Material blockage prevention device and extruder
By designing an anti-material blockage device in the screw extruder, using airflow regulation and negative pressure devices, the material crystallization and blockage problems caused by excessive vacuum are solved, and the stability and smooth discharge of the material are achieved.
Patent Information
- Application Number
- CN202420899063.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-26
AI Technical Summary
When using a screw extruder, due to the excessive vacuum, crystallization occurs in the material, resulting in poor discharge and blocking the discharge port.
A material blockage device is designed, including a material barrel, air flow regulation pipeline, air intake pipeline and air outlet pipeline. By setting up an intake pipe and continuously supplying air to it, the air pressure in the barrel is changed to prevent the material from crystallizing. At the same time, dust or impurities in the airflow regulation pipeline are discharged through the negative pressure device to prevent blockage.
It effectively prevents material crystallization and blockage of the discharge port, ensures moderate air pressure in the barrel, and ensures smooth discharge.
Smart Images
Figure CN222431523U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of material processing, in particular to a material blocking prevention device and an extruder. Background Art
[0002] The screw extruder relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the materials, and then extrude them through the die to form them. Therefore, a series of processes such as mixing, plasticizing and forming can be completed using one extruder for continuous production.
[0003] When using a screw extruder to extrude certain specific materials, crystals appear in the raw materials due to excessive vacuum. The material and crystals at the discharge port are adsorbed on the inner tube wall under the action of vacuum for a long time, gradually accumulating and precipitating, resulting in poor discharge and blockage of the discharge port. Utility Model Content
[0004] The main purpose of the utility model is to provide a material blocking prevention device, aiming to solve the technical problems of poor material discharge and blocking of the material discharge port.
[0005] In order to achieve the above-mentioned purpose, the material blocking prevention device proposed by the utility model comprises:
[0006] A barrel, provided with an inlet and an outlet, wherein the material enters the barrel from the inlet and is discharged from the outlet;
[0007] An airflow regulating pipeline is arranged on the barrel adjacent to the discharge port and is connected with the barrel through an air passage opening on the barrel, and the airflow regulating pipeline is provided with an air inlet and an air outlet;
[0008] An air intake pipeline, one end of which is connected to the air intake of the air flow regulating pipeline, and the other end of which is connected to the air supply device, and the air supply device continuously supplies air to the air intake pipeline;
[0009] An air outlet pipeline has one end connected to the air outlet of the airflow regulating pipeline and the other end connected to the negative pressure device.
[0010] In one embodiment, the air inlet and the air outlet are coaxially arranged and located on the same horizontal line.
[0011] In one embodiment, at least a portion of the air inlet pipeline and at least a portion of the air outlet pipeline are coaxially arranged and located on the same horizontal line.
[0012] In one embodiment, a flow regulating device is provided on the air intake pipeline.
[0013] In one embodiment, a muffler is provided at the air intake end of the air intake pipeline.
[0014] In one embodiment, a negative pressure detection device is provided on the air outlet pipeline.
[0015] In one embodiment, the air outlet pipeline includes a first air outlet pipeline and a second air outlet pipeline, and a volume separator is provided between the airflow regulating pipeline and the negative pressure device, one end of the volume separator is connected to the air outlet of the airflow regulating pipeline through the first air outlet pipeline, and the other end of the volume separator is connected to the negative pressure device through the second air outlet pipeline.
[0016] In one embodiment, the volume separator is provided with a water inlet and a water outlet.
[0017] In one embodiment, a negative pressure detection device is provided on the first air outlet pipeline.
[0018] The utility model also proposes an extruder, comprising a screw, a driving mechanism and the material blocking prevention device as described above, wherein the screw is arranged in the barrel, and the driving mechanism drives the screw to rotate to transport the material from the feed port to the discharge port.
[0019] The material blocking prevention device of the utility model comprises a barrel, an airflow regulating pipeline, an air inlet pipeline and an air outlet pipeline. The barrel is provided with an inlet and an outlet, and the material enters the barrel from the inlet and is sent out from the outlet; the airflow regulating pipeline is arranged on the barrel near the outlet, and is connected with the barrel through an air port provided on the barrel, and the airflow regulating pipeline is provided with an inlet and an outlet; one end of the inlet pipeline is connected with the air inlet of the airflow regulating pipeline, and the other end is connected with an air supply device, and the air supply device continuously supplies air to the inlet pipeline; one end of the outlet pipeline is connected with the air outlet of the airflow regulating pipeline, and the other end is connected with a negative pressure device. By setting up an air inlet pipeline and continuously supplying air to the air inlet pipeline through an air supply device, not only can the air pressure in the barrel be changed to make the vacuum degree moderate to prevent material crystallization and blockage of the discharge port, but also the continuous airflow in the direction of the air inlet pipeline reduces the pressure in the airflow regulating pipeline, thereby making the pressure near the barrel air port and the barrel discharge port relatively large. Furthermore, dust or other impurities near the barrel air port and the barrel discharge port will be sucked back into the airflow regulating pipeline, and then discharged to the outside of the barrel through the negative pressure device connected to the air outlet pipeline, so as to prevent the barrel air port and the barrel discharge port from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0021] Figure 1 This is a schematic structural diagram of an embodiment of the material blocking prevention device of the utility model;
[0022] Figure 2 It is a partial enlarged view of an embodiment of the material blocking prevention device of the utility model.
