Production process of environment-friendly cup bottom support based on corn straw paper pulp

Abstract

The environment-friendly cup bottom support production process comprises the following steps that A, corn straw is treated through a double-shaft shear type crusher and crushed into 5-10 mm broken sections, it is ensured that follow-up alkali liquor permeates uniformly, impurities (such as silt and broken leaves) are removed through a cyclone separator after crushing, the impurity removal rate is larger than or equal to 98%, a 5% sodium hydroxide (NaOH) solution is adopted, and the raw materials are recycled; the temperature is controlled to be 60 + / -2 DEG C, the soaking time is 2 hours, lignin is dissolved, fibers are softened, the soaked straw fragments are washed three times with clear water until the pH value is reduced to 7.0-7.5, and the situation that the subsequent process is affected by residual alkaline substances is avoided. The corn straw paper pulp is adopted for preparing the cup bottom support, use of plastic or common paper pulp materials is reduced, and therefore the environment-friendly effect can be improved, straw fibers are fully crosslinked through the mechanical-ultrasonic synergistic dispersion technology, the curing time is compressed to 30 seconds through the infrared-negative pressure combined drying technology, dynamic pressure control is matched, and the environment-friendly effect is achieved. And the forming period can be shortened.

Description

Technical Field

[0001] The invention relates to the technical field of cup base production, and in particular to an environmentally friendly cup base production process based on corn straw pulp. Background Art

[0002] A cup base usually refers to an accessory or device used to support and fix the bottom of a cup. When the cup contains hot water or hot drinks, the cup base can act as a heat insulator, preventing the heat of the cup from being directly transferred to a flat surface such as a table, thereby preventing burns on the table. It also makes it easier for people to pick up the cup and avoids direct contact of their hands with the overheated cup bottom. However, the current manufacturing of cup bases mainly relies on plastic or ordinary pulp materials, resulting in insufficient environmental friendliness. To this end, we propose an environmentally friendly cup base production process based on corn straw pulp. Summary of the Invention

[0003] The purpose of the present invention is to provide an environmentally friendly cup base production process based on corn straw pulp, which has the advantage of good environmental protection effect and solves the problem that the current cup base manufacturing mainly relies on plastic or ordinary pulp materials, resulting in insufficient environmental protection.

[0004] To achieve the above object, the present invention provides the following technical solution: a production process for an environmentally friendly cup base based on corn straw pulp, comprising the following steps:

[0005] A. Corn stalks are processed in a double-shaft shearing crusher and crushed into 5-10 mm fragments to ensure uniform penetration of the subsequent alkali solution. After crushing, impurities (such as sediment and broken leaves) are removed through a cyclone separator with an impurity removal rate of ≥98%. A 5% sodium hydroxide (NaOH) solution is used at a temperature of 60±2°C for 2 hours to dissolve lignin and soften the fibers. After soaking, the stalk fragments are rinsed with clean water three times until the pH value drops to 7.0-7.5 to prevent residual alkaline substances from affecting subsequent processes. After washing, the stalk fragments are passed through a vibrating screen (pore size 3mm) to separate the fibers that have not been fully softened.

[0006] B. Place the crushed corn stalks into a stirring device at a speed of 3000 rpm for 15 minutes, then pump the qualified slurry into a homogenizing tank and stir at a low speed (200 rpm) for 30 minutes to eliminate fiber sedimentation and stratification;

[0007] C. Before closing the mold, preheat the electric heater to 80°C for 5 minutes to prevent the slurry from contacting the cold mold and causing a rough surface. Use a screw-type metering pump to inject corn straw pulp into the mold. The single injection volume error is ±1% and the injection speed is 50mL / s to ensure uniform filling of the cavity. After molding, the mold is opened and the robotic arm (suction cup type) transfers the cup holder to the curing module. The transfer time is ≤5 seconds.

