Forming cylinder sealing structure and additive manufacturing equipment comprising forming cylinder sealing structure

Abstract

The utility model provides a forming cylinder sealing structure and additive manufacturing equipment comprising the forming cylinder sealing structure, and belongs to the technical field of additive manufacturing equipment.The forming cylinder sealing structure is arranged above a guide mechanism, and a chain plate is completely attached to the sealing face of a steel belt; below the guide mechanism, the steel belt is wound on the guide mechanism and is connected with the bottom of the forming cylinder, and the chain plate extends to the bottom of the forming cylinder along the lower part of the guide mechanism and is connected with the bottom of the forming cylinder. The chain plate is used as a supporting structure, so that the manufacturing cost of equipment can be reduced; and meanwhile, in the vertical movement process of the cantilever, the chain plate is completely attached to the sealing face of the steel belt above the guide mechanism, relative movement cannot be generated between the chain plate and the steel belt, the steel belt can be stably supported, the situation that powder materials are leaked after the steel belt is extruded by the powder materials in the forming cylinder to deform is avoided, and the sealing performance of the steel belt is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to additive manufacturing equipment technical field relates to the sealing technology of additive manufacturing forming cylinder, concretely is forming cylinder sealing structure and contains additive manufacturing equipment of the forming cylinder sealing structure. BACKGROUND

[0002] Additive manufacturing is a kind of technology that gradually adds materials to manufacture entity parts, and compared with traditional material removal-cutting processing technology, additive manufacturing is a "bottom-up" manufacturing method. It can quickly and precisely manufacture parts of any complex shape on a device, thereby realizing part "free manufacturing", solving the forming of many complex structure parts and greatly reducing processing procedures and shortening processing cycle.

[0003] In the prior art, in order to increase the stroke of the additive manufacturing equipment and reduce the overall height of the equipment, a cantilever type additive manufacturing equipment that moves up and down is derived. In order to facilitate the cantilever to drive the forming platform to move up and down, a longitudinal opening is needed on one side wall of the forming cylinder. In order to ensure the sealing environment in the forming chamber, a steel belt is generally used to seal the corresponding longitudinal opening part of the forming chamber. Referring to the patent document with the application number CN201720856105.6, a steel belt sealing device of a forming cylinder is disclosed, which distributes several magnets on the inner wall of the forming cylinder in contact with the longitudinal opening. The magnets and the steel belt are sealed by the attractive force between them. However, in actual use, the steel belt itself is not sufficient to withstand the pressure of the powder material in the forming cylinder and will deform, thereby risking leakage of the powder material. UTILITY MODEL CONTENTS

[0004] In view of the technical problems described in the above background technology, the steel belt itself is not sufficient to withstand the pressure of the powder material in the forming cylinder and will deform, resulting in a risk of leakage of the powder material. To solve this technical problem, the utility model provides a forming cylinder sealing structure and an additive manufacturing equipment containing the same.

[0005] The utility model sets a chain plate on the sealing surface of the steel belt, which can reduce the manufacturing cost of the equipment by using the chain plate as a support structure. During the up-and-down movement of the cantilever, the chain plate and the sealing surface of the steel belt are completely attached above the guide mechanism, and there is no mutual friction between the chain plate and the steel belt, which will not cause wear to the steel belt. There is no relative movement between the chain plate and the steel belt, which can stably support the steel belt and prevent the steel belt from deforming due to the extrusion of the powder material in the forming cylinder, thereby preventing leakage of the powder material and improving the sealing performance of the steel belt.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model provides a forming cylinder sealing structure, comprising a forming cylinder, a forming cylinder opening being provided along the longitudinal direction of the forming cylinder, a cantilever being clamped in the forming cylinder opening, one end of the cantilever extending out of the forming cylinder, the other end of the cantilever extending into the forming cylinder and having a guide mechanism and a forming platform sequentially provided thereon, a sealing unit for sealing the forming cylinder opening being connected to the guide mechanism, one end of the sealing unit being fixed to the top end of the forming cylinder opening, and the other end being connected to the bottom of the forming cylinder;

[0008] The sealing unit includes a steel belt and a chain plate. Above the guide mechanism, the chain plate is completely in contact with the sealing surface of the steel belt; below the guide mechanism, the steel belt is wrapped around the guide mechanism and connected to the bottom of the forming cylinder, and the chain plate extends along the bottom of the guide mechanism to the bottom of the forming cylinder and is connected to the bottom of the forming cylinder; the sealing surface of the steel belt refers to the contact surface between the steel belt and the cylinder wall of the forming cylinder.