[0023] Description of Figure Numbers:
[0024] Label name Label name Label name 10 Barrel 11 Feeding port 12 Discharge port 13 Exhaust 20 Air flow regulation line 21 Air Inlet 22 Air outlet 30 Intake pipe 40 Exhaust pipe 41 First outlet pipe 42 Second air outlet line 50 Negative pressure device 60 Flow regulating device 70 Muffler 80 Negative pressure detection device 90 Volume separator 100 Anti-material blocking device 1 Screw 2 Driving mechanism
[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0026] 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 of 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.
[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0030] The screw extruder relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the materials, and then extrude them through the die to form them. Therefore, a series of processes such as mixing, plasticizing and forming can be completed using one extruder for continuous production.
[0031] When using a screw extruder to extrude certain specific materials, crystals appear in the raw materials due to excessive vacuum. The material and crystals at the discharge port are adsorbed on the inner tube wall under the action of vacuum for a long time, gradually accumulating and precipitating, resulting in poor discharge and blockage of the discharge port.
[0032] Based on the above questions, please refer to Figure 1 and Figure 2 As shown, the utility model proposes a material blocking prevention device 100, comprising a barrel 10, an airflow regulating pipeline 20, an air inlet pipeline 30 and an air outlet pipeline 40. The barrel 10 is provided with an inlet 11 and an outlet 12, and the material enters the barrel 10 from the inlet 11 and is sent out from the outlet 12; the airflow regulating pipeline 20 is arranged on the barrel 10 adjacent to the outlet 12, and is connected with the barrel 10 through an air port 13 opened on the barrel 10, and the airflow regulating pipeline 20 is provided with an inlet 21 and an outlet 22; one end of the inlet pipeline 30 is connected with the inlet 21 of the airflow regulating pipeline 20, and the other end is connected with the air supply device, and the air supply device continuously supplies air to the inlet pipeline 30; one end of the outlet pipeline 40 is connected with the outlet 22 of the airflow regulating pipeline 20, and the other end is connected with the negative pressure device 50.
[0033] It is understandable that during the extrusion molding process, impurities such as air, adsorbed moisture, low-boiling plasticizers, and oligomers that can volatilize at the molding temperature are often entrained in the plastic. If these components are not removed, the surface of the product will be dark, and pores, bubbles, spots, etc. will appear on the surface and inside of the product, affecting the appearance of the product and the quality of the product. The role of the negative pressure device 50 is to remove the impurities such as air, adsorbed moisture, low-boiling plasticizers, and oligomers that can volatilize at the molding temperature entrained in the plastic during the extrusion molding process, thereby improving the surface appearance of the product and the quality of the product. The negative pressure device 50 can be a vacuum pump, etc., which is not limited here, as long as it can provide negative pressure. The vacuum pump generally uses fluids such as oil and water as the working medium of the vacuum pump, which plays the role of cooling, sealing, lubrication, etc. in the vacuum pump.
[0034] It can be understood that by setting the air inlet pipeline 30 and continuously supplying air to the air inlet pipeline 30 through the air supply device, not only can the air pressure in the barrel 10 be changed to make the vacuum degree moderate, so as to prevent the material from crystallizing and blocking the discharge port, but also the continuous airflow in the direction of the air inlet pipeline 30 reduces the pressure in the air flow regulating pipeline 20, thereby making the pressure near the air port 13 of the barrel 10 and the discharge port 12 of the barrel 10 relatively large. Further, the dust or other impurities near the air port 13 of the barrel 10 and the discharge port 12 of the barrel 10 will be sucked back into the air flow regulating pipeline 20, and then discharged to the outside of the barrel 10 through the negative pressure device 50 connected to the air outlet pipeline 40, so as to prevent the blockage of the air port 13 of the barrel 10 and the discharge port 12 of the barrel 10. The air supply device can be the outside atmosphere, a blower, etc., which is not limited here, as long as it can realize the supply of air to the air inlet pipeline 30.
