Quick dismounting and mounting device for main ejector rod of ejection cylinder of injection molding machine

Abstract

The utility model discloses a quick dismounting device for a main ejector rod of an ejector cylinder of an injection molding machine, which comprises an ejector oil cylinder, an ejector piston rod, a main ejector rod, an ejector plate, an ejector rod connecting sleeve and a fixing screw, a step shaft is arranged at the head end of the ejection piston rod, a piston rod threaded hole coaxial with the central axis of the step shaft is formed in the end of the step shaft, a central through hole matched with the step shaft is formed in the middle of the ejection plate, the ejection rod connecting sleeve is a hollow tubular body with a bottom plate at one end, and a bottom plate through hole matched with the central through hole is formed in the middle of the bottom plate. A fixing screw penetrates through a bottom plate through hole to be connected with a piston rod threaded hole and enables the ejection piston rod and the ejection rod connecting sleeve to be tightly connected with the two sides of the ejection plate respectively. The tail end of the main ejector rod is arranged in the ejector rod connecting sleeve, and at least one pair of limiting screws which penetrate through the sleeve wall and are connected with the main ejector rod are arranged on the sleeve wall of the ejector rod connecting sleeve. The main ejector rod is convenient to mount and dismount, and the ejector plate is not easy to loosen when the main ejector rod is replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of ejector cylinder equipment of an injection molding machine, in particular to a quick disassembly and assembly device for a main ejector rod of an ejector cylinder of an injection molding machine. Background Art

[0002] During the injection molding production process, the function of the ejector cylinder is to drive the piston rod and drive the main ejector rod to move, so as to eject the product from the mold; the existing main ejector rod adopts a double-headed internal thread, which is only suitable for ejecting the ejector plate, and cannot realize the ejector plate being pulled back to its original position before the mold is closed. Because after the right-handed screw hole on the mold is tightened with the connecting rod and connected with the main ejector rod, the main ejector rod cannot be tightened with the piston rod by thread. If the main ejector rod is tightened with the piston rod, the right-handed threads of the connecting rod and the main ejector rod will be loosened, and the connection length cannot be controlled; at the same time, when changing products during injection molding production, it is usually necessary to replace the main ejector rod, and the main ejector rod of the existing structure is also difficult to disassemble and assemble. Utility Model Content

[0003] The utility model aims to solve the problem that it is troublesome to replace the main ejector rod of the ejector cylinder and the ejector plate is easily loosened, and to provide a quick disassembly and assembly device for the main ejector rod of the ejector cylinder of an injection molding machine, which is convenient to install and disassemble and the ejector plate is not easy to loosen when the main ejector rod is replaced.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A quick disassembly and assembly device for a main ejector rod of an ejection cylinder of an injection molding machine comprises an ejection oil cylinder, an ejection piston rod, and a main ejector rod, wherein the main ejector rod is connected to the ejection piston rod, and further comprises an ejection plate, an ejector rod sleeve, and a fixing screw; the ejection piston rod head end is provided with a step shaft, the step shaft end is provided with a piston rod threaded hole coaxial with the step shaft center axis, the ejection plate is provided with a center through hole matching the step shaft in the middle, the ejection rod sleeve is a hollow tubular body provided with a bottom plate at one end, the bottom plate is provided with a bottom plate through hole matching the center through hole in the middle, the fixing screw passes through the bottom plate through hole and is connected with the piston rod threaded hole, and the ejection piston rod and the ejector rod sleeve are respectively tightly connected to both sides of the ejection plate; the tail end of the main ejector rod is arranged in the ejector rod sleeve, and the ejector rod sleeve pipe wall is provided with at least one pair of limit screws passing through the pipe wall and connected to the main ejector rod.

[0006] This solution improves the original structure in which the main ejector rod is directly connected to the ejector plate, into a structure in which the main ejector rod and the ejector plate are connected and fixed by an ejector rod sleeve, and the ejector plate is connected and fixed to the ejector piston rod by the ejector rod sleeve. During the disassembly and assembly of the main ejector rod, the ejector plate remains stationary, thus overcoming the problem of looseness of the ejector plate. At the same time, after the main ejector rod and the ejector rod sleeve are sleeved, a limit screw is added from the side to limit the structure of the main ejector rod, so that the disassembly and assembly process only requires the removal of one set of limit screws, thereby reducing the difficulty and strength of replacement.

[0007] As a preferred solution of the utility model, the ejector rod connector is provided with a plug-in fixing plate, a pair of limit through holes are provided on the wall of the ejector rod connector, the tail end of the main ejector rod is provided with a limit platform matched with the limit through hole, the plug-in fixing plate is arranged in the limit through hole and the bottom is close to the limit platform, and the limit screw passes through the plug-in fixing plate and is threadedly connected and fixed with the main ejector rod. This solution adopts a plug-in fixing plate, which has a better positioning effect on the main ejector rod and the ejector rod connector. The plug-in fixing plate cooperates with the limit through hole and the limit platform, and is connected and fixed with the main ejector rod by a limit screw, so that the main ejector rod and the ejector rod connector are fixedly connected.

