An extrusion structure for producing food-grade plastic packaging materials

Abstract

The utility model provides an extrusion structure for producing food-grade plastic packaging materials, comprising an extrusion barrel and a stirring box, wherein a feed port is arranged at the upper part of one end of the extrusion barrel, an extrusion head is arranged at the other end of the extrusion barrel, and an extrusion mechanism is arranged inside the extrusion barrel, and the extrusion barrel is arranged in a heating chamber of a constant temperature heating mechanism. By arranging the constant temperature heating mechanism on the outer side of the extrusion barrel, heating and heat preservation treatment is performed on the entire extrusion barrel to ensure the activity and extrusion effect of the internal material, and the extrusion barrel is sealed and fixed in the center of the heating chamber by using a first water tank, a second water tank, a sealing port, a sealing ring and a sealing groove, and water heated by a plurality of heating plates contacts the outer side wall of the extrusion barrel to play a role of heat conduction, and the temperature and pressure in the heating chamber are monitored in real time by a temperature sensor, an air outlet and a pressure sensor to ensure the effect of constant temperature and avoid the influence of temperature changes on the normal activity of the material.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic packaging bags, in particular to an extrusion structure for producing food-grade plastic packaging materials. Background Art

[0002] Packaging bags are widely used in the pharmaceutical and food industries. In the production of packaging bags, the material is generally melted by an extruder and then cooled and inflated by a film blowing device. The film is then prepared into a tube by a traction device and a reel device, and then heat-sealed and cut into bags. A screw extruder is generally used in the production of packaging bags.

[0003] The prior art discloses an extrusion structure for producing food-grade plastic packaging materials (publication number: CN218256693U), which includes a base plate, a plurality of columns fixed on the top of the base plate, a heat exchange box fixed on the tops of the plurality of columns, an extrusion assembly arranged in the heat exchange box, a water inlet pipe connected to the heat exchange box fixed on the top, a water outlet pipe connected to the heat exchange box fixed on the bottom, a heating water tank fixed on the top of the base plate, and an electromagnetic heater installed in the heating water tank.

[0004] However, the above technical solution and the prior art still have the following defects: during use of the device, the heated water is continuously circulated from the heat exchange box and the heating water tank through a water pump, and the intermediate cylinder is continuously heated, so that the plastic will not solidify prematurely. However, since the water circulation heating method will introduce factors such as time delay and temperature lag, and the position and speed of water flow may be uneven, it may affect the stability, uniformity and heating effect of the intermediate cylinder heating, making the overall heating temperature of the intermediate cylinder prone to deviation, which may affect the activity and stability of the internal material. Utility Model Content

[0005] The purpose of the utility model is to provide an extrusion structure for producing food-grade plastic packaging materials to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An extrusion structure for producing food-grade plastic packaging materials, comprising an extrusion barrel and a stirring box, wherein a feed port is arranged at the upper part of one end of the extrusion barrel, a stirring box is arranged at the upper part of the feed port, an extrusion head is arranged at the other end of the extrusion barrel, an extrusion mechanism is arranged inside the extrusion barrel, and the extrusion barrel is arranged in a heating chamber of a constant temperature heating mechanism;

[0008] The constant temperature heating mechanism is used for heating and heat preservation of the entire extrusion barrel, ensuring the activity of the material in the extrusion barrel during the extrusion process through the extrusion mechanism, and avoiding cooling to cause material agglomeration, which affects the extrusion effect.

[0009] Preferably, the constant temperature heating mechanism includes a first water tank, a second water tank, a sealing port, a sealing ring, a sealing groove, a heating plate, a temperature sensor, an air outlet and a pressure sensor. The first water tank and the second water tank are symmetrically arranged and fixed on both sides by bolts. The sealing ring is arranged on the outside of both ends of the extrusion barrel. A sealing groove is arranged between the sealing rings at both ends of the extrusion barrel. The sealing groove is adapted to the sealing port arranged at the center of both ends of the first water tank and the second water tank. A heating plate is arranged inside the first water tank, and the temperature sensor, the air outlet and the pressure sensor are arranged on the second water tank.

