesion between the bottom of the model and the platform as a whole, and enable the model to quickly separate from the platform to complete demolding, thereby solving the problems raised in the above background art, that is:

[0006] For some models using sticky materials, the bottom of the model will stick to the modeling platform, and it is necessary to manually shovel the bottom of the model or shake the model to break the adhesion between the bottom of the model and the platform, which is not only inefficient but also likely to cause the model to tilt and be damaged.

[0007] To achieve the above object, the present invention provides a 3D printing device with an automatic demolding function, including a basic frame and a three-dimensional printing mechanism arranged at the end of the basic frame. An forming platform corresponding to the three-dimensional printing mechanism is arranged inside the basic frame. The forming platform includes a sliding platform on the upper layer and a fixed base on the lower layer. It further includes a pushing component, a squeezing lifting frame and a shoveling gasket. The pushing component is arranged on the fixed base, and the pushing end of the pushing component is connected to the sliding end of the sliding platform, so as to control the side shift of the sliding end of the sliding platform.

[0008] The sliding platform includes an edge platform and a sliding inner platform. The edge platform is fixedly arranged above the fixed base platform. The edge platform is a concave platform, and the notch of the edge platform faces one side of the basic frame. The sliding inner platform is movably inserted along the inner concave part of the edge platform. The pushing component is an electric push rod driven by electricity, and the pushing end is connected to the sliding inner platform, so that the sliding inner platform can be pushed to slide outwards along the opening of the edge platform to the side close to the basic frame. The extrusion lifting frame is arranged at the opening of the edge platform;

[0009] Extrusion blocks flush with the top surface of the sliding inner platform are arranged on both sides of the sliding inner platform. The edges of the extrusion blocks are arc-shaped, and the rear sections are horizontal. The extrusion lifting frame includes edge extrusion backing plates that protrude upwards obliquely and a pulling-down member. Extrusion blocks that fit against the edge platform are arranged on both sides of the sliding inner platform. The pulling-down member is arranged at the two side corners of the opening of the edge platform. The edge extrusion backing plates are arranged at the ends of the pulling-down member, and the two edge extrusion backing plates are respectively located on the moving paths of the extrusion blocks on both sides of the sliding inner platform. A shoveling gasket is arranged between the two edge extrusion backing plates, and the shoveling end of the shoveling gasket coincides with the bottommost surface of the edge extrusion backing plate, so that when the extrusion block slides, it forms a progressive contact with the edge extrusion backing plate, can slide along the inclined surface of the edge extrusion backing plate and under the edge extrusion backing plate, and supports the edge extrusion backing plate and the shoveling gasket. Under the pulling of the pulling-down member, the edge extrusion backing plate fits against the extrusion block, and the shoveling gasket fits against the surface of the sliding inner platform, so as to shovel the sliding inner platform by using the shoveling gasket.

[0010] In this technical solution, through the cooperation of the arc edges of the extrusion blocks and the edge extrusion backing plates, the stable lifting of the shoveling gasket is realized, and the lifted shoveling gasket fits against the top surface of the sliding inner platform. As the sliding inner platform continues to move outwards, the shoveling of the bottom end of the model is completed.

[0011] As a further improvement of this technical solution, the shoveling structure further includes a mold protection component. The mold protection component is arranged on one side of the fixed base platform and faces the upper part of the sliding inner platform;

[0012] The shoveling gasket includes a shoveling piece and a horizontal piece. The part of the shoveling piece faces the sliding inner platform. The horizontal piece is arranged behind the shoveling piece. A micro-vibration member is arranged below the horizontal piece, and a vibration connecting member connecting to the basic frame is arranged at the part of the horizontal piece close to the basic frame. The vibration connecting member includes a positioning cross plate and a connecting spring. The positioning cross plate is arranged on the basic frame. The connecting spring connects the positioning cross plate and the horizontal piece to absorb vibration energy and maintain the stability of the system, so that the micro-vibration member can drive the shoveling piece and the horizontal piece to generate small vibrations, so that the shoveling piece can shovel the model better. After the shoveling piece shovels the model on the top surface of the sliding inner platform, under the pushing of the mold protection component, the model slides onto the horizontal piece.

[0013] In this technical solution, the micro-vibrating part is combined with the vibration connecting part with elastic connection, which can reduce mechanical impact while improving the shoveling efficiency of the shoveling gasket.

