Extruder capable of preventing vacuum flash

Abstract

The utility model relates to an extruder capable of preventing vacuum overflow. The extruder comprises an extrusion assembly, an anti-overflow assembly, a vacuumizing assembly and a solid accommodating chamber, the extruding assembly comprises an extruding machine barrel and an extruding screw rod, and the extruding screw rod movably penetrates through the extruding machine barrel; the anti-overflow assembly comprises an anti-overflow machine barrel and an anti-overflow screw rod, the anti-overflow machine barrel is communicated with the extruder barrel, the anti-overflow screw rod movably penetrates through the anti-overflow machine barrel to be inserted into the extruder barrel, and the anti-overflow screw rod comprises a left-handed first thread element, a right-handed second thread element and a left-handed third thread element; the first thread element, the second thread element and the third thread element are sequentially arranged in the direction away from the extruder barrel, the relationship between the thread pitch p1 of the first thread element and the thread pitch p2 of the second thread element is as follows: 1.5 p1 < = p2 < = 3p1, and the relationship between the thread pitch p1 of the first thread element and the thread pitch p3 of the third thread element is as follows: 0.5 p1 < = p3 < = p1; the vacuumizing assembly comprises a vacuum chamber, and the vacuum chamber is communicated with the anti-overflow machine barrel; and the solid accommodating chamber is communicated with the anti-overflow machine barrel and is opposite to the vacuum chamber. Compared with the prior art, materials overflowing from the extruder barrel are sent back into the extruder barrel through the rotation of the anti-overflow screw rod, and even if excessive materials overflowing from the extruder barrel enter the anti-overflow barrel, the materials can enter the solid accommodating chamber along with the anti-overflow screw rod, so that the cooled and deteriorated materials are prevented from entering the extruder barrel again to pollute the materials.

Description

Technical Field

[0001] The utility model relates to an extruder, in particular to an extruder capable of preventing vacuum overflow. Background Art

[0002] When processing polymer materials, especially in the process of extruding plastics, water vapor, small molecules, degradation substances and volatiles in polymer materials will produce low-boiling substances at higher processing temperatures. Low-boiling substances remaining in plastics will affect the mechanical properties, thermal properties, aging resistance, color and appearance of the products. In order to ensure the normal operation of the extrusion equipment and ensure that the extrusion meets the requirements of the plastic, the low-boiling substances need to be extracted. If the low-boiling substances cannot be extracted in time, they will accumulate at the vacuum gland mouth. If they are not cleaned for a long time, they will cause the strips to break and seriously affect the product quality.

[0003] In the prior art, low-boiling substances in the melt are generally extracted in time by a vacuum device. During the extrusion production process, the phenomenon that molten polymer materials are easily accumulated and overflowed at the vacuum exhaust port due to various factors is called vacuum return material, also known as vacuum bubbling, vacuum return water, etc. After the vacuum return material overflows, it accumulates in the closed vacuum chamber and cannot be observed and removed in time. In severe cases, it even enters the vacuum exhaust pipeline, blocks the pipeline after solidification, and the vacuum effect cannot be exerted. In addition, the low-boiling substances condensed into liquids in the vacuum chamber and pipelines, and the materials that stay in the vacuum chamber for a long time and turn yellow, black or even carbonized will flow down into the extruder and gradually be brought into the product, causing product discoloration, black spots and other quality problems, resulting in significant production losses. Although the production can continue after regular or irregular shutdown and cleaning, the failure to detect vacuum return material in time will bring product quality risks, such as black spot defects when producing white materials, and severe return material will cause product broken strips; at the same time, shutdown and cleaning greatly increases the labor intensity of employees, reduces work efficiency, and increases product manufacturing costs. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide an extruder for preventing vacuum overflow, so as to prevent materials from entering the vacuum chamber.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] An extruder for preventing vacuum overflow, comprising:

[0007] An extrusion assembly, the extrusion assembly comprising an extrusion barrel and an extrusion screw, the extrusion screw being movably disposed in the extrusion barrel;

