Independent injection pressure-maintaining mechanism of injection molding machine and injection molding machine

Abstract

The utility model discloses an independent injection pressure-maintaining mechanism and an injection molding machine, including a pressure-maintaining assembly, a nozzle, a barrel flange and a barrel, wherein the barrel flange is installed at the front end of the barrel, and the nozzle is installed on the barrel flange; the barrel flange includes a main flow channel, a branch flow channel and a notch, wherein the main flow channel is arranged at the center of the barrel flange and is closed at the flange end, and a plurality of branch flow channels are opened around the flange end to communicate with the main flow channel, and the notch is close to the flange end and communicates with the main flow channel; the pressure-maintaining assembly is located in the main flow channel through the notch and can move axially back and forth, and after the injection is completed, the pressure-maintaining assembly moves along the injection direction and applies pressure to realize the pressure-maintaining action. The independent injection pressure-maintaining mechanism and the injection molding machine separate the injection action and the pressure-maintaining action through a special barrel flange structure, thereby realizing independent injection and pressure-maintaining actions; and effectively solving the problem that a single power unit in the injection molding process is difficult to simultaneously meet the needs of the product for the rapid injection molding process and the long-term high-pressure pressure-maintaining molding process.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to an independent injection pressure-maintaining mechanism of an injection molding machine and an injection molding machine. Background Art

[0002] At present, the power unit and actuator for the injection action and the pressure holding action of the commonly used injection molding machines on the market are the same mechanism. Under normal circumstances, the injection power unit and the actuator will immediately implement the pressure holding action after completing the injection action until the product is formed. However, in many cases, the injection action requires a fast injection speed to fill the mold cavity, which requires the power unit and the actuator to respond quickly, while the pressure holding action requires a long time of high pressure and a very slow injection speed to prevent the product from shrinking and the rubber from flowing back. In other words, the plastic molding processes of the injection process and the pressure holding process are completely different, and it is difficult for the same power unit and actuator to meet two different injection processes at the same time.

[0003] Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0004] In view of the above technical problems, the utility model provides an independent injection and pressure-holding mechanism for an injection molding machine and an injection molding machine, which separates the injection action and the pressure-holding action through a special barrel flange structure to achieve independent injection and pressure-holding actions; and effectively solves the problem that during the injection molding process of the injection molding machine, a single power unit is difficult to simultaneously meet the requirements of both the rapid injection molding process and the long-term high-pressure pressure-holding molding process for the product.

[0005] To achieve the above purpose, the technical solution of the utility model is:

[0006] An independent injection pressure-maintaining mechanism for an injection molding machine comprises a pressure-maintaining assembly, a supporting platform, a nozzle, a barrel flange and a barrel, wherein the barrel flange is mounted on the front end of the barrel, and the nozzle is mounted on the barrel flange; the pressure-maintaining assembly, the nozzle, the barrel flange and the barrel are respectively located on the supporting platform;

[0007] The barrel flange includes a main flow channel, a branch flow channel and a notch. The main flow channel is arranged at the center of the barrel flange and is closed at the flange end. A plurality of branch flow channels are opened around the flange end and communicate with the main flow channel. The notch is close to the flange end and communicates with the main flow channel.

[0008] The pressure-maintaining component is located in the main channel through the notch and can move axially back and forth. After injection is completed, the pressure-maintaining component moves along the injection direction and applies pressure to achieve pressure-maintaining action.

[0009] The above-mentioned independent injection and pressure-holding mechanism of the injection molding machine separates the injection action and the pressure-holding action through the barrel flange with the main channel and the branch channel and the pressure-holding component, thereby realizing independent injection and pressure-holding actions; it effectively solves the problem that during the injection molding process of the injection molding machine, a single power unit is difficult to simultaneously meet the requirements of the rapid injection molding process and the long-term high-pressure pressure-holding molding process of the product.

[0010] In a further optimized solution, the pressure-maintaining assembly is provided with a pressure-maintaining piston rod and a connecting rod, the pressure-maintaining piston rod and the connecting rod pass through the notch and are located in the main flow channel, the outer diameter of the pressure-maintaining piston rod matches the inner diameter of the main flow channel, and the connecting rod is connected to the pressure-maintaining piston rod and drives it to move axially in the main flow channel. The pressure-maintaining assembly with the pressure-maintaining piston rod and the connecting rod has a simple structure and convenient action control.

