A deburring device for plastic meal box processing

Abstract

The utility model discloses a deburring device for plastic meal box processing, including conveyer belt, the outside of conveyer belt is sequentially provided with refrigeration mechanism and shot blasting mechanism, the refrigeration bin is fixed in the conveyer belt outer frame, and the liquid nitrogen tank is located the refrigeration bin rear and is connected to the refrigeration bin inside through the conveying pipeline, and the electric control valve is installed on the conveying pipeline, and the inner wall fixed cooling box of refrigeration bin is equipped with the screen plate in the lower end of cooling box, the shot blasting bin is fixed in the conveyer belt outer frame of refrigeration bin right side, and the drive motor is installed on the upper end of shot blasting bin and is connected centrifugal fan, and the deburring device for plastic meal box processing is additionally provided with refrigeration mechanism and shot blasting mechanism, and the precision temperature control and energy consumption optimization of low temperature embrittlement are realized to the collaborative cooling design of refrigeration mechanism through metal cooling box and screen plate, and the high coverage impact of spiral conveying structure and pneumatic shot blasting structure ensures burr removal efficiency and pellet circulation economy, and the both cooperation significantly improves the yield rate and production efficiency of plastic meal box deburring process.

Description

Technical Field

[0001] This utility model relates to the field of plastic lunch box processing technology, specifically a deburring device for processing plastic lunch boxes. Background Technology

[0002] Plastic food containers are disposable or reusable food containers made from synthetic resins such as polypropylene and polystyrene through processes such as injection molding and vacuum forming. They are lightweight, drop-resistant, low-cost, and easy to shape, and are widely used in food delivery, food packaging, and home storage of leftovers. Their designs typically include sealing lids, layered structures, or compartmentalized functions to meet the needs of leak prevention, heat preservation, and categorized storage. Some products can be microwaved or refrigerated / frozen. However, due to the characteristics of the materials, long-term use at high temperatures may release harmful substances, and non-degradable plastic materials can easily cause environmental pollution. In recent years, they have been gradually replaced by biodegradable bio-based materials and environmentally friendly paper food containers, becoming a typical consumer product in the struggle between modern fast-paced life and environmental issues.

[0003] Existing plastic lunch boxes often develop burrs during injection molding and thermoforming processes due to mold wear, uneven temperature control, or improper demolding. These burrs not only affect the product's appearance and reduce its sealing performance, but may also cause cuts to users' hands or mouths due to sharp edges, and even contaminate food with tiny debris, posing a safety hazard. Traditional manual deburring methods mainly rely on workers manually cutting and polishing the burrs one by one with knives, sandpaper, or files, which is inefficient, costly, and results in poor consistency. In addition, manual operation is prone to secondary damage due to fatigue or mistakes, and plastic dust poses a threat to workers' respiratory health. Based on this, this utility model designs a deburring device for plastic lunch box processing to solve the above problems. Utility Model Content

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

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A deburring device for processing plastic lunch boxes includes a conveyor belt, with a refrigeration mechanism and a shot blasting mechanism sequentially arranged on the outer side of the conveyor belt. The refrigeration mechanism includes a liquid nitrogen tank, a conveying pipe, a refrigeration chamber, an electrically controlled valve, a cooling box, and a mesh plate. The refrigeration chamber is fixed to the outer frame of the conveyor belt. The liquid nitrogen tank is located behind the refrigeration chamber and connected to the interior of the refrigeration chamber via the conveying pipe. An electrically controlled valve is installed on the conveying pipe. The cooling box is fixed to the inner wall of the refrigeration chamber, and a mesh plate is installed at the lower end of the cooling box. The shot blasting mechanism includes a shot blasting chamber, a drive motor, a centrifugal fan, a shot conveying pipe, a branch pipe, a first nozzle, a second nozzle, a storage hopper, a feed pipe, a conveying pipe, a discharge pipe, a spiral conveyor rod, a stepper motor, a support column, a pipe support, and a recovery plate. The shot blasting chamber is fixed to the outer frame of the conveyor belt on the right side of the refrigeration chamber. The drive motor is installed at the upper end of the shot blasting chamber and connected to the centrifugal fan. The outlet of the centrifugal fan is connected to the shot conveying pipe, which extends into the shot blasting chamber and is connected to the first nozzle and the second nozzle via a branch pipe.

[0007] Optionally, in the refrigeration mechanism, the cooling box is a metal box filled with phase change material, which evenly diffuses the cold energy into the refrigeration chamber through the strip-shaped gaps of the mesh plate.

[0008] Optionally, in the shot peening mechanism, the storage hopper is located below the conveyor belt and connected to the conveying pipe through the feeding pipe. The conveying pipe is equipped with a spiral conveying rod, and the stepper motor drives the spiral conveying rod through a reducer.

[0009] Optionally, the discharge pipe connects the conveying pipe and the shot conveying pipe, the support column fixes the stepper motor and the pipe support, and the recovery plate is placed obliquely below the shot peening chamber and guides the material storage hopper.

[0010] Optionally, the first and second nozzles are perpendicular to the upper surface of the conveyor belt, and the pitch of the spiral conveyor bar gradually decreases from the feed pipe to the discharge pipe, forming a progressive compression conveying structure.

