WO2021253896A1

WO2021253896A1 - Special calender roll for flour food products and manufacturing method therefor

Info

Publication number: WO2021253896A1
Application number: PCT/CN2021/081397
Authority: WO
Inventors: 汪瑞军; 詹华; 张学阁; 李振东; 鲍曼雨; 李世岩
Original assignee: 中国农业机械化科学研究院; 北京金轮坤天特种机械有限公司
Priority date: 2020-06-17
Filing date: 2021-03-18
Publication date: 2021-12-23
Also published as: CN111713523A; CN111713523B

Abstract

The present invention relates to the technical field of flour food processing equipment, and discloses a special calender roll for flour food products and a manufacturing method therefor. The calender roll is disposed symmetrically and comprises a first calender roll and a second calender roll, and the two calender rolls are of the same structure. The calender roll comprises two support shafts, and a cylindrical base body is provided between the two support shafts. The cylindrical base body of the calender roll is sleeved with a calender roll barrel, protrusions of a micro-spherical structure are prepared on the outer surface of the calender roll barrel, and the outer surface of the calender roll barrel is coated with a low-surface-energy chemical vapor deposition carbon-based doped film. The present invention also provides a manufacturing method for the special calender roll for flour food products. According to the calender roll manufactured using this manufacturing method, the contact angle between water droplets and the surface of the calender roll is improved by means of an element-doped film, the adhesive capacity of a noodle belt on the surface of the calender roll is thus reduced, and the amount of water added for producing noodle by machine can be greatly increased.

Description

Special calender roll for pasta products and manufacturing method thereof

Technical field

The invention relates to the technical field of pasta processing equipment, in particular to a special calender roll for pasta products and a manufacturing method thereof.

Background technique

Flour and water are mixed to make dough, and then pressed by multi-stage calendering rollers to form noodles with different thicknesses. It is an important process for the industrial production of dried noodles, fresh wet noodles and other pasta products. "Calendar" is a process that simulates hand-made noodles, which can enhance the strength and toughness of gluten and make the connection of dough more dense. The calendering roller is the key component to realize this process. At present, the amount of water added for hand-made noodles is usually more than 50%, while the amount of water added for machine-made noodles is only 30% to 35%. This is because the calendering process and increasing the amount of water will increase the proportion of weak free water in the dough system. The adhesive ability of the dough and noodles leads to problems such as sticking around the roll and breaking of the noodles during the calendering process. Therefore, for the machine-made noodle production process, preventing noodle sticking on the surface of the calender roll is the core technology to increase the amount of water added to the machine-made noodle. At present, the anti-adhesion technology in the processing of machine-made surface at home and abroad can be divided into reducing the amount of water added, scraping off the scraper, spreading dry flour, painting the surface of the calendering roller with vegetable oil, improving the surface finish, and using non-metallic calendering rollers. These anti-sticking technologies effectively ensure the continuous calendering process of the noodle belt, but they are not effective in increasing the amount of water added to the noodle making. At the same time, the entire calendering process has secondary problems such as roll surface wear, food hygiene, and waste of resources.

Summary of the invention

The purpose of the present invention is to provide a special calender roll for pasta products and a manufacturing method thereof to solve the above-mentioned problems in the prior art. The element-doped film coated on the surface improves the contact angle between water droplets and the surface of the calender roll, reduces the adhesion of the noodle belt on the surface of the calender roll, and can greatly increase the amount of water added to the machine surface.

In order to achieve the above objectives, the present invention provides the following solutions:

The invention provides a special calender roll for pasta products, which includes a first calender roll and a second calender roll that are symmetrically arranged; the first calender roll includes two support shafts, and a cylindrical base is arranged between the two support shafts , The second calender roll and the first calender roll have the same structure; the cylindrical substrates of the first calender roll and the second calender roll are respectively sleeved with a calender roll body, and the outer surface of the calender roll A plurality of protrusions with a microsphere structure are uniformly prepared on the upper surface, and the outer surface of the calendering roller is covered with a low surface energy chemical vapor deposition carbon-based doped film.

Optionally, the low surface energy chemical vapor deposition carbon-based doped film is a fluorine-doped carbon-based film.

Optionally, the diameter of the protrusion is 4 to 5 mm, the distance between two adjacent protrusions is 6 to 8 mm, and the height of the protrusion is 1 to 1.5 mm; the calendering roller The part of the body located between two adjacent protrusions has a smooth arc structure.

