Double-cylinder rodless cavity oil injection cylinder shooting platform

Abstract

The application provides a double-cylinder rodless cavity injection oil cylinder injection platform, which comprises an injection base, an injection head plate and an injection two-plate are installed on the injection base, two injection oil cylinders are installed on the injection two-plate, each injection oil cylinder contains an injection piston and an injection piston rod, rodless cavities and rod cavities are distributed on both sides of the injection piston, an oil motor is installed in the gap between the two injection oil cylinders, the injection piston rod of the injection oil cylinder is connected with an injection plate, the end of the injection plate is connected with a screw rod of a screw rod barrel, and a transmission shaft, a transmission telescopic shaft and a transmission telescopic sleeve are sequentially connected between the screw rod and the oil motor. The double-cylinder rodless cavity injection oil cylinder injection platform provided by the application can improve the injection pressure of the same specification injection molding machine, can significantly improve the fullness and product density of plastic products, and can significantly improve the appearance and quality of products; the injection speed is fast, the brake is sensitive, and the inertia is small, so that the injection precision adjustment and stable control can be significantly improved.

Description

Technical Field

[0001] This application relates to the field of injection molding machine injection mechanism technology, specifically to a double-cylinder rodless cavity injection cylinder injection stage. Background Technology

[0002] In most existing injection molding machines, the injection cylinder is designed on the injection head plate, with the rod-side chamber serving as the injection chamber and the rodless chamber as the ejection (or release) chamber. This structure presents several unresolved problems:

[0003] For the same action pressure data, because the pressure in the rodless chamber is greater than the pressure in the rod chamber, the injection retraction pressure is greater than the injection pressure. However, injection molding machine users urgently want the injection pressure to be much greater than the injection retraction pressure, and the performance requirements for injection are more prominent than those for injection retraction. The two are exactly opposite.

[0004] The heating coil is located right next to the screw barrel in the injection cylinder, so the oil seal of the injection cylinder is more prone to aging, cracking, and oil leakage compared to the oil seals of other cylinders.

[0005] The two injection plates drag the oil motor and its own weight together to perform the injection action. Due to the heavy weight, the injection inertia is large, resulting in slow injection speed and low injection control sensitivity.

[0006] Because the injection piston rod bears the high-intensity injection load, the threaded connection between the piston rod and the large nut is prone to fatigue fracture. Simply thickening the piston rod would reduce the injection pressure, so thickening is generally not recommended. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] The problem to be solved by this application is to provide a double-cylinder rodless cavity injection cylinder injection stage to overcome the defects of low injection pressure, low precision, low production efficiency and short service life of injection piston rod, screw and barrel in the prior art.

[0009] (II) Technical Solution

[0010] The embodiments in this specification provide the following technical solutions:

[0011] This specification provides a dual-cylinder rodless chamber injection cylinder injection station, including an injection base. An injection head plate and a second injection plate are mounted on the injection base. Two injection cylinders are mounted on the second injection plate. Each injection cylinder contains an injection piston and an injection piston rod, which are tightly connected. The fluid-filled area between the injection piston and the injection piston rod within the injection cylinder is called the rod chamber. The other side of the rod chamber within the injection cylinder, lacking an injection piston rod, is called the rodless chamber. Therefore, each injection cylinder includes both a rodless chamber and a rod chamber. A hydraulic motor is installed between the two injection cylinders. The injection piston rod is connected to... The device is equipped with an injection plate, one end of which is connected to the screw of the screw barrel. A drive shaft, a drive telescopic shaft, and a drive telescopic sleeve are sequentially connected between the screw and the hydraulic motor. During injection, the hydraulic pump supplies oil to the rodless chamber, and the injection piston rod pushes the injection plate and the screw of the screw barrel to inject the glue. During ejection, the hydraulic pump supplies oil to the rod chamber, and the injection piston rod pulls the injection plate and the screw of the screw barrel to eject the glue. During material storage, the hydraulic pump supplies oil to the hydraulic motor, which rotates, sequentially driving the drive telescopic sleeve, the drive telescopic shaft, and the drive shaft to rotate, ultimately driving the screw of the screw barrel to store material.

[0012] In some embodiments, each injection cylinder has an injection piston, with rodless chamber and rod chamber connected to both sides of the injection piston. The oil pump power is connected to the rodless chamber through the injection inlet pipe, which is located at the rear end of the injection cylinder. The injection return pipe is connected to the rod chamber, and the injection return pipe is located at the front end of the injection cylinder. The injection piston is connected to the injection piston rod.

[0013] In some embodiments, an injection head plate is installed at the front end of the injection base, the screw barrel is installed on the injection head plate, one end of the hydraulic motor is connected to a transmission telescopic sleeve, the transmission telescopic sleeve is connected to a transmission telescopic shaft, the transmission telescopic shaft is connected to a transmission shaft, the transmission shaft is connected to the screw of the screw barrel, and the transmission telescopic sleeve is connected to the transmission telescopic shaft via a flat key.

