Foam cleaning method and foam preparation method

Abstract

The invention provides a foam cleaning method and a foam preparation method, and relates to the technical field of foam cleaning. The foam cleaning method comprises the following steps: cleaning foam to be cleaned; the cleaned foam is subjected to rinsing treatment; the rinsed foam is subjected to dehydration treatment; the dehydrated foam is dried, so that attachments on the surface and in the foam are removed, the foam is cleaned, stains such as particulate matters, a release agent and grease are not left on the surface and in pores of the foam, the cleanliness of the foam is improved, and the foam is prevented from being damaged. Therefore, the phenomenon that the appearance of a product is affected due to the fact that migration stains appear on the surface of the foam in the environments such as transportation vibration and humidity is avoided to a certain extent, pollution to the product due to the migration stains is avoided, the use performance of the foam is improved, the phenomenon that customers make complaints and complaints is avoided, and the use experience of the customers is improved.

Description

Technical Field

[0001] This application relates to the technical field of foam cleaning, and particularly to a foam cleaning method and a foam preparation method. Background Art

[0002] Foam is a soft porous material composed of a large number of bubble structures. It is usually made of polymer materials, such as polystyrene, polyurethane, polyethylene, etc., through a chemical foaming process. Foam has a porous structure. Foam has the advantages of low density, good elasticity, shock absorption, sound insulation, heat insulation, compressibility, etc., and is widely used in the packaging industry. For example, products such as battery cells and modules usually use foam as product packaging.

[0003] During the production of foam, due to the foaming process, it is easy for stains such as particulate matter, mold release agents, and grease to remain inside the pores. In related technologies, in environments such as transportation vibration and humidity, the stains inside the pores of the foam are likely to migrate to the surface, which not only affects the product appearance, but may even contaminate the product, reducing the performance of the foam and causing customer complaints. Summary of the Invention

[0004] This application provides a foam cleaning method and a foam preparation method to solve the problem that stains inside the pores of the foam migrate to the surface in environments such as transportation vibration and humidity, affecting the product appearance and contaminating the product, and improving the performance of the foam and the customer experience.

[0005] In a first aspect, this application provides a foam cleaning method, including:

[0006] Performing a cleaning treatment on the foam to be cleaned;

[0007] Performing a rinsing treatment on the foam after the cleaning is completed;

[0008] Performing a dehydration treatment on the foam after the rinsing is completed;

[0009] Performing a drying treatment on the foam after the dehydration is completed.

[0010] The foam cleaning method provided by the present application first cleans the foam to be cleaned, then rinses the cleaned foam, then dehydrates the rinsed foam, and finally dries the dehydrated foam. That is to say, the foam to be cleaned is sequentially cleaned, rinsed, dehydrated and dried to remove the attachments on the surface and inside of the foam, thereby achieving the cleaning operation of the foam. For example, after the foam is formed, it is sequentially cleaned, rinsed, dehydrated and dried to remove the attachments on the surface and inside of the formed foam. In this way, no particles, release agents, grease and other stains will remain on the surface and inside the pores of the foam, thereby improving the cleanliness of the foam itself, thereby avoiding to a certain extent the phenomenon of migration of stains on the surface of the foam in transportation vibration, humidity and other environments that affects the appearance of the product, and will not cause pollution to the product due to migration stains, thereby improving the performance of the foam, avoiding customer complaints and improving the customer experience.

[0011] In a possible design, the step of cleaning the foam to be cleaned includes:

[0012] placing the foam to be cleaned into a cleaning device;

[0013] injecting a cleaning medium into the cleaning device;

[0014] The foam is cleaned by the cleaning device.

[0015] Through the above scheme, the foam to be cleaned is placed in the cleaning device, and the cleaning medium is injected into the cleaning device, and then the cleaning device is started. The foam can be cleaned by the cleaning device, thereby realizing automatic cleaning of the foam, with high cleaning efficiency, simple operation, and convenient use, which is convenient for cleaning the foam.

[0016] In a possible design, the cleaning medium includes a cleaning liquid.

[0017] Through the above scheme, by making the cleaning medium include water and cleaning liquid, water and cleaning liquid form a mixed solution, the surfactant in the cleaning liquid can reduce the surface tension of the mixed solution to form rich foam, and these foams can wrap up residual particles, release agents, grease and other stains, so that the stains are washed away, thereby improving the cleaning efficiency.

[0018] In a possible design, the cleaning solution includes deionized water.

[0019] Through the above solution, the cleaning liquid includes deionized water. By removing ionic impurity components in the water, the reaction between the surfactant in the cleaning liquid and the hardness ions in the water quality is reduced, thereby avoiding the formation of difficult-to-clean precipitates, ensuring that the cleaning liquid can function more fully, and making it easier to penetrate into the pores of the foam. As a result, the deionized water is more efficient and gentle in removing stains from the foam, especially suitable for removing stubborn stains remaining inside the pores of the foam, further improving the cleaning effect and cleaning efficiency. Moreover, the deionized water will not corrode the foam, that is, it will not damage the performance of the foam, ensuring the stable performance of the foam after cleaning and avoiding customer complaints. At the same time, using deionized water will not cause environmental pollution and plays a certain role in environmental protection.

[0020] The resistivity of the deionized water is greater than or equal to 15 MΩ·cm.

