Metal powder bonding forming device

Abstract

A metal powder bonding forming device is characterized by comprising a bottom plate, a mixing barrel, a stirring assembly, a conveying assembly and an injection assembly, the mixing barrel is installed on a supporting frame arranged on the bottom plate, the stirring assembly is installed on the mixing barrel, and a discharging opening in the bottom of the mixing barrel is connected with the conveying assembly; a material outlet of the material conveying assembly is connected to a material inlet of the injection assembly, and heating assemblies are arranged on the outer wall of the mixing barrel and the outer portion of the injection assembly respectively. The heating assemblies are arranged on the outer portion of the mixing barrel where the metal powder and the adhesive are mixed and on the outer portion of the injection barrel where the metal powder and the adhesive are injected into a mold for forming operation respectively. The processing quality is prevented from being influenced by low temperature; and the inner wall brush which is in contact with the inner wall of the mixing cylinder is additionally arranged, so that resource waste caused by the fact that metal powder and an adhesive are attached to the inner wall is reduced.

Description

Technical Field

[0001] This utility model relates to the field of metal powder processing technology, and in particular to a metal powder bonding and molding device. Background Technology

[0002] The principle of metal powder bonding molding mainly includes the following two steps: First, the metal powder needs to be uniformly mixed with organic binder to form a feedstock with good flowability. This step is the key to ensure that the metal powder can be smoothly injected into the mold and form the required shape and size. Second, the feedstock is injected into the mold through injection molding technology to obtain a green body with a specific shape and size.

[0003] In existing molding equipment, a mixing drum is used to mix metal powder and binder. During the mixing process, due to the adhesive properties of the binder, it is easy for it to stick to the walls of the mixing drum while mixing with the metal powder. In addition, the low temperature of the mixing environment during the mixing process makes the mixture less fluid, resulting in greater resistance to the movement of the mixing rod, which leads to poor mixing effect and affects the quality of subsequent processing and molding. Furthermore, during the injection molding process, the material fed into the injection drum becomes cold due to heat loss, and solidification occurs before it is injected into the mold, resulting in irregular injection and affecting the processing quality.

[0004] In view of the above problems, we propose a metal powder bonding and molding device. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a metal powder bonding and molding device. Heating components are installed on the outside of the mixing cylinder for mixing metal powder and adhesive, as well as on the outside of the injection cylinder for injection molding, to prevent low temperatures from affecting processing quality.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A metal powder bonding and molding apparatus, characterized in that it includes a base plate, a mixing cylinder, a stirring assembly, a conveying assembly, and an injection assembly. The mixing cylinder is mounted on a support frame on the base plate, and the stirring assembly is mounted on the mixing cylinder. The discharge port at the bottom of the mixing cylinder is connected to the conveying assembly, and the discharge port of the conveying assembly is connected to the inlet of the injection assembly. Heating components are provided on the outer wall of the mixing cylinder and on the exterior of the injection assembly.

[0008] The stirring assembly consists of a stirring motor, a stirring shaft, stirring rods, a connecting rod, and an inner wall brush. The stirring motor is mounted on the mixing drum, and the output end of the stirring motor is connected to the stirring shaft. Multiple sets of stirring rods are arranged at intervals on the stirring shaft. The inner wall brush is in contact with the inner wall of the mixing drum and is mounted on the stirring shaft via the connecting rod.

[0009] The material conveying assembly consists of a material conveying box, a material conveying motor, and spiral blades. A rotating shaft is installed inside the material conveying box via bearings. The rotating shaft is equipped with spiral blades. One end of the rotating shaft extends out of the material conveying box and is connected to the output end of the material conveying motor.

[0010] The injection assembly includes an injection barrel, a plunger, and an electric push rod. The telescopic end of the electric push rod passes through the rear side of the injection barrel and extends into and connects with the plunger, which is installed inside the injection barrel.

[0011] The heating assembly includes a heating sleeve and an electric heating wire. The heating sleeve is installed on the outer wall of both the mixing cylinder and the injection cylinder. The electric heating wire is arranged in a spiral winding structure on the inner wall of the heating sleeve.