[0008] D. Then it is subjected to infrared radiation drying. The radiation parameters of infrared radiation drying are: carbon fiber infrared plate wavelength 3μm, power density 10W / cm 2 , radiation distance 10cm, curing time 30 seconds, then negative pressure adsorption strengthening, negative pressure channel vacuum degree -0.08MPa, air flow speed 2m / s, accelerate water evaporation, avoid surface cracking, spray waterproofing agent after molding, electrostatic spraying process, spray food grade hydrophobic agent (fluoropolymer), coating thickness 10-15μm, contact angle ≥110°;

[0009] E. Perform ultrasonic trimming on the formed cup base. Cutting parameters: ultrasonic knife frequency 28kHz, amplitude 30μm, cutting speed 10mm / s, edge smoothness Ra ≤ 3.2μm. The scraps are collected by a negative pressure suction nozzle, crushed and reused in the fiber dispersion process.

[0010] F. Send the trimmed cup base to visual quality inspection. Scan it with a high-resolution CCD camera (5 million pixels), and then use a laser rangefinder to measure the cup base diameter and thickness.

[0011] G. The finished product is then sterilized by UV-C ultraviolet light (wavelength 253.7nm, irradiation intensity 10mJ / cm 2 ), and then put into storage after sterile packaging.

[0012] Preferably, the stirring device includes a base plate, the right end of the top of the base plate is fixedly connected to a filter box, the inner cavity of the filter box is provided with a filter screen, the top of the filter box is fixedly connected to a stirring barrel, the top of the stirring barrel is provided with a barrel cover, the middle end of the top of the barrel cover is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a stirring rod, the stirring rod extends to the inner cavity of the stirring barrel, the bottom of the inner cavity of the stirring barrel is fixedly connected to an ultrasonic generator, the left end of the top of the base plate is fixedly connected to a water tank, the lower part of the right side of the inner cavity of the water tank is fixedly connected to a pump, the water outlet of the pump is fixedly connected to a hose, and the other end of the hose is fixedly connected to the top of the barrel cover.

[0013] Preferably, a liquid level sensor is fixedly connected to the bottom of the water tank cavity, a box door is provided on the back of the filter box and directly behind the filter screen, and a material guide pipe is fixedly connected to the bottom of the right side of the filter box cavity.

[0014] Preferably, grooves are provided at both left and right ends of the top of the inner cavity of the filter box, and a rangefinder is fixedly connected to the inner cavity of the groove.

[0015] Preferably, a feed port is provided at the right end of the top of the barrel cover, and the top of the feed port is movably connected to a cover plate via a hinge.

[0016] Preferably, a water inlet is provided at the left end of the top of the water tank, and a threaded cover is provided on the top of the water inlet.

[0017] Preferably, a discharge port is provided between the bottom of the mixing barrel and the filter box, and an inner cavity of the discharge port is provided with a solenoid valve.

[0018] Preferably, a display is fixedly connected to the upper part of the front surface of the water tank, and the input end of the display is electrically connected to the output ends of the rangefinder and the liquid level sensor.

[0019] Preferably, a PLC controller is fixedly connected to the lower part of the front surface of the water tank, and the output end of the PLC controller is electrically connected to the output ends of the motor, ultrasonic generator, solenoid valve and pump.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention adopts corn straw pulp to prepare the cup base, thereby reducing the use of plastic or ordinary pulp materials, thereby improving environmental protection effects.

[0022] 2. The present invention uses mechanical-ultrasonic synergistic dispersion technology to fully cross-link the straw fibers, and uses infrared-negative pressure combined drying technology to compress the curing time to 30 seconds. Combined with dynamic pressure control, the molding cycle can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the stirring device of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the mixing barrel of the present invention;

[0025] Figure 3 It is a schematic diagram of the main cross-sectional structure of the base plate of the present invention.

[0026] In the figure: 1. Base plate; 2. Filter box; 3. Water tank; 4. PLC controller; 5. Display; 6. Water inlet; 7. Hose; 8. Barrel cover; 9. Motor; 10. Feed inlet; 11. Cover; 12. Stirring rod; 13. Ultrasonic generator; 14. Discharge port; 15. Solenoid valve; 16. Filter screen; 17. Feed guide pipe; 18. Groove; 19. Distance meter; 20. Pump; 21. Liquid level sensor; 22. Mixing barrel. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0029] Example:

[0030] See also Figure 1-3 As shown, the present invention provides a production process for an environmentally friendly cup base based on corn straw pulp, comprising the following steps:

[0031] A. Corn stalks are processed in a double-shaft shearing crusher and crushed into 5-10 mm fragments to ensure uniform penetration of the subsequent alkali solution. After crushing, impurities (such as sediment and broken leaves) are removed through a cyclone separator with an impurity removal rate of ≥98%. A 5% sodium hydroxide (NaOH) solution is used at a temperature of 60±2°C for 2 hours to dissolve lignin and soften the fibers. After soaking, the stalk fragments are rinsed with clean water three times until the pH value drops to 7.0-7.5 to prevent residual alkaline substances from affecting subsequent processes. After washing, the stalk fragments are passed through a vibrating screen (pore size 3mm) to separate the fibers that have not been fully softened.

