Preheater for plastic meal box production

Abstract

The utility model relates to the technical field of plastic meal box production, and discloses a preheater for plastic meal box production, which comprises a case, a case door, a plurality of partition shells, a preheating drying mechanism, a heat recovery mechanism and a high-temperature steam discharge pipe, the front side of the case is rotatably connected with the case door through a hinge, the partition shells are fixed in the case, air holes are arranged on the partition shells, and the preheating drying mechanism is fixed on the case. The preheating drying mechanism extends into the multiple separation shells, the top of the machine box is connected with a high-temperature steam discharging pipe, and a heat recovery mechanism connected with the high-temperature steam discharging pipe is installed at the bottom end in the machine box. Plastic particles are preheated more evenly, drying efficiency is higher, heat in high-temperature steam generated during preheating is recycled conveniently, and the energy utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of plastic lunch box production technology, and in particular to a preheating machine for plastic lunch box production. Background Technology

[0002] Plastic food containers are produced using plastic granules as raw material and injection molding machines. Before adding the plastic granules into the injection molding machine, they need to be preheated to increase their temperature and remove any moisture.

[0003] Existing preheating machines heat large quantities of plastic granules together, which can lead to uneven heating and reduced drying efficiency. Furthermore, the high-temperature steam generated during preheating is directly discharged, wasting heat. Therefore, there is an urgent need to develop a preheating machine for plastic food container production that provides more uniform preheating of plastic granules, higher drying efficiency, and convenient heat recovery from the high-temperature steam generated during preheating, thereby improving energy utilization and overcoming the shortcomings of current applications to meet current needs. Utility Model Content

[0004] The purpose of this invention is to provide a preheating machine for the production of plastic lunch boxes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A preheating machine for producing plastic lunch boxes includes a chassis, a door, partition shells, a preheating and drying mechanism, a heat recovery mechanism, and a high-temperature steam exhaust pipe. The door is hinged to the front of the chassis. Multiple partition shells are fixed inside the chassis, each with ventilation holes. The preheating and drying mechanism extends into the partition shells and includes an air pump, a spiral tube, a heating rod, a conduit, a distributor pipe, an air outlet, and a rotary drive mechanism. The air pump's outlet is connected to the spiral tube, and the heating rod is installed inside the spiral tube. The conduit is rotatably connected to the partition shells, and the left end of the spiral tube is inserted into and rotatably connected to the conduit. The duct is equipped with multiple branch pipes, each with multiple air outlets. A rotary drive mechanism for rotating the duct is installed at the bottom of the chassis. A high-temperature steam exhaust pipe is connected to the top of the chassis. A heat recovery mechanism connected to the high-temperature steam exhaust pipe is installed at the bottom of the chassis. The heat recovery mechanism includes a water tank, heat-conducting fins, a heat exchange tube, and an exhaust pipe. The water tank is filled with water and contains a heat exchange tube. The left end of the heat exchange tube is connected to the lower end of the high-temperature steam exhaust pipe, and the right end of the heat exchange tube is connected to an exhaust pipe extending to the outside of the chassis. Multiple heat-conducting fins are fixed on the upper side of the water tank.

[0007] Preferably, the door has two card sleeves fixed on it, and the chassis has a detachable pin that can be inserted into the card sleeves.

[0008] Preferably, each of the shunt tubes is located inside a partition shell.

[0009] Preferably, the rotary drive mechanism includes a drive motor, a first gear, and a second gear. The drive motor is fixed to the bottom of the housing. The first gear is fixed on the output shaft of the drive motor. A second gear meshing with the first gear is provided on one side of the first gear. The second gear is fixed to the lower end of the guide tube.

[0010] Preferably, both the spiral tube and the heat-conducting fins are made of copper.

