Piston rod assembly of injection molding machine

Abstract

The utility model discloses a piston rod assembly of an injection molding machine. According to the technical scheme, the piston rod assembly comprises an inner rod body with a piston; the outer rod body is in threaded connection with the inner rod body; the telescopic dustproof sleeve is arranged on the outer rod body; the fixed ring sheet is mounted at the upper end of the telescopic dustproof sleeve; the fixing ring piece is provided with a penetrating hole penetrating through an oil cylinder pull rod, the fixing ring piece is rotationally connected with a locking nut, the locking nut is hung on the fixing ring piece, and the locking nut is in threaded connection with the oil cylinder pull rod so that the fixing ring piece can be clamped by the locking nut of the oil cylinder and the oil cylinder pull rod. The telescopic dust-proof sleeve and the cylinder body are respectively installed by adopting the split piston rod body, then the telescopic dust-proof sleeve and the cylinder body are combined and fixed, and the fixed ring piece and the cylinder body are rapidly fixed by virtue of the locking nut, so that rapid installation of the dust-proof sleeve and the oil cylinder is conveniently completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a piston rod, more specifically, it relates to a piston rod assembly of injection molding machine. BACKGROUND

[0002] Horizontal injection molding machine will adopt the cleaning roller of lifting to clean the cavity of mold, so that the rubber ring is separated from the mold cavity and then freely falls under the action of gravity.

[0003] As the Chinese patent file with the announcement number CN216635123U, browse its attached Figure 1 And the description

[0038] paragraph records "horizontal vacuum injection molding machine also includes mold cleaning mechanism 2", has disclosed similar lifting cleaning roller structure; the lifting cleaning roller structure of this kind mostly adopts oil cylinder drive to realize the vertical lifting action.

[0004] The piston rod of the oil cylinder moves up and down to enter and exit the mold plate, in order to reduce the piston rod is connected with dust impurities, and the hot gas influence when opening the mold, will increase a dustproof cover structure outside the piston rod;

[0005] The oil cylinder needs to install the piston rod in the cylinder body during installation, then the opening is sealed through the cover, and the cover is pulled tight through the pull rod, and the telescopic sleeve and the piston rod are fixed as a whole, which makes it difficult to cover the opening of the oil cylinder, increases the assembly difficulty of the oil cylinder, the piston rod and the dustproof cover, therefore, the design aims to provide a piston rod structure with convenient installation of dustproof cover and oil cylinder. SUMMARY

[0006] The utility model discloses a kind of piston rod assemblies of injection molding machine, adopt split piston rod body, respectively install telescopic dustproof cover and cylinder body, then again two combination fixed, and rely on locking nut to fix fixed ring piece and cylinder body quickly, to complete the quick installation of dustproof cover and oil cylinder conveniently.

[0007] The above technical purpose of the utility model is realized by the following technical scheme:

[0008] A kind of piston rod assembly of injection molding machine, comprising: the inner rod body with piston;Threadedly connected in the outer rod body of inner rod body;Telescopic dustproof cover installed in outer rod body;Fixed ring piece is installed on the upper end of telescopic dustproof cover;Fixed ring piece is provided with the perforation of pull rod in oil cylinder, rotatingly connected with locking nut on fixed ring piece, locking nut is hung in fixed ring piece, locking nut is threadedly connected in the pull rod of oil cylinder to realize and the fixed nut of oil cylinder clamping fixed ring piece;Fixed ring piece is equipped with the elastic sealing ring that end of oil cylinder is resisted.

[0009] Preferably, the side surface of the inner rod body and the outer rod body is fixedly connected with a side stud.

[0010] Preferably, the bottom of the telescopic dust cover is provided with a pull ring, the pull ring is sleeved on the outer rod body, the pull ring and the outer rod body are sealingly connected, the outer rod body is fixed with a stop block, and the stop block abuts against the upper surface of the pull ring.

[0011] Preferably, the stop block is provided with a magnetic sheet of the magnetic pull ring.

[0012] Preferably, the stop block is in the vertical projection of the ring mouth of the fixing ring piece, and the stop block is in the vertical projection of the inner circle of the telescopic dust cover.

[0013] Preferably, the outer section of the telescopic dust cover is larger than the outer section of the pull ring, the outer surface of the telescopic dust cover is fixed with a wire penetrating plate for penetrating the electric wire, and the wire penetrating plate is an elastic plate.

[0014] Preferably, the outer surface of the telescopic dust cover is coated with a heat insulation coating.

[0015] Preferably, the fixing ring piece is provided with a circular groove, the locking nut is fixed with a circular ring, and the circular ring is rotationally connected with the circular groove.

