A continuous vacuum extruding and wire-drawing device for rice noodles

Abstract

The present invention discloses a continuous vacuum wire extrusion device for rice noodles. A screw rod is arranged in a hollow cylinder body, and one end of the screw rod is connected to a transmission shaft in a transmission machine base; a feed inlet radially communicating with the chamber of the hollow cylinder body is provided on the barrel body of the hollow cylinder body, and the feed inlet is arranged close to the transmission machine base. A wire extrusion die head is installed at the discharge end of the hollow cylinder body, and an air extraction port communicating with the chamber is provided on the barrel body between the feed inlet and the wire extrusion die head; the screw rod is a variable pitch screw rod, and a rapid propulsion section, a stacking and blocking section, a closed exhaust section and an extrusion and discharging section are sequentially formed between the screw rod and the hollow cylinder body. The rapid feeding section corresponds to the area of the feed inlet, the air extraction port is arranged in the area of the closed exhaust section, and the stacking and blocking section corresponds to the screw pitch on the screw rod being smaller than the screw pitches on the screw rod corresponding to the rapid propulsion section and the closed exhaust section. By forming a self-closed space in the closed exhaust section and performing air extraction treatment, the breakage rate, splitting rate and crispness rate of the wire extrusion product are significantly reduced, and the quality of the wire extrusion product is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of deep processing of grain and food, and specifically relates to a continuous vacuum extruding and wire-drawing device for rice noodles, which is mainly applied to the forming and processing of cereal starch materials such as rice noodle wire-drawing and miscellaneous grain noodle rolling. The purpose is to process the molten semi-transparent colloid after gelatinization of cereal starch materials into geometric shapes such as linear, strip-shaped, sheet-shaped, and block-shaped. Background Art

[0002] Rice noodles and miscellaneous grain noodles are one of the extremely important ways of edible consumption and comprehensive utilization of paddy and miscellaneous grains, involving a large quantity and a wide range. Rice noodles are the ultimate consumer semi-finished products formed after rice is soaked, crushed, gelatinized, and formed. Rice noodles are divided into wet fresh rice noodles, straight dry noodles, and round dry noodles (instant rice noodles). The crispness rate, breakage rate, splitting rate, and paste soup performance are important indicators for evaluating the quality and finished product yield of various rice noodle products, and are also the decisive factors directly affecting the comprehensive benefits of rice noodle production.

[0003] The existing rice noodle processing technological process: raw material rice → cleaning → soaking → dehydration → crushing → gelatinization → extruding and wire-drawing forming → aging → drying (straight dry noodles, round dry noodles) → portioning and packaging → finished product.

[0004] Gelatinization, extruding and wire-drawing forming, and drying in the above processing technology are the key steps affecting the quality and comprehensive benefits of rice noodle products. Especially the wire-drawing process, while completing the forming of rice noodles, undertakes the subsequent gelatinization and homogenization of rice noodles, and its role is particularly important.

[0005] During the extruding and wire-drawing forming process, the gas doped in the dough is one of the important factors causing quality problems such as crispness, breakage, splitting, and paste soup of rice noodle products. During the extrusion forming process of industrialized rice noodle production, reducing and removing the gas entrained in the dough has been a technical bottleneck that the industry has been working hard to solve for many years. Summary of the Invention

[0006] In order to reduce and remove the gas entrained in the dough, improve the quality of rice noodle products, and reduce losses, the present invention provides a continuous vacuum extruding and wire-drawing device for rice noodles.

