Ejection mechanism of vertical injection molding machine

Abstract

The utility model discloses an ejection mechanism of a vertical injection molding machine, which comprises a supporting seat, a pre-ejection sleeve is arranged in the supporting seat, a servo motor and a charging barrel are respectively arranged at the front end and the rear end of the supporting seat, a driving end of the servo motor is sequentially connected with a pressure sensor, an extension rod and a screw rod, and an electromagnetic pressure release valve is connected onto the pre-ejection sleeve. A hopper is connected to the charging barrel, and a linkage base is arranged at one end of the servo motor. The utility model has the beneficial effects that the preset sleeve is adopted to reserve a stroke space for the screw rod, and stable pressure is realized through the electromagnetic pressure release valve, so that not only is the detection precision of the pressure sensor ensured, but also the uniformity of the internal pressure of the charging barrel is ensured, and the glue injection quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, and specifically relates to an injection mechanism of a vertical injection molding machine. Background Technique

[0002] An injection molding machine, also known as an injection molding machine or an injection machine, is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting plastics using plastic molding dies. In the injection molding process of plastics, the control of injection pressure is the key to improving product quality. For example, the holding pressure, in fact, is one of the important parameters for controlling the quality of the molten material and the product quality in the injection molding process parameters.

[0003] The holding pressure helps to compact the material in the screw groove, remove the gas in the material, and accelerate the heat transfer between the pellets. However, the existence of the holding pressure will also cause uneven pressure in the barrel and affect the injection accuracy. Content of the Utility Model

[0004] The purpose of the utility model is to provide an injection mechanism of a vertical injection molding machine to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An injection mechanism of a vertical injection molding machine provided by the utility model includes a support base. A pre-injection sleeve is arranged inside the support base. A servo motor and a barrel are respectively arranged at the front and rear ends of the support base. The driving end of the servo motor is sequentially connected with a pressure sensor, an extension rod and a screw. An electromagnetic pressure relief valve is connected to the pre-injection sleeve. A hopper is connected to the barrel. A linkage seat is arranged at one end of the servo motor.

[0007] Further, both the extension rod and the screw penetrate through the support base, and one end of the extension rod is located inside the pre-injection sleeve.

[0008] Further, the screw is connected to the extension rod, and a pressing head is arranged at the end of the screw. The screw is located inside the barrel.

[0009] Further, both ends of the pressure sensor are respectively connected to the driving end of the servo motor and the extension rod. The pressure sensor is arranged inside the pre-injection sleeve.

[0010] Further, the support base includes a front injection table plate and a rear injection table plate, and the front injection table plate and the rear injection table plate are connected by a plurality of injection table guide rods.

[0011] Further, there is a stroke space between the pre-injection sleeve and the pressure sensor. Both ends of the pre-injection sleeve are fixedly connected to the front injection table plate and the rear injection table plate through flange plates.

[0012] Beneficial effects: An injection mechanism of a vertical injection molding machine uses a preset sleeve to reserve a stroke space for the screw and realizes stable pressure through an electromagnetic pressure relief valve, which not only ensures the detection accuracy of the pressure sensor but also ensures the uniformity of the internal pressure of the barrel, improving the injection quality. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 It is a sectional view of the partial structure of the present utility model.

[0015] Reference Signs

[0016] 1 - Support base, 101 - Front injection table plate, 102 - Rear injection table plate, 103 - Injection table guide rod, 2 - Pre - injection sleeve, 3 - Servo motor, 4 - Barrel, 5 - Pressure sensor, 6 - Extension rod, 7 - Screw, 8 - Electromagnetic pressure relief valve, 9 - Hopper, 10 - Ram, 11 - Linkage seat. Detailed Embodiments

[0017] The following are specific embodiments of the present utility model in combination with the drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0018] Embodiment

[0019] As Figure 1-2 shown, an injection mechanism of a vertical injection molding machine includes a support base 1. A pre - injection sleeve 2 is arranged inside the support base 1. A servo motor 3 and a barrel 4 are respectively arranged at the front and rear ends of the support base 1. The driving end of the servo motor 3 is sequentially connected with a pressure sensor 5, an extension rod 6 and a screw 7. An electromagnetic pressure relief valve 8 is connected to the pre - injection sleeve 2. A hopper 9 is connected to the barrel 4. A linkage seat 11 is arranged at one end of the servo motor 3.

