CN104934162B - The lubricating process of enamel-covered wire - Google Patents

Abstract

The invention discloses a lubricating process for enameled wire, which includes the following steps: (1) Surface pretreatment: put the cooled enameled wire from one end of a rectangular airtight cavity storing dry ice and pass it out from the other end, using the low temperature environment created by dry ice Cool the enameled wire again, control the forward speed of the enameled wire to 4‑6m/min, and the length*width*height of the sealed cavity is 3m*1m*0.6m. The volume of the rectangular sealed cavity occupied by dry ice is 1/3‑1/ 5; (2), coating base film; (3), coating lubricating oil. Beneficial effects of the present invention Firstly use the sponge tube to attach the base film to the surface of the enameled wire, improve the molecular bonding force between the enameled wire and the lubricating oil, make the lubricating oil evenly distributed on the surface of the enameled wire, and improve the use efficiency of the lubricating oil; use the sponge tube coating liquid to ensure When the lubricating oil touches the enameled wire, it covers 360° without dead angle, realizing the full coverage of the enameled wire with lubricating oil.

Description

Lubrication process of enameled wire

technical field

The invention relates to the field of enameled wire production, in particular to a lubricating process for enameled wires.

Background technique

Enameled wire is a main variety of winding wire, which is composed of conductor and insulating layer. After the bare wire is annealed and softened, it is painted and baked many times. However, it is not easy to produce products that meet both standard requirements and customer requirements. It is affected by factors such as raw material quality, process parameters, production equipment, and the environment. Therefore, the quality characteristics of various enameled wires are different, but they all have Mechanical properties, chemical properties, electrical properties, thermal properties four major properties. The process flow of the enameled wire is as follows: unwinding→annealing→painting→baking→cooling→lubrication→reeling, in which the lubrication of the enameled wire has a great relationship with the tightness of the reeling. The lubricant used in the enameled wire is required to make the surface of the enameled wire slippery, have no harm to the wire, and do not affect the strength of the take-up reel and the use of the user. The ideal amount of oil should be so that the enameled wire feels slippery, but no obvious oil can be seen on the hand. However, the existing lubrication methods often fail to meet such requirements. The lubricating oil on the surface of the enameled wire is evenly distributed. On the one hand, it will cause waste of lubricating oil, and on the other hand, it will affect the quality of subsequent winding.

Contents of the invention

The technical problem to be solved by the present invention is that the enameled wire lubricated by the existing enameled wire lubrication method cannot reach the specified standard, resulting in waste of lubricating oil and affecting the quality of the wire take-up. Therefore, a lubricating process for the enameled wire is provided.

The technical solution of the present invention is: the lubrication process of enameled wire, which includes the following steps: (1), surface pretreatment: put the cooled enameled wire from one end of the rectangular airtight cavity storing dry ice and pass it out from the other end, and use dry ice to create Cool the enameled wire again in a low temperature environment, control the forward speed of the enameled wire to 4-6m/min, and the length*width*height of the sealed cavity is 3m*1m*0.6m. The volume of the rectangular sealed cavity occupied by dry ice is 1/3 -1/5; (2) Coating base film: select a sponge tube with a length of 0.3-0.5m and an inner diameter suitable for the outer diameter of the enameled wire, soak it in 20-30wt% methyl salicylate solution for 10-20min Take it out, let the enameled wire pass through the sponge tube to form a base film on the surface of the enameled wire; (3), apply lubricating oil: take a sponge tube with a length of 0.4-0.6m whose inner diameter matches the outer diameter of the enameled wire, and soak it in lubricating oil for 15- Take it out after 25 minutes, let the enameled wire pass through the sponge tube to form a lubricating oil coating on the surface of the enameled wire.

Beneficial effects of the present invention Firstly use the sponge tube to attach the base film to the surface of the enameled wire, improve the molecular bonding force between the enameled wire and the lubricating oil, make the lubricating oil evenly distributed on the surface of the enameled wire, and improve the use efficiency of the lubricating oil; use the sponge tube coating liquid to ensure When the lubricating oil touches the enameled wire, it covers 360° without dead angle, realizing the full coverage of the enameled wire with lubricating oil.

detailed description

The present invention will be further described below in conjunction with embodiment.

Example 1: (1) Surface pretreatment: the cooled enameled wire is passed through one end of the rectangular airtight cavity storing dry ice and passed out from the other end, and the enameled wire is cooled again by using the low temperature environment created by dry ice to control the enameled wire's progress The speed is 4m/min, and the length*width*height of the airtight chamber is 3m*1m*0.6m. The volume of the rectangular airtight chamber occupied by dry ice is 1/3; (2), coating base film: select the inner diameter of 0.3m long The sponge tube suitable for the outer diameter of the enameled wire is soaked in 20wt% methyl salicylate solution for 10 minutes, then taken out, and the enameled wire passes through the sponge tube to form a base film on the surface of the enameled wire; (3), apply lubricating oil: take A sponge tube with a length of 0.4m and an inner diameter suitable for the outer diameter of the enameled wire is soaked in lubricating oil for 15 minutes, then taken out, and the enameled wire passes through the sponge tube to form a lubricating oil coating on the surface of the enameled wire.