[0035] In order to further improve the anti-blocking effect of the discharge port 12, in one embodiment, please refer to Figure 1 and Figure 2 As shown, the air inlet 21 and the air outlet 22 are coaxially arranged and located on the same horizontal line.
[0036] It can be understood that the air inlet 21 and the air outlet 22 are coaxially arranged on the opposite sides of the air flow regulating pipeline 20 and are located on the same horizontal line, so that the air flow from the direction of the air inlet pipeline 30 to the direction of the air outlet pipeline 40 can flow more smoothly, thereby making the pressure difference near the air port 13 of the barrel 10 and the material outlet 12 of the barrel 10 and the pressure in the air flow regulating pipeline 20 large enough. Furthermore, the dust or other impurities near the air port 13 of the barrel 10 and the material outlet 12 of the barrel 10 are more easily sucked back into the air flow regulating pipeline 20, and then discharged to the outside of the barrel 10 through the negative pressure device 50 connected to the air outlet pipeline 40.
[0037] In order to further improve the anti-blocking effect of the discharge port 12, in one embodiment, please refer to Figure 1 and Figure 2As shown, at least a portion of the air inlet pipeline 30 and at least a portion of the air outlet pipeline 40 are coaxially arranged and located on the same horizontal line.
[0038] It can be understood that by arranging at least part of the air inlet pipe 30 and at least part of the air outlet pipe 40 coaxially and on the same horizontal line, the air flow from the direction of the air inlet pipe 30 to the direction of the air outlet pipe 40 can be smoother, thereby making the pressure difference near the air port 13 of the barrel 10 and the material outlet 12 of the barrel 10 and the pressure in the airflow regulating pipe 20 large enough. Furthermore, the dust or other impurities near the air port 13 of the barrel 10 and the material outlet 12 of the barrel 10 can be more easily sucked back into the airflow regulating pipe 20, and then discharged to the outside of the barrel 10 through the negative pressure device 50 connected to the air outlet pipe 40.
[0039] In order to better adjust the gas supply of the gas supply device, in one embodiment, please refer to Figure 1 and Figure 2 As shown, a flow regulating device 60 is provided on the air intake pipeline 30 .
[0040] It can be understood that the flow regulating device 60 can be a flow regulating valve, a flow meter, etc., which is not limited here, as long as it can adjust the gas supply volume of the gas supply device.
[0041] In order to reduce the noise of the air supply device continuously supplying air to the air intake pipe 30, in one embodiment, please refer to Figure 1 and Figure 2 As shown, a muffler 70 is provided at the intake end of the intake pipe 30 .
[0042] It can be understood that the structure of the muffler 70 may include a shell, a sound insulation layer, a sound absorbing board, an inlet end and an outlet end, both of which are arranged on the shell, and a sound insulation layer is arranged on the inner wall of the shell, and the sound insulation layer may be any one of sound insulation cotton, sound insulation felt, etc.; the shell is divided into a zigzag channel by a plurality of sound absorbing boards, one end of the zigzag channel is connected to the inlet end, and the other end is connected to the outlet end, and the sound absorbing board may be any one of groove wood sound absorbing board, hole wood sound absorbing board, cloth soft bag sound absorbing board, polyester fiber sound absorbing board, metal sound absorbing board, etc. Of course, the structure of the muffler 70 may also be other structures, which are not limited here, as long as it can achieve the effect of muffler.
[0043] In order to better detect the vacuum degree in the barrel 10, to prevent the vacuum from being too low, causing crystallization in the raw material, resulting in poor discharge and blocking the discharge port. Figure 1 and Figure 2 As shown, a negative pressure detection device 80 is provided on the air outlet pipeline 40 .
[0044] It is understandable that the negative pressure detection device 80 can be a negative pressure gauge, a vacuum detector, etc., which is not limited here, as long as it can detect the vacuum degree in the barrel 10.
[0045] In order to further improve the stability of product quality. In one embodiment, please refer to Figure 1 The air outlet pipeline 40 includes a first air outlet pipeline 41 and a second air outlet pipeline 42. A volume separator 90 is provided between the airflow regulating pipeline 20 and the negative pressure device 50. One end of the volume separator 90 is connected to the air outlet 22 of the airflow regulating pipeline 20 through the first air outlet pipeline 41, and the other end of the volume separator 90 is connected to the negative pressure device 50 through the second air outlet pipeline 42.
