Double-stage plasticizing extruder

Abstract

The utility model discloses a double-step plasticizing extruder, and particularly relates to the technical field of plastic processing, the double-step plasticizing extruder comprises a working table, a first-step processing cylinder and a second processing cylinder are arranged on the working table, and extrusion conveying spiral blades are rotatably arranged in the first-step processing cylinder and the second processing cylinder; driving motors are arranged on the first-stage machining barrel and the second machining barrel, the output ends of the two driving motors are in butt joint with the two extrusion conveying spiral blades correspondingly, the first-stage machining barrel and the second machining barrel are connected through a connecting pipe, a feeding hopper is arranged on the first-stage machining barrel, and a discharging hopper is arranged on the second-stage machining barrel. And a vibration filtering assembly is arranged in the feeding hopper. According to the utility model, through the arrangement of the vibration filtering assembly, the kinetic energy for extruding the conveying spiral blade to convey raw materials in the first-stage processing cylinder can be converted into the kinetic energy for vibrating and filtering the raw materials, so that the production cost of a vibrator arranged for vibrating and screening the raw materials due to the need of a filtering plate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastics processing, more specifically, the utility model relates to a double -stage plasticizing extruder. BACKGROUND

[0002] Double -stage plasticizing extruder is a kind of equipment for plastics processing, it is usually used for the efficient production of plastic products, especially in the mixing, plasticizing and extrusion process of plastics, its "double -stage" refers to having two different plasticizing stages in extruder, each stage has special screw design and working area to ensure that plastic materials can be more fully mixed and plasticized in two stages. First stage (primary plasticization): in this stage, material enters extruder, and raw material is heated and preliminarily mixed and plasticized by the rotation and pressure of screw. The purpose of this stage is to soften the material and begin to form uniform melt. Second stage (fine plasticization): in the second stage, the material is further plasticized and mixed. The screw design in this stage is usually more complex, which can help more fully mix different additives, fillers, pigments, etc., to ensure the uniformity and consistency of plastic melt, while also improving the quality and flowability of the material

[0003] At present, when double -stage plasticizing extruder is loaded, raw material is usually directly added to the first stage extruder, and a filter plate is usually provided to filter the raw material added to the first stage extruder, in order to improve the filtering efficiency of the filter plate, a vibrator is provided on the equipment to provide kinetic energy for the vibration of the filter plate. Since the vibrator is relatively high in cost, the production cost of the extruder will be increased by setting the vibrator to vibrate the filter plate. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of the utility model provide a double -stage plasticizing extruder to solve the problems raised in the above background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a double -stage plasticizing extruder, comprising a workbench, the workbench is provided with first stage processing cylinder and second processing cylinder, extrusion conveying spiral blade is rotatably arranged in the first stage processing cylinder and the second processing cylinder, drive motor is arranged on the first stage processing cylinder and the second processing cylinder, the output ends of two drive motors are respectively butt jointed with two extrusion conveying spiral blades, the first stage processing cylinder and the second processing cylinder are connected by connecting pipe, the first stage processing cylinder is provided with a feeding hopper, a vibration filtering assembly is arranged in the feeding hopper, the vibration filtering assembly is used to filter the raw material added to the first stage processing cylinder, and the kinetic energy of the raw material conveyed by the extrusion conveying spiral blade in the first stage processing cylinder can be converted into the kinetic energy of the raw material vibration filtering.

[0006] In a preferred embodiment, the vibration filtering assembly includes a limiting plate disposed in the feed hopper and a protrusion disposed on the extrusion conveying spiral blade disposed in the first-stage processing cylinder. A filter plate is disposed on the upper surface of the limiting plate, and a push plate is disposed on the lower surface of the filter plate. One end of the push plate is abutted against the extrusion conveying spiral blade in the first-stage processing cylinder. A dust suppression assembly is disposed in the feed hopper.

[0007] In a preferred embodiment, the dust suppression assembly includes two fixed rods disposed inside the feed hopper and two dustproof plates rotatably connected inside the feed hopper. One end of the feed hopper has a receiving cavity, a top plate is inserted into the receiving cavity, and a helical spring is disposed at the bottom of the inner side of the receiving cavity. One end of the helical spring is connected to the top plate inside the receiving cavity.

[0008] In a preferred embodiment, a slider is rotatably mounted on the top plate via a connecting plate, and a groove is provided on the lower end face of the dustproof plate, with the two sliders slidably connected in the two grooves respectively.

[0009] In a preferred embodiment, the two dustproof plates are located above the two fixing rods, and the positions of the two dustproof plates correspond to those of the two fixing rods.

[0010] In a preferred embodiment, the cross-section of the protrusion is arc-shaped, one end of the push plate has an arc-shaped cross-section, and the push plate and the protrusion are on the same vertical line.

[0011] In a preferred embodiment, the limiting plate has a U-shaped cross-section, the feed hopper is narrow at the bottom and wide at the top, and both the limiting plate and the filter plate are located in the upper wide part of the feed hopper.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] By setting up a vibration filter assembly, the kinetic energy of the raw material conveyed by the extrusion conveyor spiral blade in the first-stage processing cylinder can be converted into the kinetic energy of the raw material vibration filtration. This reduces the production cost of the vibrator required for the filter plate to vibrate and screen the raw material. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a first-view cross-sectional view of the first-stage processing cylinder and feed hopper of this utility model.