Example 2: (1) Surface pretreatment: the cooled enameled wire is passed through one end of the rectangular airtight cavity storing dry ice and passed out from the other end, and the enameled wire is cooled again by using the low temperature environment created by dry ice to control the enameled wire's progress The speed is 5m/min, and the length*width*height of the airtight chamber is 3m*1m*0.6m. The volume of the rectangular airtight chamber occupied by dry ice is 1/4; (2), coating the base film: select the length 0.4m inner diameter For a sponge tube suitable for the outer diameter of the enameled wire, soak it in 25wt% methyl salicylate solution for 15 minutes and take it out, let the enameled wire pass through the sponge tube to form a base film on the surface of the enameled wire; (3), apply lubricating oil: take A sponge tube with a length of 0.5m whose inner diameter matches the outer diameter of the enameled wire is soaked in lubricating oil for 20 minutes, then taken out, and the enameled wire passes through the sponge tube to form a lubricating oil coating on the surface of the enameled wire.

Example 3: (1) Surface pretreatment: the cooled enameled wire is passed through one end of the rectangular airtight cavity storing dry ice and passed out from the other end, and the enameled wire is cooled again by using the low temperature environment created by dry ice to control the enameled wire's progress The speed is 6m/min, and the length*width*height of the airtight chamber is 3m*1m*0.6m. The volume of the rectangular airtight chamber occupied by dry ice is 1/5; (2), coating the base film: select the length 0.5m inner diameter The sponge tube suitable for the outer diameter of the enameled wire is soaked in 30wt% methyl salicylate solution for 20 minutes, then taken out, and the enameled wire passes through the sponge tube to form a base film on the surface of the enameled wire; (3), apply lubricating oil: take A sponge tube with a length of 0.6m whose inner diameter matches the outer diameter of the enameled wire is soaked in lubricating oil for 25 minutes, then taken out, and the enameled wire passes through the sponge tube to form a lubricating oil coating on the surface of the enameled wire.

The purpose of the surface pretreatment step of the present invention is to cool the enameled wire again. The enameled wire coming out of the oven has a high temperature, a very soft paint film and a low strength. If it is not cooled in time, the paint film will be damaged after passing through the guide wheel. , affecting the quality of the enameled wire. When the line speed is relatively slow, as long as there is a cooling section of a certain length, the enameled wire can be cooled naturally. When the line speed is fast, the natural cooling cannot meet the requirements, and forced cooling is necessary, otherwise the line speed cannot be increased. Existing forced cooling generally uses air cooling, but the air cooling time is too short, and often cannot achieve the effect of completely cooling the enameled wire. Therefore, the present invention designs a rectangular airtight cavity filled with dry ice after air cooling, and uses dry ice to cool the enameled wire. The low temperature environment created fully cools the passing enameled wire. The volume of the rectangular airtight cavity and the volume occupied by the filled dry ice are the best specifications obtained through repeated tests. If the size of the rectangular airtight cavity is too large, the dry ice If the volume is too small, the cooling effect will not be good. If the size of the rectangular airtight cavity is too small, the volume occupied by the dry ice will easily shrink and harden the enameled wire, which is not conducive to the subsequent winding; the second purpose of the surface pretreatment step is to The surface of the enameled wire is dedusted, and the low-temperature environment created by dry ice makes the impurities on the surface of the enameled wire cool and shrink and then separate from the enameled wire, without causing damage to the surface of the enameled wire.

The purpose of step 2 of the present invention is to put a layer of base film on the enameled wire, ensure the smoothness and roundness of the surface of the enameled wire, and provide a good carrier for coating lubricating oil. Make the lubricating oil form a uniform and comprehensive film layer on the surface of the base film, achieve full coverage of the enameled wire with the least amount of lubricating oil, and improve the utilization rate of the lubricating oil.

The invention uses the sponge tube as a coating tool to coat the base film and lubricating oil on the surface of the enameled wire, so as to ensure that the outer surface of the enameled wire can be coated with one touch, and improve the uniformity of the lubricating oil on the surface of the enameled wire. The surface of the coated enameled wire is smooth and feels good no fuel.

Claims (1)

1. The lubrication process of enameled wire is characterized in that it includes the following steps: (1), surface pretreatment: put the cooled enameled wire from one end of the rectangular airtight cavity storing dry ice and pass it out from the other end, using the low temperature created by dry ice The environment cools the enameled wire again, and the forward speed of the enameled wire is controlled to be 4-6m/min. The length*width*height of the airtight cavity is 3m*1m*0.6m, and the proportion of dry ice in the rectangular airtight chamber is 1/3- 1/5; (2) Coating base film: select a sponge tube with a length of 0.3-0.5m and an inner diameter compatible with the outer diameter of the enameled wire, soak it in 20-30wt% methyl salicylate solution for 10-20min Take it out, let the enameled wire pass through the sponge tube to form a base film on the surface of the enameled wire; (3), apply lubricating oil: take a sponge tube with a length of 0.4-0.6m and an inner diameter matching the outer diameter of the enameled wire, soak it in lubricating oil for 15 -Take it out after 25 minutes, let the enameled wire pass through the sponge tube to form a lubricating oil coating on the surface of the enameled wire.