[0007] The technical solutions adopted are as follows:

[0008] A continuous vacuum extruding device for rice noodles, comprising a driving machine base, a screw rod with a feeding screw, and a hollow cylinder body with openings at both ends. A coaxial fixed connection is formed between the hollow cylinder body and the driving machine base. The screw rod is arranged in the chamber of the hollow cylinder body. One end of the screw rod is in driving connection with a transmission shaft installed in the driving machine base, and the other end of the screw rod is close to the discharging end of the hollow cylinder body. An inlet is provided on the barrel wall of the hollow cylinder body, which is radially communicated with its chamber. The inlet is close to the driving machine base. A wire extruding die head is installed at the discharging end of the hollow cylinder body. An air extraction port communicated with its chamber is also provided on the barrel wall of the hollow cylinder body between the inlet and the wire extruding die head. The screw rod is a variable pitch screw rod. Along the advancing direction of the screw rod, a rapid advancing section, a stacking and blocking section, a closed exhaust section, and an extrusion and discharging section are sequentially formed between the screw rod and the hollow cylinder body. The rapid feeding section is located in the area corresponding to the inlet. The air extraction port is arranged in the area formed by the closed exhaust section. The pitch of the screw corresponding to the stacking and blocking section is smaller than the pitches of the screw corresponding to the rapid advancing section and the closed exhaust section.

[0009] Preferably, the pitch of the screw corresponding to the closed exhaust section is the same as the pitch of the screw corresponding to the extrusion and discharging section.

[0010] Further preferably, a spiral discontinuous section is formed between the spiral end of the screw corresponding to the stacking and blocking section and the spiral starting end of the screw corresponding to the closed exhaust section. The spiral discontinuous length p formed by the spiral discontinuous section in the axial direction of the screw rod is p=(0.6-1.0)×t2, where t2 is the pitch of the screw corresponding to the stacking and blocking section.

[0011] Further preferably, the pitches of the screw corresponding to the rapid advancing section, the stacking and blocking section, and the closed exhaust section are t1, t2, and t3 respectively, and the pitches t1, t2, and t3 satisfy the following mathematical relationship:

[0012] t1=(1.8-3.0)×t2, t3=(1.1-1.3)×t1.

[0013] Preferably, the air extraction port is located in the middle area of the barrel wall of the hollow cylinder body. It is externally connected to a vacuum extraction device through a vacuum extraction pipe for extracting the gas in the hollow cylinder body corresponding to the closed exhaust section.

[0014] The wire extrusion die head includes a locking end cover, a wire extrusion template, a pressure equalizing plate, and a flow guide. The locking end cover is a cylindrical structure with openings at both ends, and one end thereof is detachably connected to the discharge end of the hollow cylinder. A number of radial through holes are formed on the pressure equalizing plate, and a connecting through hole I is formed in the middle thereof. A number of wire extrusion through holes are formed on the wire extrusion template, and a connecting through hole II corresponding to the connecting through hole I is formed in the middle thereof. The aperture of the wire extrusion through hole is smaller than that of the radial through hole. The flow guide sequentially penetrates through the connecting through hole I and the connecting through hole II, connects the pressure equalizing plate and the wire extrusion template into a whole, and is sleeved inside the locking end cover. An extrusion buffer cavity is formed between the pressure equalizing plate and the wire extrusion template. The radial circular end faces of the wire extrusion template and the pressure equalizing plate are respectively in extrusion sealing connection with the inner side surface of the locking end cover. The gelatinized molten translucent colloid is pushed by the screw into the locking end cover, and after being extruded and formed by the pressure equalizing plate and the wire extrusion template in sequence, it is discharged from the wire extrusion die head.

[0015] Further, the flow guide includes a conical surface flow guide body and a screw rod, and one end of the screw rod is vertically fixed at the large end face of the conical surface flow guide body.

[0016] More preferably, the locking end cover and the discharge end of the hollow cylinder form a detachable sealing connection structure through a buckle connecting piece, and the transmission base and the hollow cylinder form a detachable sealing connection through a flange.

[0017] Furthermore, a water jacket is also installed on the outer side of the barrel body of the hollow cylinder. An inlet and an outlet are respectively provided at both ends close to the water jacket. The inlet is arranged close to the wire extrusion die head, and the outlet is arranged close to the feed inlet.

