Exhaust flange plate
By designing an exhaust flange and utilizing the combination of a flow divider and an exhaust valve needle, the problem of gas not being able to escape from the melt was solved, improving product quality and simplifying the equipment structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GILLKON SCREW MFG SHANGHAI CO LTD
- Filing Date
- 2026-03-27
- Publication Date
- 2026-05-12
AI Technical Summary
The flanges of existing extrusion equipment lack a dedicated venting structure, which prevents gas from being discharged from the melt in a timely manner, resulting in bubbles, silver streaks, and surface defects in the products, thus affecting product quality.
Design an exhaust flange equipped with a sub-nozzle, a flow divider, an exhaust valve needle, and a drive assembly. Through the cooperation of the material conveying channel and the exhaust port, gas-liquid separation is achieved, and the gas in the molten material is discharged.
It achieves drying and density enhancement of molten materials, improves product quality, has a simplified structure, is easy to maintain, and has a short processing cycle.
Smart Images
Figure CN122008522A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of injection molding equipment technology, and specifically to an exhaust flange. Background Technology
[0002] In extrusion molding equipment, especially in the fields of plastic extruders, rubber extruders, and related polymer material processing, materials often release gases such as water vapor, residual monomers, and low-molecular-weight volatiles during the heating and pressurization melting process. If these gases are not discharged in time, they can cause problems such as bubbles, silver streaks, and surface defects in the products, or even trigger hydrolysis reactions leading to material degradation, severely affecting the mechanical properties and appearance quality of the products. Therefore, venting performance is one of the key indicators for evaluating the advancement of extrusion equipment.
[0003] The connecting flange is an important component of the screw head assembly, generally used to connect the nozzle and other structures. However, conventional flanges have a closed flow channel design and lack a dedicated venting structure, making it impossible to "degas" the melt about to enter the molding die. This results in defects such as porosity or yellowing in some products.
[0004] Therefore, there is a need in this field for an exhaust flange with good exhaust drying function. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an exhaust flange.
[0006] To achieve the objectives of this invention, the following technical solutions are provided in this application.
[0007] In a first aspect, this application provides an exhaust flange with a sub-nozzle coaxially mounted at its front end. A through-feed channel is provided at the axial center of the flange and the sub-nozzle. The exhaust flange includes an exhaust plate body, a diverter shuttle disposed in the feed channel of the exhaust plate body, and at least one exhaust plate unit uniformly disposed around the outer periphery of the exhaust plate. Each exhaust plate unit includes an exhaust valve needle and a drive assembly for resetting the exhaust valve needle. An exhaust hole is provided on the side wall of the exhaust plate body. The inner side of the exhaust valve needle is inserted into the exhaust hole, and the inner end face of the exhaust valve needle reciprocates between the outer wall of the diverter shuttle and the inner wall of the feed channel. The diameter of the inner side of the exhaust valve needle is 2-15 μm smaller than the diameter of the exhaust hole. When the molten material travels through the feed channel to the exhaust plate unit position, gas is discharged from the gap between the exhaust valve needle and the exhaust hole, while the molten material cannot be discharged through these gaps, thereby achieving gas-liquid separation, drying and density improvement of the material, and improving product quality.
[0008] In one embodiment of the first aspect, the diverting shuttle comprises, from back to front, a diverting section, a shuttle body, a support section, and a converging section. The diverting section is a rearward-facing conical shape. The outer diameter of the shuttle body is uniform and smaller than the inner diameter of the material conveying channel in the exhaust disk body. The outer diameter of the support section is the same as the inner diameter of the material conveying channel in the exhaust disk body. The support section and the converging section are provided with axially distributed and interconnected fluid channels. The converging section is conical. The diverting section is designed to break up the molten material, allowing it to flow evenly between the inner wall of the material conveying channel and the diverting shuttle, thus thinning the molten material and making it easier for gas to escape from the molten material, facilitating gas-liquid separation. The support section is designed to ensure that the entire diverting shuttle can be stably placed within the material conveying channel.
