Crosshead anti-loosening structure of injection molding machine

Abstract

The utility model discloses a crosshead anti-loosening structure of an injection molding machine, a central through hole is formed in the center of a crosshead, and the aperture of the central through hole is larger than the outer diameter of the front part of a mold locking piston rod and smaller than the outer diameter of the rear part of the mold locking piston rod; the front part of the mold locking piston rod penetrates through the central through hole; the locking nut locks and fixes the front end of the front part of the mold locking piston rod on the end surface of one side of the crosshead; an anti-loose washer is arranged between the front end of the rear part of the mold locking piston rod and the end surface of the other side of the crosshead; and the end surfaces of the two sides of the anti-loose washer are respectively propped against the front end of the rear part of the mold locking piston rod and the end surface of the other side of the crosshead. According to the utility model, the locking connection of the crosshead and the mold locking piston rod is realized through the locking nut and the lock washer, the connection looseness of the crosshead and the mold locking piston rod can be effectively prevented, and the force of the mold locking piston rod is transmitted to the crosshead through the lock washer, so that the service lives of the mold locking piston rod and the crosshead can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically to an anti-loosening structure for the crosshead of an injection molding machine. Background Technology

[0002] During injection molding, to overcome the expansion force of the melt within the cavity on the mold, a clamping force needs to be applied to the moving platen to ensure a tight fit with the stationary platen and prevent mold expansion, which would affect product quality. Currently, injection molding machines typically utilize a clamping piston cylinder. The piston rod of the clamping piston cylinder is fixed to the mold, and hydraulic force is used to push the piston of the clamping piston cylinder, thereby pushing the piston rod to output clamping force to the mold. Currently, the piston rod is directly connected to a crosshead via threaded connections, and then directly fixed to the mold using the crosshead. After repeated use, the connection between the piston rod and the crosshead is prone to loosening, affecting the transmission of clamping force. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the present invention aims to provide a crosshead anti-loosening structure for injection molding machines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A crosshead anti-loosening structure for an injection molding machine includes a locking piston rod, a crosshead, a locking nut, and an anti-loosening washer. The outer diameter of the front part of the locking piston rod is smaller than the outer diameter of the rear part, and the front end of the locking piston rod has an external thread that matches the internal thread of the locking nut. The crosshead has a central through hole, the diameter of which is larger than the outer diameter of the front part of the locking piston rod and smaller than the outer diameter of the rear part. The front part of the locking piston rod passes through the central through hole, and the locking nut locks and fixes the front end of the locking piston rod on one side of the crosshead. An anti-loosening washer is provided between the front end of the rear part of the locking piston rod and the other side of the crosshead, with the two side ends of the anti-loosening washer abutting against the front end of the rear part of the locking piston rod and the other side of the crosshead, respectively.

[0006] Furthermore, the rear end of the mold-locking piston rod has a piston connection structure for connecting the mold-locking piston.

[0007] Furthermore, the diameter of the central through hole differs from the outer diameter of the front part of the mold-locking piston rod by 1-2 mm.

[0008] Furthermore, the diameter of the central through hole differs from the outer diameter of the rear part of the mold-locking piston rod by 2-3 mm.

[0009] The beneficial effects of this utility model are as follows: This utility model achieves a locking connection between the crosshead and the mold-locking piston rod by using a locking nut and an anti-loosening washer, which can effectively prevent the connection between the crosshead and the mold-locking piston rod from loosening. Moreover, through the anti-loosening washer, the force of the mold-locking piston rod is transmitted to the crosshead, which can extend the service life of the mold-locking piston rod and the crosshead. Attached Figure Description

[0010] Figure 1 This is a general schematic diagram of the crosshead anti-loosening structure in the embodiments of this utility model;

[0011] Figure 2 This is a schematic diagram of the crosshead anti-loosening structure in an embodiment of the present invention (from another perspective);

[0012] Figure 3 This is a schematic diagram of the mold-locking piston rod in an embodiment of the present invention;

[0013] Figure 4 This is a schematic diagram of the crosshead structure in an embodiment of this utility model. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings. It should be noted that this embodiment is based on the present technical solution and provides detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to this embodiment.

