Raw material premixing device for 3D printing

Abstract

The utility model belongs to the field of 3D printing insoles, and discloses a 3D printing raw material premixing device which comprises a stirring assembly used for stirring and mixing powder raw materials, and a conveying assembly used for spirally conveying the raw materials is installed on the stirring assembly. The feeding assembly is arranged on the conveying assembly and is used for multi-port continuous mixed feeding and wind impact primary mixing; the feeding assembly comprises an air mixing box, a discharging pipe is arranged at the bottom of the air mixing box, a ventilation net is arranged on the discharging pipe, a plurality of material spraying pipes are evenly arranged on the circumference of the air mixing box, and a material control valve is arranged on one side of each material spraying pipe. According to the raw material premixing device for 3D printing, through the arrangement of multi-port continuous mixed feeding, multiple raw materials are preliminarily mixed during feeding, and the follow-up stirring and mixing speed is increased; through the arrangement of wind impact primary mixing, the primary mixing effect during feeding is improved; by controlling the feeding speed, the requirement for primary mixing of raw materials in different proportions is met.

Description

Technical Field

[0001] The utility model belongs to the field of 3D printing insoles, and in particular relates to a raw material premixing device for 3D printing. Background Art

[0002] 3D printed insoles are personalized insoles made using 3D printing technology. They use equipment such as foot scanners and plantar pressure testers to collect the user's foot pressure and morphological feature data, and then analyze these data in conjunction with professional insole design software to design and customize insole models that meet the user's disease and foot shape. Finally, they are printed and formed using 3D printing technology to produce insoles that fully meet the user's needs. 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis, uses powdered metal or plastic and other bondable materials, and constructs objects by printing layer by layer. Since 3D printing requires the use of multiple materials, a pre-mixing device is required when mixing materials to mix the materials for printing.

[0003] By comparison, a Chinese patent with authorization announcement number CN220517231U discloses a raw material premixing device for 3D printing, including a stirring tank, a mounting plate is provided on the inner wall of the stirring tank and at the upper end, a bracket is provided on the upper end surface of the mounting plate, a first motor is provided on the upper end surface of the bracket, the output end of the first motor passes through the bracket and is provided with a first stirring shaft, a transmission pulley is provided at one end of the first stirring shaft, two groups of the transmission pulleys are provided and are symmetrically arranged up and down, a second stirring shaft is rotatably provided on the upper end surface of the mounting plate and on both sides, a driven pulley is provided at one end of the second stirring shaft, belts are provided on the transmission pulley and the driven pulley, the lower ends of the first stirring shaft and the second stirring shaft pass through the mounting plate and are provided with stirring blades, a shell is fixedly provided on the outer wall of the stirring tank and at the lower end, a heating chamber is opened inside the shell, a heating wire is provided inside the heating chamber, and a plurality of heating wires are provided and arranged in a circular shape.

[0004] The above patent adopts the setting of adding multiple raw materials at the same time and then stirring and mixing. The multiple raw materials are separated from each other before stirring, and the stirring and mixing speed is slow. Therefore, a new device needs to be designed. Utility Model Content

[0005] The purpose of the utility model is to provide a raw material premixing device for 3D printing to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A raw material premixing device for 3D printing, comprising a stirring assembly for stirring and mixing powdered raw materials, a conveying assembly for spirally conveying raw materials installed on the stirring assembly, and a feeding assembly for continuous mixing and feeding of materials through multiple ports and performing wind impact initial mixing arranged on the conveying assembly;

[0008] The feeding assembly includes an air mixing box, a feed discharge pipe is arranged at the bottom of the air mixing box, a ventilation net is arranged on the feed discharge pipe, a plurality of spray pipes are evenly arranged around the circumference of the air mixing box, a material control valve is arranged on one side of the spray pipe, a spray pump is installed on the top of the spray pipe, and a storage hopper is arranged above the spray pump.

[0009] Furthermore: the stirring assembly includes a stirring drum, a stirring rod is rotatably installed in the stirring drum, a stirring motor is installed on the top of the stirring rod, a discharge pipe is arranged at the bottom of the stirring drum, and four legs are evenly arranged under the stirring drum.

