A large-size, anti-warping, easy-to-remove 3D printing flexible base plate and a method of using the same

Abstract

The present invention discloses a large-size 3D printing flexible base plate with anti-warping and easy-to-take parts and a method of using the same. The printing base plate is loaded with a solidified flexible colloid in a container, and printing material particles are laid on the surface of the solidified flexible colloid, and an additive manufacturing process is performed on the printing material particles. The entire printing base plate does not need to be heated, which is energy-saving and environmentally friendly; the surface material of the base plate and the printing material are the same material, and the surface particles have a good bonding effect with the molten surface material; after printing, it is easy to take out the parts; the substrate can be repeatedly repaired and used, and the cost is low; it can be shaped according to the workpiece 4, and material waste is avoided to the maximum extent; the base plate is composited with a variety of materials, and the surface material of the base plate is the same raw material as the printing material to meet the needs of materials with different printing temperatures; the flexible base plate helps to release internal stress during printing and can effectively prevent cracking caused by stress concentration.

Description

[Technical field]

[0001] The present invention belongs to the technical field of 3D printing, and in particular relates to a large-size, warping-resistant, and easy-to-remove 3D printing flexible base plate and a method for using the same. [Background technology]

[0002] Fused deposition modeling (FDM) is a widely used polymer 3D printing technology. In this additive manufacturing technology, plastic polymers are heated and melted to accumulate and adhere to the predetermined printing position in the form of a melt. The printed product is finally formed by the melt stacking and bonding layer by layer.

[0003] During this process, the polymer will shrink and deform during cooling and hardening. Due to the different temperatures and uneven shapes of various parts during the printing process, the shrinkage and deformation will be asynchronous and uneven. When the shrinkage and deformation inside the printed part is greater than the bonding force between the printed part and the base, the part will partially fall off the printing base and warp.

[0004] The larger the product size, the more obvious the warping. The warped product may even interfere with the movement of the printer nozzle, causing printing to be unable to continue. This makes the application of FDM technology in the rapid prototyping of large-size parts difficult and hinders the promotion and application of FDM technology.

[0005] To this end, technicians generally use methods such as laying high-temperature resistant plastic film on the printing base, brushing water-soluble glue, and increasing the heating temperature of the printing base to suppress the occurrence of warping deformation. However, these measures are effective for small-sized workpieces or materials with low shrinkage rates, but have limited effects on large-sized parts (molding size greater than 2m) or materials with large shrinkage deformation; existing base plates basically rely on bottom heating to improve the adhesion between the workpiece and the base plate and reduce deformation. The heating temperature is generally better near the glass transition temperature of the material. This method is easier to implement for small-sized materials with low glass transition temperatures, but with the increase in workpiece size and the printing requirements of some high-temperature resistant materials, heating the base plate to a suitable temperature requires huge power consumption and the effect is average. [Summary of the invention]

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a large-size 3D printing flexible base plate that is anti-warping and easy to remove parts and a method of using the same; so as to solve the technical problem in the prior art that large-size parts shrink and deform significantly during the printing process.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A large-size, anti-warping, easy-to-remove 3D printing flexible base plate, characterized in that it comprises: a container, wherein a solidified flexible colloid is loaded in the container, printing material particles are laid on the surface of the solidified flexible colloid, a part of the printing material particles is in the flexible colloid, and the printing material particles are made of the same material as the workpiece;

[0009] The lower surface of the workpiece is covered by the upper surface of the solidified flexible colloid.

[0010] A further improvement of the present invention is:

[0011] Preferably, the container is made of wood.

[0012] Preferably, the wood material is pine board, wood board or European pine board.

[0013] Preferably, the flexible colloid is white latex, epoxy-based adhesive or phenolic-based adhesive.

[0014] Preferably, the flexible colloid is filled with fillers.

[0015] Preferably, the filler is an inorganic filler or elastic particles.

