Easily removable counter-flange

Abstract

The utility model relates to an easy-to-disassemble reverse top flange, including flange plate, flange nut and reverse top bolt, wherein the flange nut front and rear two ends are through, and the inner passage of flange nut includes first cavity, second cavity and third cavity from front to back in proper order, the front end of third cavity is connected with material pipe, the inner wall of first cavity protrudes a plurality of clamping stages to the axial center, and the distance from the groove wall of installation groove to the axial center is greater than or equal to the radius of second cavity, the flange plate includes installation end and clamping end, and a plurality of protrusions are equipped along the axial direction of clamping end, the adjacent two protrusions are clamping groove, the shape and size of clamping groove and clamping stage are matched, the shape and size of protrusion and installation groove are matched, and the axial length of clamping end is same with the axial length of second cavity, the through screw hole is equipped on clamping stage, the reverse top bolt is installed in the screw hole, and the axial center of flange plate is through from front to back. The reverse top flange of the utility model is simple in structure and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to an easy-to-disassemble reverse flange. Background Technology

[0002] The screw assembly is a crucial component of injection molding equipment, and the flange is an integral part of the screw assembly, primarily used to connect the nozzle and the feed tube. Existing flanges consist of a flange plate and several bolts and nuts. During installation, the flange plate is aligned, the bolts are passed through the holes in the flange plate, and then the nuts are tightened. Due to the large number of bolts, each installation and disassembly requires a significant amount of time.

[0003] Therefore, there is a need in this field for a flange that is easier to disassemble and assemble. Summary of the Invention

[0004] The purpose of this utility model is to overcome the defects of the existing technology and provide an easy-to-disassemble reverse flange.

[0005] To achieve the purpose of this utility model, this application provides the following technical solution.

[0006] In a first aspect, this application provides an easily detachable top flange for connecting a feed pipe and a nozzle. The top flange includes a flange plate, a flange nut, and a top bolt. The flange nut has a through-hole design at both ends, and its internal channel, from front to back, includes a first cavity, a second cavity, and a third cavity. The third cavity is connected to the front end of the feed pipe. The inner wall of the first cavity extends towards the axial center with multiple snap-fit ​​platforms, and a mounting groove is provided between two adjacent snap-fit ​​platforms. The radius of the second cavity is greater than or equal to the radius of the mounting groove. The distance from the groove wall to the shaft center; the flange includes an installation end and a snap-fit ​​end. The snap-fit ​​end has multiple protrusions along its axial direction, and a snap-fit ​​groove is formed between two adjacent protrusions. The shape and size of the snap-fit ​​groove matches the snap-fit ​​platform, and the shape and size of the protrusions match the installation groove. The axial length of the snap-fit ​​end is the same as the axial length of the second cavity. The snap-fit ​​platform has a through screw hole, and the anti-top bolt is installed in the screw hole. The shaft center of the flange is through from front to back, and the tail end of the nozzle is installed at the front shaft center of the flange. Compared with existing flanges, the easy-to-disassemble anti-top flange of this application only requires connecting the nozzle to the flange first, connecting the flange nut to the material pipe, and then inserting the flange into the flange nut so that the snap-fit ​​end enters the second cavity. Then, rotate it at a certain angle so that the protrusion moves to the bottom of the snap-fit ​​platform. Then, tighten the anti-top bolt downwards to abut the front end of the protrusion, generating a certain pressure and friction, thereby preventing the flange from rotating and completing the stable installation of the entire structure, which is very quick. During disassembly, simply rotate the top bolt slightly to separate it from the protrusion. This allows the flange to rotate. Once the protrusion aligns with the mounting groove, the flange can be pulled out of the flange nut, completing the disassembly. Installation and disassembly are much faster than with existing flanges.

[0007] In one embodiment of the first aspect, the inner diameter of the third cavity is smaller than the inner diameter of the second cavity, and the inner wall of the third cavity is provided with a first internal thread, while the outer wall of the front end of the feed tube is provided with a first external thread that matches the first internal thread. The smaller inner diameter of the third cavity compared to the second cavity allows the flange to be supported by the step formed between the second and third cavities, thus enabling it to be fixed axially.

[0008] In one embodiment of the first aspect, the front end of the protrusion is provided with a positioning groove, the size of which matches the outer diameter of the anti-rotating bolt. The positioning groove serves two purposes: firstly, it provides positioning to determine the angle of flange rotation; secondly, it allows the anti-rotating bolt to be partially inserted into the front surface of the protrusion, preventing flange rotation. The depth of the positioning groove does not need to be large, approximately 1 mm is sufficient.