[0046] It is understandable that vacuum pumps generally use fluids such as oil and water as the working medium of the vacuum pump, which plays the role of cooling, sealing, lubrication, etc. in the vacuum pump. The working medium of the vacuum pump will flow back and pollute the barrel 10. The impurities extracted during the production process will cause the medium in the vacuum pump to seriously deteriorate, resulting in poor vacuuming and affecting the quality of the product. By arranging a volume separator 90 between the airflow regulating pipeline 20 and the negative pressure device 50, on the one hand, it can absorb the impurities sucked out from the barrel 10, including entrained air, adsorbed moisture, low-boiling plasticizers, and oligomers that can volatilize at the molding temperature, and on the other hand, it can avoid the medium in the negative pressure device 50 from flowing back, thereby ensuring that the quality of the product is more stable.
[0047] In order to further improve the clean separation purpose of the volume separator 90, in one embodiment, please refer to Figure 1 The volume separator 90 is provided with a water inlet and a water outlet.
[0048] It can be understood that the volume separator 90 is filled with water, and a water inlet and a water outlet are provided on the side wall. By regularly discharging the water in the volume separator 90, the purpose of cleaning the volume separator can be achieved without causing scaling, and the equipment is easy to maintain.
[0049] In order to better detect the vacuum degree in the barrel 10, to prevent the vacuum from being too low, causing crystallization in the raw material, resulting in poor discharge and blocking the discharge port. Figure 1 As shown, a negative pressure detection device 80 is provided on the first air outlet pipeline 41 .
[0050] The utility model also proposes an extruder, including a screw 1, a driving mechanism 2 and a material blocking prevention device 100. The specific structure of the material blocking prevention device 100 refers to the above embodiment. Since the extruder adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the screw 1 is arranged in the barrel 10, and the driving mechanism 2 drives the screw 1 to rotate to transport the material from the feed port 11 to the discharge port 12.
[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A material blocking prevention device (100), characterized in that: include: A barrel (10) is provided with an inlet (11) and an outlet (12), wherein the material enters the barrel (10) from the inlet (11) and is discharged from the outlet (12); an air flow regulating pipeline (20) disposed on the barrel (10) adjacent to the discharge port (12) and connected to the barrel (10) via an air passage (13) provided on the barrel (10), wherein the air flow regulating pipeline (20) is provided with an air inlet (21) and an air outlet (22); An air intake pipeline (30), one end of which is connected to the air intake port (21) of the air flow regulating pipeline (20), and the other end of which is connected to the air supply device, and the air supply device continuously supplies air to the air intake pipeline (30); An air outlet pipeline (40) is connected to the air outlet (22) of the airflow regulating pipeline (20) at one end and connected to the negative pressure device (50) at the other end.
2. The material blocking prevention device (100) according to claim 1, characterized in that: The air inlet (21) and the air outlet (22) are coaxially arranged and located on the same horizontal line.
3. The material blocking prevention device (100) according to claim 1, characterized in that: At least a portion of the air inlet pipeline (30) and at least a portion of the air outlet pipeline (40) are coaxially arranged and located on the same horizontal line.
4. The material blocking prevention device (100) according to claim 1, characterized in that: The air intake pipeline (30) is provided with a flow regulating device (60).
5. The material blocking prevention device (100) according to claim 1, characterized in that: A silencer (70) is provided at the air intake end of the air intake pipeline (30).
6. The material blocking prevention device (100) according to claim 1, characterized in that: The air outlet pipeline (40) is provided with a negative pressure detection device (80).
7. The material blocking prevention device (100) according to claim 1, characterized in that: The air outlet pipeline (40) comprises a first air outlet pipeline (41) and a second air outlet pipeline (42); a volume separator (90) is provided between the airflow regulating pipeline (20) and the negative pressure device (50); one end of the volume separator (90) is connected to the air outlet (22) of the airflow regulating pipeline (20) through the first air outlet pipeline (41); and the other end of the volume separator (90) is connected to the negative pressure device (50) through the second air outlet pipeline (42).
8. The material blocking prevention device (100) according to claim 7, characterized in that: The volume separator (90) is provided with a water inlet and a water outlet.
9. The material blocking prevention device (100) according to claim 7, characterized in that: The first air outlet pipeline (41) is provided with a negative pressure detection device (80).
10. An extruder, characterized in that: include: A screw (1), a driving mechanism (2), and an anti-material clogging device (100) as claimed in any one of claims 1 to 9, wherein the screw (1) is arranged in the barrel (10), and the driving mechanism (2) drives the screw (1) to rotate to transport the material from the inlet (11) to the outlet (12).