[0021] Through the above solution, the resistivity of the deionized water is greater than or equal to 15 MΩ·cm, that is, the resistivity of the deionized water is not less than 15 MΩ·cm. In this way, the resistivity of the deionized water is relatively high and the conductivity is relatively small, and the effect of removing stains such as particulate matter, mold release agents, and grease is better, further avoiding residual stains in the foam and making the cleaning effect of the foam better. At the same time, it further ensures that the foam will not be corroded, making the performance of the foam more stable after cleaning and helping to extend the service life of the foam.

[0022] In a possible design, the cleaning liquid includes a weak acidic solution with a preset pH value;

[0023] The weak acidic solution is mixed by deionized water, organic acid, and nonionic surfactant. Among them, the mixing ratios of the deionized water, the organic acid, and the nonionic surfactant are 95%-97%, 1%-3%, and 0.5%-1%.

[0024] Through the above solution, the cleaning liquid is a weak acidic solution. Such a weak acidic environment can neutralize and remove alkaline substances or metal ions adsorbed by the foam, and can also inhibit the growth of microorganisms, improving the cleaning effect on the foam. And the acidic condition can decompose the water scale formed by hard water, such as calcium carbonate, magnesium salts, etc., avoiding clogging the pores of the foam, helping to extend the service life of the foam; it also avoids fiber breakage or elastic loss of the foam, maintaining the structural stability of the foam, making the performance of the foam stable after cleaning, and further extending the service life of the foam.

[0025] In a possible design, before the step of rinsing the foam after cleaning is completed, the foam cleaning method further includes:

[0026] Neutralizing the foam after cleaning is completed;

[0027] The neutralization treatment of the cleaned foam includes:

[0028] Neutralizing the cleaned foam with a neutralizing agent for a first preset time.

[0029] Through the above solution, using a neutralizing agent to neutralize the foam cleaned with a weak acid solution for a certain period of time can neutralize the residual acidity, thereby further avoiding the phenomenon of the foam being corroded, making the structure of the foam more stable and having a longer service life.

[0030] In a possible design, the cleaning device includes an ultrasonic cleaner.

[0031] Through the above solution, using an ultrasonic cleaner to clean the foam is not only simple in structure and easy to implement, but also the ultrasonic cleaner utilizes the cavitation effect, acceleration effect and jet effect of ultrasonic waves in the liquid, can penetrate into the fine gaps and holes of the foam, and thoroughly remove stains such as particulate matter, mold release agent, and grease, ensuring the cleaning effect. At the same time, the ultrasonic cleaner will not cause mechanical wear and chemical corrosion to the foam, maintaining the integrity and performance of the foam.

[0032] And / or, the power density of the cleaning device is 0.5 - 1.2 W / cm 2 .

[0033] Through the above solution, making the power density of the cleaning device be 0.5 - 1.2 W / cm 2 , that is, the power density of the cleaning device is relatively large, which can ensure that the ultrasonic energy fully acts on the cleaning medium, generating sufficient cavitation effect and micro-jet, so as to effectively remove the stains on the surface and inside the pores of the foam, improving the cleaning effect.

[0034] And / or, the frequency of the cleaning device switches between a first preset frequency and a second preset frequency.

[0035] Through the above solution, making the frequency of the cleaning device switch between a first preset frequency and a second preset frequency, for example, alternating between low frequency and high frequency. In this way, the cavitation bubbles of the cleaning device at low frequency ultrasonic waves are thick and have high compressive strength, and have a good cleaning effect on stubborn stains attached to the surface of the foam; the cavitation bubbles of the cleaning device at high frequency ultrasonic waves are delicate and have strong penetration ability, and have a good cleaning effect on the stains inside the pores of the foam. Therefore, by switching the cleaning device between different frequencies, the stains on the foam can be removed more effectively, improving the cleaning quality and cleaning efficiency.

[0036] And / or, the cleaning device performs a second preset time of cleaning treatment on the foam to be cleaned at a first preset temperature.

[0037] Through the above solution, the foam to be cleaned is kept in the cleaning equipment for a certain period of time for cleaning, which ensures that the foam can be fully cleaned in the cleaning equipment and the cleaning effect of the foam is better. At the same time, when the foam is being cleaned in the cleaning equipment, the washing temperature in the cleaning equipment is the first preset temperature, which can effectively soften the stains, promote the dissolution of the stains, and enhance the cleaning effect of the foam.

[0038] In a possible design, the rinsing liquid used in the rinsing process of the foam after cleaning includes deionized water.

[0039] Through the above solution, a rinsing liquid, such as deionized water, is used to rinse the foam after cleaning, which can utilize the power of the water flow to more effectively wash away the residual stains on the foam and the stains shed during the cleaning process, ensuring the cleanliness of the foam and avoiding secondary pollution.

[0040] In a possible design, the steps of rinsing the foam after cleaning include:

[0041] Put the foam after cleaning into the rinsing liquid for soaking treatment, where the soaking time is not more than the third preset time;

[0042] Rinse the foam after soaking is completed.

[0043] Through the above solution, the foam after cleaning is first put into the rinsing liquid for soaking treatment for a certain period of time, and then the foam after soaking is rinsed. The soaking process prolongs the reaction time, allowing the rinsing liquid to have more time to react with the stains, so as to more thoroughly remove the stains on the foam, especially the stubborn stains inside the pores of the foam, improving the cleaning effect. At the same time, the soaked foam is easier to remove the residual stains and rinsing liquid during rinsing, which can save time and water resources.