[0016] In summary, the utility model has at least one of the following beneficial effects:

[0017] (1) The inner rod and the outer rod are separately arranged, so that the convenience of installing the piston rod and the oil cylinder is improved;

[0018] (2) The fixing ring piece is fixed on the oil cylinder by the locking nut, and the elastic sealing ring is in a compacted state due to the pressure of the locking nut on the fixing ring piece, so that the sealing performance of the upper end of the telescopic dust cover is improved;

[0019] (3) The locking nut is in a superimposed state on the fixing nut of the oil cylinder, and the locking nut can reduce the loosening of the fixing nut;

[0020] (4) The upper end of the telescopic dust cover and the cylinder body can be installed and separated by rotating the locking nut, and the operation is convenient.

[0021] (5) The locking nut is suspended, so that the locking nut cannot be separated from the fixing ring piece, and workers do not need to additionally hold the locking nut during assembly, so that the assembly work is more convenient.

[0022] (6) The telescopic dust cover isolates the heat and pollutants outside the piston rod, so that the rod body is not easily corroded by foreign matters, and the corrosion resistance of the piston rod is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a disassembled schematic view of the inner rod and the outer rod in the embodiment;

[0024] Figure 2 is a fixed schematic view of the inner rod and the outer rod in the embodiment;

[0025] Figure 3 is Figure 2 is a sectional view at A-A in figure

[0026] Figure 4 is Figure 3 is an enlarged view of B in figure

[0027] Figure 5 is Figure 2 is a sectional view at C-C in figure

[0028] Figure 6 is a combined schematic view of the piston rod assembly and the oil cylinder in the embodiment

[0029] Figure 7 is a schematic view of the outer coating of the telescopic dust cover in the embodiment

[0030] Figure 8 is a structural schematic view of the piston rod, the oil cylinder and the cleaning roller in the embodiment

[0031] in the figure:

[0032] 11, piston; 12, inner rod body; 13, outer rod body; 14, side stud

[0033] 2, telescopic dust cover; 21, threading plate

[0034] 3, fixed ring piece; 31, perforation; 32, locking nut; 33, elastic sealing ring

[0035] 41, pull ring; 42, stop block; 43, magnetic sheet

[0036] 5, thermal coating

[0037] 61, circular groove; 62, circular ring

[0038] 71, cylinder body; 72, pull rod; 73, fixing nut; 74, motor; 75, cleaning roller DETAILED DESCRIPTION

[0039] The utility model will be further explained in detail in combination with the drawings.

[0040] Embodiment 1, a piston rod assembly of an injection molding machine, referring to Figure 1 , comprising piston 11, piston 11 is fixed with inner rod body 12, inner rod body 12 outer end is installed with outer rod body 13, and inner rod body 12 and outer rod body 13 are all made of 40Cr steel, and 40Cr steel has good hardenability and low-temperature impact toughness, so that the fatigue resistance of piston rod is excellent.

[0041] inner rod body 12 and outer rod body 13 are fixed by thread connection through thread column and thread hole, and the side surface of inner rod body 12 and outer rod body 13 is provided with connecting hole

[0042] When the inner rod body 12 and the outer rod body 13 are butted, the connecting holes on the two sides of the inner rod body 12 and the outer rod body 13 are aligned, the side studs 14 are screwed into the side connecting holes of the two rod bodies, and the side locking of the inner rod body 12 and the outer rod body 13 is realized; the side connecting hole of the inner rod body 12 is a threaded hole, and the side connecting hole of the outer rod body 13 is a through hole.

[0043] The outer rod body 13 is provided with a telescopic dust cover 2, which is a rubber cover or a plastic cover and has elasticity.

[0044] The upper end of the telescopic dust cover 2 is fixed with a fixed ring piece 3, which is made of stainless steel, the outer circle of the fixed ring piece 3 is rectangular, the inner circle of the fixed ring piece 3 is circular, and the outer rod body 13 is arranged in the fixed ring piece 3.

[0045] The upper surface of the fixed ring piece 3 is fixed with an elastic sealing ring 33 by heat melting, the elastic sealing ring 33 is a rubber ring, and the outer rod body 13 is arranged in the elastic sealing ring 33; referring to Figure 6 , the elastic sealing ring 33 is used to abut against the cylinder body 71 to realize sealing of the upper end of the telescopic dust cover 2.

[0046] The lower end of the telescopic dust cover 2 is positioned in the outer rod body 13, referring to Figures 2-4 , the bottom of the telescopic dust cover 2 is provided with a pull ring 41, which is a circular metal ring, and the telescopic dust cover 2 and the pull ring 41 are fixed by heat melting.

