A drying hopper for injection molding raw materials

Abstract

The utility model discloses an injection molding raw material's drying hopper is provided with the installation box, and the installation box is fixedly connected with drying hopper and fan in, drying hopper side portion and top portion are equipped with air inlet and feed port respectively, and drying hopper top is fixedly connected with suction hopper, and the pipe is connected between suction hopper and fan, and the discharge port of suction hopper is communicated with the feed port of drying hopper, and the feed pipe is fixedly connected with the feed port of drying hopper inside, and the air duct is fixedly connected with the air inlet of drying hopper, and the drying hopper outer wall is connected with pressure reducing device, and the drying hopper bottom opening is provided with the unloading valve, and the drying hopper top is fixedly connected with material level sensor. The utility model through fan inhales raw material into suction hopper, and raw material falls into drying hopper from suction hopper again, and then hot air is passed to drying hopper again, makes the moisture on raw material evaporate and discharges from pressure reducing device, and compared with the manual holding handheld fan to the raw material of storehouse and carries out drying, is more convenient and saves the labor, and raw material does not fly everywhere simultaneously, and influences the environment.

Description

Technical Field

[0001] This utility model relates to the field of injection molding manufacturing technology, and in particular to a drying hopper for injection molding raw materials. Background Technology

[0002] When injection molding plastic parts, a material feeder is needed to feed the injection molding machine. The material feeder mainly consists of a hopper and a blower. The hopper is connected to the injection molding machine and is connected to the blower and the raw material in the hopper via conduits. The blower sucks the raw material into the conduit between the hopper and the hopper. The raw material passes through the hopper, is blocked by the filter in the hopper, and falls into the hopper under gravity. When the raw material in the hopper reaches a certain amount, the blower stops sucking, and the raw material in the hopper falls from the bottom into the injection molding machine. Similarly, when the raw material in the hopper decreases to a certain amount, the hopper stops discharging, and the blower adds material to the hopper. When a certain amount is added, the material is fed into the injection molding machine again. This process is repeated to achieve quantitative feeding of the injection molding machine.

[0003] During long-term storage, raw materials can become damp. When these damp materials enter the injection molding machine, the moisture evaporates after melting, causing bubbles to form during the cooling process of the molded parts, affecting the quality of the plastic parts. At the same time, under high-temperature conditions, moisture can trigger a decomposition reaction, producing harmful substances. This not only affects the quality of the final product but may also harm the production environment and the health of the operators. Typically, the moisture is removed by manually blowing air through the raw materials in the hopper or bin with a hand fan, which is laborious and causes the raw materials to scatter everywhere, impacting the environment. Utility Model Content

[0004] The purpose of this invention is to provide a drying hopper for injection molding raw materials, which has the advantage of facilitating the drying of injection molding raw materials.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A drying hopper for injection molding raw materials is provided with an installation box. The drying hopper and a fan are fixedly connected inside the installation box. The drying hopper has an air inlet and a feed inlet on its side and top, respectively. A suction hopper is fixedly connected to the top of the drying hopper. A conduit connects the suction hopper and the fan, and a filter device is connected to the conduit between the two. The discharge port at the bottom of the suction hopper communicates with the feed inlet at the top of the drying hopper. A guide pipe is fixedly connected inside the drying hopper at the feed inlet, and the bottom end of the guide pipe extends to an opening near the bottom of the drying hopper. An air inlet is fixedly connected to the air inlet on the outer wall of the drying hopper, and an air guide pipe is fixedly connected to the air inlet on the inner wall of the drying hopper, with the bottom opening of the air guide pipe extending to the bottom opening of the drying hopper. A pressure reducing device is connected to the outer wall of the drying hopper. A discharge valve is provided at the bottom opening of the drying hopper, and a material level sensor is fixedly connected to the top of the drying hopper.

