Injection moulding method of digit wheel and mould thereof

An injection molding and digital wheel technology, applied in the field of injection molds, can solve problems such as low production efficiency, high labor cost, and wear and tear, and achieve the effects of increased production efficiency, reduced labor cost, and stable quality

CN101659103AInactive Publication Date: 2010-03-03宇科模具(厦门)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-03-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an injection moulding method of a digit wheel and a mould thereof. The method comprises the following steps: closing and molding a font front mould and a rear mould, opening the font front mould and the rear mould, rotating a rotating disc of a double-colored injection machine, rotating the rear mould to a second forming position, closing and molding the rear mould and a wheel body front mould, opening the wheel body front mould and the rear mould, pushing a product out, rotating the rear mould to a first forming position, and the like. The digit wheel mould comprises the front mould and the rear mould, wherein the front mould is a font core front mould, and the rear mould is a font core rear mould. By adopting the digit wheel mould, plastic digits on a digital display measuring meter can not be printed on the surface of the product by a rotary printing process any more, but the model product produced by directly adopting the digit wheel mould, therefore, not only the production process for producing the digit display measuring meter is reduced, the cost is saved, but also any pollution to the environment can not be generated, and the mould is very economicand practical.
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Description

technical field

[0001] The invention relates to an injection mold, in particular to a digital wheel injection molding method and a mold thereof. Background technique

[0002] At present, the plastic numbers on the digital display measuring instruments in China are all injection-molded, and symbols such as numbers or scales are printed on the products with a rotary printing process. The so-called rotary printing is completed by pad printing, silk screen printing, hot stamping and other processes. To complete this process, not only a large amount of chemical auxiliary items such as ink and film are required, but also a large number of manual operations are required. In this way, the rotary printing process is used. There are following disadvantages in realizing digital display plastic numbers on measuring instruments: on the one hand, due to the application of a large number of chemical auxiliary items such as inks and films, volatile toxic and harmful gases will be produced, ...

Examples

Embodiment Construction

[0028] Such as Figure 10 As shown, the present invention is a kind of digital wheel injection molding method, and it is to install two sets of front molds with different cavity structures and two sets of rear molds with the same structure on the two-color injection molding machine, and the two sets of front molds are respectively used for injection molding. The font front mold for forming fonts and the wheel body front mold for injection molding the wheel body, the molding steps are as follows: (1) the font front mold 101 and the rear mold 103 are injection molded, and the font parts 50 (such as Figure 11A shown); (2) the font front mold 101 and the rear mold 103 are opened, and the font parts 50 are still retained in the cavity of the rear mold 103 as an insert; (3) the rotating disk of the two-color injection molding machine rotates, and the rear mold 103 rotates To the molding position for the second time; (4) rear mold 103 and wheel body front mold 102 injection moulding...