[0014] As a further improvement of this technical solution, two mold protection assemblies are stacked on one side of the fixed base. The mold protection assembly includes a control part and a mold protection soft pad. The control part is arranged on one side of the fixed base. Two control parts are in a group. The mold protection soft pad is connected to the output ends of the two control parts, and the moving path of the mold protection soft pad is the same as that of the sliding inner table. The control part controls the mold protection soft pad to move forward. The width of the lower mold protection soft pad is smaller than that of the upper mold protection soft pad. The horizontal position of the lower mold protection soft pad is close to the bonding part of the model on the sliding inner table, and the horizontal position of the upper mold protection soft pad is close to the main body part of the model.

[0015] On this basis, the mold protection soft pad includes an outer layer, a middle layer and an inner layer arranged in sequence. The outer layer is a silica gel layer, the middle layer is an air pressure cavity, and the inner layer is a connecting sleeve layer and is connected to the control end of the control part.

[0016] In this technical solution, the double-layer mold protection soft pad can provide differential flexible support for different parts of the model, such as the bonding part and the main body part. During the process of the shoveling piece shoveling the bottom end of the model, the lower mold protection soft pad can be used to support and protect the shoveling position of the model. When the model shoveling is tilted, the upper mold protection soft pad can support the main body of the model. After the shoveling is completed, the upper mold protection soft pad can also be used to push the model to make the model slide onto the horizontal piece.

[0017] Compared with the prior art, the present invention provides a 3D printing device with an automatic demolding function, which has the following beneficial effects:

[0018] In the present invention, when the sliding inner table slides outwards, the cooperation between the arc edge of the extrusion block and the edge extrusion backing plate drives the shoveling gasket to lift smoothly, and the lifted shoveling gasket fits the top surface of the sliding inner table. As the sliding inner table continues to move outwards, the bottom end of the model is shoveled. During shoveling, the lower mold protection soft pad can be controlled to fit the shoveling piece to support the shoveling position of the bottom end of the model. When the model shoveling is tilted, the upper mold protection soft pad can support the main body of the model. And after the shoveling is completed, the upper mold protection soft pad can also be used to push the model to make the model slide onto the horizontal piece, so as to provide differential flexible support and protection for the bonding part and the main body part of the model, realize the lossless and efficient demolding of the model, and solve the problem that the traditional shoveling mold is prone to tilt and damage.

[0019] In addition, when the micro-vibrating part is combined with the vibration connecting part with elastic connection, it can provide micro-vibration for the shoveling gasket during shoveling, which can increase the adhesion force between the model and the platform during the shoveling process, reduce mechanical impact while improving the shoveling efficiency of the shoveling gasket. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a side view of the overall structure of the present invention;

[0022] Figure 3 is a schematic diagram of the structural distribution of the forming platform, shoveling gasket and mold protection component in the present invention;

[0023] Figure 4 is Figure 3 an enlarged view of the structure at position A in

[0024] Figure 5 is a side view of the structural distribution of the forming platform, shoveling gasket and mold protection component in the present invention;

[0025] Figure 6 is Figure 5 an enlarged view of the structure at position B in

[0026] Figure 7 is a schematic diagram of the internal structure of the mold protection soft pad in the present invention;

[0027] Figure 8 is a schematic diagram of the position of the micro-vibration member below the horizontal plate in the present invention;

[0028] Figure 9 is a schematic diagram of the structure when the mold protection soft pad pushes the mold and the shoveling gasket shovels in the present invention;

[0029] Figure 10 is a schematic diagram of the structure when the upper mold protection soft pad pushes the mold above the horizontal plate in the present invention.

[0030] In the figures: 1. Basic frame; 2. Forming platform; 21. Sliding platform; 211. Edge platform; 212. Sliding inner table; 213. Extrusion block; 22. Fixed bottom table; 3. Pushing component; 4. Extrusion lifting frame; 41. Edge extrusion backing plate; 42. Pull-down member; 5. Shoveling gasket; 51. Shoveling piece; 52. Horizontal plate; 521. Micro-vibration member; 6. Mold protection component; 61. Control member; 62. Mold protection soft pad; 621. Outer layer; 622. Intermediate layer; 623. Inner layer; 7. Vibration connecting piece; 71. Positioning cross plate; 72. Connecting spring. Detailed Description of the Invention

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Refer to Figure 1 、 Figure 2 and Figure 3 , the present invention provides a 3D printing device with an automatic demolding function. In order to be able to shovel the model on the modeling platform as a whole and prevent the model from tilting and being damaged during shoveling to complete rapid demolding, a base frame 1 and a three-dimensional printing mechanism arranged at the end of the base frame 1 are provided here. A forming platform 2 corresponding to the three-dimensional printing mechanism is arranged inside the base frame 1. The forming platform 2 includes a sliding platform 21 on the upper layer and a fixed base 22 on the lower layer. It also includes a pushing component 3 and a shoveling structure. The pushing component 3 is arranged on the fixed base 22, and the pushing end of the pushing component 3 is connected to the sliding end of the sliding platform 21, so as to be able to control the side shift of the sliding end of the sliding platform 21;

[0033] The shoveling structure includes an extrusion lifting frame 4 and a shoveling gasket 5.

