Injection mold and injection molding process of thin-walled backlight box for medical imaging X-ray film
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A technology of medical imaging and injection molding, which is applied in the injection molding process of thin-walled injection molding, and in the field of injection molds for thin-walled backlight boxes of medical imaging X-ray films. It can solve the problems of increasing operating costs of enterprises, affecting the quality of finished products, and large internal stress of products , achieve the effect of shortening the injection molding cycle, reducing operating costs, and shortening the process cycle
Active Publication Date: 2017-10-31
INPLAST PLASTIC & ELECTRONICS SUZHOU CO LTD
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Problems solved by technology
The backlight box is a large number of consumables. In order to save costs, the design process will consider reducing the wall thickness of the product as much as possible to save raw materials. This puts forward higher requirements for the molding process, such as overcoming the rapid injection molding process of thin-walled parts. Heating, rapid cooling, exhaust problems, etc. If these problems are not solved, the quality of the finished product will be seriously affected, such as large internal stress of the product, poor flatness caused by product warping, etc., which can only be achieved under the premise of the existing technology Replacing the existing ordinary injection molding machine with a high-speed injection molding machine will greatly increase the operating cost of the enterprise
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Embodiment 1
[0028] S1, raw material drying, drying the raw material in an oven with a drying temperature of 80-90°C for 2-4 hours;
[0029] S2, plastisol, feed the dried raw material into the injection molding machine, and heat it to the plasticizing temperature of 230°C~255°C within 4~5s, and set the operating parameters of the injection molding machine as the first stage sol The speed is 75%, the sol speed of the second stage is 60%, the sol speed of the third stage is 42%, the sol pressure of the three stages is 120 Kg / cm 3 ;
[0030] S3. Injection, the plasticized liquid flow is injected from the injection port of the mold into the cavity through the nozzle of the injection molding machine, and is injected from the first injection port 1 and the second injection port at the same time The injection port 2, the third injection port 3, the fourth injection port 4, and the fifth injection port 5 are injected into the cavity for 1.6~2s, and after an interval of 0.5s, at the same injection...
Embodiment 2
[0040] The difference with embodiment 1 is only that the glue injection process is different:
[0041] S3. Injecting glue, the plasticized liquid flow is injected from the injection port of the mold into the cavity through the nozzle of the injection molding machine, and the glue is injected from the first injection port at 0.8~1.2 under the following injection pressure and injection speed. s, after an interval of 0.1s, inject glue from the second injection port for 0.8~1.2s, after an interval of 0.1s, inject glue from the third injection port for 0.8~1.2s, after an interval of 0.1s, inject glue from the fourth injection port for 0.8~ 1.2s, after an interval of 0.1s, inject glue from the fifth injection port for 0.8~1.2s, after an interval of 0.1s, inject glue from the sixth injection port 6 into the cavity for 1.6~2s.
[0042] Among them, there are four stages of injection pressure and injection speed, the first stage injection pressure is 130~140Kg / cm 3 , the injection spee...
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Abstract
The present invention provides an injection molding mold of a medical imaging X-ray film thin wall backlight box. The injection molding mold comprises a front mold and a rear mold, wherein a molding cavity of the backlight box is formed inside the front mold, the rear mold and the internal on the rear of the rear mold, a molding core is arranged inside the molding cavity, and the injection molding mold is characterized in that the molding cavity and the molding core are made from beryllium copper. According to the present invention, the molding cavity made from the beryllium copper and the molding core made from the beryllium copper are selected, such that the heat transfer and heat elimination effect is good, the mold temperature can be rapidly increased during the injection molding so as to ensure the fluidity of the plastic, and the mold can be rapidly cooled after the injection molding so as to rapidly cure and shorten the injection molding period. The present invention further provides an injection molding process of the injection molding mold, wherein the injection molding process comprises: pre-treating raw materials, carrying out plasticizing glue melting, injecting the glue, carrying out cooling molding, ejecting out and demolding, grasping the semi-finished product to a work table through a mechanical arm, and carrying out electrostatic removing and dust removing to obtain the product. According to the present invention, the glue injecting sequence and the glue injecting amount of the glue injecting port are precisely controlled, such that the rapid smooth gas discharge can be controlled, the internal stress of the product can be reduced, the molding efficiency is high under the premise of the assurance of the product quality, the process cycle is short, and the operating cost of the enterprise is substantially reduced.
Description
technical field [0001] The invention relates to an injection mold for a medical image X-ray film thin-walled backlight box and its injection molding process, in particular to an injection mold for a medical image X-ray film thin-walled backlight box with a fast heating and cooling speed and the thin-walled backlight box for a medical image X-ray film using the injection mold. Injection molding process for wall injection molding. Background technique [0002] X-ray fluoroscopy has been used as a routine method in the medical industry for a long time, but the related equipment accessories have been updated all the time. The X-ray film backlight box is used to store X-ray films in medical imaging machines. The backlight box products are diverse and lightweight. Quality, manufacturing cost, and convenience of use are all its development directions in domestic and foreign markets. The X-ray film is a large-sized planar structure, which requires a good flatness of the backlight b...
Claims
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Application Information
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