[0018] Furthermore, a belt pulley is also provided on the transmission shaft extending from the end of the transmission base, and it drives the belt pulley, the transmission shaft, and the screw to rotate synchronously through a belt externally connected to a motor.

[0019] The technical solution of the present invention has the following advantages:

[0020] A. In the present invention, a screw structure with variable pitch is arranged in the hollow cylinder. Through the change of the pushing spiral pitch on the screw, four regions, namely a rapid propulsion section, a stacking and blocking section, a closed exhaust section, and an extrusion and discharging section, are formed along the screw in the pushing direction. At the same time, the screw pitch at the stacking and blocking section is smaller than that at the adjacent region positions. Therefore, a self - enclosed space is formed in the closed exhaust section. The present invention is provided with an air extraction port in the formed self - enclosed space, and the air extraction port is externally connected to a vacuum pumping device. Thus, the continuous exhaust function of the material during the rice noodle wire extrusion process is increased, and the breakage, splitting, and crispness rates of the extruded products can be significantly reduced, and the quality of the extruded products and the comprehensive benefits of the wire extrusion processing can be significantly improved.

[0021] B. The present invention adopts a unique structure of a multi - stage variable pitch extrusion conveying screw, realizing variable - speed conveying and repeated extrusion of materials, thereby improving the uniform consistency of material texture and the continuous stability of material properties, which has a positive effect on the continuous stability of product quality. At the same time, the extrusion die head structure adopted in the present invention enables the molten translucent colloid obtained by extrusion to first pass through a pressure - equalizing plate, enter the extrusion buffer cavity after passing through the pressure - equalizing plate, and then obtain a formed product after wire extrusion through the wire - extrusion template. The pressure in each part of the wire - extrusion process is uniform, and there will be no wire - extrusion breakage.

[0022] C. The continuous vacuum wire - extrusion device for rice noodles provided by the present invention is not only used for the wire - extrusion processing of rice noodles, but also can be used for the forming processing of geometric shapes such as linear, strip - shaped, sheet - shaped, and block - shaped of the molten translucent colloid after gelatinization of cereal starch materials such as corn noodles, oat noodles, and buckwheat noodles, realizing multi - purpose use of one machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the specific embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is the overall structural schematic diagram of the device provided by the present invention;

[0025] Figure 2 is Figure 1 the structural schematic diagram of the combined extrusion die head in

[0026] Figure 3 is Figure 2 the split - structure schematic diagram of the extrusion die head in

[0027] Figure 4 is Figure 1 the structural schematic diagram of the hollow cylinder in

[0028] Figure 5 is Figure 1 the structural schematic diagram of the screw in

[0029] Figure 6 is the working - state schematic diagram of the rice - noodle device provided by the present invention.

[0030] The description of the identification symbols provided in the drawings is as follows:

[0031] 1 - drive base

[0032] 2 - screw

[0033] 3 - hollow cylinder

[0034] 31 - Feed inlet, 32 - Air extraction port, 33 - Wedge lock

[0035] 4 - Extrusion die head

[0036] 41 - Locking end cover

[0037] 42 - Extrusion die plate

[0038] 421 - Extrusion through - hole, 422 - Connecting through - hole II

[0039] 43 - Equalizing plate

[0040] 431 - Radial through - hole, 432 - Connecting through - hole I

[0041] 44 - Flow - guide device

[0042] 441 - Conical surface flow - guide body, 442 - Screw rod

[0043] 4a - Extrusion buffer cavity

[0044] 5 - Vacuum extraction pipe, 6 - Lock connection part, 7 - Flange

[0045] 8 - Water jacket

[0046] 81 - Water inlet, 82 - Water outlet

[0047] 9 - Transmission shaft; 10 - Belt pulley; 20 - Molten translucent colloid; 30 - Vacuum gauge a - Rapid - advance section, b - Accumulation and blockage section, c - Closed exhaust section, d - Extrusion and discharging section e - Self - sealing space. Detailed implementation manners

