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 comprises a forming cylinder, a forming cylinder opening is formed in the longitudinal direction of the forming cylinder, a cantilever is clamped in the forming cylinder opening, one end of the cantilever extends out of the forming cylinder, and the other end of the cantilever extends out of the forming cylinder. The other end of the cantilever extends into the forming cylinder and is sequentially provided with a guide mechanism and a forming platform, the guide mechanism is connected with a sealing unit used for sealing an opening of the forming cylinder, one end of the sealing unit is fixed to the top end of the opening of the forming cylinder, and the other end of the sealing unit is wound on the guide mechanism and connected with the bottom of the forming cylinder. The sealing unit comprises a steel belt and a transmission belt, and the transmission belt is completely attached to the sealing face of the steel belt. An existing complex sealing structure is removed, the transmission belt serves as a supporting structure of the steel belt, the manufacturing cost of equipment can be reduced, meanwhile, the transmission belt and the steel belt are completely attached, mutual friction cannot be generated, and abrasion to the steel belt cannot be generated.

Description

TECHNICAL FIELD

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

[0002] In order to increase the motion stroke, reduce the overall height of the equipment, the additive manufacturing equipment derives the equipment of cantilever type Z axis movement mechanism, and in order to prevent the leakage of powder material in the forming cylinder, the cantilever movement section of the equipment is often sealed by steel belt, but the thickness of the steel belt is relatively thin, and it is not enough to withstand the pressure of the powder material.

[0003] Referring to the patent literature with the application number CN201720856634.6, a kind of additive manufacturing equipment forming cylinder sealing device is disclosed, including forming cylinder, longitudinally arranged with longitudinal opening along forming cylinder, longitudinal opening is connected with cantilever, cantilever one end enters into forming cylinder and its upper fixed with forming platform, cantilever the other end extends longitudinal opening and its upper connection has chain, forming cylinder and longitudinal opening contact place inner wall still be provided with steel belt, steel belt and chain between being provided with support block.The technology recorded in the patent literature is to set support block between steel belt and chain to support steel belt, on the one hand, the driving mechanism of chain needs to be provided during the up-down movement of forming platform, the support structure is complex, resulting in the technical problem of high equipment cost, on the other hand, during the up-down movement of cantilever, support block is difficult to support steel belt without gap, resulting in the technical problem that steel belt is often damaged with indentation. UTILITY MODEL CONTENTS

[0004] In view of the above background art, the prior art sets a support block between the steel belt and the chain to support the steel belt. However, due to the complex support structure and the difficulty of the support block to support the steel belt without gap, the technical problems of high equipment cost and frequent damage of the steel belt with indentation exist. 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 transmission belt on one side close to the sealing surface of the steel belt, removes the existing complex sealing structure, and uses the transmission belt as the support structure of the steel belt to reduce the manufacturing cost of the equipment. During the up-down movement of the cantilever, the transmission belt and the steel belt are completely attached, and there is no mutual friction between the transmission belt and the steel belt, i.e. no wear of the steel belt. There is no relative movement between the transmission belt and the steel belt, which can stably support the steel belt, avoid powder leakage caused by deformation of the steel belt under the pressure of the powder, and improve the sealing performance of the steel belt.

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

[0007] The utility model discloses a sealing structure of forming cylinder, including forming cylinder, the longitudinal setting of forming cylinder has forming cylinder opening, the clamping of cantilever has in forming cylinder opening, the one end of cantilever extends out forming cylinder, the other end of cantilever extends to forming cylinder and is sequentially provided with guiding mechanism and forming platform on it, be connected with the sealing unit for sealing forming cylinder opening on guiding mechanism, and the other end is wound on guiding mechanism and is connected with the bottom of forming cylinder,

[0008] The sealing unit includes a steel belt and a transmission belt, the sealing surface of the steel belt is completely attached to the sealing surface of the transmission belt.

[0009] Further limit, the width of the steel belt is greater than the width of the forming cylinder opening.

[0010] Further limit, the top of the forming cylinder opening is provided with an upper clamping piece, and the sealing unit is fixedly connected to the top of the forming cylinder opening through the upper clamping piece; the bottom of the forming cylinder is provided with a lower clamping piece, and the sealing unit is fixedly connected to the bottom of the forming cylinder through the lower clamping piece.

[0011] Further limit, the guiding mechanism includes a first guide wheel and a second guide wheel, the first guide wheel and the second guide wheel are connected with the cantilever through a roller mounting seat, and the sealing unit passes around the first guide wheel and the second guide wheel.