Optionally, the thickness of the low surface energy chemical vapor deposition carbon-based doped film is 3-10 μm.

Optionally, the diameter of the first calender roll is 190-400mm, the length of the first calender roll is 210-340mm, the surface finish of the first calender roll is 0.4-1.6μm; the second calender The size of the roll is the same as the size of the first calender roll.

The present invention also provides a method for manufacturing a special calender roll for pasta products, which includes the following steps:

Step 1: Treat the surface of the 1.5-2mm stainless steel plate base material, and grind to ensure the surface finish Ra 1～2μm;

Step 2: Use an abrasive tool to stamp and prepare protrusions on the surface of the substrate, and ensure that the joints between the protrusions and the surface of the substrate are arc-shaped structures;

Step 3: Roll the base material with raised parts into a cylinder with a diameter of 190-400mm and a length of 210-340mm. The joints are welded by laser or electron beam without filler and the welds are ground and polished;

Step 4: Grind the cylinder twice to a surface roughness Ra 0.4～1.6μm, and then perform plasma glow cleaning and chemical vapor deposition in sequence to obtain a calendering roller body, and the calendering roller body is respectively sleeved on the first calendering The outer surface of the cylindrical base of the roller and the second calender roller are fixed in the axial and circumferential directions.

Optionally, in step 2, the conditions of the stamping include a stretching force of 6000-12000N and a stamping speed of 20-25 times/min.

Optionally, in step 3, the conditions for laser welding include current I=155～165A, pulse width T=4～8ms, frequency f=18～24Hz, welding speed v=450～500mm/min; conditions for electron beam welding Including high voltage 45～50Kv, beam current 18～30mA, focusing current 1.80～1.9A, linear velocity v=400～500mm/min, vacuum degree <1×10 ^-2 Pa.

Optionally, in step 4, the conditions for plasma glow cleaning include a vacuum degree of 1 to 1.5×10 ^-3 Pa, a gas source of argon, and a voltage of 1 to 2 kV; the precursor of the chemical vapor deposition is tetrafluoride Carbon and methane, auxiliary gas is argon, chemical vapor deposition conditions include vacuum degree 0.5～1.5Pa, ratio of carbon tetrafluoride and methane mixture is 1:1～4:1, voltage 0.8～1.5kV, deposition time 30 ~60min.

Compared with the prior art, the present invention has achieved the following technical effects:

The first calender roll and the second calender roll of the present invention are used in a pair in parallel, and the protrusions on the surfaces of the two rollers are arranged on the protrusions. The loose dough is squeezed by the calender roller to bond to each other and undergo plastic deformation, making the dough more compact and forming a dough belt. The micro-spherical protrusions on the surface of the calender roll can increase the contact area and deformation space of the noodle belt, reduce and release the internal pressure stress, and weaken the adhesion effect induced by the pressure; at the same time, there is no bump on the two roll surfaces. The pressure of the part is reduced, which improves the abrasion resistance of the anti-stick coating. The outermost layer is a fluorinated doped carbon-based film (F～DLC). Although the pressure increases the wetting ability of the noodle belt on the roll surface, the surface energy of the calender roll is reduced (compared with the original substrate), which makes both The thermodynamic adsorption between them is weakened. Through this three-level anti-sticking measure, the adhesion of the dough belt on the surface of the calender roll can be greatly reduced, so as to achieve the goal of increasing the amount of water added to the machine surface.

The invention adopts the method of ensuring the surface smoothness Ra0.4～1.6μm, preparing the microsphere-shaped protrusions and designing the composite coating structure, which can significantly reduce the adhesive ability of the noodle belt on the surface of the calender roll and increase the amount of water added to the machine surface To 45-55%; at the same time, secondary problems such as food hygiene caused by anti-sticking measures such as spreading dry powder and painting vegetable oil are avoided. In addition, since the scraper is not attached to the roller surface, mechanical wear between the two is avoided, and the consistency of the thickness of the surface in the width direction is ensured, which is essential for the final calendering and ensuring the quality of the finished product.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

Figure 1 is a structural schematic diagram of the use process of a special calender roll for pasta products of the present invention;

Figure 2 is a partial enlarged view of I in Figure 1;

Figure 3 is a schematic diagram of the structure of the calender roll of the present invention;

Among them, 1 is the first calender roll, 2 is the second calender roll, 3 is the calender roller body, 4 is the protrusion, 5 is the low surface energy chemical vapor deposition carbon-based doped film, 6 is the arc structure, 7 For noodles.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a special calender roll for pasta products and a manufacturing method thereof to solve the above-mentioned problems in the prior art, improve the surface contact angle through the element-doped film, and reduce the adhesive ability of the noodle belt on the surface of the calender roll , Can greatly increase the amount of water added to the machine.