[0047] The pull ring 41 is arranged on the outer rod body 13, and the pull ring 41 and the outer rod body 13 are sealingly connected. The inner circle of the pull ring 41 is fixed with a sealing ring, which abuts against the outer rod body 13 to realize sealing.

[0048] The outer rod body 13 is fixed with a stop block 42, and the two are welded and fixed; the stop block 42 abuts against the upper surface of the pull ring 41; the stop block 42 blocks the pull ring 41, so that the lower end of the telescopic dust cover 2 is always located below the stop block 42.

[0049] When the outer rod body 13 is extended downward, the stop block 42 pushes the pull ring 41 downward to realize pulling open of the telescopic dust cover 2.

[0050] The stop block 42 is provided with a magnetic sheet 43 for magnetically attracting the pull ring 41. The lower surface of the stop block 42 is provided with a groove, the magnetic sheet 43 is embedded in the groove, and glue is used to fix the magnetic sheet 43 in the groove. The magnetic sheet 43 contacts the pull ring 41 below to magnetically attract and fix them, which is more conducive to the stable positioning of the telescopic dust cover 2 at the position of the stop block 42.

[0051] And the fixed ring piece 3 is provided with a structure for fixedly connecting with the cylinder body 71, referring to Figure 2 and Figure 5 and Figure 6The fixed ring piece 3 is provided with a through hole 31, and the pull rod 72 of the oil cylinder is inserted into the through hole 31. The through hole 31 has four through holes, and the positions of the through hole 31 correspond to the positions of the four pull rods 72.

[0052] With reference to Figure 5 The lower surface of the fixed ring piece 3 is welded with an annular block. The annular block is a metal block, and a circular groove 61 is arranged in the annular block coaxially with the through hole 31.

[0053] A circular ring 62 is embedded in the circular groove 61, and the circular ring 62 is also arranged coaxially with the circular groove 61. The circular ring 62 and the circular groove 61 are in clearance fit, the circular ring 62 can rotate along the circular groove 61, and the circular ring 62 is in rotational connection with the circular groove 61. In addition, the upper and lower surfaces of the circular groove 61 are provided with a stop edge, so that the circular ring 62 can only rotate around its own axis in the circular groove 61, and the circular ring 62 cannot be separated from the circular groove 61, thereby realizing the suspension relationship of the circular ring 62 in the circular groove 61.

[0054] The lower end of the circular ring 62 extends downwardly with an integral connecting ring, and the connecting ring is fixed with a locking nut 32. Therefore, the locking nut 32 is also suspended on the annular block of the circular groove 61.

[0055] The locking nut 32, the circular ring 62 and the through hole 31 are in communication with each other.

[0056] The assembly principle is that the inner rod body 12 and the piston 11 are installed in the cylinder body 71, the end portion of the cylinder body 71 is sleeved on the inner rod body 12 to seal the cylinder body 71, and then the locking nuts are used to lock the end covers of the cylinder body 71 through the pull rod 72.

[0057] For the outlet end of the cylinder body 71, the pull rod 72 is locked by the fixed nut 73, and then the inner rod body 12 and the outer rod body 13 are fixed, the through hole 31 is aligned with the pull rod 72, and the end portion of the pull rod 72 is connected with the locking nut 32. With the tightening of the locking nut 32, the fixed ring piece 3 moves towards the cylinder body 71 until the locking nut and the fixed nut 73 clamp the fixed ring piece 3. At this time, the elastic sealing ring 33 also abuts against and seals the end portion of the cylinder body 71.

[0058] Due to the split design of the piston 11 rod and the quick connection mode of the fixed nut 73 and the pull rod 72, the piston 11 rod with the telescopic sealing sleeve can be conveniently installed on the cylinder body 71.

[0059] Embodiment 2, a piston rod assembly of an injection molding machine, which is different from embodiment 1 in that Figure 3, the stopper 42 is in the vertical projection of the fixed ring piece 3 ring mouth, the design is to facilitate the extension dust cover 2 to take out, the stopper 42 can be quickly separated from the fixed ring piece 3; the stopper 42 is in the vertical projection of the inner circle of the extension dust cover 2, the design is to facilitate the extension dust cover 2 to take out, the stopper 42 can be quickly separated from the extension dust cover 2; the design of the above structure is to quickly separate the extension dust cover 2 from the lower rod body when the extension dust cover 2 is damaged and replaced, and the separation mode is to press the extension dust cover 2 downward to overcome the magnetic force and make the extension dust cover 2 separate from the outer rod body 13.

