Safety door lock for injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, in particular to a safety door lock for an injection molding machine, which comprises a control unit and a locking unit, the control unit comprises an electromagnetic switch, a control magnet and a control part, the electromagnetic switch is fixedly connected with the injection molding machine rack, the tail end of the control magnet is rotationally connected with the safety door body, the tail end of the control part is fixedly connected with the head end of the control magnet, and the control part is used for driving the control magnet to rotate, so that the control magnet is close to or away from the electromagnetic switch; the locking unit comprises a locking piece and a lock catch, the locking piece is fixedly connected with the lock catch, the lock catch is fixedly connected with the safety door, the locking piece is electrically connected with the electromagnetic switch, the electromagnetic switch is used for controlling the locking piece to fasten or loosen the lock catch, and through the design of the control unit, the safety door is prevented from being opened due to mistaken touch; and through the design of the locking unit, the safety door cannot be closed due to accidental reasons after being opened, so that the safety of maintenance personnel entering the injection molding machine is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a safety door lock for an injection molding machine. Background Art

[0002] An injection molding machine, also known as an injection molding machine or an injection machine, is an important device widely used in the plastic processing industry. The injection molding machine injects the plastic in a molten state (i.e., viscous flow state) that has been plasticized into a closed mold cavity by means of the thrust of a screw (or plunger), and obtains the product after curing and shaping. The injection machine needs a safety door to protect personnel and equipment during the product production process. In the prior art, an injection molding machine door lock requires one hand to press the lock tongue to unlock and the other hand to pull open the door, which is inconvenient to use; after the safety door is opened by using the door lock, the safety door can be locked after it is closed. Therefore, when a person enters the injection molding machine for maintenance, the safety door is extremely likely to close due to accidental reasons, resulting in the maintenance personnel being locked inside the injection molding machine, which is dangerous. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is: in order to overcome the problem that the door lock used in the injection molding machine in the prior art can freely open the safety door only by pressing the button on the safety door and can lock the safety door after it is opened and closed, therefore, when a person enters the injection molding machine for maintenance, the safety door is extremely likely to close due to accidental reasons, resulting in the maintenance personnel being locked inside the injection molding machine, which is dangerous, a safety door lock for an injection molding machine is provided.

[0004] The technical solution adopted by the utility model to solve its technical problem is: a safety door lock for an injection molding machine includes a control unit and a locking unit;

[0005] The control unit includes an electromagnetic switch, a control magnet and a control member. The electromagnetic switch is fixedly connected to the injection molding machine frame. The tail end of the control magnet is rotatably connected to the safety door body. The tail end of the control member is fixedly connected to the head end of the control magnet. The control member is used to drive the control magnet to rotate so that the control magnet approaches or moves away from the electromagnetic switch;

[0006] The locking unit includes a locking member and a lock catch. The locking member is fixedly connected to the lock catch. The lock catch is fixedly connected to the safety door. The locking member is electrically connected to the electromagnetic switch. The electromagnetic switch is used to control the locking member to fasten or loosen the lock catch. Through the design of the control unit, the safety door is prevented from being opened due to accidental touch; through the design of the locking unit, the safety door cannot be closed due to accidental reasons after it is opened, thus ensuring the safety of the maintenance personnel entering the injection molding machine.

[0007] In order to solve the problem of low reset efficiency of the control magnet, the control unit further includes a reset element. One end of the reset element is fixedly connected to the safety door body, and the other end is fixedly connected to the head end of the control magnet.

[0008] Further comprising that the head end of the operating member extends through the door body of the safety door to the side of the door body of the safety door away from the inside of the injection molding machine.

[0009] Further comprising that the control magnet is arranged on the side of the door body of the safety door close to the inside of the injection molding machine.

[0010] Further comprising that the operating member is a pull rope.

[0011] Further comprising that the locking member is an electric push rod, and the lock catch is provided with a lock hole for the rod part of the electric push rod to pass through.

[0012] The beneficial effects of the present utility model are as follows: A safety door lock for an injection molding machine provided by the present utility model avoids the safety door from being opened due to accidental touch through the design of the control unit; through the design of the locking unit, the safety door cannot be closed due to accidental reasons after being opened, thereby ensuring the safety of maintenance personnel entering the injection molding machine;

[0013] The safety door lock of the present application can be operated with one hand and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 is the front view structural schematic diagram of the present utility model;

[0016] Figure 2 is the present utility model Figure 1 The enlarged structural schematic diagram at position A;

[0017] Figure 3 is the present utility model Figure 2 The structural schematic diagram of the lock catch in a sectional state;

[0018] Figure 4 is the structural schematic diagram of the inner side of the present utility model;

[0019] Figure 5 is the present utility model Figure 1 The enlarged structural schematic diagram at position B.

