Bidirectional powder spreading scraper mechanism capable of effectively inhibiting flying dust

Abstract

The utility model relates to a two-way powder laying scraper mechanism capable of effectively restraining dust raising. The two-way powder laying scraper mechanism comprises a material uniformizing groove, a mounting plate body, a scraper mounting plate, a scraper assembly, a front material falling channel, a rear material falling channel and a turnover door assembly. The material uniformizing groove is formed in the upper portion of the mounting plate body, and a plurality of left guide blanking channels and right guide blanking channels which are equally divided front and back are formed in the material uniformizing groove; a rear blanking channel, a scraper mounting plate and a front blanking channel are sequentially and fixedly mounted on the lower surface of the mounting plate body from left to right, the rear blanking channel and the front blanking channel are located on the two edges of the bottom of the mounting plate body, and the scraper mounting plate is located in the center of the bottom of the mounting plate body. According to the scheme, the turnover door assembly which is closed when not triggered and opened when triggered is used, a traditional transverse baffle collision displacement reversing mode is replaced, transverse space does not need to be occupied, and a front discharging channel and a rear discharging channel can be completely staggered from a scraper installation space.

Description

Technical Field

[0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a bidirectional powder spreading scraper mechanism which can effectively suppress dust. Background Art

[0002] With the rapid development of 3D printing technology, metal 3D printing technology has received more and more attention. As one of the main technologies for forming metal 3D parts, laser selective melting (SLM) technology has also been widely and deeply studied.

[0003] In 3D printing, the traditional single-scraper bidirectional powder spreading device generally adopts the method of horizontal baffle impact reversing. In order to facilitate the replacement of the scraper, the powder release position in the impact device is generally higher than the scraper installation position. This causes the powder to generate dust due to the height difference and gravity impact when it is released. The dust is deposited on various mounting surfaces, screw holes, and step surfaces of the powder spreading device. When the accumulated amount is too much, it is extremely easy to fall under the influence of the slight vibration generated when the powder spreader is started and operated. When the fallen powder is opposite to the powder spreading direction and accumulates on the printing surface, it will directly lead to the failure of the forming of the current layer of the workpiece and produce raised metal lumps, which will damage the scraper and have a very serious impact.

[0004] Therefore, in the process of forming metal parts with the SLM technology using top powder feeding, a single scraper bidirectional powder spreading device is provided to overcome the above difficulties, thereby enabling the bidirectional powder spreading function of the SLM equipment to operate stably. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a two-way powder spreading scraper mechanism that effectively suppresses dust, comprising a material balancing trough, a mounting plate body, a scraper mounting plate, a scraper assembly, a front material dropping channel, a rear material dropping channel, and a flip door assembly;

[0007] The material balancing trough is installed above the mounting plate body, and a plurality of left guide blanking channels and right guide blanking channels are opened inside the material balancing trough and are evenly divided front and back;

[0008] The lower surface of the mounting plate body is fixedly mounted with a rear blanking channel, a scraper mounting plate and a front blanking channel in sequence from left to right, the rear blanking channel and the front blanking channel are located at two edges of the bottom of the mounting plate body, and the scraper mounting plate is located at the center of the bottom of the mounting plate body;

[0009] A flip door assembly is installed on the outer side of the bottom of the rear blanking channel. The flip door assembly consists of a rotating shaft, a flip door body and a spring. The flip door body is rotatably connected to the outer side of the bottom end of the rear blanking channel. The rotating shaft is the hinge point between the flip door body and the rear blanking channel.

[0010] As an optimal technical solution for a bidirectional powder spreading scraper mechanism that effectively suppresses dust, a scraper assembly is installed at the bottom of the scraper mounting plate, and the scraper assembly consists of a powder spreading scraper and a clamp.

[0011] As an optimal technical solution for a bidirectional powder spreading scraper mechanism that effectively suppresses dust, the front blanking channel is located at the front side of the operation of the entire device, and the internal space of the front blanking channel is connected to the right guide blanking channel.

[0012] As an optimal technical solution for a bidirectional powder spreading scraper mechanism that effectively suppresses dust, the rear blanking channel is located at the rear side of the operation of the entire device, and the internal space of the rear blanking channel is connected to the left guide blanking channel.

[0013] As an optimal technical solution for a bidirectional powder spreading scraper mechanism that effectively suppresses dust, the longitudinal length of the flip door body is greater than the longitudinal length of the scraper assembly and the front blanking channel.

[0014] As an optimal technical solution for a bidirectional powder spreading scraper mechanism that effectively suppresses dust, one end of the spring is mounted on the scraper mounting plate, and the other end of the spring is mounted on the flip door body.

