A two-stage vertical cylinder structure for injection molding machines

Abstract

This utility model discloses a two-section vertical cylinder structure for an injection molding machine, including a base, an integrated cylinder, and a second hydraulic cylinder. The integrated cylinder includes a base plate, first hydraulic cylinders distributed circumferentially along the axis of the base plate, and first telescopic rods slidably mounted on the first hydraulic cylinders. The base plate and the first hydraulic cylinders are integrally formed, and a positioning seat is provided between adjacent first hydraulic cylinders. The second hydraulic cylinder is mounted on the base and has a second telescopic rod slidably mounted on it. The driving end of the second telescopic rod is connected to the positioning seat, and the driving ends of multiple first telescopic rods are connected to the same driving seat. The multiple first telescopic rods connected to the same driving seat drive its movement, thereby ensuring stable pressure output of the injection molding seat, i.e., the injection molding seat is located on the driving seat.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machines, and in particular to a two-stage vertical cylinder structure for injection molding machines. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.

[0003] In existing injection molds, the two-stage cooperation between the upper and lower molds is mainly achieved. However, the two-stage output of the hydraulic cylinder is also one of the key aspects of plastic molding. Currently, the two-stage adjustment is mainly achieved by adjusting the hydraulic output pressure. However, in actual output, the two-stage plastic output pressure is mainly adjusted by adjusting the hydraulic pressure through time intervals. The corresponding plastic pressure is adjusted linearly, not in a two-stage manner (for example, the first stage pressure is 500N, and the second stage pressure is 100N). The first stage pressure is used to achieve high-pressure plastic fluid injection, and the second stage is used to fill the plastic fluid grooves to ensure complete filling of the pressure inside the plastic fluid.

[0004] Therefore, achieving two-stage pressure is the key to the design. Utility Model Content

[0005] The main purpose of this invention is to propose a two-stage vertical cylinder structure for injection molding machines, which aims to improve the existing hydraulic cylinder structure and achieve two-stage hydraulic pressure. At the same time, its structure is compact and stable, and it can ensure a clear dividing line between the two stages of pressure, thereby improving the injection pressure.

[0006] To achieve the above objectives, this utility model proposes a two-section vertical cylinder structure for injection molding machines, comprising:

[0007] Base

[0008] An integrated cylinder includes a base plate, a first hydraulic cylinder circumferentially distributed along the axis of the base plate, and a first telescopic rod slidably mounted on the first hydraulic cylinder; the base plate and the first hydraulic cylinder are integrally formed.

[0009] A positioning seat is provided between adjacent first hydraulic cylinders;

[0010] The second hydraulic cylinder is mounted on the base and has a slidably mounted second telescopic rod. The drive end of the second telescopic rod is connected to the positioning seat.

[0011] The drive ends of multiple first telescopic rods are connected to the same drive base.

[0012] In practical high-tonnage hydraulic cylinders, ensuring constant pressure output is a key design challenge. Firstly, the integrated cylinder structure ensures coaxiality and stable pressure output when the second hydraulic cylinder and the second telescopic rod drive the integrated cylinder to move as a whole.

[0013] The other multiple first telescopic rods are connected to the same drive seat and drive it to move, thereby ensuring stable pressure output of the injection molding seat.

[0014] That is, the injection molding seat is located on the drive seat;

[0015] In the actual design, the drive seat is set downwards, thereby realizing the vertical setting of the injection cylinder. The first stage of pressure requires a large pressure, that is, the first telescopic rod moves first. The second stage of pressure is less than the first stage of pressure. Therefore, the second hydraulic cylinder drives the entire base plate to move, thereby realizing the output of the second stage of pressure. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the present utility model. Figure 1 ;

[0017] Figure 2 This is a three-dimensional schematic diagram of the present utility model. Figure 2 ;

[0018] Figure 3 Schematic diagram of a single-piece cylinder;

[0019] Figure 4 This is a schematic diagram of a single-piece cylinder.

[0020] Figure 5 This is a partial schematic diagram of the present invention installed in an injection molding machine.

[0021] In the picture,

[0022] 1 is the base.

[0023] 2 is a single-piece cylinder, 20 is a base plate, 21 is the first hydraulic cylinder, and 22 is the first telescopic rod.

[0024] 31 is the second hydraulic cylinder, and 32 is the second telescopic rod.

[0025] 41 is the positioning seat, and 42 is the drive seat.

[0026] 51 is the hydraulic input port, and 52 is the hydraulic output port.

[0027] 61 is the guide rod, and 62 is the guide sleeve.

[0028] 7 is an extension block, and 71 is a positioning hole.

[0029] 8 is the connector. Detailed Implementation

[0030] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0031] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] like Figures 1 to 5 As shown, a two-stage vertical cylinder structure for an injection molding machine includes:

[0034] Base 1,

[0035] The integrated cylinder 2 includes a base plate 20, a first hydraulic cylinder 21 distributed circumferentially along the axis of the base plate 20, and a first telescopic rod slidably mounted on the first hydraulic cylinder 21; the base plate 20 and the first hydraulic cylinder 21 are integrally formed.

[0036] A positioning seat 41 is provided between adjacent first hydraulic cylinders 21;

[0037] The second hydraulic cylinder 31 is mounted on the base 1. The second hydraulic cylinder 31 is equipped with a second telescopic rod that is slidably mounted. The driving end of the second telescopic rod is connected to the positioning seat 41.

[0038] The drive ends of multiple first telescopic rods are connected to the same drive seat 42.

