Injection molding machine nozzle convenient to disassemble and assemble

Abstract

The utility model belongs to the technical field of injection molding, and particularly relates to an injection molding machine nozzle convenient to disassemble and assemble, which comprises a mounting seat, an injection hole vertically penetrating through the middle of the mounting seat, a nozzle arranged at the upper end of the mounting seat, and a feeding end of the nozzle connected with the injection hole; the upper end of the mounting seat is detachably connected with a connecting cylinder, the upper end of the connecting cylinder is sleeved outside the spray head, and the inner peripheral wall of a partial length section of the upper end of the connecting cylinder protrudes inwards to form a circle of supporting bulge which is attached to and supported outside the spray head; the lower end of the spray head is sleeved with a spiral spring, the lower end of the spiral spring abuts against a shaft shoulder arranged at the lower end of the spray head, the upper end of the connecting cylinder is sleeved with a pressing ring, and a plurality of threaded holes and screws are evenly formed in the peripheral face of the pressing ring along the circumference. Long-strip-shaped receding holes are formed in the positions, corresponding to the inner ends of the screws, of the connecting cylinders so that the screws can penetrate through the receding holes and extend to the positions above the upper ends of the spiral springs; the nozzle has the advantages of being more convenient to disassemble and assemble, and more reliable in butt joint of the nozzle and the injection molding machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding, and in particular relates to a nozzle of an injection molding machine which is easy to assemble and disassemble. Background Art

[0002] An injection molding machine, also known as an injection molding machine or injection molding machine, is the primary molding equipment used to create various shapes of plastic products from thermoplastics or thermosetting plastics using plastic molding molds. They are available in vertical, horizontal, and all-electric models. The injection molding machine heats the plastic and injects the molten plastic through a nozzle at the front end at high pressure, filling the mold cavity.

[0003] As the injection molding machine nozzle repeatedly ejects molten plastic under high pressure to fill the mold cavity, it operates under high temperature and pressure. This makes the nozzle one of the most vulnerable components of the machine. Furthermore, the injection molding machine's frequent starts and stops can easily clog the nozzle. This requires nozzles that are easy to disassemble and clean. Existing nozzles often have inconvenient connections to the machine, and during assembly, the nozzle connection is unreliable and poorly designed, making assembly difficult.

[0004] Therefore, how to provide an injection molding machine nozzle that is simple in structure, can be more conveniently disassembled and assembled, and has a more reliable connection between the nozzle and the injection molding machine and is easy to disassemble and assemble has become a technical problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide an injection molding machine nozzle that is simple in structure, can be more conveniently disassembled and assembled, and can more reliably connect the nozzle to the injection molding machine and is easy to disassemble and assemble.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a nozzle for an injection molding machine that is easy to disassemble and assemble, comprising a mounting base, a middle portion of which is provided with an injection hole vertically extending therethrough, an upper end of the mounting base being provided with a nozzle, and a feed end of the nozzle being connected to the injection hole; characterized in that a connecting cylinder is detachably connected to the upper end of the mounting base, the upper end of the connecting cylinder is sleeved on the outside of the nozzle, and the upper end of the connecting cylinder has an inner circumferential wall of a partial length section protruding inwardly to form a circle of supporting protrusions and supporting the outside of the nozzle; a coil spring is sleeved on the lower end of the nozzle, the lower end of the coil spring abuts on a shaft shoulder provided at the lower end of the nozzle, a pressure ring is sleeved on the upper end of the connecting cylinder, a plurality of threaded holes are uniformly provided on the outer circumference of the pressure ring and screws are provided, and a long strip-shaped clearance hole is provided on the connecting cylinder corresponding to the inner end of each screw for the screw to pass through and extend above the upper end of the coil spring; a pressing nut is also provided on the upper end of the connecting cylinder, and can push the pressing ring to move downward so that the screw compresses the coil spring and pushes the nozzle to abut and support on the mounting base.

[0007] In this way, when assembling the above-mentioned injection molding machine nozzle, the coil spring is placed on the upper end of the nozzle, and then the nozzle is docked and placed on the mounting seat, and the feed end of the nozzle is connected to the injection hole. Afterwards, the pressure ring is placed on the connecting tube, the screws are placed in the threaded holes accordingly, and the screws are passed through the clearance holes on the connecting tube. Then, the connecting tube is placed on the outside of the nozzle from top to bottom, and then the lower end of the connecting tube is connected to the mounting seat. A downward nut is set at the upper end of the connecting tube. The downward nut pushes the pressure ring downward so that the screw compresses the coil spring and pushes the nozzle to abut against the support on the mounting seat. Compared with the existing structure that applies a clamping force to tighten the nozzle while assembling, the above-mentioned structure is more convenient to complete the assembly operation. The connection assembly and the clamping are completed separately, which is convenient to operate and can better avoid relative rotation between the mating surfaces, thereby better ensuring accuracy. In addition, the designed support protrusion can better ensure that the mounting seat and the nozzle are coaxial, thereby improving installation accuracy.

