Rotary tin plating mechanism

Abstract

The invention discloses a rotary tin plating mechanism which comprises a high-temperature tin furnace and a rotating mechanism, a scraper and a tin slag baffle are placed in the high-temperature tin furnace, the rotating mechanism is used for driving the high-temperature tin furnace to rotate, the high-temperature tin furnace rotates relative to the scraper and the tin slag baffle, and the high-temperature tin furnace is provided with an impeller. The tin furnace is changed to rotate, liquid tin in the tin furnace flows slowly after the tin furnace rotates, tin slag below the scraper and the copper foil can be brought out, the tin slag baffle is arranged in the opposite direction of the scraper for blocking, and the tin slag is manually and regularly cleaned in front of the scraper, so that the copper foil in which the tin slag moves cannot be influenced.

Description

Technical Field

[0001] This invention belongs to the technical field of tin plating equipment, and specifically relates to a rotary tin plating mechanism. Background Technology

[0002] In the manufacturing process of voice coil frames, tin-plated copper foil is required. Tin plating is a high-temperature physical process where tin is heated to a liquid temperature of 260-320℃, flux is applied to one side of the copper foil substrate, and then it is passed through a tin bath for tinning. A scraper on the surface of the tin bath controls the thickness. After cooling, the tinning is complete. This method involves physical heating for tinning and a scraper to control the thickness. However, the flux reacts chemically with the copper substrate and the high-temperature liquid tin. During this chemical reaction, copper powder remains on the copper substrate, and there is a high-temperature oxidation reaction between the flux and tin, as well as surface oxidation during the tin heating process. Over time, these high-temperature reactions accumulate, resulting in severe tin dross buildup on the tin bath surface. This dross remains on the surface of the finished tin-plated product. Traditional scrapers use a stationary tin bath and a stationary scraper. As the length of the copper foil increases and more flux is added, a large amount of dross is generated on the tin bath surface. Furthermore, the area beneath the copper foil must not be touched during dross cleaning, otherwise the thickness will be affected, making dross cleaning difficult. Increased dross negatively impacts the gloss of the tin-plated surface and solderability.

[0003] To address the issue of slag accumulation on the surface of continuously tin-plated copper foil as more flux is carried in with the copper foil, it's crucial to understand that while slag can be cleaned from the open areas of the tin bath, it's impossible to remove the slag from the copper foil and under the scraper. Cleaning this slag directly onto the copper foil will affect the tin plating thickness. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary tin plating mechanism to solve the problems mentioned in the background section. To achieve the above objective, this invention provides the following technical solution: A rotary tin plating mechanism includes a high-temperature tin furnace and a rotating mechanism. The high-temperature tin furnace contains a scraper and a tin dross baffle. The rotating mechanism drives the high-temperature tin furnace to rotate relative to the scraper and the tin dross baffle. The high-temperature tin furnace is equipped with an impeller.

[0005] Furthermore, the rotating mechanism includes a fixed base, a motor, and a rotating shaft, the rotating shaft being connected to the high-temperature tin furnace and driven by the motor.

[0006] Furthermore, a transmission gear is provided between the motor and the rotating shaft.

[0007] Furthermore, the transmission gear includes a driving gear and a driven gear, wherein the diameter of the driving gear is larger than the diameter of the driven gear.

[0008] Furthermore, the motor is a three-phase asynchronous motor.

[0009] Furthermore, the high-temperature tin furnace is equipped with a heat insulation layer.

[0010] Furthermore, a bearing is provided between the fixed base and the rotating shaft.

[0011] Beneficial effects: The modified tin furnace rotates, and the molten tin inside flows slowly, effectively carrying away tin dross from under the scraper and copper foil. A dross baffle is installed opposite the scraper to block it, and manual periodic cleaning of dross in front of the scraper does not affect the copper foil conveyor inside. Previously, with a fixed tin furnace and scraper, tin plating was stopped after less than one hour to clean dross, resulting in some poor tin plating. The improved system allows for continuous tin plating for over four hours, reducing defects and significantly improving stability. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of a rotating tin plating mechanism according to the present invention; Figure 2 This is a cross-sectional view of a rotating tin plating mechanism according to the present invention.

[0014] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figure 1 and 2 As shown, this embodiment provides a rotary tin plating mechanism, including a high-temperature tin furnace 1 and a rotary mechanism 2. The high-temperature tin furnace 1 is equipped with a scraper 3 and a tin dross baffle 4. The rotary mechanism 2 is used to drive the high-temperature tin furnace 1 to rotate. The high-temperature tin furnace 1 rotates relative to the scraper 3 and the tin dross baffle 4. The high-temperature tin furnace 1 is equipped with an impeller 5.

