阅读说明：本技术 一种低成本磁性吸波防水垫圈制备装置及方法 (Low-cost magnetic wave-absorbing waterproof gasket preparation device and method ) 是由 李维佳 郭仲前 左超 冯新星 陈卓 谢海岩 张宏亮 陈良 于 2021-11-10 设计创作，主要内容包括：本发明涉及一种低成本磁性吸波防水垫圈制备装置及方法,所述低成本磁性吸波防水垫圈制备方法包括如下步骤：磁性吸收剂浆料制备；磁性防水胶垫以涂布的方式在基膜表面进行成膜；防水胶垫磁场震荡；防水胶垫高频抖动；防水胶垫热固化反应成型；防水胶垫导入模压机连续冲切成型；最终形成具有电磁波吸收及抗干扰功能的插接件用防水垫圈。本发明具有以下技术效果：1.可实现连续性防水垫圈制备,便于连续生产,降低生产成本；2.功能一体化,通过增加防水垫圈的电磁波吸收功能,在不增加其余空间基础上,降低了插接件处辐射,提高了模组间的抗干扰能力；3.工艺简单,使用设备及工艺均为通用生产设备及工艺。(The invention relates to a device and a method for preparing a low-cost magnetic wave-absorbing waterproof gasket, wherein the method for preparing the low-cost magnetic wave-absorbing waterproof gasket comprises the following steps: preparing magnetic absorbent slurry; forming a film on the surface of the base film by the magnetic waterproof rubber mat in a coating mode; magnetic field oscillation of the waterproof rubber mat; high-frequency shaking of the waterproof rubber mat; the waterproof rubber mat is formed by thermosetting reaction; the waterproof rubber mat is led into a molding press for continuous punching and molding; finally, the waterproof gasket for the plug connector with electromagnetic wave absorption and anti-interference functions is formed. The invention has the following technical effects: 1. the preparation of the continuous waterproof gasket can be realized, the continuous production is convenient, and the production cost is reduced; 2. the functions are integrated, and by increasing the electromagnetic wave absorption function of the waterproof gasket, on the basis of not increasing other spaces, the radiation at the plug connector is reduced, and the anti-interference capability among modules is improved; 3. the process is simple, and the used equipment and the process are all universal production equipment and processes.)

1. A low-cost magnetic wave-absorbing waterproof gasket preparation device is characterized by comprising a casting waterproof rubber gasket, a casting scraper, a slurry box, a casting base film belt driving wheel, a casting base film belt, an electromagnet, an eccentric wheel and a multi-temperature-zone oven;

the slurry box is used for containing defoamed slurry; the casting scraper is positioned at the discharge port of the slurry box; the electromagnet is positioned on one side of the casting scraper, which is far away from the slurry box; the eccentric wheel is positioned on one side of the electromagnet far away from the casting scraper; curtain coating base film membrane area is located electro-magnet and eccentric wheel top, is driven by curtain coating base film membrane film belt transmission wheel, and then drives the removal of curtain coating waterproof cushion.

2. The device for preparing the low-cost magnetic wave-absorbing waterproof gasket according to claim 1, wherein the distance between the electromagnet and a discharge port of a scraper of a casting machine is 10cm, and the period of the electromagnet is set to 2000 hz; the distance between the eccentric wheel and the discharge hole of the scraper of the casting machine is 20cm, and the period of the eccentric wheel is set to be 1000 hz; the multi-temperature-zone oven is provided with a plurality of temperature zones, wherein the temperature of the first temperature zone is 60 ℃, the temperature of the second temperature zone is 80 ℃, the temperature of the third temperature zone is 100 ℃, and the temperature of the fourth temperature zone is 120 ℃.

3. A preparation method of a low-cost magnetic wave-absorbing waterproof gasket is characterized by comprising the following steps:

dispersing, standing and defoaming a mixture of a magnetic absorbent, a high molecular polymer and an auxiliary agent to prepare magnetic absorbent slurry, and putting the prepared magnetic absorbent slurry into a slurry box;

an electromagnet and an eccentric wheel are arranged on the outer side of a discharge port of the slurry box, the electromagnet enables the casting waterproof rubber mat passing through the magnetic field to vibrate, and the eccentric wheel enables the casting waterproof rubber mat to shake in a high frequency mode;

the waterproof rubber mat after high-frequency shaking enters an oven for drying and curing;

and (3) guiding the dried waterproof rubber gasket into continuous molding equipment, and continuously punching the waterproof rubber gasket into an annular rubber gasket to finally form the waterproof gasket with electromagnetic wave absorption and anti-interference functions.