[0034] As Figure 3 、 Figure 9 and Figure 10 shown, the sliding platform 21 includes an edge platform 211 and a sliding inner platform 212. The edge platform 211 is fixedly arranged above the fixed base 22. The edge platform 211 is a concave platform, and the notch of the edge platform 211 faces one side of the base frame 1. The sliding inner platform 212 is movably inserted in the inner concave part of the edge platform 211, and the pushing component 3 acts on the sliding inner platform 212. The extrusion lifting frame 4 is arranged at the opening of the edge platform 211;

[0035] As Figure 2 shown, the pushing component 3 is an electric push rod driven by electricity, and the pushing end is connected to the sliding inner platform 212, so as to be able to push the sliding inner platform 212 to slide out along the opening of the edge platform 211 to the side close to the base frame 1.

[0036] Extrusion blocks 213 flush with the top surface of the sliding inner platform 212 are arranged on both sides of the sliding inner platform 212.

[0037] As Figure 9As shown in the figure, the extrusion lifting frame 4 includes an edge extrusion backing plate 41 and a pulling member 42. Extrusion blocks 213 that fit against the edge platforms 211 are provided on both sides of the sliding inner platform 212. The pulling member 42 is provided at the two side corners of the opening of the edge platform 211. The edge extrusion backing plate 41 is provided at the end of the pulling member 42, and the two edge extrusion backing plates 41 are respectively located on the moving paths of the extrusion blocks 213 on both sides of the sliding inner platform 212. The shoveling gasket 5 is provided between the two edge extrusion backing plates 41, and the shoveling end of the shoveling gasket 5 coincides with the bottommost surface of the edge extrusion backing plate 41. When the sliding inner platform 212 slides outwards, the extrusion block 213 will squeeze the edge extrusion backing plate 41 upwards. At this time, under the pulling of the pulling member 42, the edge extrusion backing plate 41 fits against the extrusion block 213, and the shoveling gasket 5 fits against the surface of the sliding inner platform 212, so as to shovel the sliding inner platform 212 by using the shoveling gasket 5.

[0038] In addition, the pulling member 42 is an elastic reset structure. When the sliding inner platform 212 resets, the pulling member 42 can drive the edge extrusion backing plate 41 and the shoveling gasket 5 to return to their initial positions.

[0039] Among them, as Figure 5 and Figure 6 shown in the figure, the edge extrusion backing plate 41 is inclined and convex upwards. The edge of the extrusion block 213 is an arc edge, and the rear section remains horizontal, so that the extrusion block 213 forms a progressive contact with the edge extrusion backing plate 41 during sliding, and can better slide along the inclined surface of the edge extrusion backing plate 41 and under the edge extrusion backing plate 41, and support the edge extrusion backing plate 41 and the shoveling gasket 5.

[0040] Through the cooperation of the arc edge of the extrusion block 213 and the edge extrusion backing plate 41, the smooth lifting of the shoveling gasket 5 is realized.

[0041] The shoveling structure further includes a mold protection component 6. The mold protection component 6 is provided on one side of the fixed base 22, and the mold protection component 6 faces directly above the sliding inner platform 212.

[0042] The shoveling gasket 5 includes a shoveling piece 51 and a horizontal piece 52. A part of the shoveling piece 51 faces directly the sliding inner platform 212. The horizontal piece 52 is provided behind the shoveling piece 51, so that after the shoveling piece 51 shovels the model on the top surface of the sliding inner platform 212, under the pushing of the mold protection component 6, the model slides onto the horizontal piece 52.

[0043] As Figure 8 shown in the figure, a micro-vibrating member 521 is provided below the horizontal piece 52, and a vibration connecting member 7 connecting to the base frame 1 is provided at the part of the horizontal piece 52 close to the base frame 1. As Figure 4As shown, the vibration connecting member 7 includes a positioning cross plate 71 and a connecting spring 72. The positioning cross plate 71 is arranged on the basic frame 1. The connecting spring 72 connects the positioning cross plate 71 and the horizontal piece 52. The connecting spring 72 absorbs vibration energy and maintains the stability of the system, enabling the micro-vibration member 521 to drive the shoveling piece 51 and the horizontal piece 52 to generate tiny vibrations, so that the shoveling piece 51 can shovel the model better.

