A non-disassembly cleaning pad for a coffee grinder based on physical friction and its preparation method

Abstract

This invention discloses a non-disassembly cleaning tablet for coffee grinders based on physical friction, which is formed by compression molding of a composite natural grain main ingredient and biodegradable auxiliary ingredients. The composite natural grain adopts a dual-ratio structure of gradient hardness and gradient particle size. The cleaning tablet is a double-layer structured tablet with an outer layer and an inner layer. This invention also proposes a method for preparing the non-disassembly cleaning tablet for coffee grinders based on physical friction, including the following steps: S1, Raw material pretreatment: The composite natural grain raw material is placed in a drying device, and the drying temperature is controlled at 40-60℃. The tablets prepared by this invention use food-grade natural grains, are free of chemical additives, are biodegradable, and have no residual pollution. The dual-gradient compounding results in a residue removal rate of ≥85%, which is 20%-30% higher than that of single grains.

Description

Technical Field

[0001] This invention relates to the field of coffee grinding equipment cleaning technology, and in particular to a non-disassembly coffee grinder cleaning pad based on physical friction and its preparation method. Background Technology

[0002] Coffee grinders are widely used in coffee making. Their burrs and grinding chamber walls easily accumulate coffee grounds and oils, which, over time, lead to a deterioration in coffee flavor, reduced grinding precision, and accelerated burr corrosion and wear. Existing coffee grinder cleaning methods have the following main drawbacks: Disassembly and cleaning: It requires disassembling the blade and the machine body, which is complicated and time-consuming. In commercial scenarios, it has low efficiency due to high frequency of maintenance, and improper disassembly can easily damage the equipment. Chemical cleaning agents: contain synthetic detergents, preservatives and other chemical components, which can easily remain in the gaps of the blade plate, contaminating coffee drinks, ruining the taste, failing to meet food contact safety requirements, and corroding ceramic / metal blade plates, shortening the life of the equipment; Single grain cleaning: Using only single raw materials such as brown rice and corn, the friction and adsorption forces are poorly matched, the residue removal rate is less than 70%, it cannot handle both stubborn grease cleaning and blade protection, and it has no odor adsorption function. Loose cleaning consumables: Without a compressed forming structure, they are prone to spillage and clogging of the grinding channels during use. They also lack gradient friction and layered cleaning design, making them unsuitable for the diverse cleaning needs of different blade materials and grinding structures.

[0003] In view of the shortcomings of the prior art, the present invention provides a non-disassembly cleaning pad for a coffee grinder based on physical friction and its preparation method. By combining natural grain gradient hardness and gradient particle size and multi-layer structured pressing, it achieves non-disassembly physical friction cleaning, taking into account efficient cleaning, food-grade safety, blade protection and broad compatibility, thus solving the core pain points of the prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a non-disassembly cleaning pad for coffee grinders based on physical friction, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A non-disassembly cleaning pad for a coffee grinder based on physical friction is made from a composite natural grain main ingredient and biodegradable auxiliary ingredients through a pressing process. The compound natural grains adopt a dual ratio structure of gradient hardness and gradient particle size, and the cleaning tablets are double-layered tablets with an outer layer and an inner layer.

[0006] Preferably, the gradient hardness blend, by weight percentage, comprises: 30%-40% high-hardness grains, 40%-50% medium-hardness grains, and 10%-20% low-hardness grains; The high-hardness grain is one or a combination of two of the following: corn grits with a Mohs hardness of 2.5-3.0 and Job's tears with a Mohs hardness of 2.2-2.8, used to crush large pieces of residue in the deep grooves at the root of the crusher disc. The medium-hardness grain is one or a combination of two of the following: brown rice with a Mohs hardness of 1.8-2.2 and buckwheat grains with a Mohs hardness of 2.0-2.5, used to remove medium-adhesive residues from the surface of the blade disc. The low-hardness grain is one or a combination of two of millet with a Mohs hardness of 1.5-1.8 and oat flakes with a Mohs hardness of 1.0-1.5, used to adsorb micro powder, polish the surface of the blade disc and reduce secondary residues.

