Three-screw extrusion molding system

Abstract

The utility model discloses a three-screw extrusion molding system and relates to the technical field of plastic processing. The device comprises a three-screw extrusion mechanism used for receiving a mixed particle material and extruding a mixed melt; the feeding mechanism is used for feeding mixed granules into the three-screw extrusion mechanism; the cooling forming mechanism is used for cooling the melt extruded in the three-screw extrusion mechanism by utilizing air cooling; the feeding mechanism comprises a cold mixing machine, and the discharging end of the cold mixing machine is communicated with the feeding end of the three-screw extrusion mechanism through a cold pipe mechanism; the three-screw extrusion device solves the problem that a feeding port of a feeding end of an existing three-screw extrusion device is prone to being blocked due to the fact that the processing temperature is too high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic processing, specifically is a three screw rod extrusion forming system. BACKGROUND

[0002] Three screw rod extruders are a kind of efficient plastic processing equipment, and its working principle is that plastic particles are heated and melted by three mutually rotating screws, and are mixed and propelled by the helical groove between the screw, and finally are formed by die.The equipment has the characteristics of high efficiency, stability and reliability, and is widely used in the fields of plastics, rubber, chemical industry, food and medicine.

[0003] Three screw rod extruders have higher dispersibility and yield than double screw rod extruders, and the free volume is increased by 40% than double screw rod, which can better improve the mixing effect of material.In addition, three screw rod extruders also have the characteristics of strong conveying capacity, self-cleaning ability and energy saving, and are suitable for processing of high viscosity and high filling amount materials.

[0004] And the high efficiency and large capacity bring the demand that the temperature of shear screw section is generally higher.When the temperature of shear screw section is higher, a large amount of heat is easily transferred to the position of the feeding port, so that the material particles are easily deformed in viscosity during the discharging process, and the material particles are adhered to the feeding port after the equipment is operated for a long time, causing the material to be not smooth. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a three screw rod extrusion forming system to solve the problem that the feeding end of the existing three screw rod extrusion device is easily blocked due to too high processing temperature.

[0006] In order to solve the above problems, the utility model adopts the following technical means:

[0007] A three screw rod extrusion forming system, comprising:

[0008] Three screw rod extrusion mechanism for receiving mixed granular material and extruding mixed melt;

[0009] Feeding mechanism for feeding mixed granular material to the three screw rod extrusion mechanism;

[0010] Cooling forming mechanism for cooling the melt extruded by the three screw rod extrusion mechanism by air cooling;

[0011] The feeding mechanism comprises a cold mixer, and the discharge end of the cold mixer is communicated with the feeding end of the three screw rod extrusion mechanism through a cold pipe mechanism.

[0012] Preferably, the cold pipe mechanism comprises a downward pipe communicated with the discharge end of the cold mixer, a vertical pipe communicated with the bottom end of the downward pipe, and a feeding end of the three-screw extrusion mechanism communicated with the bottom end of the vertical pipe.

[0013] Further, the first water inlet pipe is communicated with the bottom surface of the first water cooling box on the side of the three-screw extrusion mechanism, and the first water outlet pipe is communicated with the top surface of the first water cooling box on the side away from the three-screw extrusion mechanism.

[0014] The second water inlet pipe is communicated with the bottom surface of the second water cooling box, and the second water outlet pipe is communicated with the top surface of the second water cooling box.

[0015] Further, the downward pipe and the vertical pipe are communicated through an arc-shaped pipe, the arc-shaped pipe is arranged between the first water cooling box and the second water cooling box, the first water cooling box and the second water cooling box are arranged in a spaced manner, the inner arc side outer wall of the arc-shaped pipe is in abutment with a striking end of a vibration striking device, the bottom end of the vertical pipe is communicated with the feeding end of the three-screw extrusion mechanism through a first rubber hose, and the top end of the downward pipe is communicated with the discharge end of the cold mixer through a second rubber hose.

[0016] Further, the vibration striking device comprises a linear reciprocating motor, a connecting rod is arranged at the reciprocating end of the linear reciprocating motor, the connecting rod extends from between the first water cooling box and the second water cooling box to the inner arc side of the arc-shaped pipe, an arc-shaped plate serving as the striking end is arranged at the end of the connecting rod, the outer arc surface of the arc-shaped plate is in abutment with the inner arc surface of the arc-shaped pipe, and the connecting rod is connected with the inner arc surface of the arc-shaped plate.

[0017] Further, a support plate is arranged between the outer walls of the first water cooling box and the second water cooling box, the two ends of the support plate are flexibly connected with the outer walls of the first water cooling box and the second water cooling box respectively, a through hole is arranged on the support plate, the connecting rod is slidably arranged through the through hole, and the through hole is in clearance fit with the connecting rod.

