Scraper for printing powder spreading and printing equipment

Abstract

The utility model relates to the technical field of printing equipment, in particular to a scraper for printing powder spreading and printing equipment, the scraper for printing powder spreading comprises a fixing piece, the fixing piece extends along a first direction, and a convex part extending along the first direction is fixedly arranged at the lower end of the fixing piece; the scraper piece extends in the first direction, the scraper piece and the fixing piece are formed in an injection mode, the scraper piece is located at the lower end of the fixing piece, and the scraper piece wraps the protruding part. The powder spreading device guarantees powder spreading precision, is convenient to manufacture, and can reduce cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing equipment technical field especially, relates to a kind of scraper and printing equipment for printing powder laying. BACKGROUND

[0002] Scraper is important component in SLM class metal 3D printer, main purpose is to evenly lay powder on forming plane, the flatness of powder laying directly influences the quality and precision of product printing. Therefore, when printing high-precision metal product using 3D printer, scraper with good powder laying flatness needs to be used. In addition, in the process of metal 3D printing, product surface may warp and deform, higher than powder laying plane, scraper will collide with product and produce abrasion in powder laying process, so scraper needs to be frequently replaced as consumable in product mass production process.

[0003] There are two kinds of existing scrapers, one is clamped type, held by metal structure clamp rubber strip part, when using, metal clamp is used to hold rubber strip first, then metal clamp is installed on powder laying swing arm. The other is integrated type, rubber vulcanization connection or cementation is on metal strip, metal strip shape is long strip, and rubber strip contact surface is plane, when using, scraper metal part is directly installed on powder laying swing arm. Among them, the rubber strip part of clamped type scraper needs to be clamped by metal clamp, if the gap between metal clamp and rubber strip is too large, the fixing effect of clamp on rubber is weak, and the rubber strip will shake in powder laying process. On the contrary, if metal clamp and rubber strip are interference fit, rubber strip will be extruded and deformed in clamping process, it is difficult to guarantee the flatness of rubber powder laying plane, and it is easy to cause poor powder laying flatness. Integrated rubber scraper is manufactured by molding rubber strip on metal strip or cementing rubber strip on metal strip. In the use process, metal strip can be directly installed on powder laying swing arm, compared with clamped type, it has higher precision and is more convenient to install. But the metal strip and rubber strip of this kind of scraper are permanently connected, it is difficult to remove rubber strip completely. Therefore, metal strip part is not easy to reuse, and the cost is higher.

[0004] Therefore, a scraper and printing equipment for printing powder laying are needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of scraper and printing equipment for printing powder laying, guaranteeing powder laying precision, facilitating manufacturing, and reducing cost.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Scraper for printing powder laying, comprising:

[0008] A fixing member extending along a first direction, a lower end of the fixing member being provided with a protruding portion extending along the first direction;

[0009] A scraper member extending along the first direction, the scraper member being injection molded with the fixing member, the scraper member being located at the lower end of the fixing member and covering the protruding portion.

[0010] In some embodiments, a groove extending along the first direction is formed at the lower end of the fixing member, and part of the structure of the scraper member is located in the groove.

[0011] In some embodiments, a positioning groove is formed at a side of the protruding portion along the first direction, and the positioning groove is in communication with the groove.

[0012] In some embodiments, the positioning groove is inclined downward along the side of the protruding portion towards the other side of the protruding portion.

[0013] In some embodiments, the positioning groove is formed at both sides of the protruding portion.

[0014] In some embodiments, the length of the protruding portion is less than the length of the fixing member, and the protruding portion is located between the two end faces of the fixing member.

[0015] In some embodiments, at least one partition groove is formed on the protruding portion along the first direction.

[0016] In some embodiments, the groove comprises a straight groove portion and an arc-shaped groove portion in communication with each other, and the arc-shaped groove portion is farther away from the lower end of the fixing member than the straight groove portion.

[0017] In some embodiments, the corresponding width of the arc-shaped groove portion is greater than the width of the straight groove portion.

[0018] A printing device comprising a powder spreading arm and a printing powder scraper as described above, the printing powder scraper being arranged on the powder spreading arm.

[0019] The printing device has the following beneficial effects:

[0020] The utility model provides a kind of scraper for printing powder laying, the lower end of fixed part is fixedly provided with protruding portion along the first direction extension.The scraper part is injection molded with the fixed part, and the scraper part covers the protruding portion.By the cooperation of scraper part and protruding portion, the scraper part is stably connected with the fixed part, and by using injection molding, the powder laying plane of scraper part can be ensured to have high flatness.Due to the fact that no adhesion occurs between the scraper part and the fixed part, the scraper part can be removed from the fixed part by simple shearing after use and wear, and the fixed part can be injection molded with the scraper part again, so that the repeated use of the fixed part can greatly reduce the manufacturing cost of the scraper for printing powder laying.