[0007] Preferably, the gradient particle size blend, by weight percentage, comprises: 50% coarse particles, 30% medium particles, and 20% fine particles; The coarse particles, with a particle size ranging from 1.5 to 3.0 mm, are used to quickly remove coffee oil clumps and stubborn residues. The medium-sized particles have a particle size range of 1.0-1.5mm and are used to fully cover the central area of ​​the cleaning disc. The fine particles have a particle size range of 0.5-1.0 mm and are used to fill the edges and tiny gaps inside the cutter head.

[0008] Preferably, the outer layer of the outer-inner layer structured tablet is a low-hardness fine-particle grain mixture, and the inner layer is a high-hardness coarse-particle grain mixture. The double-layer structure is integrally formed through a tableting process.

[0009] Preferably, the food-grade biodegradable excipients include biodegradable plant gum binders, natural adsorbents, and tableting aids; The biodegradable plant-based adhesive is one or more of corn starch, pregelatinized starch, and xanthan gum, and accounts for ≤5% of the total weight of the cleaning sheets; The natural adsorbent is one of activated carbon powder and diatomaceous earth, and the amount added is 3%-5% of the total weight of the cleaning tablets; The tableting aid is one or more of the following: chitosan, isomaltitol, mannitol, PEG6000, magnesium stearate, and sodium stearoyl fumarate.

[0010] This invention also proposes a method for preparing a non-disassembly cleaning pad for a coffee grinder based on physical friction, comprising the following steps: S1. Raw material pretreatment: Place the compound natural grain raw materials in a drying equipment, control the drying temperature at 40-60℃, and dry until the moisture content is <10%; The dried grains are graded and screened using a multi-layer sieve machine to obtain coarse, medium and fine grains, which are then classified according to the gradient hardness for later use. S2. Ingredient mixing: According to the formula ratio, grain particles with gradient hardness and gradient particle size and food-grade biodegradable auxiliary materials are put into a three-dimensional mixer. The mixing time is 15-20 minutes and the mixing speed is 30-50 r / min to obtain a uniform premix. S3. Multi-layer tableting: A double-layer rotary tableting machine is used. The outer hopper is filled with low-hardness fine-particle premix, and the inner hopper is filled with high-hardness coarse-particle premix. The tableting pressure is controlled at 10-15kN and the tableting speed is 20-30r / min to compress the double-layer structured tablets. S4. Post-processing: Place the compressed tablets in a room temperature environment to cool for 10-15 minutes. After passing the weight, hardness, and appearance quality inspection, seal and package them to obtain the finished grinder cleaning tablets.

[0011] Preferably, the method for preparing a non-disassembly cleaning pad for a coffee grinder based on physical friction according to claim 6 is characterized in that, in the raw material pretreatment step, the grains can be functionally modified by a short-time high-temperature roasting process to improve surface roughness and friction capability. During the multi-layer tableting process, the relative humidity of the tableting environment is controlled at 40%-50%.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The tablets prepared by this invention are made from food-grade natural grains, contain no chemical additives, are biodegradable, and leave no residual pollution. The tablets prepared by this invention employ a dual-gradient compound formulation, achieving a residue removal rate of ≥85%, which is 20%-30% higher than that of single grains. The tablets prepared by this invention utilize gradient friction, resulting in no excessive wear and a roughness change of ≤5%. The tablets prepared by this invention can be used directly without disassembling the device and are compatible with all types of devices. The tablets prepared by this invention can be cleaned and deodorized in one step, and are highly versatile. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0014] Raw material composition: 10% corn grits, 10% Job's tears, 5% buckwheat grains, 10% brown rice, 10% millet, 15% oats, 15% corn starch, 5% chitosan, 5% mannitol, 2% PEG6000, 0.1% magnesium stearate, and 0.2% sodium stearoyl fumarate.