[0009] In one embodiment of the first aspect, the number of the card slots is 2 to 50.

[0010] In one embodiment of the first aspect, the radius of the mounting end is less than or equal to the distance from the inner edge of the snap-fit ​​station to the axis.

[0011] In one embodiment of the first aspect, the front end of the flange axis is provided with a second internal thread, and the outer wall of the tail end of the nozzle is provided with a second external thread that matches the second internal thread.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When disassembling and assembling the reverse flange of this application, it is only necessary to slightly tighten the reverse top bolt to insert it into or release it from the positioning groove, so as to achieve the fixing and loosening of the flange and the flange nut. The structure is simple and the operation is convenient and quick. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the flange structure in an existing screw assembly.

[0014] Figure 2 This is a schematic diagram of the overall structure when the anti-top flange is applied to the front end of the screw in this application.

[0015] Figure 3 for Figure 2 A magnified view of a portion of region C.

[0016] Figure 4 This is a cross-sectional structural diagram of the flange nut in this application.

[0017] Figure 5 for Figure 4 A schematic diagram of the cross section of AA.

[0018] Figure 6 This is a cross-sectional structural diagram of the flange in this application.

[0019] Figure 7 for Figure 6 A schematic diagram of the cross-section of BB.

[0020] In the attached diagram, 1 is a flange nut, 11 is the first cavity, 12 is the second cavity, 13 is the third cavity, 14 is a screw hole, 15 is a snap-fit ​​platform, 16 is a mounting groove, 17 is a mounting screw hole, 2 is a flange, 21 is a snap-fit ​​end, 22 is a mounting end, 23 is a positioning groove, 24 is an internal thread, 25 is a protrusion, 26 is a snap-fit ​​groove, 3 is a feed tube, 4 is a screw, 5 is a screw head, 6 is a stop ring, 7 is a spacer, 8 is a nozzle, and 9 is a bolt. Detailed Implementation

[0021] 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.

[0022] The following describes specific embodiments of this utility model. 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 this utility model, those skilled in the art can modify and substitute the embodiments of this utility model, and the resulting embodiments are also within the protection scope of this utility model.

[0023] Traditional flanges, such as Figure 1 As shown, the system includes a flange 2 with a ring of threaded holes on its outer side and another ring of threaded holes at the front end of the feed pipe 3. During installation, the front end of the feed pipe 3 abuts against the rear end of the flange 2. Multiple bolts 9 are then inserted into the threaded holes at the front ends of the flange 2 and the feed pipe 3 to secure them. At this point, the front end of the screw 4 is inserted into the interior of the flange 2. Finally, the nozzle 8 is fixedly installed to the front end of the flange 2, completing the installation. The most time-consuming and labor-intensive part of the installation process is tightening all the bolts 9 to the front end of the feed pipe 3, ensuring that each bolt 9 is tightened evenly and meticulously. Example

[0024] The embodiments of this utility model will be described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments. Example

[0025] A screw assembly, the structure of which is as follows: Figure 2 , Figure 3 As shown, the assembly includes a feed pipe 3, a screw 4, a screw head assembly, a nozzle 8, and a top flange. The screw head assembly further includes a screw head 5, a check ring 6, and a bushing 7. The structures of the feed pipe 3, screw 4, screw head 5, check ring 6, bushing 7, and nozzle 8 are similar to those in the prior art, and will not be described in detail in this embodiment. The difference between this application and existing screw assemblies lies in the use of a top flange. The top flange consists of three parts: a flange nut 1, a flange plate 2, and a top bolt (the top bolt is not shown in the figure, but...). Figure 3 The position of the center screw hole 14 is the position for installing the top bolt.

[0026] The structure of flange nut 1 is as follows Figure 4 , Figure 5 As shown, the flange nut 1 has a through-hole at its axial center, and the channel includes a first cavity 11, a second cavity 12, and a third cavity 13 from front to back. The inner diameter of the third cavity 13 is smaller than that of the second cavity 12, and the inner wall of the third cavity 13 has internal threads. During installation, the third cavity 13 is fixed to the front end of the material tube 3 by these threads. The inner wall of the first cavity 11 has eight uniformly sized locking platforms 15 extending towards the axial center. Each locking platform 15 is fan-shaped, and there is a mounting groove 16 between adjacent locking platforms 15. Each locking platform 15 has a through-hole 14 for installing a countersunk bolt. When not in use, the countersunk bolt is always installed in the bolt hole 14, with the tail of the countersunk bolt flush with or slightly forward of the tail of the bolt hole 14. The second cavity 12 is a cylindrical cavity.