[0009] It is further defined that the width of the steel strip is greater than the width of the opening of the forming cylinder.

[0010] It is further defined that an upper clamping piece is provided at the top of the forming cylinder opening, and the sealing unit is fixedly connected to the top of the forming cylinder opening through the upper clamping piece; a lower clamping piece is provided at the bottom of the forming cylinder, and the sealing unit is fixedly connected to the bottom of the forming cylinder through the lower clamping piece.

[0011] It is further defined that the guide mechanism includes a first guide wheel and a second guide wheel, the first guide wheel and the second guide wheel are both connected to the cantilever through a roller mounting seat, and the steel belt is wound around the first guide wheel and the second guide wheel.

[0012] It is further defined that the path of the steel strip in the forming cylinder is: extending from the top of the forming cylinder opening downward along the forming cylinder opening and successively passing the first guide wheel and the second guide wheel and then being fixed at the bottom of the forming cylinder, forming an "S" shape distribution.

[0013] It is further defined that the guide mechanism further includes a guide block, the guide block is arranged below the first guide wheel, the chain plate is wrapped around the guide block and extends along the bottom of the first guide wheel and the bottom of the second guide wheel to the bottom of the forming cylinder;

[0014] The path of the chain plate in the forming cylinder is: extending downward from the top of the forming cylinder opening along the sealing surface of the steel belt and bypassing the guide block, and then extending along the bottom of the first guide wheel and the bottom of the second guide wheel to the bottom of the forming cylinder, forming an "S" shape distribution.

[0015] It is further defined that the steel belt is located above the forming platform and is tightly fitted to the inner wall of the forming cylinder, so as to seal the opening of the forming cylinder; the opening of the forming cylinder is provided with a slot, which is opened on the side wall of the forming cylinder, and the chain plate is placed in the slot of the opening of the forming cylinder and is tightly fitted to the steel belt.

[0016] Further limited, the guide block is located above the cantilever, and is fixedly connected with the cantilever.

[0017] Further limited, the chain plate is a metal chain plate.

[0018] Further limited, the cantilever is connected with a cantilever driving member, and the cantilever driving member drives the forming platform to move along the forming cylinder opening through the cantilever.

[0019] The utility model provides a kind of additive manufacturing equipment containing forming cylinder sealing structure, containing above-mentioned forming cylinder sealing structure, the cantilever is connected with cantilever driving member, and the cantilever driving member drives the forming platform to move along the forming cylinder opening through the cantilever;The cantilever is single-side drive type structure or double-side drive type structure, when the cantilever is double-side drive type structure, it contains two symmetrically arranged forming cylinder sealing structures.

[0020] Compared with prior art, the utility model has the beneficial effects that:

[0021] 1, the utility model discloses forming cylinder sealing structure, it is set up chain plate in the sealing surface of steel band, and chain plate is used as support structure to reduce the manufacturing cost of equipment. While moving up and down in cantilever, in the upper portion of guide mechanism, the sealing surface of chain plate and steel band is completely adhered, and mutual friction between chain plate and steel band cannot be generated, and steel band cannot be abraded. Chain plate and steel band cannot generate relative motion, can stably support steel band, avoid that steel band is extruded after deformation by powder material in forming cylinder, causes powder material leakage, improves the sealing performance of steel band.

[0022] 2, the utility model discloses forming cylinder sealing structure, it further includes upper clamping piece and lower clamping piece, and the top end of forming cylinder opening is fixedly connected with sealing unit by upper clamping piece, and the bottom of forming cylinder is fixedly connected with sealing unit by lower clamping piece, realizes the tension of chain plate and steel band, guarantees the stability of steel band in the process of moving up and down in cantilever.