[0016] Figure 3 This is a second perspective view of the first-stage processing cylinder and feed hopper of this utility model.

[0017] Figure 4 It is the sectional view of the feeding hopper of the utility model.

[0018] Figure 5 It is the sectional view of the fixed rod of the utility model.

[0019] The figure mark is: 1, workbench;2, first stage processing cylinder;3, second processing cylinder;4, connecting pipe;5, driving motor;6, feeding hopper;7, extrusion conveying spiral blade;8, vibration filtering assembly;81, limit plate;82, lug;83, filter plate;84, push plate;9, dust falling assembly;91, fixed rod;92, dustproof plate;93, containing cavity;94, top plate;95, spiral spring;96, sliding block;97, sliding slot. Specific implementation

[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] As shown in the accompanying Figures 1-5 The utility model provides a double -stage plasticization extruder, including workbench 1, first stage processing cylinder 2 and second processing cylinder 3 are provided on the workbench 1, extrusion conveying spiral blade 7 is rotatably arranged in first stage processing cylinder 2 with second processing cylinder 3, driving motor 5 is arranged on first stage processing cylinder 2 with second processing cylinder 3, the output end of two driving motor 5 is respectively butt joint with two extrusion conveying spiral blade 7, first stage processing cylinder 2 with second processing cylinder 3 is connected through connecting pipe 4, feeding hopper 6 is arranged on first stage processing cylinder 2, vibration filtering assembly 8 is arranged in feeding hopper 6, vibration filtering assembly 8 is used to filter raw materials added in first stage processing cylinder 2, and the kinetic energy of the raw materials conveyed by extrusion conveying spiral blade 7 in first stage processing cylinder 2 can be converted into the kinetic energy of raw material vibration filtering.

[0022] As shown in the accompanying Figure 3 Vibration filtering assembly 8 includes limit plate 81 arranged in feeding hopper 6 and lug 82 arranged on extrusion conveying spiral blade 7 in first stage processing cylinder 2, filter plate 83 is arranged on the upper end surface of limit plate 81, push plate 84 is arranged on the lower end surface of filter plate 83, one end of push plate 84 is arranged on extrusion conveying spiral blade 7 in first stage processing cylinder 2, dust falling assembly 9 is arranged in feeding hopper 6.

[0023] The utility model discloses a first stage processing cylinder 2, the first stage processing cylinder 2 is provided with the vibration filtering assembly 8, the vibration filtering assembly 8 is provided with the extrusion conveying spiral blade 7, the extrusion conveying spiral blade 7 is provided with the push plate 84, the push plate 84 is connected with the filter plate 83, the filter plate 83 is provided with the limiting plate 81, the limiting plate 81 is provided with the protruding block 82, the protruding block 82 is provided with the driving motor 5.

[0024] The vibration filtering assembly 8 can convert the kinetic energy of the extrusion conveying spiral blade 7 in the first stage processing cylinder 2 into kinetic energy of vibration filtering of the raw materials, so that the production cost of the vibrator for vibration screening of the raw materials by the filter plate 83 is reduced.

[0025] As shown in Figures 1 to 4, the dust falling assembly 9 includes two fixed rods 91 arranged in the feeding hopper 6 and two dustproof plates 92 rotationally connected in the feeding hopper 6. Figure 4 Figure 5 The dust falling assembly 9 includes two fixed rods 91 arranged in the feeding hopper 6 and two dustproof plates 92 rotationally connected in the feeding hopper 6.

[0026] The top plate 94 is rotationally provided with a sliding block 96 through a connecting plate, and the lower end surface of each dustproof plate 92 is provided with a sliding groove 97.

[0027] When the raw materials need to be put into the feeding hopper 6, the raw materials are placed on the two dustproof plates 92 of the two feeding hoppers 6, the dustproof plates 92 are forced to turn over to the lower side of the feeding hopper 6, the dustproof plates 92 are pressed against the spiral spring 95 in the fixed rod 91 through the top plate 94, the dustproof plates 92 are inclined, the raw materials on the dustproof plates 92 slide to the feeding hopper 6 along the inclined surface of the dustproof plates 92, the upper end surface of the feeding hopper 6 is not affected by gravity, the dustproof plates 92 return to the original position under the elastic force of the spiral spring 95, and the dust generated by the raw materials in the feeding hopper 6 is limited in the feeding hopper 6.

[0028] The dust falling assembly 9 can timely separate the dust generated by the raw materials in the feeding hopper 6 from the outside, so that the overflow problem of the dust in the feeding hopper 6 is reduced.

[0029] The two dustproof plates 92 are located above the two fixed rods 91, and the two dustproof plates 92 are respectively located in positions corresponding to the two fixed rods 91.​

[0030] The cross section of the convex block 82 is circular arc, and the cross section of one end of the push plate 84 is circular arc, and the push plate 84 is in the same vertical line with the convex block 82.

