Transmission shaft for injection molding machine

Abstract

The utility model discloses a transmission shaft for an injection molding machine, which comprises a transmission head, one end of the transmission head is provided with a first internal spline, the other end of the transmission head is in spline connection with a transmission shaft, one end of the transmission shaft is fixedly connected with a connector, one end of the connector far away from the transmission shaft is in spline connection with a driving rod, and the driving rod is in threaded connection with a sleeve. The end, away from the connector, of the sleeve is in threaded connection with a conical piston, and a plurality of sliding grooves are formed in the outer wall of the sleeve. The sleeve needs to be movably installed in the injection molding pipe, and a sliding block is arranged on the inner wall of the injection molding pipe and connected into the sliding groove in a sliding mode. The transmission head, the transmission shaft, the driving rod, the sleeve and the piston are all detachable, the machining difficulty is low, when a certain part is damaged, only the corresponding part needs to be replaced, overall scrapping is not needed, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machine accessories, and specifically relates to a transmission shaft for an injection molding machine. Background Technique

[0002] When an injection molding machine is injecting, molten raw materials are injected into a mold through an injection pipe. The mold includes a fixed mold and a movable mold. The fixed mold is fixed on a fixed mold mounting seat, and an injection pipe is installed on the fixed mold mounting seat. The discharging end of the injection pipe is inserted into the fixed mold. The movable mold is fixed on a movable mold mounting, the fixed mold mounting seat remains stationary, and the movable mold mounting moves towards the fixed mold mounting seat to close the fixed mold and the movable mold. Then, a pressing rod presses the molten plastic, and the molten plastic is injected into the fixed mold and the movable mold through the injection pipe. In this process, the pressing rod needs to be connected to a power device through a transmission shaft.

[0003] Most of the current transmission shafts are integral, with high processing difficulty. After being damaged, they need to be scrapped as a whole, resulting in high maintenance costs. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a transmission shaft for an injection molding machine to solve the problems mentioned in the above background technique.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] A transmission shaft for an injection molding machine includes a transmission head. One end of the transmission head is provided with a first internal spline, and the other end is spline-connected to a transmission shaft. One end of the transmission shaft is fixedly connected to a connection head. The end of the connection head far from the transmission shaft is spline-connected to a driving rod. A sleeve is threadedly connected to the driving rod. The end of the sleeve far from the connection head is threadedly connected to a conical piston. A plurality of sliding grooves are provided on the outer wall of the sleeve. The sleeve needs to be movably installed in the injection pipe, and a sliding block is provided on the inner wall of the injection pipe. The sliding block is slidably connected to the sliding groove.

[0007] Preferably, the end of the transmission head far from the first internal spline is provided with a second internal spline. The outer wall of one end of the transmission shaft is provided with a first external spline. The transmission shaft is connected to the transmission head through the cooperation of the first external spline and the second internal spline.

[0008] Preferably, a third internal spline is provided in the connection head. The outer wall of the driving rod is provided with a second external spline. The connection head is connected to the driving rod through the cooperation of the third internal spline and the second external spline.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The transmission head, the transmission shaft, the driving rod, the sleeve and the piston are all detachable, with low processing difficulty. Moreover, when a certain component is damaged, only the corresponding component needs to be replaced, without the need to scrap the whole, reducing the maintenance cost. Description of the Drawings

[0011] Figure 1 Schematic diagram of the present utility model;

[0012] Figure 2 Cross-sectional view after the present utility model is connected to an injection molding pipe;

[0013] In the figure: 1 - driving head, 2 - first internal spline, 3 - transmission shaft, 4 - connecting head, 5 - driving rod, 6 - sleeve, 7 - piston, 8 - sliding groove, 9 - second internal spline, 10 - first external spline, 11 - third internal spline, 12 - second external spline, 13 - injection molding pipe, 14 - slider, 15 - feed pipe. Specific embodiments

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0015] Please refer to Figure 1-2 , a transmission shaft for an injection molding machine, including a driving head 1. One end of the driving head 1 is provided with a first internal spline 2, and a power device is connected through the first internal spline 2. The other end of the driving head 1 is provided with a second internal spline 9. The outer wall of one end of the transmission shaft 3 is provided with a first external spline 10, and the transmission shaft 3 is connected to the driving head 1 through the cooperation of the first external spline 10 and the second internal spline 9.

[0016] One end of the transmission shaft 3 is fixedly connected with a connecting head 4. The end of the connecting head 4 far from the transmission shaft is provided with a third internal spline 11. The outer wall of the driving rod 5 is provided with a second external spline 12. The connecting head 4 is connected to the driving rod 5 through the cooperation of the third internal spline 11 and the second external spline 12.

[0017] The driving rod 5 is threadedly connected with a sleeve 6. One end of the sleeve 6 far from the connecting head is threadedly connected with a conical piston 7. The outer wall of the sleeve 6 is provided with a plurality of sliding grooves 8.

[0018] As Figure 2 shown, the sleeve 6 is located inside the injection molding pipe 13. The inner wall of the injection molding pipe 13 is provided with a plurality of sliders 14. The sliders 14 are slidably connected to the sliding grooves 8 of the sleeve. The injection molding pipe 13 is fixed on the injection molding machine. The injection molding pipe 13 is provided with a feed pipe 15. The molten plastic enters the injection molding pipe 13 through the feed pipe 15.

[0019] The working principle of the present utility model is:

[0020] The first internal spline 2 on the drive head 1 is used to connect with the power device. The drive head 1 is driven to rotate by the power device. The drive head 1 drives the transmission shaft 3 to rotate, and the transmission shaft 3 drives the drive rod 5 to rotate. Since the drive rod 5 is threadedly connected to the sleeve 6, and the sleeve 6 is slidably connected to the slider 14 on the inner wall of the injection pipe through the chute 8, the sleeve 6 will be driven to move forward during the rotation of the drive rod 5, so as to extrude the molten plastic through the piston 7, thereby completing the injection molding work.

[0021] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0022] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transmission shaft for an injection molding machine, characterized in that: The invention comprises a transmission head (1), one end of the transmission head (1) is provided with a first internal spline (2), the other end is spline-connected to a transmission shaft (3), one end of the transmission shaft (3) is fixedly connected to a connecting head (4), an end of the connecting head (4) away from the transmission shaft is spline-connected to a driving rod (5), a sleeve (6) is threadedly connected to the driving rod (5), an end of the sleeve (6) away from the connecting head is threadedly connected to a conical piston (7), and a plurality of sliding grooves (8) are provided on the outer wall of the sleeve (6).

2. The drive shaft for an injection molding machine according to claim 1, characterized in that: The transmission head (1) is provided with a second internal spline (9) at one end away from the first internal spline, and the outer wall of one end of the transmission shaft (3) is provided with a first external spline (10). The transmission shaft (3) is connected to the transmission head (1) through the cooperation between the first external spline (10) and the second internal spline (9).

3. A drive shaft for an injection molding machine according to claim 2, characterized in that: The connecting head (4) is provided with a third internal spline (11), the outer wall of the driving rod (5) is provided with a second external spline (12), and the connecting head (4) is connected to the driving rod (5) through the cooperation between the third internal spline (11) and the second external spline (12).

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