An automatic feeding device with drying function

Abstract

The present application relates to the field of injection molding machines, and in particular to an automatic feeding device with a drying function, comprising a material barrel and a feeding structure inside the material barrel, the feeding structure comprising a vertically arranged spiral rod, a vertical tube sleeved on the outside of the spiral rod, and a motor for driving the spiral rod to rotate, a connecting feeding hole is provided at the circumferential surface position of the bottom of the vertical tube, a discharge hole for introducing raw materials into a hopper is provided at the upper end of the vertical tube, an air distribution cavity is provided inside the vertical tube, the wall between the air distribution cavity and the inner surface of the vertical tube is a mesh wall with mesh holes, and a hot air structure for blowing hot air toward the air distribution cavity is provided on the outer surface of the vertical tube, so as to achieve the effect of drying the raw materials during the feeding process.

Description

Technical Field

[0001] The present application relates to the field of injection molding machines, and in particular to an automatic feeding device with a drying function. Background Art

[0002] Injection molding machine, also known as injection molding machine or injection machine, is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal, and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it eject and fill the mold cavity. When feeding the injection molding machine, due to the high feed hole, an automatic feeder is usually required to feed the material.

[0003] At present, the spiral feeder is the most ideal feeder among all feeders. It can not only feed granules and powders, but also is more suitable for feeding crushed materials and recycled materials from crushers. It can also feed mixed materials such as granules, powders and crushed materials. The plasticizing device of the screw injection molding machine is mainly composed of a feeding device, a barrel, a screw, a glue assembly and a nozzle. The power transmission device includes an injection cylinder, an injection seat moving cylinder and a screw drive device.

[0004] The above-mentioned prior art solutions have the following defects: the existing feeder does not have the effect of drying the raw materials. If the humidity in the raw materials is too high, water vapor will be generated when the products are manufactured, resulting in gaps in the products and reducing product quality. Summary of the invention

[0005] In order to dry raw materials during the automatic feeding process, the present application provides an automatic feeding device with a drying function.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] An automatic feeding device with a drying function comprises a material barrel and a feeding structure inside the material barrel, the feeding structure comprises a vertically arranged spiral rod, a vertical pipe sleeved on the outside of the spiral rod and a motor driving the spiral rod to rotate, a connecting feeding hole is provided at the circumferential surface position of the bottom of the vertical pipe, a discharge hole for introducing raw materials into a hopper is provided at the upper end of the vertical pipe, an air distribution cavity is provided inside the vertical pipe, the wall between the air distribution cavity and the inner surface of the vertical pipe is a mesh wall with mesh holes, and a hot air structure for blowing hot air into the air distribution cavity is provided on the outer surface of the vertical pipe.

[0008] By adopting the above scheme, raw materials are filled into the barrel, and the raw materials enter the vertical tube from the feed hole. The motor drives the screw rod to rotate, and the rotation of the screw rod drives the raw materials to move from bottom to top. At the same time, the hot air structure blows hot air into the vertical tube to dry the raw materials. When the raw materials reach the top of the vertical tube, they enter the hopper of the injection molding machine from the discharge hole, thereby achieving the purpose of drying the raw materials during the automatic loading process.

[0009] Optionally, the material barrel and the vertical pipe are cylindrical, the vertical pipe is located at the center of the material barrel, and two feed holes are provided, and the two feed holes are respectively located on opposite sides of the vertical pipe.

[0010] By adopting the above technical solution, the vertical pipe is located at the center of the barrel. After the raw materials around the vertical pipe enter the inside of the vertical pipe, a slope will be formed around the vertical pipe. The raw materials slightly farther away from the vertical pipe will slide along the slope to the vicinity of the vertical pipe, so that the raw materials in the barrel can enter the vertical pipe to the maximum extent.

[0011] Optionally, a funnel-shaped oblique ring plate is provided on the lower surface of the barrel, and the center of the oblique ring plate is connected to the lower side of the feed hole.

[0012] By adopting the above technical solution, the raw materials placed on the inclined ring plate will tend to slide into the vertical pipe along the inclined ring plate, so that the raw materials in the barrel can enter the vertical pipe more smoothly.

[0013] Optionally, a material guide nozzle is provided at the material discharge hole of the vertical tube, and the material guide nozzle is arranged obliquely, the material guide nozzle is connected to the material discharge hole of the vertical tube at the upper end, and the material guide nozzle is located above the hopper at the lower end.

[0014] By adopting the above technical solution, when the raw materials reach the storage port, the raw materials slide into the hopper along the material guide nozzle, so that the raw materials can enter the hopper more accurately. When there is a distance between the automatic feeding device and the injection molding machine, the length of the material guide nozzle can be adjusted so that the raw materials can also enter the hopper smoothly.