[0032] B. Place the crushed corn stalks into a stirring device at a speed of 3000 rpm for 15 minutes, then pump the qualified slurry into a homogenizing tank and stir at a low speed (200 rpm) for 30 minutes to eliminate fiber sedimentation and stratification;

[0033] C. Before closing the mold, preheat the electric heater to 80°C for 5 minutes to prevent the slurry from contacting the cold mold and causing a rough surface. Use a screw-type metering pump to inject corn straw pulp into the mold. The single injection volume error is ±1% and the injection speed is 50mL / s to ensure uniform filling of the cavity. After molding, the mold is opened and the robotic arm (suction cup type) transfers the cup holder to the curing module. The transfer time is ≤5 seconds.

[0034] D. Then it is subjected to infrared radiation drying. The radiation parameters of infrared radiation drying are: carbon fiber infrared plate wavelength 3μm, power density 10W / cm 2, radiation distance 10cm, curing time 30 seconds, then negative pressure adsorption strengthening, negative pressure channel vacuum degree -0.08MPa, air flow speed 2m / s, accelerate water evaporation, avoid surface cracking, spray waterproofing agent after molding, electrostatic spraying process, spray food grade hydrophobic agent (fluoropolymer), coating thickness 10-15μm, contact angle ≥110°;

[0035] E. Perform ultrasonic trimming on the formed cup base. Cutting parameters: ultrasonic knife frequency 28kHz, amplitude 30μm, cutting speed 10mm / s, edge smoothness Ra ≤ 3.2μm. The scraps are collected by a negative pressure suction nozzle, crushed and reused in the fiber dispersion process.

[0036] F. Send the trimmed cup base to visual quality inspection. Scan it with a high-resolution CCD camera (5 million pixels), and then use a laser rangefinder to measure the cup base diameter and thickness.

[0037] G. The finished product is then sterilized by UV-C ultraviolet light (wavelength 253.7nm, irradiation intensity 10mJ / cm 2 ), after aseptic packaging, it is put into storage, and the cup base is made of corn straw pulp to reduce the use of plastic or ordinary pulp materials, thereby improving the environmental protection effect. The straw fiber is fully cross-linked through mechanical-ultrasonic collaborative dispersion technology, and the infrared-negative pressure combined drying technology is used to compress the curing time to 30 seconds. Combined with dynamic pressure control, the molding cycle can be shortened.