[0044] In a possible design, the foam after rinsing is put into a dehydration device, and the foam is dehydrated at a preset speed for the fourth preset time.

[0045] Through the above solution, the foam after rinsing is put into a dehydration device and dehydrated at a preset speed for a certain period of time, reducing the water content of the foam. This can not only improve the subsequent drying speed, making the cleaning efficiency of the foam higher, but also prevent the foam from mildewing or deforming, with stable performance. In addition, the foam has stable performance after dehydration and is not easily affected by environmental humidity, thus ensuring the product quality.

[0046] In a possible design, the steps of drying the foam after dehydration include:

[0047] Perform a drying treatment on the foam that has completed dehydration;

[0048] And / or, perform an air-drying treatment on the foam that has completed dehydration.

[0049] Through the above solution, performing a drying treatment and / or an air-drying treatment on the dehydrated foam can cause the excess water in the foam to evaporate quickly, shorten the drying treatment time, have a high drying efficiency, be conducive to improving the cleaning efficiency of the foam, and facilitate the transportation and storage of the foam. In addition, during the drying and air-drying processes of the foam, its physical properties are improved, such as reducing expansion and deformation, making the foam more stable and durable.

[0050] In a possible design, when the step of performing a drying treatment on the foam that has completed dehydration includes performing a drying treatment on the foam that has completed dehydration, the performing a drying treatment on the foam that has completed dehydration includes: placing the foam in a drying chamber and performing a drying treatment on the foam for a fifth preset time at a second preset temperature;

[0051] Through the above solution, placing the foam in a drying chamber and performing a drying treatment for a certain time at a second preset temperature, so that the drying chamber can provide uniform temperature and humidity control, can quickly and effectively dry the foam, shorten the drying time, improve the cleaning efficiency of the foam, and using the drying chamber to perform a drying treatment on the foam can also avoid quality problems of the foam caused by uneven temperature or excessive humidity, ensuring the stable performance of the foam. In addition, the drying chamber is usually of a closed design, which can reduce heat loss, improve energy utilization efficiency, and save energy consumption.

[0052] And / or, when the step of performing a drying treatment on the foam that has completed dehydration includes performing an air-drying treatment on the foam that has completed dehydration, the performing an air-drying treatment on the foam that has completed dehydration includes: placing the foam in a clean room and performing an air-drying treatment on the foam for a sixth preset time at a third preset temperature and a preset humidity.

[0053] Through the above solution, placing the foam in a clean room and air-drying it for a certain time at a third preset temperature can effectively prevent the foam from being contaminated or damaged during the air-drying process, ensure that the quality and performance of the foam are not affected, and ensure the cleanliness of the foam.

[0054] In a possible design, before the step of performing a cleaning treatment on the foam to be cleaned by a cleaning device, the foam cleaning method further includes:

[0055] Perform a dust removal treatment on the foam to be cleaned.

[0056] Through the above scheme, the foam is dusted before cleaning, so that loose particles or dust that may exist on the surface of the formed foam can be removed, effectively preventing particles or dust from entering the subsequent cleaning process, which helps to improve the cleaning effect of the foam.

[0057] In a possible design, the dust removal process for the foam to be cleaned includes: performing dust removal process on the foam for a seventh preset time at a preset wind pressure and a preset wind speed by a dust collector.

[0058] Through the above scheme, a dust collector is used, and the dust collector is used to remove dust from the foam for a certain period of time under a preset wind pressure and a preset wind speed. The structure is simple, the use is convenient, and the cleaning effect is good.

[0059] In a second aspect, the present application provides a foam preparation method, comprising:

[0060] Making molded foam;

[0061] The foam is cleaned by the foam cleaning method as described above.

[0062] The foam preparation method provided in the present application can clean the molded foam by using the above-mentioned foam cleaning method after the foam preparation is completed. Specifically, the molded foam to be cleaned is first cleaned, then the cleaned foam is rinsed, then the rinsed foam is dehydrated, and finally the dehydrated foam is dried. That is to say, the foam to be cleaned is sequentially cleaned, rinsed, dehydrated, and dried to remove the attachments on the surface and inside of the foam, thereby realizing the cleaning operation of the foam. For example, after the foam is formed, , and wash, rinse, dehydrate and dry it in turn to remove the attachments on the surface and inside of the molded foam. In this way, no particles, release agents, grease and other stains will remain on the surface and inside the pores of the foam, thereby improving the cleanliness of the foam itself. To a certain extent, it avoids the phenomenon of migration of stains on the surface of the foam under transportation vibration, humidity and other environments, which affects the appearance of the product, and will not cause pollution to the product due to migration stains, thereby improving the performance of the foam, avoiding customer complaints, and improving customer experience.

[0063] The beneficial effects provided in the above-mentioned second aspect and various possible designs of the above-mentioned second aspect can refer to the beneficial effects brought about by the above-mentioned first aspect and various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 The process diagram of the foam preparation method described in one embodiment of the present application is as follows Figure 1 .

[0065] Figure 2 Flow schematic of the foam preparation method according to an embodiment of the present application Figure 2 。

[0066] Figure 3 Flow schematic of the foam preparation method according to an embodiment of the present application Figure 3 。

[0067] Figure 4 Flow schematic of the foam preparation method according to an embodiment of the present application Figure 4 。

[0068] Figure 5 Flow schematic of the foam preparation method according to an embodiment of the present application Figure 5 。

[0069] Figure 6 Flow schematic of the foam preparation method according to an embodiment of the present application Figure 6 。 Detailed implementation manners

[0070] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the drawings are intended to cover non-exclusive inclusion.