[0008] An anti-overflow component, the anti-overflow component includes an anti-overflow barrel and an anti-overflow screw, the anti-overflow barrel is connected to the extruder barrel, the anti-overflow screw moves through the anti-overflow barrel and is inserted into the extruder barrel, the anti-overflow screw includes a left-handed first threaded element, a right-handed second threaded element and a left-handed third threaded element, the first threaded element, the second threaded element and the third threaded element are arranged in sequence in a direction away from the extruder barrel, the relationship between the pitch p1 of the first threaded element and the pitch p2 of the second threaded element is as follows: 1.5p1≤p2≤3p1, the relationship between the pitch p1 of the first threaded element and the pitch p3 of the third threaded element is as follows: 0.5p1≤p3≤p1;

[0009] A vacuum pumping assembly, the vacuum pumping assembly comprising a vacuum chamber, the vacuum chamber being in communication with the overflow prevention barrel;

[0010] A solid containing chamber is communicated with the anti-overflow barrel and is arranged opposite to the vacuum chamber.

[0011] In one embodiment, the first threaded element, the second threaded element and the third threaded element are all double-start threads.

[0012] In one embodiment, the communication port between the anti-overflow barrel and the vacuum chamber is arranged at the connection between the second threaded element and the third threaded element.

[0013] In one of the embodiments, the anti-overflow screw includes an axial core and a plurality of transition rings, the plurality of threaded elements are sequentially sleeved on the axial core along the axial direction, and the transition rings are respectively arranged between two adjacent threaded elements.

[0014] In one embodiment, the extruder includes an anti-overflow drive and a bearing cover, the bearing cover is connected to the anti-overflow barrel, the shaft core passes through the bearing cover and is transmission-connected to the anti-overflow drive, and a sealing gasket is provided between the bearing cover and the shaft core.

[0015] In one embodiment, the vacuum pump assembly includes a vacuum pump and a pressure gauge, a filter screen is provided on the side wall of the vacuum chamber, and the vacuum pump and the pressure gauge are respectively connected to the side wall of the vacuum chamber.

[0016] In one of the embodiments, a discharge port is provided at the bottom of the solid holding chamber, and a visual window is provided on the side wall of the solid holding chamber.

[0017] In one embodiment, the extruder includes a support frame, the top of the support frame is connected to the anti-overflow barrel, and the bottom of the support frame is provided with a rolling pulley.

[0018] In one embodiment, a connecting seat is provided between the anti-overflow barrel and the extruder barrel, one end of the connecting seat is connected to the end of the anti-overflow barrel, and the other end of the connecting seat is inserted into the side wall of the extruder barrel. A material channel is provided in the connecting seat, connecting the screw cavity of the anti-overflow barrel and the screw cavity of the extruder barrel, and the third threaded element is inserted into the connecting seat.

[0019] In one embodiment, the side wall of the overflow prevention barrel is provided with a heating element and a thermocouple.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] 1. In the above-mentioned extruder, the extrusion component is used to extrude molten materials to manufacture products. During the extrusion production process, the vacuum component is used to extract the water volatiles and water vapor generated by the molten materials. In order to prevent the vacuum suction from sucking the materials in the extruder barrel into the vacuum chamber, an anti-overflow component is arranged between the vacuum chamber and the extruder barrel, and a solid holding chamber is arranged opposite to the vacuum chamber. The first threaded element can transport the material in the direction close to the extruder barrel, forming a positive thrust to prevent the material in the extruder barrel from entering the anti-overflow barrel; if too much material overflows and overflows the first threaded element, the second threaded element in the opposite direction forms a thrust away from the extruder barrel, transporting the material in the direction away from the extruder barrel, effectively preventing this part of the material from entering the extruder barrel again; further, if the material flow The material enters the third threaded element, and the third threaded element transports the material toward the direction close to the second threaded element. Different pitches are further set, so that the extrusion speeds of the first threaded element, the second threaded element and the third threaded element are different, that is, the extrusion speed of the first threaded element is greater than the extrusion speed of the second threaded element, and the extrusion speed of the third threaded element is greater than the extrusion speed of the first threaded element. Therefore, when the material is in the first threaded element, the material can be accelerated back to the extruder barrel. When the material is in the second threaded element, the extrusion speed slows down, thereby increasing the residence time of the material in the second threaded element and ensuring that the material falls into the solid holding chamber. When the material is in the third threaded element, the extrusion speed speeds up, which is conducive to accelerating the squeezing of the material back to the second threaded element and preventing the material from flowing out of the anti-overflow barrel through the third threaded element.