[0008] As a preferred solution of the utility model, the ejector plate is provided with a plurality of ejector rods and ejector rod fixing bolts, the ejector rod tail end surface is provided with an ejector rod threaded hole that penetrates into the ejector rod, the ejector plate is provided with a plurality of concentric through holes on concentric circles centered on the ejector plate central through hole, one end of the concentric through hole is provided with a positioning groove that matches the ejector rod tail end, the ejector rod tail end is arranged in the positioning groove, and the ejector rod fixing bolt passes through the concentric through hole and is threadedly connected with the ejector rod threaded hole. The ejector rod of this solution is connected with screws behind the ejector plate as a secondary ejector rod, which solves the problem of tightening the external thread on the original secondary ejector rod, and thus solves the problem of forcibly pulling and resetting the ejector plate if a secondary ejector rod is used.

[0009] As a preferred solution of the utility model, the ejection oil cylinder rod end is provided with a fixed sleeve and a plurality of ejection guide rods, one end of the ejection guide rod is fixedly connected to the fixed sleeve, and the other end extends outward through the ejection plate, and the ejection guide rod is movably connected to the ejection plate. The function of the ejection guide rod in this solution is to limit the ejection plate and the ejector rod to move forward and backward only along the ejection guide rod to avoid offset.

[0010] As a preferred solution of the utility model, the ejector plate is cross-shaped, the main ejector rod is connected to the cross center of the ejector plate, the four wings of the ejector plate are respectively provided with an ejector rod and an ejector guide rod, one end of the ejector rod is connected to the ejector plate, and one end of the ejector guide rod passes through the ejector plate and is connected to the ejector oil cylinder. The cross-shaped ejector plate of this solution can reduce its own weight and easily mark the positions of the ejector rod and the ejector guide rod.

[0011] Compared with the prior art, the utility model has the beneficial effects of being easy to install and disassemble, and the ejector plate is not easy to loosen when the main ejector rod is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 The utility model is a schematic diagram of a cross-sectional structure.

[0014] In the figure: 1. Ejector cylinder 2. Ejector piston rod 3. Main ejector rod 4. Ejector plate

[0015] 5. Ejector rod socket 6. Fixing screw 7. Insert fixing plate

[0016] 8. Ejector rod 9. Ejector rod fixing bolt 10. Fixing sleeve

[0017] 11. Eject the guide rod. DETAILED DESCRIPTION

[0018] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0021] For example, please refer to Figure 1-2 , the utility model provides a technical solution:

[0022] A quick disassembly and assembly device for the main ejector rod of the ejection cylinder of an injection molding machine, comprising an ejection cylinder 1, an ejection piston rod 2, and a main ejector rod 3, the main ejector rod 3 being connected to the ejection piston rod 2, and also comprising an ejection plate 4, an ejector rod sleeve 5, and a fixing screw 6; the head end of the ejection piston rod 2 is provided with a step shaft, the end of the step shaft is provided with a piston rod threaded hole coaxial with the central axis of the step shaft, the middle part of the ejection plate 4 is provided with a central through hole matching the step shaft, the ejector rod sleeve 5 is a hollow tubular body with a bottom plate at one end, the middle part of the bottom plate is provided with a bottom plate through hole matching the central through hole, the fixing screw 6 passes through the bottom plate through hole and is connected to the piston rod threaded hole and tightly connects the ejection piston rod 2 and the ejector rod sleeve 5 to the two sides of the ejection plate 4 respectively; the tail end of the main ejector rod 3 is arranged in the ejector rod sleeve 5, and the tube wall of the ejector rod sleeve 5 is provided with at least one pair of limit screws passing through the tube wall and connected to the main ejector rod 3.

[0023] The ejector rod socket 5 is provided with an insert fixing plate 7, and a pair of limit through holes are provided on the tube wall of the ejector rod socket 5. The tail end of the main ejector rod 3 is provided with a limit platform matching the limit through holes. The insert fixing plate 7 is arranged in the limit through hole and the bottom is close to the limit platform. The limit screw passes through the insert fixing plate 7 and is threadedly connected and fixed to the main ejector rod 3.

[0024] The ejector plate 4 is provided with a plurality of ejector rods 8 and ejector rod fixing bolts 9. The tail end surface of the ejector rod 8 is provided with an ejector rod threaded hole that penetrates into the ejector rod 8. The ejector plate 4 is provided with a plurality of concentric through holes on concentric circles centered on the central through hole of the ejector plate 4. A positioning groove that cooperates with the tail end of the ejector rod 8 is provided at one end of the concentric through hole. The tail end of the ejector rod 8 is arranged in the positioning groove, and the ejector rod fixing bolt 9 passes through the concentric through hole and is threadedly connected with the ejector rod threaded hole.