[0072] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0073] As used herein, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent three cases: the existence of A, the co-existence of A and B, and the existence of B. Additionally, the character " / " herein generally indicates an "or" relationship between the associated objects before and after it.

[0074] The directional terms appearing in the following descriptions are all the directions shown in the figures, and do not limit the specific structure of the equipment applied in the foam cleaning method and foam preparation method of the present application. For example, in the description of the present application, terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0075] Furthermore, terms such as "first", "second", etc. in the description, claims or the above-mentioned drawings of the present application are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0076] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups).

[0077] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection by screws, bolts, or other spacer members; a physical connection can also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. The "connection" or "coupling" of circuit structures can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate component as long as the circuit is connected. It can also be the communication inside two components; a signal connection can refer not only to a signal connection through a circuit but also to a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0078] Referring Figures 1 to 6 As shown, this embodiment provides a method for cleaning a foam, and the method for cleaning the foam specifically includes:

[0079] S101. Perform a cleaning process on the foam to be cleaned.

[0080] By cleaning the foam to be cleaned, the particulate matter, mold release agent, grease, and other stains remaining on the surface and inside the pores of the foam can be detached from the foam to a certain extent, realizing the cleaning of the foam.

[0081] In some embodiments, the step of performing a cleaning process on the foam to be cleaned includes:

[0082] S111. Place the foam to be cleaned into a cleaning device.

[0083] By placing the foam to be cleaned into a cleaning device and cleaning the foam through the cleaning device, the particulate matter, mold release agent, grease, and other stains remaining on the surface and inside the pores of the foam can be better detached from the foam, realizing the automatic cleaning of the foam. The cleaning effect is better, and compared with manual cleaning of the foam, it saves time and effort and reduces labor costs.

[0084] Specifically, for example, the foam can be placed flat in the cleaning device, and the cleaning effect is better. Of course, the placement of the foam in the cleaning device is not limited to being flat.

[0085] S121. Inject a cleaning medium into the cleaning device.

[0086] S131. Clean the foam by means of a cleaning device.

[0087] By placing the foam to be cleaned into the cleaning device, injecting a cleaning medium into the cleaning device, and then starting the cleaning device, the foam can be cleaned by the cleaning device, realizing automatic cleaning of the foam. The cleaning efficiency is relatively high, the operation is simple, the use is convenient, and it is convenient to clean the foam.

[0088] It should be noted that there is no order of precedence between steps S111 and S121.

[0089] In specific implementation, the foam to be cleaned can be placed into the cleaning device first, and then the cleaning medium can be injected into the cleaning device; or the cleaning medium can be injected into the cleaning device first, and then the foam to be cleaned can be placed into the cleaning device. Of course, the foam to be cleaned can also be placed into the cleaning device while injecting the cleaning medium into the cleaning device.

[0090] In some embodiments, the cleaning medium includes a cleaning liquid.

[0091] By making the cleaning medium include water and a cleaning liquid, the water and the cleaning liquid form a mixed solution. The surfactant in the cleaning liquid can reduce the surface tension of the mixed solution and form rich foam. These foams can wrap stains such as residual particulate matter, mold release agents, and grease, so that the stains are cleaned off, improving the cleaning efficiency.

[0092] In some embodiments, the cleaning liquid includes deionized water.

[0093] By making the cleaning liquid include deionized water, the deionized water removes ionic impurity components in the water, reducing the reaction between the surfactant in the cleaning liquid and the hardness ions in the water quality, thereby avoiding the formation of difficult-to-clean precipitates, ensuring that the cleaning liquid plays a more sufficient role, and being more likely to penetrate into the pores of the foam. The deionized water is more efficient and gentle when removing stains from the foam, especially suitable for removing stubborn stains remaining inside the pores of the foam, further improving the cleaning effect and cleaning efficiency. Moreover, the deionized water does not corrode the foam, that is, it does not damage the performance of the foam, ensuring the stable performance of the foam after cleaning and avoiding customer complaints. At the same time, using deionized water does not cause environmental pollution and has a certain role in environmental protection.

[0094] In specific implementation, when the density of the foam is less than 30 g / cm 3 deionized water can be used as the cleaning liquid to clean the foam.

[0095] In specific implementation, the resistivity of the deionized water is greater than or equal to 15 MΩ.cm.

[0096] By making the resistivity of deionized water greater than or equal to 15 MΩ·cm, that is, the resistivity of deionized water is not less than 15 MΩ·cm, the resistivity of deionized water is relatively high, the conductivity is relatively small, and the effect of removing stains such as particulate matter, mold release agents, and grease is better. Further, the residual stains in the foam are avoided, and the cleaning effect of the foam is better. At the same time, it further ensures that the foam will not be corroded, makes the performance of the foam more stable after cleaning, and helps to extend the service life of the foam.

[0097] In some embodiments, the cleaning solution includes a weak acidic solution with a preset pH value.