[0015] Beneficial effects of the present invention:

[0016] 1. This solution uses a flip door assembly that closes when not triggered and opens when triggered, replacing the traditional horizontal baffle impact displacement reversing method, without occupying horizontal space, so that the front and rear material drop channels can be completely staggered from the scraper installation space;

[0017] 2. The distance between the bottom opening of the front and rear blanking channels in this solution and the printing plane is very small. Most of the dust generated when the powder inside the channel is released is blocked by the inner wall of the channel itself and cannot escape. Only a very small amount of dust will escape at the end of the channel. However, due to the limited release space, it cannot leave the channel too far, so it will not accumulate in the dead corners of the powder spreading device, which can ensure the stable operation of two-way powder spreading.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0021] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 .

[0022] Figure 3 It is a top view schematic diagram of the left guide blanking channel and the right guide blanking channel of the present invention.

[0023] Figure 4 The present invention is schematically shown in FIG. Figure 1 .

[0024] Figure 5 The present invention is schematically shown in FIG. Figure 2 .

[0025] Figure 6 It is a schematic diagram of the flip door body of the present invention after contacting with the stopper.

[0026] Figure 7 For the present invention Figure 6 Cutaway diagram.

[0027] Figure numerals: 100, material equalizing trough; 101, left guide blanking channel; 102, right guide blanking channel; 200, mounting plate body; 300, scraper mounting plate; 400, scraper assembly; 500, front blanking channel; 600, rear blanking channel; 700, flip door assembly; 701, rotating shaft; 702, flip door body; 703, spring. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] Example

[0033] Reference Figures 1 to 7, is an embodiment of the present invention, which provides a two-way powder spreading scraper mechanism that effectively suppresses dust, including a material balancing trough 100, a mounting plate body 200, a scraper mounting plate 300, a scraper assembly 400, a front material dropping channel 500, a rear material dropping channel 600, and a flip door assembly 700; the material balancing trough 100 is installed above the mounting plate body 200, and a plurality of left guide dropping channels 101 and right guide dropping channels 102 that are evenly divided front and back are opened inside the material balancing trough 100, which can evenly separate the powder released by the upper powder feeding mechanism to the front and back The rear blanking channel 600 and the front blanking channel 500 are fixedly installed on the lower surface of the mounting plate body 200 from left to right in sequence. The rear blanking channel 600 and the front blanking channel 500 are located at the two edges of the bottom of the mounting plate body 200, and the scraper mounting plate 300 is located at the center of the bottom of the mounting plate body 200; a flip door assembly 700 is installed on the outer side of the bottom of the rear blanking channel 600. When the scraper assembly 400 moves forward along the overall device, the powder enters in sequence. The powder enters the equalizing trough 100, the left guide blanking channel 101 and the rear blanking channel 600. When the powder falls into the rear blanking channel 600, it is blocked by the flip door assembly 700. At this time, the powder is stored inside the rear blanking channel 600. The flip door assembly 700 is composed of a rotating shaft 701, a flip door body 702 and a spring 703. The flip door body 702 is rotatably connected to the outer side of the bottom end of the rear blanking channel 600. The rotating shaft 701 is the hinge point between the flip door body 702 and the rear blanking channel 600. When the overall device is in the forward state, the flip door body 702 is in a state of being tightened by spring 703, and the flip door body 702 and the rear material drop channel 600 together form a closed space, so that the powder entering the rear material drop channel 600 is blocked by the flip door body 702 and stored inside the rear material drop channel 600. When the powder spreading action of the whole device is finished, when the scraper assembly 400 runs to the front side of the printing plane, the block configured on the printing plane pushes the flip door body 702 open, and the powder inside the rear material drop channel 600 is released to the printing plane, thereby realizing the backward powder spreading action of the whole device.

[0034] Specifically, a scraper assembly 400 is installed at the bottom of the scraper mounting plate 300. The height of the scraper assembly 400 can be adjusted up and down in advance. The scraper assembly 400 is composed of a powder spreading scraper and a clamp, and is used to spread the powder released from the front drop channel 500 and the rear drop channel 600 to the printing plane.

[0035] Specifically, the front blanking channel 500 is located at the front side of the overall device, and the internal space of the front blanking channel 500 is communicated with the right guide blanking channel 102, so as to avoid the position of the scraper assembly 400, and the powder entering the front blanking channel 500 from the material balancing trough 100 through the right guide blanking channel 102 is directly released to the printing plane, so as to realize the powder spreading action from back to front;

[0036] Specifically, the rear blanking channel 600 is located at the rear side of the overall device. The internal space of the rear blanking channel 600 is connected to the left guide blanking channel 101, and also avoids the position of the scraper assembly 400. When the scraper assembly 400 moves along the overall device, the powder enters the equalizing trough 100, the left guide blanking channel 101 and the rear blanking channel 600 in sequence.