[0018] In the process of use, the utility model has the following beneficial effects:

[0019] In the extrusion processing, the mixed granular material enters into the three-screw extrusion mechanism through the feeding mechanism, is extruded from the die of the three-screw extruder through the blending and shearing of the three-screw extrusion mechanism, and then is air-cooled by the cooling forming mechanism. In the process that the material enters into the three-screw extrusion mechanism from the feeding mechanism, the material is processed in the cold mixer, enters into the three-screw extrusion mechanism through the cold pipe mechanism, and the cold pipe mechanism can keep the temperature low at any time through the specific structure, avoid the heat transferred from the three-screw extrusion mechanism to the cold pipe mechanism from affecting the passing granular material, avoid the viscoelasticity change of the material and the adhesion of the granular material to the connecting port position of the cold pipe mechanism and the three-screw extrusion mechanism, and avoid the feeding blockage. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model.

[0021] Figure 2 It is a structural schematic view of the cold pipe mechanism of the utility model.

[0022] 1-three-screw extrusion mechanism, 2-feeding mechanism, 3-cooling forming mechanism, 4-cold mixer, 5-cold pipe mechanism, 6-inclined pipe, 7-vertical pipe, 8-first water-cooled box, 9-second water-cooled box, 10-first water inlet pipe, 11-first water outlet pipe, 12-second water inlet pipe, 13-second water outlet pipe, 14-arc-shaped pipe, 15-vibration and beating device, 16-first rubber hose, 17-second rubber hose, 18-linear reciprocating motor, 19-connecting rod, 20-arc-shaped plate, 21-supporting plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that similar reference numerals and letters refer to similar items throughout the accompanying drawings, and therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0027] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship commonly placed when the utility model product is used, or is the orientation or position relationship commonly understood by those skilled in the art, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0028] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] Please refer to Figure 1 and Figure 2 It is shown that a three-screw extrusion molding system comprises:

[0030] The three-screw extrusion mechanism 1 is used for receiving mixed granular materials and extruding mixed melts;

[0031] The feeding mechanism 2 is used for feeding mixed granular materials to the three-screw extrusion mechanism 1;

[0032] The cooling molding mechanism 3 cools the melt extruded in the three-screw extrusion mechanism 1 by air cooling;

[0033] The feeding mechanism 2 comprises a cold mixer 4, and the discharge end of the cold mixer 4 is communicated with the feeding end of the three-screw extrusion mechanism 1 through a cold pipe mechanism 5.

[0034] Thus, the cold pipe mechanism 5 comprises a downward pipe 6 communicated with the discharge end of the cold mixer 4, the bottom end of the downward pipe 6 is communicated with a vertical pipe 7, the bottom end of the vertical pipe 7 is communicated with the feeding end of the three-screw extrusion mechanism 1, the outer wall of the downward pipe 6 and the vertical pipe 7 is respectively surrounded by a first water-cooled box 8 and a second water-cooled box 9, the first water-cooled box 8 is communicated with a first water inlet pipe 10 and a first water outlet pipe 11, the second water-cooled box 9 is communicated with a second water inlet pipe 12 and a second water outlet pipe 13.

[0035] Further, the length of the cold pipe mechanism 5 is increased by the downward pipe 6, and the distance between the cold mixer 4 and the three-screw extrusion mechanism 1 is avoided to be too far. The vertical pipe 7 is arranged to facilitate the particle material to enter the three-screw extrusion mechanism 1 without obstruction. The first water-cooled box 8 and the second water-cooled box 9 are arranged to cool the vertical pipe 7 and the downward pipe 6 respectively by blowing cooling liquid from the first water inlet pipe 10 and the second water inlet pipe 12 respectively, so that the particle material is effectively prevented from adhering to the vertical pipe 7 due to viscoelastic deformation caused by heat transfer from the three-screw extrusion mechanism 1 to the feeding pipe during long-time operation.

[0036] Further, in order to ensure the cooling effect of the first water-cooled box 8 and the second water-cooled box 9 on the vertical pipe 7 and the downward pipe 6 respectively, the first water inlet pipe 10 is communicated with the bottom surface of the first water-cooled box 8 on the side facing the three-screw extrusion mechanism 1, and the first water outlet pipe 11 is communicated with the top surface of the first water-cooled box 8 on the side away from the three-screw extrusion mechanism 1.

[0037] The second water inlet pipe 12 is communicated with the bottom surface of the second water-cooled box 9, and the second water outlet pipe 13 is communicated with the top surface of the second water-cooled box 9.

[0038] Further, the downward pipe 6 and the vertical pipe 7 are communicated through an arc-shaped pipe 14, the arc-shaped pipe 14 is arranged between the first water-cooled box 8 and the second water-cooled box 9, the first water-cooled box 8 and the second water-cooled box 9 are arranged in a spaced manner, the inner arc side outer wall of the arc-shaped pipe 14 is in abutment with the striking end of a vibration striking device 15, the bottom end of the vertical pipe 7 is communicated with the feeding end of the three-screw extrusion mechanism 1 through a first rubber hose 16, and the top end of the downward pipe 6 is communicated with the discharge end of the cold mixer 4 through a second rubber hose 17.