[0008] As an optimization, an abutment gasket is also provided on the nozzle, and the abutment gasket is located between the upper end of the coil spring and the screw.

[0009] In this way, by arranging the abutment gasket between the upper end of the coil spring and the screw, the screw can better exert force and compress the coil spring, thereby reducing resistance and better avoiding the jamming phenomenon.

[0010] As an optimization, the mounting seat includes a connecting column at the upper end, the connecting tube is threadedly connected to the connecting column, and a locking nut is also provided on the connecting column, and the upper end of the locking nut can be abutted and supported on the lower end surface of the connecting tube.

[0011] In this way, the connecting tube and the mounting seat are connected through threads, which makes disassembly and assembly more convenient, and the provided locking nut can lock the connecting tube to prevent it from rotating.

[0012] As an optimization, the upper end of the connecting column has a docking joint that protrudes upward and has a smaller diameter at the upper end and a larger diameter at the lower end. A docking hole is provided on the lower end surface of the nozzle corresponding to the docking joint for the docking joint to extend into.

[0013] In this way, during assembly, it is more convenient to connect the connecting column and the nozzle, so that the two are better coaxially arranged and the nozzle feed end and the injection hole are better connected together.

[0014] As an optimization, the upper end surface of the docking joint is an overall convex spherical structure, and the bottom surface of the docking hole is an overall concave spherical structure and is arranged in coordination with the end surface of the docking joint.

[0015] In this way, the butt joint and the nozzle are better abutted against each other, and the connection between the two is more reliable and tighter.

[0016] As an optimization, a sealing gasket is sleeved on the outside of the docking joint, and after the docking joint is inserted into the docking hole, the lower end face of the nozzle and the upper end face of the connecting column can each be abutted and supported on both sides of the sealing gasket.

[0017] In this way, heat leakage can be better avoided and the design is more reasonable.

[0018] As an optimization, four threaded holes are provided on the outer peripheral surface of the pressure ring and evenly distributed along the circumference.

[0019] In this way, the design is more reasonable and the force on the coil spring is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an injection molding machine nozzle that is easy to disassemble and assemble in a specific embodiment of the utility model.

[0021] Figure 2 yes Figure 1 Schematic cross-sectional view of .

[0022] Figure 3 for Figure 2 A partial enlarged view of position A in FIG. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, in the description of the present invention, the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicating directions or positions, are based on the directions or positions shown in the accompanying drawings and are intended solely for the purpose of facilitating and simplifying the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific manner. Therefore, they should not be construed as limiting the present invention. The terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] See also Figures 1 to 3The figure shows: a nozzle of an injection molding machine that is easy to disassemble and assemble, comprising a mounting base 1, an injection hole 2 vertically penetratingly arranged in the middle of the mounting base, a nozzle 3 provided at the upper end of the mounting base, and the nozzle feed end is connected to the injection hole; a connecting cylinder 4 is detachably connected to the upper end of the mounting base, the upper end of the connecting cylinder is sleeved on the outside of the nozzle, and the upper end of the connecting cylinder has an inner circumferential wall of a partial length section protruding inwardly to form a circle of supporting protrusions 5 and supported against the outside of the nozzle; a coil spring 6 is sleeved on the lower end of the nozzle, and the lower end of the coil spring abuts on the shaft shoulder 7 provided at the lower end of the nozzle, a pressure ring 8 is sleeved on the upper end of the connecting cylinder, and a plurality of threaded holes are uniformly provided on the outer circumference of the pressure ring and along the circumference, and screws 9 are provided. The inner ends of the corresponding screws on the connecting cylinder are provided with long strip-shaped clearance holes 10 for the screws to pass through and extend above the upper end of the coil spring; a pressing nut 11 is also provided at the upper end of the connecting cylinder, and can push the pressing ring to move downward so that the screw compresses the coil spring and pushes the nozzle to abut and support on the mounting base.

[0025] In this way, when assembling the above-mentioned injection molding machine nozzle, the coil spring is placed on the upper end of the nozzle, and then the nozzle is docked and placed on the mounting seat, and the feed end of the nozzle is connected to the injection hole. Afterwards, the pressure ring is placed on the connecting tube, the screws are placed in the threaded holes accordingly, and the screws are passed through the clearance holes on the connecting tube. Then, the connecting tube is placed on the outside of the nozzle from top to bottom, and then the lower end of the connecting tube is connected to the mounting seat. A downward nut is set at the upper end of the connecting tube. The downward nut pushes the pressure ring downward so that the screw compresses the coil spring and pushes the nozzle to abut against the support on the mounting seat. Compared with the existing structure that applies a clamping force to tighten the nozzle while assembling, the above-mentioned structure is more convenient to complete the assembly operation. The connection assembly and the clamping are completed separately, which is convenient to operate and can better avoid relative rotation between the mating surfaces, thereby better ensuring accuracy. In addition, the designed support protrusion can better ensure that the mounting seat and the nozzle are coaxial, thereby improving installation accuracy.

[0026] Specifically, the two pressing nuts are stacked and arranged in layers, which can improve reliability and better prevent them from loosening.