[0098] By making the cleaning solution a weak acidic solution, such a weak acidic environment can neutralize and remove the alkaline substances or metal ions adsorbed by the foam, and can also inhibit the growth of microorganisms, improving the cleaning effect on the foam. And the acidic condition can decompose the water scale formed by hard water, such as calcium carbonate, magnesium salts, etc., avoiding clogging the pores of the foam, helping to extend the service life of the foam; it also avoids fiber breakage or elastic loss of the foam, maintaining the structural stability of the foam, making the performance of the foam stable after cleaning, and further extending the service life of the foam.

[0099] When specifically implemented, when the density of the foam is greater than 30 g / cm 3 a weak acidic solution can be used as the cleaning solution to clean the foam.

[0100] Among them, the preset pH value of the weak acidic solution can be, for example, 5 - 6, and the neutralization effect is better.

[0101] If the preset pH value of the weak acidic solution is greater than 6, it means it is alkaline, and the alkaline environment will have a negative impact on the foam material. For example, it will damage the fiber structure of the foam, make the foam hard and gray, thus affecting the performance of the foam and reducing the service life of the foam. And if there is residue of the alkaline cleaning solution, it will have a potential hazard to the weakly acidic human skin, causing skin dryness, allergies, etc., which is not conducive to human health.

[0102] If the preset pH value of the weak acidic solution is less than 5, when cleaning the foam, it will corrode the foam, resulting in a decline in the performance of the foam and a shortening of the service life. Moreover, it will also corrode the cleaning equipment, especially the metal parts of the cleaning equipment, damaging the cleaning equipment and affecting its use. And if it is directly discharged into the environment without proper treatment, it will also cause pollution to water bodies and soil, affecting the ecological environment.

[0103] In some implementation manners, the weak acidic solution is composed of deionized water, organic acid, and nonionic surfactant. Among them, the mixing ratio of deionized water, organic acid, and nonionic surfactant is 95% - 97%, 1% - 3%, 0.5% - 1%, the cleaning effect is better, and it can make the performance of the foam stable after cleaning and have a long service life.

[0104] Among them, the organic acid can be, for example, citric acid or acetic acid, etc.

[0105] When the cleaning solution is a weakly acidic solution with a preset pH value, referring to Figure 2 As shown, in some embodiments, before the step of rinsing the cleaned foam, the foam cleaning method of this embodiment further includes:

[0106] S1011. Neutralize the cleaned foam.

[0107] In some implementation manners, specifically neutralizing the cleaned foam may include neutralizing the cleaned foam with a neutralizing agent for a first preset time.

[0108] By using a neutralizing agent to neutralize the foam cleaned with a weakly acidic solution for a certain period of time, the residual acidity can be neutralized, thereby further avoiding the phenomenon of the foam being corroded, making the structure of the foam more stable and the service life longer.

[0109] Specifically in implementation, the neutralizing agent can be, for example, a 0.5% sodium bicarbonate solution.

[0110] Among them, the first preset time is not greater than 10 s, which has a good neutralizing effect on the residual acidity and will not corrode the foam.

[0111] In some embodiments, the cleaning device can be, for example, an ultrasonic cleaner.

[0112] By using an ultrasonic cleaner to clean the foam, not only is the structure simple and easy to implement, but also the ultrasonic cleaner utilizes the cavitation effect, acceleration effect and jet effect of ultrasonic waves in the liquid, can penetrate into the fine gaps and holes of the foam, and thoroughly remove stains such as particulate matter, mold release agent, and grease, ensuring the cleaning effect. At the same time, the ultrasonic cleaner will not cause mechanical wear and chemical corrosion to the foam, maintaining the integrity and performance of the foam.

[0113] In some other embodiments, the cleaning device can also be, for example, a high-pressure steam cleaner, a jet cleaner, etc.

[0114] The following embodiments will be explained and illustrated by taking the cleaning device as an ultrasonic cleaner as an example.

[0115] In some embodiments, the power density of the ultrasonic cleaner is 0.5 - 1.2 W / cm 2 .

[0116] Through the above solution, the power density of the ultrasonic cleaner is 0.5 - 1.2 W / cm 2, that is, the power density of the ultrasonic cleaning machine is relatively large, which can ensure that the ultrasonic energy fully acts on the cleaning medium, generating sufficient cavitation effect and micro-jet, so as to effectively remove the stains on the surface and inside the pores of the foam, improving the cleaning effect.

[0117] In some embodiments, the frequency of the ultrasonic cleaning machine switches between a first preset frequency and a second preset frequency.

[0118] Through the above solution, the frequency of the ultrasonic cleaning machine is switched between the first preset frequency and the second preset frequency. For example, it works alternately between low frequency and high frequency. In this way, the cavitation bubbles of the ultrasonic cleaning machine at low frequency are thick and have high compressive strength, and the cleaning effect on the stubborn stains attached to the surface of the foam is better; the cavitation bubbles of the ultrasonic cleaning machine at high frequency are delicate and have strong penetration, and the cleaning effect on the stains inside the pores of the foam is better. Therefore, by switching the ultrasonic cleaning machine between different frequencies, the stains on the foam can be removed more effectively, improving the cleaning quality and cleaning efficiency.

[0119] Among them, the first preset frequency can be, for example, a low frequency, and the frequency range of the low frequency is 26 kHz - 30 kHz.

[0120] The second preset frequency can be, for example, a high frequency, and the frequency range of the high frequency is 110 kHz - 130 kHz.

[0121] In some embodiments, the ultrasonic cleaning machine performs a cleaning process on the foam to be cleaned at a first preset temperature for a second preset time.