[0011] Optionally, the recycling plate is installed at an angle to the right side of the conveyor belt, with its end inserted into the interior of the storage hopper.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, a refrigeration mechanism is provided. The refrigeration mechanism achieves precise control of the low-temperature embrittlement process by combining a liquid nitrogen tank with the dynamic flow regulation of an electronically controlled valve. Liquid nitrogen is directly injected into the refrigeration chamber through a delivery pipe. The cold energy is evenly diffused through the metal cooling box and the strip-shaped gaps (1~2mm wide) of the mesh plate, ensuring that the cold energy is quickly transferred to the surface of the lunch box. At the same time, the strip-shaped gap design of the mesh plate avoids the local concentration of cold airflow, so that the surface temperature of the lunch box drops evenly to below -30℃ within a few seconds, achieving low-temperature embrittlement of burrs while avoiding the substrate from cracking due to excessive cooling.

[0014] 2. In this utility model, a shot peening mechanism is provided. The shot peening mechanism is driven by a stepper motor to stably transport the shot to the discharge pipe. Combined with the high-pressure airflow of the centrifugal fan, the shot is diverted through the shot conveying pipe to the vertically downward first nozzle and second nozzle. The two nozzles simultaneously cover the surface of the lunch box, and the impact range is more comprehensive, thoroughly removing brittle burrs. At the same time, the recovery plate is installed and inserted into the storage hopper, and the shot is automatically slid down and recovered by gravity. The support column and pipe support ensure the operational stability of the conveying pipe, so as to ensure the stability of shot conveying. Attached Figure Description

[0015] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model from a frontal view.

[0017] Figure 3 This is a three-dimensional top view of the structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the three-dimensional rear view structure of this utility model;

[0019] Figure 5 This is a top view of the structure of this utility model;

[0020] Figure 6 This is a three-dimensional sectional view of the structure of this utility model. Figure 1 ;

[0021] Figure 7 This is a three-dimensional sectional view of the structure of this utility model. Figure 2 ;

[0022] Figure 8 This is a three-dimensional sectional view of the structure of this utility model. Figure 3 ;

[0023] Figure 9 This is a three-dimensional sectional view of the structure of this utility model. Figure 4 .

[0024] In the diagram: 1. Conveyor belt; 2. Refrigeration mechanism; 201. Liquid nitrogen tank; 202. Conveying pipeline; 203. Refrigeration chamber; 204. Electrically controlled valve; 205. Cooling box; 206. Mesh plate; 3. Shot peening mechanism; 301. Shot peening chamber; 302. Drive motor; 303. Centrifugal fan; 304. Shot conveying pipeline; 305. Branch pipe; 306. First nozzle; 307. Second nozzle; 308. Storage hopper; 309. Feeding pipeline; 310. Conveying pipeline; 311. Discharge pipeline; 312. Screw conveyor; 313. Stepper motor; 314. Support column; 315. Pipe support; 316. Recovery plate. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, 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 mechanical connection or an electrical 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 based on the specific circumstances.

[0027] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-9 In this embodiment of the invention, the deburring device for processing plastic lunch boxes achieves continuous processing via a conveyor belt 1. A cooling mechanism 2 and a shot peening mechanism 3 are arranged sequentially on its outer side. The plastic lunch box is first fed into the cooling chamber 203 by the conveyor belt 1 for low-temperature embrittlement treatment, and then enters the shot peening chamber 301 to complete burr removal. The specific implementation steps are as follows:

[0029] The specific implementation of the refrigeration mechanism 2: The liquid nitrogen tank 201 is fixed to the rear side of the refrigeration chamber 203. Liquid nitrogen is transported to the interior of the refrigeration chamber 203 through the conveying pipe 202. The electric control valve 204 installed on the conveying pipe 202 adjusts the liquid nitrogen flow rate in real time based on the running speed of the conveyor belt 1.

[0030] The cooling box 205 with a fixed metal box structure is inside the cooling chamber 203. The mesh plate 206 is installed at the lower end of the cooling box 205. The surface of the mesh plate is evenly provided with strip-shaped gaps. The cold energy diffuses evenly into the cooling chamber 203 through the gaps, so that the surface temperature of the food box drops to below -30℃ within a few seconds.

[0031] The specific implementation of the shot peening mechanism 3: The storage hopper 308 is located below the conveyor belt 1. The shot enters the conveying pipe 310 through the feed pipe 309. The spiral conveying rod 312 located in the conveying pipe 310 is driven by the stepper motor 313. The pitch steadily conveys the shot to the discharge pipe 311 from the feed end to the discharge end. The shot uses PLA biodegradable material with a particle size of 0.8-1.2mm.

[0032] Centrifugal fan 303 distributes the shot to two branch pipes 305 through shot conveying pipe 304, and sprays it out from the first nozzle 306 and the second nozzle 307 that are vertically downward, simultaneously covering the rim of the lunch box;

[0033] After shot peening, the shot and debris slide down through the inclined recovery plate 316. The end of the recovery plate 316 is inserted into the storage hopper 308 in a plug-in manner to realize automatic shot recovery.