[0048] Next, the technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0049] Such as Figure 1 And Figure 5As shown in the figure, the present invention provides a continuous vacuum extrusion wire device for rice noodles, which includes a driving machine base 1, a screw rod 2 with a feeding screw, and a hollow cylinder 3 with openings at both ends. A coaxial fixed connection is formed between the hollow cylinder 3 and the driving machine base 1, and the present invention adopts flange connection. The screw rod 2 is arranged in the chamber of the hollow cylinder 3. One end of the screw rod 2 is in driving connection with a transmission shaft 9 installed in the driving machine base 1, and the other end of the screw rod 2 is close to the discharging end of the hollow cylinder 3. Here, the screw rod 2 preferably adopts a hollow structure. The screw rod 2 and the transmission shaft 9 are connected by insertion and spline connection. The transmission shaft 9 is assembled in the inner cavity of the driving machine base 1 through a support bearing; an inlet 31 radially communicating with its chamber is provided on the barrel of the hollow cylinder 3, and the inlet 31 is arranged close to the driving machine base 1. A wire extrusion die head 4 is installed at the discharging end of the hollow cylinder 3, that is Figure 1 at the left end position in Figure 4 . A vacuum extraction port 32 communicating with its chamber is also provided on the barrel of the hollow cylinder 3 between the inlet 31 and the wire extrusion die head 4. Connecting the vacuum extraction port 32 to an external vacuum device can perform vacuum treatment on the inside of the hollow cylinder. The screw rod 2 adopted in the present invention is a variable pitch screw rod. Along the advancing direction of the screw rod 2, a rapid advancement section a, a stacking and blocking section b, a closed exhaust section c, and an extrusion and discharging section d are sequentially formed between the screw rod 2 and the hollow cylinder 3. The rapid feeding section a is located in the area corresponding to the inlet 31, and the vacuum extraction port 32 is arranged in the area formed by the closed exhaust section c. The screw pitch corresponding to the stacking and blocking section b on the screw rod 2 is smaller than the screw pitches corresponding to the rapid advancement section a and the closed exhaust section c on the screw rod 2, as Figure 5 shown.

[0050] Of course, the screw pitch corresponding to the closed exhaust section c on the screw rod 2 in the present invention is the same as the screw pitch corresponding to the extrusion and discharging section d on the screw rod 2. As shown in Figure 5 , the area of the left pitch t3 of the screw rod shown contains the closed exhaust section c and the extrusion and discharging section d.

[0051] As Figure 4 shown, the present invention also disconnects the feeding screw on the screw rod, that is, a spiral discontinuous section is formed at the spiral end of the screw rod 2 corresponding to the stacking and blocking section b and the spiral starting end of the screw rod 2 corresponding to the closed exhaust section c. The spiral discontinuous length p formed by the spiral discontinuous section in the axial direction of the screw rod 2 is p=(0.6 - 1.0)×t2, where t2 is the screw pitch corresponding to the stacking and blocking section b on the screw rod 2. The screw pitches corresponding to the rapid advancement section a, the stacking and blocking section b, and the closed exhaust section c on the screw rod 2 are t1, t2, and t3 respectively, and the screw pitches t1, t2, and t3 satisfy the following mathematical relationship:

[0052] t1=(1.8 - 3.0)×t2, t3=(1.1 - 1.3)×t1.