[0014] In some embodiments, an electronic scale for injection is mounted on one side of the injection base located on the injection cylinder. The end of the electronic scale is connected to the injection plate. The bottom support of the injection base is mounted on a slide rail. A seat cylinder is provided on one side of the injection base.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0017] 1. With the same system pressure and the same injection cylinder size, the injection pressure of the rodless chamber can be increased by about 20% compared with the injection pressure of the rod chamber. This can significantly improve the fullness and density of plastic products, as well as significantly improve the appearance and quality of the products.

[0018] 2. The injection cylinder is located far from the heating system of the screw barrel, making the oil seal and dust seal of the injection cylinder more durable, the oil temperature environment lower, the machine's injection hydraulic system more user-friendly, and the injection repeatability higher.

[0019] 3. The injection piston rod pushes the injection plate, which in turn pushes the screw forward to inject the glue. This is significantly lighter than a conventional injection molding machine. The injection mechanism has low inertia, resulting in faster injection speed and more responsive braking. It also allows for more precise injection position switching, which is very helpful for the accurate adjustment and stable control of the demanding appearance of complex products.

[0020] 4. The resistance to the screw moving backward during material storage is only the slight frictional resistance between the transmission telescopic shaft and the transmission telescopic sleeve. This is significantly less than the self-weight of the standard machine's injection platen, the self-weight of the hydraulic motor, and the frictional resistance between the injection platen and the injection table slide rail. Therefore, the material storage speed is faster, the production efficiency is higher, and the screw barrel is more durable.

[0021] 5. The piston rod bears the thrust during the injection action. The stress concentration part of the piston rod thread is much smaller than that of the piston rod under tension in a conventional injection molding machine, so the injection piston rod is more durable. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view in this application;

[0024] Figure 2 This is a three-dimensional view of the internal structure in this application.

[0025] The component names corresponding to the various labels in the attached figures are: 1. Injection base; 2. Injection cylinder; 3. Rodless chamber; 4. Rod chamber; 5. Hydraulic motor; 6. Injection piston rod; 7. Injection plate; 8. Screw barrel; 9. Injection oil inlet pipe; 10. Injection oil return pipe; 11. Injection piston; 12. Injection head plate; 13. Transmission telescopic sleeve; 14. Transmission telescopic shaft; 15. Flat key; 16. Injection electronic scale; 17. Slide rail; 18. Seat cylinder; 19. Transmission shaft. Detailed Implementation

[0026] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0027] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0031] Combination Figures 1-2As shown, this application provides a dual-cylinder rodless cavity injection cylinder injection station, including an injection base 1, an injection head plate 12 and an injection plate 2 mounted on the injection base 1, and two injection cylinders 2 on the injection plate 2. Each injection cylinder 2 includes a rodless cavity 3 and a rod cavity 4. A hydraulic motor 5 is installed between the two injection cylinders 2. The injection piston 11 has the rodless cavity 3 and the rod cavity 4 on both sides. The injection piston 11 is connected to an injection piston rod 6. An injection plate 7 is connected to the injection piston rod 6. One end of the injection plate 7 is connected to the screw of a screw barrel 8. The hydraulic motor 5 and the screw of the screw barrel 8 are connected sequentially. The system is connected by a transmission telescopic sleeve 13, a transmission telescopic shaft 14, and a transmission shaft 19. During injection, the oil pump supplies oil to the rodless chamber 3, and the injection piston 11 pushes the injection plate 7 and the screw of the screw barrel 8 through the injection piston rod 6 to inject the glue. During ejection, the oil pump supplies oil to the rod chamber 4, and the injection piston 11 pulls the injection plate 7 and the screw of the screw barrel 8 through the injection piston rod 6 to eject the glue. During material storage, the oil pump supplies oil to the oil motor 5, and the oil motor rotates, which in turn drives the transmission telescopic sleeve 13, the transmission telescopic shaft 14, and the transmission shaft 19 to rotate in sequence, and finally drives the screw of the screw barrel 8 to store material.