[0034] The support column 314 fixes the stepper motor 313 and the pipe support 315 to ensure the stability of the material conveying pipe 310 and the material discharging pipe 311 during operation.

[0035] The working principle of this utility model is as follows: This device achieves efficient removal of burrs from the surface of plastic lunch boxes through the coordinated operation of the refrigeration mechanism 2 and the shot peening mechanism 3, combined with the production terminal control system. The specific process is as follows: The plastic lunch box first enters the refrigeration chamber 203 along with the conveyor belt 1. Liquid nitrogen tank 201 injects liquid nitrogen into the refrigeration chamber 203 through the conveying pipe 202. After the liquid nitrogen flows through the electrically controlled valve 204 to adjust the flow rate, it enters the cooling box 205. The cooling box 205 evenly diffuses the cold energy through the strip-shaped gaps of the mesh plate 206, causing the surface temperature of the lunch box to drop sharply to below -30℃. The burrs become brittle due to the low temperature, but the base material remains tough. Subsequently, the lunch box enters the shot peening chamber 301, and the stepper motor... 313 drives the screw conveyor 312 via a reducer, which in turn draws the shot particles in the storage hopper 308 into the conveying pipe 310 through the feed pipe 309. The screw pitch of the screw conveyor 312 gradually decreases from the feed end to the discharge end, forming a compression structure to convey the shot to the discharge pipe 311. At the same time, the drive motor 302 drives the centrifugal fan 303 to rotate at high speed, generating strong airflow to quickly convey the shot. Finally, the shot is distributed through the shot conveying pipe 304 and the branch pipe 305 to the vertically downward first nozzle 306 and the second nozzle 307 to impact and embrittle the burrs. After shot peening, the shot slides back into the storage hopper 308 through the recovery plate 316 for recycling.

[0036] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deburring device for processing plastic lunch boxes, comprising a conveyor belt (1), characterized in that: A refrigeration mechanism (2) and a shot peening mechanism (3) are sequentially arranged on the outer side of the conveyor belt (1); the refrigeration mechanism (2) includes a liquid nitrogen tank (201), a conveying pipe (202), a refrigeration chamber (203), an electric control valve (204), a cooling box (205), and a mesh plate (206). The refrigeration chamber (203) is fixed to the outer frame of the conveyor belt (1). The liquid nitrogen tank (201) is located behind the refrigeration chamber (203) and connected to the interior of the refrigeration chamber (203) through the conveying pipe (202). An electric control valve (204) is installed on the conveying pipe (202). The cooling box (205) is fixed to the inner wall of the refrigeration chamber (203). A mesh plate (206) is provided at the lower end of the cooling box (205); the shot peening mechanism (3) includes a shot peening chamber (301), a drive motor (302), a centrifugal fan (303), a conveying pipe (204), a cooling box (205), a cooling box (206), a cooling box (205), and a shot peening mechanism (306). The shot blasting chamber (304), branch pipe (305), first nozzle (306), second nozzle (307), storage hopper (308), feed pipe (309), conveying pipe (310), discharge pipe (311), screw conveyor (312), stepper motor (313), support column (314), pipe support (315) and recovery plate (316) are fixed to the outer frame of the conveyor belt (1) on the right side of the refrigeration chamber (203). The drive motor (302) is installed on the upper end of the shot blasting chamber (301) and connected to the centrifugal fan (303). The outlet of the centrifugal fan (303) is connected to the shot conveying pipe (304). The shot conveying pipe (304) extends into the shot blasting chamber (301) and is connected to the first nozzle (306) and the second nozzle (307) through the branch pipe (305).

2. The deburring device for processing plastic lunch boxes according to claim 1, characterized in that: In the refrigeration mechanism (2), the cooling box (205) diffuses the cold energy evenly into the refrigeration chamber (203) through the strip-shaped gaps of the mesh plate (206).

3. The deburring device for processing plastic lunch boxes according to claim 1, characterized in that: In the shot peening mechanism (3), the storage hopper (308) is located below the conveyor belt (1) and connected to the conveying pipe (310) through the feeding pipe (309). The conveying pipe (310) is equipped with a spiral conveying rod (312), and the stepper motor (313) drives the spiral conveying rod (312) through a reducer.

4. The deburring device for processing plastic lunch boxes according to claim 1, characterized in that: The discharge pipe (311) connects the conveying pipe (310) and the shot conveying pipe (304). The support column (314) fixes the stepper motor (313) and the pipe support (315). The recovery plate (316) is placed obliquely below the shot blasting chamber (301) and guided to the storage hopper (308).

5. A deburring device for processing plastic lunch boxes according to claim 1, characterized in that: The first nozzle (306) and the second nozzle (307) are perpendicular to the upper surface of the conveyor belt (1), and the pitch of the spiral conveyor rod (312) gradually decreases from the feed pipe (309) to the discharge pipe (311), forming a progressive compression conveying structure.

6. A deburring device for processing plastic lunch boxes according to claim 1, characterized in that: The recycling plate (316) is installed at an angle to the right side of the conveyor belt (1), and its end is inserted into the interior of the storage hopper (308).

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