[0010] Preferably, a mixing mechanism is provided on one side of the heating chamber of the first water tank and the second water tank, and the mixing mechanism is used to stir the water in the heating chamber, thereby accelerating the heat conduction of the water in the water bath and making the water temperature in the entire heating chamber more uniform. The mixing mechanism includes a second servo motor and a stirring rod. The second servo motor is arranged at one end of the first water tank and the second water tank, and the output end of the second servo motor is connected and fixed to the stirring rods arranged in the first water tank and the second water tank through a coupling.

[0011] Preferably, the extrusion mechanism includes a push screw rod, a connecting shaft, a first pulley, a transmission belt, a second pulley and a first servo motor, the output end of the first servo motor is fixedly mounted with a second pulley, the second pulley is transmission-connected to the first pulley arranged on the connecting shaft through a transmission belt, and the connecting shaft is fixedly connected to one end of the push screw rod arranged inside the extrusion barrel.

[0012] Preferably, the mixing box includes a box body, a feeding pipe, a docking pipe and a second electric telescopic rod. A feeding pipe is provided at the bottom of the box body. The outer side of the bottom of the feeding pipe is slidably connected to the inside of the docking pipe. The two sides of the top of the docking pipe are fixedly connected to the output ends of the second electric telescopic rod. The second electric telescopic rod is provided at the bottom of the box body, and the docking pipe is used for docking and sealing the feeding pipe and the feed port.

[0013] Preferably, a cutting mechanism is provided on the upper part of the extrusion port of the extrusion head, and the cutting mechanism includes a mounting frame, a first electric telescopic rod and a cutting knife. The mounting frame is fixedly installed at the center of the upper part of the other end of the extrusion barrel, and the first electric telescopic rod is provided on the mounting frame. The output end of the first electric telescopic rod is fixedly installed with a cutting knife, and the cutting knife is used to cut the material at the extrusion port.

[0014] Preferably, the first water tank and the second water tank are respectively provided with a water outlet pipe and a water inlet pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. A constant temperature heating mechanism is arranged on the outside of the extrusion barrel to heat and insulate the entire extrusion barrel, thereby ensuring the activity of the internal material and the extrusion effect. The first water tank, the second water tank, the sealing port, the sealing ring and the sealing groove are used to seal and fix the extrusion barrel in the center of the heating chamber. Water is transported to the heating chambers of the first water tank and the second water tank through the water inlet pipe. The water inside the heating chamber is heated by energizing multiple heating plates. The heated water contacts the outer wall of the extrusion barrel to conduct heat, thereby heating the entire extrusion barrel and ensuring the activity of the internal material. The temperature and pressure in the heating chamber are monitored in real time by the temperature sensor, the air outlet and the pressure sensor to ensure the constant temperature effect and avoid the temperature change from affecting the normal activity of the material.

[0017] 2. By arranging a mixing mechanism on one side of the heating chamber of the first water tank and the second water tank, and the two mixing mechanisms are arranged diagonally, the mixing mechanism is used to stir the water in the heating chamber inside the water tank, which can promote the circulation of water in the water tank, effectively avoid regional overheating or overcooling, make the water temperature in the entire water tank more uniform, accelerate the heat conduction of the water in the water tank, and make the entire water tank reach the set constant temperature state faster, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the constant temperature heating mechanism of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the extrusion barrel of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of a mixing box of the present utility model.