[0023] 3, in the utility model, steel band and chain plate form S-shaped structure in forming cylinder, and steel band and chain plate are tightened by S-shaped structure, so that cantilever moves up and down naturally, further improve the sealing performance of steel band and the support performance of chain plate.

[0024] 4, in the utility model, its guide mechanism further includes guide block, and guide block plays the guiding effect to chain plate. ACCURACY OF DRAWINGS

[0025] Figure 1 It is the front view of the utility model discloses forming cylinder sealing structure section view;

[0026] Figure 2This is a top sectional view of the sealing structure of the forming cylinder of the utility model;

[0027] Figure 3 This is an axonometric diagram of the sealing structure of the forming cylinder of the utility model;

[0028] Figure 4 Schematic diagram of the structure of the metal chain plate;

[0029] Among them, 1-upper clamping piece, 2-steel belt, 3-metal chain plate, 4-guide block, 5-guide mechanism, 51-first guide wheel, 52-second guide wheel, 6-forming platform, 7-cantilever, 8-lower clamping piece, 9-forming cylinder, 10-powder material, 11-forming cylinder opening. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be further explained below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the embodiments described below.

[0031] See also Figure 1 and Figure 3 The forming cylinder sealing structure of the present invention includes a forming cylinder 9, a forming cylinder opening 11 is provided along the longitudinal direction of the forming cylinder 9, a cantilever 7 is clamped in the forming cylinder opening 11, one end of the cantilever 7 extends out of the forming cylinder 9, and the other end of the cantilever 7 extends into the forming cylinder 9 and is sequentially provided with a guide mechanism 5 and a forming platform 6, a sealing unit for sealing the forming cylinder opening 11 is connected to the guide mechanism 5, one end of the sealing unit is fixed to the top of the forming cylinder opening 11, and the other end is connected to the bottom of the forming cylinder 9; the sealing unit includes a steel belt 2 and a chain plate, above the guide mechanism 5, the chain plate is completely in contact with the sealing surface of the steel belt 2; below the guide mechanism 5, the steel belt 2 is wrapped around the guide mechanism 5 and connected to the bottom of the forming cylinder 9, the chain plate extends along the bottom of the guide mechanism 5 to the bottom of the forming cylinder 9 and is connected to the bottom of the forming cylinder 9; the sealing surface of the steel belt 2 refers to the side where the steel belt 2 is in contact with the cylinder wall of the forming cylinder 9.

[0032] See also Figure 2 The width of the steel belt 2 is greater than the width of the forming cylinder opening 11. Specifically, the section of the steel belt 2 located above the forming platform is tightly attached to the inner wall of the forming cylinder, used to seal the forming cylinder opening 10. Slots are provided on both sides of the forming cylinder opening 11. The slots are opened on the side walls of the forming cylinder 9. After the chain plate and the steel belt 2 are tightly attached, their two side edges extend into the slots on both sides of the forming cylinder opening 11. The slots limit the chain plate, and the chain plate supports the steel belt 2.

[0033] The chain plate is used as the supporting structure to reduce the manufacturing cost of the equipment; meanwhile, in the process of the upward and downward movement of the cantilever 7, the sealing surface of the chain plate and the steel belt 2 is completely attached above the guide mechanism 5, the chain plate and the steel belt 2 will not be rubbed with each other, and the steel belt 2 will not be abraded, and the technical problem that the steel belt 2 is frequently damaged due to the indentation is solved. The chain plate and the steel belt 2 will not be moved relatively, the steel belt 2 can be stably supported, the leakage of the powder material 10 caused by the extrusion deformation of the steel belt 2 is avoided, and the sealing performance of the steel belt 2 is improved.

[0034] Referring to Figure 1 The utility model discloses a top clamping piece 1 is provided at the top of forming cylinder opening 11, and the sealing unit is fixedly connected at the top of forming cylinder opening 11 through the top clamping piece 1. The bottom of forming cylinder 9 is provided with a lower clamping piece 8, and the sealing unit is fixedly connected at the bottom of forming cylinder 9 through the lower clamping piece 8. The chain plate and the steel belt 2 are taut through the top clamping piece 1 and the lower clamping piece 8, and the stability of the steel belt 2 in the upward and downward movement of the cantilever 7 is guaranteed. The fixed connection mode can be any one of clamping, cementing, tensioning and the like known to those skilled in the art.