[0021] The utility model provides a kind of printing equipment, including powder laying swing arm and the scraper for printing powder laying as described above, guarantee powder laying precision, it is convenient for manufacturing, and can reduce cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and these drawings for those skilled in the art without creative labor.

[0023] Fig. 1 It is the front view of the scraper for printing powder laying of the utility model;

[0024] Fig. 2 It is the schematic view of scraper part in the scraper for printing powder laying of the utility model;

[0025] Fig. 3 It is the side view of fixed part in the scraper for printing powder laying of the utility model.

[0026] In the drawings:

[0027] 1, fixed part;11, protruding portion;111, positioning groove;12, recess;121, arc-shaped groove portion;122, straight groove portion;13, connecting hole;2, scraper part. DETAILED DESCRIPTION

[0028] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described drawings.

[0029] In this application, the terms "comprise", "contain", "include", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0030] In this application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. For example, direct connection refers to the connection of two parts or components without the need for an intermediate part, while indirect connection refers to the connection of two parts or components with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0031] In this application, those skilled in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0032] In this application, the terms "up", "down", "left", "right", "front", "back", and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the application. In addition, it should be understood in the context that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under", or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "up", "down", "left", "right", "front", "back", and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the lower side, the lower left side, the lower right side, the lower front side, and the lower back side, etc.

[0033] In the process of manufacturing the printing scraper for 3D printing, in order to ensure the powder laying precision, facilitate the manufacturing, and reduce the cost, such as Figs. 1-3 As shown in the drawings, the utility model provides a printing scraper for printing powder. The printing scraper for printing powder comprises a fixing part 1 and a scraper part 2.

[0034] The fixed part 1 extends along a first direction, a groove 12 extending along the first direction is arranged at the lower end of the fixed part 1, and a protruding part 11 extending along the first direction is arranged at the lower end of the fixed part 1. The scraper part 2 extends along the first direction, the scraper part 2 is injection molded with the fixed part 1, the scraper part 2 is located at the lower end of the fixed part 1, the scraper part 2 covers the protruding part 11, and part of the structure of the scraper part 2 is located in the groove 12.

[0035] The scraper part 2 is stably connected with the fixed part 1 through cooperation of the scraper part 2 with the protruding part 11 and the groove 12, and the scraper part 2 has high planeness of the powder laying plane through injection molding and the mold. Since the protruding part 11 is located inside the scraper part 2, the scraper part 2 is provided with internal rigid support, so that the scraper part 2 can better maintain the shape and has higher rigidity. Since the scraper part 2 and the fixed part 1 are not bonded, the scraper part 2 can be removed from the fixed part 1 through simple shearing after being worn, the fixed part 1 can be injection molded with the scraper part 2 again, and repeated use of the fixed part 1 can greatly reduce the manufacturing cost of the scraper for printing powder laying.

[0036] In some embodiments, the fixed part 1 is made of steel, aluminum alloy or other metal, which can ensure sufficient rigidity and will not be bent during use. The scraper part 2 is made of rubber, which can effectively spread the metal powder. In other embodiments, the scraper can also be made of silica gel or plastic, which is not limited here.

[0037] In some embodiments, a positioning groove 111 is arranged at the side of the protruding part 11 along the first direction, and the positioning groove 111 is communicated with the groove 12. By arranging the positioning groove 111, part of the structure of the scraper part 2 is filled into the positioning groove 111 when the fixed part 1 and the scraper part 2 are injection molded, so as to further improve the connection strength of the scraper part 2 and the fixed part 1, and prevent the scraper part 2 from shaking relative to the fixed part 1 during work.

[0038] In some embodiments, the positioning groove 111 is arranged downwardly along the side of the protruding part 11 towards the other side of the protruding part 11. By the above arrangement, the positioning groove 111 is locked with the scraper part 2, so as to further improve the connection strength of the scraper part 2 and the fixed part 1.

[0039] In some embodiments, the two sides of the protruding part 11 are both provided with the positioning groove 111. By arranging two positioning grooves 111, part of the structure of the two sides of the scraper part 2 is matched with the positioning grooves 111 after the scraper part 2 and the fixed part 1 are injection molded, so as to stably connect the scraper part 2 and the fixed part 1.

[0040] In some embodiments, the length of the protrusion 11 is less than the length of the fixing member 1, and the protrusion 11 is located between the two end faces of the fixing member 1. Through the above arrangement, after the scraper member 2 is wrapped on the protrusion 11, the two ends of the protrusion 11 are also located in the scraper member 2, so that the scraper member 2 is limited by the protrusion 11 in the first direction, preventing the scraper member 2 from moving in the first direction; and shortening the length of the protrusion 11 can save materials.

