Forming mould for SD (secure digital) card

Abstract

The invention discloses a forming mould for an SD (secure digital) card, comprising pouring units, wherein each pouring unit comprises cavities, a pouring gate, and branch pouring channels corresponding to the cavities one by one, wherein one end of each of the branch pouring channels is converged and then communicated with the pouring gate, and the other end radially extends outwards by taking the pouring gate as a centre; and the cavities are communicated with the end extending outwards, of each of the branch pouring channels. The forming mould for an SD card provided by the invention is divided by the pouring units, and the structure of the branch pouring channels and the cavities is formed by that the branch pouring channels and the cavities are radially arrayed by taking the pouring gate as a centre, so that the flow speeds and the flow rates of molten materials entering the branch pouring channels and the cavities from the pouring gate are kept to be in conformity, thus ensuring the quality of products, and being capable of reducing the degree of the influence on production due to partial faults simultaneously.

Description

technical field [0001] The invention relates to an SD card production device, in particular to an SD card molding die. Background technique [0002] Most of the existing SD card forming molds have a multi-outlet structure, that is, multiple products can be obtained by molding at one time. In order to improve production efficiency, it is generally a structure of sixteen or thirty-two out of one, and the cavity of the product is arranged in two straight lines. . by figure 1 The example of a 16-out SD card forming mold is shown as an example, including 16 cavities 1, sprue 2, main runner 3 and sub-runner 4, and molten material flows from sprue 2 into main sprue 3 In the cavity, the flow is divided into each type 1 through the runner 4. In order to ensure that all the cavities 1 can be filled as synchronously as possible, two sprues 2 are designed (if the structure is 32, more sprues need to be designed) Mouth 2). The design of this structure requires sixteen cavities 1, two...

AI Technical Summary

Problems solved by technology

The design of this structure requires sixteen cavities 1, two sprues 2, main runner 3 and runner 4 to work normally without failure. If one of them fails, it will cause melting. The flow of material to each cavity 1 is not uniform, which affects the molding quality of the product, and production must be stopped for repair; at the same time, the feeding flow rate and flow rate of the two sprues 2 must be consistent; it is technically difficult to maintain the consistency of several corresponding cavities It is relatively high, and at the same time, in order to ensure the consistency of the feed, other monitoring equipment has to be added, which further increases the production cost

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