阅读说明：本技术 一种电机定子线圈整体环氧树脂塑封工艺 (Motor stator coil integral epoxy resin plastic package process ) 是由 曹琨 于 2020-12-23 设计创作，主要内容包括：本发明涉及环氧树脂塑封技术领域,公开了一种电机定子线圈整体环氧树脂塑封工艺,其具体工艺为先将下好线的线圈用捆扎带固定好,固定时放大捆扎带捆扎的间隙,利于胶充分流入线包内部,然后再将灌封胶A组分和B组分按一定配比混合进行灌封；有益效果在于：通用性强,防尘防水防磕碰,还具有防止仿造的优势,外观美观,整体性强,并且在灌封胶中还添加有导热粉末,帮助电机线包进行散热。(The invention relates to the technical field of epoxy resin plastic package, and discloses a motor stator coil integral epoxy resin plastic package process, which comprises the following steps of fixing a coil of a lower wire by using a strapping tape, enlarging a gap strapped by the strapping tape during fixing, facilitating glue to fully flow into the inside of the wire package, and then mixing a component A and a component B of pouring glue according to a certain proportion for pouring and sealing; has the advantages that: the heat-conducting powder is added into the pouring sealant, so that the heat dissipation of the motor coil is facilitated.)

1. The integral epoxy resin plastic package process for the stator coil of the motor is characterized by comprising the following steps of: the process comprises the following steps:

a. firstly, fixing a coil with a lower wire by using a strapping tape, and enlarging a strapping gap of the strapping tape during fixing so as to facilitate the glue to fully flow into the inside of the coil;

b. cleaning and drying the plastic package mold, and then respectively and sequentially installing the mandrel and the shell on the bottom cover;

c. spraying or coating a release agent on the contact surfaces of the mandrel, the bottom cover and the shell stator to ensure the release agent to be uniform, then putting the motor coil into a mounted die from top to bottom, taking care to regularly place the stator leads at the upper end of the die, and fixing the stator leads by using a binding tape to prevent the stator leads from moving during curing;

d. weighing the component A in the pouring sealant, putting the weighed component A into a cup-shaped metal container, putting the container and the assembled die stator into an oven, heating to 80-100 ℃, and maintaining for about 20 min;

e. when the room temperature is lower than 25 ℃, the component B also needs to be properly preheated;

f. after the step is finished, taking out the container, weighing the component B according to the proportion, adding the component B into the container, and fully stirring to ensure that the components are uniformly mixed, wherein the total volume of the component A and the component B cannot exceed 2/3 of the container;

g. after stirring and mixing, putting the container and the assembled mould into vacuum equipment together for vacuum defoaming, wherein the defoaming time is about 10min, and the vacuum degree reaches-0.095 Mpa;

h. after the step is finished, deflating and recovering the atmospheric pressure, vacuumizing again, starting a vacuum pouring process in a vacuum environment, slowly pouring the mixed liquid into the mold from top to bottom, paying attention to the fact that the mixed liquid cannot exceed the marked scale mark during pouring, replenishing again after the liquid level is reduced, replenishing to the scale mark every time, repeatedly operating until the liquid level does not drop any more, releasing the pressure, recovering the atmospheric pressure, vacuumizing again and repeatedly operating, and replenishing glue in the vacuum environment again if the liquid level is reduced in the process until the page does not drop;

i. after the box is opened to check the liquid level, taking out the mold, putting the mold into a horizontal oven, heating to 70-80 ℃, and curing for 2-3 h;

j. during the period, tools and containers are tidied and cleaned, after the containers are heated for 1 hour, an oven is opened to check the liquid level, and if the liquid level is reduced, the containers need to be supplemented in time;

k. after heating and solidification are finished, the die is naturally cooled in an oven for 12 hours, then the die is taken out for disassembly and assembly, and the die and the well plastic-packaged motor cannot be damaged by paying attention during disassembly and assembly.

2. The process for integrally molding the epoxy resin on the stator coil of the motor according to claim 1, wherein the process comprises the following steps: the pouring sealant is polyurethane pouring sealant.

3. The process for integrally molding the epoxy resin on the stator coil of the motor according to claim 1, wherein the process comprises the following steps: the ratio of the component A to the component B in the pouring sealant is 5: 1.

Technical Field

The invention relates to the technical field of epoxy resin plastic package, in particular to a motor stator coil integral epoxy resin plastic package process.

Background

The existing motor coil is basically processed by adopting an insulating varnish impregnation drying treatment mode after shaping, and although the mode is simple and rapid, the mode cannot meet a plurality of harsh working conditions, such as a very humid environment, a dust-rich environment and the like, the service life of the impregnated motor coil in the environment is shortened, and the impregnated motor coil is very easy to burn or short-circuit.

Disclosure of Invention

The invention aims to solve the problems and provide a process for integrally molding the stator coil of the motor by using epoxy resin.

The invention realizes the purpose through the following technical scheme:

a process for plastic package of the whole epoxy resin of a stator coil of a motor comprises the following steps:

a. firstly, fixing a coil with a lower wire by using a strapping tape, and enlarging a strapping gap of the strapping tape during fixing so as to facilitate the glue to fully flow into the inside of the coil;

b. cleaning and drying the plastic package mold, and then respectively and sequentially installing the mandrel and the shell on the bottom cover;

c. spraying or coating a release agent on the contact surfaces of the mandrel, the bottom cover and the shell stator to ensure the release agent to be uniform, then putting the motor coil into a mounted die from top to bottom, taking care to regularly place the stator leads at the upper end of the die, and fixing the stator leads by using a binding tape to prevent the stator leads from moving during curing;

d. weighing the component A in the pouring sealant, putting the weighed component A into a cup-shaped metal container, putting the container and the assembled die stator into an oven, heating to 80-100 ℃, and maintaining for about 20 min;