[0022] 2. Since the thread directions of two adjacent threaded elements are different, the transition ring is used to separate the two adjacent threaded elements to ensure a smooth transition of the thread end faces between the threaded elements.

[0023] 3. The bearing gland is used to fix the axial position of the shaft core so that the shaft core can only rotate relative to the overflow prevention barrel 21. The sealing gasket is used to prevent the material from flowing out of the overflow prevention barrel, thereby further improving the sealing performance of the overflow prevention barrel.

[0024] 4. The filter is used to filter solid impurities and prevent fixed materials from entering the vacuum pump and pressure gauge, effectively protecting the vacuum pump and pressure gauge.

[0025] 5. In order to prevent the material in the anti-overflow barrel from cooling and solidifying prematurely and blocking the anti-overflow screw, a heating element is provided on the side wall of the anti-overflow barrel to heat the material in the anti-overflow barrel. At the same time, a thermocouple is provided to facilitate the detection and control of the temperature in the anti-overflow barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the extruder in the utility model.

[0027] Figure 2 It is a cross-sectional view of the extruder in the utility model.

[0028] Figure 3 It is a top view of the extruder in the utility model.

[0029] Figure 4 It is a partial cross-sectional view of the extruder in the utility model.

[0030] : 100, extruder; 10, extrusion assembly; 11, extruder barrel; 20, anti-overflow assembly; 21, anti-overflow barrel; 22, anti-overflow screw; 221, first threaded element; 222, second threaded element; 223, third threaded element; 224, shaft core; 225, transition ring; 23, anti-overflow drive member; 24, bearing cover; 25, sealing gasket; 26, connecting seat; 27, thermocouple; 28, reduction gear box; 30, vacuum assembly; 31, vacuum chamber; 32, pressure gauge; 33, filter screen; 34, pipeline valve; 35, vacuum visual window; 40, solid holding chamber; 41, discharge port; 50, support frame; 51, rolling pulley. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0032] An extruder 100 for preventing vacuum overflow will be described in detail below with reference to the accompanying drawings.

[0033] like Figures 1 to 4 As shown, in one embodiment, an extruder 100 for preventing vacuum overflow is provided, including an extrusion component 10, an overflow prevention component 20, a vacuum assembly 30 and a solid receiving chamber 40.

[0034] The extrusion assembly 10 includes an extruder barrel 11 and an extrusion screw, which is movably inserted into the extruder barrel 11; the overflow prevention assembly 20 includes an overflow prevention barrel 21 and an overflow prevention screw 22, which is connected to the extruder barrel 11, and the overflow prevention screw 22 is movably inserted into the extruder barrel 11 through the overflow prevention barrel 21; the vacuum assembly 30 includes a vacuum chamber 31, which is connected to the overflow prevention barrel 21; the solid holding chamber 40 is connected to the overflow prevention barrel 21 and is arranged opposite to the vacuum chamber 31.

[0035] The above-mentioned extruder 100 and the extrusion component 10 are used to extrude molten materials to manufacture products. During the extrusion production process, the vacuum assembly 30 is used to extract the water volatiles and water vapor generated by the molten materials. In order to prevent the vacuum suction from sucking the material in the extruder barrel 11 into the vacuum chamber 31, an overflow prevention assembly 20 is arranged between the vacuum chamber 31 and the extruder barrel 11, and a solid holding chamber 40 is arranged opposite the vacuum chamber 31. The material overflowing from the extruder barrel 11 is sent back to the extruder barrel 11 by the rotation of the overflow prevention screw 22. Even if too much material overflows from the extruder barrel 11 and enters the overflow prevention barrel 21, the material will enter the solid holding chamber 40 along with the overflow prevention screw 22, thereby preventing the cooled and deteriorated material from entering the extruder barrel 11 again and contaminating the material. Therefore, the overflow prevention assembly 20 effectively prevents the vacuum suction from causing the extruder barrel 11 to overflow, and can effectively prevent the material from flowing back after the overflow, thereby ensuring the product quality.