[0016] A method for using a large-size, warping-resistant, and easy-to-remove 3D printing flexible base plate comprises the following steps:

[0017] Step 1, making a container;

[0018] Step 2, filling the container with a flexible colloid, and solidifying the flexible colloid;

[0019] Step 3, laying printing material particles on the flexible colloid;

[0020] Step 4, printing the target workpiece on the printing material particles;

[0021] Step 5: Separate the workpiece and the flexible colloid to complete the entire printing process.

[0022] Preferably, in step 2, the flexible colloid is added to the container in batches, and before each addition, the next layer of flexible colloid is added after the previous layer of flexible colloid is solidified.

[0023] Preferably, in step 3, the printing material particles are laid before the last layer of the flexible colloid is completely solidified, and part of the printing material particles are in the flexible colloid.

[0024] Preferably, in step 5, after the workpiece and the flexible colloid are separated, the flexible colloid and the printing material particles are re-laid on the surface of the flexible colloid from which the workpiece is removed.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention discloses a large-size 3D printing flexible base plate that is anti-warping and easy to take out. The printing base plate is loaded with a solidified flexible colloid in a container, and printing material particles are laid on the surface of the solidified flexible colloid, and additive manufacturing is performed on the printing material particles. The entire printing base plate does not need to be heated, which is energy-saving and environmentally friendly; the surface material of the base plate and the printing material are the same material, and the surface particles have a good bonding effect with the molten surface material; after printing is completed, the printed part is directly removed from the flexible colloid, which is convenient for taking out; the base plate can be repeatedly repaired and used, and the cost is low; it can be changed according to the shape of the workpiece to avoid material waste to the greatest extent; the base plate is composited with a variety of materials, and the surface material of the base plate is the same raw material as the printing material to meet the needs of materials with different printing temperatures; the flexible base plate helps to release internal stress during printing and can effectively prevent cracking caused by stress concentration.

[0027] Furthermore, the container is made of wood material, which is cheap, easy to obtain and easy to process.

[0028] Furthermore, the flexible colloid is selected from white latex, epoxy-based adhesive or phenolic-based adhesive, and such colloid is a thermoplastic adhesive or thermosetting adhesive with good bonding effect.

[0029] Furthermore, the flexible colloid is filled with fillers, so that the rigidity of the flexible colloid can be adjusted.

[0030] The present invention also discloses a method for using a large-size, warping-resistant, and easy-to-remove 3D printing flexible base plate, which first prepares a container according to the shape of the target workpiece, then fills the container with a flexible colloid, lays printing material particles on the flexible colloid, and then prints the workpiece on the printing material particles. The surface material of this method can partially isolate the high-temperature damage of the high-temperature molten printing material to the colloid material, avoiding the need to replace different types of colloid materials as the printing material is replaced; the flexible base plate avoids defects such as cracking caused by stress concentration during printing; when removing the workpiece, it is relatively easy to remove the workpiece by simply shoveling the bottom edge of the workpiece; after the workpiece is removed, the flexible base plate can be repaired and reused.

Brief Description of the Drawings

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Wherein: 1-container; 2-flexible colloid; 3-printing material particles; 4-workpiece. [Specific implementation method]