[0011] The beneficial effects of this utility model are as follows: In the production of plastic lunch boxes, the preheating machine separates the plastic granules onto multiple partition shells to reduce granule accumulation and facilitate contact between hot air and the granules, resulting in more uniform heating. Then, an air pump is activated to blow air into the spiral tube, which is heated by an electric heating rod. The heated airflow passes through a duct, a distribution pipe, and an air outlet before being discharged. The hot air then passes through vents to contact the plastic granules, thus preheating and drying them. Simultaneously, a drive motor rotates the first and second gears, which in turn rotate the duct, distribution pipe, and air outlet, ensuring more uniform heating of the plastic granules. The high-temperature steam generated during heating is discharged from the high-temperature steam exhaust pipe into the heat exchange pipe, where it heats the water in the water storage tank. The heat is then dissipated into the machine casing through heat-conducting fins, improving heat utilization. Finally, the gas is discharged from the exhaust pipe. In summary, this utility model provides more uniform preheating of plastic granules, higher drying efficiency, and convenient heat recovery and utilization from the high-temperature steam generated during preheating, improving energy utilization. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a schematic diagram of the open state of this utility model.

[0014] Figure 3 A partial structural cross-section of this utility model. Figure 1 .

[0015] Figure 4 A partial structural cross-section of this utility model. Figure 2 .

[0016] Legend:

[0017] 1. Chassis; 2. Door; 201. Slip sleeve; 3. Pin; 4. Separator shell; 401. Vent hole; 5. Preheating and drying mechanism; 501. Air pump; 502. Spiral tube; 503. Heating rod; 504. Conduit; 505. Diverter pipe; 506. Air outlet; 507. Rotary drive mechanism; 5071. Drive motor; 5072. First gear; 5073. Second gear; 6. Heat recovery mechanism; 601. Water tank; 602. Heat-conducting fins; 603. Heat exchange tube; 604. Air outlet pipe; 7. High-temperature steam exhaust pipe. Detailed Implementation

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

[0019] Specific implementation examples are given below.

[0020] See Figures 1-4In this embodiment of the present invention, a preheating machine for producing plastic lunch boxes includes a casing 1, a door 2, partition shells 4, a preheating and drying mechanism 5, a heat recovery mechanism 6, and a high-temperature steam exhaust pipe 7. The front side of the casing 1 is hinged to the door 2, which has two clips 201 fixed on it. A pin 3 inserted into the clips 201 is detachably installed on the casing 1. Multiple partition shells 4 are fixed inside the casing 1, and each partition shell 4 has a vent hole 401. The partition shells 4 are used to support the plastic granules that need to be preheated. The preheating and drying mechanism 5 extends into the multiple partition shells 4 and includes... The system comprises an air pump 501, a spiral tube 502, a heating rod 503, a conduit 504, a branch pipe 505, an air outlet 506, and a rotary drive mechanism 507. The air pump 501 is located on the ground, and its outlet is connected to the spiral tube 502. The heating rod 503 is installed inside the spiral tube 502. The conduit 504 is rotatably connected to multiple partition shells 4. The left end of the spiral tube 502 is inserted into and rotatably connected to the conduit 504. Multiple branch pipes 505 are installed on the conduit 504, each branch pipe 505 being located inside a partition shell 4. Multiple air outlets are installed on the branch pipes 505. 506. A rotary drive mechanism 507 for rotating the conduit 504 is installed at the bottom of the casing 1. The rotary drive mechanism 507 includes a drive motor 5071, a first gear 5072, and a second gear 5073. The drive motor 5071 is fixed to the bottom of the casing 1. The first gear 5072 is fixed on the output shaft of the drive motor 5071. A second gear 5073 meshing with the first gear 5072 is provided on one side of the first gear 5072. The second gear 5073 is fixed to the lower end of the conduit 504. A high-temperature steam exhaust pipe 7 is connected to the top of the casing 1. A device is installed at the bottom of the interior of the casing 1 that... The heat recovery mechanism 6 is connected to the high-temperature steam exhaust pipe 7. The heat recovery mechanism 6 includes: a water storage tank 601, heat-conducting fins 602, a heat exchange pipe 603, and an exhaust pipe 604. The water storage tank 601 is filled with water. The heat exchange pipe 603 is installed inside the water storage tank 601. The left end of the heat exchange pipe 603 is connected to the lower end of the high-temperature steam exhaust pipe 7. The right end of the heat exchange pipe 603 is equipped with an exhaust pipe 604 extending to the outside of the casing 1. Multiple heat-conducting fins 602 are fixed on the upper side of the water storage tank 601. Both the spiral tube 502 and the heat-conducting fins 602 are made of copper, which gives them good thermal conductivity.