[0036] Among them, Figure 2 As shown, a connecting seat 26 is provided between the anti-overflow barrel 21 and the extruder barrel 11, one end of the connecting seat 26 is connected to the end of the anti-overflow barrel 21, and the other end of the connecting seat 26 is inserted into the side wall of the extruder barrel 11. A material channel is provided in the connecting seat 26, connecting the screw cavity of the anti-overflow barrel 21 with the screw cavity of the extruder barrel 11, and the third threaded element 223 is inserted into the connecting seat 26.

[0037] In order to prevent the material in the anti-overflow barrel 21 from cooling and solidifying prematurely and blocking the anti-overflow screw 22, the side wall of the anti-overflow barrel 21 is provided with a heating element and a thermocouple 27 for heating the material in the anti-overflow barrel 21 and detecting and controlling the temperature in the anti-overflow barrel 21.

[0038] Specifically, Figure 4 As shown, in one embodiment, the anti-overflow screw 22 includes a plurality of different threaded elements arranged along the axial direction thereof.

[0039] Further, in one embodiment, the threaded element includes a first threaded element 221, a second threaded element 222 and a third threaded element 223 which are sequentially away from the extrusion screw, the first threaded element 221 is provided with a forward thread, the second threaded element 222 is provided with a reverse thread, and the third threaded element 223 is provided with a forward thread.

[0040] The anti-overflow screw 22 is provided with a plurality of different threaded elements, in particular, a first forward threaded element 221, a second reverse threaded element 222 and a third forward threaded element 223. Since the first threaded element 221 is close to the extruder barrel 11, if the material of the extruder barrel 11 overflows, the first threaded element 221 can transport the material in a direction close to the extruder barrel 11, forming a forward thrust to prevent the material in the extruder barrel 11 from entering the anti-overflow barrel 21; if too much material overflows and overflows the first threaded element 221, the second reverse threaded element 222 forms a thrust away from the extruder barrel 11, transporting the material in a direction away from the extruder barrel 11, effectively preventing this part of the material from entering the extruder barrel 11 again; further, if the material flows into the third threaded element 223, the third threaded element 223 transports the material in a direction close to the second threaded element 222, preventing the material from flowing out of the anti-overflow barrel 21 and damaging the anti-overflow drive 23.

[0041] Among them, the relationship between the pitch p1 of the first threaded element 221 and the pitch p2 of the second threaded element 222 is as follows: 1.5p1≤p2≤3p1, and the relationship between the pitch p1 of the first threaded element 221 and the pitch p3 of the third threaded element 223 is as follows: 0.5p1≤p3≤p1. The anti-overflow screw 22 sets different pitches so that the extrusion speeds of the first threaded element 221, the second threaded element 222 and the third threaded element 223 are different, that is, the extrusion speed of the first threaded element 221 is greater than the extrusion speed of the second threaded element 222, and the extrusion speed of the third threaded element 223 is greater than the extrusion speed of the first threaded element 221. When the material is in the first threaded element, the material can be accelerated back to the extruder barrel. When the material is in the second threaded element, the extrusion speed slows down, increasing the residence time of the material in the second threaded element and ensuring that the material falls into the solid holding chamber. When the material is in the third threaded element, the extrusion speed increases, which is conducive to accelerating the extrusion of the material back to the second threaded element and preventing the material from flowing out of the anti-overflow barrel through the third threaded element.

[0042] In this specific embodiment, the pitch p1 of the first thread element 221 and the pitch p3 of the third thread element 223 are both 28 mm, and the pitch p2 of the second thread element 222 is 56 mm.