[0031] The cross section of the limiting plate 81 is a back-shaped, and the feeding hopper 6 is narrow at the lower part and wide at the upper part, and the limiting plate 81 and the filtering plate 83 are located at the wide part of the feeding hopper 6.

[0032] The working principle of the utility model is as follows:

[0033] When the extrusion conveying spiral blade 7 is driven by the driving motor 5 to convey the raw materials in the first stage processing cylinder 2, the rotation of the extrusion conveying spiral blade 7 drives the rotation of the convex block 82 thereon, when the convex block 82 rotates to one end of the push plate 84, the push plate 84 pushes the filtering plate 83 to move upwards, when the convex block 82 is staggered with one end of the push plate 84, the push plate 84 restores to the upper end surface of the limiting plate 81, and the filtering plate 83 on the upper end surface of the limiting plate 81 vibrates in the feeding hopper 6, at this time, the raw materials are put into the feeding hopper 6, and the vibrating filtering plate 83 vibrates and filters the raw materials in the feeding hopper 6; when it is needed to put raw materials into the feeding hopper 6, the raw materials are placed on the two dustproof plates 92 of the two feeding hoppers 6, the dustproof plates 92 are forced to turn downwards to the inside of the feeding hopper 6, the turning of the dustproof plates 92 extrudes the spiral spring 95 in the fixed rod 91 through the top plate 94, at this time, the dustproof plates 92 are inclined, the raw materials on the dustproof plates 92 slide to the feeding hopper 6 through the inclined surface of the dustproof plates 92, when the raw materials on the dustproof plates 92 slide to the feeding hopper 6, the upper end surface of the feeding hopper 6 is not affected by gravity, at this time, the dustproof plates 92 restore to the original position under the elastic force of the spiral spring 95, and the dust generated by the raw materials added into the feeding hopper 6 is limited in the feeding hopper 6.

[0034] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0035] Secondly: the utility model discloses the embodiment in the drawing, only relates to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, in the case where there is no conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0036] Finally: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A double-stage plasticizing extruder, comprising a workbench (1), a first-stage processing cylinder (2) and a second-stage processing cylinder (3) arranged on the workbench (1), extrusion conveying helical blades (7) rotatably arranged in the first-stage processing cylinder (2) and the second-stage processing cylinder (3), drive motors (5) arranged on the first-stage processing cylinder (2) and the second-stage processing cylinder (3), the output ends of the two drive motors (5) respectively abutting the two extrusion conveying helical blades (7), and the first-stage processing cylinder (2) and the second-stage processing cylinder (3) being connected through a connecting pipe (4). The first stage processing cylinder (2) is provided with a feeding hopper (6), the feeding hopper (6) is provided with a vibration filtering assembly (8), the vibration filtering assembly (8) is used for filtering raw materials added into the first stage processing cylinder (2), and the kinetic energy of the raw materials conveyed by the extrusion conveying spiral blade (7) in the first stage processing cylinder (2) can be converted into the kinetic energy of the vibration filtering of the raw materials.

2. A twin-stage plasticating extruder according to claim 1, characterized in that: The vibration filtering assembly (8) comprises a limiting plate (81) arranged in the feeding hopper (6) and a protruding block (82) arranged on the extrusion conveying spiral blade (7) in the first stage processing cylinder (2), the limiting plate (81) is provided with a filter plate (83) on the upper end surface, the lower end surface of the filter plate (83) is provided with a push plate (84), one end of the push plate (84) is arranged on the extrusion conveying spiral blade (7) in the first stage processing cylinder (2), and the feeding hopper (6) is provided with a dust falling assembly (9).

3. A twin-stage plasticating extruder according to claim 2, characterized in that: The dust falling assembly (9) comprises two fixed rods (91) arranged in the feeding hopper (6) and two dustproof plates (92) rotatably connected in the feeding hopper (6), one end of the feeding hopper (6) is provided with a containing cavity (93), the containing cavity (93) is provided with a top plate (94) inserted therein, the inner bottom end of the containing cavity (93) is provided with a spiral spring (95), and one end of the spiral spring (95) is connected with the top plate (94) in the containing cavity (93).

4. A twin-stage plasticating extruder according to claim 3, characterized in that: The top plate (94) is rotatably provided with a sliding block (96) through a connecting plate, the lower end surface of the dustproof plate (92) is provided with a sliding groove (97), and the two sliding blocks (96) are slidably connected in the two sliding grooves (97) respectively.

5. A two-stage plasticating extruder according to claim 3, characterized in that: The two dustproof plates (92) are located above the two fixed rods (91), and the two dustproof plates (92) are respectively located in position corresponding to the two fixed rods (91).

6. A twin-stage plasticating extruder according to claim 2, characterized in that: The protruding block (82) is in arc shape in cross section, one end of the push plate (84) is in arc shape in cross section, and the push plate (84) and the protruding block (82) are located on the same vertical line.

7. A two-stage plasticating extruder as claimed in claim 2, wherein: The limiting plate (81) is in H-shaped in cross section, the feeding hopper (6) is narrow at the lower part and wide at the upper part, and the limiting plate (81) and the filter plate (83) are located on the wide part of the feeding hopper (6).

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