A raw material drying device for injection molding of eyeglass frames

Abstract

This invention relates to the field of injection molding raw material drying technology, specifically a raw material drying device for eyeglass frame injection molding production. The device includes an air inlet pipe inserted into the material hopper with an installation port at one end. A hollow tube is inserted into the installation port, and multiple stirring blades are fixedly installed around the hollow tube. This invention utilizes an internal air passage design between the hollow tube and the stirring blades in the raw material drying device. Hot air is directly blown into the raw material from the air outlet grooves on the surface of the stirring blades. Combined with the tumbling action of the inclined stirring blades, the raw material is heated simultaneously from the inside and outside, resulting in more uniform and thorough drying and significantly improved thermal efficiency. By using a bevel gear transmission system, the rotational power of the motor is simultaneously transmitted to the stirring blades and the auger discharge mechanism. During the drying process, raw material is sampled, allowing users to analyze the sampled material and more accurately estimate the drying time for undried raw materials.

Description

Technical Field

[0001] This invention relates to the field of injection molding raw material drying technology, specifically to a raw material drying device for injection molding of eyeglass frames. Background Technology

[0002] Plastic raw materials (especially engineering plastics) are hygroscopic and will absorb moisture from the air during storage and transportation. If they are not dried sufficiently, the moisture will quickly vaporize during high-temperature injection molding, leading to defects such as bubbles, silver streaks, flow marks, embrittlement, and dimensional instability in the product, which will seriously reduce the mechanical properties and appearance quality of the product. Therefore, drying is necessary before injection molding.

[0003] Currently, factories typically use hot air drying hoppers to dry raw materials before injecting them into injection molding machines for processing. However, existing hot air drying hoppers only allow heat to enter from the outside or bottom of the hopper, resulting in low heat transfer efficiency, uneven heating of the raw materials, and the presence of drying dead zones, thus limiting the drying effect. Furthermore, when drying new materials, existing hot air drying hoppers require operators to continuously sample and gradually calculate the specific drying time and temperature. Therefore, a raw material drying device for eyeglass frame injection molding production is needed to address these issues. Summary of the Invention

[0004] To address the issue of blind spots in the drying process of raw materials for eyeglass frame injection molding using hot air drying drums, which makes sampling inconvenient for users, this invention provides a raw material drying device for eyeglass frame injection molding to solve the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A raw material drying device for injection molding of eyeglass frames includes a material barrel, a feeding chute fixedly connected to one side of the material barrel, one end of the feeding chute bent downwards and connected to the material barrel, a heating control box fixedly installed on one side of the material barrel, a fan fixedly installed above the heating control box, an air inlet pipe connected below the heating control box, one end of the air inlet pipe bent horizontally and inserted into the inside of the material barrel, a discharge port provided at the bottom of the material barrel, an installation port opened above the end of the air inlet pipe inserted into the material barrel, a hollow tube inserted into the installation port, multiple stirring blades fixedly installed around the periphery of the hollow tube, a motor fixedly installed above the material barrel, a connecting shaft fixedly connected below the motor, and the connecting shaft inserted into the inside of the material barrel and fixedly connected to the hollow tube; The hollow tube has multiple air outlets on both sides and multiple air inlets at the lower end of the hollow tube that extends into the installation port. The stirring blade is fixedly connected to the air inlet pipe on one side. The air inlet pipe is fixedly connected to the air outlet. Multiple sliding grooves are opened above the stirring blade. Air outlet grooves are opened inside the sliding grooves. The stirring blade is tilted as a whole. The installation port is located inside the material barrel and is fixedly connected to a baffle at one end. A discharge pipe is fixedly connected to one end of the baffle. A feed inlet is opened above one end of the discharge pipe. The other end of the discharge pipe passes through the material barrel and is located outside the material barrel. A rotating shaft is rotatably connected inside the discharge pipe. One end of the rotating shaft passes through the baffle and is located inside the air inlet pipe. A bevel gear three is fixedly connected to the rotating shaft inside the air inlet pipe. A rotating rod is fixedly connected to the lower end of the hollow tube inside the air inlet pipe. A bevel gear one is fixedly connected to the outside of the rotating rod. The bevel gear one is located on one side of the bevel gear three and meshes with the bevel gear three. An auger blade is installed inside the discharge pipe outside the rotating shaft. A discharge pipe is fixedly connected to the lower end of the other end of the discharge pipe. A storage box is installed below the discharge pipe.