[0011] Further optimized solution, the pressure-maintaining assembly is provided with a support seat, a pin, a pressure-maintaining actuator and a pressure-maintaining power unit, the support seat is fixed on the barrel flange, the pin is installed on the support seat, the connecting rod is installed on the pin and rotates around the pin, one end of the connecting rod is connected to the pressure-maintaining piston rod, and the other end is connected to the pressure-maintaining actuator, the pressure-maintaining actuator is installed on the pressure-maintaining power unit, and the pressure-maintaining power unit provides power to drive the pressure-maintaining piston rod to move axially. The pressure-maintaining assembly moves independently and can meet the needs of long-term high pressure maintenance.

[0012] An injection molding machine comprises any of the above-mentioned independent injection and pressure-maintaining mechanisms for injection molding machines. The injection molding machine can meet the requirements of rapid response during injection and high pressure and long-term pressurization during pressure-maintaining process.

[0013] According to the further optimization scheme, the injection molding machine also includes a mold clamping power unit, a mold clamping actuator, a mold clamping tail plate, a mold clamping linear rail, a mold clamping tie rod, a mold clamping movable plate, a mold rear plate, a mold front plate and a mold clamping head plate;

[0014] The mold clamping tail plate and the mold clamping head plate are connected to form a mold clamping frame through the mold clamping pull rod and are installed on the supporting platform;

[0015] The mold clamping power unit and the mold clamping actuator are mounted on the mold clamping tail plate, and the mold clamping linear rail is fixed on the supporting platform;

[0016] One end of the mold clamping actuator is connected to the mold clamping movable plate to push the mold clamping movable plate to move horizontally along the mold clamping linear rail. The mold rear plate is fixed on the mold clamping movable plate, and the mold front plate is fixed on the mold clamping head plate.

[0017] The solution discloses the problem of how an injection molding machine can realize mold opening and mold closing.

[0018] According to the further optimization scheme, the injection molding machine also includes an injection screw, a front plate of a shooting platform, a pull rod of a shooting platform, a movable plate of a shooting platform, a tail plate of a shooting platform, an injection actuator, an injection power unit and an injection line rail;

[0019] The shooting platform front plate and the shooting platform tail plate are installed and fixed on the supporting platform through the shooting platform tie rod to form a shooting platform frame; the pressure maintaining assembly is installed on the supporting platform;

[0020] The injection molding actuator and the injection molding power unit are mounted on the tail plate of the injection molding platform, and the injection molding linear rail is fixed on the supporting platform;

[0021] The movable plate of the shooting platform can move horizontally along the injection linear track, the barrel is installed on the front plate of the shooting platform, the injection screw is installed on the movable plate of the shooting platform, and the outer diameter of the injection screw matches the inner diameter of the barrel.

[0022] The scheme discloses the structure and operation process of how the injection molding machine realizes the injection of rubber material.

[0023] Compared with the prior art, the utility model has the following technical advantages: the independent injection and pressure-holding mechanism of the injection molding machine, the injection molding machine and the control method have simple structures and are easy to control. The injection action and the pressure-holding action are separated to realize independent injection and pressure-holding actions, and can simultaneously meet the requirements of rapid response in the injection process and high pressure and long-term pressurization in the pressure-holding process, thereby meeting the needs of specific plastic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of a specific embodiment of the independent injection and pressure-maintaining mechanism of the injection molding machine of the utility model;

[0025] Figure 2 yes Figure 1 The front view of the flange of the middle barrel;

[0026] Figure 3 yes Figure 2 AA section view;

[0027] Figure 4 yes Figure 1 Schematic diagram of the molten rubber entering the barrel;

[0028] Figure 5 yes Figure 1 Schematic diagram of the injection action;

[0029] Figure 6 yes Figure 1 Schematic diagram of the mid-pressure holding action.

[0030] In the figure: supporting platform 1, mold clamping power unit 2, mold clamping actuator 3, mold clamping tail plate 4, mold clamping linear rail 5, mold clamping tie rod 6, mold clamping movable plate 7, mold back plate 8, mold front plate 9, mold clamping head plate 10, nozzle 11, barrel flange 12, barrel 13, injection screw 14, shooting platform front plate 15, shooting platform tie rod 16, shooting platform movable plate 17, shooting platform tail plate 18, injection actuator 19, injection power unit 20, injection linear rail 21, pressure holding piston rod 22, connecting rod 23, support seat 24, pin 25, pressure holding actuator 26, pressure holding power unit 27, molten rubber 28, branch channel 29, main channel 30, notch 31, pressure holding component A. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the embodiments in the accompanying drawings.