[0060] The outer surface of the extension dust cover 2 is fixed with a wire penetrating plate 21 for penetrating the wire, and the wire penetrating plate 21 is an elastic rubber plate. The wire penetrating plate 21 is used for wire penetration, and the wire is used to provide power supply to the power equipment of the lower cleaning roller 75. The wire hole of the wire penetrating plate 21 is large enough for the wire to slide in the wire hole, so that the wire can slide freely in the wire hole during the lifting of the piston 11 rod.

[0061] During the retraction of the piston 11 rod, there is a risk of the pull ring 41 and the fixed ring piece 3 pressing the wire; the following structure is adopted to overcome the risk of wire pressing, the outer cross section of the extension dust cover 2 is larger than the outer cross section of the pull ring 41, and the area of the outer cross section of the extension dust cover 2 is large enough to block the wire with the outer wall of the extension dust cover 2, so that the wire is blocked in the pull ring 41, and the pull ring 41 cannot press the wire.

[0062] Embodiment 3, a piston rod assembly of an injection molding machine, which is different from the piston rod assembly of embodiment 1 or embodiment 2, and the difference is that Figure 7 The outer surface of the extension dust cover 2 is coated with a heat insulation coating 5, which is a nano heat insulation coating or a sensitive heat insulation coating: coated, mainly to reduce the heat transfer to the inside of the extension dust cover 2.

[0063] Refer to Figure 8 The piston rod assembly is used in an injection molding machine, a cylinder body 71 can be fixed on the frame of the injection molding machine, a connecting plate can be fixedly connected to the lower end of the piston rod assembly by screws, a motor 74 is installed on the connecting plate, a rotating cleaning roller 75 is installed on the connecting plate, the motor 74 can drive the cleaning roller 75 to rotate, and the up and down movement of the piston rod can drive the cleaning roller 75 to move up and down, so as to realize the cleaning of the product in the mold of the horizontal injection molding machine.

[0064] And the injection molding machine can be provided with a guide rod for directional vertical sliding of the connecting plate, and the guide rod of the technology is not described in detail.

[0065] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above examples, and belongs to the technical scheme under the idea of the present application all belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A piston (11) rod assembly for an injection molding machine characterized by, The utility model relates to a kind of telescopic dust cover, including: With piston (11) inner stem (12); Screw connection outer stem (13) in inner stem (12); Telescopic dust cover (2) is installed in outer stem (13); Fixed ring piece (3) is installed in the upper end of telescopic dust cover (2); Fixed ring piece (3) is provided with the perforation (31) of being threaded in the pull rod (72) of oil cylinder, fixed ring piece (3) is rotatably connected with locking nut (32), locking nut (32) is suspended in fixed ring piece (3), locking nut (32) is threaded in the pull rod (72) of oil cylinder to realize and the fixed nut (73) of oil cylinder clamping fixed ring piece (3); Fixed ring piece (3) is equipped with the elastic sealing ring (33) of being in contact with the end of oil cylinder.

2. A piston (11) rod assembly for an injection molding machine as defined in claim 1, characterized in that: The side of inner stem (12) and outer stem (13) is connected with fixed side stud (14).

3. A piston (11) rod assembly for an injection molding machine as defined in claim 1, wherein: The bottom of telescopic dust cover (2) is equipped with pull ring (41), pull ring (41) is sleeved in outer stem (13), pull ring (41) and outer stem (13) are sealingly connected, outer stem (13) is fixed with stop block (42), and stop block (42) is in contact with the upper surface of pull ring (41).

4. A piston (11) rod assembly for an injection molding machine as defined in claim 3, wherein: Stop block (42) is equipped with the magnetic sheet (43) of magnetic pull ring (41).

5. A piston (11) rod assembly for an injection molding machine as defined in claim 3, wherein: Stop block (42) is in the vertical projection of ring mouth of fixed ring piece (3); Stop block (42) is in the vertical projection of inner ring of telescopic dust cover (2).

6. A piston (11) rod assembly for an injection molding machine as defined in claim 1, wherein: The outer section of telescopic dust cover (2) is greater than the outer section of pull ring (41), and the outer surface of telescopic dust cover (2) is fixed with threading plate (21) for threading electric wire, and threading plate (21) is elastic plate.

7. A piston (11) rod assembly for an injection molding machine as defined in claim 1, wherein: Telescopic dust cover (2) is coated with heat insulation coating (5) outside.

8. A piston (11) rod assembly for an injection molding machine as defined in claim 1, wherein: Fixed ring piece (3) is equipped with round groove (61), locking nut (32) is fixed with circular ring (62), and circular ring (62) is rotatably connected with round groove (61).

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