[0009] In one embodiment of the first aspect, the exhaust valve needle includes a first needle body, a second needle body, a third needle body, and a fourth needle body from the inner end to the outer end, wherein the first needle body is inserted into the exhaust hole, and the diameter of the first needle body is 2~15μm smaller than the diameter of the exhaust hole, the diameter of the second needle body is larger than the diameter of the exhaust hole, and the diameter of the third needle body is larger than the diameter of the fourth needle body.
[0010] In one embodiment of the first aspect, the drive assembly includes a limiting nut and a spring, wherein the limiting nut is T-shaped and includes a nut and a stud, wherein the stud is mounted on the side wall of the exhaust disc body; a through hole is provided at the axis of the limiting nut, the through hole including at least a first hole and a second hole from the inner end to the outer end, wherein the fourth needle is inserted into the second hole, and the diameter of the third needle is greater than the inner diameter of the second hole and the diameter of the fourth needle; the spring is placed in the first hole, and the outer end of the spring abuts against the inner wall of the outer end of the first hole, and the inner end of the spring abuts against the outer end face of the second needle.
[0011] In one embodiment of the first aspect, when the inner end face of the first needle body is flush with the inner end face of the vent hole, the outer end face of the third needle body just abuts against the inner wall of the outer end of the first hole. This arrangement is to prevent molten material from entering the vent hole.
[0012] In one embodiment of the first aspect, the number of exhaust disc units is 1 to 100, and they can be arranged in single groups, double groups, or multiple groups.
[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The structure is more streamlined; 2. The exhaust is more reasonable; 3. Maintenance and repair are particularly convenient; 4. Parts are easier to process and the production cycle is faster. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the exhaust flange.
[0015] Figure 2 This is a schematic diagram of the sub-injector nozzle.
[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the exhaust disc body.
[0017] Figure 4 for Figure 3 A schematic diagram of the structure of AA.
[0018] Figure 5 This is a schematic diagram of the flow divider shuttle.
[0019] Figure 6 This is a side view of the diversion shuttle structure.
[0020] Figure 7 This is a schematic diagram of the exhaust valve needle.
[0021] Figure 8 This is a schematic diagram of the limit nut.
[0022] In the attached diagram, 1 is the exhaust disc body, 2 is the sub-nozzle, 3 is the flow divider shuttle, 4 is the exhaust valve needle, 5 is the spring, 6 is the limit nut, 7 is the first material conveying channel, 8 is the first external thread, 9 is the first internal thread, 10 is the second material conveying channel, 11 is the exhaust hole, 12 is the mounting hole, 13 is the second internal thread, 14 is the flow divider section, 15 is the shuttle body, 16 is the support section, 17 is the flow convergence section, 18 is the fluid tank, 19 is the first needle body, 20 is the second needle body, 21 is the third needle body, 22 is the fourth needle body, 23 is the nut, 24 is the stud, 25 is the first hole, 26 is the second hole, 27 is the second external thread, and 28 is the heating coil. Detailed Implementation
[0023] Unless otherwise defined, the technical or scientific terms used in this specification and claims shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. All values listed herein, ranging from the minimum to the maximum, refer to all values obtained by incrementing the minimum and maximum values by one unit when the difference between the minimum and maximum values is more than two units.
[0024] The following describes specific embodiments of the present invention. It should be noted that, in order to provide a concise description, this specification cannot provide a detailed description of all features of the actual embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art can modify and substitute the embodiments of the present invention, and the resulting embodiments are also within the protection scope of the present invention. Example
[0025] The embodiments of the present invention will be described in detail below. These embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. However, the scope of protection of the present invention is not limited to the following embodiments. Example 1
[0026] An exhaust flange, the structure of which is as follows: Figure 1 As shown, the device includes an exhaust disc body 1, with a sub-injector 2 coaxially mounted on the front end of the exhaust disc body 1. Six exhaust disc units are evenly arranged on the side wall of the exhaust disc body 1. Each exhaust disc unit includes an exhaust valve needle 4, a spring 5, and a limit nut 6. Details are as follows.
