Injection molding machine nozzle glue sealing mechanism and injection molding machine

Abstract

The utility model provides an injection molding machine nozzle glue sealing mechanism and an injection molding machine, the injection molding machine nozzle glue sealing mechanism comprises a nozzle main body, a spraying cavity is arranged in the nozzle main body, the front end of the nozzle main body is provided with a melt nozzle hole communicated with the spraying cavity, and the rear end of the nozzle main body is provided with a melt inlet pipe communicated with the spraying cavity; the nozzle body is provided with a control valve assembly used for controlling opening and closing of the melt nozzle hole, the control valve assembly comprises a nozzle hole plug, a pneumatic valve element and a pneumatic driving part, the nozzle hole plug is movably arranged in the spraying cavity and connected with the pneumatic valve element, and the pneumatic valve element is slidably connected into the nozzle body. The pneumatic driving part is connected to the nozzle body and used for driving the pneumatic valve element to move so that the nozzle hole plug can be far away from or close to the melt nozzle hole, and a heating part used for heating the spraying cavity is arranged on the nozzle body. According to the injection molding machine nozzle glue sealing mechanism and the injection molding machine, the nozzle can be prevented from being blocked after the injection molding machine is shut down.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding processing, in particular to a nozzle sealing mechanism of an injection molding machine and an injection molding machine. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding fields such as complex-shaped products. The feeding mechanism of the injection molding machine generally includes a hopper and a nozzle. The nozzle sprays the injection material into the mold cavity and then forms the product. However, after the injection molding machine stops running, the injection molten material in the nozzle cools and solidifies, causing the nozzle to be blocked, thereby affecting the normal operation of the injection molding machine. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the nozzle is easily blocked when the injection molding machine stops. In order to overcome the defects of the above prior art, the utility model provides a nozzle sealing mechanism for the injection molding machine.

[0004] The utility model provides a nozzle sealing mechanism for an injection molding machine, which comprises a nozzle body, wherein a spray cavity is arranged in the nozzle body, a molten material nozzle hole communicating with the spray cavity is arranged at the front end of the nozzle body, a molten material inlet pipe communicating with the spray cavity is arranged at the rear end of the nozzle body, a control valve assembly for controlling the opening and closing of the molten material nozzle hole is arranged on the nozzle body, the control valve assembly comprises a nozzle hole plug, a pneumatic valve core and a pneumatic drive unit, the nozzle hole plug is movably arranged in the spray cavity and connected with the pneumatic valve core, the pneumatic valve core is slidably connected in the nozzle body, the pneumatic drive unit is connected to the nozzle body and is used to drive the pneumatic valve core to move, so that the nozzle hole plug is moved away from or close to the molten material nozzle hole, and a heating component for heating the spray cavity is arranged on the nozzle body.

[0005] Compared with the prior art, the nozzle sealing mechanism of an injection molding machine disclosed in the present application has the following advantages: by setting a control valve assembly, the pneumatic drive unit drives the pneumatic valve core to move, and the pneumatic valve core drives the nozzle hole plug to move, so that the nozzle hole plug moves away from or close to the molten material nozzle hole, that is, the control valve assembly can open and close the molten material nozzle hole. When the injection molding stops, the molten material nozzle hole is closed, and the heating component continues to heat the molten material in the spray chamber to avoid the molten material solidifying in the spray chamber and prevent the nozzle from being blocked. At the same time, pneumatic control is used to reduce the impact of high temperature on the control valve assembly and improve control reliability.

[0006] In a possible implementation manner, a guide block is fixedly provided in the nozzle body, a guide hole is provided on the guide block, and the nozzle hole plug is a valve stem, and the valve stem is slidably provided in the guide hole.

[0007] Compared with the prior art, the above technical solution can provide a moving guide for the nozzle hole plug, thereby improving the control reliability of the control valve assembly.

[0008] In a possible implementation manner, the outer diameter of the valve stem is the same as the inner diameter of the melt nozzle hole.

[0009] Compared with the prior art, the above technical solution can improve the airtightness of the melt nozzle hole and prevent liquid leakage after shutdown.

[0010] In a possible embodiment, a pneumatic valve cavity is further provided in the nozzle body, and the pneumatic valve core is slidably arranged in the pneumatic valve cavity. The pneumatic valve cavity separates the pneumatic valve core into a first cavity and a second cavity. The pneumatic drive unit includes an air pump, and the first cavity and the second cavity are both connected to the air pump through an air pipe.

[0011] Compared with the prior art, the above technical solution can realize the movement of the driving pneumatic valve core.

[0012] In a possible implementation manner, a sealing ring is provided between the pneumatic valve core and the pneumatic valve cavity for sealing the first cavity and the second cavity.