e. when the room temperature is lower than 25 ℃, the component B also needs to be properly preheated;

f. after the step is finished, taking out the container, weighing the component B according to the proportion, adding the component B into the container, and fully stirring to ensure that the components are uniformly mixed, wherein the total volume of the component A and the component B cannot exceed 2/3 of the container;

g. after stirring and mixing, putting the container and the assembled mould into vacuum equipment together for vacuum defoaming, wherein the defoaming time is about 10min, and the vacuum degree reaches-0.095 Mpa;

h. after the step is finished, deflating and recovering the atmospheric pressure, vacuumizing again, starting a vacuum pouring process in a vacuum environment, slowly pouring the mixed liquid into the mold from top to bottom, paying attention to the fact that the mixed liquid cannot exceed the marked scale mark during pouring, replenishing again after the liquid level is reduced, replenishing to the scale mark every time, repeatedly operating until the liquid level does not drop any more, releasing the pressure, recovering the atmospheric pressure, vacuumizing again and repeatedly operating, and replenishing glue in the vacuum environment again if the liquid level is reduced in the process until the page does not drop;

i. after the box is opened to check the liquid level, taking out the mold, putting the mold into a horizontal oven, heating to 70-80 ℃, and curing for 2-3 h;

j. during the period, tools and containers are tidied and cleaned, after the containers are heated for 1 hour, an oven is opened to check the liquid level, and if the liquid level is reduced, the containers need to be supplemented in time;

k. after heating and solidification are finished, the die is naturally cooled in an oven for 12 hours, then the die is taken out for disassembly and assembly, and the die and the well plastic-packaged motor cannot be damaged by paying attention during disassembly and assembly.

Preferably: the pouring sealant is polyurethane pouring sealant.

Preferably: the ratio of the component A to the component B in the pouring sealant is 5: 1.

Compared with the prior art, the invention has the beneficial effects that: the heat-conducting powder is added into the pouring sealant, so that the heat dissipation of the motor coil is facilitated.

Detailed Description

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, and the two elements may be communicated with each other, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art through specific situations.

The invention is further illustrated below:

a process for plastic package of the whole epoxy resin of a stator coil of a motor comprises the following steps:

a. firstly, fixing a coil with a lower wire by using a strapping tape, and enlarging a strapping gap of the strapping tape during fixing so as to facilitate the glue to fully flow into the inside of the coil;

b. cleaning and drying the plastic package mold, and then respectively and sequentially installing the mandrel and the shell on the bottom cover;

c. spraying or coating a release agent on the contact surfaces of the mandrel, the bottom cover and the shell stator to ensure the release agent to be uniform, then putting the motor coil into a mounted die from top to bottom, taking care to regularly place the stator leads at the upper end of the die, and fixing the stator leads by using a binding tape to prevent the stator leads from moving during curing;

d. weighing the component A in the pouring sealant, putting the weighed component A into a cup-shaped metal container, putting the container and the assembled die stator into an oven, heating to 80-100 ℃, and maintaining for about 20 min;

e. when the room temperature is lower than 25 ℃, the component B also needs to be properly preheated;

f. after the step is finished, taking out the container, weighing the component B according to the proportion, adding the component B into the container, and fully stirring to ensure that the components are uniformly mixed, wherein the total volume of the component A and the component B cannot exceed 2/3 of the container;

g. after stirring and mixing, putting the container and the assembled mould into vacuum equipment together for vacuum defoaming, wherein the defoaming time is about 10min, and the vacuum degree reaches-0.095 Mpa;

h. after the step is finished, deflating and recovering the atmospheric pressure, vacuumizing again, starting a vacuum pouring process in a vacuum environment, slowly pouring the mixed liquid into the mold from top to bottom, paying attention to the fact that the mixed liquid cannot exceed the marked scale mark during pouring, replenishing again after the liquid level is reduced, replenishing to the scale mark every time, repeatedly operating until the liquid level does not drop any more, releasing the pressure, recovering the atmospheric pressure, vacuumizing again and repeatedly operating, and replenishing glue in the vacuum environment again if the liquid level is reduced in the process until the page does not drop;

i. after the box is opened to check the liquid level, taking out the mold, putting the mold into a horizontal oven, heating to 70-80 ℃, and curing for 2-3 h;

j. during the period, tools and containers are tidied and cleaned, after the containers are heated for 1 hour, an oven is opened to check the liquid level, and if the liquid level is reduced, the containers need to be supplemented in time;

k. after heating and solidification are finished, the die is naturally cooled in an oven for 12 hours, then the die is taken out for disassembly and assembly, and the die and the well plastic-packaged motor cannot be damaged by paying attention during disassembly and assembly.

Wherein the pouring sealant is polyurethane pouring sealant; the ratio of the component A to the component B in the pouring sealant is 5: 1.

The mechanical strength of the epoxy resin and the whole enameled wire in the motor stator product manufactured by the process is higher than that of a motor stator produced by the traditional process, no gap exists between the cured epoxy resin and the whole enameled wire and an iron core, namely the enameled wire is not loosened, the enameled wire is not loosened even if the enameled wire is subjected to larger electromagnetic impact, the product quality is ensured, the service life of the motor is prolonged, meanwhile, the heat conductivity coefficient of the epoxy resin is higher than that of insulating paint, and the gap between the iron core and the enameled wire can be completely filled, so that the heat conduction effect of the motor is greatly improved, the temperature rise is reduced, the heat conductivity is good, the motor is prevented from being burnt, and the service life of the motor is prolonged.

While there have been shown and described what are at present considered to be the fundamental principles of the invention, its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is to be accorded the full scope of the invention as hereinafter claimed.