Miniature injection molding machine plunger
By setting up a push head in the plunger of the micro injection molding machine, independent disassembly and replacement of the push head is achieved, solving the problem of replacement difficulties and high cost caused by integrated plunger installation in the prior art, improving the replacement efficiency and reducing the cost of use.
Patent Information
- Application Number
- CN202421768849.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-25
AI Technical Summary
Due to the integrated configuration of existing micro injection molding machine plungers, the entire plunger needs to be replaced during replacement, which increases the cost of use and difficulty of replacement.
A miniature injection molding machine plunger is designed, allowing for independent disassembly and replacement of the push head without the need to replace the entire plunger rod. The specific steps include disassembling the installation ring, pulling out the plunger rod, rotating the threaded rotation ring counterclockwise to drive the pushing head to move, unfix and disassembly the pushing head, and installing a new pushing head.
Reduces the cost of use, simplifies the replacement process, improves the replacement efficiency, and avoids replacement difficulties caused by integrated plunger setup.
Smart Images
Figure CN222792688U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plungers for injection molding machines, in particular to a plunger for a micro injection molding machine. Background Art
[0002] An injection molding machine is a main molding device that uses a plastic molding mold to make plastic products of various shapes from thermoplastics or thermosetting plastics. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it eject and fill the mold cavity. The injection molding machines used in the prior art include screw injection molding machines and plunger injection molding machines.
[0003] Since the plunger type micro injection molding machine pushes the raw material into the plasticizing cavity at the front end of the barrel through the plunger, the long-term use of the plunger will cause great wear and tear, so the plunger needs to be replaced. Since the plunger is usually set as an integral part, the replacement requires the replacement of the entire plunger, which increases the cost of use. Therefore, we propose a plunger for a micro injection molding machine. Utility Model Content
[0004] The purpose of the utility model is to provide a micro injection molding machine plunger, which can be installed by setting a push head, specifically by disassembling the mounting ring, then pulling out the plunger rod, and then disassembling the push head, and installing a new push head. There is no need to replace the plunger rod as a whole, thereby reducing the cost of use. The replacement is convenient and efficient, which solves the problem that the existing plunger is usually arranged in one piece, so the entire plunger needs to be replaced for replacement, thereby increasing the cost of use.
[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:
[0006] The utility model is a micro injection molding machine plunger, comprising a plunger barrel, a feed port is provided on the top of the plunger barrel, a plunger rod is arranged inside the plunger barrel, a threaded swivel is arranged on the left side of the plunger rod, a plunger connecting rod is arranged on the left side of the threaded swivel, and a push head is sleeved on the left side of the plunger connecting rod;
[0007] The right side of the plunger cylinder is fixedly connected with a mounting ring by bolts, and the right side of the pusher head is provided with a circular groove, and the left side of the inner wall of the circular groove is fixedly connected with a threaded block, and the inner wall of the circular groove is provided with a plurality of limit grooves. By setting the pusher head, specifically, the mounting ring is disassembled, and then the plunger rod is pulled out, and then the threaded swivel is rotated counterclockwise to make the threaded block drive the pusher head to move to the left. When the threaded block completely leaves the threaded swivel, the pusher head is released, and then the pusher head can be pulled out to the left to be disassembled, and a new pusher head can be installed. There is no need to replace the plunger rod as a whole, which reduces the cost of use, and the replacement is convenient and efficient.
[0008] Furthermore, a plurality of limit blocks are fixedly connected to the outer surface of the plunger connecting rod, and the limit blocks are arranged in a circular array with the plunger connecting rod as the center. A cavity is opened inside the plunger rod, and a threaded ring is fixedly connected to the inner wall of the cavity. A threaded rod is threadedly connected at the center of the threaded ring. The right side of the pusher head is plugged into the left side of the plunger connecting rod, and the limit block enters the limit groove to limit the pusher head so that the pusher head can move in a straight line.
[0009] Furthermore, an annular limiting groove is provided on the corresponding side of the plunger rod and the plunger connecting rod, and the inner walls of the two annular limiting grooves are rotatably connected with connecting rings, the right side of the connecting ring on the left side is fixedly connected to the left side of the threaded swivel, and the left side of the connecting ring on the right side is fixedly connected to the right side of the threaded swivel, the front and back sides of the plunger rod are fixedly connected with connecting frames, and the other ends of the two connecting frames are fixedly connected to the front and back sides of the plunger connecting rod, an annular groove is provided on the outer surface of the pushing head, and a sealing ring is sleeved on the inner wall of the annular groove. The sealing ring plays a sealing role to prevent material from entering the right side of the pushing head, and the connecting frame is used to connect the plunger rod and the plunger connecting rod so that the plunger connecting rod is supported.
