Oil cylinder for hot runner casting

Abstract

The utility model relates to an oil cylinder for a hot runner casting, which belongs to the technical field of hot runners and comprises an upper mold and a lower mold, the upper mold is matched with the lower mold, a sealing cover is arranged at the top of the upper mold, a spring is fixedly connected to the bottom of the sealing cover, one end of the spring is fixedly connected with a sliding plate, and the other end of the spring is fixedly connected with the sliding plate. And the sliding plate is attached to the inner wall of the cavity of the upper mold, the top of the sliding plate is fixedly connected with a limiting pipe, the top of the sealing cover is rotationally connected with a threaded rod, and the top of the threaded rod is fixedly connected with a handle. When casting is needed, a threaded pipe drives a connecting plate and a quantitative rod to ascend during rotation, so that the allowance, needing to be reserved, of the casting is limited, materials for the casting enter through a feeding port, and during continuous feeding, the materials or a sliding plate is pushed, so that the sliding plate moves upwards; and enough allowance is reserved for the casting through upward movement of the sliding plate, so that follow-up finish machining is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner, and relates to an oil cylinder for a hot runner casting. Background Art

[0002] In injection mold technology, the hot runner system is highly favored because it can significantly improve production efficiency and product quality. The hot runner system keeps the plastic in the runner and gate in a molten state, reducing waste and downtime during the injection process, and is one of the key technologies in modern plastic product production;

[0003] The oil cylinder on the hot runner system is a common component in the hot runner, used to control the opening and closing of the valve pin to ensure the plastic flow and temperature control in the hot runner system. As one of the most important accessories of the oil cylinder, the cost of the cylinder block accounts for the highest proportion of the entire oil cylinder. Currently, the hot runner oil cylinders are basically machined from raw material steel by lathe + CNC machine, which is time-consuming and material-consuming, resulting in a high production cost of the cylinder block;

[0004] To solve the above problems, an oil cylinder for a hot runner casting is proposed in this application. Content of the Utility Model

[0005] The utility model aims at the technical problems existing in the prior art and provides an oil cylinder for a hot runner casting.

[0006] The technical solution for the utility model to solve the above technical problems is as follows: An oil cylinder for a hot runner casting includes an upper mold and a lower mold, the upper mold and the lower mold are adapted to each other, a sealing cover is arranged at the top of the upper mold, a spring is fixedly connected to the bottom of the sealing cover, one end of the spring is fixedly connected to a sliding plate, the sliding plate is in fit with the inner wall of the cavity of the upper mold, a limiting tube is fixedly connected to the top of the sliding plate, a threaded rod is rotatably connected to the top of the sealing cover, a handle is fixedly connected to the top of the threaded rod, a threaded tube is threadedly connected to the outer wall of the threaded rod, a connecting plate is arranged on the outer wall of the threaded tube, the bottom of the connecting plate is in fit with the top of the sealing cover, a quantitative rod is fixedly connected to the bottom of the connecting plate, the quantitative rod is slidably connected to the sealing cover, and the outer wall of the quantitative rod is in fit with the inner wall of the limiting tube.

[0007] A fixing plate is fixedly connected to the outer wall of the sealing cover, the bottom of the fixing plate is in fit with the top of the upper mold, a bolt is movably connected to the fixing plate, a threaded groove is opened at the top of the upper mold, and the threaded groove opened in the upper mold is threadedly connected to the bolt. By setting the fixing plate, the bolt and the threaded groove, the disassembly and installation of the sealing cover and its related components are realized, so as to avoid affecting the subsequent casting effect.

[0008] A sealing ring is fixedly connected to the bottom of the sealing cover, and the sealing ring is slidably connected to the top of the upper mold. By providing the sealing ring, the space above the sliding plate is sealed, thereby preventing heat loss through loose connections and affecting the casting effect.

[0009] A heating wire is fixedly connected to the top of the sliding plate. By providing the heating wire, the sliding plate is heated to provide a stable reference for subsequent machining.

[0010] A connecting groove is formed in the top of the sliding plate, and a collecting groove is formed in the sliding plate through the connecting groove. By providing the connecting groove and the collecting groove, the casting material is collected to prevent the material from affecting the use of other components.

[0011] A positioning groove is formed in the inner wall of the limiting tube, a positioning block is fixedly connected to the bottom of the quantitative rod, and the outer wall of the positioning block fits with the positioning groove formed in the limiting tube. By providing the positioning groove and the positioning block, the sliding plate is limited to prevent the spring from being severely damaged.

[0012] The beneficial effects of the present utility model are as follows:

[0013] When casting is required, by rotating, the threaded tube drives the connecting plate and the quantitative rod to rise, thereby restricting the allowance to be reserved for casting. The casting material enters through the feed port, and during continuous feeding, the material may push the sliding plate, causing the sliding plate to move upward. The upward movement of the sliding plate leaves enough allowance for the casting, facilitating subsequent finishing.