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0034] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The present invention discloses a large-size, anti-warping, easy-to-remove 3D printing flexible base plate and a manufacturing method thereof; see Figure 1 The base plate of the present invention includes a container 1. The material of the container 1 is a wooden material. The wooden container adopts a wooden board or a bakelite composite board with high flatness and easy processing, such as an Austen board, a woodworking board or an European pine board. The container 1 is designed according to the shape and size of the workpiece 4 to be printed, and is made into a container 1 with a certain shape and volume. The shape of the container 1 can be a cylindrical, rectangular cylindrical or other forms of containers. During the design process of the container 1, in order to save the base plate material to the maximum extent, the cross-section of the container 1 is processed into the same shape as the workpiece to be processed, but the area of ​​its upper surface is larger than the shape of the bottom surface of the workpiece to be processed; the container 1 is filled with a flexible colloid 2, and the flexible colloid 2 is required to be a thermoplastic adhesive or a thermosetting adhesive with a good bonding effect with the wooden board, such as white latex, epoxy-based adhesive and phenolic-based adhesive. In order to ensure the support Effect, different types of fillers can be added to the flexible colloid 2 to adjust the rigidity of the colloid, such as inorganic fillers or elastic particles. During the implementation process, the filler and the flexible colloid 2 are evenly mixed in a certain proportion in advance. There is no fixed type requirement for the filler, but the basic requirement to be met is that it has a good bonding effect with the flexible colloid 2 itself, and after hardening, it is in a whole state with the flexible colloid 2 and cannot be separated from each other; the upper part of the flexible colloid 2 is paved with printing material particles 3 that are the same as the material of the workpiece 4, and the printing material particles 3 are evenly laid on the surface of the entire flexible colloid 2. A part of the printing material particles 3 is located in the flexible colloid 2, and the other part is located outside the flexible colloid 2 to ensure that the printing material particles 3 have sufficient bonding force with the flexible colloid 2, and at the same time, the print head and the flexible colloid 2 can be isolated during printing.

[0036] The method for making and using the large-size anti-warping easy-to-remove polymer three-dimensional printing base plate of the present invention comprises the following steps:

[0037] Step 1, according to the target shape of the workpiece to be processed, the wooden material is processed into a container 1 with a certain shape, the shape of the container 1 is the same as the shape of the target workpiece 4, and its cross-sectional area is larger than the cross-sectional area of ​​the target workpiece 4; the thickness of the container 1 is determined by the thickness of the flexible colloid 2, and the thickness of the flexible colloid 2 is determined by the material properties and size of the target workpiece 4 and the rigidity of the container 1 itself. The thickness design principle of the flexible colloid 2 is that the flexible colloid 2 will not be pulled out of the container 1 during the contraction of the target workpiece 4.

[0038] Step 2, filling the container 1 with a flexible colloid 2 to provide a flexible support for the bottom plate of the workpiece 4; to ensure that the flexible colloid 2 has a good hardening effect, it needs to be added to the wooden container 1 in batches, and the next layer is added after the previous layer of colloid is hardened, until the required thickness of the flexible colloid 2 is reached;

[0039] Step 3, laying printing material particles 3 that are the same as the printing material on the upper part of the flexible colloid 2, the specific process is as follows:

[0040] After the last layer of flexible colloid 2 is added, wait until it hardens to a certain degree (the standard is that the printing material particles 3 are spread on it without obvious sedimentation), lay the printing material particles 3, insert the printing material particles 3 into the uppermost layer of flexible colloid 2, and use a flat tool to flatten the surface.

[0041] After the printed material particles 3 on the surface are solidified with the flexible colloid 2, the printed material particles 3 that are not firmly bonded to the surface are removed with a copper brush, and then cleaned with a vacuum cleaner; the final printed material particles 3 are ensured to be partially inside the colloid and partially exposed outside, and the flexible base plate is completed;

[0042] Step 4, printing the workpiece on the base plate to ensure that the entire base plate has a good bonding effect with the bottom layer of the workpiece 4, and to play a buffering role in the high-temperature damage of the high-temperature molten material to the flexible colloid 2 when printing the first layer;

[0043] Step 5, after printing is completed, the workpiece 4 is scraped off, and the original flexible colloid 2 and printing material particles 3 that have been scraped off are repaired and hardened, so that the flexible base plate can be used multiple times.