[0010] Furthermore, the inner wall of the mounting ring is fixedly connected to the limit frame, and the outer surface of the plunger rod is provided with a plurality of slide grooves, the inner wall of the slide groove is in contact with the outer surface of the limit frame, and a rotating hole is provided at the center of the limit frame, and the inner wall of the rotating hole is rotatably connected with the outer surface of the threaded rod. By setting the limit frame, specifically by driving the threaded rod to rotate through a driving device, the threaded ring drives the plunger rod to move to the left or right, and the plunger connecting rod drives the pushing head to move together, and the plunger rod slides on the limit frame, so that the plunger rod can make a linear motion. At the same time, through the slow rotation of the threaded rod, the pushing speed and pushing amount can be better controlled, making the injection molding more precise.
[0011] Furthermore, the right side of the push head is plugged into the plunger connecting rod through a circular groove, the limit groove is adapted to the limit block, the inner wall of the plunger connecting rod is rotatably connected to the outer surface of the threaded swivel, and the plug-in arrangement of the push head and the plunger connecting rod can facilitate installation and improve installation and disassembly efficiency.
[0012] Furthermore, the inner wall of the threaded swivel is rotatably connected to the outer surface of the plunger rod, the left side of the threaded swivel is threadedly connected to the threaded block, the plunger rod is slidably connected to the limit frame through a slide groove, the outer surface of the pusher head is plugged into the inner wall of the plunger barrel, the left side of the mounting ring is plugged into the right side of the plunger barrel, and the limit frame is used to limit the plunger rod so that the plunger rod moves in a straight line.
[0013] The utility model has the following beneficial effects:
[0014] 1. The utility model sets a push head, specifically, the mounting ring is disassembled, the plunger rod is then pulled out, and the threaded ring is rotated counterclockwise to make the threaded block drive the push head to move to the left. When the threaded block completely leaves the threaded ring, the push head is released, and then the push head is pulled out to the left to be disassembled, and a new push head can be installed. There is no need to replace the plunger rod as a whole, which reduces the use cost, and the replacement is convenient and efficient.
[0015] 2. The utility model sets a limit frame, specifically, drives the threaded rod to rotate through a driving device, and the threaded ring drives the plunger rod to move to the left or right, the plunger connecting rod drives the pusher head to move together, and the plunger rod slides on the limit frame, which can make the plunger rod move in a straight line. At the same time, through the slow rotation of the threaded rod, the pushing speed and pushing amount can be better controlled, making the injection molding more precise.
[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for describing the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the plunger cylinder of the utility model;
[0020] Figure 3 For this utility model Figure 2 A is a schematic diagram of the enlarged structure of the middle part;
[0021] Figure 4 This is a schematic diagram of the overall structure of the plunger rod of the utility model;
[0022] Figure 5 It is a schematic diagram of the right side structure of the pusher head of the utility model.
[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0024] 1. Plunger barrel; 11. Feed inlet; 12. Plunger rod; 121. Plunger connecting rod; 211. Limit block; 122. Threaded ring; 123. Threaded rod; 124. Threaded swivel; 241. Connecting ring; 125. Connecting frame; 13. Pushing head; 131. Threaded block; 132. Sealing ring; 133. Limit groove; 14. Mounting ring; 141. Limit frame. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] See also Figure 1-5 As shown, the utility model is a micro injection molding machine plunger, comprising a plunger barrel 1, a feed port 11 is opened at the top of the plunger barrel 1, a plunger rod 12 is arranged inside the plunger barrel 1, a threaded swivel 124 is arranged on the left side of the plunger rod 12, a plunger connecting rod 121 is arranged on the left side of the threaded swivel 124, and a push head 13 is sleeved on the left side of the plunger connecting rod 121;
[0027] A mounting ring 14 is fixedly connected to the right side of the plunger cylinder 1 by bolts, a circular groove is opened on the right side of the push head 13, a threaded block 131 is fixedly connected to the left side of the inner wall of the circular groove, and a plurality of limit grooves 133 are opened on the inner wall of the circular groove. By setting the push head 13, specifically, the mounting ring 14 is disassembled, and then the plunger rod 12 is pulled out, and then the threaded swivel 124 is rotated counterclockwise to make the threaded block 131 drive the push head 13 to move to the left. When the threaded block 131 completely leaves the threaded swivel 124, the push head 13 is released, and then the push head 13 is pulled out to the left to be disassembled, and a new push head 13 can be installed. There is no need to replace the plunger rod 12 as a whole, which reduces the cost of use, and the replacement is convenient and efficient.