[0010] Furthermore: the conveying assembly includes a support frame, a conveying pipe is installed on the top of the support frame, a spiral conveying blade is installed in the conveying pipe, a conveying motor is installed at one end of the spiral conveying blade, a feed pipe is arranged on the lower side of the conveying pipe, and a receiving pipe is arranged on the upper side of the conveying pipe away from the feed pipe.

[0011] Furthermore: the air mixing box is circular in shape and has a conical bottom, and four spray pipes are provided.

[0012] Furthermore: the bottom shape of the mixing drum is conical, and the mixing drum is made of 304 stainless steel.

[0013] Furthermore: the feed pipe is connected to the delivery pipe by welding.

[0014] Compared with the prior art, the beneficial effects are:

[0015] 1. Through the setting of multiple continuous mixing feed ports, multiple raw materials are preliminarily mixed during feeding, which improves the subsequent stirring and mixing speed;

[0016] 2. The setting of wind impact initial mixing improves the initial mixing effect during feeding;

[0017] 3. By controlling the setting of feeding speed, the initial mixing of raw materials in different proportions can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a raw material premixing device for 3D printing described in the utility model;

[0019] Figure 2 This is an axonometric diagram of a stirring assembly of a raw material premixing device for 3D printing described in the utility model;

[0020] Figure 3 It is an axonometric diagram of a conveying component of a raw material premixing device for 3D printing described in the utility model;

[0021] Figure 4 It is an axonometric view of a feed component of a raw material premixing device for 3D printing described in the utility model.

[0022] In the accompanying drawings, 101, mixing drum; 102, mixing rod; 103, mixing motor; 104, discharge pipe; 105, support leg; 201, support frame; 202, conveying pipe; 203, spiral conveying blade; 204, conveying motor; 205, feeding pipe; 206, receiving pipe; 301, air mixing box; 302, discharge pipe; 303, ventilation net; 304, spraying pipe; 305, material control valve; 306, spraying pump; 307, storage hopper. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 4 A raw material premixing device for 3D printing includes a stirring component for stirring and mixing powder raw materials, a conveying component for spirally conveying raw materials installed on the stirring component, and a feeding component arranged on the conveying component for continuous mixing of multiple ports and performing wind impact initial mixing.

[0025] In this embodiment: the stirring assembly includes a stirring drum 101, a stirring rod 102 is rotatably installed in the stirring drum 101, a stirring motor 103 is installed on the top of the stirring rod 102, a discharge pipe 104 is arranged at the bottom of the stirring drum 101, four legs 105 are evenly arranged below the stirring drum 101, the bottom of the stirring drum 101 is conical, and the stirring drum 101 is made of 304 stainless steel. After the raw materials enter the stirring drum 101 supported by the legs 105, the stirring motor 103 drives the stirring rod 102 to rotate to stir and mix the raw materials until they are evenly mixed, and then the raw materials are discharged through the discharge pipe 104 for use;

[0026] In this embodiment: the conveying assembly includes a support frame 201, a conveying pipe 202 is installed on the top of the support frame 201, a spiral conveying blade 203 is installed in the conveying pipe 202, a conveying motor 204 is installed at one end of the spiral conveying blade 203, a feeding pipe 205 is arranged on the lower side of the conveying pipe 202, a receiving pipe 206 is arranged on the upper side of the conveying pipe 202 away from the feeding pipe 205, the feeding pipe 205 is welded to the conveying pipe 202, after the raw material enters the receiving pipe 206, it will fall into the conveying pipe 202 supported by the support frame 201, at this time, the conveying motor 204 drives the spiral conveying blade 203 to rotate to convey the raw material to the feeding pipe 205, and the raw material falls into the mixing drum 101 through the feeding pipe 205;