[0015] Preparation steps: The grains are dried to a moisture content of 8% and then sieved to separate into coarse, medium, and fine particles. Mix all ingredients according to the specified ratio and mix for 15 minutes. Double-layer compression, pressure 10kN, tablet density 0.8g / cm³; After cooling and quality inspection, the finished product is obtained. Example

[0016] Raw material composition: 20% corn grits, 10% Job's tears, 5% buckwheat grains, 10% brown rice, 5% millet, 10% oats, 15% pregelatinized starch, 5% chitosan, 3% mannitol, 5% PEG6000, and 5% isomaltitol.

[0017] Preparation steps: The grains are dried to a moisture content of 9% and then graded and sieved. Mix the ingredients for 18 minutes; Double-layer compression, pressure 12kN, tablet density 1.0g / cm³; After cooling and quality inspection, the finished product is obtained. Example

[0018] Raw material composition: 30% corn grits, 10% Job's tears, 5% buckwheat grains, 5% brown rice, 5% millet, 5% oats, 5% eggshell powder, 15% corn starch, 5% chitosan, 5% PEG6000, and 5% isomaltitol.

[0019] Preparation steps: Grains are dried to a moisture content of 7% and then precisely sieved to graded particle sizes. Mix the ingredients for 20 minutes to ensure uniformity; Double-layer compression, pressure 13kN, tablet density 1.1g / cm³; After cooling and quality inspection, the finished product is obtained.

[0020] Applicable scenarios: Household / commercial use, flat blades / conical blades, metal / ceramic blade discs are all compatible. Example

[0021] Raw material composition: 35% corn grits, 5% Job's tears, 5% buckwheat grains, 5% millet, 5% oats, 5% eggshell powder, 15% pregelatinized starch, 5% chitosan, 5% PEG6000, and 5% isomaltitol.

[0022] Preparation steps: The grains are dried to a moisture content of 7.5% and then sieved. Mix the ingredients for 18 minutes; Double-layer compression, pressure 15kN, tablet density 1.2g / cm³; After cooling and quality inspection, the finished product is obtained.

[0023] Applicable scenarios: Commercial flat burr coffee grinders, cleaning crema from dark roast coffee. Example

[0024] Raw material composition: 15% corn grits, 5% Job's tears, 10% buckwheat grains, 5% brown rice, 15% millet, 10% oats, 15% corn starch, 5% chitosan, 3% mannitol, 3% PEG6000, and 4% isomaltitol.

[0025] Preparation steps: The grains are dried to a moisture content of 9% and then sieved. Mix the ingredients for 15 minutes; Double-layer compression, pressure 11kN, tablet density 0.9g / cm³; After cooling and quality inspection, the finished product is obtained.

[0026] The tablets prepared in the above five embodiments were subjected to basic physical property tests, and the test results are shown in the table below:

[0027] The core indicators of the cleaning effect of the tablets prepared in the above five embodiments were tested using the following methods: differential gravimetric method to measure residue removal rate; ultraviolet spectrophotometer to measure oil residue; and roughness tester to measure blade protection. The test results are shown in the table below:

[0028] The tablets prepared in the above five embodiments were subjected to long-term stability testing, including 500 consecutive cleaning cycles. The test results are shown in the table below:

[0029] In summary, Example 3 is the best in five aspects: residue removal rate, grease adsorption, cutter head protection, long-term stability, and adaptability to all scenarios. It has the highest cleaning efficiency, the least cutter head damage, and the best disintegration and usage stability.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A non-disassembly cleaning pad for a coffee grinder based on physical friction, characterized in that, It is made from compound natural grain main ingredients and biodegradable auxiliary materials through a tableting process; The compound natural grains adopt a dual ratio structure of gradient hardness and gradient particle size, and the cleaning tablets are double-layered tablets with an outer layer and an inner layer.