[0027] The structure of the sub-jet nozzle 2 is as follows Figure 2 As shown, the sub-nozzle 2 has a first material conveying channel 7 that runs through the front and rear at its axis, and the rear end side wall of the sub-nozzle 2 has a first external thread 8.
[0028] The structure of the exhaust disc body 1 is as follows Figure 3 , Figure 4 As shown, a second conveying channel 10, which runs through the front and rear, is provided at the axis of the exhaust plate, and a first internal thread 9 is provided at the axis of the front end of the exhaust plate. The sub-nozzle 2 is connected to the exhaust plate body 1 through a first external thread 8 and a first internal thread 9. After installation, the first conveying channel 7 and the second conveying channel 10 are connected. Six holes are provided on the middle side wall of the exhaust plate body 1. Each hole includes an exhaust hole 11 and a mounting hole 12. The exhaust hole 11 is located on the inner side, and the mounting hole 12 is located on the outer side. The inner diameter of the mounting hole 12 is larger than the inner diameter of the exhaust hole 11. A second internal thread 13 is provided on the inner wall of the mounting hole 12. A heating coil 28 is installed on the outside of the exhaust plate body 1.
[0029] A diversion shuttle 3 is installed in the second material conveying channel 10. The structure of the diversion shuttle 3 is as follows: Figure 5 , Figure 6 As shown, from back to front, it includes a flow-diverting section 14, a shuttle body 15, a support section 16, and a flow-gathering section 17. The flow-diverting section 14 is a conical shape that is set backward. The outer diameter of the shuttle body 15 is uniform and smaller than the inner diameter of the second material conveying channel 10. The outer diameter of the support section 16 is the same as the inner diameter of the second material conveying channel 10. The support section 16 and the flow-gathering section 17 are provided with fluid channels 18 that are distributed along the axial direction and run through the front and back. The flow-gathering section 17 is conical.
[0030] The structure of the exhaust valve needle 4 is as follows Figure 7As shown, from the inner end to the outer end, the device includes a first needle body 19, a second needle body 20, a third needle body 21, and a fourth needle body 22. The first needle body 19 is inserted into the vent hole 11, and the diameter of the first needle body 19 is 2~15μm smaller than the diameter of the vent hole 11. The diameter of the second needle body 20 is larger than the diameter of the vent hole 11 but smaller than the diameter of the mounting hole 12. The diameter of the third needle body 21 is larger than the diameter of the fourth needle body 22.
[0031] The structure of the limiting nut 6 is as follows Figure 8 As shown, the limiting nut 6 includes an integrally formed nut 23 and stud 24. The outer wall of the stud 24 is provided with a second external thread 27, which matches the second internal thread 13. Therefore, the limiting nut 6 is installed in the mounting hole 12. The limiting nut 6 has a through hole at its axis, which includes at least a first hole 25 and a second hole 26 from the inner end to the outer end. The fourth needle body 22 passes through the second hole 26, and the diameter of the third needle body 21 is greater than the inner diameter of the second hole 26, which is greater than the diameter of the fourth needle body 22. The spring 5 is placed in the first hole 25, and the outer end of the spring 5 abuts against the inner wall of the outer end of the first hole 25. The inner end of the spring 5 abuts against the outer end face of the second needle body 20. When the molten material does not move forward, the inner end of the first needle body 19 abuts against the outer wall of the shuttle body 15. At this time, the inner end face of the second needle body 20 abuts against the inner end face of the mounting hole 12. As the material moves forward, it pushes the first needle body 19 outward, causing the entire exhaust valve needle 4 to move outward, at which point the spring 5 is compressed. When the inner end face of the first needle body 19 is flush with the inner end face of the exhaust hole 11, the outer end face of the third needle body 21 just abuts against the inner wall of the outer end of the first hole 25. When the material stops moving, the spring 5 pushes the second needle body 20 inward, causing the entire exhaust valve needle 4 to move inward.