[0012] Furthermore, the electric heating wire is electrically connected to an external electric heater, and the electric heater controls the heating start of the electric heating wire.

[0013] Furthermore, the feed box and injection cylinder are mounted on the base plate via a fixing bracket.

[0014] Furthermore, the electric push rod is mounted on a mounting frame, and the top of the mounting frame is provided with a motor base, on which the material conveying motor is mounted.

[0015] The beneficial effects of this utility model are:

[0016] This invention equips both the outside of the mixing cylinder for mixing metal powder and binder and the outside of the injection cylinder for injection molding. During processing, the heating sleeve is heated by activating the electric heating wire, so that the mixing cylinder and the injection cylinder are both at a suitable processing temperature. This avoids the problem of low temperature affecting the mixing and stirring process, or low temperature during injection causing irregular molding, thus resulting in low processing quality.

[0017] The mixing assembly designed in this utility model has an inner wall brush that is in contact with the inner wall of the mixing cylinder. During the mixing process, the inner wall brush rotates with the mixing shaft and scrapes the inner wall of the mixing cylinder, reducing the adhesion of metal powder and adhesive to the inner wall, thereby reducing resource waste.

[0018] This invention uses spiral blades in the feeding assembly to uniformly transport the mixed feed material into the injection cylinder. During the feeding process, the mixed material is also stirred while being transported, further ensuring uniform mixing and improving processing quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a metal powder bonding and molding device according to the present invention.

[0020] Figure 2 This is a schematic cross-sectional view of a metal powder bonding and molding device according to the present invention.

[0021] As shown in the figure: 1. Base plate, 2. Support frame, 3. Mixing cylinder, 31. Feed inlet, 41. Stirring motor, 42. Stirring shaft, 43. Stirring rod, 44. Inner wall brush, 45. Connecting rod, 51. Feed box, 52. Feeding motor, 53. Rotating shaft, 54. Spiral blade, 61. Injection cylinder, 62. Electric push rod, 63. Plunger, 71. Heating sleeve, 72. Electric heating wire, 8. Fixing frame, 9. Mounting frame. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1

[0026] As shown in the figure, a mixing cylinder 3 is installed on a support frame 2 on a base plate 1. A stirring assembly is installed on the mixing cylinder 3. A stirring motor 41 in the stirring assembly is installed on the mixing cylinder 3. The output end of the stirring motor 41 is connected to a stirring shaft 42. Multiple stirring rods 43 are arranged at intervals on the stirring shaft 42. An inner wall brush 44 is installed inside the mixing cylinder 3. The inner wall brush 44 is placed in contact with the inner wall of the mixing cylinder 3. The inner wall brush 44 is installed on the stirring shaft 42 through a connecting rod 45. The mixing cylinder 3 is provided with a feed port 31 for feeding materials.

[0027] The discharge port at the bottom of the mixing cylinder 3 is connected to the inlet of the conveying box 51 in the conveying assembly. A rotating shaft 53 is mounted inside the conveying box 51 via bearings. The rotating shaft 53 has spiral blades 54. One end of the rotating shaft 53 extends out of the conveying box 51 and connects to the output end of the conveying motor 52. The conveying motor 52 is mounted on a mounting bracket 9 on the base plate 1 via a motor mount. The rotating spiral blades 54 in the conveying box 51 uniformly convey the mixed material into the injection cylinder 61. During the conveying process, the rotating shaft 53 drives the spiral blades 54 to rotate, achieving simultaneous stirring and conveying of the mixed material, further ensuring uniform mixing and improving processing quality.

[0028] The discharge port at the other end of the feed box 51 is connected to the feed port of the injection cylinder 61. The telescopic end of the electric push rod 62 used for injection molding passes through the rear side of the injection cylinder 61 and extends into the injection cylinder 61, connecting with the plunger 63 inside. The electric push rod 62 is mounted on the mounting bracket 9. During injection, the mixed feed material is conveyed into the injection cylinder 61, and the telescopic end of the electric push rod pushes the plunger 63 inside the injection cylinder 61 to move, injecting the feed material in the injection cylinder 61 into the mold cavity of the closed mold.