[0014] By providing the fixing plate, bolts, and threaded grooves, the disassembly and installation of the sealing cover and its related components are realized. When the sliding plate slides for a long time, casting material may adhere to the upper part of the sliding plate, and the adhesion of the material may affect the subsequent casting effect. By the cooperation of the bolts and the threaded grooves, the sealing cover is disassembled to facilitate the cleaning of the sealing cover and its related components, thereby preventing the impact on the subsequent casting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram showing the overall structure of the present utility model;

[0016] Figure 2 This is a schematic diagram showing the structure of the sliding plate and its related parts of the present utility model;

[0017] Figure 3 This is a schematic diagram showing the structure of the spring and its related parts of the present utility model;

[0018] Figure 4 This is a schematic diagram showing the structure of the connecting groove and its related parts of the present utility model.

[0019] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0020] 1. Upper die; 2. Sealing cover; 3. Spring; 4. Sliding plate; 5. Limit tube; 6. Connecting plate; 7. Threaded tube; 8. Threaded rod; 9. Quantitative rod; 10. Handle; 11. Fixed plate; 12. Bolt; 13. Threaded groove; 14. Sealing ring; 15. Heating wire; 16. Connecting groove; 17. Collection groove; 18. Positioning groove; 19. Positioning block; 20. Lower die. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0022] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0023] In the description of the present application, the term "for example" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "for example" in the present application is not necessarily construed as being more preferred or having more advantages than other embodiments. In order to enable any person skilled in the art to implement and use the present invention, the following description is given. In the following description, details are set forth for the purpose of explanation. It should be understood that those skilled in the art can realize that the present invention can also be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid unnecessary details from obscuring the description of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the present application.

[0024] Refer to Figures 1 - 3, An oil cylinder for a hot runner casting, including an upper mold 1 and a lower mold 20. The upper mold 1 and the lower mold 20 are adapted to each other. There is a cavity inside the upper mold 1 and the lower mold 20, and the size of the cavity is relatively larger than the required casting. By reserving a larger space, sufficient allowance for the casting process is achieved, thus facilitating subsequent finishing. A sealing cover 2 is arranged on the top of the upper mold 1. The sealing cover 2 is used to seal the top of the upper mold 1. A spring 3 is fixedly connected to the bottom of the sealing cover 2. One end of the spring 3 is fixedly connected to a sliding plate 4. The spring 3 is used to realize the expansion and contraction of the sliding plate 4. The sliding plate 4 is used to limit the allowance. When it is necessary to reserve the allowance, it can be completed by the contraction of the sliding plate 4. The sliding plate 4 fits with the inner wall of the cavity of the upper mold 1. A limiting tube 5 is fixedly connected to the top of the sliding plate 4. A threaded rod 8 is rotatably connected to the top of the sealing cover 2. A handle 10 is fixedly connected to the top of the threaded rod 8. The handle 10 is used to facilitate the staff to rotate the threaded rod 8. A threaded tube 7 is threadedly connected to the outer wall of the threaded rod 8. The rotation of the threaded rod 8 can realize the rotation of the threaded tube 7. A connecting plate 6 is arranged on the outer wall of the threaded tube 7. The rotation of the threaded tube 7 can drive the movement of the connecting plate 6. The bottom of the connecting plate 6 fits with the top of the sealing cover 2. A quantitative rod 9 is fixedly connected to the bottom of the connecting plate 6. The movement of the connecting plate 6 can realize the adjustment of the position of the quantitative rod 9. By adjusting the position of the quantitative rod 9, the reserved allowance is restricted. The quantitative rod 9 is slidably connected to the sealing cover 2, and the outer wall of the quantitative rod 9 fits with the inner wall of the limiting tube 5.

[0025] Refer to Figure 1 and Figure 2 , A fixing plate 11 is fixedly connected to the outer wall of the sealing cover 2. The bottom of the fixing plate 11 fits with the top of the upper mold 1. A bolt 12 is movably connected to the fixing plate 11. A threaded groove 13 is opened on the top of the upper mold 1. The threaded groove 13 opened on the upper mold 1 is threadedly connected to the bolt 12. The threaded groove 13 is used to connect the bolt 12 to the upper mold 1. By connecting the sealing cover 2 to the upper mold 1, the bolt 12 can fix the fixing plate 11, avoiding the situation of the fixing plate 11 shaking, thus realizing the fixing and disassembly of the sealing cover 2.

[0026] Refer to Figure 3 , A sealing ring 14 is fixedly connected to the bottom of the sealing cover 2. The sealing ring 14 is slidably connected to the top of the upper mold 1. The sealing ring 14 is used to seal the space above the sliding plate 4, avoiding the situation of insufficient sealing in the space above the sliding plate 4, thereby avoiding the loss of heat through the loose connection and affecting the casting effect.