In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention provides a special calender roll for pasta products, as shown in Figures 1 to 3, comprising a first calender roll 1 and a second calender roll 2 with the same structure and symmetrically arranged; a first calender roll 1 and a second calender roll 2 Each includes two support shafts, a cylindrical base is arranged between the two support shafts, and the cylindrical bases of the first calender roll 1 and the second calender roll 2 are respectively sleeved with a calender roller body 3, the calender roller The outer surface of the body 3 is uniformly prepared with a plurality of protrusions 4 with a microsphere structure, and the outer surface of the calendering roller body 3 is covered with a low surface energy chemical vapor deposition carbon-based doped film 5.

Further preferably, the low surface energy chemical vapor deposition carbon-based doped film 5 is a fluorine-doped carbon-based film. The diameter of the protrusion 4 is 4 to 5 mm, the distance between two adjacent protrusions 4 is 6 to 8 mm, and the height of the protrusion 4 is 1 to 1.5 mm; the calendering roller body 3 is located in two adjacent protrusions The part between the parts 4 is a smooth arc structure 6. The thickness of the low surface energy chemical vapor deposition carbon-based doped film 5 is 3-10 μm.

The diameter of the first calender roll 1 is 190-400mm, the length of the first calender roll 1 is 210-340mm, the surface finish of the first calender roll 1 is 0.4-1.6μm; the size of the second calender roll 2 and the first calender roll 1 same.

Step 2: Use an abrasive tool to stamp the surface of the substrate to prepare the protrusions 4, and ensure that the joints between the protrusions 4 and the surface of the substrate are arc-shaped structures 6; the conditions of the stamping include a tensile force of 6000-12000N, and a stamping speed of 20 ~25 times/minute.

Step 3: Roll the base material with protrusions 4 into a cylinder with a diameter of 190-400mm and a length of 210-340mm. The joints are welded by laser or electron beam filler-free and the welds are polished and polished; Laser welding conditions include current I=155～165A, pulse width T=4～8ms, frequency f=18～24Hz, welding speed v=450～500mm/min; electron beam welding conditions include high voltage 45～50Kv, beam current 18～30mA, focusing current 1.80～1.9A, linear velocity v=400～500mm/min, vacuum degree <1×10 ^-2 Pa.

Step 4: Grind the cylinder twice to a surface roughness of Ra 0.4～1.6μm, then perform plasma glow cleaning and chemical vapor deposition in sequence to obtain a calendering roller body 3, which is sleeved on the first The outer surfaces of the cylindrical substrate of a calender roll 1 and a second calender roll 2 are fixed in the axial and circumferential directions; the conditions of plasma glow cleaning include vacuum degree 1～1.5×10 ^-3 Pa, gas source is argon gas , The voltage is 1～2kV; the precursors of chemical vapor deposition are carbon tetrafluoride and methane, the auxiliary gas is argon, the conditions of chemical vapor deposition include vacuum degree 0.5～1.5Pa, the ratio of carbon tetrafluoride and methane mixture is 1 :1～4:1, voltage 0.8～1.5kV, deposition time 30～60min.

When the special calender roll for pasta products manufactured by the present invention is used, the first calender roll 1 and the second calender roll 2 are used in pairs in parallel, and are designed such that the protrusions 4 on the surfaces of the two rolls are arranged in pairs. The loose dough is squeezed by the calendering roller to adhere to each other and undergo plastic deformation, so that the dough structure is more dense to form a noodle band 7 (corresponding to the thin end). The microsphere-shaped protrusions on the surface of the calendering roller can increase the contact area and deformation space of the noodle belt 7, reduce and release the internal pressure stress, and weaken the adhesion effect induced by pressure; at the same time, there are no protrusions 4 on the two roller surfaces. The pressure at the butt joint is reduced, which improves the abrasion resistance of the anti-stick coating. The outermost layer is a fluorinated-doped carbon-based film (F～DLC). Although the pressure increases the wetting ability of the noodle belt 7 on the roll surface, the surface energy of the calender roll is reduced (compared with the original substrate), making the two The thermodynamic adsorption between the two is weakened. Through the three-level anti-adhesion measures, the adhesion ability of the dough belt 7 on the surface of the calender roll can be greatly reduced, thereby achieving the goal of increasing the amount of water added to the machine surface.