[0006] Preferably, an installation plate is fixedly connected below the discharge port, and installation holes are provided at the four corners of the installation plate. A gate is slidably connected below the installation plate, and the lower end face of the gate is flush with the lower end face of the installation plate.

[0007] Preferably, the feeding pipe is fixedly connected to connecting columns on both sides, and a hanging groove is horizontally opened above the storage box, which can be locked onto the connecting columns.

[0008] Preferably, the other end of the discharge pipe is provided with an outlet, which is connected to the inside of the discharge pipe.

[0009] Preferably, the air inlet pipe is fixedly connected to an outer end of one end of the material barrel with a mounting cover. Inside the mounting cover, a special-shaped bevel gear is fixedly connected to the outer side of the hollow pipe. Inside the mounting cover, a second bevel gear is rotatably connected to the outer side of the air inlet pipe. The second bevel gear is located on one side of the special-shaped bevel gear and can mesh with the special-shaped bevel gear. A rotating cover is fixedly connected to the other side of the second bevel gear. The rotating cover passes through the mounting cover and is located above the discharge pipe. An opening is opened on the rotating cover, and the opening can coincide with the feed inlet.

[0010] Preferably, the outer side of the irregular bevel gear is provided with a partially protruding tooth groove, which engages with the second bevel gear after rotation.

[0011] Preferably, the outer diameter of the air inlet pipe is the same as the outer diameter of the discharge pipe. The air inlet pipe passes through the bevel gear II and the inside of the rotating cover, and the discharge pipe passes through the inside of the rotating cover. Lubrication is provided between the bevel gear II, the rotating cover, the air inlet pipe, and the discharge pipe.

[0012] Preferably, a support base is provided between the lower end of the rotating rod and the interior of one end of the air inlet pipe, and the rotating rod is rotatably connected to the support base.

[0013] Preferably, the heating control box is equipped with a heating component and a temperature control component.

[0014] Preferably, the material hopper is equipped with display windows on both sides, and the display windows are made of transparent material.

[0015] Compared with the prior art, the present invention, by setting an internal air channel design through a hollow tube and a stirring blade in the raw material drying device for injection molding of eyeglass frames, allows hot air to be blown directly into the raw material from the air outlet groove on the surface of the stirring blade. Combined with the tumbling action of the inclined stirring blade, the raw material is heated inside and out at the same time, resulting in more uniform and thorough drying and significantly improved thermal efficiency.

[0016] This invention utilizes a bevel gear transmission system to simultaneously transmit the rotational power of the motor to the stirring blades and the auger discharge mechanism. During the drying process, raw materials are sent out for sampling, allowing users to analyze the sampled materials and more accurately estimate the drying time for undried materials. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the discharge port structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the material barrel of the present invention; Figure 4 This is a schematic diagram of the connection structure between the stirring blade and the hollow tube of the present invention; Figure 5 This is a schematic diagram of the stirring blade structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the mounting cover of the present invention; Figure 7 This is a schematic diagram of the internal structure of the air inlet pipe of the present invention; Figure 8 This is a schematic diagram of the internal structure of the discharge pipe of the present invention; Figure 9 This is a schematic diagram of the storage box structure of the present invention; In the diagram: 1. Material bucket; 2. Feed chute; 3. Heating control box; 4. Air inlet pipe; 401. Mounting port; 402. Baffle; 5. Fan; 6. Discharge port; 601. Mounting plate; 602. Gate; 7. Motor; 8. Connecting shaft; 9. Hollow tube; 901. Air outlet; 902. Air inlet; 903. Rotating rod; 904. Bevel gear one; 10. Stirring blade; 1001. Air inlet pipe; 100 2. Air outlet groove; 1003. Slide groove; 11. Mounting cover; 1101. Irregular bevel gear; 1102. Rotating cover; 1103. Bevel gear two; 1104. Opening; 12. Discharge pipe; 1201. Feed inlet; 1202. Rotating shaft; 1203. Bevel gear three; 1204. Screwdriver blade; 1205. Discharge pipe; 1206. Storage box; 1207. Connecting column; 1208. Hanging groove. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] Example: Please refer to Figure 1-9 The device shown is a raw material drying apparatus for injection molding of eyeglass frames. It includes a material tank 1, with a feeding trough 2 fixedly connected to one side of the tank 1. One end of the feeding trough 2 is bent downwards and connected to the material tank 1. A heating control box 3 is fixedly installed on one side of the tank 1. A fan 5 is fixedly installed above the heating control box 3. An air inlet pipe 4 is connected below the heating control box 3, with one end bent and inserted horizontally into the material tank 1. A discharge port 6 is located at the bottom of the tank 1. An installation port 401 is opened above the end of the air inlet pipe 4 inserted into the material tank 1. A hollow tube 9 is inserted into the installation port 401, and multiple stirring blades 10 are fixedly installed around the hollow tube 9. A motor 7 is fixedly installed above the tank 1, and a connecting shaft 8 is fixedly connected below the motor 7. The connecting shaft 8 is inserted into the material tank 1 and fixedly connected to the hollow tube 9. The material tank 1, as the main container of the apparatus, is made of stainless steel, possessing good corrosion resistance and heat insulation properties. The material tank 1 has a cylindrical structure, closed at the top and tapered at the bottom, facilitating the downward convergence of raw materials.