[0122] Through the above solution, the foam to be cleaned is kept in the ultrasonic cleaning machine for a certain period of time for cleaning, which ensures that the foam can be fully cleaned in the ultrasonic cleaning machine and the cleaning effect of the foam is better. At the same time, when the foam is being cleaned in the ultrasonic cleaning machine, the washing temperature in the ultrasonic cleaning machine is the first preset temperature, which can effectively soften the stains, promote the dissolution of the stains, and enhance the cleaning effect of the foam.

[0123] Specifically, the first preset temperature can be, for example, 25°C - 40°C, which can effectively soften the stains, promote the dissolution of the stains, and enhance the cleaning effect of the foam.

[0124] The second preset time can be, for example, 1 min - 10 min. The cleaning time is appropriate and the cleaning effect on the foam is better.

[0125] Among them, the second preset time can also be adjusted correspondingly according to the thickness of the foam. For example, the above cleaning time of 1 min - 10 min is suitable for foams with a thickness less than 30 mm; if the thickness of the foam is greater than 30 mm, then on the basis of 10 min, for every 10 mm increase in the thickness of the foam, the cleaning time is extended by 2 min.

[0126] Exemplarily, if the thickness of the foam is 40 mm, the cleaning time can be 12 min.

[0127] S102. Rinse the cleaned foam.

[0128] In some implementation manners, the cleaning device may, for example, have a cleaning tank and a rinsing tank. The cleaning tank and the rinsing tank are independent of each other. The cleaning tank is used for cleaning the foam to be cleaned, and the rinsing tank is used for rinsing the cleaned foam. That is to say, the rinsing tank for rinsing the cleaned foam is integrated with the cleaning device. In this way, the cleaning device can not only clean the foam but also rinse the foam.

[0129] In some other implementation manners, the rinsing tank for rinsing the cleaned foam is independent of the cleaning device.

[0130] In some embodiments, the cleaned foam is rinsed with a rinsing liquid.

[0131] By rinsing the cleaned foam with a rinsing liquid, the residual stains on the foam and the stains shed during the cleaning process can be more effectively rinsed off by using the power of the water flow, ensuring the cleanliness of the foam and avoiding secondary pollution.

[0132] In some implementation manners, the rinsing liquid can be, for example, deionized water, which has a good rinsing effect and no pollution.

[0133] In some other implementation manners, the rinsing liquid can also be, for example, hydrogen peroxide, sodium chlorite, etc.

[0134] Of course, in some other embodiments, domestic water can also be directly used to rinse the cleaned foam.

[0135] In specific implementation, the rinsing liquid can be directly sprayed onto the cleaned foam by means of spraying, for example. In this way, the water flow can directly rinse the foam, more thoroughly removing the residual stains on the foam, improving the rinsing effect and making the foam cleaner. Moreover, compared with the traditional rinsing direction, spray rinsing is more water-saving and saves rinsing liquid, reducing the cleaning cost of the foam to a certain extent.

[0136] Reference Figure 4 and Figure 6 As shown, in some embodiments, the steps of rinsing the cleaned foam include:

[0137] S1021. Put the cleaned foam into the rinsing liquid for soaking, where the soaking time is not greater than a third preset time.

[0138] Among them, the third preset time can be, for example, 2 min. That is to say, the time for the cleaned foam to be soaked in the rinsing liquid is no more than 2 min.

[0139] If the soaking time is too long, such as more than 2 min, the structure of the foam will be damaged and its performance will be reduced.

[0140] S1022. Rinse the soaked foam.

[0141] By first putting the cleaned foam into the rinsing liquid for soaking treatment for a certain period of time and then rinsing the soaked foam, the soaking process prolongs the reaction time, allowing the rinsing liquid more time to react with the stains, thereby more thoroughly removing the stains on the foam, especially the stubborn stains inside the pores of the foam, improving the cleaning effect. At the same time, the soaked foam is easier to remove the residual stains and rinsing liquid during rinsing, which can save time and water resources.

[0142] S103. Dehydrate the rinsed foam.

[0143] In some embodiments, put the rinsed foam into a dehydration device and dehydrate the foam for a fourth preset time at a preset rotational speed.

[0144] By putting the rinsed foam into a dehydration device and dehydrating the foam for a certain period of time at a preset rotational speed, the water content of the foam is reduced. This not only improves the subsequent drying speed, making the cleaning efficiency of the foam higher, but also prevents the foam from mildewing or deforming, and the service performance is stable. In addition, the performance of the foam is stable after dehydration and is not easily affected by environmental humidity, thus ensuring the product quality.

[0145] Specifically, for example, the rinsed foam can be placed vertically in the dehydration device for dehydration treatment, which not only has a good dehydration effect but also avoids damaging the structure of the foam and deforming it, ensuring the structural integrity and performance stability of the foam.

[0146] Among them, the dehydration device can be, for example, a dehydrator, specifically a centrifugal dehydrator, a pressure dehydrator, a vacuum dehydrator, etc.

[0147] In addition, the preset rotational speed of the dehydration device can be, for example, 200 rpm - 400 rpm.

[0148] The fourth preset time can be, for example, 1 min - 5 min, that is, the time for dehydrating the foam can be 1 min - 5 min, and the dehydration time is appropriate with a good dehydration effect.