[0038] The stirring device includes a bottom plate 1, a filter box 2 is fixedly connected to the right end of the top of the bottom plate 1, a filter screen 16 is provided in the inner cavity of the filter box 2, a stirring barrel 22 is fixedly connected to the top of the filter box 2, a barrel cover 8 is provided on the top of the stirring barrel 22, a motor 9 is fixedly connected to the middle end of the top of the barrel cover 8, a stirring rod 12 is fixedly connected to the output shaft of the motor 9, the stirring rod 12 extends to the inner cavity of the stirring barrel 22, an ultrasonic generator 13 is fixedly connected to the bottom of the inner cavity of the stirring barrel 22, a water tank 3 is fixedly connected to the left end of the top of the bottom plate 1, a pump 20 is fixedly connected to the lower right side of the inner cavity of the water tank 3, and the pump The water outlet of 20 is fixedly connected with a hose 7, and the other end of the hose 7 is fixedly connected to the top of the barrel cover 8. The bottom of the inner cavity of the water tank 3 is fixedly connected with a liquid level sensor 21. A box door is provided on the back of the filter box 2 and directly behind the filter screen 16. The bottom of the right side of the inner cavity of the filter box 2 is fixedly connected with a guide pipe 17. The left and right ends of the top of the inner cavity of the filter box 2 are provided with grooves 18. The inner cavity of the groove 18 is fixedly connected with a rangefinder 19. The right end of the top of the barrel cover 8 is provided with a feed port 10. The top of the feed port 10 is movably connected to a cover plate 11 through a hinge. The left end of the top of the water tank 3 is provided with a A water inlet 6 is provided with a threaded cover on the top of the water inlet 6. A discharge port 14 is provided between the bottom of the mixing barrel 22 and the filter box 2. A solenoid valve 15 is provided in the inner cavity of the discharge port 14. A display 5 is fixedly connected to the upper part of the front of the water tank 3. The input end of the display 5 is electrically connected to the output end of the rangefinder 19 and the liquid level sensor 21. A PLC controller 4 is fixedly connected to the lower part of the front of the water tank 3. The output end of the PLC controller 4 is electrically connected to the output end of the motor 9, the ultrasonic generator 13, the solenoid valve 15 and the pump 20. The motor 9 can drive the stirring rod 12 to rotate. In this way, the straw raw material can be stirred, and then the ultrasonic generator 13 is turned on. The cavitation effect will further disperse the fiber bundles to ensure the uniformity of the slurry. Then the solenoid valve 15 is opened, and the slurry can be filtered using the filter 16. The coarser fibers will remain on the top of the filter 16. The rangefinder 19 can be used to measure the thickness of the coarser fibers on the filter 16. When the thickness is high, the filter 16 is removed for cleaning, which makes it convenient for people to clean the filter 16 in time. After stirring, the pump 20 is turned on, and the water in the water tank 3 is sent into the mixing barrel 22 to facilitate subsequent cleaning.

[0039] The working principle of the present invention is: corn straw pulp is used to prepare the cup bottom, reducing the use of plastic or ordinary pulp materials, thereby improving the environmental protection effect, through mechanical-ultrasonic collaborative dispersion technology, the straw fibers are fully cross-linked, and the infrared-negative pressure combined drying technology is used to compress the curing time to 30 seconds. Combined with dynamic pressure control, the molding cycle can be shortened, and the motor 9 can drive the stirring rod 12 to rotate, so that the straw raw material can be stirred, and then the ultrasonic generator 13 is turned on, the cavitation effect will further disperse the fiber bundles to ensure the uniformity of the slurry, and then the solenoid valve 15 is opened, and the slurry can be filtered using the filter 16. The coarser fibers will remain on the top of the filter 16, and the rangefinder 19 can be used to measure the thickness of the coarser fibers on the filter 16. When the thickness is high, the filter 16 is removed for cleaning, which is convenient for people to clean the filter 16 in time. After stirring, the pump 20 is turned on and the water in the water tank 3 is sent into the mixing barrel 22 for subsequent cleaning.

[0040] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0041] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A process for producing an environmentally friendly cup base based on corn straw pulp, characterized by: The following steps are involved: A. Corn stalks are processed in a double-shaft shearing crusher and crushed into 5-10 mm fragments to ensure uniform penetration of the subsequent alkali solution. After crushing, impurities (such as sediment and broken leaves) are removed through a cyclone separator with an impurity removal rate of ≥98%. A 5% sodium hydroxide (NaOH) solution is used at a temperature of 60±2°C for 2 hours to dissolve lignin and soften the fibers. After soaking, the stalk fragments are rinsed with clean water three times until the pH value drops to 7.0-7.5 to prevent residual alkaline substances from affecting subsequent processes. After washing, the stalk fragments are passed through a vibrating screen (pore size 3mm) to separate the fibers that have not been fully softened. B. Place the crushed corn stalks into a stirring device at a speed of 3000 rpm for 15 minutes, then pump the qualified slurry into a homogenizing tank and stir at a low speed (200 rpm) for 30 minutes to eliminate fiber sedimentation and stratification; C. Before closing the mold, preheat the electric heater to 80°C for 5 minutes to prevent the slurry from contacting the cold mold and causing a rough surface. Use a screw-type metering pump to inject corn straw pulp into the mold. The single injection volume error is ±1% and the injection speed is 50mL / s to ensure uniform filling of the cavity. After molding, the mold is opened and the robotic arm (suction cup type) transfers the cup holder to the curing module. The transfer time is ≤5 seconds. D. Then it is subjected to infrared radiation drying. The radiation parameters of infrared radiation drying are: carbon fiber infrared plate wavelength 3μm, power density 10W / cm 2 , radiation distance 10cm, curing time 30 seconds, then negative pressure adsorption strengthening, negative pressure channel vacuum degree -0.08MPa, air flow speed 2m / s, accelerate water evaporation, avoid surface cracking, spray waterproofing agent after molding, electrostatic spraying process, spray food grade hydrophobic agent (fluoropolymer), coating thickness 10-15μm, contact angle ≥110°; E. Perform ultrasonic trimming on the formed cup base. Cutting parameters: ultrasonic knife frequency 28kHz, amplitude 30μm, cutting speed 10mm / s, edge smoothness Ra ≤ 3.2μm. The scraps are collected by a negative pressure suction nozzle, crushed and reused in the fiber dispersion process. F. Send the trimmed cup base to visual quality inspection. Scan it with a high-resolution CCD camera (5 million pixels), and then use a laser rangefinder to measure the cup base diameter and thickness. G. The finished product is then sterilized by UV-C ultraviolet light (wavelength 253.7nm, irradiation intensity 10mJ / cm 2 ), and then put into storage after sterile packaging.