[0037] Specifically, the longitudinal length of the flip door body 702 is greater than the longitudinal length of the scraper assembly 400 and the front material drop channel 500, so that when the entire device moves forward to the end of the powder spreading action, the stopper configured on the printing plane can squeeze and push the flip door body 702 open;

[0038] Specifically, one end of the spring 703 is mounted on the scraper mounting plate 300 , and the other end of the spring 703 is mounted on the flip door body 702 .

[0039] Through this implementation, it can be achieved that: first, the product is stopped at the powder receiving position of the metal 3D printing device, and the upper powder feeding device of the metal 3D printing device releases the amount of powder used for two-layer printing into the equalizing trough 100. The equalizing trough 100 is designed with a left guide blanking channel 101 and a right guide blanking channel 102 that are evenly divided into front and back, which divide the powder into two equal parts and release it evenly into the front blanking channel 500 and the rear blanking channel 600; the powder in the front blanking channel 500 passes through the flow channel inside the channel and the opening at the bottom and falls directly onto the printing plane, and the powder entering the rear blanking channel 600 is blocked by the closed flip door assembly 700 and stored in the rear blanking channel 600. At this time, the powder spreading device moves from back to front, and the scraper assembly 400 pushes the front blanking channel 5 00 is spread out on the printing area and stops at the stop position in front of the equipment, waiting for the equipment to print; a stop block is set at the stop position in front of the equipment, and when the powder spreading device is in motion, the flip door body 702 at the bottom of the rear blanking channel 600 will contact the stop block and be gradually opened until the powder spreading device reaches the stop position, the flip door body 702 is fully opened, and the powder stored in the rear blanking channel 600 is released to the printing plane; when the layer printing is completed, the powder spreading device moves from front to back to the powder receiving position. During this process, the scraper spreads the powder released in the rear blanking channel 600 on the printing area, and after the flip door body 702 leaves the stop block, it fits with the rear blanking channel 600 under the action of the spring 703 to form a closed space, and two-way powder spreading is completed.

[0040] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A two-way powder spreading scraper mechanism that effectively suppresses dust, characterized by: It comprises a material balancing trough (100), a mounting plate body (200), a scraper mounting plate (300), a scraper assembly (400), a front material dropping channel (500), a rear material dropping channel (600), and a flip door assembly (700); The material balancing trough (100) is installed above the mounting plate body (200), and a plurality of left guide blanking channels (101) and right guide blanking channels (102) evenly divided front and back are provided inside the material balancing trough (100); The lower surface of the mounting plate body (200) is fixedly mounted with a rear blanking channel (600), a scraper mounting plate (300) and a front blanking channel (500) in sequence from left to right, wherein the rear blanking channel (600) and the front blanking channel (500) are located at two edges of the bottom of the mounting plate body (200), and the scraper mounting plate (300) is located at the center of the bottom of the mounting plate body (200); A flip door assembly (700) is installed on the outer side of the bottom of the rear material drop channel (600), and the flip door assembly (700) is composed of a rotating shaft (701), a flip door body (702) and a spring (703). The flip door body (702) is rotatably connected to the outer side of the bottom end of the rear material drop channel (600), and the rotating shaft (701) is the hinge point between the flip door body (702) and the rear material drop channel (600).

2. The two-way powder spreading scraper mechanism for effectively suppressing dust according to claim 1 is characterized in that: A scraper assembly (400) is installed at the bottom of the scraper mounting plate (300), and the scraper assembly (400) is composed of a powder spreading scraper and a clamp.

3. The two-way powder spreading scraper mechanism for effectively suppressing dust according to claim 1 is characterized in that: The front blanking channel (500) is located at the front side of the operation of the entire device, and the internal space of the front blanking channel (500) is communicated with the right guide blanking channel (102).

4. The two-way powder spreading scraper mechanism for effectively suppressing dust according to claim 1 is characterized in that: The rear blanking channel (600) is located at the rear side of the operation of the entire device, and the internal space of the rear blanking channel (600) is communicated with the left guide blanking channel (101).

5. The two-way powder spreading scraper mechanism for effectively suppressing dust according to claim 1 is characterized in that: The longitudinal length of the flip door body (702) is greater than the longitudinal lengths of the scraper assembly (400) and the front material drop channel (500).

6. The two-way powder spreading scraper mechanism for effectively suppressing dust according to claim 1 is characterized in that: One end of the spring (703) is mounted on the scraper mounting plate (300), and the other end of the spring (703) is mounted on the flip door body (702).

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