[0044] The micro-vibration member 521 is combined with the vibration connecting member 7 with elastic connection, which improves the shoveling efficiency of the shoveling gasket 5 while reducing mechanical shock.

[0045] The mold protection assembly 6 includes a control member 61 and a mold protection soft pad 62. The control member 61 is arranged on one side of the fixed base 22. Two control members 61 are in a group. The mold protection soft pad 62 is connected to the output ends of the two control members 61, and the moving path of the mold protection soft pad 62 is the same as that of the sliding inner table 212. By controlling the control member 61 to move the mold protection soft pad 62 forward, when the sliding inner table 212 slides outwards and the shoveling gasket 5 shovels the bottom end of the model, the mold protection soft pad 62 can fit the other side of the model to form protection for the model.

[0046] As Figure 3 、 Figure 9 and Figure 10 shown, two mold protection assemblies 6 are stacked (arranged vertically) on one side of the fixed base 22, and the width of the lower mold protection soft pad 62 is smaller than that of the upper mold protection soft pad 62. The horizontal position of the lower mold protection soft pad 62 is close to the bonding part of the model on the sliding inner table 212, while the horizontal position of the upper mold protection soft pad 62 is close to the main body part of the model. During the process of the shoveling piece 51 shoveling the bottom end of the model, the lower mold protection soft pad 62 can be used to support and protect the shoveling position of the model. When the model tilts during shoveling, the upper mold protection soft pad 62 can support the main body of the model. After shoveling is completed, the upper mold protection soft pad 62 can also be used to push the model to slide onto the horizontal piece 52.

[0047] The double-layer mold protection soft pad 62 can provide differential flexible support for different parts of the model, such as the bonding part and the main body part.

[0048] As Figure 7 shown, the mold protection soft pad 62 includes an outer layer 621, an intermediate layer 622 and an inner layer 623 arranged in sequence. The outer layer 621 is a silicone layer, the intermediate layer 622 is a pneumatic cavity, and the inner layer 623 is a connecting sleeve layer and is connected to the control end of the control member 61.

[0049] Working principle: Through the three-dimensional printing mechanism at the end of the basic frame 1, the model is first printed and formed on the sliding inner table 212. After the model is formed, the sliding inner table 212 is in the initial embedded state within the edge platform 211. Then, the pushing component 3 is activated to push the sliding inner table 212 to slide outward along the notch of the edge platform 211. The extrusion blocks 213 on both sides of the sliding inner table 212 move synchronously. The extrusion blocks 213 gradually come into contact with the edge extrusion backing plate 41 with an inclined design. Constrained by the pulling-down part 42, the edge extrusion backing plate 41 and the shoveling gasket 5 are lifted. At this time, the shoveling piece 51 will insert into the gap between the top surface of the sliding inner table 212 and the bottom of the model to complete the shoveling process. In addition, the double-layer mold protection component 6 acts synchronously. By the control part 61 of the lower layer, the mold protection soft pad 62 of the lower layer is pushed forward to control the mold protection soft pad 62 of the lower layer to be close to the bonding part between the model and the platform, preventing tearing at the bottom during shoveling. It can also push forward the mold protection soft pad 62 of the upper layer through the control part 61 of the upper layer. Using the outer layer 621 and the intermediate layer 622 of the mold protection soft pad 62, it flexibly fits the main body of the model to prevent the model from tilting when being shoveled and entering above the shoveling gasket 5. During the process, the micro-vibration part 521 works, and transmits high-frequency micro-vibrations to the shoveling piece 51 through the horizontal piece 52 to break the adhesion between the model and the platform during the shoveling process. When the shoveling piece 51 completes the shoveling, the model detaches from the sliding inner table 212. At this time, the sliding inner table 212 continues to move forward, and the upper-layer mold protection soft pad 62 continues to be pushed forward to guide the model to the horizontal bearing surface of the horizontal piece 52 to complete the lower mold.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printing device with an automatic demoulding function, comprising a basic frame (1) and a three-dimensional printing mechanism arranged at the end of the basic frame (1), characterized in that: Further included are: A forming platform (2), the forming platform (2) includes a fixedly arranged edge platform (211) and a sliding inner platform (212) slidably mounted on the edge platform (211), and extrusion blocks (213) are provided on both sides of the sliding inner platform (212); A shoveling structure, the shoveling structure includes an edge extrusion backing plate (41) and a shoveling gasket (5) located on the moving path of the extrusion block (213), the shoveling gasket (5) is connected to the edge extrusion backing plate (41), when the sliding inner platform (212) slides outwards, the extrusion block (213) contacts the edge extrusion backing plate (41) and jacks up the shoveling gasket (5), so that the shoveling gasket (5) is inserted into the gap between the top surface of the sliding inner platform (212) and the bottom of the model to complete shoveling and detachment; Also included are two groups of mold protection components (6) distributed vertically, the mold protection components (6) include a control member (61) and a mold protection soft pad (62) connected to the output end of the control member (61), and the moving paths of the stacked mold protection soft pads (62) respectively correspond to the main body and the bottom end of the model on the sliding inner platform (212), and are used to provide flexible support by fitting the side of the model during the shoveling and detachment process.