[0028] A plurality of limit blocks 211 are fixedly connected to the outer surface of the plunger connecting rod 121, and the limit blocks 211 are arranged in a circular array with the plunger connecting rod 121 as the center. A cavity is opened inside the plunger rod 12, and a threaded ring 122 is fixedly connected to the inner wall of the cavity. A threaded rod 123 is threadedly connected to the center of the threaded ring 122.
[0029] An annular limiting groove is provided on the corresponding side of the plunger rod 12 and the plunger connecting rod 121, and the inner walls of the two annular limiting grooves are rotatably connected with connecting rings 241. The right side of the connecting ring 241 on the left is fixedly connected to the left side of the threaded swivel 124, and the left side of the connecting ring 241 on the right is fixedly connected to the right side of the threaded swivel 124. The front and back sides of the plunger rod 12 are fixedly connected with connecting frames 125, and the other ends of the two connecting frames 125 are fixedly connected to the front and back sides of the plunger connecting rod 121. An annular groove is provided on the outer surface of the pushing head 13, and a sealing ring 132 is sleeved on the inner wall of the annular groove.
[0030] The inner wall of the mounting ring 14 is fixedly connected to the limit frame 141, and a plurality of slide grooves are provided on the outer surface of the plunger rod 12. The inner wall of the slide groove contacts the outer surface of the limit frame 141. A rotating hole is provided at the center of the limit frame 141, and the inner wall of the rotating hole is rotatably connected to the outer surface of the threaded rod 123. By setting the limit frame 141, the threaded rod 123 is driven to rotate by a driving device, and the threaded ring 122 drives the plunger rod 12 to move to the left or right, and the plunger connecting rod 121 drives the pusher head 13 to move together, and the plunger rod 12 slides on the limit frame 141, so that the plunger rod 12 can do linear motion. At the same time, through the slow rotation of the threaded rod 123, the pushing speed and pushing amount can be better controlled, so that the injection molding is more precise.
[0031] The right side of the push head 13 is plugged into the plunger connecting rod 121 through a circular groove, the limiting groove 133 is matched with the limiting block 211, and the inner wall of the plunger connecting rod 121 is rotatably connected to the outer surface of the threaded swivel 124.
[0032] The inner wall of the threaded swivel 124 is rotatably connected to the outer surface of the plunger rod 12, the left side of the threaded swivel 124 is threadedly connected to the threaded block 131, the plunger rod 12 is slidably connected to the limit frame 141 through a slide groove, the outer surface of the push head 13 is plugged into the inner wall of the plunger tube 1, and the left side of the mounting ring 14 is plugged into the right side of the plunger tube 1.
[0033] A specific application of this embodiment is:
[0034] When in use, first put the sealing ring 132 on the push head 13, then plug the right side of the push head 13 with the left side of the plunger connecting rod 121, then the limit block 211 enters the limit groove 133, which is used to limit the push head 13, so that the push head 13 can move linearly. When the right side of the threaded block 131 contacts the left side of the threaded swivel 124, rotate the threaded swivel 124 clockwise to make the left side of the threaded swivel 124 threadedly connected with the right side of the threaded block 131. At the same time, the threaded swivel 124 drives the two connecting rings 241 to rotate on the plunger connecting rod 121 and the plunger rod 12 respectively. After 24 is threadedly connected with the threaded block 131, the threaded block 131 will be moved to the right, and the push head 13 will move together. When the right side of the inner wall of the push head 13 contacts the left side of the plunger connecting rod 121, the push head 13 can be fixed, and then the push head 13 is inserted into the right side of the plunger tube 1, and the sealing ring 132 contacts the inner wall of the plunger tube 1. When the mounting ring 14 contacts the plunger tube 1, the mounting ring 14 can be fixed with bolts. When in use, the threaded rod 123 is driven to rotate by the driving device, and the left side of the threaded rod 123 rotates on the limit frame 141, and the threaded ring 122 drives the plunger The rod 12 moves to the left or right. Since the plunger connecting rod 121 is fixed to the plunger rod 12 through the connecting frame 125, the plunger connecting rod 121 will drive the push head 13 to move along, and the plunger rod 12 slides on the limit frame 141, which can make the plunger rod 12 do linear motion. At the same time, through the slow rotation of the threaded rod 123, the pushing speed and pushing amount can be better controlled, making the injection molding more accurate. When the push head 13 moves to the right side of the feed inlet 11, the material enters the inside of the plunger barrel 1, and then the threaded rod 123 rotates in the opposite direction, causing the push head 13 to move to the left, thereby pushing the material. When the push head 13 is moved, the sealing ring 132 plays a sealing role to prevent the material from entering the right side of the push head 13. When the push head 13 needs to be replaced, the mounting ring 14 is first disassembled, and then the plunger rod 12 is pulled out, and then the threaded swivel 124 is rotated counterclockwise to make the threaded block 131 drive the push head 13 to move to the left. When the threaded block 131 completely leaves the threaded swivel 124, the push head 13 is released, and then the push head 13 is pulled out to the left to be disassembled, and the new push head 13 can be installed. There is no need to replace the plunger rod 12 as a whole, which reduces the cost of use, and the replacement is convenient and efficient.