[0020] The hollow tube 9 has multiple air outlets 901 on both sides, and multiple air inlets 902 extending into the mounting port 401 at its lower end. One side of the stirring blade 10 is fixedly connected to the air inlet pipe 1001, which is also fixedly connected to the air outlet 901. Multiple grooves 1003 are formed above the stirring blade 10, and air outlet grooves 1002 are formed inside the grooves 1003. The stirring blade 10 is tilted as a whole. The hollow tube 9 is a cylindrical structure made of stainless steel or aluminum alloy, and its length is adapted to the internal height of the material container 1. The upper end of the hollow tube 9 is welded to the connecting shaft 8 or connected via a flange, and the lower end is inserted into the mounting port 401 and extends into the horizontal section of the air inlet pipe 4. A rotary sealing device (such as a mechanical seal or packing seal) is provided between the hollow tube 9 and the mounting port 401 to ensure that the hollow tube 9 can rotate freely while preventing hot air leakage from the gap. The number of stirring blades 10 is 4-12, evenly distributed along the circumference of the hollow tube 9. Each stirring blade 10 includes a blade body and an internal air passage. The blade body is a plate-like structure, formed by stamping stainless steel sheet. The blade body is inclined as a whole, with an angle of 15°-45° with the horizontal plane, preferably 30°. The inclined design allows the stirring blade 10 to both agitate the raw materials and generate an upward axial thrust when rotating, promoting the vertical circulation and mixing of the raw materials.

[0021] An air inlet pipe 1001 is welded to one edge of the stirring blade 10. The air inlet pipe 1001 is a short tube, one end of which communicates with the cavity inside the stirring blade 10, and the other end is fixedly connected to the air outlet 901 on the hollow tube 9 through a flange or thread. Multiple grooves 1003 are formed on the upper surface (working surface) of the stirring blade 10. The grooves 1003 are long strip-shaped grooves that extend along the length of the blade. An air outlet groove 1002 is formed at the bottom of each groove 1003. The air outlet groove 1002 is slit-shaped, with a width of 1-3 mm and a length of 20-50 mm, and communicates with the cavity inside the stirring blade 10.

[0022] During operation, hot air enters the hollow tube 9 through the air inlet 902 from the air inlet pipe 4, flows upward, and then splits into the air inlet pipe 1001 through the air outlets 901. It then enters the internal cavity of the stirring blade 10 and is finally ejected from the air outlet 1002. Because the stirring blade 10 rotates and agitates the raw material, the hot air is directly blown into the gaps between the raw material particles, achieving penetrating drying. The design of the chute 1003 guides the direction of the hot air flow and prevents raw material particles from clogging the air outlet 1002.

[0023] The mounting port 401 is located inside the material barrel 1, with a baffle 402 fixedly connected to one end. A discharge pipe 12 is fixedly connected to one end of the baffle 402. An inlet 1201 is located above one end of the discharge pipe 12. The other end of the discharge pipe 12 passes through the material barrel 1 and is located outside the material barrel 1. A rotating shaft 1202 is rotatably connected inside the discharge pipe 12. One end of the rotating shaft 1202 passes through the baffle 402 and is located inside the air inlet pipe 4. A bevel gear is fixedly connected to the rotating shaft 1202 inside the air inlet pipe 4. 1203, the lower end of the hollow tube 9 is fixedly connected to the rotating rod 903 inside the air inlet tube 4. The outer side of the rotating rod 903 is fixedly connected to the bevel gear 904. The bevel gear 904 is located on one side of the bevel gear 1203 and meshes with the bevel gear 1203. The inside of the discharge tube 12 is equipped with the auger blade 1204 outside the rotating shaft 1202. The other end of the discharge tube 12 is fixedly connected to the discharge tube 1205. The storage box 1206 is installed below the discharge tube 1205.