[0039] In this way, not only can the granular material conveniently enter the vertical pipe 7 from the downward pipe 6 through the arc-shaped pipe 14, but also the whole pipeline can be vibrated at any time by the vibration mechanism device, so that the granular material can be conveniently discharged and the granular material can be prevented from being blocked, and in the vibration process, the cooling liquid in the first water cooling tank 8 and the second water cooling tank 9 can also be splashed due to the vibration, so that the cooling liquid can be more quickly and better heat exchanged, and the first water cooling tank 8 and the second water cooling tank 9 can provide cooling effects on the downward pipe 6 and the vertical pipe 7, respectively, and further prevent the downward pipe 6 and the vertical pipe 7 from being blocked.

[0040] More specifically, for the vibration hitting device 15, the vibration hitting device 15 comprises a linear reciprocating motor 18, a connecting rod 19 is arranged at a reciprocating end of the linear reciprocating motor 18, the connecting rod 19 extends from between the first water cooling tank 8 and the second water cooling tank 9 to an inner arc side of the arc-shaped pipe 14, an arc-shaped plate 20 as a hitting end is arranged at an end of the connecting rod 19, an outer arc surface of the arc-shaped plate 20 abuts against an inner arc surface of the arc-shaped pipe 14, and the connecting rod 19 is connected with the inner arc surface of the arc-shaped plate 20.

[0041] Further, in order to improve the stability of the connecting rod 19 in the running process, a support plate 21 is arranged between the outer walls of the first water cooling tank 8 and the second water cooling tank 9, both ends of the support plate 21 are flexibly connected with the outer walls of the first water cooling tank 8 and the second water cooling tank 9, respectively, a through hole is arranged on the support plate 21, the connecting rod 19 slides through the through hole, and the through hole and the connecting rod 19 are in clearance fit.

[0042] In this way, the connecting rod 19 passes through the through hole to avoid the connecting rod 19 from shaking greatly in the linear motion direction, so as to improve the stability of the connecting rod 19 in the running process.

[0043] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A triple screw extrusion molding system characterized by, The utility model relates to a kind of three-screw extrusion mechanism (1) for receiving mixed granular material and extruding mixed melt;Feeding mechanism (2) is used to put mixed granular material to the three-screw extrusion mechanism (1);Cooling forming mechanism (3) is cooled using air cooling to the melt extruded in the three-screw extrusion mechanism (1);The feeding mechanism (2) includes cold mixer (4), and the discharge end of the cold mixer (4) is communicated with the feeding end of the three-screw extrusion mechanism (1) by cold pipe mechanism (5). The cold pipe mechanism (5) includes the downward tube (6) communicated with the discharge end of the cold mixer (4), the bottom end of the downward tube (6) is communicated with the vertical tube (7), the bottom end of the vertical tube (7) is communicated with the feeding end of the three-screw extrusion mechanism (1), the outer wall of the downward tube (6) and the vertical tube (7) is respectively surrounded by the first water-cooled box (8) and the second water-cooled box (9), the first water-cooled box (8) is communicated with the first water inlet pipe (10) and the first water outlet pipe (11) on, the second water-cooled box (9) is communicated with the second water inlet pipe (12) and the second water outlet pipe (13) on. The first water inlet pipe (10) is communicated on the bottom surface of the first water-cooled box (8) towards the three-screw extrusion mechanism (1) side, and the first water outlet pipe (11) is communicated on the top surface of the first water-cooled box (8) away from the three-screw extrusion mechanism (1) side; The second water inlet pipe (12) is communicated on the bottom surface of the second water-cooled box (9), and the second water outlet pipe (13) is communicated on the top surface of the second water-cooled box (9). The downward tube (6) and the vertical tube (7) are communicated by the arc tube (14), the arc tube (14) is arranged between the first water-cooled box (8) and the second water-cooled box (9), the first water-cooled box (8) and the second water-cooled box (9) are arranged at intervals, the inner arc side outer wall of the arc tube (14) is in abutment with the hitting end of the vibration hitting device (15), the bottom end of the vertical tube (7) is communicated with the feeding end of the three-screw extrusion mechanism (1) by the first rubber hose (16), and the top end of the downward tube (6) is communicated with the discharge end of the cold mixer (4) by the second rubber hose (17).

2. A triple screw extrusion system according to claim 1, characterized in that The vibration hitting device (15) includes a linear reciprocating motor (18), the reciprocating end of the linear reciprocating motor (18) is configured with a connecting rod (19), the connecting rod (19) extends from between the first water-cooled box (8) and the second water-cooled box (9) to the inner arc side of the arc tube (14), the end of the connecting rod (19) is provided with the arc plate (20) as the hitting end, the outer arc surface of the arc plate (20) is in abutment with the inner arc surface of the arc tube (14), and the connecting rod (19) is connected with the inner arc surface of the arc plate (20).

3. A triple screw extrusion system according to claim 2, wherein ​ ​ 4. A triple screw extrusion system according to claim 3, wherein ​ 5. A triple screw extrusion system according to claim 4, wherein ​ 6. A triple screw extrusion system according to claim 5, wherein Support plates (21) are arranged between the outer walls of the first water-cooled box (8) and the second water-cooled box (9), the two ends of the support plates (21) are respectively flexibly connected with the outer walls of the first water-cooled box (8) and the second water-cooled box (9), through holes are arranged on the support plates (21), the connecting rods (19) slide through the through holes, and the through holes are in clearance fit with the connecting rods (19).

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