[0032] The working principle of this exhaust flange is as follows: When the molten material enters the second conveying channel 10, it is diverted by the diversion section 14 and enters the space between the second conveying channel 10 and the shuttle body 15. When the material passes the vent hole 11, the gas will be discharged from the gap between the vent valve needle 4 and the vent hole 11, while the molten material cannot be discharged through these gaps, thus achieving gas-liquid separation, drying the material, and improving product quality. The dried material continues to move forward, passes through the fluid tank 18, and under the guidance of the converging section 17, finally converges in the first conveying channel 7 and is finally ejected from the front end of the sub-nozzle 2.
[0033] The above description of the embodiments is intended to enable those skilled in the art to understand and apply this application. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, this application is not limited to the embodiments described herein, and any improvements and modifications made by those skilled in the art based on the disclosure of this application without departing from the scope and spirit of this application are within the scope of this application.
Claims
1. An exhaust flange, wherein a sub-injector nozzle is coaxially mounted on the front end of the flange, and a conveying channel running through the front and rear of the flange and the sub-injector nozzle is provided at their axial centers, characterized in that, The exhaust flange includes an exhaust flange body, a diverter shuttle disposed in the material conveying channel of the exhaust flange body, and at least one exhaust flange unit evenly disposed on the outer periphery of the exhaust flange. Each exhaust flange unit includes an exhaust valve needle and a drive assembly for driving the exhaust valve needle to reset. The side wall of the exhaust flange body is provided with an exhaust hole. The inner side of the exhaust valve needle is inserted into the exhaust hole, and the inner end face of the exhaust valve needle valve reciprocates between the outer wall of the diverter shuttle and the inner wall of the material conveying channel. The inner diameter of the exhaust valve needle valve is 2~15μm smaller than the diameter of the exhaust hole.
2. The exhaust flange as described in claim 1, characterized in that, The diverting shuttle, from back to front, includes a diverting section, a shuttle body, a support section, and a converging section. The diverting section is a conical shape facing backward. The outer diameter of the shuttle body is uniform and smaller than the inner diameter of the material conveying channel in the exhaust disk body. The outer diameter of the support section is the same as the inner diameter of the material conveying channel in the exhaust disk body. The support section and the converging section are provided with fluid grooves that are distributed axially and run through the front and back. The converging section is conical.
3. The exhaust flange as described in claim 1, characterized in that, The exhaust valve needle comprises a first needle body, a second needle body, a third needle body, and a fourth needle body from the inner end to the outer end. The first needle body is inserted into the exhaust hole, and the diameter of the first needle body is 2-15 μm smaller than the diameter of the exhaust hole. The diameter of the second needle body is larger than the diameter of the exhaust hole, and the diameter of the third needle body is larger than the diameter of the fourth needle body.
4. The exhaust flange as described in claim 3, characterized in that, The drive assembly includes a limiting nut and a spring. The limiting nut is T-shaped and includes a nut and a stud, wherein the stud is mounted on the side wall of the exhaust disc body. A through hole is provided at the axis of the limiting nut. The through hole includes at least a first hole and a second hole from the inner end to the outer end. The fourth needle is inserted into the second hole, and the diameter of the third needle is greater than the inner diameter of the second hole, which is greater than the diameter of the fourth needle. The spring is placed in the first hole, and the outer end of the spring abuts against the inner wall of the outer end of the first hole, while the inner end of the spring abuts against the outer end face of the second needle.
5. The exhaust flange as described in claim 4, characterized in that, When the inner end face of the first needle body is flush with the inner end face of the vent hole, the outer end face of the third needle body just abuts against the inner wall of the outer end of the first hole.
6. The exhaust flange as described in any one of claims 1 to 5, characterized in that, The number of exhaust disc units is 1 to 100.