[0015] Optionally, a feed sensor and a stop sensor are provided on the inner wall of the hopper. The feed sensor is located at the lower part of the hopper, and the stop sensor is located at the upper part of the hopper. The feed sensor and the stop sensor are connected to the motor and the hot air structure through wires.

[0016] By adopting the above technical solution, when the raw material in the hopper is insufficient, that is, the feed sensor cannot detect the raw material, the feed sensor transmits a start signal to the motor and the hot air structure, and the motor and the hot air structure operate to make the raw material in the barrel move upward along the spiral rod while being dried, and then enter the hopper. When the stop sensor detects the raw material, the stop sensor transmits a stop signal to the motor and the hot air structure, and the motor and the hot air structure stop, thereby detecting the raw material position in the hopper and automatically loading the hopper.

[0017] Optionally, a hollow frame is provided at the upper end of the vertical tube, the motor is arranged on the hollow frame, and the output shaft of the motor is fixedly connected to the spiral rod.

[0018] By adopting the above technical solution, when the screw rod rotates, the speed at which the screw rod transports the raw materials to the upper end of the vertical pipe is different from the efficiency of the raw materials being output at the discharge hole, which may cause accumulation of raw materials at the upper end of the vertical pipe. The accumulated raw materials are squeezed out from the gaps between the hollow frames and fall into the barrel, preventing the raw materials from accumulating in the vertical pipe and causing the automatic feeding device to fail to operate normally.

[0019] Optionally, the hot air structure includes a shell, a fan and an electric heater, the shell is connected to the air distribution cavity, the fan and the electric heater are arranged inside the shell, and the electric heater is arranged on the path of air blown out by the fan.

[0020] By adopting the above technical solution, the fan blows air into the air distribution chamber, and the electric heater heats the air blown out by the fan, so that the air blown into the air distribution chamber is hot air. The hot air passes through the mesh wall and contacts the raw materials on the spiral rod to dry the raw materials, thereby achieving drying of the raw materials during the loading process.

[0021] Optionally, a bearing is provided at the connection between the lower end of the spiral rod and the barrel, and the spiral rod is rotatably connected to the barrel via the bearing.

[0022] By adopting the above technical solution, the rotation of the screw rod is smoother and the friction between the screw rod and the barrel is reduced.

[0023] In summary, this application has the following technical effects:

[0024] 1. The feeding structure and hot air structure are set up to dry the raw materials during the feeding process;

[0025] 2. The inclined ring plate allows the raw materials in the barrel to enter the vertical pipe more smoothly;

[0026] 3. Automatic feeding of the hopper is achieved by setting up a feed sensor and a stop sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of this application;

[0028] Figure 2 It is a cutaway view intended by this application to emphasize the feed structure;

[0029] Figure 3 It is a cutaway view intended by this application to emphasize the hot air structure;

[0030] Figure 4 It is a cross-sectional view of the hopper of this application.

[0031] In the figure, 1. material barrel; 11. oblique ring plate; 2. feeding structure; 21. screw rod; 211. bearing; 22. vertical pipe; 221. feeding hole; 222. air distribution chamber; 223. mesh wall; 224. discharging hole; 225. material guide nozzle; 23. motor; 231. hollow frame; 3. hot air structure; 31. outer shell; 32. fan; 33. electric heater; 4. hopper; 41. feeding sensor; 42. material stop sensor. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings.

[0033] Reference Figure 1 An automatic feeding device with drying function comprises a material barrel 1, a feeding structure 2 and a hot air structure 3 arranged on the feeding structure 2. The material barrel 1 is arranged on the ground, the feeding structure 2 is vertically arranged inside the material barrel 1, and the hot air structure 3 is arranged on the outer wall of the feeding structure 2. When automatically feeding, the raw material is first put into the material barrel 1, and the feeding structure 2 moves the raw material from the material barrel 1 to the hopper 4 of the injection molding machine. When the raw material passes through the feeding structure 2, the hot air structure 3 blows hot air into the feeding structure 2 to dry the raw material inside the feeding structure 2, thereby realizing automatic feeding of the raw material of the injection molding machine and drying of the raw material.

[0034] refer to Figure 2 The barrel 1 is a cylindrical barrel body with a groove on the upper surface. The feeding structure 2 is arranged at the center of the barrel 1. A circular oblique ring plate 11 is fixedly arranged on the bottom surface of the barrel 1. The oblique ring plate 11 is funnel-shaped. The small mouth end of the oblique ring plate 11 is fixedly connected to the feeding structure 2 at the bottom of the barrel 1, and the large mouth end of the oblique ring plate 11 is fixedly connected to the side wall of the barrel 1, so that the surface of the oblique ring plate 11 is in a slope shape connected to the feeding structure 2 at the bottom, so that the raw material can enter the inside of the barrel 1 and slide along the oblique ring plate 11 to the feeding structure 2.