[0032] like Figures 1 to 6 As shown, a specific embodiment of the independent injection pressure-maintaining mechanism and injection molding machine of the utility model.

[0033] like Figure 1 As shown, the independent injection pressure-maintaining mechanism of the injection molding machine of this embodiment includes a pressure-maintaining component A, a nozzle 11 , a barrel flange 12 and a barrel 13 . The barrel flange 12 is installed at the front end of the barrel 13 , and the nozzle 11 is installed on the barrel flange 12 .

[0034] like Figure 2 and Figure 3 As shown, the barrel flange 12 includes a main channel 30, a branch channel 29 and a notch 31. The main channel 30 is arranged at the center of the barrel flange 12 and is closed at the flange end. A plurality of branch channels 29 are opened around the flange end and communicate with the main channel 30. The notch 31 is close to the flange end and communicates with the main channel 30.

[0035] like Figure 1 As shown, the pressure-maintaining component A is located in the main channel 30 through the notch 31 and can move axially back and forth. After the injection is completed, the pressure-maintaining component A moves along the injection direction and applies pressure to achieve the pressure-maintaining action.

[0036] The independent injection and pressure-holding mechanism of the injection molding machine separates the injection action and the pressure-holding action through a barrel flange with a main channel and a branch channel and a pressure-holding component, thereby realizing independent injection and pressure-holding actions; and effectively solves the problem that during the injection molding process of the injection molding machine, a single power unit is difficult to simultaneously meet the requirements of both the rapid injection molding process and the long-term high-pressure pressure-holding molding process required by the product.

[0037] like Figure 1As shown, the pressure-maintaining assembly A is provided with a pressure-maintaining piston rod 22 and a connecting rod 23, the pressure-maintaining piston rod 22 and the connecting rod 23 pass through the notch 31 and are located in the main flow channel 30, the outer diameter of the pressure-maintaining piston rod 22 matches the inner diameter of the main flow channel 30, and the connecting rod 23 connects the pressure-maintaining piston rod 22 and drives it to move axially in the main flow channel 30. The pressure-maintaining assembly with the pressure-maintaining piston rod and the connecting rod has a simple structure and convenient action control.

[0038] like Figure 1 As shown, the pressure-maintaining assembly A is provided with a support seat 24, a pin 25, a pressure-maintaining actuator 26 and a pressure-maintaining power unit 27. The support seat 24 is fixed on the barrel flange 12, the pin 25 is mounted on the support seat 24, the connecting rod 23 is mounted on the pin 25, and rotates around the pin 25. One end of the connecting rod 23 is connected to the pressure-maintaining piston rod 22, and the other end is connected to the pressure-maintaining actuator 26. The pressure-maintaining actuator 26 is mounted on the pressure-maintaining power unit 27, and the pressure-maintaining power unit 27 provides power to drive the pressure-maintaining piston rod 22 to move axially. The pressure-maintaining assembly moves independently and can meet the needs of long-term high pressure maintenance.

[0039] like Figure 1 As shown, the utility model also discloses an injection molding machine, including the above-mentioned independent injection and pressure-maintaining mechanism of the injection molding machine. The injection molding machine satisfies the requirements of rapid response in the injection process and high pressure and long-term pressurization in the pressure-maintaining process.

[0040] like Figure 1 As shown, the injection molding machine also includes a supporting platform 1, a mold clamping power unit 2, a mold clamping actuator 3, a mold clamping tail plate 4, a mold clamping linear rail 5, a mold clamping pull rod 6, a mold clamping movable plate 7, a mold rear plate 8, a mold front plate 9 and a mold clamping head plate 10.

[0041] like Figure 1 As shown, the mold tail plate 4 and the mold head plate 10 are connected to form a mold frame through a mold tie rod 6 and are installed on the supporting platform 1.

[0042] like Figure 1 As shown, the mold closing power unit 2 and the mold closing actuator 3 are installed on the mold closing tail plate 4, and the mold closing linear rail 5 is fixed on the supporting platform 1.