[0017] The rotating mechanism 2 drives the high-temperature tin furnace 1 to rotate synchronously. After the high-temperature tin furnace 1 heats the tin to a liquid state, it is driven to rotate slightly by the internal impeller 5. The copper foil sample 6 is placed on the scraper 3 and moves at a uniform speed to achieve tin plating. The height of the scraper 3 can be adjusted in actual applications. The thickness of the tin plating can be achieved by adjusting the height. There are many mechanisms for adjusting the height, such as a screw adjustment mechanism. At the same time, a tin dross baffle is set to collect tin dross.

[0018] In a further embodiment of the present invention, the rotating mechanism 2 includes a fixed base 21, a motor 22, and a rotating shaft 23. The rotating shaft 23 is connected to the high-temperature tin furnace 1 and is driven by the motor 22. The motor 22 is a three-phase asynchronous motor, and the machine speed is controlled by a frequency converter.

[0019] In a further embodiment of the present invention, a transmission gear 24 is provided between the motor and the rotating shaft 23. The transmission gear includes a driving gear 241 and a driven gear 242. The motor gearbox reduces speed and drives the driving gear 241, which in turn drives the driven gear 242, which in turn drives the rotating shaft 23. This achieves uniform rotation of the rotating shaft, and the speed can be adjusted arbitrarily. The purpose of setting up gear transmission is that the motor shaft and the rotating shaft are vertical, and the two shafts are installed in parallel for transmission. If they were installed vertically in a straight line, the overall size of the mechanism would be longer, and the installation of the entire mechanism would be restricted. Parallel installation saves length space. During operation, the two rotating shafts are vertically parallel. If chain and sprocket transmission or synchronous belt transmission is selected, the chain and synchronous belt move horizontally. The belt and chain between the two wheels may sag slightly if they are loose. If no limit is set, the shaft will deviate with rotation. This increases the difficulty of installation and debugging. Rotary gear transmission is a fixed rigid transmission, which is more precise and has no backlash. There is no adjustable position. The motor mounting bracket is equipped with pin positioning, making installation or maintenance more convenient.

[0020] In a further embodiment of the present invention, the high-temperature tin furnace 1 is equipped with a heater 11, and the rotating shaft 23 is fitted with a conductive slip ring 231. The inner shaft of the conductive slip ring rotates synchronously with the rotating shaft. An external temperature control system is required to transmit the main power supply for heating the tin furnace and the thermocouple signal for temperature measurement synchronously during rotation. The conductive slip ring enables the transmission of signals and power supply during rotation. The conductive slip ring connects the main power supply for heating the tin furnace and the thermocouple signal. The principle is that a heating temperature controller is installed in the electrical control system. After collecting the thermocouple signal, the temperature controller uses PID control to output a signal to a solid-state relay. The solid-state relay controls the on / off state of the main power supply to the tin furnace heater, thereby achieving constant temperature control. The conductive slip ring solves the problem of stable signal transmission during rotation.

[0021] In a further embodiment of the present invention, the high-temperature tin furnace 1 is provided with a heat insulation layer 12.

[0022] In a further embodiment of the present invention, a bearing 25 is provided between the fixed base 21 and the rotating shaft 23.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. The scope of protection of the present invention should be determined by the scope of the claims. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A rotary tin plating mechanism, characterized in that: The device includes a high-temperature tin furnace and a rotating mechanism. The high-temperature tin furnace contains a scraper and a tin dross baffle. The rotating mechanism drives the high-temperature tin furnace to rotate relative to the scraper and the tin dross baffle. The high-temperature tin furnace is equipped with an impeller.

2. The rotary tin plating mechanism according to claim 1, characterized in that: The rotating mechanism includes a fixed base, a motor, and a rotating shaft. The rotating shaft is connected to the high-temperature tin furnace and is driven by the motor.

3. The rotary tin plating mechanism according to claim 2, characterized in that: A transmission gear is provided between the motor and the rotating shaft.

4. The rotary tin plating mechanism according to claim 2, characterized in that: The transmission gear includes a driving gear and a driven gear, wherein the diameter of the driving gear is larger than the diameter of the driven gear.

5. A rotary tin plating mechanism according to claim 2, characterized in that: The motor is a three-phase asynchronous motor.

6. The rotary tin plating mechanism according to claim 2, characterized in that: The high-temperature tin furnace is equipped with a heat insulation layer.

7. A rotary tin plating mechanism according to claim 2, characterized in that: A bearing is provided between the fixed base and the rotating shaft.

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