[0022] In the figure: 1, extrusion barrel; 2, connecting shaft; 3, first pulley; 4, driving belt; 5, second pulley; 6, first servo motor; 7, extrusion head; 8, material cutting mechanism; 801, mounting frame; 802, first electric telescopic rod; 803, cutting knife; 9, feeding port; 10, mixing box; 101, box body; 102, feeding pipe; 103, butt joint pipe; 104, second electric telescopic rod; 11, constant temperature heating mechanism; 111, first water tank; 112, second water tank; 113, sealing port; 114, sealing ring; 115, sealing groove; 116, heating plate; 117, temperature sensor; 118, air outlet; 119, pressure sensor; 12, water inlet pipe; 13, water outlet pipe; 14, mixing mechanism; 141, second servo motor; 142, stirring rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 , the utility model provides a technical solution:

[0025] Embodiment 1:

[0026] An extrusion structure for producing food-grade plastic packaging materials, comprising an extrusion barrel 1 and a mixing box 10, wherein a feed port 9 is arranged at the upper part of one end of the extrusion barrel 1, and a mixing box 10 is arranged at the upper part of the feed port 9, and the mixing box 10 comprises a box body 101, a feed pipe 102, a butt joint pipe 103 and a second electric telescopic rod 104, a feed pipe 102 is arranged at the bottom of the box body 101, and the feed pipe 102 is arranged at the upper part of the feed port 9, and a feed valve is arranged on the feed pipe 102, and the bottom outer side of the feed pipe 102 is connected to the butt joint pipe 103 and the second electric telescopic rod 104. The inside of the tube 103 is slidably connected, and the two sides of the top end of the docking tube 103 are fixedly connected to the output ends of the second electric telescopic rod 104. The second electric telescopic rod 104 is arranged at the bottom of the box body 101. The docking tube 103 is used for the docking and sealing of the discharge tube 102 and the feed port 9. By arranging the docking tube 103 and the second electric telescopic rod 104 on the outside of the discharge tube 102, the automatic docking and sealing between the discharge tube 102 and the feed port 9 is realized by driving the second electric telescopic rod 104, thereby realizing the discharge processing.

[0027] An extrusion head 7 is provided at the other end of the extrusion barrel 1, and an extrusion mechanism is provided inside the extrusion barrel 1, the extrusion mechanism includes a pushing screw rod, a connecting shaft 2, a first pulley 3, a transmission belt 4, a second pulley 5 and a first servo motor 6, the output end of the first servo motor 6 is fixedly mounted with a second pulley 5, the second pulley 5 is transmission-connected to the first pulley 3 arranged on the connecting shaft 2 through the transmission belt 4, and the connecting shaft 2 is fixedly connected to one end of the pushing screw rod arranged inside the extrusion barrel 1.

[0028] The extrusion barrel 1 is arranged in the heating chamber of the constant temperature heating mechanism 11, and the constant temperature heating mechanism 11 is used to heat and keep the extrusion barrel 1 as a whole, to ensure the activity of the material in the extrusion barrel 1 during the extrusion process through the extrusion mechanism, and to avoid cooling causing material agglomeration, which affects the extrusion effect.

[0029] The constant temperature heating mechanism 11 includes a first water tank 111, a second water tank 112, a sealing port 113, a sealing ring 114, a sealing groove 115, a heating plate 116, a temperature sensor 117, an air outlet 118 and a pressure sensor 119. The first water tank 111 and the second water tank 112 are symmetrically arranged, and the two sides are fixed by bolt connection. The sealing ring 114 is arranged on the outer sides of the two ends of the extrusion barrel 1, and a sealing groove 115 is arranged between the sealing rings 114 at both ends of the extrusion barrel 1. The sealing groove 115 is adapted to the sealing port 113 arranged at the center of the two ends of the first water tank 111 and the second water tank 112. A heating plate 116 is arranged inside the first water tank 111, a temperature sensor 117, an air outlet 118 and a pressure sensor 119 are arranged on the second water tank 112, and an air outlet valve is arranged on the air outlet 118. The first water tank 111 and the second water tank 112 are respectively provided with a water outlet pipe 13 and a water inlet pipe 12.