[0024] In this embodiment, please refer to Figure 2 Specifically: A mounting plate 601 is fixedly connected below the discharge port 6. Mounting holes are provided at the four corners of the mounting plate 601. A gate plate 602 is slidably connected below the mounting plate 601. The lower end face of the gate plate 602 is flush with the lower end face of the mounting plate 601.

[0025] In this embodiment, please refer to Figure 8-9 Specifically: connecting posts 1207 are fixedly connected to both sides of the feeding pipe 1205, and a hanging groove 1208 is horizontally opened above the storage box 1206, which can be locked above the connecting posts 1207.

[0026] In this embodiment, please refer to Figure 8-9Specifically: An outlet is located at the lower end of the other end of the discharge pipe 12, and the outlet is connected to the interior of the discharge pipe 1205. A hanging groove 1208 is horizontally opened at the top of the storage box 1206. The hanging groove 1208 is a long, narrow groove or hook-shaped structure, slightly wider than the diameter of the connecting column 1207, allowing it to be quickly inserted into the connecting column 1207 for suspension and fixation, facilitating removal for analysis of the internal raw materials.

[0027] In this embodiment, please refer to Figure 6-9 Specifically: an installation cover 11 is fixedly connected to the outer side of one end of the air inlet pipe 4 inside the material barrel 1. A special-shaped bevel gear 1101 is fixedly connected to the outer side of the hollow pipe 9 inside the installation cover 11. A second bevel gear 1103 is rotatably connected to the outer side of the air inlet pipe 4 inside the installation cover 11. The second bevel gear 1103 is located on one side of the special-shaped bevel gear 1101 and can mesh with the special-shaped bevel gear 1101. A rotating cover 1102 is fixedly connected to the other side of the second bevel gear 1103. The rotating cover 1102 passes through the installation cover 11 and is located above the discharge pipe 12. An opening 1104 is opened on the rotating cover 1102, and the opening 1104 can coincide with the feed port 1201.

[0028] In this embodiment, please refer to Figure 6-9 Specifically, the outer side of the irregular bevel gear 1101 has a partially protruding tooth groove, which engages with the second bevel gear 1103 after rotation. During operation, the hollow tube 9 rotates continuously, driving the irregular bevel gear 1101 to rotate. When the protruding tooth groove rotates to contact the second bevel gear 1103, the two mesh, driving the second bevel gear 1103 and the rotating cover 1102 to rotate at a certain angle; when the protruding tooth groove rotates away, there is no meshing, and the rotating cover 1102 stops rotating. Therefore, the rotating cover 1102 achieves intermittent stepping rotation.

[0029] During the stationary period of the rotating cover 1102, the opening 1104 is offset from the feed inlet 1201, and the rotating cover 1102 closes the feed inlet 1201, preventing raw materials from entering the discharge pipe 12. At this time, the auger blade 1204 idles or pushes residual raw materials. When the rotating cover 1102 rotates stepwise until the opening 1104 coincides with the feed inlet 1201, the raw materials fall into the discharge pipe 12 under gravity and are pushed out by the auger blade 1204. By adjusting the central angle ratio of the protruding tooth groove of the irregular bevel gear 1101 and the speed of the motor 7, the amount and interval of each discharge can be precisely controlled, realizing quantitative batch discharge.

[0030] In this embodiment, please refer to Figure 7Specifically: the outer diameter of the air inlet pipe 4 is the same as the outer diameter of the discharge pipe 12. The air inlet pipe 4 passes through the interior of the bevel gear 1103 and the rotating cover 1102, and the discharge pipe 12 passes through the interior of the rotating cover 1102. Lubrication is provided between the bevel gear 1103, the rotating cover 1102, the air inlet pipe 4, and the discharge pipe 12. The fitting gaps between the bevel gear 1103, the rotating cover 1102, the air inlet pipe 4, and the discharge pipe 12 are filled with high-temperature resistant grease to reduce friction and wear.