[0041] In some embodiments, at least one partition groove is arranged on the protrusion 11 in the first direction. After the scraper member 2 and the fixing member 1 are injection molded, part of the scraper member 2 is located in the partition groove. Through the arrangement of the partition groove, the limiting effect of the protrusion 11 on the scraper member 2 can be further improved, preventing the scraper member 2 from moving in the first direction. Moreover, the length of the protrusion 11 can be further shortened, which can save materials. The number and length of the partition groove can be designed according to actual needs, which is not limited here.

[0042] In some embodiments, the fixing member 1 and the protrusion 11 are an integrated structure. By designing the fixing member 1 and the protrusion 11 as an integrated structure, manufacturing is facilitated, and the connection strength of the protrusion 11 and the fixing member 1 can be ensured. In other embodiments, the protrusion 11 and the fixing member 1 can also be connected by screws, which is not limited here.

[0043] In some embodiments, the fixing member 1 is provided with a connecting hole 13 for connecting with the powder laying swing arm of the 3D printing equipment. Specifically, a plurality of connecting holes 13 are arranged on the fixing member 1 and spaced apart in the first direction. By arranging the connecting hole 13, subsequent installation and disassembly on the powder laying swing arm are facilitated.

[0044] In some embodiments, the groove 12 includes a straight groove portion 122 and an arc-shaped groove portion 121 that are in communication with each other, and the arc-shaped groove portion 121 is farther away from the lower end of the fixing member 1 than the straight groove portion 122. Through the above arrangement, after the scraper member 2 and the fixing member 1 are injection molded, the scraper member 2 is filled in the straight groove portion 122 and the arc-shaped groove portion 121. By cooperating the scraper member 2 with the groove 12, the scraper member 2 and the fixing member 1 can be locked, thereby ensuring the connection strength of the scraper member 2 and the fixing member 1.

[0045] In some embodiments, the corresponding width of the arc-shaped groove portion 121 is greater than the width of the straight groove portion 122. Through the above arrangement, part of the structure of the scraper member 2 is located in the arc-shaped groove portion 121 and the straight groove portion 122, and the arc-shaped groove portion 121 can play a limiting role, preventing the scraper member 2 from separating from the fixing member 1.

[0046] The present embodiment also provides a printing device, which comprises a powder laying swing arm and a printing powder scraper as described above, and the printing powder scraper is arranged on the powder laying swing arm, which can ensure the powder laying precision, facilitate manufacturing, and reduce costs.

[0047] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A doctor blade for powder spreading in printing, characterized in that The application relates to a fixing piece (1) extending along a first direction, a lower end of the fixing piece (1) being fixedly provided with a protruding part (11) extending along the first direction; a scraper piece (2) extending along the first direction, the scraper piece (2) being injection molded with the fixing piece (1), the scraper piece (2) being located at the lower end of the fixing piece (1) and covering the protruding part (11). A groove (12) extending along the first direction is arranged at the lower end of the fixing piece (1), and part of the structure of the scraper piece (2) is located in the groove (12). A positioning groove (111) is arranged at the side of the protruding part (11) along the first direction, and the positioning groove (111) is communicated with the groove (12).

2. The doctor blade for print powder spreading according to claim 1, characterized by, The positioning groove (111) is arranged downwardly along the side of the protruding part (11) and towards the other side of the protruding part (11).

3. The doctor blade for print powder spreading according to claim 2, characterized by, The two sides of the protruding part (11) are both provided with the positioning groove (111).

4. The doctor blade for print powder spreading according to claim 3, characterized by, The length of the protruding part (11) is smaller than the length of the fixing piece (1), and the protruding part (11) is located between the two end faces of the fixing piece (1).

5. The doctor blade for print powder spreading according to claim 3, characterized by, At least one partition groove is arranged on the protruding part (11) along the first direction.

6. The doctor blade for print powder spreading according to claim 1, wherein The groove (12) comprises a straight groove part (122) and an arc-shaped groove part (121) which are communicated with each other, and the arc-shaped groove part (121) is farther away from the lower end of the fixing piece (1) than the straight groove part (122).

7. The doctor blade for print powder spreading according to claim 1, wherein The corresponding width of the arc-shaped groove part (121) is greater than the width of the straight groove part (122).

8. The doctor blade for print powder spreading according to claim 2, characterized by, The application further relates to a powder spreading arm and a printing powder scraper as claimed in any one of claims 1-9, wherein the printing powder scraper is arranged on the powder spreading arm.

9. The doctor blade for powder printing according to claim 8, wherein ​ 10. A printing apparatus characterized by comprising: ​

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