[0030] In this embodiment, a constant temperature heating mechanism 11 is provided on the outside of the extrusion barrel 1 to achieve heating and heat preservation treatment of the extrusion barrel 1 as a whole, so as to ensure the activity of the internal material and the extrusion effect. The first water tank 111, the second water tank 112, the sealing port 113, the sealing ring 114 and the sealing groove 115 are used to seal and fix the extrusion barrel 1 in the center of the heating chamber. Water is transported to the heating chambers of the first water tank 111 and the second water tank 112 through the water inlet pipe 12. The water inside the heating chamber is heated by energizing a plurality of heating plates 116. The heated water contacts the outer wall of the extrusion barrel 1 to conduct heat, so as to achieve heating of the extrusion barrel 1 as a whole, so as to ensure the activity of the internal material. The temperature and pressure in the heating chamber are monitored in real time by the temperature sensor 117, the air outlet 118 and the pressure sensor 119 to ensure the constant temperature effect and prevent the temperature change from affecting the normal activity of the material.

[0031] Embodiment 2:

[0032] Based on the first embodiment, the difference from the first embodiment is that:

[0033] A mixing mechanism 14 is provided on one side of the heating chamber of the first water tank 111 and the second water tank 112. The mixing mechanism 14 is used to stir the water in the heating chamber, thereby accelerating the heat conduction of the water in the water bath and making the water temperature in the entire heating chamber more uniform. The mixing mechanism 14 includes a second servo motor 141 and a stirring rod 142. The second servo motor 141 is provided at one end of the first water tank 111 and the second water tank 112, and the output end of the second servo motor 141 is connected and fixed to the stirring rod 142 provided in the first water tank 111 and the second water tank 112 through a coupling.

[0034] In the present embodiment, a mixing mechanism 14 is provided on one side of the heating chamber of the first water tank 111 and the second water tank 112. The two mixing mechanisms 14 are arranged diagonally. The mixing mechanism 14 is used to stir the water in the heating chamber inside the water tank, which can promote the circulation of water in the water tank, effectively avoid regional overheating or overcooling, make the water temperature in the entire water tank more uniform, accelerate the heat conduction of the water in the water tank, and make the entire water tank reach the set constant temperature state more quickly, thereby improving work efficiency.

[0035] A cutting mechanism 8 is provided at the upper part of the extrusion port of the extrusion head 7, and the cutting mechanism 8 includes a mounting frame 801, a first electric telescopic rod 802 and a cutting knife 803. The mounting frame 801 is fixedly installed at the center of the upper part of the other end of the extrusion barrel 1, and the first electric telescopic rod 802 is provided on the mounting frame 801. The output end of the first electric telescopic rod 802 is fixedly installed with a cutting knife 803, and the cutting knife 803 is used for cutting the material at the extrusion port. By arranging the cutting mechanism 8 at the upper part of the extrusion head, the extruded material can be automatically cut off, thereby improving the convenience of use.

[0036] Working principle: first, add a sufficient amount of water to the heating chamber inside the water tank so that the water level is higher than the position of the internal extrusion barrel 1, and heat the water in the heating chamber through the heating plate 116. During the heating process, drive the mixing mechanism 14 to stir the water in the heating chamber to make the water temperature in the entire water tank more uniform, accelerate the heat conduction of the water in the water tank, monitor the water temperature through the temperature sensor 117, and make the entire water tank reach the set constant temperature state faster, so as to realize constant temperature heating of the extrusion barrel 1 and ensure the activity of the internal material. Move the material to the extrusion head 7 through the extrusion mechanism, and extrude the material through the extrusion head 7. During the extrusion of the material, the material can be automatically cut off by the cutting mechanism 8 to improve the convenience of operation and work efficiency.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion structure for producing food-grade plastic packaging materials, comprising an extrusion barrel (1) and a stirring box (10), characterized in that: A feed port (9) is provided at the upper part of one end of the extrusion barrel (1), a stirring box (10) is provided at the upper part of the feed port (9), an extrusion head (7) is provided at the other end of the extrusion barrel (1), and an extrusion mechanism is provided inside the extrusion barrel (1), and the extrusion barrel (1) is arranged in a heating chamber of a constant temperature heating mechanism (11); The constant temperature heating mechanism (11) is used to heat and insulate the entire extrusion barrel (1), thereby ensuring the activity of the material during extrusion through the extrusion mechanism inside the extrusion barrel (1), and avoiding agglomeration of the material due to cooling, which would affect the extrusion effect.