[0035] The utility model discloses a top clamping piece 7 is fixedly connected with the top of forming cylinder opening 11, and the sealing unit is fixedly connected with the bottom of forming cylinder 9 through the lower clamping piece 8, realizes the chain plate and the steel belt 2's taut, guarantees the stability of the steel belt 2 in the upward and downward movement of the cantilever 7.

[0036] The utility model discloses a guide mechanism 5 includes mutually parallel first guide wheel 51 and second guide wheel 52, and first guide wheel 51 and second guide wheel 52 are all placed in the top of cantilever 7, and the steel belt 2 is wound on first guide wheel 51 and second guide wheel 52. The forming platform 6 is located in the top of first guide wheel 51 and second guide wheel 52. The path of the steel belt 2 in the forming cylinder 9 is: from the top of forming cylinder opening 11 along forming cylinder opening 11 downwardly extending and in turn winding past first guide wheel 51 and second guide wheel 52 and then being fixed at the bottom of forming cylinder 8, forming " S " shape distribution. Among them, the steel belt 2 winds past the bottom of first guide wheel 51 first, then winds past the top of second guide wheel 52, and a gap is arranged between second guide wheel 52 and the forming platform 6 for the steel belt 2 to wind past.

[0037] Specifically, a roller mounting seat is arranged on the cantilever 7, and the first guide wheel 51 and the second guide wheel 52 are connected with the cantilever 7 through the roller mounting seat.

[0038] The guiding mechanism 5 further comprises a guiding block 4, which is arranged below the first guiding wheel 51 and above the cantilever 7; the chain plate is wound on the guiding block 4 and extends to the bottom of the forming cylinder 9 below the first guiding wheel 51 and the second guiding wheel 52. The path of the chain plate in the forming cylinder 9 is: extending downwards along the sealing surface of the steel belt 2 from the top of the forming cylinder opening 11 and bypassing the guiding block 4, and then extending to the bottom of the forming cylinder 9 below the first guiding wheel 51 and the second guiding wheel 52, forming an "S" shape distribution. The guiding block 4 is above the cantilever 7 and is fixedly connected with the cantilever 7, and preferably, the part of the guiding block 4 in contact with the chain plate is an arc surface, which can reduce the friction between the guiding block 4 and the chain plate.

[0039] In the utility model, the steel belt 2 and the chain plate form S-shaped structures in the forming cylinder 9, the steel belt 2 and the chain plate are taut through the S-shaped structures, so that the cantilever 7 can naturally move up and down, and the sealing performance of the steel belt 2 and the supporting performance of the chain plate are further improved.

[0040] In the utility model, the cantilever 7 is connected with a cantilever driving member, the cantilever driving member drives the forming platform 6 to move along the forming cylinder opening 11 through the cantilever 7, the powder material 10 is laid on the forming platform 6 layer by layer, and the laser melts layer by layer according to a specific path to print the part. Specifically, the cantilever driving member can be a servo motor or other equipment known to those skilled in the art which can drive linearly.

[0041] Referring to Figure 4 In the utility model, the chain plate is a metal chain plate 3.

[0042] The utility model further provides an additive manufacturing equipment comprising the forming cylinder sealing structure, the cantilever 7 is connected with a cantilever driving member, the cantilever driving member drives the forming platform 6 to move along the forming cylinder opening 11 through the cantilever 7; wherein the cantilever 7 is a single-side driving structure or a double-side driving structure, when the cantilever 7 is the single-side driving structure, comprising a symmetrically arranged forming cylinder sealing structure; when the cantilever 7 is the double-side driving structure, comprising two symmetrically arranged forming cylinder sealing structures.

