Foamed plastic packing material pre-foaming device

Abstract

The utility model relates to a foamed plastic packing material pre-foaming device which comprises a foaming barrel with a heating plate arranged on the inner side wall, a motor I is arranged on a top cover plate of the foaming barrel, a driving shaft extending into the foaming barrel is arranged on the motor I, a plurality of stirring rods are installed on the driving shaft, and a cleaning plate is movably connected to the bottom end of the driving shaft; a plurality of groups of convex seats are arranged at the top of the outer side wall of the foaming barrel, screw pipes connected with the edge of the bottom of the cover plate are slidably arranged on the convex seats, screw rods connected with a motor II are connected into the screw pipes in a threaded mode, heating pipes are arranged in the side wall of the stirring rod, and a wire connected with the heating pipes is arranged in the driving shaft. An annular seat connected with the outer wall of the driving shaft is further arranged on the stirring rod, a sleeve is in threaded connection with the annular seat, a circular plate is arranged in an opening in one end of the sleeve, and a through hole allowing the corresponding stirring rod to penetrate through is formed in the circular plate. The device is simple in structure and convenient to use.

Description

Technical Field

[0001] The invention relates to the field of foam plastic production, in particular to a foam plastic packaging material pre-foaming device. Background Art

[0002] Expanded Polystyrene (EPS) is a lightweight polymer. It is made by adding a foaming agent to polystyrene resin and heating it to soften it, generating gas to form a rigid closed-cell foam plastic. EPS processing generally goes through several steps, including pre-foaming, rounding and molding. During the pre-foaming process, the polymer particles containing the foaming agent soften under heating conditions and the foaming agent evaporates.

[0003] In the existing EPS foam plastic packaging material pre-foaming device, during the heating process, the material closer to the inner wall is subjected to greater heat energy, which is prone to uneven heating. Therefore, the material inside the foaming tube is often stirred by a stirring roller. However, during the cooling process, a part of the material will adhere to the stirring roller, and it is difficult and extremely time-consuming to clean it. Therefore, there is a new EPS foam plastic packaging material pre-foaming device with patent number CN218700706U. Although this device can solve the above problems, it has the following defects, such as: when the material is cooled and adheres to the stirring rod, it is difficult to scrape off the adhered material or clean the adhered material only by sliding the cleaning ring. At the same time, since the cleaning ring is not fixed, the stirring rod generates a large swinging force when rotating to stir the material, which will drive the cleaning ring to slide on its outer wall, making it easy for violent friction between the two, which will easily cause damage to both and is not conducive to their safety. Summary of the invention

[0004] The purpose of the present invention is to provide a foam plastic packaging material pre-foaming device.

[0005] The technical problem of the present invention is mainly solved by the following technical solutions:

[0006] A foam plastic packaging material pre-foaming device, comprising a foaming barrel with a heating plate arranged on the inner side wall, a motor 1 arranged on the top cover plate of the foaming barrel, a driving shaft extending into the foaming barrel arranged on the motor 1, wherein a plurality of stirring rods are installed on the driving shaft, and a cleaning plate is movably connected to the bottom end of the driving shaft;

[0007] A plurality of groups of convex seats are arranged on the top of the outer wall of the foaming barrel, wherein a screw tube connected to the bottom edge of the cover plate is slidably arranged on the convex seat, and a screw connected to the motor II is screwed in the screw tube, a heating tube is arranged in the side wall of the stirring rod, wherein a wire connected to the heating tube is arranged in the driving shaft, an annular seat connected to the outer wall of the driving shaft is also arranged on the stirring rod, wherein a sleeve is screwed on the annular seat, a circular plate is arranged in the opening at one end of the sleeve, wherein the circular plate is provided with a through hole for the corresponding stirring rod to pass through, a circle of arc grooves I are correspondingly arranged on the outer arc wall of the circular plate and the inner arc wall of the sleeve, wherein a plurality of balls I are arranged in two groups of arc grooves I.

[0008] As a preferred solution, the size of the cleaning plate is adapted to the size of the foaming barrel, and a circular hole for the driving shaft to pass through is provided in the middle of the cleaning plate, wherein a circle of arc grooves II are correspondingly provided on the inner arc wall of the circular hole and the outer arc wall of the driving shaft, and a number of balls II are provided in the two groups of arc grooves II.

[0009] As a preferred solution, the outer side wall of the spiral tube is a smooth structure, wherein the convex seat is provided with a mounting hole for the spiral tube to pass through.