[0020] In the figure: 1. Control unit, 11. Electromagnetic switch, 12. Control magnet, 13. Operating member, 14. Reset element, 2. Locking unit, 21. Locking member, 22. Lock catch, 221. Lock hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Now, the present utility model will be further described in detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0022] As Figure 1 shown in the structural schematic diagram of the present utility model, a safety door lock for an injection molding machine includes a control unit 1 and a locking unit 2;

[0023] The control unit 1 includes an electromagnetic switch 11, a control magnet 12, and an operating member 13. The electromagnetic switch 11 is fixedly connected to the injection molding machine frame. The tail end of the control magnet 12 is rotatably connected to the safety door body. The tail end of the operating member 13 is fixedly connected to the head end of the control magnet 12. The operating member 13 is used to drive the control magnet 12 to rotate, so that the control magnet 12 approaches or moves away from the electromagnetic switch 11. Through the design of the control unit 1, it is avoided that the safety door is opened due to accidental touch. The safety door lock of the present application can be operated with one hand and is convenient to use;

[0024] As Figure 2 、 Figure 3 shown, the control unit 1 further includes a reset element 14. One end of the reset element 14 is fixedly connected to the safety door body, and the other end is fixedly connected to the head end of the control magnet 12. The reset element 14 is a spring. After releasing the operating member 13, under the elastic force of the reset element 14, it quickly resets, and it can also avoid the situation that the control magnet 12 cannot release the electromagnetic switch 11 on the injection molding machine due to the magnetic part.

[0025] The head end of the operating member 13 passes through the safety door body and extends to the side of the safety door body away from the inside of the injection molding machine. The operating member 13 is a pull rope.

[0026] The control magnet 12 is arranged on the side of the safety door body close to the inside of the injection molding machine.

[0027] As Figure 4 shown, the locking unit 2 includes a locking member 21 and a lock catch 22. The locking member 21 is fixedly connected to the lock catch 22. The lock catch 22 is fixedly connected to the safety door. The locking member 21 is electrically connected to the electromagnetic switch 11. The electromagnetic switch 11 is used to control the locking member 21 to fasten or loosen the lock catch 22. Through the design of the locking unit 2, the safety door cannot be closed accidentally after being opened, thus ensuring the safety of maintenance personnel entering the injection molding machine.

[0028] The locking member 21 is an electric push rod, and the lock catch 22 has a lock hole 221 for the rod part of the electric push rod to pass through.

[0029] In the locked state, the rod part of the locking member 21 passes through the lock hole 221 of the lock catch 22 to complete the fixation of the safety door.

[0030] When unlocking, pulling the head end of the control member 13 drives the rotation of the control magnet 12. The control magnet 12 approaches the electromagnetic switch 11. After the electromagnetic switch 11 senses the control magnet 12, it emits a signal, causing the locking member 21 to be activated. The rod portion of the locking member 21 retracts and disengages from the lock hole 221, unlocking and enabling the safety door to be opened.

[0031] In the anti-closure state, after releasing the head end of the control member 13, the control magnet 12 is reset under the elastic force of the reset element 14, that is, the control magnet 12 disengages from the electromagnetic switch 11. The electromagnetic switch cannot sense the control magnet 12 and emits a signal, causing the locking member 21 to be activated. The rod portion of the locking member 21 extends. At this time, the rod portion of the locking member 21 protrudes from the lock catch 22. Therefore, when the safety door is closed, the lock catch 22 is restricted by the rod portion of the locking member 21 and cannot be closed.

[0032] Enlightened by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A safety door lock for an injection molding machine, characterized in that: It comprises a control unit (1) and a locking unit (2); The control unit (1) comprises an electromagnetic switch (11), a control magnet (12) and a control member (13); the electromagnetic switch (11) is fixedly connected to a frame of an injection molding machine; the tail end of the control magnet (12) is rotatably connected to a safety door body; the tail end of the control member (13) is fixedly connected to a head end of the control magnet (12); the control member (13) is used to drive the control magnet (12) to rotate so that the control magnet (12) approaches or moves away from the electromagnetic switch (11); The locking unit (2) comprises a locking member (21) and a lock catch (22), wherein the locking member (21) and the lock catch (22) are fixedly connected, the lock catch (22) and the safety door are fixedly connected, the locking member (21) and the electromagnetic switch (11) are electrically connected, and the electromagnetic switch (11) is used to control the locking member (21) to tighten or loosen the lock catch (22).

2. A safety door lock for an injection molding machine as claimed in claim 1, characterized in that: The control unit (1) also includes a reset element (14), one end of which is fixedly connected to the safety door body, and the other end of which is fixedly connected to the head end of the control magnet (12).

3. A safety door lock for an injection molding machine as claimed in claim 1, characterized in that: The head end of the operating member (13) passes through the safety door body and extends to a side of the safety door body away from the inside of the injection molding machine.

4. A safety door lock for an injection molding machine as claimed in claim 1, characterized in that: The control magnet (12) is arranged on one side of the safety door body close to the inside of the injection molding machine.

5. A safety door lock for an injection molding machine as claimed in claim 1, characterized in that: The control member (13) is a pull rope.

6. A safety door lock for an injection molding machine as claimed in claim 1, characterized in that: The locking member (21) is an electric push rod, and the lock buckle (22) is provided with a lock hole (221) for allowing the rod portion of the electric push rod to pass through.

Images