[0044] Example

[0045] (1) It is planned to print a part made of ABS material with a bottom size of 400mm*400mm;

[0046] (2) Use Osson board to make a rectangular wooden container with a size of 450 mm*450 mm*5 mm (length, width and height);

[0047] (3) Use an iron brush to roughen the bottom surface of the wooden container;

[0048] (4) Use a vacuum cleaner to clean the wood chips and dust inside the wooden container 1;

[0049] (5) Pour white latex into the wooden container in three times, with the thickness of each pouring being between 1-1.5 mm. After each pouring, let it stand. After the first layer of white latex is solidified, pour the second layer. After the second layer is hardened, pour the third layer. Smooth the surface of the top layer of latex to ensure that the upper surface of the white latex is about 1-1.5 mm away from the upper edge of the wooden container.

[0050] (6) Evenly spread the dried ABS particles (3 mm cylindrical material) on the surface of the flexible colloid 2, with the laying height being about 1-1.5 mm higher than the upper edge of the wooden container;

[0051] (7) Use a flat plate that is larger than the top of the wooden container to press the particles downward so that the surface of the particles is flush with the edge of the top of the wooden container, thereby compacting the flexible colloid 2;

[0052] (8) Place the prepared flexible base plate in a ventilated and dry place to allow it to harden quickly;

[0053] (9) After the white latex hardens, use a vacuum cleaner to remove the unbonded particles on the surface;

[0054] (10) Use a copper brush to brush the surface of the flexible base plate repeatedly for 3-5 times to brush off the particles that are not firmly adhered to the surface and use a vacuum cleaner to suck away the brushed particles, thus completing the production of the flexible base plate.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-size, warping-resistant, and easy-to-remove 3D printing flexible base plate, characterized in that: include: A container (1), wherein a solidified flexible colloid (2) is loaded in the container (1), printing material particles (3) are laid on the surface of the solidified flexible colloid (2), a portion of the printing material particles (3) are in the flexible colloid (2), and the printing material particles (3) and the workpiece (4) are made of the same material; The lower surface of the workpiece (4) is covered by the upper surface of the solidified flexible colloid (2); The flexible colloid (2) is filled with a filler.

2. A large-size, anti-warping, easy-to-remove 3D printing flexible base plate according to claim 1, characterized in that: The container (1) is made of wood.

3. The large-size, anti-warping, easy-to-remove 3D printing flexible base plate according to claim 2, characterized in that: The wood material is OSB board, wood board or OSB board.

4. The large-size, anti-warping, easy-to-remove 3D printing flexible base plate according to claim 1, characterized in that: The flexible colloid (2) is white latex, epoxy-based adhesive or phenolic-based adhesive.

5. The large-size, anti-warping, easy-to-remove 3D printing flexible base plate according to claim 4, characterized in that: The filler is an inorganic filler or elastic particles.

6. A method for using a large-size, warping-resistant, and easy-to-remove 3D printing flexible base plate, characterized in that: The following steps are involved: Step 1, making a container (1); Step 2, filling the container (1) with the flexible colloid (2), and solidifying the flexible colloid (2); Step 3, laying printing material particles (3) on the flexible colloid (2); Step 4, printing a target workpiece (4) on the printing material particles (3); Step 5, separating the workpiece (4) and the flexible colloid (2), completing the entire printing process.

7. The method for using a large-size anti-warping and easy-to-remove 3D printing flexible base plate according to claim 6, characterized in that: In step 2, the flexible colloid (2) is added to the container (1) in batches, and before each addition, the next layer of flexible colloid (2) is added after the previous layer of flexible colloid (2) is solidified.

8. The method for using a large-size anti-warping and easy-to-remove 3D printing flexible base plate according to claim 7, characterized in that: In step 3, the printing material particles (3) are laid before the last layer of the flexible colloid (2) is completely solidified, and the printing material particles (3) are partially in the flexible colloid (2).

9. The method for using a large-size, anti-warping, and easy-to-remove 3D printing flexible base plate according to claim 1, characterized in that: It is characterized in that In step 5, after the workpiece (4) and the flexible colloid (2) are separated, the flexible colloid (2) and the printing material particles (3) are re-laid on the surface of the flexible colloid (2) from which the workpiece (4) has been removed.

Images