[0013] Compared with the prior art, the above technical solution can improve the airtightness of the first cavity and the second cavity.

[0014] In a possible implementation manner, one end of the valve stem away from the melt nozzle hole is a T-shaped head, and the pneumatic valve core is provided with a T-shaped slot matching the T-shaped head.

[0015] Compared with the prior art, the above technical solution can improve the connection reliability between the valve stem and the pneumatic valve core.

[0016] In a possible implementation, the heating component is an electric heating sleeve sleeved on the nozzle body.

[0017] Compared with the prior art, the above technical solution can make the structure simple and easy to use.

[0018] In a possible implementation manner, an external thread is provided on the outer peripheral wall of the melt inlet pipe.

[0019] Compared with the prior art, the above technical solution can facilitate the connection of the nozzle to the injection molding machine, thereby improving the convenience of installation.

[0020] The utility model also provides an injection molding machine, comprising the above-mentioned injection molding machine nozzle sealing mechanism and an electric drive feeding mechanism, wherein the discharge end of the electric drive feeding mechanism is connected to the molten material inlet pipe, thereby improving the feeding stability of the injection molding molten material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the nozzle sealing mechanism of the injection molding machine of the utility model;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 3 It is a schematic diagram of the connection structure between the valve stem and the pneumatic valve core;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the injection molding machine of the utility model;

[0025] Description of reference numerals:

[0026] 1. Nozzle body; 11. Spray chamber; 12. Molten material nozzle hole; 13. Molten material inlet pipe; 14. Pneumatic valve chamber; 2. Control valve assembly; 21. Valve stem; 211. T-head; 22. Pneumatic valve core; 221. T-slot; 23. Air pipe; 3. Heating component; 4. Guide block; 41. Guide hole; 5. Sealing ring; 6. Electric drive feeding mechanism. DETAILED DESCRIPTION

[0027] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0028] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0029] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] The feeding mechanism of an injection molding machine generally includes a hopper and a nozzle. The nozzle sprays the injection material into the mold cavity to form a product. However, after the injection molding machine stops running, the injection material in the nozzle cools and solidifies, causing the nozzle to be blocked, thus affecting the normal operation of the injection molding machine.

[0031] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] See also Figures 1 to 3 The embodiment of the present application discloses a nozzle sealing mechanism for an injection molding machine, which includes a nozzle body 1, a spray chamber 11 is provided in the nozzle body 1, a molten material nozzle hole 12 connected to the spray chamber 11 is provided at the front end of the nozzle body 1, and a molten material inlet pipe 13 connected to the spray chamber 11 is provided at the rear end of the nozzle body 1. A control valve assembly 2 for controlling the opening and closing of the molten material nozzle hole 12 is provided on the nozzle body 1, and the control valve assembly 2 includes a nozzle hole plug, a pneumatic valve core 22 and a pneumatic drive unit. The nozzle hole plug is movably arranged in the spray chamber 11 and connected to the pneumatic valve core 22, and the pneumatic valve core 22 is slidably connected in the nozzle body 1. The pneumatic drive unit is connected to the nozzle body 1 and is used to drive the pneumatic valve core 22 to move so that the nozzle hole plug moves away from or close to the molten material nozzle hole 12. A heating component 3 for heating the spray chamber 11 is provided on the nozzle body 1.

[0033] As can be known from the above, by setting up the control valve assembly 2, the pneumatic drive unit drives the pneumatic valve core 22 to move, and the pneumatic valve core 22 drives the nozzle hole plug to move, so that the nozzle hole plug moves away from or close to the molten nozzle hole 12, that is, the control valve assembly 2 opens and closes the molten nozzle hole 12. When the injection molding stops, the molten nozzle hole 12 is closed, and the heating component 3 continues to heat the molten material in the spray chamber 11 to avoid the molten material solidifying in the spray chamber 11 and prevent the nozzle from being blocked. At the same time, pneumatic control is used to reduce the impact of high temperature on the control valve assembly 2 and improve control reliability.

[0034] In this embodiment, a guide block 4 is fixedly provided in the nozzle body 1, and a guide hole 41 is provided on the guide block 4. The nozzle hole plug is a valve stem 21, and the valve stem 21 is slidably inserted into the guide hole 41, thereby providing a moving guide for the nozzle hole plug and improving the control reliability of the control valve assembly 2.

[0035] In this embodiment, the outer diameter of the valve stem 21 is the same as the inner diameter of the melt nozzle hole 12, thereby improving the airtightness of the melt nozzle hole 12 and preventing leakage after shutdown.