2. The process for producing an environmentally friendly cup base based on corn straw pulp according to claim 1, characterized in that: The stirring device comprises a bottom plate (1), a filter box (2) is fixedly connected to the right end of the top of the bottom plate (1), the inner cavity of the filter box (2) is provided with a filter screen (16), a stirring barrel (22) is fixedly connected to the top of the filter box (2), a barrel cover (8) is provided on the top of the stirring barrel (22), a motor (9) is fixedly connected to the middle end of the top of the barrel cover (8), an output shaft of the motor (9) is fixedly connected to a stirring rod (12), the stirring rod (12) extends to the inner cavity of the stirring barrel (22), an ultrasonic generator (13) is fixedly connected to the bottom of the inner cavity of the stirring barrel (22), a water tank (3) is fixedly connected to the left end of the top of the bottom plate (1), a pump (20) is fixedly connected to the lower part of the right side of the inner cavity of the water tank (3), a hose (7) is fixedly connected to the water outlet of the pump (20), and the other end of the hose (7) is fixedly connected to the top of the barrel cover (8).

3. The process for producing an environmentally friendly cup base based on corn straw pulp according to claim 2, characterized in that: A liquid level sensor (21) is fixedly connected to the bottom of the inner cavity of the water tank (3), a box door is provided on the back of the filter box (2) and directly behind the filter screen (16), and a material guide pipe (17) is fixedly connected to the bottom of the right side of the inner cavity of the filter box (2).

4. The process for producing an environmentally friendly cup base based on corn straw pulp according to claim 2, characterized in that: Grooves (18) are provided at both left and right ends of the top of the inner cavity of the filter box (2), and a distance meter (19) is fixedly connected to the inner cavity of the groove (18).

5. The process for producing an environmentally friendly cup base based on corn straw pulp according to claim 2, characterized in that: A feed port (10) is provided at the right end of the top of the barrel cover (8), and a cover plate (11) is movably connected to the top of the feed port (10) via a hinge.

6. The process for producing an environmentally friendly cup base based on corn straw pulp according to claim 2, characterized in that: A water inlet (6) is provided at the left end of the top of the water tank (3), and a threaded cover is provided at the top of the water inlet (6).

7. The process for producing an environmentally friendly cup base based on corn straw pulp according to claim 2, characterized in that: A discharge port (14) is provided between the bottom of the mixing barrel (22) and the filter box (2), and a solenoid valve (15) is provided in the inner cavity of the discharge port (14).

8. The process for producing an environmentally friendly cup base based on corn straw pulp according to claim 2, characterized in that: A display (5) is fixedly connected to the upper portion of the front face of the water tank (3), and an input end of the display (5) is electrically connected to the output ends of the rangefinder (19) and the liquid level sensor (21).

9. The process for producing an environmentally friendly cup base based on corn straw pulp according to claim 2, characterized in that: A PLC controller (4) is fixedly connected to the lower portion of the front face of the water tank (3), and an output end of the PLC controller (4) is electrically connected to output ends of the motor (9), the ultrasonic generator (13), the solenoid valve (15), and the pump (20).

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