Two-color character wheel for preventing reflective material falling off and manufacturing method thereof
A technology of reflective materials and manufacturing methods, applied in the field of character wheels, can solve problems such as erosion, affecting accurate reading of measurement values, and 200' off-reflective tape, so as to achieve the effect of ensuring accurate counting
Inactive Publication Date: 2011-11-30
SHENZHEN XINGYUAN INTELLIGENT INSTR TECH
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Problems solved by technology
[0003] In the prior art, the reflective tape 200' is printed on the cylindrical surface of the light-absorbing tape 110' of the character wheel 300' by silk screen printing or hot stamping. If it is used for a long time or even in a harsh environment, the reflective tape 200' will fall off or be eroded , which directly affects the accurate reading of metering values
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[0025] Further details will be given below in conjunction with the embodiments shown in the accompanying drawings.
[0026] The invention relates to a method for manufacturing a two-color character wheel that prevents reflective materials from falling off. It is based on a two-color injection molding machine and a two-color character wheel mould. Secondary injection mold, and is installed on the fixed plate of movable mold, rotates by this fixed plate of movable mold, switches between using primary injection mold and secondary injection mold; Especially described method comprises the following steps:
[0027] A. The two-color character wheel mold is installed on the movable mold fixed plate;
[0028] B. Inject synthetic material capable of absorbing light into the cavity of the primary injection mold, thereby injection molding the dark character wheel body;
[0029] The character wheel body includes a cylindrical number column, a rotating shaft column and a toggle column; the...
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Abstract
A two-color character wheel for preventing reflective material from falling off and a manufacturing method thereof, the two-color character wheel (300) includes a dark character wheel body (100) made of a synthetic material capable of absorbing light and a dark character wheel body (100) made of a synthetic material capable of reflecting light light colored reflective ring post (200). The character wheel body (100) includes a number cylinder (111) and a light-absorbing cylinder (112), and a cylindrical groove (113) is arranged on the light-absorbing cylinder (112); the reflective ring column (200 ) is a section of annular cylinder that fits with the cylindrical surface groove (113) and is fused together. The reflective ring column (200) is integrally formed with the character wheel body (100) by means of a two-color injection molding process. In the present invention, the reflective ring post (200) used as the reflective material does not fall off from the character wheel body (100), which ensures accurate counting of the metering device.
Description
technical field [0001] The present invention relates to a character wheel used in measuring instruments for displaying and measuring values, in particular to a two-color character wheel for measuring the rotation amount of the character wheel by means of the light-absorbing and reflecting areas on the surface of the character wheel. Background technique [0002] The character wheel is a common part of the measuring instrument used to display and measure the value, and it is mostly used for billing measuring instruments, such as electric energy meters, water meters, gas meters, etc. The surface of the character wheel is provided with a digital code, and a plurality of character wheels are combined to display a combination of multi-digit digital codes to provide users with metering display for manual reading; meanwhile, in order to realize metering automation, the prior art also uses a variety of character wheel The sensing method of the rotation angle realizes automatic readi...
Claims
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IPC IPC(8): B29C45/16B29C45/06B29C45/10G01D13/00B29K105/30B29K105/00
Inventor 张系强刘清波李怡凡
Owner SHENZHEN XINGYUAN INTELLIGENT INSTR TECH