[0007] Using the above technical solution, the mounting box is fixed on the injection molding machine, and the discharge valve of the drying hopper is connected to the feed inlet of the injection molding machine. The conduit of the feed inlet on the suction hopper is led into the hopper. The air inlet of the drying hopper is connected to the hot air blower through the air inlet pipe. The blower is activated to extract air from the suction hopper and drying hopper, creating negative pressure inside the suction hopper and drying hopper to draw the raw material into the suction hopper. The raw material then enters the drying hopper from the discharge port at the bottom of the suction hopper through the guide pipe. When the material level sensor detects that the raw material in the drying hopper has reached a certain amount, the blower stops extracting air, and the hot air blower is activated to introduce hot air from the air inlet pipe between the blower and the drying hopper into the guide pipe in the drying hopper, and then into the drying hopper from the guide pipe. Under the temperature and flow of the hot air, after a period of evaporation and... During air drying, the moisture in the raw materials turns into water vapor, increasing the pressure inside the drying hopper. The pressure reducing device is activated, and the water vapor is discharged from the drying hopper. When the drying time reaches the preset value of the discharge valve, the discharge valve opens, and the raw materials inside the drying hopper fall into the injection molding machine. This prevents the moisture on the raw materials from evaporating at the high temperature of the injection molding machine, which could cause bubbles to form in the injection molded parts during cooling, affecting the quality of the plastic parts. It also avoids the decomposition reaction of moisture under high temperature conditions, which could produce harmful substances, affecting the quality of the final product and causing harm to the production environment and the health of the operators. Compared to manually drying the raw materials in the hopper with a handheld fan, the drying effect of this embodiment is better, more convenient and labor-saving, and it does not cause the raw materials to fly around and affect the environment.

[0008] Preferably, the filtration device includes a dust collection chamber and a filter element. The dust collection chamber is fixedly connected to the side wall of the mounting chamber. The filter element is located inside the dust collection chamber. The suction hopper and the fan are respectively connected to the dust collection chamber by conduits. The opening of the conduit between the fan and the dust collection chamber extends into the dust collection chamber and is connected to the filter element inside.

[0009] Using the above technical solution, the blower draws the raw material into the suction hopper, and at the same time, other impurities are also drawn into the duct. The impurities are drawn into the dust collection chamber by the blower and blocked by the filter element in the dust collection chamber, preventing the impurities from being drawn into the blower and thus damaging the blower.

[0010] Preferably, the pressure reducing device is a pressure relief valve.

[0011] Using the above technical solution, the moisture on the raw material evaporates, the air pressure inside the drying hopper increases, pushing the pressure relief valve to open, and the water vapor is discharged from the pressure relief valve; at the same time, when the temperature of the hot air inside the drying hopper decreases, the hot air fan inputs heated gas into the drying hopper again, and the original gas in the drying hopper is discharged from the pressure relief valve.

[0012] Preferably, the side wall of the drying hopper is provided with an inspection port, and an inspection door is hinged to the side wall of the drying hopper at the inspection port. A fixing member connects the inspection door to the side wall of the drying hopper.

[0013] Using the above technical solution, the inside of the dryer can be inspected by opening the inspection door. After the inspection is completed, the inspection door is closed to block the inspection opening, and then the inspection door is fixed by fasteners.

[0014] Preferably, a sealing ring is affixed to the outer wall of the drying hopper at the inspection port, and the inspection port is located inside the sealing ring.

[0015] When the above technical solution is adopted, the inspection door is fixed and blocked by the closing fastener, and the inspection door comes into contact with the sealing ring, which reduces the gap between the inspection door and the drying hopper, increases the sealing performance of the drying hopper, prevents the hot air inside from flowing out, and thus reduces the drying effect.

[0016] Preferably, the fasteners are hooks and latches, which are fixedly connected to the inspection door and the drying hopper, respectively.

[0017] By adopting the above technical solution, the inspection door is closed and the inspection opening is blocked. Then, the fastener is used to hook the hanging column, thereby fixing the inspection door and keeping the drying hopper closed.

[0018] Preferably, the drying hopper is made of stainless steel.

[0019] By adopting the above technical solution, the stainless steel drying bucket has good heat preservation properties, thereby increasing the drying effect of the drying bucket. Attached Figure Description

[0020] Figure 1 This is an overall schematic diagram of the embodiment;

[0021] Figure 2 This is an overall schematic diagram from another perspective of the embodiment;

[0022] Figure 3 This is a side view of an embodiment;

[0023] Figure 4 This is a front view of an embodiment;

[0024] Figure 5 This is a top view of an embodiment;

[0025] Figure 6 This is a schematic diagram of the overall drying hopper;

[0026] Figure 7 This is a structural diagram of the inspection port;

[0027] Figure 8 This is a schematic diagram of the internal structure of the drying hopper.