[0021] Working Principle: This preheating machine for plastic lunchbox production uses a preheating system. Plastic granules are placed separately on multiple separator shells 4 to reduce granule accumulation and facilitate contact between hot air and the granules, resulting in more even heating. Then, the air pump 501 blows air into the spiral tube 502, which is heated by the heating rod 503. The heated airflow is then discharged through the conduit 504, the distributor 505, and the air outlet 506. The hot air then passes through the vent 401 to contact the plastic granules, thus preheating and drying them. Simultaneously, through… The drive motor 5071 drives the first gear 5072 and the second gear 5073 to rotate. The second gear 5073 drives the duct 504, the diverter pipe 505, and the air outlet 506 to rotate, so that the plastic particles are heated more evenly. The high-temperature steam generated by heating is discharged from the high-temperature steam exhaust pipe 7 into the heat exchange pipe 603. The heat exchange pipe 603 heats the water in the water storage tank 601. The heat is then dissipated into the casing 1 through the heat-conducting fins 602 to improve the heat utilization rate. Finally, the gas is discharged from the exhaust pipe 604.

[0022] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A preheating machine for producing plastic lunch boxes, characterized in that, The system includes a chassis (1), a door (2), partition shells (4), a preheating and drying mechanism (5), a heat recovery mechanism (6), and a high-temperature steam exhaust pipe (7). The front side of the chassis (1) is hinged to the door (2). Multiple partition shells (4) are fixed inside the chassis (1). Each partition shell (4) has a vent hole (401). The preheating and drying mechanism (5) extends into the multiple partition shells (4). The preheating and drying mechanism (5) includes an air pump (501). The system comprises a spiral tube (502), a heating rod (503), a conduit (504), a branch pipe (505), an air outlet (506), and a rotary drive mechanism (507). The air outlet of the air pump (501) is connected to the spiral tube (502). The heating rod (503) is installed inside the spiral tube (502). The conduit (504) is rotatably connected to multiple partition shells (4). The left end of the spiral tube (502) is inserted into the conduit (504) and rotatably connected thereto. The conduit (505) is... 4) The casing (1) is provided with multiple diversion pipes (505), and multiple air outlets (506) are installed on the diversion pipes (505). The bottom of the casing (1) is provided with a rotary drive mechanism (507) for driving the duct (504) to rotate. The top of the casing (1) is connected to a high-temperature steam exhaust pipe (7). The bottom of the interior of the casing (1) is provided with a heat recovery mechanism (6) connected to the high-temperature steam exhaust pipe (7). The heat recovery mechanism (6) includes: a water storage tank (601). The water storage shell (601) is filled with water and a heat exchange tube (603) is installed inside the water storage shell (601). The left end of the heat exchange tube (603) is connected to the lower end of the high-temperature steam discharge pipe (7). The right end of the heat exchange tube (603) is equipped with a gas outlet pipe (604) extending to the outside of the casing (1). Multiple heat-conducting fins (602) are fixed on the upper side of the water storage shell (601).

2. The preheating machine for producing plastic lunch boxes according to claim 1, characterized in that, Two clips (201) are fixed on the door (2), and a pin (3) that can be inserted into the clip (201) is detachably installed on the chassis (1).

3. The preheating machine for producing plastic lunch boxes according to claim 1, characterized in that, Each of the said shunt tubes (505) is located inside a partition shell (4).

4. The preheating machine for producing plastic lunch boxes according to claim 1, characterized in that, The rotary drive mechanism (507) includes: a drive motor (5071), a first gear (5072) and a second gear (5073). The drive motor (5071) is fixed to the bottom of the housing (1). The first gear (5072) is fixed on the output shaft of the drive motor (5071). A second gear (5073) is provided on one side of the first gear (5072) to mesh with it. The second gear (5073) is fixed to the lower end of the guide tube (504).

5. The preheating machine for producing plastic lunch boxes according to claim 1, characterized in that, Both the spiral tube (502) and the heat-conducting fins (602) are made of copper.

Images