Powder falling hopper convenient to disassemble

Abstract

The utility model relates to the technical field of additive manufacturing, in particular to a powder falling hopper convenient to disassemble, which comprises a powder falling hopper main body, a fixed pressing plate is arranged on one side of the powder falling hopper main body, the fixed pressing plate is fixedly connected with a forming chamber bottom plate through a fastener, a movable pressing plate is arranged on the other side of the powder falling hopper main body, and the movable pressing plate is detachably connected with the forming chamber bottom plate through a plurality of cam handles. Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects that the dovetail groove type powder falling hopper is adopted, and the quick-release pressing structure which is convenient and quick to detach is used, so that the powder falling hopper is quickly detached and replaced on the premise of ensuring the sealing.

Description

Technical Field

[0001] The utility model relates to the technical field of additive manufacturing, and in particular to a powder hopper which is easy to disassemble. Background Art

[0002] Additive manufacturing uses different types of powders for printing, so that parts can obtain the properties of various materials to meet the different needs of customers. In order to avoid contamination between different types of powders and affect the performance of printed parts, the powder circulation path must be cleaned when the powder is switched. Due to the relatively small space for powder circulation, some parts, such as the powder hopper used to recover overflow powder during printing, cannot be cleaned on the equipment and must be removed for cleaning. The convenience of disassembling and cleaning the powder hopper restricts the efficiency of powder replacement and affects the product delivery cycle.

[0003] See also Figure 1 The existing powder hopper uses a rectangular boss flange with a mounting hole. The flange is welded to the powder hopper body and connected to the bottom plate of the forming chamber by screws. The two are sealed by squeezing the sealing strip to prevent air and powder leakage. When installing and removing the powder hopper, in order to prevent the powder hopper from falling, one person needs to tighten the screws and the other person needs to assist in supporting the powder hopper, which is labor-intensive. Due to the limited space on the equipment, the rotation angle of the hexagonal wrench is limited, and it is inconvenient to remove the screws, and the removal time is long and inefficient. The screws at the front of the front powder hopper are blocked by the sheet metal protection, making it difficult to remove. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art, provide a powder dropping hopper structure that is easy to replace quickly, and ensure a sealed environment during the working process.

[0005] In order to achieve the above object, the utility model provides a powder hopper which is easy to disassemble, comprising

[0006] Powder hopper body;

[0007] A fixed pressure plate is provided on one side of the powder dropping hopper body, and the fixed pressure plate is fixedly connected to the bottom plate of the forming chamber through fasteners. A movable pressure plate is provided on the other side of the powder dropping hopper body, and the movable pressure plate is detachably connected to the bottom plate of the forming chamber through a plurality of cam handles.

[0008] Preferably, the powder dropping hopper body is a dovetail groove flange.

[0009] Preferably, both sides of the top of the dovetail groove flange are provided with inclined surfaces which are 55 degrees to the horizontal plane, and the fixed pressing plate and the movable pressing plate are correspondingly fitted with the inclined surfaces.

[0010] Preferably, the fastener is a hexagon socket screw.

[0011] Preferably, a sealing strip is provided on the surface of the powder dropping hopper body, and the sealing body is in contact with the bottom plate of the forming chamber.

[0012] Preferably: it is characterized in that the bottom plate of the forming chamber begins to have a positioning pin. When the cam handle squeezes the movable pressure plate, the movable pressure plate is fixed to the positioning pin, so that the movable pressure plate squeezes the dovetail groove flange of the powder hopper through the inclined surface, so that the flange is tightly attached to the sealing body between the bottom plate of the forming chamber, thereby realizing quick sealing installation.

[0013] Compared with the prior art, the technical solution proposed in this application has the following beneficial effects: the utility model adopts a dovetail groove type powder hopper and a quick-release clamping structure for convenient and quick disassembly, which realizes the rapid disassembly and replacement of the powder hopper while ensuring sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0015] Figure 1 It is a structural diagram of a powder dropping hopper in the prior art;

[0016] Figure 2 This is a top view of the powder dropping hopper structure of the utility model;

[0017] Figure 3 It is a structural diagram of the dovetail groove flange of the utility model;

[0018] Figure 4 It is a side view of the powder dropping hopper structure of the utility model;