4. The method for preparing the low-cost magnetic wave-absorbing waterproof gasket according to claim 3, wherein the magnetic absorbent comprises one or more of spherical or flaky iron-based metal powder, spherical or flaky iron-based alloy powder, spherical or flaky ferrosilicon-aluminum alloy powder, spherical or flaky ferrosilicon-silicon alloy powder, spherical or flaky ferrosilicon-chromium alloy powder, spherical or flaky cobalt-based alloy powder, spherical or flaky ferronickel alloy powder, carbon fiber, iron-based alloy fiber and glass fiber.

5. The method for preparing the low-cost magnetic wave-absorbing waterproof gasket according to claim 3, wherein the magnetic absorbent slurry is prepared by mixing a magnetic absorbent with a liquid high polymer and an auxiliary agent, wherein the liquid high polymer comprises one or more of polyurethane resin, silicone resin, organic silicon resin, acrylic resin, epoxy resin, polyimide and ethylene-vinyl acetate copolymer.

6. The method for preparing the low-cost magnetic wave-absorbing waterproof gasket according to claim 3, wherein the auxiliary agent comprises one or more of a diluent, a curing agent, a catalyst, a dispersing agent, a leveling agent, a wetting agent, a thickening agent and a defoaming agent.

7. The method for preparing the low-cost magnetic wave-absorbing waterproof gasket according to claim 3, wherein in the magnetic absorbent slurry, the mass fraction of the liquid high molecular polymer is 5-70%, the mass fraction of the dispersing agent is 0.1-7%, the mass fraction of the curing agent is 0.1-10%, the mass fraction of the catalyst is 0.001-3%, the mass fraction of the diluting agent is 0.1-10%, the mass fraction of the leveling agent is 0.1-3%, the mass fraction of the wetting agent is 0.1-5%, the mass fraction of the thickening agent is 0.1-20%, and the mass fraction of the defoaming agent is 0.1-8%.

8. The method for preparing the low-cost magnetic wave-absorbing waterproof gasket according to claim 3, wherein the prepared magnetic absorbent slurry is placed in a slurry box, and then a film-forming coiled material is prepared on the surface of the base film in a coating mode, wherein the coating mode is one or more of blade casting coating, lip extrusion coating, transfer coating and base film immersion coating.

9. The method for preparing the low-cost magnetic wave-absorbing waterproof gasket according to claim 3, wherein the vibrated waterproof rubber gasket is dried, cured and molded, and the drying is multi-temperature-zone drying tunnel drying, wherein the drying temperature is from low to high and ranges from 40 ℃ to 180 ℃.

10. The method for preparing the low-cost magnetic wave-absorbing waterproof gasket according to claim 3, wherein the thickness of the waterproof rubber gasket is 0.2mm to 5 mm.

Technical Field

The invention relates to the technical field of waterproof gaskets, in particular to a device and a method for preparing a low-cost magnetic wave-absorbing waterproof gasket.

Background

In recent years, with the progress of electronic technology, electronic devices have been gradually miniaturized, thinned, and modularized. Further, with the application of 5G communication technology, electronic devices are increasingly developed to the aspect of multi-band and wide-band integrated application. However, this development trend undoubtedly increases the design and manufacturing difficulty of electronic devices, and the problem of mutual interference and compatibility of multiple frequency bands also becomes a key difficulty in the integrated design of electronic devices.

