Method and device for sealing end faces of film bundle

Abstract

The invention discloses a method and device for sealing the end faces of a film bundle. The device for sealing the end faces of the film bundle comprises a base plate, a working part arranged on the base plate, a base and a hot plate, wherein the base and the hot plate are located on the two sides of the working part respectively. A through hole is formed in a working plate of the working part, a plurality of suction holes are formed in the edge of the circumference of the through hole and connected with an air pipe, two positioning holes are formed in the top of the base, a rail groove is formed in the bottom of the base and matched with a guide rail of the base plate, the hot plate is fixed through a hot plate base, and a driving mechanism is connected to the hot plate base. The method for sealing the end faces of the film bundle includes the step that the end faces of the hollow fiber film bundle are sealed in the mode that aluminum foil sheets are arranged on the end faces of a glue injecting cover in a hot-seal mode. Secondary glue injecting is avoided, production working procedures are reduced, the production and manufacturing cost is effectively reduced, and the complete film silk sealing effect can be played.

Description

technical field [0001] The invention relates to a membrane bundle end face sealing method and a sealing device, belonging to the technical field of hemodialyzer manufacture. Background technique [0002] The hemodialyzer mainly uses the principle of semi-permeable membrane to introduce the patient's blood and dialysate into the hemodialyzer at the same time. The two flow in opposite directions on both sides of the dialysis membrane. Pressure gradient to achieve the purpose of removing toxins and excessive water retention in the body, replenishing the substances needed in the body, and maintaining electrolyte and acid-base balance. [0003] During the manufacturing process of the hemodialyzer, it is necessary to bundle the hollow fiber membranes into bundles, cut them flat and put them into the main casing, and then sinter the end faces of the membrane bundles to realize the sealing of the blood channel on the end faces of the membrane bundles. In the prior art, laser sinter...

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Problems solved by technology

[0004] Laser sintering method: it uses laser light to directly irradiate the end face of the membrane bundle, and sinters the membrane filaments on the laser path through its high temperature melting. This method is affected by the laser energy, and the penetration is limited, so it cannot guarantee the complete sealing of the end face of the membrane bundle. The energy consumption of sintering is high, and the maintenance cost of laser components is also high;

[0005] Electrothermal infrared sintering method: it uses the infrared thermal effect generated by the hot plate to sinter the end face of the film bundle. During the sintering process, the hot plate is kept out of contact with the product to prevent the film filament from sticking to the hot plate after melting. However, the hot plate cannot contact the film bundle. The contact is offset, so the sintered surface is not smooth, and the complete sealing of the end surface of the membrane bundle cannot be guaranteed;

[0006] Two-time glue injection method: After putting the film bundle into the main shell, use a fully sealed rubber cover to seal both ends of the main shell. When the first glue is injected, the amount of glue injected is small to ensure that all membrane threads The ports are all sealed. When the head glue injected for the first time is cured for a certain period of time, the second glue injection is performed to achieve a good glue injection effect; in this method, the amount of head glue is large during the glue injection process, and the production The manufacturing cost is also relatively high, and because it takes a certain amount of curing time after the first injection of glue to perform the second injection of glue, the production takes a long time and the efficiency is not high;

[0007] To sum up the above three methods, it is necessary to use a rubber cover that can completely seal the end of the main shell, and the rubber cover must ensure that the head glue will not leak during the subsequent centrifugal injection. This requirement leads to the production of the rubber cover. The cost increases; and the existing rubber cover is generally divided into a cover (for sealing, which is equivalent to the top of the cover) and a main body (connected with the shell, without a bottom). The assembly, the operation process is cumbersome, and the production capacity is low

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