[0027] In this specific embodiment, an abutment gasket 12 is further provided on the nozzle, and the abutment gasket is located between the upper end of the coil spring and the screw.

[0028] In this way, by arranging the abutment gasket between the upper end of the coil spring and the screw, the screw can better exert force and compress the coil spring, thereby reducing resistance and better avoiding the jamming phenomenon.

[0029] In this specific embodiment, the mounting seat includes a connecting column 13 at the upper end, the connecting tube is threadedly connected to the connecting column, and a locking nut 14 is also provided on the connecting column, the upper end of the locking nut can be abutted and supported on the lower end surface of the connecting tube.

[0030] In this way, the connecting tube and the mounting base are connected by a thread, which makes disassembly and assembly more convenient, and the provided locking nut can lock the connecting tube to prevent it from rotating. Specifically, the locking nuts are two stacked to improve the reliability of the locking.

[0031] In this specific embodiment, the upper end of the connecting column has a docking joint 15 that protrudes upward and has a smaller diameter at the upper end and a larger diameter at the lower end. A docking hole is provided on the lower end surface of the nozzle corresponding to the docking joint for the docking joint to extend into.

[0032] In this way, during assembly, it is more convenient to connect the connecting column and the nozzle, so that the two are better coaxially arranged and the nozzle feed end and the injection hole are better connected together.

[0033] In this specific embodiment, the upper end surface of the docking joint 15 is an overall convex spherical structure, and the bottom surface of the docking hole is an overall concave spherical structure and is arranged in coordination with the end surface of the docking joint.

[0034] In this way, the butt joint and the nozzle are better abutted against each other, and the connection between the two is more reliable and tighter.

[0035] In this specific embodiment, a sealing gasket 16 is sleeved on the outside of the docking joint, and after the docking joint is inserted into the docking hole, the lower end surface of the nozzle and the upper end surface of the connecting column can each be supported on both sides of the sealing gasket.

[0036] In this way, heat leakage can be better avoided and the design is more reasonable.

[0037] In this specific embodiment, four threaded holes are evenly arranged on the outer circumference of the pressure ring.

[0038] In this way, the design is more reasonable and the force on the coil spring is more uniform.

[0039] In summary, the above device has the characteristics of simple structure, more convenient disassembly and assembly, and more reliable docking between the nozzle and the injection molding machine.

[0040] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A nozzle for an injection molding machine that is easy to assemble and disassemble, comprising a mounting base, a vertically extending injection hole provided in the middle of the mounting base, a nozzle provided at the upper end of the mounting base, and a nozzle feed end connected to the injection hole; characterized in that: A connecting tube is detachably connected to the upper end of the mounting seat, and the upper end of the connecting tube is sleeved on the outside of the nozzle, and the upper end of the connecting tube has a partial length section of the inner circumferential wall protruding inward to form a circle of supporting protrusions and supported on the outside of the nozzle; a coil spring is sleeved on the lower end of the nozzle, and the lower end of the coil spring abuts on the shaft shoulder provided at the lower end of the nozzle, and a pressure ring is sleeved on the upper end of the connecting tube. A plurality of threaded holes and screws are provided on the outer circumference of the pressure ring and evenly along the circumference. Long strip-shaped clearance holes are provided at the inner ends of the corresponding screws on the connecting tube for the screws to pass through and extend to above the upper end of the coil spring; a downward pressure nut is also provided at the upper end of the connecting tube, and can push the pressure ring to move downward so that the screw compresses the coil spring and pushes the nozzle to abut and support on the mounting seat.

2. The easily disassembled nozzle for injection molding machine according to claim 1, characterized in that: An abutment gasket is also sleeved on the nozzle, and the abutment gasket is located between the upper end of the coil spring and the screw.

3. The easily disassembled nozzle for injection molding machine according to claim 1, characterized in that: The mounting seat includes a connecting column at the upper end, the connecting tube is threadedly connected to the connecting column, and a locking nut is also provided on the connecting column, and the upper end of the locking nut can be abutted and supported on the lower end surface of the connecting tube.

4. The easily disassembled nozzle for injection molding machine according to claim 3, characterized in that: The upper end of the connecting column is provided with a butt joint which is protruding upward and has a smaller diameter at the upper end and a larger diameter at the lower end. A butt joint is provided on the lower end surface of the nozzle corresponding to the butt joint for the butt joint to extend into.

5. The easily disassembled nozzle for injection molding machine according to claim 4, characterized in that: The upper end surface of the butt joint is in an outwardly convex spherical structure as a whole, and the bottom surface of the butt joint hole is in an inwardly concave spherical structure as a whole and is matched with the end surface of the butt joint.

6. The easily disassembled nozzle for injection molding machine according to claim 4, characterized in that: A sealing gasket is sleeved on the outside of the butt joint, and after the butt joint is inserted into the butt hole, the lower end surface of the spray head and the upper end surface of the connecting column can each be supported on both sides of the sealing gasket.

7. The easily disassembled nozzle for injection molding machine according to claim 1, characterized in that: Four threaded holes are evenly arranged on the outer circumference of the pressure ring.

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