Due to the integrated design of the versatility of electronic devices, the development of electronic devices is gradually becoming modular. In the modular design of electronic equipment, the integration among modules is often summarized from the subsystems to the main processor in a flat cable plug connector mode. For example, the video module, the antenna module, the power module and the display module are prepared in a modularized mode, are connected with a standard interface and are finally connected to the mainboard through the plug connector. However, with the increase in data processing speed and the increase in bandwidth of 5G communications, the problem of electromagnetic leakage at the module plug-in is becoming more and more prominent. Each frequency band that is revealed by the plug connector disturbs the electromagnetic wave, will concentrate and assemble to the smart machine mainboard to cross talk to each branch system, disturb mainboard main processing signal even.

In the traditional solution, the problems are usually solved only by reducing the signal intensity, expanding the module distance and applying the wave-absorbing material on the flat cable. And around the plug connector of being connected between the smart machine module, in order to improve the stability of plug connector and prevent the short circuit characteristic, can add waterproof gasket accessory around the plug connector generally. Thus, after water enters from the outside, the plug connector part is not short-circuited. The invention develops the idea that aiming at the interference problem, electromagnetic wave absorption and anti-interference functions are added in the waterproof gasket fitting of the plug connector, so that the problem of high-frequency electromagnetic wave leakage of the plug connector is better solved, the isolation degree of interference entering from the channel is improved, and the EMC/EMI function between modules is enhanced.

Disclosure of Invention

Aiming at the problem or the defect of interference, the invention provides the waterproof gasket with the electromagnetic wave absorbent anti-interference function, and the waterproof gasket of the connector has the effects of absorbing electromagnetic waves and resisting interference by modifying the waterproof gasket around the flat cable connector, so that the electromagnetic interference suppression effect among modules is realized under the condition that other environments are not changed. And the waterproof gasket can be continuously produced in a coating mode, the original mould pressing mode is changed, the production continuity is improved, and the production cost is greatly reduced.

The invention relates to a low-cost magnetic wave-absorbing waterproof gasket preparation device which comprises a casting waterproof rubber mat, a casting scraper, a slurry box, a casting base film belt driving wheel, a casting base film belt, an electromagnet, an eccentric wheel and a multi-temperature-zone drying oven, wherein the casting waterproof rubber mat is arranged on the casting waterproof rubber mat;

the slurry box is used for containing defoamed slurry; the casting scraper is positioned at the discharge port of the slurry box; the electromagnet is positioned on one side of the casting scraper, which is far away from the slurry box; the eccentric wheel is positioned on one side of the electromagnet far away from the casting scraper; curtain coating base film membrane area is located electro-magnet and eccentric wheel top, is driven by curtain coating base film membrane film belt transmission wheel, and then drives the removal of curtain coating waterproof cushion.

Preferably, the distance between the electromagnet and the discharge hole of the scraper of the casting machine is 10cm, and the period of the electromagnet is set to 2000 hz; the distance between the eccentric wheel and the discharge hole of the scraper of the casting machine is 20cm, and the period of the eccentric wheel is set to be 1000 hz; the multi-temperature-zone oven is provided with a plurality of temperature zones, wherein the temperature of the first temperature zone is 60 ℃, the temperature of the second temperature zone is 80 ℃, the temperature of the third temperature zone is 100 ℃, and the temperature of the fourth temperature zone is 120 ℃.

The invention also relates to a preparation method of the low-cost magnetic wave-absorbing waterproof gasket, which comprises the following steps:

dispersing, standing and defoaming a mixture of a magnetic absorbent, a high molecular polymer and an auxiliary agent to prepare magnetic absorbent slurry, and putting the prepared magnetic absorbent slurry into a slurry box;

an electromagnet and an eccentric wheel are arranged on the outer side of a discharge port of the slurry box, the electromagnet enables the casting waterproof rubber mat passing through the magnetic field to vibrate, and the eccentric wheel enables the casting waterproof rubber mat to shake in a high frequency mode;

the waterproof rubber mat after high-frequency shaking enters an oven for drying and curing;

and (3) guiding the dried waterproof rubber gasket into continuous molding equipment, and continuously punching the waterproof rubber gasket into an annular rubber gasket to finally form the waterproof gasket with electromagnetic wave absorption and anti-interference functions.