[0010] As a preferred solution, the annular seat is fixedly connected to the stirring rod and the driving shaft, wherein an external thread is provided on the outer arc wall of the annular seat, and an internal thread screwed to the external thread is provided on the inner wall of the sleeve.

[0011] As a preferred solution, the size of the through hole is matched with the size of the stirring rod.

[0012] The beneficial effects of the present invention are as follows: in the present invention, since the sleeve is screwed with the annular seat, the circular plate is movably fixed on the stirring rod, so that when the stirring rod rotates, the through hole on the circular plate will not be driven to slide on the outer wall of the stirring rod, thereby effectively ensuring the safety between the two; and when it is necessary to clean the adhered material on the stirring rod, the wire can be connected to the power connection line, and then the heating tube can be energized to make it work. After it heats the stirring rod, the material adhered to its surface can be easily cleaned and scraped off, and at the same time, the rotatable sleeve can be rotated on the annular seat, so that it is separated from the annular seat and moves outward, thereby driving the through hole on the circular plate to slide on the stirring rod to scrape off the adhered material on its surface after being heated, thereby achieving the purpose of facilitating the cleaning of the adhered material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 yes Figure 2 Enlarged view of point B in the middle.

[0016] In the figure: 1, foaming barrel, 2, cover plate, 3, motor I, 4, driving shaft, 5, stirring rod, 6, cleaning plate, 7, convex seat, 8, screw tube, 9, screw rod, 10, motor II, 11, heating tube, 12, wire, 13, annular seat, 14, sleeve, 15, circular plate, 16, ball I, 17, ball II, 18, heating plate. DETAILED DESCRIPTION

[0017] The following are examples and the attached Figure 1-3 , the technical solution of the present invention is further specifically described.

[0018] A foam plastic packaging material pre-foaming device, comprising a foaming barrel 1 with a heating plate 18 on the inner side wall, a motor 13 on the top cover plate 2 of the foaming barrel 1, a driving shaft 4 extending into the foaming barrel 1, a plurality of stirring rods 5 installed on the driving shaft 4, and a cleaning plate 6 movably connected to the bottom end of the driving shaft 4, the size of the cleaning plate 6 is adapted to the size of the foaming barrel 1, a circular hole (not shown in the figure) for the driving shaft 4 to pass through is provided in the middle of the cleaning plate 6, a circle of arc grooves II (not shown in the figure) are correspondingly provided on the inner arc wall of the circular hole and the outer arc wall of the driving shaft 4, and a plurality of balls II17 are provided in two groups of arc grooves II;

[0019] A plurality of groups of bosses 7 are arranged on the top of the outer wall of the foaming barrel 1, wherein a screw tube 8 connected to the bottom edge of the cover plate 2 is slidably arranged on the boss 7, and a screw 9 connected to the motor II10 is screwed in the screw tube 8, a heating tube 11 is arranged in the side wall of the stirring rod 5, wherein a wire 12 connected to the heating tube 11 is arranged in the driving shaft 4, and an annular seat 13 connected to the outer wall of the driving shaft 4 is also arranged on the stirring rod 5, wherein a sleeve 14 is screwed on the annular seat 13, and a circular plate 15 is arranged in the opening at one end of the sleeve 14, wherein the circular plate 15 is provided with a through hole (not shown in the figure) for the stirring rod 5 to pass through, and the size of the through hole is adapted to the size of the stirring rod 5, and a circle of arc grooves I (not shown in the figure) are correspondingly arranged on the outer arc wall of the circular plate 15 and the inner arc wall of the sleeve 14, wherein a plurality of balls I16 are arranged in two groups of arc grooves I.

[0020] In this embodiment, the outer wall of the screw tube 8 is a smooth structure, wherein the boss 7 is provided with a mounting hole (not shown in the figure) for the screw tube 8 to pass through. The boss 7 plays a fixing role on the screw tube 8 moving up and down through the mounting hole to prevent it from tilting and falling.

[0021] In this embodiment, the annular seat 13 is fixedly connected to the stirring rod 5 and the driving shaft 4, wherein an external thread is arranged on the outer arc wall of the annular seat 13, and an internal thread screwed to the external thread is arranged on the inner wall of the sleeve 14.