[0029] Heating sleeves 71 are installed on the outer wall of mixing cylinder 3 and the outer wall of injection cylinder 61. The inner wall of the heating sleeve 71 is provided with an electric heating wire 7 in a spiral winding structure. The electric heating wire 72 needs to be electrically connected to an external electric heater, and the electric heater controls the heating wire 71 to heat.

[0030] Furthermore, the feed box 51 and the injection cylinder 61 are mounted on the base plate 1 via the fixing bracket 8.

[0031] Example 2

[0032] In the processing of this utility model, the electric heating wire 72 inside the heating sleeve 71 is first activated by an electric heater to deheat the heating sleeve 71, so that the heating sleeve 71 is at a certain temperature, and the mixing cylinder 3 and the injection cylinder 61 are both at a suitable processing temperature. The temperature during mixing and stirring is set within the range of 75 to 100 degrees Celsius to avoid the binder's poor fluidity due to low temperature during mixing and stirring, which would result in high stirring resistance and affect the mixing. The injection temperature is controlled at around 140 to 150 degrees Celsius to avoid the feed material solidifying or having poor fluidity in the injection cylinder 61 due to excessively low temperature, which would cause irregular molding in the mold and result in low processing quality.

[0033] Raw materials are fed into the mixing drum 3 through the feed inlet 31. The stirring motor 41 controls the stirring rod 43 to stir and mix the materials. By adding an inner wall brush 44 that is in contact with the inner wall of the mixing drum 3, the inner wall brush 44 rotates with the stirring shaft 42 during the stirring process, and performs a scraping operation on the inner wall of the mixing drum 3, reducing the adhesion of metal powder and adhesive to the inner wall and reducing resource waste.

[0034] After being mixed in the mixing cylinder 3, the feed material enters the conveying box 51. It is then conveyed to the injection cylinder 61 while being stirred by the spiral blade 54. The electric push rod 62 pushes the plunger 63 forward, injecting the feed material in the injection cylinder 61 into the mold, thus completing the bonding molding process.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A metal powder adhesive forming apparatus, characterized by It includes a bottom plate, a mixing cylinder, a stirring assembly, a conveying assembly and an injection assembly, the mixing cylinder is installed on the support frame arranged on the bottom plate, the stirring assembly is installed on the mixing cylinder, the discharge port at the bottom of the mixing cylinder is connected with the conveying assembly, the discharge port of the conveying assembly is connected with the feeding port of the injection assembly, and the outer wall of the mixing cylinder and the outer wall of the injection assembly are both provided with heating assemblies.

2. A metal powder adhesive forming apparatus according to claim 1, wherein The stirring assembly is composed of a stirring motor, a stirring shaft, stirring rods, a connecting rod and an inner wall brush, the stirring motor is installed on the mixing cylinder, the output end of the stirring motor is connected with the stirring shaft, a plurality of groups of stirring rods are arranged on the stirring shaft at intervals, the inner wall brush is in contact with the inner wall of the mixing cylinder, and the inner wall brush is installed on the stirring shaft through the connecting rod.

3. A metal powder adhesive forming apparatus according to claim 1, wherein The conveying assembly is composed of a conveying box, a conveying motor and helical blades, a rotating shaft is arranged in the conveying box through a bearing, the rotating shaft is provided with the helical blades, and one end of the rotating shaft extends out of the conveying box and is connected with the output end of the conveying motor.

4. A metal powder adhesive forming apparatus according to claim 1, wherein The injection assembly comprises an injection cylinder, a plunger and an electric push rod, the telescopic end of the electric push rod extends through the rear side of the injection cylinder and is connected with the plunger, and the plunger is installed in the injection cylinder.

5. A metal powder adhesive forming apparatus according to claim 4, wherein The heating assembly comprises a heating sleeve and an electric heating wire, the heating sleeve is installed on the outer wall of the mixing cylinder and the outer wall of the injection cylinder, and the electric heating wire is arranged in the inner wall of the heating sleeve in a helical winding structure.

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