[0032] In some embodiments, such as Figure 1 and Figure 2As shown, the injection inlet pipe 9 is located at the rear end of the injection cylinder 2, and the injection return pipe 10 is located at the front end of the injection cylinder 2. The oil pump power supplies oil to the rodless chamber 3 of the injection cylinder 2 through the injection inlet pipe 9, and the return oil from the rod chamber 4 is returned through the injection return pipe 10 to realize the injection action; the oil pump power supplies oil to the rod chamber 4 of the injection cylinder 2 through the injection return pipe 10, and the return oil from the rodless chamber 3 is returned through the injection inlet pipe 9 to realize the ejection action. In this embodiment, an injection head plate 12 is installed at the front end of the injection base 1, and a screw barrel 8 is installed on the injection head plate 12. The hydraulic motor 5 is sequentially connected to a transmission telescopic sleeve 13, a transmission telescopic shaft 14, and a transmission shaft 19, and finally connected to the screw of the screw barrel 8. The transmission telescopic sleeve 13 is connected to the transmission telescopic shaft 14 through a flat key 15. When storing material, the hydraulic motor 5 rotates, which drives the transmission telescopic sleeve 13 to rotate. The rotation of the transmission telescopic sleeve 13 drives the transmission telescopic shaft 14 to rotate through the flat key 15. The rotation of the transmission telescopic shaft 14 drives the transmission shaft 19 to rotate. The rotation of the transmission shaft 19 drives the screw of the screw barrel 8 to rotate, thereby completing the material storage action. When the screw of the screw barrel 8 is in operation, it rotates and moves backward by the plastic back thrust. At this time, the screw of the screw barrel 8 pushes the drive shaft 19, the drive shaft 19 pushes the drive telescopic shaft 14, and the drive telescopic shaft 14 moves backward freely in the drive telescopic sleeve 13. An injection electronic ruler 16 is installed on one side of the injection cylinder 2. The end of the injection electronic ruler 16 is connected to the injection plate 7. The relative distance of the injection plate 7 during injection can be measured by the injection electronic ruler 16. The bottom support of the injection base 1 is installed on the slide rail 17. A seat-in cylinder 18 is provided on one side of the injection base 1. The seat-in cylinder 18 can drive the entire injection base 1 to move forward and backward along the slide rail 17.

[0033] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A double-cylinder rodless cavity injection cylinder injection platform, comprising an injection base (1), wherein an injection head plate (12) and an injection plate are mounted on the injection base (1), and two injection cylinders (2) are mounted on the injection plate, characterized in that, Each injection cylinder (2) contains an injection piston (11) and an injection piston rod (6). The injection piston (11) is connected to the injection piston rod (6). The filling area between the injection piston (11) and the injection piston rod (6) forms a rod chamber (4). A rodless chamber (3) is provided on the other side of the rod chamber (4) in the injection cylinder (2). An oil motor (5) is installed in the gap between the two injection cylinders (2). An injection plate (7) is connected to the injection piston rod (6). One end of the injection plate (7) is connected to the screw of the screw barrel (8). A transmission telescopic sleeve is sequentially connected between the oil motor (5) and the screw of the screw barrel (8). 13) Transmission telescopic shaft (14) and transmission shaft (19); During injection, the external oil pump supplies oil to the rodless chamber (3), and the injection piston rod (6) pushes the injection plate (7) and the screw of the screw barrel (8) to inject the glue; During ejection, the external oil pump supplies oil to the rod chamber (4), and the injection piston rod (6) pulls the injection plate (7) and the screw of the screw barrel (8) to eject the glue; During storage, the external oil pump supplies oil to the oil motor (5), and the oil motor (5) rotates, which in turn drives the transmission telescopic sleeve (13), transmission telescopic shaft (14) and transmission shaft (19) to rotate, and finally drives the screw of the screw barrel (8) to store the material.

2. The dual-cylinder rodless cavity injection cylinder injection stage according to claim 1, characterized in that, The injection inlet pipe (9) is connected to the rodless chamber (3), and the injection return pipe (10) is connected to the rod chamber (4). The injection inlet pipe (9) is located at the rear end of the injection cylinder (2), and the injection return pipe (10) is located at the front end of the injection cylinder (2).

3. The dual-cylinder rodless cavity injection cylinder injection stage according to claim 1, characterized in that, Each injection cylinder (2) has a rodless chamber (3) and a rod chamber (4). Each injection cylinder (2) is equipped with a glue injection piston (11), which is connected to the glue injection piston rod (6).

4. The dual-cylinder rodless cavity injection cylinder injection stage according to claim 1, characterized in that, The front end of the injection base (1) is equipped with an injection head plate (12), and the screw barrel (8) is installed on the injection head plate (12).

5. The dual-cylinder rodless cavity injection cylinder injection stage according to claim 1, characterized in that, One end of the oil motor (5) is connected to a transmission telescopic sleeve (13), the transmission telescopic sleeve (13) is connected to a transmission telescopic shaft (14), the transmission telescopic shaft (14) is connected to a transmission shaft (19), and the transmission shaft (19) is connected to the screw of the screw barrel (8).

6. The dual-cylinder rodless cavity injection cylinder injection stage according to claim 1, characterized in that, The transmission telescopic sleeve (13) is connected to the transmission telescopic shaft (14) via a flat key (15).

7. The dual-cylinder rodless cavity injection cylinder injection stage according to claim 1, characterized in that, The injection base (1) is located on one side of the injection cylinder (2) and an injection electronic ruler (16) is installed thereon. The end of the injection electronic ruler (16) is connected to the injection plate (7).

8. The dual-cylinder rodless cavity injection cylinder injection stage according to claim 1, characterized in that, The bottom support of the injection base (1) is mounted on the slide rail (17), and a seat inlet cylinder (18) is provided on one side of the injection base (1).

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