[0012] Further limit, the path of the sealing unit in the forming cylinder is: extending downward from the top of the forming cylinder opening along the forming cylinder opening, and sequentially passing around 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] Further limit, the steel belt is tightly attached to the inner wall of the forming cylinder above the forming platform, for sealing the forming cylinder opening; the forming cylinder opening is provided with a clamping groove, the clamping groove is opened on the side wall of the forming cylinder, and the transmission belt is placed in the clamping groove of the forming cylinder opening and is tightly attached to the steel belt.

[0014] Further limit, the transmission belt is a flat belt or a synchronous belt.

[0015] Further limit, the transmission belt is provided with a reinforcing assembly.

[0016] Further limit, the reinforcing assembly is a steel needle or a metal false tooth.

[0017] 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 part, and the cantilever driving part drives forming platform to move along forming cylinder opening by cantilever;Its characterized in that, 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.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] 1, the utility model discloses forming cylinder sealing structure, it is close to the side of steel band sealing surface and set transmission belt, remove the existing complex sealing structure, it is steel band support structure to transmission belt as can reduce the manufacturing cost of equipment, simultaneously, transmission belt and steel band are completely adhered in the process that cantilever moves up and down, and mutual friction cannot be generated between conveyer belt and steel band, that is, steel band cannot be abraded;Transmission belt and steel band cannot generate relative motion, can stably support steel band, avoid that steel band is deformed after being extruded by powder and causes powder leakage, improve the sealing performance of steel band.

[0020] 2, the utility model discloses that sealing unit forms S shape structure in forming cylinder, and steel band is taut by S shape structure, so as to facilitate the natural up-and-down movement of cantilever, further improve the sealing performance of steel band.

[0021] 3, the utility model discloses forming cylinder sealing structure, it also includes upper clamping piece and lower clamping piece, and sealing unit is fixedly connected with the top of forming cylinder opening by upper clamping piece, and sealing unit is fixedly connected with the bottom of forming cylinder by lower clamping piece, realize the fixation of sealing unit and the taut of steel band, guarantee the stability of steel band in the process that cantilever moves up and down.

[0022] 4, in the utility model, transmission belt can be synchronous belt, and it is provided with reinforcing assembly on synchronous belt, increases the support strength of synchronous belt, to realize better support to steel band, improve the stability of steel band sealing. ACCURACY OF DRAWINGS

[0023] Figure 1 It is the front view of the longitudinal section of the utility model discloses forming cylinder sealing structure;

[0024] Figure 2 It is the top view of the horizontal section of the utility model discloses forming cylinder sealing structure;

[0025] Figure 3 It is the axonometric drawing of the utility model discloses forming cylinder sealing structure;

[0026] Figure 4 It is the schematic diagram of steel needle on synchronous belt;

[0027] Figure 5 Schematic diagram for setting metal false teeth on the synchronous belt;

[0028] Figure 6 Schematic diagram for the concave-convex connection of two synchronous belts;

[0029] Figure 7 Schematic diagram for the flat belt;

[0030] Wherein, 1 - upper clamping part, 2 - steel belt, 3 - transmission belt, 31 - synchronous belt, 311 - convex, 312 - groove, 313 - steel needle, 314 - metal false teeth, 32 - flat belt, 4 - forming platform, 5 - guide mechanism, 51 - first guide wheel, 52 - second guide wheel, 6 - cantilever, 7 - lower clamping part, 8 - forming cylinder, 9 - powder material, 10 - forming cylinder opening. DETAILED DESCRIPTION

[0031] The technical scheme of the utility model will be further explained and described below in combination with the drawings and embodiments, but the utility model is not limited to the following described embodiments.

[0032] Referring to Figure 1 , Figure 2 and Figure 3 , the utility model discloses a forming cylinder sealing structure, including forming cylinder 8, along the longitudinal direction of forming cylinder 8 and be provided with forming cylinder opening 10, the interlocking of forming cylinder opening 10 in the cantilever 6 of forming cylinder 8, the other end of cantilever 6 extends to the inside of forming cylinder 8 and its upper sequentially and be provided with guide mechanism 5 and forming platform 4, be connected with sealing unit on guide mechanism 5, one end of sealing unit is fixed at the top of forming cylinder opening 10, the other end of sealing unit is wound on guide mechanism 5 and is connected with the bottom of forming cylinder 8, sealing unit includes steel belt 2 and transmission belt 3, transmission belt 3 and the sealing surface of steel belt 2 complete adhesion, the sealing surface of steel belt 2 refers to the side of steel belt 2 and the adhesion of the cylinder wall of forming cylinder 8.