[0019] In the figure: 1. powder hopper body, 2. fixed pressure plate, 3. movable pressure plate, 4. positioning pin, 5. cam handle, 6. fastener, 7. sealing strip. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe and discuss the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings of the utility model. Obviously, what is described here is only a part of the examples of the utility model, not all the examples. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the utility model.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] See also Figures 2 to 4 , This embodiment provides a powder hopper structure that is easy to disassemble and quickly replace, including a powder hopper body; a fixed pressure plate is provided on one side of the powder hopper body, and the fixed pressure plate is fixedly connected to the bottom plate of the forming chamber through a fastener. In this embodiment, the fastener is a hexagon socket screw, and a movable pressure plate is provided on the other side of the powder hopper body, and the movable pressure plate is detachably connected to the bottom plate of the forming chamber through a plurality of cam handles. The powder hopper body is a dovetail groove flange. The top two sides of the dovetail groove flange are respectively provided with inclined surfaces that are 55° to the horizontal plane, and the fixed pressure plate and the movable pressure plate are correspondingly fitted with the inclined surfaces. The fastener is a hexagon socket screw. A sealing strip is provided on the surface of the powder hopper body, and the sealing body is fitted with the bottom plate of the forming chamber. A positioning pin is provided on the bottom plate of the forming chamber. When the cam handle squeezes the movable pressure plate, the movable pressure plate is fixed to the positioning pin, so that the movable pressure plate squeezes the dovetail groove flange of the powder hopper through the inclined surface, so that the flange is tightly attached to the sealing body between the bottom plate of the forming chamber.

[0024] Specifically, the powder hopper flange uses a 55° dovetail groove type flange, with one side of the flange bevel pressed against the fixed pressure plate, and the other side pressed against the movable pressure plate. By tightening the cam handle and squeezing the movable pressure plate, the powder hopper is subjected to the upward force of the vertical bevel, and is clamped by the movable pressure plate and the fixed pressure plate, while being pressed against the bottom plate of the forming chamber, squeezing the sealing strip and playing a sealing role. In order to prevent the movable pressure plate and the powder hopper from retreating during squeezing, resulting in loose pressing, positioning pins are added to limit the front and rear positions of the movable pressure plate, so that the movable pressure plate can only move up and down within a certain range close to the bottom plate of the forming chamber.

[0025] During installation: The steps are as follows:

[0026] 1) Use hexagon socket screws to fix the fixed pressure plate to the bottom plate of the forming chamber;

[0027] 2) Install the positioning pin. The mounting surface of the positioning pin is M6 thread, the positioning surface diameter is 6mm and the length is 2mm;

[0028] 3) Use the cam handle to fix the movable pressing plate, and there is no need to screw on the cam handle, so that there is a certain gap between the movable pressing plate and the bottom plate of the forming chamber;

[0029] 4) Place one side of the powder hopper on the fixed pressure plate, push the movable pressure plate upwards, fix it with the positioning pin, and press down the cam handle to lock it.

[0030] When disassembly and replacement are required, the steps are as follows:

[0031] 1) Loosen the cam handle to move the movable pressure plate downward and away from the positioning pin;

[0032] 2) Hold the powder hopper with one hand and pull the movable pressing plate backward with the other hand to take out the powder hopper;

[0033] 3) Place one side of the new powder hopper on the fixed pressure plate, push the movable pressure plate upwards, fix it with the positioning pin, and press down the tug handle to lock it.

[0034] The above describes the specific embodiments of the utility model. It should be understood that the utility model is not limited to the above specific embodiments, and one or more of the above embodiments are combined into one embodiment. Those skilled in the art can make various changes or modifications or combinations within the scope of the claims, which does not affect the essence of the utility model. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A powder hopper that is easy to disassemble, characterized in that: include Powder hopper body; A fixed pressure plate is provided on one side of the powder dropping hopper body, and the fixed pressure plate is fixedly connected to the bottom plate of the forming chamber through fasteners. A movable pressure plate is provided on the other side of the powder dropping hopper body, and the movable pressure plate is detachably connected to the bottom plate of the forming chamber through a plurality of cam handles.

2. The easily disassembled powder hopper according to claim 1, characterized in that: The powder dropping hopper body is a dovetail groove flange.

3. The easily disassembled powder hopper according to claim 2, characterized in that: Both sides of the top of the dovetail groove flange are respectively provided with inclined surfaces which are 55 degrees to the horizontal plane, and the fixed pressing plate and the movable pressing plate are correspondingly fitted with the inclined surfaces.

4. The easily disassembled powder hopper according to claim 1, characterized in that: The fastener is a hexagon socket screw.

5. The easily disassembled powder hopper according to claim 3, characterized in that: A sealing strip is provided on the surface of the powder dropping hopper body, and the sealing strip is in contact with the bottom plate of the forming chamber.

6. The easily disassembled powder hopper according to claim 3, characterized in that: The bottom plate of the forming chamber is provided with a positioning pin. When the cam handle squeezes the movable pressing plate, the movable pressing plate is fixed to the positioning pin, so that the movable pressing plate squeezes the dovetail groove flange of the powder hopper through the inclined surface, so that the flange is tightly attached to the sealing body between the bottom plate of the forming chamber.

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