[0053] AsFigure 6 As shown, after the raw materials are input into the hollow cylinder 3 through the feed inlet 31, the materials in the hollow cylinder 3 are rapidly pushed forward under the action of the variable pitch extrusion conveying screw 2; with the change of the screw structure, the materials gradually accumulate, the density increases and a blockage is formed; the blockage body is continuously pushed forward by the continuously input materials, and after passing through the spiral intermittent section, it is cut, broken by the spiral blade t3 and quickly pushed to the discharge end; the materials are subjected to the damping effect of the wire extrusion template at the discharge end to form secondary extrusion and congestion. As the extrusion force increases and balances, the materials flow out in a wire shape (or sheet shape) along the forming holes of the wire extrusion template to form a wire extrusion product; at the same time, a self-sealing space e is formed during the two extrusion blockage processes of the materials. This space is connected to the vacuum pumping device through the air extraction port 32, and under the action of vacuum, the gases existing and generated in the hollow cylinder and the materials are continuously removed to complete the continuous vacuum wire extrusion process.

[0054] In order to adjust and balance the process temperature of the materials during the operation of the entire device, such as Figure 4 shown, a water jacket 8 with both ends sealed is installed on the barrel body of the hollow cylinder 3, and Figure 3 a water inlet 81 is arranged at the lower part of the left end, and a water outlet 82 is arranged above the right end, which are used to introduce cooling water or other liquid refrigerant or heat medium. During use, they can be respectively connected to the corresponding refrigerant or heat medium pipelines.

[0055] The present invention preferably sets the air extraction port 32 in the middle area of the barrel body of the hollow cylinder 3, which is externally connected to the vacuum pumping device through the vacuum extraction pipe 5 for extracting the gases in the hollow cylinder 3 corresponding to the closed exhaust section c.

[0056] Such as Figure 2 and Figure 3 shown, the wire extrusion die head 4 includes a locking end cover 41, a wire extrusion template 42, a uniform pressure plate 43 and a flow guide 44. The locking end cover 41 adopts a cylindrical structure with both ends open, and one end thereof is detachably connected to the discharge end of the hollow cylinder 3; a number of radial through holes 431 are formed on the uniform pressure plate 43, and a connecting through hole I432 is formed in the middle thereof. The connecting through hole I432 extends axially in one direction, and at the same time, the outer circumferential end face of the uniform pressure plate 43 also extends axially in the same side direction. The end face of the connecting through hole I is flush with the side face of the outer circumferential end face of the uniform pressure plate, such as Figure 3As shown in the figure, a number of wire extrusion through-holes 421 are formed on the wire extrusion template 42, and a connection through-hole II 422 corresponding to the connection through-hole I 432 is formed in the middle of the wire extrusion template 42. The aperture of the wire extrusion through-hole 421 is smaller than that of the radial through-hole 431. The flow deflector 44 sequentially passes through the connection through-hole I 432 and the connection through-hole II 422, connects the equalizing pressure plate 43 and the wire extrusion template 42 into a whole, and sleeved it inside the locking end cover 41. An extrusion buffer cavity 4a is formed between the equalizing pressure plate 43 and the wire extrusion template 42. The radial circular end faces of the wire extrusion template 42 and the equalizing pressure plate 43 are respectively in extrusion sealing connection with the inner side surface of the locking end cover 41. The gelatinized molten translucent colloid 20 is pushed into the locking end cover 41 by the screw 2, and after being sequentially extruded and formed by the equalizing pressure plate 43 and the wire extrusion template 42, it is discharged from the wire extrusion die head 4.

[0057] As Figure 3 shown, the flow deflector 44 adopted in the present invention includes a conical surface flow deflector 441 and a screw rod 442. One end of the screw rod 442 is vertically fixed at the large end face of the conical surface flow deflector 441. During installation, the screw rod 442 sequentially passes through the connection through-hole I and the connection through-hole II, so that the large end face of the conical surface flow deflector 441 fits on the end face of the equalizing pressure plate 43, and the protruding end of the screw rod 442 is locked by a nut, so that the equalizing pressure plate and the wire extrusion template 42 form a whole, and then the whole is sleeved into the inner cavity of the locking end cover 41 from the right end in the figure of the locking end cover 41. In order to facilitate the replacement or cleaning of the wire extrusion die head 4, as Figure 4 shown, a surrounding wedge-shaped lock 33 is provided on the barrel body at the discharge end of the hollow barrel 3. Preferably, the locking end cover 41 and the wedge-shaped lock 33 provided at the discharge end of the hollow barrel 3 form a detachable sealing connection structure through the lock connection member 6, and a detachable sealing connection is formed between the drive base 1 and the hollow barrel 3 through the flange 7, which is more convenient for the staff to carry out disassembly and maintenance work.