[0035] The feeding structure 2 includes a screw rod 21, a vertical pipe 22 and a motor 23 for driving the screw rod 21 to rotate. The screw rod 21 is arranged vertically, and a bearing 211 is arranged at the bottom end of the screw rod 21. The screw rod 21 is rotatably connected to the barrel 1 through the bearing 211. The vertical pipe 22 is sleeved on the outside of the screw rod 21 and the bottom of the vertical pipe 22 is fixedly connected to the bottom of the barrel 1. Two feeding holes 221 for raw materials to enter are provided on opposite sides of the circumferential surface of the bottom end of the vertical pipe 22. The vertical pipe 22 is provided with a discharge hole 224 at one side of the top. A material guide nozzle 225 is fixedly provided at the discharge hole 224 of the vertical pipe 22. One end of the material guide nozzle 225 is fixedly connected to the discharge hole 224 of the vertical pipe 22, and the other end of the material guide nozzle 225 is provided above the hopper 4 of the injection molding machine. The raw material is placed into the barrel 1. The raw material reaches the bottom of the vertical tube 22 along the inclined ring plate 11, enters the vertical tube 22 through the feed hole 221 and contacts the screw rod 21. The screw rod 21 rotates to transport the raw material from the bottom of the vertical tube 22 to the top of the vertical tube 22, then slides out of the vertical tube 22 at the discharge hole 224, and then reaches the top of the hopper 4 along the guide nozzle 225 and enters the hopper 4 to complete the loading.

[0036] Reference Figure 1 and Figure 2 A hollow frame 231 is fixedly arranged at the top of the vertical tube 22, and the motor 23 is fixedly arranged on the hollow frame 231. The output shaft of the motor 23 passes through the hollow frame 231 and is fixedly connected to the upper end of the spiral rod 21. The motor 23 drives the spiral rod 21 to rotate, and the raw materials may stick together to form lumps, which may be blocked when passing through the discharge hole 224, resulting in the accumulation of raw materials at the upper end of the vertical tube 22. Excessive accumulation may cause the motor 23 to get stuck and malfunction. The hollow frame 231 is arranged so that the accumulated raw materials pass through the gap between the hollow frames 231 and fall back into the inside of the barrel 1, thereby preventing excessive accumulation of raw materials in the vertical tube 22 and malfunction.

[0037] refer to Figure 2 and Figure 3An air distribution cavity 222 is provided inside the vertical pipe 22, and a mesh wall 223 of a mesh structure is provided between the air distribution cavity 222 and the spiral rod 21. The hot air structure 3 is connected to the air distribution cavity 222. The hot air structure 3 includes a shell 31, a fan 32 and an electric heater 33. The shell 31 is arranged on the outside of the vertical pipe 22 and the shell 31 is connected to the air distribution cavity 222. The fan 32 is arranged inside the shell 31. A hole for air circulation is provided on the side of the shell facing away from the air distribution cavity. The fan 32 will blow into the air distribution cavity 222. The electric heater 33 is arranged on the path of the wind blown out by the fan 32. When the automatic feeding device is in operation, the screw rod 21 rotates to drive the raw material to move upward, and the fan 32 blows air into the air distribution chamber 222. The electric heater 33 heats the air blown into the air distribution chamber 222 by the fan 32, so that there is a hot air flow in the air distribution chamber 222. The hot air flow is evenly distributed inside the air distribution chamber 222, and then the hot air flow passes through the mesh wall 223 to contact the raw material. The hot air flow accelerates the evaporation of water by accelerating the air flow rate on the surface of the raw material and increasing stability, thereby achieving the purpose of drying the raw material.

[0038] refer to Figure 3 and Figure 4 A feed sensor 41 and a stop sensor 42 are arranged on the inner wall of the hopper 4. The feed sensor 41 and the stop sensor 42 are connected to the input end of the controller. The motor 23, the fan 32 and the electric heater 33 are connected to the output end of the controller. The feed sensor 41 is fixedly arranged at the lower part of the hopper 4, and the stop sensor 42 is fixedly arranged at the upper part of the hopper 4. When the raw material in the hopper 4 is too little, and the feed sensor 41 senses that there is no raw material, the feed sensor 41 sends a start signal to the controller, and the controller controls the motor 23, the fan 32 and the electric heater 33 to start, and feeds the raw material into the hopper 4 until the raw material is detected by the stop sensor 42. The stop sensor 42 sends a stop signal to the controller, and the controller controls the motor 23, the fan 32 and the electric heater 33 to stop, and the automatic feeding device stops feeding the hopper 4.