[0043] The lead of the first threaded element 221 is 37.5mm, the length is 56.25mm, it is a double-start left-handed thread, and it is a Cr12MoV threaded element; the lead of the second threaded element 222 is 75mm, the length is 75mm, it is a double-start right-handed thread, and it is a Cr12MoV threaded element; the lead of the third threaded element 223 is 37.5mm, the length is 75mm, it is a double-start left-handed thread, and it is a Cr12MoV threaded element; the shaft core 224 is a 40CrNiMo shaft core, and three threaded elements are connected in series to form a screw.

[0044] Furthermore, in one embodiment, the communication port between the anti-overflow barrel 21 and the vacuum chamber 31 is disposed at the connection between the second threaded element 222 and the third threaded element 223 .

[0045] Furthermore, in one embodiment, the anti-overflow screw 22 includes a shaft core 224 and a plurality of transition rings 225. The plurality of threaded elements are sequentially sleeved on the shaft core 224 along the axial direction, and the transition rings 225 are respectively arranged between two adjacent threaded elements. Since the thread directions of two adjacent threaded elements are different, the transition ring 225 is used to separate the two adjacent threaded elements to ensure a smooth transition of the thread end faces between the threaded elements.

[0046] Among them, the head end of the shaft core 224 is provided with a shaft shoulder for limiting the axial position of the threaded element. The transition ring 225 and the threaded element are sequentially sleeved on the shaft core 224 and connected by a shaft key so that the threaded element rotates with the shaft core 224. The threaded element at the end of the shaft core 224 is connected to the shaft core 224 by a screw for fixing the axial position of the end threaded element.

[0047] Specifically, Figure 2 As shown, in one embodiment, the extruder 100 includes an anti-overflow drive member 23 and a bearing gland 24, the bearing gland 24 is connected to the anti-overflow barrel 21, the shaft core 224 passes through the bearing gland 24 and is in transmission connection with the anti-overflow drive member 23, and a sealing gasket 25 is provided between the bearing gland 24 and the shaft core 224. The bearing gland 24 is used to fix the axial position of the shaft core 224 so that the shaft core 224 can only rotate relative to the anti-overflow barrel 21, and the sealing gasket 25 is used to prevent the material from flowing out of the anti-overflow barrel 21.

[0048] Specifically, Figure 1 and Figure 2 As shown, in one embodiment, the extruder 100 includes a support frame 50, the top of the support frame 50 is connected to the overflow prevention barrel 21, and the bottom of the support frame 50 is provided with a rolling pulley 51. The support frame 50 provided with the rolling pulley 51 facilitates the movement of the overflow prevention component 20, the vacuum component 30 and the solid holding chamber 40, which is conducive to maintenance and replacement.

[0049] The extruder 100 further includes a reduction box 28, the overflow prevention driving member 23 is connected to the input shaft of the reduction box 28, and the output shaft of the reduction box 28 is connected to the shaft core 224 through a coupling. In addition, the reduction box 28 and the overflow prevention barrel 21 are both fixed to the support frame 50 by bolts.

[0050] Specifically, Figure 2 As shown, in one embodiment, the vacuum assembly 30 includes a vacuum pump and a pressure gauge 32, and a filter screen 33 is provided on the side wall of the vacuum chamber 31. The vacuum pump and the pressure gauge 32 are respectively connected to the side wall of the vacuum chamber 31. The filter screen 33 is used to filter solid impurities to prevent fixed materials from entering the vacuum pump and the pressure gauge 32.

[0051] The vacuum pump is connected to the vacuum chamber 31 through an exhaust pipe, and a pipeline valve 34 is provided on the exhaust pipe.

[0052] Furthermore, if Figure 1 As shown, in one embodiment, the vacuum assembly 30 includes a vacuum viewing window 35 for viewing the material blockage condition in the vacuum chamber 31 .

[0053] Specifically, Figure 2 As shown, in one embodiment, a discharge port 41 is provided at the bottom of the solid holding chamber 40 , and a visual window is provided on the side wall of the solid holding chamber 40 .

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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.