[0043] like Figure 1 As shown, one end of the mold clamping actuator 3 is connected to the mold clamping movable plate 7, pushing the mold clamping movable plate 7 to move horizontally along the mold clamping linear rail 5, the mold rear plate 8 is fixed on the mold clamping movable plate 7, and the mold front plate 9 is fixed on the mold clamping head plate 10.

[0044] like Figure 1 As shown, the injection molding machine further includes an injection screw 14 , a shooting platform front plate 15 , a shooting platform pull rod 16 , a shooting platform movable plate 17 , a shooting platform tail plate 18 , an injection actuator 19 , an injection power unit 20 and an injection linear rail 21 .

[0045] like Figure 1 As shown, the shooting platform front plate 15 and the shooting platform tail plate 18 are installed and fixed on the supporting platform 1 through the shooting platform pull rod 16 to form a shooting platform frame; the pressure maintaining power unit 27 of the pressure maintaining assembly A is installed on the supporting platform 1.

[0046] like Figure 1 As shown, the injection actuator 19 and the injection power unit 20 are installed on the injection platform tail plate 18, and the injection linear rail 21 is fixed on the supporting platform 1.

[0047] like Figure 1 As shown, the shooting platform movable plate 17 can move horizontally along the injection line rail 21, the barrel 13 is installed on the shooting platform front plate 15, and the injection screw 14 is installed on the shooting platform movable plate 17. The outer diameter of the injection screw 14 matches the inner diameter of the barrel 13.

[0048] The above-mentioned injection molding machine independent injection pressure holding mechanism control method adopts the above-mentioned injection molding machine, including the following steps:

[0049] like Figure 4 As shown, when the mold clamping power unit drives the mold rear plate 8 to be close to the mold front plate 9 through the mold clamping actuator 3 and the mold clamping movable plate 7, the pressure holding power unit 27 drives the pressure holding piston rod 22 through the connecting rod 23 to seal the connecting channel between the branch channel 29 and the main channel 30 of the barrel flange 12 until the molten rubber material 28 completely enters the barrel 13;

[0050] like Figure 5 As shown, during the injection operation, the pressure-holding power unit 27 drives the pressure-holding piston rod 22 through the connecting rod 23 to open the connecting channel between the branch channel 29 and the main channel 30 and seal the rear end of the main channel 30. The injection power unit 20 drives the injection screw 14 through the injection actuator 19 and the active plate 17 of the injection platform to push the molten rubber 28 toward the barrel flange 12. The molten rubber 28 passes through the branch channel 29 of the barrel flange 12, the main channel 30 and the nozzle 11 into the mold cavity formed by the movable mold rear plate 8 and the mold front plate 9.

[0051] like Figure 6 As shown, the molten rubber 28 fills the mold cavity formed by the mold rear plate 8 and the mold front plate 9, and the pressure-holding power unit 27 drives the pressure-holding piston rod 22 to enter the main flow channel 30 of the barrel flange 12 through the connecting rod 23. The pressure-holding power unit 27 is activated, and the pressure-holding piston rod 22 moves axially along the injection direction and seals the connecting channel between the branch flow channel 29 and the main flow channel 30 of the barrel flange 12 and pushes the molten rubber 28 to continue to enter the mold cavity, realizing the pressure-holding action. The pressure value provided by the pressure-holding power unit 27 is F0, and the pressure-holding pressure value F=F0*L2 / L1.

[0052] The independent injection and pressure-holding mechanism of the injection molding machine and the injection molding machine have simple structures and are easy to control. The injection action and the pressure-holding action are separated to realize independent injection and pressure-holding actions. The requirements of rapid response in the injection process and high pressure and long time pressurization in the pressure-holding process can be met at the same time, and the needs of specific plastic products can be met.

[0053] In summary, the utility model is as described in the specification and the illustrations, and actual samples are made and tested for multiple times. From the test results, it is proved that the utility model can achieve the expected purpose and its practicality is beyond doubt. The above embodiments are only used to facilitate the description of the content of the utility model, and are not formally limited to it; any equivalent embodiment made by partial changes or modifications made by anyone with common knowledge in the technical field of the utility model without departing from the scope of the technical features and similar features of the utility model, using the technical content disclosed by the utility model, belongs to the protection scope of the utility model.