Example 1:

This embodiment provides a special calender roll for pasta products and a manufacturing method thereof. The stainless steel plate length×width×thickness=594.5×210×1.5 mm is selected, and the surface finish Ra 1 μm is obtained by grinding. A stamping and stretching process is used to prepare closely-packed micro-spherical structure protrusions on the surface of the substrate, with a stretching force of 6700N. The raised part has a diameter of 4.5mm, a height of 1mm, and a spacing of 6mm. The base material with protrusions is rolled into a cylinder with an outer diameter of 191mm and a length of 210mm. The welding seam is welded by CO ₂ laser and the welding seam is ground and polished; the welding parameters are current I=160A, pulse width T=6ms, frequency f=20Hz, welding speed v=450mm/min. The secondary grinding and polishing treatment guarantees the surface finish, Ra0.8μm. A fluorinated diamond-like carbon film (F～DLC) was prepared on the outer surface of the cylinder, the vacuum degree was 1.0 Pa, the ratio of carbon tetrafluoride and methane mixed gas was 4:1, the voltage was 1.2 kV, and the deposition time was 50 min. Finally, the prepared cylinder is sleeved on the outer surface of the cylindrical base of the calender roll and fixed in the axial and circumferential directions. After testing, the obtained F-DLC film has a thickness of 6.5 μm and a contact angle of 116° with water. The calendering roller is used to make noodles, and the amount of water added to the noodles can reach 52%, and the calendering process is stable.

Example 2:

This embodiment provides a special calender roll for pasta products and a manufacturing method thereof. The stainless steel plate length×width×thickness=624.5×240×2.0 mm, and the surface finish Ra 1 μm is obtained by grinding. The close-packed protrusions are prepared on the surface of the substrate by the stamping and stretching process, and the stretching force is 11000N. The raised part has a diameter of 4.8mm, a height of 1.3mm, and a spacing of 7mm. The base material with protrusions is rolled into a cylinder with an outer diameter of 201mm and a length of 240mm. Electron beam welding (EBW) and the weld seam polishing process; Main welding parameters high pressure 50kV, beam 20mA, focusing current 1.82 ~ 1.83A, linear velocity v = 500mm / min, degree of vacuum of 3.0 × 10 ^{- 2} Pa. The secondary grinding and polishing treatment guarantees the surface finish, Ra 0.8μm. A fluorinated diamond-like carbon film (F～DLC) was prepared on the outer surface of the cylinder, the vacuum degree was 1.5Pa, the ratio of carbon tetrafluoride and methane mixed gas was 4:1, the voltage was 1.5kV, and the deposition time was 60min. Finally, the prepared cylinder is sleeved on the outer surface of the cylindrical base of the calender roll and fixed in the axial and circumferential directions. After testing, the resulting F-DLC film has a thickness of 8.5 μm and a contact angle of 112° with water. The calendering roller is used to make noodles, and the amount of water added to the noodles can reach 48%, and the calendering process is stable.

Example 3:

This embodiment provides a special calender roll for pasta products and a manufacturing method thereof. The stainless steel plate length×width×thickness=750.5×300×2.0 mm, and the surface finish Ra 2 μm is obtained by grinding. The close-packed protrusions are prepared on the surface of the substrate by a stamping and stretching process with a tensile force of 11500N. The raised part has a diameter of 4.8mm, a height of 1.5mm, and a spacing of 7mm. The base material with protrusions is rolled into a cylinder with an outer diameter of 240mm and a length of 300mm. The welding seam is welded by CO ₂ laser and the welding seam is ground and polished; the welding parameters are current I=160A, pulse width T=5ms, frequency f=18Hz, welding speed v=450mm/min. The secondary grinding and polishing treatment guarantees the surface finish, Ra 1.6μm. A fluorinated diamond-like carbon film (F～DLC) was prepared on the outer surface of the cylinder, the vacuum degree was 1.0 Pa, the ratio of carbon tetrafluoride and methane mixed gas was 4:1, the voltage was 1.3 kV, and the deposition time was 40 min. Finally, the prepared cylinder is sleeved on the outer surface of the cylindrical base of the calender roll and fixed in the axial and circumferential directions. After testing, the obtained F-DLC film has a thickness of 5.2 μm and a contact angle of 108° with water. The calendering roller is used to make noodles, and the amount of water added to the noodles can reach 45%, and the calendering process is stable.