[0028] Reference numerals: 1. Mounting box; 2. Drying hopper; 3. Fan; 4. Suction hopper; 5. Feed pipe; 6. Air pipe; 7. Discharge valve; 8. Material level sensor; 9. Filter device; 10. Pressure relief valve; 11. Inspection port; 12. Inspection door; 13. Sealing ring; 14. Hanging column; 15. Fastener. Detailed Implementation

[0029] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model should be considered within the protection scope of this utility model. It should also be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

[0030] See Figures 1 to 8 A drying hopper for injection molding raw materials is provided, comprising an installation box 1. The installation box 1 has a fan chamber 3 and a discharge chamber. A fan 3 is fixedly connected to the fan chamber 3, and a drying hopper 2 is fixedly connected to the discharge chamber. The drying hopper 2 is made of stainless steel to improve its heat preservation effect. An air inlet and a feed inlet are respectively opened on the side and top of the drying hopper 2. A suction hopper 4 is fixedly connected to the top of the drying hopper 2, and the discharge port at the bottom of the suction hopper 4 communicates with the feed inlet at the top of the drying hopper 2. A feed inlet and an air outlet are opened on the side wall of the suction hopper 4. A conduit is connected to the feed inlet, and a filter screen is installed between the conduit and the feed inlet. A conduit is also connected between the air outlet of the suction hopper 4 and the fan 3, and a filter device 9 is connected to the conduit between the two. The filtration device 9 includes a dust collection chamber and a filter element. The dust collection chamber is fixedly connected to the side wall of the mounting chamber. The filter element is located inside the dust collection chamber. The suction hopper 4 and the fan 3 are respectively connected to the dust collection chamber by ducts. The opening of the duct between the fan 3 and the dust collection chamber extends into the dust collection chamber and is connected to the filter element inside.

[0031] Inside the drying hopper 2, a guide pipe 5 is fixedly connected at its feed inlet. The bottom end of the guide pipe 5 extends to the opening near the bottom of the drying hopper 2. An air inlet pipe is fixedly connected at the air inlet on the outer wall of the drying hopper 2, and an air guide pipe 6 is fixedly connected at the air inlet on the inner wall of the drying hopper 2. The bottom opening of the air guide pipe 6 extends to the opening below the drying hopper 2. A pressure relief valve 10 is connected to the outer wall of the drying hopper 2. A discharge valve 7 is provided at the bottom opening of the drying hopper 2, and a material level sensor 8 is fixedly connected to the top of the drying hopper 2. The drying hopper 2 has an inspection port 11 on its side wall. A sealing ring 13 is attached to the outer wall of the drying hopper 2 at the inspection port 11 to reduce the gap between the inspection door 12 and the drying hopper 2, increase the sealing of the drying hopper 2, and prevent the internal hot air from flowing out, thereby reducing the drying effect. The inspection port 11 is located inside the sealing ring 13, and the inspection door 12 is hinged to the side wall of the drying hopper 2 at the inspection port 11. A hanging post 14 and a buckle 15 are fixedly connected to the inspection door 12 and the drying hopper 2, respectively.

[0032] Working Principle: Mounting box 1 is fixed to the injection molding machine, and the discharge valve 7 of drying hopper 2 is connected to the injection molding machine's feed inlet. The conduit at the feed inlet of suction hopper 4 is inserted into the hopper, and the air inlet of drying hopper 2 is connected to hot air blower 3 via an air inlet pipe. Blower 3 starts, drawing air out of suction hopper 4 and drying hopper 2, creating negative pressure inside the suction hopper and drying hopper 2 to draw raw material into suction hopper 4. The filter element in the collection chamber blocks impurities from the suction conduit of blower 3, preventing impurities from entering blower 3 and affecting its operation. The raw material in suction hopper 4 then enters drying hopper 2 through the discharge port at the bottom of suction hopper 4 and the guide pipe 5. Once the material level sensor 8 detects that the amount of raw material in drying hopper 2 has reached a certain level, blower 3 stops drawing air.