[0031] In this embodiment, specifically: a support seat is provided between the lower end of the rotating rod 903 and the interior of one end of the air inlet pipe 4, and the rotating rod 903 is rotatably connected to the support seat. The support seat has a built-in bearing (such as a deep groove ball bearing or a sliding bearing) to support the rotating rod 903 and ensure its stable rotation.

[0032] In this embodiment, specifically: the heating control box 3 is equipped with a heating component and a temperature control component. The heating control box 3 is fixedly installed on the outside of one side of the material hopper 1, and contains the heating component and temperature control component. The heating component uses an electric heating wire or a PTC ceramic heater, which can be adjusted according to the characteristics of the raw materials and the drying volume. The temperature control component includes a temperature sensor, a controller, and a display screen. The temperature sensor detects the inlet air temperature, the controller automatically adjusts the heating power according to the set temperature, and the display screen shows the current temperature in real time. The heating control box 3 is also equipped with an overheat protection device, which automatically cuts off the power supply when the temperature exceeds the safety threshold.

[0033] In this embodiment, please refer to Figure 1 Specifically: Display windows made of transparent material are installed on both sides of the material hopper 1. The display windows on both sides of the material hopper 1 are made of transparent material (such as tempered glass) to facilitate operators to observe the movement and general state of the raw materials inside.

[0034] In this solution, the raw material drying device for injection molding of eyeglass frames operates as follows: Raw material enters the material bin 1 from the feed chute 2. The blower 5 and heating control box 3 are started, and hot air enters through the air inlet 4, passes through the air inlet 902 at the lower end of the hollow tube 9, enters the interior of the hollow tube 9, then passes through the air outlet 901 and the air inlet 1001 to reach the stirring blade 10, and finally is blown out from the air outlet 1002. Simultaneously, the motor 7 is started, driving the connecting shaft 8 to rotate the hollow tube 9 and the stirring blade 10. The inclined stirring blade 10 agitates the raw material, allowing the hot air to evenly penetrate the raw material layer for drying.

[0035] When the hollow tube 9 rotates, it also drives the rotating rod 903 and the first bevel gear 904 to rotate. The first bevel gear 904 meshes with the third bevel gear 1203, driving the rotating shaft 1202 and the auger blade 1204 to rotate. At the same time, the irregular bevel gear 1101 rotates with the hollow tube 9, and its protruding tooth groove periodically contacts the second bevel gear 1103, driving the rotating cover 1102 to rotate intermittently. When the opening 1104 of the rotating cover 1102 coincides with the feed inlet 1201, the dried raw material enters the discharge pipe 12, is conveyed by the auger blade 1204 to the discharge pipe 1205, and falls into the storage box 1206. The user can analyze the raw material in the storage box 1206.

[0036] The heating control box 3 and motor 7 used in this invention are both existing known electrical devices and can be purchased and used directly on the market. Their structure, circuit and control principle are all existing known technologies. Therefore, the structure, circuit and control principle of the heating control box 3 and motor 7 will not be described in detail here.