[0058] In addition, as Figure 1 shown, a belt pulley 10 is also provided on the transmission shaft 9 extending from the end of the drive base 1. It is externally connected to a motor through a V-belt to drive the belt pulley 10, the transmission shaft 9 and the screw 2 to rotate synchronously. At the same time, a vacuum gauge 30 is installed on the vacuum extraction pipe 5. During vacuum extraction, the staff can clearly see the vacuum state inside the hollow barrel 3 from the vacuum gauge 30. By observing the vacuum gauge 30, the vacuum degree in the cavity can be controlled, which is more convenient for thoroughly removing the gases existing and generated in the hollow barrel 3 and the material.

[0059] As Figure 6, in the present invention, a motor drives a variable pitch screw to rotate at a high speed, continuously pushing the material (molten rice flour dough) input from the feed port 31 to move along the inner cavity of the hollow cylinder at a variable speed towards the die head end. At the same time, the vacuum device operates to create a local vacuum in the middle of the hollow cylinder cavity. Under the action of this vacuum, the air in the cavity and the internal bubbles of the rice flour dough are removed. Subsequently, the rice flour dough is extruded in the form of lines or strips through the die head to complete the wire extrusion process.

[0060] The continuous vacuum wire extrusion device for rice noodles provided by the present invention can effectively solve problems such as broken strips, split strips, crispy strips, and delamination caused by air bubble entrainment existing and generated during the continuous extrusion molding process of various shaped products such as starch strips, wires, and slices, achieving products with a dense and uniform texture, smooth surface, and high yield. Moreover, the present invention can be widely applied to fields such as rice noodle wire extrusion processing, extruded noodle processing, and starch vermicelli processing.

[0061] What is not described in the present invention applies to the prior art.

[0062] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A continuous vacuum extrusion device for rice noodles, comprising a driving machine base (1), a screw rod (2) with a feeding screw, and a hollow cylinder body (3) with openings at both ends. A coaxial fixed connection is formed between the hollow cylinder body (3) and the driving machine base (1). The screw rod (2) is arranged in the chamber of the hollow cylinder body (3). One end of the screw rod (2) is in driving connection with a transmission shaft (9) installed in the driving machine base (1), and the other end of the screw rod (2) is close to the discharging end of the hollow cylinder body (3). A feeding port (31) radially communicating with the chamber of the hollow cylinder body (3) is provided on the cylinder wall of the hollow cylinder body (3). The feeding port (31) is arranged close to the driving machine base (1). A wire extrusion die head (4) is installed at the discharging end of the hollow cylinder body (3), and it is characterized in that, On the cylinder body of the hollow cylinder (3) located between the feed inlet (31) and the wire extrusion die head (4), there is also an air extraction port (32) communicated with its chamber; the screw (2) is a variable pitch screw. Along the advancing direction of the screw (2), a rapid advancement section (a), a stacking and blocking section (b), a closed exhaust section (c), and an extrusion and discharging section (d) are sequentially formed between the screw (2) and the hollow cylinder (3). The rapid advancement section (a) is located in the area corresponding to the feed inlet (31), the air extraction port (32) is arranged in the area formed by the closed exhaust section (c), and the spiral pitch of the stacking and blocking section (b) corresponding to the screw (2) is smaller than the spiral pitches of the rapid advancement section (a) and the closed exhaust section (c) corresponding to the screw (2). The spiral pitch of the closed exhaust section (c) corresponding to the screw (2) is the same as the spiral pitch of the extrusion and discharging section (d) corresponding to the screw (2). The spiral end of the screw (2) corresponding to the stacking and blocking section (b) and the spiral start end of the screw (2) corresponding to the closed exhaust section (c) form a spiral discontinuous section, and the spiral discontinuous length p formed in the axial direction of the screw (2) is p = (0.6 - 1.0) × t2, where t2 is the spiral pitch of the screw (2) corresponding to the stacking and blocking section (b). A water jacket (8) is also installed on the outer side of the cylinder body of the hollow cylinder (3). An inlet (81) and an outlet (82) are respectively arranged near both ends of the water jacket (8). The inlet (81) is arranged near the wire extrusion die head (4), and the outlet (82) is arranged near the feed inlet (31).