[0043] The preferred embodiments of the utility model are described above only and are not used to limit the utility model, for those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. The sealing structure of the forming cylinder is characterized by: The invention comprises a forming cylinder (9), a forming cylinder opening (11) is provided along the longitudinal direction of the forming cylinder (9), a cantilever (7) is clamped in the forming cylinder opening (11), one end of the cantilever (7) extends out of the forming cylinder (9), the other end of the cantilever (7) extends into the forming cylinder (9) and a guide mechanism (5) and a forming platform (6) are sequentially provided thereon, a sealing unit for sealing the forming cylinder opening (11) is connected to the guide mechanism (5), one end of the sealing unit is fixed to the top of the forming cylinder opening (11), and the other end is connected to the bottom of the forming cylinder (9); The sealing unit comprises a steel belt (2) and a chain plate. Above the guide mechanism (5), the chain plate is in complete contact with the sealing surface of the steel belt (2); below the guide mechanism (5), the steel belt (2) is wound around the guide mechanism (5) and connected to the bottom of the forming cylinder (9); the chain plate extends along the bottom of the guide mechanism (5) to the bottom of the forming cylinder (9) and is connected to the bottom of the forming cylinder (9); the sealing surface of the steel belt (2) refers to the contact surface between the steel belt (2) and the cylinder wall of the forming cylinder (9).

2. The forming cylinder sealing structure according to claim 1, characterized in that: The width of the steel strip (2) is greater than the width of the forming cylinder opening (11).

3. The forming cylinder sealing structure according to claim 2, characterized in that: An upper clamping member (1) is provided at the top of the forming cylinder opening (11), and the sealing unit is fixedly connected to the top of the forming cylinder opening (11) through the upper clamping member (1); a lower clamping member (8) is provided at the bottom of the forming cylinder (9), and the sealing unit is fixedly connected to the bottom of the forming cylinder (9) through the lower clamping member (8).

4. The forming cylinder sealing structure according to claim 3, characterized in that: The guide mechanism (5) comprises a first guide wheel (51) and a second guide wheel (52), wherein the first guide wheel (51) and the second guide wheel (52) are both connected to the cantilever (7) via a roller mounting seat, and the steel belt (2) is wound around the first guide wheel (51) and the second guide wheel (52).

5. The forming cylinder sealing structure according to claim 4, characterized in that: The path of the steel strip (2) in the forming cylinder (9) is as follows: extending downward from the top of the forming cylinder opening (11) along the forming cylinder opening (11) and passing through the first guide wheel (51) and the second guide wheel (52) in sequence before being fixed at the bottom of the forming cylinder (9), forming an "S"-shaped distribution.

6. The forming cylinder sealing structure according to claim 4, characterized in that: The guide mechanism (5) further comprises a guide block (4), the guide block (4) being arranged below the first guide wheel (51), the chain plate being wound around the guide block (4) and extending along below the first guide wheel (51) and below the second guide wheel (52) to the bottom of the forming cylinder (9); The path of the chain plate in the forming cylinder (9) is as follows: extending downward from the top of the forming cylinder opening (11) along the sealing surface of the steel belt (2) and bypassing the guide block (4), and then extending along the bottom of the first guide wheel (51) and the bottom of the second guide wheel (52) to the bottom of the forming cylinder (9), forming an "S" shape distribution.

7. The forming cylinder sealing structure according to claim 1, characterized in that: The steel belt (2) is located above the forming platform (6) and is tightly fitted to the inner wall of the forming cylinder, and is used to seal the forming cylinder opening (11); the forming cylinder opening (11) is provided with a slot, and the slot is opened on the side wall of the forming cylinder (9); the chain plate is placed in the slot of the forming cylinder opening (11) and is tightly fitted to the steel belt (2).

8. The forming cylinder sealing structure according to claim 6, characterized in that: The guide block (4) is located above the cantilever (7) and is fixedly connected to the cantilever (7).

9. The forming cylinder sealing structure according to any one of claims 1 to 8, characterized in that: The chain plates are metal chain plates (3).

10. An additive manufacturing device comprising a forming cylinder sealing structure, comprising the forming cylinder sealing structure according to any one of claims 1 to 8, wherein the cantilever (7) is connected to a cantilever driving member, and the cantilever driving member drives the forming platform (6) to move along the forming cylinder opening (11) through the cantilever (7); characterized in that The cantilever (7) is a single-side driven structure or a double-side driven structure. When the cantilever (7) is a double-side driven structure, it comprises two symmetrically arranged forming cylinder sealing structures.

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