[0037] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A raw material drying device for injection molding of eyeglass frames, comprising a material barrel (1), a feeding trough (2) fixedly connected to one side of the material barrel (1), one end of the feeding trough (2) bent downwards and connected to the material barrel (1), a heating control box (3) fixedly installed on one side of the material barrel (1), a fan (5) fixedly installed above the heating control box (3), an air inlet pipe (4) connected below the heating control box (3), one end of the air inlet pipe (4) bent horizontally and inserted into the material barrel (1), and a discharge port (6) provided below the material barrel (1), characterized in that: The air inlet pipe (4) is inserted into the material barrel (1) and has an installation port (401) at one end. A hollow pipe (9) is inserted into the installation port (401). Multiple stirring blades (10) are fixedly installed around the hollow pipe (9). A motor (7) is fixedly installed above the material barrel (1). A connecting shaft (8) is fixedly connected below the motor (7). The connecting shaft (8) is inserted into the material barrel (1) and fixedly connected to the hollow pipe (9). The hollow tube (9) has multiple air outlets (901) on both sides, and the lower end of the hollow tube (9) extends into the installation port (401) and has multiple air inlets (902). The stirring blade (10) is fixedly connected to the air inlet pipe (1001) on one side. The air inlet pipe (1001) has an air outlet (901) fixedly connected to it. The stirring blade (10) has multiple sliding grooves (1003) on the top. The sliding grooves (1003) have air outlet grooves (1002) inside. The stirring blade (10) is tilted as a whole. The mounting port (401) is located inside the material barrel (1) and one end is fixedly connected to a baffle (402). One end of the baffle (402) is fixedly connected to a discharge pipe (12). An inlet (1201) is opened above one end of the discharge pipe (12). The other end of the discharge pipe (12) passes through the material barrel (1) and is located outside the material barrel (1). A rotating shaft (1202) is rotatably connected inside the discharge pipe (12). One end of the rotating shaft (1202) passes through the baffle (402) and is located inside the air inlet pipe (4). A bevel gear is fixedly connected inside the air inlet pipe (4) to the rotating shaft (1202). (1203), the lower end of the hollow tube (9) is fixedly connected to the air inlet tube (4) with a rotating rod (903), and a bevel gear (904) is fixedly connected to the outside of the rotating rod (903). The bevel gear (904) is located on one side of the bevel gear (1203) and meshes with the bevel gear (1203). The discharge pipe (12) is installed with an auger blade (1204) inside the rotating shaft (1202) and a discharge pipe (1205) is fixedly connected to the lower end of the other end of the discharge pipe (12). A storage box (1206) is installed below the discharge pipe (1205).

2. The raw material drying device for injection molding production of eyeglass frames according to claim 1, characterized in that: A mounting plate (601) is fixedly connected below the discharge port (6). Mounting holes are provided at the four corners of the mounting plate (601). A gate plate (602) is slidably connected below the mounting plate (601). The lower end face of the gate plate (602) is flush with the lower end face of the mounting plate (601).

3. The raw material drying device for injection molding production of eyeglass frames according to claim 1, characterized in that: The feeding pipe (1205) is fixedly connected to the connecting posts (1207) on both sides, and the storage box (1206) is horizontally provided with a hanging groove (1208) above it. The hanging groove (1208) can be locked above the connecting posts (1207).

4. The raw material drying device for injection molding production of eyeglass frames according to claim 1, characterized in that: The other end of the discharge pipe (12) is provided with an outlet, which is connected to the inside of the discharge pipe (1205).

5. The raw material drying device for injection molding production of eyeglass frames according to claim 1, characterized in that: The air inlet pipe (4) is located inside the material barrel (1) and is fixedly connected to the outer side of one end of the air inlet pipe (4). Inside the air inlet pipe (4), a special-shaped bevel gear (1101) is fixedly connected to the outer side of the hollow pipe (9). Inside the air inlet pipe (4), a second bevel gear (1103) is rotatably connected to the air inlet pipe (4). The second bevel gear (1103) is located on one side of the special-shaped bevel gear (1101) and can mesh with the special-shaped bevel gear (1101). On the other side of the second bevel gear (1103), a rotating cover (1102) is fixedly connected. The rotating cover (1102) passes through the air inlet pipe (11) and is located above the discharge pipe (12). An opening (1104) is opened on the rotating cover (1102) and can coincide with the feed inlet (1201).

6. The raw material drying device for injection molding production of eyeglass frames according to claim 5, characterized in that: The outer side of the irregular bevel gear (1101) is provided with a protruding tooth groove, which engages with the second bevel gear (1103) after rotation.

7. The raw material drying device for injection molding production of eyeglass frames according to claim 5, characterized in that: The outer diameter of the air inlet pipe (4) is the same as that of the discharge pipe (12). The air inlet pipe (4) passes through the interior of the bevel gear (1103) and the rotating cover (1102). The discharge pipe (12) passes through the interior of the rotating cover (1102). Lubrication is provided between the bevel gear (1103), the rotating cover (1102), the air inlet pipe (4), and the discharge pipe (12).

8. The raw material drying device for injection molding production of eyeglass frames according to claim 1, characterized in that: A support seat is provided between the lower end of the rotating rod (903) and the interior of one end of the air inlet pipe (4), and the rotating rod (903) is rotatably connected to the support seat.

9. A raw material drying device for injection molding production of eyeglass frames according to claim 1, characterized in that: The heating control box (3) is equipped with heating components and temperature control components.

10. A raw material drying device for injection molding production of eyeglass frames according to claim 1, characterized in that: The material hopper (1) is equipped with display windows on both sides, and the display windows are made of transparent material.

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