Glue pouring structure for PP dialyzer production
Through the rubber filling ring structure designed with threaded connection and guide inclined surface, the problem of the rubber filling ring not being closely matched with the shell in the production of PP dialyzer is solved, and the high-quality welding and non-overflow effect of the dialyzer is achieved.
Patent Information
- Application Number
- CN202422403183.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In the production of existing PP dialysers, the clamping accuracy of the rubber filling ring and the shell is poor, resulting in welding failure and glue spilling, affecting the quality of the dialyser.
The screw-connected rubber-filled ring structure is adopted, combined with the guide bevel and the shell surface design, to ensure that the rubber-filled ring is closely matched with the shell, avoiding glue spills, and the dialyzer end cap and shell are connected through ultrasonic welding.
The tight coordination between the rubber filling ring and the shell is achieved to prevent the polyurethane glue from overflowing, ensure successful welding, avoid the glue spilling problem of the dialyzer, and improve the production quality.
Smart Images
Figure CN223236773U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of blood purification, and in particular relates to a glue-filling structure used for the production of PP dialyzers. Background Art
[0002] Currently, the dialyzer end caps and shells on the market are made of PC material. PC has the characteristics of good dimensional stability, high mechanical strength, and good temperature resistance. The end caps and shells are connected by threads. However, PP material is much inferior to PC in terms of dimensional stability, mechanical strength, and temperature resistance. Therefore, ultrasonic welding is used to connect the PP shell and end caps.
[0003] The traditional rubber ring and the shell adopt a snap-fit method. The snap-fit method is mainly used in the production of PC dialyzers. Because the PC shell and PC end cover are connected by threads, the requirements for the fit between the rubber ring and the shell are not high, so it adopts a snap-fit method. The production process of PP dialyzers is different from that of PC. Its end cover and shell are welded together by ultrasonic welding, which requires that there are no other substances on the welding surface. The snap-fit accuracy is poor, and glue overflow is likely to occur on the end face of the shell, causing welding failure of the end cover and shell. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a glue-filling structure for the production of PP dialyzers, which ensures that the glue-filling ring and the shell are closely matched.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a glue filling structure for the production of PP dialyzers, comprising an outer shell and a glue filling ring body, a glue filling port is provided at one end of the glue filling ring body, the inner ring diameter of the glue filling port is smaller than the inner ring diameter of the glue filling ring body, the glue filling ring body is threadedly connected to the end of the outer shell, and a shell compression surface is formed at the axial shoulder where the glue filling ring body is connected to the glue filling port, and the shell compression surface is pressed against the end face of the end of the outer shell.
[0006] Preferably, the inner side of the shell pressing surface is tilted toward the glue filling port to form a guiding slope, and the tilt angle is 1° to 3°.
[0007] Preferably, the inclination angle of the guide slope is 2°.
[0008] Preferably, a thrust groove is provided at the other end of the rubber filling ring body.
[0009] Preferably, a plurality of tightening grooves are evenly arranged on the outer wall of the main body of the rubber filling ring.
[0010] Preferably, the glue filling ring body and the glue filling port adopt an integrally formed structure.
[0011] Preferably, the main body and the filling port of the glue ring are made of PE material.
[0012] Compared with the existing technology, the above technical solution has the following beneficial effects:
[0013] 1. The thread of the rubber ring and the thread of the shell cooperate smoothly and well, which changes the traditional way of forming a closed space by cooperating the rubber ring buckle and the shell, avoiding adverse conditions such as dialyzer glue overflow caused by poor cooperation. After tightening, the shell pressure surface of the rubber ring can be pressed tightly against the end face of the shell, preventing the polyurethane glue from overflowing and sticking to the end face of the shell during the glue injection process. The end face of the shell remains in a glue-free state, which is conducive to the welding of the shell and the end cover; the glue filling port gathers the membrane wire into a certain diameter range to avoid the deviation of the membrane wire.
[0014] 2. A guide slope is formed on the inner side of the pressure shell surface toward the glue injection port, which is beneficial for the flow and filling of the polyurethane glue in the glue injection ring and for the polyurethane glue to fill the gaps between the membrane threads. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the present utility model.
[0016] Figure 2 It is a cross-sectional view of the rubber filling ring of the present invention.
[0017] Figure 3 It is a top view of the rubber filling ring of the utility model.
[0018] Among them: 1, tightening groove 2, convergence hole 3, guide slope 4, shell pressure surface 5, internal thread 6, thrust groove 7, glue filling port 8, glue filling ring body 9, shell 10, dialyzer interface 11, sealant 12, guide ring. DETAILED DESCRIPTION
[0019] Figures 1-3 This is the best embodiment of the present invention, Figures 1-3 The utility model is further described.