[0057] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0059] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. An extruder for preventing vacuum overflow, characterized in that: include: An extrusion assembly (10), the extrusion assembly (10) comprising an extruder barrel (11) and an extrusion screw, the extrusion screw being movably disposed in the extruder barrel (11); An anti-overflow assembly (20), the anti-overflow assembly (20) comprising an anti-overflow barrel (21) and an anti-overflow screw (22), the anti-overflow barrel (21) being connected to the extruder barrel (11), the anti-overflow screw (22) movably passing through the anti-overflow barrel (21) and inserted into the extruder barrel (11), the anti-overflow screw (22) comprising a left-handed first thread element (221), a right-handed second thread element (222) and a left-handed third thread element (223), the The first thread element (221), the second thread element (222) and the third thread element (223) are sequentially arranged in a direction away from the extruder barrel, the relationship between the pitch p1 of the first thread element (221) and the pitch p2 of the second thread element (222) is as follows: 1.5p1≤p2≤3p1, and the relationship between the pitch p1 of the first thread element (221) and the pitch p3 of the third thread element (223) is as follows: 0.5p1≤p3≤p1; A vacuum pumping assembly (30), the vacuum pumping assembly (30) comprising a vacuum chamber (31), the vacuum chamber (31) being in communication with the overflow prevention barrel (21); A solid containing chamber (40), the solid containing chamber (40) being in communication with the overflow prevention barrel (21) and being arranged opposite to the vacuum chamber (31).

2. The extruder for preventing vacuum overflow according to claim 1, characterized in that: The first threaded element (221), the second threaded element (222) and the third threaded element (223) are all double-start threads.

3. The extruder for preventing vacuum overflow according to claim 1, characterized in that: The communication port between the anti-overflow barrel (21) and the vacuum chamber (31) is arranged at the connection between the second threaded element (222) and the third threaded element (223).

4. The extruder for preventing vacuum overflow according to claim 1, characterized in that: The anti-overflow screw (22) comprises an axial core (224) and a plurality of transition rings (225), wherein the plurality of threaded elements are sequentially sleeved on the axial core (224) along the axial direction, and the transition rings (225) are respectively arranged between two adjacent threaded elements.

5. The extruder for preventing vacuum overflow according to claim 4, characterized in that: The extruder (100) includes an anti-overflow driving component (23) and a bearing cover (24), wherein the bearing cover (24) is connected to the anti-overflow barrel (21), the shaft core (224) passes through the bearing cover (24) and is transmission-connected to the anti-overflow driving component (23), and a sealing gasket (25) is provided between the bearing cover (24) and the shaft core (224).

6. The extruder for preventing vacuum overflow according to claim 1, characterized in that: The vacuum pump assembly (30) comprises a vacuum pump and a pressure gauge (32); a filter screen (33) is provided on the side wall of the vacuum chamber (31); and the vacuum pump and the pressure gauge (32) are respectively connected to the side wall of the vacuum chamber (31).

7. The extruder for preventing vacuum overflow according to claim 1, characterized in that: The bottom of the solid containing chamber (40) is provided with a discharge port (41), and the side wall of the solid containing chamber (40) is provided with a viewing window.

8. The extruder for preventing vacuum overflow according to claim 1, characterized in that: The extruder (100) comprises a support frame (50), the top of the support frame (50) is connected to the anti-overflow barrel (21), and the bottom of the support frame (50) is provided with a rolling pulley (51).

9. The extruder for preventing vacuum overflow according to claim 1, characterized in that: A connecting seat (26) is provided between the anti-overflow barrel (21) and the extruder barrel (11), one end of the connecting seat (26) is connected to the end of the anti-overflow barrel (21), and the other end of the connecting seat (26) is inserted into the side wall of the extruder barrel (11). A material channel is provided in the connecting seat (26) to connect the screw cavity of the anti-overflow barrel (21) with the screw cavity of the extruder barrel (11), and the third threaded element (223) is inserted into the connecting seat (26).

10. The extruder for preventing vacuum overflow according to claim 1, characterized in that: A heating element and a thermocouple (27) are provided on the side wall of the overflow prevention barrel (21).

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