[0027] The structure of flange 2 is as follows Figure 6 , Figure 7 As shown, the flange 2 is T-shaped, with a mounting end 22 at the front and a snap-fit ​​end 21 at the rear. The flange 2 is also a through-type structure, and an internal thread 24 is provided on the inner wall of the front end of this channel (corresponding to the inside of the mounting end 22). The nozzle 8 is fixed to the front end of the flange 2 via this thread. The outer wall of the snap-fit ​​end 21 has eight identical protrusions 25 evenly distributed, with eight slots 26 between adjacent protrusions 25. A positioning groove 23 is provided at the front end of each protrusion 25. The outer diameter of the protrusion 25 matches the inner diameter of the second cavity 12, and the axial length of the protrusion 25 matches the axial length of the second cavity 12. In this embodiment, "matching" means being essentially the same, with a difference of 1-2 micrometers.

[0028] During installation of the reverse-top flange, align the protrusion 25 of the flange 2 with the mounting groove 16 of the flange nut 1, and align the retaining groove 26 of the flange 2 with the retaining platform 15 of the flange nut 1. This ensures unimpeded axial movement of the flange 2 and flange nut 1. Push the retaining end 21 into the second cavity 12. Since the outer diameter of the protrusion 25 matches the inner diameter of the second cavity 12, and the axial length of the protrusion 25 matches the axial length of the second cavity 12, the flange 2 can be rotated so that the protrusion 25 of the flange 2 rotates below the retaining platform 15 of the flange nut 1, aligning the bolt hole 14 with the positioning groove 23. Then rotate the reverse-top bolt so that its rear end extends out of the bolt hole 14 and inserts into the positioning groove 23 until it abuts against the bottom of the positioning groove 23. In this way, the reverse-top bolt restricts the rotation of the flange 2, while the second cavity 12 restricts the axial and radial displacement of the retaining end 21, thus securing the flange 2 to the flange nut 1.

[0029] Similarly, when it is necessary to disassemble the top flange, simply rotate the top bolt in the opposite direction to disengage it from the positioning groove 23. At this time, the flange 2 can be rotated so that the protrusion 25 of the flange 2 is realigned with the mounting groove 16 of the flange nut 1, and the locking groove 26 of the flange 2 is realigned with the locking platform 15 of the flange nut 1. Then the flange 2 can be pulled out from the flange nut 1.

[0030] 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 easy-to-disassemble reverse-top flange, characterized in that, The anti-top flange is used to connect the material pipe and the nozzle. The anti-top flange includes a flange plate, a flange nut, and an anti-top bolt. The flange nut is open at both ends, and its internal channel includes a first cavity, a second cavity, and a third cavity from front to back. The third cavity is connected to the front end of the material pipe. The inner wall of the first cavity extends towards the axis with multiple snap-fit ​​platforms. An installation groove is provided between two adjacent snap-fit ​​platforms. The radius of the second cavity is greater than or equal to the distance from the groove wall of the installation groove to the axis. The flange plate includes an installation end and a snap-fit ​​end. The snap-fit ​​end has multiple protrusions along its axial direction. A snap-fit ​​groove is formed between two adjacent protrusions. The shape and size of the snap-fit ​​groove match the snap-fit ​​platform, and the shape and size of the protrusion match the installation groove. The axial length of the snap-fit ​​end is the same as the axial length of the second cavity. A through-hole is provided on the snap-fit ​​platform, and the anti-top bolt is installed in the screw hole. The flange plate is open at both ends, and the tail end of the nozzle is installed at the front axis of the flange plate.

2. The easily detachable reverse flange as described in claim 1, characterized in that, The inner diameter of the third cavity is smaller than that of the second cavity, and the inner wall of the third cavity is provided with a first internal thread, and the outer wall of the front end of the material tube is provided with a first external thread that matches the first internal thread.

3. The easily detachable reverse flange as described in claim 1, characterized in that, The front end of the protrusion is provided with a positioning groove, the size of which matches the outer diameter of the anti-top bolt.

4. The easily detachable reverse flange as described in claim 1, characterized in that, The number of card terminals is 2 to 50.

5. The easily detachable reverse flange as described in claim 1, characterized in that, The radius of the mounting end is less than or equal to the distance from the inner edge of the snap-fit ​​station to the axis.

6. The easily detachable reverse flange as described in claim 1, characterized in that, The front end of the flange axis is provided with a second internal thread, and the outer wall of the tail end of the nozzle is provided with a second external thread that matches the second internal thread.

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