[0149] If the dehydration time is too short, there will be too much residual moisture in the foam, resulting in poor dehydration effect. If the dehydration time is too long, the structure of the foam will be damaged, affecting its performance.

[0150] S104. Dry the dehydrated foam.

[0151] Reference Figure 3 and Figure 6 As shown in [references not specified], in some embodiments, the steps of drying the dehydrated foam include:

[0152] S1041. Dry the dehydrated foam by baking;

[0153] and / or, S1042. Air-dry the dehydrated foam.

[0154] By baking and air-drying the dehydrated foam, the excess moisture in the foam can be quickly evaporated, shortening the drying time, with high drying efficiency, which is beneficial to improving the cleaning efficiency of the foam and facilitating the transportation and storage of the foam. In addition, during the baking and air-drying processes of the foam, its physical properties are improved, such as reducing expansion and deformation, making the foam more stable and durable.

[0155] It should be noted that there is no order between step S1041 and step S1042.

[0156] In specific implementation, either the dehydrated foam can be baked first, or the dehydrated foam can be air-dried first.

[0157] Exemplarily, first bake the dehydrated foam, and then air-dry the baked foam.

[0158] Exemplarily, first air-dry the dehydrated foam, and then bake the air-dried foam.

[0159] In some embodiments, when drying the dehydrated foam by baking, the above-mentioned baking process of the dehydrated foam specifically may include: putting the foam into a baking chamber and baking the foam at a second preset temperature for a fifth preset time;

[0160] By placing the foam in a drying chamber and conducting a drying process at a second preset temperature for a certain period of time, the drying chamber can provide uniform temperature and humidity control, quickly and effectively dry the foam, shorten the drying time, improve the cleaning efficiency of the foam, and avoid quality problems of the foam caused by uneven temperature or excessive humidity by using the drying chamber to dry the foam, ensuring the stable performance of the foam. In addition, the drying chamber is usually of a closed design, which can reduce heat loss, improve energy utilization efficiency, and save energy consumption.

[0161] In specific implementation, the second preset temperature can be, for example, 30°C - 60°C, which can reduce the moisture content in the foam to below 5%, and has a good drying effect on the foam.

[0162] The fourth preset time can be, for example, 10 min - 30 min. That is to say, the drying time for the foam can be 10 min - 30 min, and the drying time is relatively appropriate with a good drying effect.

[0163] In some embodiments, when drying the dehydrated foam by air drying, the above-mentioned air drying process for the dehydrated foam can specifically include: placing the foam in a clean room and conducting an air drying process on the foam at a third preset temperature and a preset humidity for a sixth preset time.

[0164] By placing the foam in a clean room and air drying it for a certain period of time at a third preset temperature, it can effectively prevent the foam from being contaminated or damaged during the air drying process, ensure that the quality and performance of the foam are not affected, and ensure the cleanliness of the foam.

[0165] In specific implementation, the third preset temperature can be, for example, 23°C - 27°C, which is suitable for the rapid evaporation of moisture in the foam.

[0166] The preset humidity is 40% - 50%, which is similar to the humidity in natural air. In this way, after the air drying process of the foam is completed, there will be no phenomenon of moisture exchange and resulting moisture absorption when the foam leaves the clean room.

[0167] The sixth preset time is 12 h - 24 h, which can ensure that the moisture in the foam is completely volatilized, facilitating storage and use.

[0168] It should be noted that the foam cleaning method provided in this embodiment can clean both the newly formed foam and the used intermediate foam for secondary cleaning.

[0169] The foam cleaning method provided by this application first performs a cleaning process on the foam to be cleaned through a cleaning device, then performs a rinsing process on the cleaned foam, then performs a dehydration process on the rinsed foam, and finally performs a drying process on the dehydrated foam. That is to say, the foam to be cleaned is successively subjected to cleaning, rinsing, dehydration, and drying processes, removing the attachments on the surface and inside of the foam, and realizing the cleaning operation of the foam. For example, after the foam is formed, by successively performing cleaning, rinsing, dehydration, and drying processes on it, the attachments on the surface and inside of the formed foam are removed. In this way, there will be no residues of particles, mold release agents, grease and other stains on the surface and inside of the pores of the foam, improving the cleanliness of the foam itself. Thus, to a certain extent, it avoids the phenomenon that the surface of the foam appears migrating stains in environments such as transportation vibration and humidity, which affects the appearance of the product, and will not cause pollution to the product due to migrating stains. Furthermore, it improves the service performance of the foam, avoids the occurrence of customer complaints, and enhances the customer's use experience.

[0170] Reference Figure 3 、 Figure 5 and Figure 6 As shown in

[0171] S100. Perform a dust removal process on the foam to be cleaned.

[0172] By performing a dust removal process on the foam before the cleaning process, the loose particles or dust that may exist on the surface of the formed foam can be removed, effectively avoiding the entry of particles or dust into the subsequent cleaning process, and helping to improve the cleaning effect of the foam.

[0173] In some embodiments, through a dust collector, the foam is subjected to a seventh preset time of dust removal process under a preset wind pressure and a preset wind speed.

[0174] By using a dust collector and making the dust collector perform a certain time of dust removal process on the foam under a preset wind pressure and a preset wind speed, the structure is simple, easy to use, and the cleaning effect is good.

[0175] Specifically, the preset wind pressure can be, for example, 0.1 Mpa - 0.3 Mpa, and the preset wind speed can be, for example, 2 m / s - 3 m / s. The seventh preset time can be, for example, 10 s - 60 s, and the dust removal effect is good, facilitating subsequent cleaning.