2. The 3D printing device with an automatic demoulding function according to claim 1, wherein, The shoveling structure further includes an extrusion lifting frame (4), the extrusion lifting frame (4) includes a pulling-down member (42), the extrusion block (213) is flush with the top surface of the sliding inner platform (212), the pulling-down member (42) is fixed at the corners of both sides of the opening of the edge platform (211), edge extrusion backing plates (41) are provided at the ends of the two pulling-down members (42), and the two edge extrusion backing plates (41) are respectively located on the moving paths of the extrusion blocks (213) on both sides of the sliding inner platform (212); The shoveling gasket (5) is arranged between the two edge extrusion backing plates (41), and its shoveling end is flush with the bottom surface of the edge extrusion backing plate (41).

3. The 3D printing device with an automatic demoulding function according to claim 2, characterized in that, The shoveling gasket (5) includes a shoveling piece (51) and a horizontal piece (52), the shoveling piece (51) is located between the two edge extrusion backing plates (41) and is used to shovel the bottom of the model, and the horizontal piece (52) is arranged behind the shoveling piece (51) and is used to receive the model after demolding; Wherein, a micro-vibration member (521) is provided below the horizontal piece (52), and the horizontal piece (52) is elastically connected to the base frame (1) through a vibration connecting member (7).

4. The 3D printing device with an automatic demoulding function according to claim 3, characterized in that, The vibration connecting member (7) includes a positioning cross plate (71) fixed on the base frame (1) and a connecting spring (72) connecting the positioning cross plate (71) and the horizontal piece (52), and is used to absorb the vibration energy generated by the micro-vibration member (521).

5. The 3D printing device with an automatic demoulding function according to claim 3, wherein, The pulling-down member (42) is an elastic reset structure.

6. The 3D printing device with an automatic demolding function according to claim 1, wherein, The width of the lower mold protection soft pad (62) is smaller than that of the upper mold protection soft pad (62), and the horizontal position of the lower layer mold protection soft pad (62) is close to the bonding part of the model and the sliding inner platform (212), and the horizontal position of the upper layer mold protection soft pad (62) is close to the main body part of the model.

7. The 3D printing device with an automatic demoulding function according to claim 6, characterized in that, The mold protection soft pad (62) includes an outer layer (621), an intermediate layer (622) and an inner layer (623) arranged in sequence from outside to inside; Wherein, the outer layer (621) is a silica gel layer, the intermediate layer (622) is a pneumatic cavity, and the inner layer (623) is a sleeve structure connected to the control member (61).

8. The 3D printing device with an automatic demoulding function according to claim 1, characterized in that, The forming platform (2) includes a sliding platform (21) and a fixed base (22) arranged below the sliding platform (21). The sliding platform (21) includes an edge platform (211), a sliding inner platform (212), and an extrusion block (213). The fixed base (22) is fixedly arranged inside the basic frame (1). The edge platform (211) is fixedly arranged above the fixed base (22). The edge platform (211) is of a concave structure, and its opening side faces the basic frame (1). The sliding inner platform (212) is movably inserted into the concave portion of the edge platform (211). A pushing component (3) is arranged on the fixed base (22), and the output end of the pushing component (3) is connected to the sliding inner platform (212) for driving the sliding inner platform (212) to slide along the opening direction of the edge platform (211).

9. The 3D printing device with an automatic demoulding function according to claim 8, characterized in that, The pushing component (3) is an electric push rod. The edges of the extrusion blocks (213) on both sides of the sliding inner platform (212) are arc-shaped, and the rear section remains horizontal. The side of the edge extrusion backing plate (41) facing the extrusion block (213) is inclined and convex upward, forming a progressive contact with the arc edge of the extrusion block (213).

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