Claims

1. An independent injection and pressure-maintaining mechanism for an injection molding machine, characterized in that: It comprises a pressure-maintaining component (A), a supporting platform (1), a nozzle (11), a barrel flange (12) and a barrel (13), wherein the barrel flange (12) is mounted at the front end of the barrel (13), and the nozzle (11) is mounted on the barrel flange (12); the pressure-maintaining component (A), the nozzle (11), the barrel flange (12) and the barrel (13) are respectively located on the supporting platform (1); The barrel flange (12) comprises a main flow channel (30), a branch flow channel (29) and a notch (31); the main flow channel (30) is arranged at the center of the barrel flange (12) and is closed at the flange end; a plurality of branch flow channels (29) are opened around the flange end and communicate with the main flow channel (30); the notch (31) is close to the flange end and communicates with the main flow channel (30); The pressure-maintaining component (A) is located in the main channel (30) through the notch (31) and can move axially back and forth. After injection is completed, the pressure-maintaining component (A) moves along the injection direction and applies pressure to achieve a pressure-maintaining action.

2. The independent injection and pressure-maintaining mechanism of the injection molding machine according to claim 1, characterized in that: The pressure-maintaining component (A) is provided with a pressure-maintaining piston rod (22) and a connecting rod (23). The pressure-maintaining piston rod (22) and the connecting rod (23) pass through the notch (31) and are located in the main flow channel (30). The outer diameter of the pressure-maintaining piston rod (22) matches the inner diameter of the main flow channel (30). The connecting rod (23) is connected to the pressure-maintaining piston rod (22) and drives it to move axially in the main flow channel (30).

3. The independent injection and pressure-maintaining mechanism of the injection molding machine according to claim 2, characterized in that: The pressure-maintaining component (A) is provided with a support seat (24), a pin shaft (25), a pressure-maintaining actuator (26) and a pressure-maintaining power unit (27); the support seat (24) is fixed on the barrel flange (12); the pin shaft (25) is installed on the support seat (24); the connecting rod (23) is installed on the pin shaft (25) and rotates around the pin shaft (25); one end of the connecting rod (23) is connected to the pressure-maintaining piston rod (22) and the other end is connected to the pressure-maintaining actuator (26); the pressure-maintaining actuator (26) is installed on the pressure-maintaining power unit (27); and the pressure-maintaining power unit (27) provides power to drive the pressure-maintaining piston rod (22) to move axially.

4. An injection molding machine, characterized in that: It comprises the independent injection and pressure-maintaining mechanism of the injection molding machine as described in any one of claims 1 to 3.

5. The injection molding machine according to claim 4, characterized in that: It also includes a mold clamping power unit (2), a mold clamping actuator (3), a mold clamping tail plate (4), a mold clamping linear rail (5), a mold clamping pull rod (6), a mold clamping movable plate (7), a mold rear plate (8), a mold front plate (9) and a mold clamping head plate (10); The mold clamping tail plate (4) and the mold clamping head plate (10) are connected to form a mold clamping frame through the mold clamping tie rod (6) and are installed on the supporting platform (1); The mold clamping power unit (2) and the mold clamping actuator (3) are mounted on the mold clamping tail plate (4), and the mold clamping linear rail (5) is fixed on the supporting platform (1); One end of the mold clamping actuator (3) is connected to the mold clamping movable plate (7) to push the mold clamping movable plate (7) to move horizontally along the mold clamping linear rail (5); the mold rear plate (8) is fixed on the mold clamping movable plate (7); and the mold front plate (9) is fixed on the mold clamping head plate (10).

6. The injection molding machine according to claim 5, characterized in that: It also includes an injection screw (14), a front plate of a shooting platform (15), a pull rod of a shooting platform (16), a movable plate of a shooting platform (17), a tail plate of a shooting platform (18), an injection molding actuator (19), an injection molding power unit (20) and an injection molding linear rail (21); The shooting platform front plate (15) and the shooting platform tail plate (18) are installed and fixed on the supporting platform (1) by forming a shooting platform frame through the shooting platform pull rod (16); the pressure maintaining component (A) is installed on the supporting platform (1); The injection molding actuator (19) and the injection molding power unit (20) are mounted on the injection molding platform tail plate (18), and the injection molding linear rail (21) is fixed on the supporting platform (1); The shooting platform movable plate (17) can move horizontally along the injection line rail (21), the barrel (13) is mounted on the shooting platform front plate (15), the injection screw (14) is mounted on the shooting platform movable plate (17), and the outer diameter of the injection screw (14) matches the inner diameter of the barrel (13).

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