[0020] like Figures 1 and 2 As shown, the utility model is a glue filling structure for PP dialyzer production, including an outer shell 9 and a glue filling ring body 8, a glue filling port 7 is provided at one end of the glue filling ring body 8, a focusing hole 2 is provided in the middle of the glue filling port 7, the inner ring diameter of the glue filling port 7 is smaller than the inner ring diameter of the glue filling ring body 8, the focusing hole 2 focuses the membrane filaments within a certain diameter range to prevent the membrane filaments from deviating, an internal thread 5 is provided on the inner ring of the glue filling ring body 8, an external thread is provided on the outer wall of the end of the outer shell 9, the glue filling ring body 8 is threadedly connected to the end of the outer shell 9, the glue filling ring body 8 is threadedly connected to the dialyzer outer shell 9, a shell pressure surface 4 is formed at the shoulder where the glue filling ring body 8 is connected to the glue filling port 7, the glue filling ring body 8 is screwed onto the dialyzer outer shell 9, and the shell pressure surface 4 is pressed against the end face of the end of the outer shell 9 to prevent the polyurethane glue from overflowing and sticking to the end face of the outer shell 9 during the glue injection process, thereby affecting the ultrasonic welding of the outer shell and the end cover.
[0021] The inner side of the pressure shell surface 4 is inclined toward the glue filling port 7, and a guide slope 3 is formed at the inclined position. The inclination angle of the guide slope 3 is 1°~3°. In this embodiment, the inclination angle of the guide slope 3 is 2°. The setting of the guide slope 3 is conducive to the flow and filling of the polyurethane glue in the glue filling ring, so that the polyurethane glue can be better filled into the gaps between the membrane wires.
[0022] The main body 8 of the rubber filling ring and the glue filling port 7 adopt an integrally formed structure, and both the main body 8 of the rubber filling ring and the glue filling port 7 are made of PE material. A thrust groove 6 is provided at the other end of the main body 8 of the rubber filling ring. The cross-section of the thrust groove 6 is trapezoidal and the upper end of the trapezoid is provided with a rounded corner. After the injection molding of the rubber filling ring is completed, the rubber filling ring is separated from the mold through the thrust groove 6 under the action of the ejection mechanism.
[0023] like Figure 3 As shown, a number of tightening grooves 1 are evenly arranged on the outer wall of the rubber ring body 8. The tooling is clamped into the tightening grooves 1 and then rotated to achieve threaded connection between the rubber ring and the dialyzer housing 9.
[0024] A dialyzer interface 10 is also provided on the outer wall of the shell 9. The shell 9 is hollow. A guide ring 12 is fixedly provided on the inner wall of the end of the shell 9. A plurality of protrusions are provided on the side of the guide ring 12 close to the glue ring body 8. A plurality of bifurcated portions are also provided on the protrusions. When pouring glue, the sealant 11 is poured in from the glue filling port 7, and the protrusions on the guide ring 12 are inserted into the sealant 11, making the sealant 11 more firm.
[0025] During the production process of PP dialyzers, ultrasonic welding technology is used to connect the dialyzer shell 9 to the end cover, and it is required that there is no polyurethane glue on the welding surface. Due to the material characteristics of PP and the snap fit, it is impossible to ensure that the polyurethane glue leaks to the welding surface during the sealing process. The glue ring of the utility model is connected to the dialyzer shell 9 by a threaded connection, and a shell pressure surface 4 is formed at the shoulder where the glue ring body 8 and the glue filling port 7 are connected. The threaded connection ensures that the glue ring and the shell 9 are tightly fitted, avoiding the influence of the shell 9 size fluctuation caused by excessive PP shrinkage on the fit. At the same time, the shell pressure surface 4 is pressed tightly on the end of the dialyzer shell 9 to ensure that the shell 9 and the glue ring are tightly fitted and seamless, preventing the polyurethane glue from overflowing and sticking to the end face of the shell 9 during the glue injection process; a guide slope 3 is provided on the inner side of the glue ring, which is conducive to the polyurethane glue filling into the membrane wire gap; the convergence hole 2 on the top has a good membrane wire convergence effect, and the product will not deviate or leak.
[0026] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any other manner. Any person skilled in the art may utilize the above disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.
Claims
1. A glue-filling structure for PP dialyzer production, characterized by: The invention comprises an outer shell (9) and a glue filling ring body (8), wherein a glue filling port (7) is provided at one end of the glue filling ring body (8), the inner ring diameter of the glue filling port (7) is smaller than the inner ring diameter of the glue filling ring body (8), the glue filling ring body (8) is threadedly connected to the end of the outer shell (9), and a shell pressing surface (4) is formed at the shaft shoulder where the glue filling ring body (8) and the glue filling port (7) are connected, and the shell pressing surface (4) is pressed against the end face of the end of the outer shell (9).
2. The glue-filling structure for PP dialyzer production according to claim 1, characterized in that: The inner side of the shell pressing surface (4) is inclined toward the glue filling port (7) to form a guide inclined surface (3), and the angle of inclination is 1° to 3°.
3. The glue-filling structure for PP dialyzer production according to claim 2, characterized in that: The guide slope (3) has an inclination angle of 2°.
4. The glue-filling structure for PP dialyzer production according to claim 1, characterized in that: A thrust groove (6) is provided at the other end of the rubber ring body (8).
5. The glue-filling structure for PP dialyzer production according to claim 1, characterized in that: A plurality of tightening grooves (1) are evenly arranged on the outer wall of the rubber filling ring body (8).
6. The glue-filling structure for PP dialyzer production according to claim 1, characterized in that: The glue filling ring body (8) and the glue filling port (7) adopt an integrally formed structure.
7. The glue-filling structure for PP dialyzer production according to claim 1, characterized in that: The glue filling ring body (8) and the glue filling port (7) are made of PE material.