[0027] Refer to Figure 3, a heating wire 15 is fixedly connected to the top of the sliding plate 4. The heating wire 15 is used to heat the sliding plate 4. By heating the sliding plate 4 and adjusting its position, the gap between the casting and the die wall can be precisely controlled to provide a stable reference for subsequent machining.

[0028] Refer to Figure 2 and Figure 4 , a connecting groove 16 is formed in the top of the sliding plate 4, and a collecting groove 17 is formed in the sliding plate 4 through the connecting groove 16. The combined use of the connecting groove 16 and the collecting groove 17 can collect the materials for the casting. When the sliding plate 4 is used for a long time, the gradually used materials may flow above the sliding plate 4. The materials flowing above the sliding plate 4 are collected through the connecting groove 16 and the collecting groove 17 to prevent the materials from affecting the use of other components.

[0029] Refer to Figure 3 and Figure 4 , a positioning groove 18 is formed in the inner wall of the limiting tube 5, and a positioning block 19 is fixedly connected to the bottom of the metering rod 9. The outer wall of the positioning block 19 fits with the positioning groove 18 formed in the limiting tube 5. The combined use of the positioning groove 18 and the positioning block 19 can limit the sliding plate 4, preventing the sliding plate 4 from being pulled by the casting and affecting the spring 3 when the casting is taken out, thus avoiding significant damage to the spring 3.

[0030] Working principle:

[0031] For this hot runner casting oil cylinder, when a casting is required, the operator rotates the threaded rod 8 through the handle 10. The rotation of the threaded rod 8 drives the threaded tube 7 to rotate, causing the connecting plate 6 to move. The movement of the connecting plate 6 drives the metering rod 9 to move. After the metering rod 9 moves to the required position, the casting material is fed into the cavity of the mold through the feed port of the mold. During the feeding process of the casting material, the continuous feeding pushes the sliding plate 4, causing the sliding plate 4 to move under the contraction of the spring 3. When one side of the sliding plate 4 touches the metering rod 9, the feeding stops, and the casting is completed. After the casting is completed, the operator removes the excess allowance through precision machining according to the requirements to complete the production of the oil cylinder. During the long-term use of the mold, the operator can disassemble the relevant components by removing the bolts 12 to facilitate the cleaning of the relevant components and prevent them from affecting subsequent castings.

[0032] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic inventive concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0033] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. An oil cylinder for a hot runner casting, comprising an upper mold (1) and a lower mold (20), characterized in that, The upper mold (1) and the lower mold (20) are adapted to each other. A sealing cover (2) is provided at the top of the upper mold (1). A spring (3) is fixedly connected to the bottom of the sealing cover (2). One end of the spring (3) is fixedly connected to a sliding plate (4). The sliding plate (4) is in contact with the inner wall of the cavity of the upper mold (1). A limiting tube (5) is fixedly connected to the top of the sliding plate (4). A threaded rod (8) is rotatably connected to the top of the sealing cover (2). A handle (10) is fixedly connected to the top of the threaded rod (8). A threaded tube (7) is threadedly connected to the outer wall of the threaded rod (8). A connecting plate (6) is provided on the outer wall of the threaded tube (7). The bottom of the connecting plate (6) is in contact with the top of the sealing cover (2). A quantitative rod (9) is fixedly connected to the bottom of the connecting plate (6). The quantitative rod (9) is slidably connected to the sealing cover (2). The outer wall of the quantitative rod (9) is in contact with the inner wall of the limiting tube (5).

2. The oil cylinder for a hot runner casting according to claim 1, characterized in that, A fixing plate (11) is fixedly connected to the outer wall of the sealing cover (2). The bottom of the fixing plate (11) is in contact with the top of the upper mold (1). A bolt (12) is movably connected to the fixing plate (11). A threaded groove (13) is formed in the top of the upper mold (1). The threaded groove (13) formed in the upper mold (1) is threadedly connected to the bolt (12).

3. The oil cylinder for a hot runner casting according to claim 1, wherein A sealing ring (14) is fixedly connected to the bottom of the sealing cover (2). The sealing ring (14) is slidably connected to the top of the upper mold (1).

4. A hydraulic cylinder for a hot runner casting according to claim 1, characterized in that, A heating wire (15) is fixedly connected to the top of the sliding plate (4).

5. The oil cylinder for a hot runner casting according to claim 1, characterized in that, A connecting groove (16) is formed in the top of the sliding plate (4). A collecting groove (17) is formed in the sliding plate (4) through the connecting groove (16).

6. The oil cylinder for a hot runner casting according to claim 1, wherein A positioning groove (18) is formed in the inner wall of the limiting tube (5). A positioning block (19) is fixedly connected to the bottom of the quantitative rod (9). The outer wall of the positioning block (19) is in contact with the positioning groove (18) formed in the limiting tube (5).

Images