[0022] like Figure 1 , 2 As shown in Figures 3 and 4, the connector of the wire 12 in the present invention is located above the driving shaft 4, so that it will not be covered by the material in the foaming barrel 1. When the driving shaft 4 drives the stirring rod 5 to stir the material in the foaming barrel 1, it will drive the arc groove II to rotate on the corresponding ball II17, so that it will not drive the cleaning plate 6 to rotate together. At the same time, the cleaning plate 6 can be effectively prevented from sliding off the driving shaft 4 by hanging the ball II17 on the arc groove II. Since the sleeve 14 is screwed with the annular seat 13, the circular plate 15 is movably fixed on the stirring rod 5, so that when the stirring rod 5 rotates, the through hole on the circular plate 15 will not be driven to slide on the outer wall of the stirring rod 5, thereby effectively ensuring the safety between the two.

[0023] After the pre-foaming of the foam plastic is completed, the motor II10 drives the screw rod 9 to rotate in the screw tube 8, and drives the screw tube 8 to move upward to drive the cover plate 2 to move upward at the same time, and the cover plate 2 drives the drive shaft 4, the stirring rod 5 and the cleaning plate 6 and other components to slowly slide upward from the foaming barrel 1. When the cleaning plate 6 moves upward, it will drive the material in the foaming barrel 1 to be slowly ejected from the inside, so as to facilitate the removal of the material. At the same time, the moving cleaning plate 6 can clean the inner wall of the foaming barrel 1;

[0024] When it is necessary to clean the adhered material on the stirring rod 5, the wire 12 can be connected to the power connection line, and then the heating tube 11 is energized to make it work. When the stirring rod 5 is heated, the material adhered to its surface is easy to be cleaned and scraped off, and the trace amount of adhered material is also cooled quickly after heating. At the same time, the rotatable sleeve 14 can be rotated on the annular seat 13, so that it is separated from the annular seat 13 and moves outward, thereby driving the through hole on the circular plate 15 to slide on the stirring rod 5 to scrape off the adhered material on its surface after being heated, so as to facilitate the cleaning of the adhered material. When the sleeve 14 is rotated, it will drive the arc groove I to rotate on the ball I16, so that it will not drive the circular plate 15 to rotate together. The fundamental reason is to prevent the stirring rod 5 from pressing against the through hole and indirectly pressing against the sleeve 14 through the circular plate 15 when the vertical cross-section of the stirring rod 5 is polygonal or irregular, thereby affecting the rotation of the sleeve 14 on the annular seat 13 and causing the sleeve 13 to be unable to be screwed and fixed to the annular seat 14.

[0025] The present invention is described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A foam plastic packaging material pre-foaming device, comprising a foaming barrel with a heating plate disposed on the inner wall, characterized in that: A motor 1 is arranged on the top cover plate of the foaming barrel, and a driving shaft extending into the foaming barrel is arranged on the motor 1, wherein a plurality of stirring rods are installed on the driving shaft, and a cleaning plate is movably connected to the bottom end of the driving shaft; A plurality of groups of convex seats are arranged on the top of the outer wall of the foaming barrel, wherein a screw tube connected to the bottom edge of the cover plate is slidably arranged on the convex seat, and a screw connected to the motor II is screwed in the screw tube, a heating tube is arranged in the side wall of the stirring rod, wherein a wire connected to the heating tube is arranged in the driving shaft, an annular seat connected to the outer wall of the driving shaft is also arranged on the stirring rod, wherein a sleeve is screwed on the annular seat, a circular plate is arranged in the opening at one end of the sleeve, wherein the circular plate is provided with a through hole for the corresponding stirring rod to pass through, a circle of arc grooves I are correspondingly arranged on the outer arc wall of the circular plate and the inner arc wall of the sleeve, wherein a plurality of balls I are arranged in two groups of arc grooves I.

2. A foam plastic packaging material pre-foaming device according to claim 1, characterized in that: The size of the cleaning plate is adapted to the size of the foaming barrel, and a circular hole for the driving shaft to pass through is arranged in the middle of the cleaning plate, wherein a circle of arc grooves II are correspondingly arranged on the inner arc wall of the circular hole and the outer arc wall of the driving shaft, and a number of balls II are arranged in the two groups of arc grooves II.

3. A foam plastic packaging material pre-foaming device according to claim 1, characterized in that: The outer side wall of the spiral tube is a smooth structure, wherein the convex seat is provided with a mounting hole for the spiral tube to pass through.

4. A foam plastic packaging material pre-foaming device according to claim 1, characterized in that: The annular seat is fixedly connected to the stirring rod and the driving shaft, wherein an external thread is arranged on the outer arc wall of the annular seat, and an internal thread which is screwed to the external thread is arranged on the inner wall of the sleeve.

5. A foam plastic packaging material pre-foaming device according to claim 1, characterized in that: The size of the through hole is matched with the size of the stirring rod.

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