2. The extrusion structure for producing food-grade plastic packaging materials according to claim 1, characterized in that: The constant temperature heating mechanism (11) comprises a first water tank (111), a second water tank (112), a sealing port (113), a sealing ring (114), a sealing groove (115), a heating plate (116), a temperature sensor (117), an air outlet (118) and a pressure sensor (119). The first water tank (111) and the second water tank (112) are symmetrically arranged and are fixed at both sides by bolt connection. The sealing ring (114) is arranged on the outer sides of both ends of the extrusion barrel (1). A sealing groove (115) is arranged between the sealing rings (114) at both ends of the extrusion barrel (1). The sealing groove (115) is matched with the sealing port (113) arranged at the center of both ends of the first water tank (111) and the second water tank (112). A heating plate (116) is arranged inside the first water tank (111). The temperature sensor (117), the air outlet (118) and the pressure sensor (119) are arranged on the second water tank (112).

3. The extrusion structure for producing food-grade plastic packaging materials according to claim 2, characterized in that: A mixing mechanism (14) is provided on one side of the heating chamber of the first water tank (111) and the second water tank (112). The mixing mechanism (14) is used to stir the water in the heating chamber, thereby accelerating the heat conduction of the water in the water bath and making the water temperature in the entire heating chamber more uniform. The mixing mechanism (14) comprises a second servo motor (141) and a stirring rod (142). The second servo motor (141) is provided at one end of the first water tank (111) and the second water tank (112), and the output end of the second servo motor (141) is connected and fixed to the stirring rod (142) provided in the first water tank (111) and the second water tank (112) through a coupling.

4. The extrusion structure for producing food-grade plastic packaging materials according to claim 1, characterized in that: The extrusion mechanism comprises a push screw, a connecting shaft (2), a first pulley (3), a transmission belt (4), a second pulley (5) and a first servo motor (6); the output end of the first servo motor (6) is fixedly mounted with the second pulley (5); the second pulley (5) is transmission-connected to the first pulley (3) arranged on the connecting shaft (2) through the transmission belt (4); the connecting shaft (2) is fixedly connected to one end of the push screw arranged inside the extrusion barrel (1).

5. The extrusion structure for producing food-grade plastic packaging materials according to claim 1, characterized in that: The mixing box (10) comprises a box body (101), a feeding pipe (102), a butt joint pipe (103) and a second electric telescopic rod (104); the bottom of the box body (101) is provided with a feeding pipe (102); the outer side of the bottom of the feeding pipe (102) is slidably connected to the inside of the butt joint pipe (103); the top sides of the butt joint pipe (103) are fixedly connected to the output ends of the second electric telescopic rod (104); the second electric telescopic rod (104) is provided at the bottom of the box body (101); and the butt joint pipe (103) is used for butt joint sealing between the feeding pipe (102) and the feeding port (9).

6. The extrusion structure for producing food-grade plastic packaging materials according to claim 1, characterized in that: A material cutting mechanism (8) is arranged at the upper part of the extrusion outlet of the extrusion head (7), and the material cutting mechanism (8) comprises a mounting frame (801), a first electric telescopic rod (802) and a cutting knife (803). The mounting frame (801) is fixedly mounted at the center of the upper part of the other end of the extrusion barrel (1), and the first electric telescopic rod (802) is arranged on the mounting frame (801). The output end of the first electric telescopic rod (802) is fixedly mounted with a cutting knife (803), and the cutting knife (803) is used to cut the material at the extrusion outlet.

7. The extrusion structure for producing food-grade plastic packaging materials according to claim 2, characterized in that: The first water tank (111) and the second water tank (112) are respectively provided with a water outlet pipe (13) and a water inlet pipe (12).

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