[0033] Referring to Figure 2 , steel belt 2 is located in the upper section of forming platform and is tightly adhered to the inner wall of forming cylinder, is used for the sealing of forming cylinder opening 10, is provided with clamping groove on both sides of forming cylinder opening 10, clamping groove is opened on the side wall of forming cylinder 8, transmission belt 3 and steel belt 2 tightly adhere and its both sides are extended to the clamping groove of both sides of forming cylinder opening 10 respectively, clamping groove is positioned to transmission belt 3, and transmission belt 3 supports steel belt 2.

[0034] Specifically, the guide mechanism 5 includes a first guide wheel 51 and a second guide wheel 52 arranged side by side, and the first guide wheel 51 and the second guide wheel 52 are both arranged above the cantilever 6, and the path of the sealing unit in the forming cylinder 8 is: sequentially extending from one side close to the forming cylinder opening 10, passing through the bottom of the first guide wheel 51 and the top of the second guide wheel 52, and extending to the other side away from the forming cylinder opening 10, forming an S-shaped structure.

[0035] A roller mounting seat is arranged on the cantilever 6, and the first guide wheel 51 and the second guide wheel 52 are both connected with the cantilever 6 through the roller mounting seat.

[0036] The utility model discloses get rid of the existing complex sealing structure, and the transmission belt 3 is used as the support structure of steel band 2 can reduce the manufacturing cost of equipment, and in the process of up and down movement of cantilever 6, transmission belt 3 and steel band 2 are completely attached, and transmission belt 3 and steel band 2 will not produce mutual friction, that is, will not produce abrasion to steel band 2, transmission belt 3 and steel band 2 will not produce relative movement, can stably support steel band 2, avoid that steel band 2 is deformed after being extruded by powder and causes powder leakage, improve the sealing performance of steel band 2.

[0037] The utility model discloses setting up upper clamping piece 1 at the top of forming cylinder opening 10, and one end of sealing unit is fixedly connected at the top of forming cylinder opening 10 through upper clamping piece 1, setting up lower clamping piece 7 at the bottom of forming cylinder 8, and the other end of sealing unit is fixedly connected at the bottom of forming cylinder 8 through lower clamping piece 7, realize the fixation of sealing unit and the tautness of steel band 2 through upper clamping piece 1 and lower clamping piece 7, guarantee the stability of steel band 2 in the process of up and down movement of cantilever 6. The fixed connection mode can be any one mode known to those skilled in the art such as clamping, cementing and tensioning.

[0038] In the utility model, cantilever 6 is connected with cantilever drive part, and the cantilever drive part drives forming platform 4 to move along forming cylinder opening 10 through cantilever 6, and powder material 9 is laid layer by layer above forming platform 4, and is melted layer by layer through laser according to specific path, and the printing of part is carried out. The specific cantilever drive part can be servo motor or other equipment known to those skilled in the art which can drive linearly.

[0039] In the utility model, the width of steel band 2 is greater than the width of forming cylinder opening 10, so that the forming cylinder opening 10 is better sealed.

[0040] In the utility model, the width of transmission belt 3 is adapted to the width of forming cylinder opening 10, on the one hand, the transmission belt 3 supports the steel band 2, and on the other hand, the steel band 2 will not rub against the forming cylinder 8 during movement, and the stability of the steel band 2 is not affected.

[0041] Referring to Figure 7As an embodiment of the utility model, the transmission belt 3 is a flat belt 32, that is, the surface of the flat belt 32 is completely attached to the surface of the steel belt 2, and the flat belt 32 moves synchronously with the steel belt 2 to support the steel belt 2.

[0042] Referring to Figure 4 and Figure 5 As another embodiment of the utility model, the transmission belt 3 is a synchronous belt 31, wherein one surface of the synchronous belt 31 is a plane, and the other surface is provided with a plurality of protrusions 311 arranged side by side, and a groove 312 is formed between the adjacent two protrusions 311; in use, the plane of the synchronous belt 31 is completely attached to the surface of the steel belt 2, and the synchronous belt 31 moves synchronously with the steel belt 2 to support the steel belt 2.

[0043] Preferably, a reinforcing assembly is arranged on the synchronous belt 31.