[0020] Both the extension rod 6 and the screw 7 penetrate through the support base 1. One end of the extension rod 6 is located inside the pre - injection sleeve 2. The screw 7 is connected to the extension rod 6. A ram 10 is arranged at the end of the screw 7. The screw 7 is located inside the barrel 4. Both ends of the pressure sensor 5 are respectively connected with the driving end of the servo motor 3 and the extension rod 6. The pressure sensor 5 is arranged inside the pre - injection sleeve 2. Start the servo motor 3 to drive the extension rod 6 and the screw 7 to rotate, and inject the molten material in the hopper 9 into the molding die.

[0021] There is a stroke space between the pre-injection sleeve 2 and the pressure sensor 5. Both ends of the pre-injection sleeve 2 are fixedly connected to the front injection table plate 101 and the rear injection table plate 102 through flange plates. The preset sleeve 2 is arranged in the support seat 1. When the screw rod 7 performs a retraction action, the preset sleeve 2 provides a receiving space for the extension rod 6. The preset sleeve 2 is connected to the barrel 4. During use, the internal pressure of the barrel 4 can be adjusted through the electromagnetic pressure relief valve 8 on the preset sleeve 2, which is beneficial for the pressure sensor 5 inside to provide an environment for accurate pressure measurement, prevent errors in pressure measurement, and ensure that the barrel 4 has a uniform pressure value to control the injection accuracy.

[0022] When the injection mechanism provided by the present utility model is in use, it cooperates with the oil cylinder to drive the linkage seat 11, driving the servo motor 3 and the connected pressure sensor 5, extension rod 6 and screw rod 7 to perform linear reciprocating motion to achieve the injection action.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An injection mechanism of a vertical injection molding machine, including a support base (1), characterized in that: A pre-injection sleeve (2) is provided inside the support base (1). A servo motor (3) and a barrel (4) are respectively arranged at the front and rear ends of the support base (1). The driving end of the servo motor (3) is sequentially connected with a pressure sensor (5), an extension rod (6) and a screw rod (7). An electromagnetic pressure relief valve (8) is connected to the pre-injection sleeve (2). A hopper (9) is connected to the barrel (4). A linkage seat (11) is arranged at one end of the servo motor (3).

2. The injection mechanism of a vertical injection molding machine according to claim 1, characterized in that: Both the extension rod (6) and the screw rod (7) penetrate through the support base (1), and one end of the extension rod (6) is located inside the pre-injection sleeve (2).

3. The injection mechanism of a vertical injection molding machine according to claim 1, characterized in that: The screw rod (7) is connected to the extension rod (6), and a pressing head (10) is arranged at the end of the screw rod (7). The screw rod (7) is located inside the barrel (4).

4. The injection mechanism of a vertical injection molding machine according to claim 1, characterized in that: Both ends of the pressure sensor (5) are respectively connected to the driving end of the servo motor (3) and the extension rod (6). The pressure sensor (5) is arranged inside the pre-injection sleeve (2).

5. The injection mechanism of a vertical injection molding machine according to claim 1, characterized in that: The support base (1) includes a front injection table plate (101) and a rear injection table plate (102), and the front injection table plate (101) and the rear injection table plate (102) are connected by a plurality of injection table guide rods (103).

6. The injection mechanism of a vertical injection molding machine according to claim 5, characterized in that: There is a stroke space between the pre-injection sleeve (2) and the pressure sensor (5). Both ends of the pre-injection sleeve (2) are fixedly connected to the front injection table plate (101) and the rear injection table plate (102) through flange plates.

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