Preferably, the magnetic absorbent comprises one or more of spherical or flaky iron-based metal powder, spherical or flaky iron-based alloy powder, spherical or flaky ferrosilicon-aluminum alloy powder, spherical or flaky ferrosilicon-silicon alloy powder, spherical or flaky ferrosilicon-chromium alloy powder, spherical or flaky cobalt-based alloy powder, spherical or flaky ferronickel alloy powder, carbon fiber, iron-based alloy fiber and glass fiber.

Preferably, the magnetic absorbent slurry is formed by mixing a magnetic absorbent, a liquid high molecular polymer and an auxiliary agent, wherein the liquid high molecular polymer comprises one or more of polyurethane resin, silicone resin, organic silicon resin, acrylic resin, epoxy resin, polyimide and ethylene-vinyl acetate copolymer.

Preferably, the auxiliary agent comprises one or more of a diluent, a curing agent, a catalyst, a dispersing agent, a leveling agent, a wetting agent, a thickening agent and a defoaming agent.

Preferably, in the magnetic absorbent slurry, the mass fraction of the liquid high molecular polymer is 5% to 70%, the mass fraction of the dispersant is 0.1% to 7%, the mass fraction of the curing agent is 0.1% to 10%, the mass fraction of the catalyst is 0.001% to 3%, the mass fraction of the diluent is 0.1% to 10%, the mass fraction of the leveling agent is 0.1% to 3%, the mass fraction of the wetting agent is 0.1% to 5%, the mass fraction of the thickener is 0.1% to 20%, and the mass fraction of the defoamer is 0.1% to 8%.

Preferably, after the prepared magnetic absorbent slurry is put into a slurry box, the film-forming coil preparation is carried out on the surface of the base film in a coating mode, wherein the coating mode is one or more of the combination of blade casting coating, lip extrusion coating, transfer coating and base film immersion coating.

Preferably, the vibrated waterproof rubber mat is dried, cured and molded, and the drying is a drying tunnel drying with multiple temperature zones, wherein the drying temperature is from low to high and ranges from 40 ℃ to 180 ℃.

Preferably, the waterproof rubber mat is between 0.2mm and 5mm thick.

Compared with the prior art, the low-cost magnetic wave-absorbing waterproof gasket preparation device and method provided by the invention at least have the following beneficial effects: 1. the continuous waterproof rubber mat can be prepared, the continuous production is convenient, and the production cost is reduced; 2. the functions are integrated, and by increasing the electromagnetic wave absorption function of the waterproof gasket, on the basis of not increasing other spaces, the radiation at the plug connector is reduced, and the anti-interference capability among modules is improved; 3. the process is simple, and the used equipment and the process are all universal production equipment and processes.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

FIG. 1 shows a schematic view of a structure of a waterproof rubber mat tape casting machine;

reference numerals: the method comprises the following steps of 1-casting waterproof rubber mat, 2-casting scraper, 3-slurry box, 4-casting base film belt driving wheel, 5-casting base film belt, 6-electromagnet and 7-eccentric wheel.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments in order to provide a further understanding of the nature and technical means of the invention, as well as the specific objects and functions attained by the invention.

Example one

A low-cost magnetic wave-absorbing waterproof gasket preparation device is characterized by comprising a casting waterproof rubber gasket, a casting scraper, a slurry box, a casting base film belt driving wheel, a casting base film belt, an electromagnet, an eccentric wheel and a multi-temperature-zone oven; the slurry box is used for containing defoamed slurry; the casting scraper is positioned at the discharge port of the slurry box; the electromagnet is positioned on one side of the casting scraper far away from the pulp box and is 10cm away from a discharge port of the casting scraper, and the period of the electromagnet is set to 2000 hz; the eccentric wheel is positioned on one side of the electromagnet, which is far away from the casting scraper, and is 20cm away from a discharge port of the casting scraper, and the period of the eccentric wheel is set to be 1000 hz; curtain coating base film membrane area is located electro-magnet and eccentric wheel top, is driven by curtain coating base film membrane film belt transmission wheel, and then drives the removal of curtain coating waterproof cushion. The multi-temperature-zone oven is provided with a plurality of temperature zones, wherein the temperature of the first temperature zone is 60 ℃, the temperature of the second temperature zone is 80 ℃, the temperature of the third temperature zone is 100 ℃, and the temperature of the fourth temperature zone is 120 ℃.