[0027] In this embodiment: the feeding assembly includes an air mixing box 301, a feed pipe 302 is arranged at the bottom of the air mixing box 301, a ventilated net 303 is arranged on the feed pipe 302, four spraying pipes 304 are evenly arranged around the circumference of the air mixing box 301, a control valve 305 is arranged on one side of the spraying pipe 304, a spraying pump 306 is installed on the top of the spraying pipe 304, and a storage hopper 307 is arranged on the spraying pump 306. The air mixing box 301 is circular in shape and has a conical bottom shape. Different 3D printing powder raw materials are fed into the air mixing box 301. Pour them into different storage hoppers 307 respectively, and adjust the opening size of the control valve 305 according to the proportion of different raw materials to control the feeding speed. Then, four spray pumps 306 work at the same time to continuously spray the four raw materials in the storage hopper 307 into the air mixing box 301 from different directions through the spray pipe 304, so that the four raw materials impact and mix with each other in the air mixing box 301, and then the raw materials enter the receiving pipe 206 through the discharge pipe 302. In this process, the wind of the spray is discharged through the ventilation net 303.

[0028] Working principle: Different 3D printing powder raw materials are poured into different storage hoppers 307 respectively, and the opening size of the control valve 305 is adjusted according to the proportion of different raw materials to control the feeding speed. Then the four injection pumps 306 work simultaneously to continuously spray the four raw materials in the storage hopper 307 into the air mixing box 301 from different directions through the injection pipe 304, so that the four raw materials impact and mix with each other in the air mixing box 301, and then the raw materials enter the receiving pipe 206 through the discharge pipe 302. During the process, the wind of the spraying material is discharged through the ventilation net 303; after the raw material enters the receiving pipe 206, it will fall into the conveying pipe 202 supported by the support frame 201. At this time, the conveying motor 204 drives the spiral conveying blade 203 to rotate to convey the raw material to the feeding pipe 205, and the raw material falls into the mixing drum 101 supported by the support leg 105 through the feeding pipe 205. Then the stirring motor 103 drives the stirring rod 102 to rotate to stir and mix the raw material until it is evenly mixed, and then it is discharged through the discharge pipe 104 for use.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A raw material premixing device for 3D printing, comprising a stirring assembly for stirring and mixing powdered raw materials, wherein a conveying assembly for spirally conveying raw materials is installed on the stirring assembly, characterized in that: It also includes a feeding assembly disposed on the conveying assembly for continuous mixing and feeding of materials at multiple ports and performing preliminary mixing by wind impact; The feeding assembly comprises an air mixing box (301), a feeding pipe (302) is arranged at the bottom of the air mixing box (301), a ventilation net (303) is arranged on the feeding pipe (302), a plurality of spraying pipes (304) are evenly arranged on the circumference of the air mixing box (301), a material control valve (305) is arranged on one side of the spraying pipe (304), a spraying pump (306) is installed on the top of the spraying pipe (304), and a storage hopper (307) is arranged above the spraying pump (306).

2. A raw material premixing device for 3D printing according to claim 1, characterized in that: The stirring assembly comprises a stirring drum (101), a stirring rod (102) is rotatably mounted in the stirring drum (101), a stirring motor (103) is mounted on the top of the stirring rod (102), a discharge pipe (104) is arranged at the bottom of the stirring drum (101), and four supporting legs (105) are evenly arranged below the stirring drum (101).

3. A raw material premixing device for 3D printing according to claim 1, characterized in that: The conveying assembly comprises a support frame (201), a conveying pipe (202) is installed on the top of the support frame (201), a spiral conveying blade (203) is installed in the conveying pipe (202), a conveying motor (204) is installed at one end of the spiral conveying blade (203), a feeding pipe (205) is arranged on one side below the conveying pipe (202), and a receiving pipe (206) is arranged on one side above the conveying pipe (202) away from the feeding pipe (205).

4. A raw material premixing device for 3D printing according to claim 1, characterized in that: The air mixing box (301) is circular in shape and has a conical bottom, and four injection pipes (304) are provided.

5. A raw material premixing device for 3D printing according to claim 2, characterized in that: The bottom of the mixing drum (101) is conical, and the mixing drum (101) is made of 304 stainless steel.

6. A raw material premixing device for 3D printing according to claim 3, characterized in that: The feed pipe (205) is connected to the delivery pipe (202) by welding.

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