2. The non-disassembly cleaning pad for a coffee grinder based on physical friction according to claim 1, characterized in that, The gradient hardness blend is calculated by weight percentage as follows: high-hardness grains account for 30%-40%, medium-hardness grains account for 40%-50%, and low-hardness grains account for 10%-20%. The high-hardness grain is one or a combination of two of the following: corn grits with a Mohs hardness of 2.5-3.0 and Job's tears with a Mohs hardness of 2.2-2.8, used to crush large pieces of residue in the deep grooves at the root of the crusher disc. The medium-hardness grain is one or a combination of two of the following: brown rice with a Mohs hardness of 1.8-2.2 and buckwheat grains with a Mohs hardness of 2.0-2.5, used to remove medium-adhesive residues from the surface of the cutter disc. The low-hardness grain is one or a combination of two of millet with a Mohs hardness of 1.5-1.8 and oat flakes with a Mohs hardness of 1.0-1.5, used to adsorb micro powder, polish the surface of the blade disc and reduce secondary residues.

3. The non-disassembly cleaning pad for a coffee grinder based on physical friction according to claim 2, characterized in that, The gradient particle size blend, by weight percentage, consists of 50% coarse particles, 30% medium particles, and 20% fine particles. The coarse particles, with a particle size ranging from 1.5 to 3.0 mm, are used to quickly remove coffee oil clumps and stubborn residues. The medium-sized particles have a particle size range of 1.0-1.5mm and are used to fully cover the central area of ​​the cleaning disc. The fine particles have a particle size range of 0.5-1.0 mm and are used to fill the edges and tiny gaps inside the cutter head.

4. The non-disassembly cleaning pad for a coffee grinder based on physical friction according to claim 3, characterized in that, The outer layer of the outer-inner layer structured tablet is a mixture of low-hardness fine-particle grains, and the inner layer is a mixture of high-hardness coarse-particle grains. The double-layer structure is integrally formed through a tableting process.

5. A non-disassembly cleaning pad for a coffee grinder based on physical friction according to claim 4, characterized in that, The food-grade biodegradable excipients include biodegradable plant gum binders, natural adsorbents, and tableting aids; The biodegradable plant-based adhesive is one or more of corn starch, pregelatinized starch, and xanthan gum, and accounts for ≤5% of the total weight of the cleaning sheets; The natural adsorbent is one of activated carbon powder and diatomaceous earth, and the amount added is 3%-5% of the total weight of the cleaning tablets; The tableting aid is one or more of the following: chitosan, isomaltitol, mannitol, PEG6000, magnesium stearate, and sodium stearoyl fumarate.

6. A method for preparing a non-disassembly cleaning pad for a coffee grinder based on physical friction, characterized in that, Includes the following steps: S1. Raw material pretreatment: Place the compound natural grain raw materials in a drying equipment, control the drying temperature at 40-60℃, and dry until the moisture content is <10%; The dried grains are graded and screened using a multi-layer sieve machine to obtain coarse, medium and fine grains, which are then classified according to the gradient hardness for later use. S2. Ingredient mixing: According to the formula ratio, grain particles with gradient hardness and gradient particle size and food-grade biodegradable auxiliary materials are put into a three-dimensional mixer. The mixing time is 15-20 minutes and the mixing speed is 30-50 r / min to obtain a uniform premix. S3. Multi-layer tableting: A double-layer rotary tableting machine is used. The outer hopper is filled with low-hardness fine-particle premix, and the inner hopper is filled with high-hardness coarse-particle premix. The tableting pressure is controlled at 10-15kN and the tableting speed is 20-30r / min to compress the double-layer structured tablets. S4. Post-processing: Place the compressed tablets in a room temperature environment to cool for 10-15 minutes. After passing the weight, hardness, and appearance quality inspection, seal and package them to obtain the finished grinder cleaning tablets.

7. The method for preparing a non-disassembly cleaning pad for a coffee grinder based on physical friction according to claim 6, characterized in that, In the raw material pretreatment step, grains can be functionally modified using a short-time high-temperature baking process to improve surface roughness and friction resistance. During the multi-layer tableting process, the relative humidity of the tableting environment is controlled at 40%-50%.

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