[0025] A fixed sleeve 10 and a plurality of ejection guide rods 11 are provided at the rod end of the ejection oil cylinder 1. One end of the ejection guide rod 11 is fixedly connected to the fixed sleeve 10 and the other end extends outward through the ejection plate 4. The ejection guide rod 11 is movably connected to the ejection plate 4.

[0026] The ejector plate 4 is cross-shaped, the main ejector rod 3 is connected to the cross center of the ejector plate 4, and an ejector rod 8 and an ejector guide rod 11 are respectively provided on the four wings of the ejector plate 4. One end of the ejector rod 8 is connected to the ejector plate 4, and one end of the ejector guide rod 11 passes through the ejector plate 4 and is connected to the ejector cylinder 1.

[0027] The working process of the utility model is as follows: the main ejector rod 3 is connected and fixed with the ejector plate 4 through the ejector rod sleeve 5, and the ejector plate 4 is connected and fixed with the ejector piston rod 2 through the ejector rod sleeve 5, and the ejector plate 4 remains stationary during the disassembly and assembly of the main ejector rod 3, thus overcoming the problem of the ejector plate 4 being loose; at the same time, after the main ejector rod 3 and the ejector rod sleeve 5 are sleeved, a limit screw is added from the side to limit the structure of the main ejector rod 3, so that the disassembly and assembly process only requires the removal of one set of limit screws, thereby reducing the difficulty and strength of the replacement;

[0028] When the ejection piston rod 2 extends or retracts, it drives the ejection plate 4 to move forward and backward along the ejection guide rod 11, and the ejection plate 4 drives the main ejector rod 3 and the ejection rod 8 to move together.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick disassembly and assembly device for a main ejector rod of an ejector cylinder of an injection molding machine, comprising an ejector oil cylinder, an ejector piston rod, and a main ejector rod, wherein the main ejector rod is connected to the ejector piston rod, and is characterized in that: It also includes an ejector plate, an ejector rod socket, and fixing screws; The head end of the ejector piston rod is provided with a step shaft, the end of the step shaft is provided with a piston rod threaded hole coaxial with the central axis of the step shaft, the middle of the ejector plate is provided with a central through hole matching the step shaft, the ejector rod sleeve is a hollow tubular body with a bottom plate at one end, the middle of the bottom plate is provided with a bottom plate through hole matching the central through hole, the fixing screw passes through the bottom plate through hole and is connected to the piston rod threaded hole and the ejector piston rod and the ejector rod sleeve are respectively tightly connected to the two sides of the ejector plate; The tail end of the main ejector rod is arranged in the ejector rod sleeve, and the ejector rod sleeve pipe wall is provided with at least one pair of limit screws that pass through the pipe wall and are connected to the main ejector rod; The ejector rod connecting sleeve is provided with an insert fixing plate, a pair of limit through holes are provided on the wall of the ejector rod connecting sleeve, the tail end of the main ejector rod is provided with a limit platform matching the limit through holes, the insert fixing plate is arranged in the limit through hole and the bottom is close to the limit platform, and the limit screw passes through the insert fixing plate and is threadedly connected and fixed to the main ejector rod.

2. The quick disassembly and assembly device for the main ejector rod of the ejector cylinder of an injection molding machine according to claim 1, characterized in that: The ejector plate is provided with a plurality of ejector rods and ejector rod fixing bolts. The ejector rod tail end surface is provided with an ejector rod threaded hole that penetrates into the ejector rod. The ejector plate is provided with a plurality of concentric through holes on concentric circles centered on the central through hole of the ejector plate. One end of the concentric through hole is provided with a positioning groove that matches the ejector rod tail end. The ejector rod tail end is arranged in the positioning groove. The ejector rod fixing bolt passes through the concentric through hole and is threadedly connected to the ejector rod threaded hole.

3. The quick disassembly and assembly device for the main ejector rod of the ejector cylinder of an injection molding machine according to claim 1, characterized in that: The ejection oil cylinder rod end is provided with a fixed sleeve and a plurality of ejection guide rods, one end of the ejection guide rod is fixedly connected to the fixed sleeve, and the other end extends outward through the ejection plate, and the ejection guide rod is movably connected to the ejection plate.

4. The quick disassembly and assembly device for the main ejector rod of the ejector cylinder of an injection molding machine according to claim 1, characterized in that: The ejector plate is cross-shaped, the main ejector rod is connected to the cross center of the ejector plate, the four wings of the ejector plate are respectively provided with an ejector rod and an ejector guide rod, one end of the ejector rod is connected to the ejector plate, and one end of the ejector guide rod passes through the ejector plate and is connected to the ejector cylinder.

Images