[0033] The hot air blower 3 starts, introducing hot air from the air inlet pipe between itself and the drying hopper 2 into the air guide pipe 6 inside the drying hopper 2. The hot air then enters the drying hopper 2 through the air guide pipe 6. Under the temperature and flow of the hot air, after a period of evaporation and drying, the moisture in the raw material turns into water vapor, increasing the internal pressure of the drying hopper 2. This pushes the pressure relief valve 10 to open, allowing the water vapor in the drying hopper 2 to be discharged. When the drying time reaches the preset value of the unloading valve 7, the unloading valve 7 opens, and the raw material inside the drying hopper 2 falls into the injection molding machine. This prevents the moisture on the raw material from evaporating at the high temperature of the injection molding machine, which could cause bubbles to form in the injection molded parts during cooling, affecting the quality of the plastic parts. It also avoids the decomposition reaction of moisture under high temperature conditions, producing harmful substances that could affect the quality of the final product and harm the production environment and the health of the operators. Compared to manually drying the raw material in the hopper using a handheld blower 3, this embodiment offers better drying results, is more convenient and labor-saving, and prevents the raw material from scattering and affecting the environment.

[0034] When the temperature of the hot air inside the drying hopper 2 decreases, the hot air blower 3 introduces heated gas back into the drying hopper 2, and the original gas in the drying hopper 2 is discharged through the pressure relief valve 10. The interior of the drying hopper can be inspected by opening the inspection door 12. After the inspection is completed, the inspection door 12 is closed to block the inspection port 11, and the hook 15 is used to hook the hanging post 14 on the inspection door 12 to fix the inspection door 12 in place, thus keeping the drying hopper 2 closed.

Claims

1. A drying hopper for injection molding raw materials, equipped with a mounting box (1), characterized in that, The drying hopper (2) and the fan (3) are fixedly connected inside the installation box (1). The drying hopper (2) has an air inlet and a feed inlet on its side and top, respectively. The top of the drying hopper (2) is fixedly connected to a suction hopper (4). A conduit is connected between the suction hopper (4) and the fan (3), and a filter device (9) is connected to the conduit between the two. The discharge port at the bottom of the suction hopper (4) is connected to the feed inlet at the top of the drying hopper (2). A guide pipe is fixedly connected inside the drying hopper (2) at the feed inlet. (5) The bottom end of the guide pipe (5) extends to the opening near the bottom of the drying hopper (2). An air inlet pipe is fixedly connected to the air inlet on the outer wall of the drying hopper (2), and an air guide pipe (6) is fixedly connected to the air inlet on the inner wall of the drying hopper (2). The bottom opening of the air guide pipe (6) extends to the opening below the drying hopper (2). A pressure reducing device is connected to the outer wall of the drying hopper (2). A discharge valve (7) is provided at the bottom opening of the drying hopper (2), and a material level sensor (8) is fixedly connected to the top of the drying hopper (2).

2. The drying hopper for injection molding raw materials according to claim 1, characterized in that, The filtration device (9) includes a dust collection chamber and a filter element. The dust collection chamber is fixedly connected to the side wall of the mounting chamber. The filter element is located inside the dust collection chamber. The suction hopper (4) and the fan (3) are respectively connected to the dust collection chamber by conduits. The port of the conduit between the fan (3) and the dust collection chamber extends into the dust collection chamber and is connected to the filter element inside.

3. The drying hopper for injection molding raw materials according to claim 1, characterized in that, The pressure reducing device is a pressure relief valve (10).

4. The drying hopper for injection molding raw materials according to claim 1, characterized in that, The drying hopper (2) has an inspection port (11) on its side wall. An inspection door (12) is hinged to the side wall of the drying hopper (2) at the inspection port (11). A fixing member is connected between the inspection door (12) and the side wall of the drying hopper (2).

5. The drying hopper for injection molding raw materials according to claim 4, characterized in that, A sealing ring (13) is affixed to the outer wall of the drying hopper (2) at the inspection port (11), and the inspection port (11) is located inside the sealing ring (13).

6. The drying hopper for injection molding raw materials according to claim 4, characterized in that, The fasteners are a hook and a post (14), which are fixedly connected to the inspection door (12) and the drying hopper (2), respectively.

7. The drying hopper for injection molding raw materials according to claim 1, characterized in that, The drying hopper (2) is made of stainless steel.

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