[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A plunger for a micro injection molding machine, comprising a plunger barrel (1), a feed port (11) being provided at the top of the plunger barrel (1), a plunger rod (12) being provided inside the plunger barrel (1), a threaded swivel (124) being provided on the left side of the plunger rod (12), characterized in that: A plunger connecting rod (121) is arranged on the left side of the threaded rotating ring (124), and a material pushing head (13) is sleeved on the left side of the plunger connecting rod (121); The right side of the plunger cylinder (1) is fixedly connected to a mounting ring (14) via bolts, the right side of the pusher head (13) is provided with a circular groove, the left side of the inner wall of the circular groove is fixedly connected to a threaded block (131), and the inner wall of the circular groove is provided with a plurality of limit grooves (133).
2. A micro injection molding machine plunger according to claim 1, characterized in that: The outer surface of the plunger connecting rod (121) is fixedly connected to a plurality of limit blocks (211), and the plurality of limit blocks (211) are arranged in a circular array with the plunger connecting rod (121) as the center. A cavity is provided inside the plunger rod (12), and a threaded ring (122) is fixedly connected to the inner wall of the cavity. A threaded rod (123) is threadedly connected at the center of the threaded ring (122).
3. A micro injection molding machine plunger according to claim 2, characterized in that: An annular limiting groove is provided on the corresponding side of the plunger rod (12) and the plunger connecting rod (121); the inner walls of the two annular limiting grooves are rotatably connected with connecting rings (241); the right side of the connecting ring (241) on the left side is fixedly connected to the left side of the threaded rotating ring (124); and the left side of the connecting ring (241) on the right side is fixedly connected to the right side of the threaded rotating ring (124).
4. A micro injection molding machine plunger according to claim 3, characterized in that: The front and back sides of the plunger rod (12) are fixedly connected to connecting frames (125), and the other ends of the two connecting frames (125) are fixedly connected to the front and back sides of the plunger connecting rod (121). An annular groove is formed on the outer surface of the pusher head (13), and a sealing ring (132) is sleeved on the inner wall of the annular groove.
5. A micro injection molding machine plunger according to claim 4, characterized in that: The inner wall of the mounting ring (14) is fixedly connected to the limiting frame (141); the outer surface of the plunger rod (12) is provided with a plurality of slide grooves; the inner walls of the slide grooves are in contact with the outer surface of the limiting frame (141); a rotating hole is provided at the center of the limiting frame (141); the inner wall of the rotating hole is rotatably connected to the outer surface of the threaded rod (123).
6. A micro injection molding machine plunger according to claim 4, characterized in that: The right side of the pusher head (13) is plugged into the plunger connecting rod (121) through a circular groove, the limiting groove (133) is matched with the limiting block (211), and the inner wall of the plunger connecting rod (121) is rotatably connected to the outer surface of the threaded swivel (124).
7. A micro injection molding machine plunger according to claim 5, characterized in that: The inner wall of the threaded swivel (124) is rotatably connected to the outer surface of the plunger rod (12), the left side of the threaded swivel (124) is threadedly connected to the threaded block (131), and the plunger rod (12) is slidably connected to the limit frame (141) via a sliding groove.
8. A micro injection molding machine plunger according to claim 5, characterized in that: The outer surface of the pusher head (13) is plugged into the inner wall of the plunger barrel (1), and the left side of the mounting ring (14) is plugged into the right side of the plunger barrel (1).