[0044] Referring to Figure 4 As an embodiment of the utility model, the reinforcing assembly is a steel needle 313 arranged on the protrusion 311, or a steel needle 313 arranged in the groove 312, or a steel needle 313 arranged on the protrusion 311 and in the groove 312; specifically, the connection mode of the steel needle 313 and the protrusion 311 or the steel needle 313 and the groove 312 is plug-in connection.

[0045] Referring to Figure 5 As another embodiment of the utility model, the reinforcing assembly is a metal false tooth 314 extending from one surface of the synchronous belt 31 to the other surface of the synchronous belt 31; specifically, the connection mode of the metal false tooth 314 and the synchronous belt 31 and the distribution mode of the metal false tooth 314 on the synchronous belt 31 belong to the technology known to those skilled in the art.

[0046] Referring to Figure 6 As another embodiment of the utility model, the reinforcing assembly can also be another synchronous belt 31 arranged on the back surface (close to the surface of the protrusion 311) of the synchronous belt 31, and the two synchronous belts 31 are connected by the protrusion 311 and the groove 312.

[0047] The utility model also provides an additive manufacturing equipment containing a forming cylinder sealing structure, containing above-mentioned forming cylinder sealing structure, the cantilever 6 is connected with cantilever driving part, and the cantilever driving part drives forming platform 4 to move along forming cylinder opening 10 through cantilever 6;Wherein, the cantilever is single-side drive type structure or double-side drive type structure, when the cantilever 6 is single-side drive type structure, containing one symmetrically arranged sealing structure;When the cantilever 6 is double-side drive type structure, containing two symmetrically arranged forming cylinder sealing structures.

[0048] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The sealing structure of the forming cylinder is characterized by: The invention comprises a forming cylinder (8), a forming cylinder opening (10) is provided along the longitudinal direction of the forming cylinder (8), a cantilever (6) is clamped in the forming cylinder opening (10), one end of the cantilever (6) extends out of the forming cylinder (8), the other end of the cantilever (6) extends into the forming cylinder (8) and a guide mechanism (5) and a forming platform (4) are sequentially provided thereon, a sealing unit for sealing the forming cylinder opening (10) is connected to the guide mechanism (5), one end of the sealing unit is fixed to the top end of the forming cylinder opening (10), and the other end is wound around the guide mechanism (5) and connected to the bottom of the forming cylinder (8); The sealing unit comprises a steel belt (2) and a transmission belt (3), wherein the transmission belt (3) is completely in contact with the sealing surface of the steel belt (2), and 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 (8).

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 (10).

3. The forming cylinder sealing structure according to claim 2, characterized in that: An upper clamping piece (1) is provided at the top end of the forming cylinder opening (10), and the sealing unit is fixedly connected to the top end of the forming cylinder opening (10) through the upper clamping piece (1); a lower clamping piece (7) is provided at the bottom end of the forming cylinder (8), and the sealing unit is fixedly connected to the bottom end of the forming cylinder (8) through the lower clamping piece (7).

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), both of which are connected to the cantilever (6) via a roller mounting seat, and the sealing unit bypasses 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 sealing unit has a path in the forming cylinder (8): extending from the top of the forming cylinder opening (10) downward along the forming cylinder opening (10) and passing through the first guide wheel (51) and the second guide wheel (52) in sequence before being fixed to the bottom of the forming cylinder (8), forming an "S"-shaped distribution.

6. The forming cylinder sealing structure according to claim 1, characterized in that: The steel belt (2) is located above the forming platform (4) and is tightly fitted to the inner wall of the forming cylinder, and is used to seal the forming cylinder opening (10); the forming cylinder opening (10) is provided with a card slot, and the card slot is opened on the side wall of the forming cylinder (8); the transmission belt (3) is placed in the card slot of the forming cylinder opening (10) and is tightly fitted to the steel belt (2).

7. The forming cylinder sealing structure according to claim 1, characterized in that: The transmission belt (3) is a flat belt (32) or a synchronous belt (31).

8. The forming cylinder sealing structure according to claim 7, characterized in that: The transmission belt (3) is provided with a reinforcement component.

9. The forming cylinder sealing structure according to claim 8, characterized in that: The reinforcing component is a steel needle (313) or a metal artificial tooth (314).

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 9, wherein the cantilever (6) is connected to a cantilever driving member, and the cantilever driving member drives the forming platform (4) to move along the forming cylinder opening (10) through the cantilever (6); characterized in that The cantilever (6) is a single-side driven structure or a double-side driven structure. When the cantilever is a double-side driven structure, it comprises two symmetrically arranged forming cylinder sealing structures.

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