[0176] Specifically, the dust collector can be, for example, a negative pressure adsorption dust collector, and the dust removal effect is good.

[0177] This embodiment provides a foam preparation method, which includes:

[0178] Manufacture molded foam;

[0179] Clean the manufactured and molded foam by using a foam cleaning method.

[0180] In the foam preparation method provided by this application, after the foam is prepared, the molded foam is cleaned by using a foam cleaning method. Specifically, the molded foam to be cleaned is first cleaned by a cleaning device, then the cleaned foam is rinsed, then the rinsed foam is dehydrated, and finally the dehydrated foam is dried. That is to say, the foam to be cleaned is successively subjected to cleaning, rinsing, dehydration, and drying treatments, removing the attachments on the surface and inside of the foam, realizing the cleaning operation of the foam. For example, after the foam is manufactured and molded, by successively cleaning, rinsing, dehydrating, and drying it, the attachments on the surface and inside of the molded foam are removed. In this way, there will be no residues of particulate matter, mold release agent, grease and other stains on the surface and inside of the pores of the foam, improving the cleanliness of the foam itself. Thus, to a certain extent, it avoids the phenomenon that the surface of the foam appears migrating stains in the environments such as transportation vibration and humidity, which affects the appearance of the product, and it will not contaminate the product due to the migrating stains. Furthermore, it improves the use performance of the foam, avoids the occurrence of customer complaints, and enhances the customer's use experience.

[0181] The implementation steps and principles of the foam cleaning method in this embodiment are the same as those of the foam cleaning method provided in the above embodiment, and can bring the same or similar technical effects, which will not be elaborated one by one here. For details, please refer to the description of the above embodiment.

Claims

1. A foam cleaning method, characterized in that: include: Clean the foam to be cleaned; Rinse the cleaned foam; Dehydrating the rinsed foam; The dehydrated foam is dried.

2. The foam cleaning method according to claim 1, characterized in that: The step of cleaning the foam to be cleaned comprises: placing the foam to be cleaned into a cleaning device; injecting a cleaning medium into the cleaning device; The foam is cleaned by the cleaning device.

3. The foam cleaning method according to claim 2, characterized in that: The cleaning medium includes water and cleaning liquid.

4. The foam cleaning method according to claim 3, characterized in that: The cleaning solution includes deionized water; The resistivity of the deionized water is greater than or equal to 15 MΩ.cm.

5. The foam cleaning method according to claim 3, characterized in that: The cleaning solution includes a weakly acidic solution with a preset pH value; The weak acid solution is mixed with deionized water, organic acid and non-ionic surfactant, wherein the mixing ratio of the deionized water, the organic acid and the non-ionic surfactant is 95%-97%, 1%-3% and 0.5%-1%.

6. The foam cleaning method according to claim 5, characterized in that: Before the step of rinsing the cleaned foam, the foam cleaning method further comprises: neutralizing the cleaned foam; The neutralizing treatment of the cleaned foam comprises: The cleaned foam is subjected to a neutralization treatment for a first preset time by using a neutralizer.

7. The foam cleaning method according to claim 2, characterized in that: The cleaning equipment includes an ultrasonic cleaning machine; And / or, the power density of the cleaning equipment is 0.5-1.2 W / cm 2 ; and / or, the frequency of the cleaning device is switched between a first preset frequency and a second preset frequency; And / or, the cleaning device performs a cleaning process on the foam to be cleaned at a first preset temperature for a second preset time.

8. The foam cleaning method according to claim 1, characterized in that: The rinsing liquid used in the rinsing process of the cleaned foam includes deionized water.

9. The foam cleaning method according to claim 1, characterized in that: The step of rinsing the cleaned foam comprises: Putting the cleaned foam into a rinsing liquid for soaking, wherein the soaking time is no longer than a third preset time; The foam after soaking is rinsed.

10. The foam cleaning method according to claim 1, characterized in that: The rinsed foam is placed in a dehydration device, and the foam is dehydrated for a fourth preset time at a preset speed.

11. The foam cleaning method according to claim 1, characterized in that: The step of drying the dehydrated foam comprises: Drying the dehydrated foam; And / or, the dehydrated foam is air-dried.

12. The foam cleaning method according to claim 11, characterized in that: The step of drying the dehydrated foam includes drying the dehydrated foam, wherein the drying the dehydrated foam includes: placing the foam in a drying chamber, and drying the foam at a second preset temperature for a fifth preset time; And / or, the step of drying the dehydrated foam includes air-drying the dehydrated foam, and the step of drying the dehydrated foam includes: placing the foam in a clean room and air-drying the foam for a sixth preset time at a third preset temperature and preset humidity.

13. The foam cleaning method according to any one of claims 1 to 12, characterized in that: Before the step of cleaning the foam to be cleaned, the foam cleaning method further comprises: The foam to be cleaned is subjected to dust removal treatment.

14. The foam cleaning method according to claim 13, characterized in that: The dust removal process for the foam to be cleaned includes: performing dust removal process on the foam for a seventh preset time at a preset wind pressure and a preset wind speed by a dust collector.

15. A method for preparing foam, characterized in that: include: Making molded foam; The foam formed is cleaned using the foam cleaning method as described in any one of claims 1 to 14.

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