[0036] In this embodiment, a pneumatic valve chamber 14 is further provided in the nozzle body 1, and the pneumatic valve core 22 is slidably arranged in the pneumatic valve chamber 14. The pneumatic valve chamber 14 divides the pneumatic valve core 22 into a first chamber and a second chamber. The pneumatic drive unit includes an air pump, and the first chamber and the second chamber are both connected to the air pump through an air pipe 23, thereby driving the movement of the pneumatic valve core 22.

[0037] In this embodiment, a sealing ring 5 is provided between the pneumatic valve core 22 and the pneumatic valve cavity 14 for sealing the first cavity and the second cavity, thereby improving the air tightness of the first cavity and the second cavity.

[0038] In this embodiment, the end of the valve stem 21 away from the melt nozzle hole 12 is a T-shaped head 211, and the pneumatic valve core 22 is provided with a T-shaped slot 221 matching the T-shaped head 211, thereby improving the connection reliability between the valve stem 21 and the pneumatic valve core 22.

[0039] In this embodiment, the heating component 3 is an electric heating sleeve sleeved on the nozzle body 1 .

[0040] In this embodiment, an external thread is provided on the outer peripheral wall of the melt inlet pipe 13, thereby facilitating the connection of the nozzle to the injection molding machine and improving installation convenience.

[0041] See also Figure 4 The embodiment of the present application also discloses an injection molding machine, including the above-mentioned injection molding machine nozzle sealing mechanism and the electric-driven feeding mechanism 6, wherein the discharge end of the electric-driven feeding mechanism 6 is connected to the molten material inlet pipe 13, thereby improving the feeding stability of the injection molding molten material.

[0042] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0043] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0044] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A nozzle sealing mechanism for an injection molding machine, comprising a nozzle body (1), wherein a spray cavity (11) is provided in the nozzle body (1), a molten material nozzle hole (12) communicating with the spray cavity (11) is provided at the front end of the nozzle body (1), and a molten material inlet pipe (13) communicating with the spray cavity (11) is provided at the rear end of the nozzle body (1), characterized in that: The nozzle body (1) is provided with a control valve assembly (2) for controlling the opening and closing of the molten material nozzle hole (12), and the control valve assembly (2) comprises a nozzle hole plug, a pneumatic valve core (22) and a pneumatic drive unit. The nozzle hole plug is movably arranged in the spray chamber (11) and connected to the pneumatic valve core (22). The pneumatic valve core (22) is slidably connected in the nozzle body (1). The pneumatic drive unit is connected to the nozzle body (1) and is used to drive the pneumatic valve core (22) to move so that the nozzle hole plug moves away from or closer to the molten material nozzle hole (12). The nozzle body (1) is provided with a heating component (3) for heating the spray chamber (11).

2. The nozzle sealing mechanism of the injection molding machine according to claim 1, characterized in that: A guide block (4) is fixedly arranged inside the nozzle body (1), a guide hole (41) is arranged on the guide block (4), the nozzle hole plug is a valve stem (21), and the valve stem (21) is slidably inserted into the guide hole (41).

3. The nozzle sealing mechanism of the injection molding machine according to claim 2, characterized in that: The outer diameter of the valve stem (21) is the same as the inner diameter of the melt nozzle hole (12).

4. The nozzle sealing mechanism of the injection molding machine according to claim 2, characterized in that: A pneumatic valve chamber (14) is also provided in the nozzle body (1), and the pneumatic valve core (22) is slidably arranged in the pneumatic valve chamber (14). The pneumatic valve chamber (14) divides the pneumatic valve core (22) into a first chamber and a second chamber. The pneumatic drive unit includes an air pump, and the first chamber and the second chamber are both connected to the air pump via an air pipe (23).

5. The nozzle sealing mechanism for an injection molding machine according to claim 4, characterized in that: A sealing ring (5) is provided between the pneumatic valve core (22) and the pneumatic valve cavity (14) for sealing the first cavity and the second cavity.

6. The nozzle sealing mechanism for an injection molding machine according to claim 4, characterized in that: One end of the valve stem (21) away from the melt nozzle hole (12) is a T-shaped head (211), and the pneumatic valve core (22) is provided with a T-shaped slot (221) matching the T-shaped head (211).

7. The nozzle sealing mechanism for an injection molding machine according to claim 1, characterized in that: The heating component (3) is an electric heating sleeve sleeved on the nozzle body (1).

8. The nozzle sealing mechanism for an injection molding machine according to claim 1, characterized in that: The outer peripheral wall of the molten material inlet pipe (13) is provided with an external thread.

9. An injection molding machine, comprising the injection molding machine nozzle sealing mechanism according to any one of claims 1 to 8, characterized in that: It also includes an electrically driven feeding mechanism (6), wherein the discharge end of the electrically driven feeding mechanism (6) is connected to the molten material inlet pipe (13).

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