[0039] In practical high-tonnage hydraulic cylinders, ensuring constant pressure output is a key design challenge. Firstly, the integrated cylinder 2 structure ensures coaxiality and stable pressure output when the second hydraulic cylinder 31 and the second telescopic rod 32 drive the integrated cylinder 2 to move as a whole.

[0040] The other multiple first telescopic rods are connected to the same drive seat 42 and drive it to move, thereby ensuring stable pressure output of the injection molding seat.

[0041] That is, the injection molding seat is located on the drive seat 42;

[0042] In the actual design, the drive seat 42 is set downwards, thereby realizing the vertical setting of the injection cylinder. The first stage of pressure requires a large pressure, that is, the first telescopic rod moves first. The second stage of pressure is less than the first stage of pressure. Therefore, the second hydraulic cylinder 31 drives the base plate 20 to move as a whole, thereby realizing the output of the second stage of pressure.

[0043] Specifically, the substrate 20 and the first hydraulic cylinder 21 are integrally cast.

[0044] In the existing design, in the large tonnage structure, each first hydraulic cylinder 21 is driven by a synchronization structure to drive the drive seat 42 simultaneously. When there is a deviation in the pressure, there will be a pressure deviation between the drive seat 42 and the first telescopic rod 22, which will cause pressure to appear between the drive seat 42 or the adjacent first hydraulic cylinder 21, resulting in wear or deviation, affecting the control accuracy and the service life of the injection molding machine.

[0045] In this embodiment of the utility model, the first hydraulic cylinder 21 is integrally recessed on the base plate 20, that is, the integral cylinder 2 structure, and the hydraulic output port and hydraulic output port are subsequently processed to drive the sliding of the first telescopic rod 22.

[0046] Specifically, the first hydraulic cylinder 21 is provided with a hydraulic input port 51 and a hydraulic output port 52 that penetrate the base plate 20 (integratedly cast with the integrated cylinder 2, with a valve structure to be determined later), and its two ends are respectively connected to the hydraulic output device and the recovery port, thereby increasing the predetermined hydraulic pressure.

[0047] In this embodiment of the utility model, four first hydraulic cylinders 21 are provided, and a guide sleeve is provided between adjacent first hydraulic cylinders 21 at the positioning seat 41. The base 1 is provided with a guide rod, and the guide rod cooperates with the guide sleeve.

[0048] Specifically, four guide sleeves are provided.

[0049] In this embodiment of the utility model, the positioning seat 41 is an extension block that extends outward between the two first hydraulic cylinders 21. There are two extension blocks that are spaced apart, thereby forming a clearance space between the two extension blocks, which facilitates the installation of the second telescopic rod 32 and the guide rod.

[0050] Specifically, the extension block located at one end of the opening of the first hydraulic cylinder 21 is provided with an outwardly extending positioning hole, which is used to install the drive end of the second telescopic rod 32.

[0051] In this embodiment of the utility model, the drive seat 42 is provided with a connecting seat in the middle for connecting with the injection molding seat.

[0052] Specifically, the middle part between the cylinder walls of the four first hydraulic cylinders 21 is a hollow structure, that is, the cylinder walls of adjacent first hydraulic cylinders 21 are integrally formed by using arc-shaped transition side walls. The hollow structure can reduce the load on the second hydraulic cylinder 31 and improve the output stability of the second stage pressure.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A two-stage vertical cylinder structure for an injection molding machine, characterized in that, include: Base An integrated cylinder includes a base plate, a first hydraulic cylinder circumferentially distributed along the axis of the base plate, and a first telescopic rod slidably mounted on the first hydraulic cylinder; the base plate and the first hydraulic cylinder are integrally formed. A positioning seat is provided between adjacent first hydraulic cylinders; The second hydraulic cylinder is mounted on the base and has a slidably mounted second telescopic rod. The drive end of the second telescopic rod is connected to the positioning seat. The drive ends of multiple first telescopic rods are connected to the same drive base.

2. The two-section vertical cylinder structure for injection molding machines as described in claim 1, characterized in that: The substrate and the first hydraulic cylinder are integrally cast.

3. The two-section vertical cylinder structure for injection molding machines as described in claim 1, characterized in that: The first hydraulic cylinder is integrally recessed on the base plate.

4. The two-section vertical cylinder structure for injection molding machines as described in claim 1, characterized in that: The first hydraulic cylinder is provided with a hydraulic input port and a hydraulic output port that penetrate the substrate.

5. The two-section vertical cylinder structure for injection molding machines as described in claim 1, characterized in that: The first hydraulic cylinder is provided in four parts, and a guide sleeve is provided between adjacent first hydraulic cylinders at the positioning seat. The base is provided with a guide rod, which cooperates with the guide sleeve.

6. The two-section vertical cylinder structure for an injection molding machine as described in claim 5, characterized in that: The guide sleeve has four parts.

7. The two-section vertical cylinder structure for an injection molding machine as described in claim 5, characterized in that: The positioning seat is an extension block that extends outward between the two first hydraulic cylinders, and there are two extension blocks that are spaced apart.

8. The two-section vertical cylinder structure for an injection molding machine as described in claim 7, characterized in that: The extension block located at one end of the opening of the first hydraulic cylinder is provided with an outwardly extending positioning hole, which is used to install the drive end of the second telescopic rod.

9. The two-section vertical cylinder structure for an injection molding machine as described in claim 1, characterized in that: A connecting seat is provided in the middle of the drive seat.

10. The two-section vertical cylinder structure for an injection molding machine as described in claim 1, characterized in that: The middle section between the cylinder walls of the four first hydraulic cylinders is a hollow structure.

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