[0039] The specific implementation principle of this embodiment is: raw materials are loaded into the material barrel 1. When the feed sensor 41 detects that the raw materials in the hopper 4 are too little, the feed sensor 41 sends a start signal to the motor 23, the fan 32 and the electric heater 33. The motor 23, the fan 32 and the electric heater 33 are started, and the motor 23 drives the screw rod 21 to rotate. The raw materials in the material barrel 1 enter the vertical pipe 22 through the feed hole 221. The screw rod 21 rotates to transport the raw materials from the bottom of the vertical pipe 22 to the top of the vertical pipe 22. At the same time, the fan 32 blows air into the air distribution cavity 222, and the electric heater 33 heats the air to form a hot air flow. The hot air flow is dispersed in the air distribution cavity 222 and then passes through the mesh wall 223 to dry the inside of the vertical pipe 22. After the raw material reaches the top of the vertical tube 22, it slides out of the vertical tube 22 from the discharge hole 224, and then the raw material enters the inside of the hopper 4 along the material guide nozzle 225 until the material stop sensor 42 detects the raw material, and the material stop sensor 42 transmits a stop signal to the motor 23, the fan 32 and the electric heater 33, and the motor 23, the fan 32 and the electric heater 33 stop moving. Compared with the existing automatic feeding device, the automatic feeding device with drying function dries the raw material by setting the hot air structure 3, thereby reducing the probability of bubbles in the products produced by the injection molding machine, thereby improving the product quality.

[0040] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An automatic feeding device with drying function, characterized in that: The invention comprises a material barrel (1) and a feeding structure (2) inside the material barrel (1), wherein the feeding structure (2) comprises a vertically arranged screw rod (21), a vertical pipe (22) sleeved on the outside of the screw rod (21), and a motor (23) for driving the screw rod (21) to rotate, a communicating feeding hole (221) is provided at a circumferential surface position at the bottom of the vertical pipe (22), a discharge hole (224) for introducing raw materials into a hopper (4) is provided at the upper end of the vertical pipe (22), an air distribution cavity (222) is provided inside the vertical pipe (22), a mesh wall (223) with mesh holes is provided between the air distribution cavity (222) and the inner surface of the vertical pipe (22), and a hot air structure (3) for blowing hot air toward the air distribution cavity (222) is provided on the outer surface of the vertical pipe (22).

2. The automatic feeding device with drying function according to claim 1, characterized in that: The vertical pipe (22) is located at the center of the barrel (1), and two feeding holes (221) are provided. The two feeding holes (221) are respectively located at two opposite sides of the vertical pipe (22).

3. The automatic feeding device with drying function according to claim 2, characterized in that: A funnel-shaped oblique ring plate (11) is provided on the lower surface of the material barrel (1), and the center of the oblique ring plate (11) is connected to the lower side of the feed hole (221).

4. The automatic feeding device with drying function according to claim 1, characterized in that: A material guide nozzle (225) is arranged at the material discharge hole (224) of the vertical pipe (22). The material guide nozzle (225) is arranged obliquely. The material guide nozzle (225) is connected to the material discharge hole (224) of the vertical pipe (22) at the upper end, and is located above the hopper (4) at the lower end.

5. The automatic feeding device with drying function according to claim 1, characterized in that: A feed sensor (41) and a stop sensor (42) are arranged on the inner wall of the hopper (4); the feed sensor (41) is located at a lower part of the hopper (4), and the stop sensor (42) is located at an upper part of the hopper (4); the feed sensor (41) and the stop sensor (42) are connected to an output end of a controller via electric wires, and the output end of the controller is connected to a motor (23) and a hot air structure (3).

6. The automatic feeding device with drying function according to claim 1, characterized in that: A hollow frame (231) is arranged at the upper end of the vertical tube (22), the motor (23) is arranged on the hollow frame (231), and the output shaft of the motor (23) is fixedly connected to the spiral rod (21).

7. The automatic feeding device with drying function according to claim 1, characterized in that: The hot air structure (3) comprises a shell (31), a fan (32) and an electric heater (33); the shell (31) is connected to the air distribution cavity (222); the fan (32) and the electric heater (33) are arranged inside the shell (31); and the electric heater (33) is arranged on the path of air blown out by the fan (32).

8. The automatic feeding device with drying function according to claim 1, characterized in that: A bearing (211) is provided at the connection between the lower end of the spiral rod (21) and the material barrel (1), and the spiral rod (21) is rotatably connected to the material barrel (1) via the bearing (211).

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