In the present invention, specific examples are used to illustrate the principles and implementation of the present invention. The description of the above examples is only used to help understand the method and core idea of the present invention; at the same time, for those of ordinary skill in the art, according to this The idea of the invention will change in the specific implementation and the scope of application. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

A special calender roll for pasta products, which is characterized in that it comprises a symmetrically arranged first calender roll and a second calender roll; the first calender roll includes two supporting shafts, and a cylindrical shape is arranged between the two supporting shafts. The base body, the second calender roll and the first calender roll have the same structure; the cylindrical substrates of the first calender roll and the second calender roll are respectively sheathed with a calender roller body, the calender roller body A plurality of protrusions with a microsphere structure are uniformly prepared on the surface, and the outer surface of the calendering roller is covered with a low surface energy chemical vapor deposition carbon-based doped film.
The special calender roll for pasta products according to claim 1, wherein the low surface energy chemical vapor deposition carbon-based doped film is a fluorine-doped carbon-based film.
The special calender roll for pasta products according to claim 1, characterized in that: the diameter of the protrusions is 4 to 5 mm, the distance between two adjacent protrusions is 6 to 8 mm, and the protrusions The height of the calender roller is 1 to 1.5 mm; the part of the calendering roller body between the two adjacent protrusions has a smooth arc structure.
The special calender roll for pasta products according to claim 1, wherein the thickness of the low surface energy chemical vapor deposition carbon-based doped film is 3-10 μm.
The special calender roll for pasta products according to claim 1, wherein the diameter of the first calender roll is 190-400mm, the length of the first calender roll is 210-340mm, and the diameter of the first calender roll is 210-340mm. The surface finish is 0.4-1.6 μm; the size of the second calender roll is the same as the size of the first calender roll.
A method for manufacturing a special calender roll for pasta products, which is characterized in that it comprises the following steps:

Step 1: Treat the surface of the 1.5-2mm stainless steel plate base material, and grind to ensure the surface finish Ra 1～2μm;

Step 2: Use an abrasive tool to stamp and prepare protrusions on the surface of the substrate, and ensure that the joints between the protrusions and the surface of the substrate are arc-shaped structures;

Step 3: Roll the base material with raised parts into a cylinder with a diameter of 190-400mm and a length of 210-340mm. The joints are welded by laser or electron beam without filler and the welds are ground and polished;

Step 4: Grind the cylinder twice to a surface roughness Ra 0.4～1.6μm, and then perform plasma glow cleaning and chemical vapor deposition in sequence to obtain a calendering roller body, and the calendering roller body is respectively sleeved on the first calendering The outer surface of the cylindrical base of the roller and the second calender roller are fixed in the axial and circumferential directions.
The method for manufacturing a special calender roll for pasta products according to claim 6, characterized in that: in the second step, the stamping conditions include a stretching force of 6000-12000N and a stamping speed of 20-25 times/min.
The method for manufacturing a special calender roll for pasta products according to claim 6, characterized in that: in step 3, the conditions of laser welding include current I=155～165A, pulse width T=4～8ms, frequency f=18～24Hz , Welding speed v=450～500mm/min; The conditions of electron beam welding include high voltage 45～50Kv, beam current 18～30mA, focusing current 1.80～1.9A, linear velocity v=400～500mm/min, vacuum degree <1× 10 -2 Pa.
The method for manufacturing a special calender roll for pasta products according to claim 1, characterized in that: in step 4, the conditions for plasma glow cleaning include a vacuum degree of 1 to 1.5×10 -3 Pa, a gas source of argon, and a voltage 1～2kV; the precursors of the chemical vapor deposition are carbon tetrafluoride and methane, the auxiliary gas is argon, the chemical vapor deposition conditions include a vacuum degree of 0.5 to 1.5 Pa, and the ratio of carbon tetrafluoride and methane mixture is 1 :1～4:1, voltage 0.8～1.5kV, deposition time 30～60min.