Example two

100 parts of silicone resin with solid content of 50 percent are weighed. 200 parts of a 1 μm thick aluminum ferrosilicon powder having a sheet diameter of 40 μm were weighed out. 10 parts of a dispersing agent is weighed. And weighing 5 parts of the leveling agent. Weighing 5 parts of wetting agent. 0.1 part of catalyst is weighed. 5 parts of defoaming agent are weighed. Adding into a high-speed dispersion machine together for dispersion, taking out after 1 hour of dispersion, and standing. Standing for 1 hour, and defoaming in a vacuum defoaming machine. And (5) defoaming to obtain the slurry.

And (3) putting the prepared slurry into a slurry box, and adjusting the height of a scraper of a casting machine to be 2mm, wherein the casting speed is 3 m/min.

And an electromagnet is arranged at a position 10cm away from the discharge port of the scraper of the casting machine, and the period of the electromagnet is set to 2000 hz. The casting waterproof rubber mat vibrates through a magnetic field. An eccentric wheel is arranged 20cm away from a discharge port of a scraper of the casting machine, and the period of the eccentric wheel is set to be 1000 hz. The casting waterproof rubber mat is subjected to high-frequency shaking. The schematic structure is shown in fig. 1.

And (4) the vibrated waterproof rubber mat enters an oven for drying and curing reaction. The oven is set with multiple temperature zones, the first temperature zone is set with 60 ℃, the second temperature zone is set with 80 ℃, the third temperature zone is set with 100 ℃, and the fourth temperature zone is set with 120 ℃. Each temperature zone was baked for 30 minutes.

And (3) guiding the dried waterproof rubber gasket into continuous molding equipment, and continuously punching the waterproof rubber gasket into an annular rubber gasket to finally form the waterproof rubber gasket with electromagnetic wave absorption and anti-interference functions.

In the waterproof rubber mat, the mass percentage of the magnetic absorbent is 50 to 80 percent. The magnetic absorbent is composed of one or more of spherical or flaky iron-based metal powder, spherical or flaky iron-based alloy powder, spherical or flaky iron-silicon-aluminum alloy powder, spherical or flaky iron-silicon alloy powder, spherical or flaky iron-silicon-chromium alloy powder, spherical or flaky cobalt-based alloy powder, spherical or flaky iron-nickel alloy powder, carbon fiber, iron-based alloy fiber and glass fiber. In the waterproof rubber mat, the high molecular polymer accounts for 5-50% of the mass of the waterproof rubber mat, and is one or more of polyurethane resin, silicon resin, organic silicon resin, acrylic resin, epoxy resin, polyimide and ethylene-vinyl acetate copolymer. The magnetic material is prepared into the rubber mat in a coating mode. The coating mode is one or more of blade casting coating, lip extrusion coating, transfer coating and base film immersion coating. The thickness of the prepared magnetic film ranges from 0.5mm to 1 mm.

Magnetic oscillation of the waterproof rubber mat: before the magnetic film is not dried, the prepared magnetic film is subjected to high-frequency oscillation by a high-frequency oscillation magnetic field with oscillation frequency of 1000-.

High-frequency shaking of the waterproof rubber mat: before the magnetic film is not dried, the prepared magnetic film is subjected to high-frequency vibration at the vibration frequency of 500-2000hz to perform high-frequency vibration on the magnetic powder in the waterproof rubber mat, so that the magnetic absorbent in the waterproof rubber mat is densified.

Drying and curing reaction of the waterproof rubber mat: and (3) carrying out drying and curing reaction on the waterproof rubber mat subjected to magnetic field and physical vibration/shaking, wherein the drying is carried out by a multi-temperature-zone drying tunnel, and the drying temperature is from low to high and ranges from 40 ℃ to 180 ℃.

And (3) waterproof gasket molding: and (3) guiding the dried waterproof rubber mat into a die cutting mechanism, and performing hollow die cutting on the waterproof rubber mat prepared by the coiled material according to the peripheral size of the plug connector to form a ring, thereby finally forming the waterproof gasket with the electromagnetic wave absorption and anti-interference functions.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.