[0015] This embodiment provides an anti-loosening structure for the crosshead of an injection molding machine, such as... Figure 1 As shown in Figure 4, the device includes a locking piston rod 1, a crosshead 2, a locking nut 3, and an anti-loosening washer 4. The outer diameter of the front part 11 of the locking piston rod 1 is smaller than the outer diameter of the rear part 12 of the locking piston rod 1, and the front end of the front part 11 of the locking piston rod 1 has an external thread 13 that matches the internal thread of the locking nut 3. The crosshead 2 has a central through hole 21, the diameter of which is slightly larger than the outer diameter of the front part 11 of the locking piston rod 1 (by about 1-2 mm) and smaller than the locking nut 3. The outer diameter of the rear part 12 of the mold piston rod 1 differs by about 2-3 mm; the front part 11 of the mold locking piston rod 1 passes through the central through hole 21, and the locking nut 3 locks and fixes the front end of the front part 11 of the mold locking piston rod 1 on one side end face of the crosshead 2; an anti-loosening washer 4 is provided between the front end of the rear part 12 of the mold locking piston rod 1 and the other side end face of the crosshead 2, and the two side end faces of the anti-loosening washer 4 abut against the front end of the rear part 12 of the mold locking piston rod 1 and the other side end face of the crosshead 2, respectively.

[0016] In this embodiment, the rear end of the mold-locking piston rod 1 has a piston connection structure 14 for connecting the mold-locking piston 5.

[0017] In use, the crosshead 2 and the moving platen of the injection molding machine are installed and fixed. When the clamping piston rod 1 moves forward under hydraulic thrust within the clamping piston cylinder, it generates clamping force on the crosshead 2 and the mold. The locking connection between the crosshead and the clamping piston rod is achieved through a locking nut and an anti-loosening washer, effectively preventing loosening of the connection. Furthermore, the anti-loosening washer transmits the force of the clamping piston rod to the crosshead, providing some shock absorption and extending the service life of both the clamping piston rod and the crosshead.

[0018] For those skilled in the art, various corresponding changes and modifications can be made based on the above technical solutions and concepts, and all such changes and modifications should be included within the protection scope of the claims of this utility model.

Claims

1. A crosshead anti-loosening structure for an injection molding machine, characterized in that, The device includes a mold-locking piston rod (1), a crosshead (2), a locking nut (3), and an anti-loosening washer (4). The outer diameter of the front part (11) of the mold-locking piston rod (1) is smaller than the outer diameter of the rear part (12) of the mold-locking piston rod (1), and the front end of the front part (11) of the mold-locking piston rod (1) has an external thread (13) that matches the internal thread of the locking nut (3). The crosshead (2) has a central through hole (21) at its center. The diameter of the central through hole (21) is larger than the outer diameter of the front part (11) of the mold-locking piston rod (1) and smaller than the outer diameter of the mold-locking piston. The outer diameter of the rear part (12) of the rod (1); the front part (11) of the mold locking piston rod (1) passes through the central through hole (21), and the locking nut (3) locks and fixes the front end of the front part (11) of the mold locking piston rod (1) on one side end face of the crosshead (2); an anti-loosening washer (4) is provided between the front end of the rear part (12) of the mold locking piston rod (1) and the other side end face of the crosshead (2), and the two side end faces of the anti-loosening washer (4) abut against the front end of the rear part (12) of the mold locking piston rod (1) and the other side end face of the crosshead (2) respectively.

2. The anti-loosening structure for the crosshead of the injection molding machine according to claim 1, characterized in that, The rear end of the mold-locking piston rod (1) has a piston connection structure (14) for connecting the mold-locking piston (5).

3. The anti-loosening structure for the crosshead of the injection molding machine according to claim 1, characterized in that, The diameter of the central through hole (21) differs from the outer diameter of the front part (11) of the mold-locking piston rod (1) by 1-2 mm.

4. The anti-loosening structure for the crosshead of the injection molding machine according to claim 1, characterized in that, The diameter of the central through hole (21) differs from the outer diameter of the rear part (12) of the mold-locking piston rod (1) by 2-3 mm.

Images