2. The rice noodle continuous vacuum wire extrusion device according to claim 1, characterized in that The spiral pitches of the screw (2) corresponding to the rapid advancement section (a), the stacking and blocking section (b), and the closed exhaust section (c) are t1, t2, and t3 respectively, and the spiral pitches t1, t2, and t3 satisfy the following mathematical relationship: t1 = (1.8 - 3.0) × t2, t3 = (1.1 - 1.3) × t1.

3. The rice noodle continuous vacuum extruding and wire-drawing device according to claim 1 or 2, characterized in that, The air extraction port (32) is located in the middle area of the cylinder body of the hollow cylinder (3), and it is externally connected to a vacuum extraction device through a vacuum extraction pipe (5) for extracting the gas in the hollow cylinder (3) corresponding to the closed exhaust section (c).

4. The rice noodle continuous vacuum wire extrusion device according to claim 1, characterized in that The wire extrusion die head (4) includes a locking end cover (41), a wire extrusion template (42), a pressure equalizing plate (43) and a flow guide (44). The locking end cover (41) is a cylindrical structure with openings at both ends, and one end thereof is detachably connected to the discharge end of the hollow cylinder (3). A plurality of radial through holes (431) are formed in the pressure equalizing plate (43), and a connecting through hole I (432) is formed in the middle thereof. A plurality of wire extrusion through holes (421) are formed in the wire extrusion template (42), and a connecting through hole II (422) corresponding to the connecting through hole I (432) is formed in the middle thereof. The aperture of the wire extrusion through hole (421) is smaller than the aperture of the radial through hole (431). The flow guide (44) sequentially passes through the connecting through hole I (432) and the connecting through hole II (422), connects the pressure equalizing plate (43) and the wire extrusion template (42) into a whole, and sleeved it inside the locking end cover (41). An extrusion buffer cavity (4a) is formed between the pressure equalizing plate (43) and the wire extrusion template (42). The radial circular end faces of the wire extrusion template (42) and the pressure equalizing plate (43) are respectively in extrusion sealing connection with the inner side surface of the locking end cover (41). The gelatinized molten translucent colloid (20) is pushed by the screw (2) into the locking end cover (41), and after being extruded through the pressure equalizing plate (43) and the wire extrusion template (42) in sequence, it is discharged from the wire extrusion die head (4).

5. The continuous vacuum wire extrusion device for rice noodles according to claim 4, wherein the flow guide (44) includes a conical surface flow guide body (441) and a screw rod (442), and one end of the screw rod (442) is vertically fixed at the large end surface of the conical surface flow guide body (441).

6. The continuous vacuum wire extrusion device for rice noodles according to claim 5, wherein the locking end cover (41) and the discharge end of the hollow cylinder (3) form a detachable sealed connection structure through a lock connecting piece (6), and a detachable sealed connection is formed between the driving machine base (1) and the hollow cylinder (3) through a flange (7).

7. The continuous vacuum wire extrusion device for rice noodles according to claim 1, wherein a pulley (10) is further provided on the transmission shaft (9) extending from the end of the driving machine base (1), and the pulley (10), the transmission shaft (9) and the screw (2) are driven to rotate synchronously by an external motor through a belt.

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