Mechanical anti-closing lock for injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, in particular to a mechanical anti-closing lock for an injection molding machine, the mechanical anti-closing lock is arranged on the injection molding machine, the mechanical anti-closing lock comprises a lock shell, a lock opening, a lock groove, a lock tongue and a limiting piece, the lock shell is fixedly connected with a rack of the injection molding machine, the lock opening is formed in a safety door of the injection molding machine, the lock groove is formed in the lock opening, and the lock tongue is arranged in the lock groove. The spring bolt is rotationally connected with the lock shell, the head end of the spring bolt is bent to form a buckling part, the lock groove is matched with the buckling part, the tail end of the spring bolt extends out of the lock shell to form a pressing part, the limiting piece is fixedly connected with the lock shell, and the limiting end of the limiting piece abuts against the head end of the spring bolt; when the safety door is locked, the buckling part of the lock tongue is located in the lock groove, the safety door cannot be automatically closed when being opened through cooperation of the lock tongue, the lock groove and the limiting piece, in this way, when an operator is in a machine, the safety door cannot be closed, and therefore the safety of the operator is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a mechanical anti-closing lock for injection molding machines. Background Art

[0002] Injection molding machine is also called injection molding machine or injection molding machine. It is the main molding equipment for various shapes of plastic products made of thermoplastics or thermosetting plastics using plastic molding molds. The injection molding machine mainly includes the following components: injection unit, clamping unit, hydraulic transmission device and electrical control system. The mechanical parts of the injection molding machine are composed of injection mechanism, clamping mechanism and frame. The mold is installed between the moving template and the fixed template. During the injection process, the moving template is clamped to the fixed template, clamping and providing the expansion force of the rubber in the mold cavity. The clamping force is generally from hundreds of thousands of tons of products. After the mold cavity cools, the ejection mechanism ejects the product. The whole production process will generate high temperature, and this process is somewhat dangerous. Therefore, in order to ensure the safety of the user, it is necessary to design a simple and reliable structure to limit the opening or closing of the safety door. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the problem in the prior art that when a user enters an injection molding machine for maintenance, if the safety door is accidentally closed, the user entering the injection molding machine may encounter a dangerous situation, and a mechanical anti-closing lock for the injection molding machine is provided.

[0004] The utility model solves the technical problem by adopting the following technical scheme: a mechanical anti-closing lock for an injection molding machine, the mechanical anti-closing lock is arranged on the injection molding machine, the mechanical anti-closing lock comprises a lock shell, a lock opening, a lock groove, a lock tongue and a limiter, the lock shell is fixedly connected to a frame of the injection molding machine, the lock opening is arranged on the safety door of the injection molding machine, the lock groove is arranged in the lock opening, the lock tongue is rotatably connected to the lock shell, the head end of the lock tongue is bent to form a buckling part, the lock groove and the buckling part match, the tail end of the lock tongue extends out of the lock shell to form a pressing part, the limiter is fixedly connected to the lock shell, and the limiter end of the limiter abuts against the head end of the lock tongue;

[0005] When locked, the buckling part of the lock tongue is located in the lock groove. Through the cooperation of the lock tongue, lock groove and limit piece, the safety door cannot be closed automatically when it is opened. In this way, when the operator is in the machine, the safety door will not be closed, thereby ensuring the safety of the operator.

[0006] In order to solve the problem that the head end of the lock tongue is in a drooping state in the initial state and is not easy to enter the lock mouth, the lock mouth further includes a port having an arc-shaped chamfer, and the chamfer is used to guide the lock tongue into the lock mouth.

[0007] In order to solve the problem that when the lock tongue enters the lock mouth, the lock tongue and the lock mouth collide with each other with great force, a shock-absorbing pad for contacting the lock tongue is further installed on the side wall of the lock mouth.

[0008] In order to solve the problem that the lock tongue is easily bounced up under the action of external forces such as vibration, causing the lock tongue to be separated from the lock slot, the present invention further includes a limit member including an outer shell, an elastic element, a connecting member and a roller. The outer shell and the lock shell are fixedly connected, the connecting member and the outer shell are slidably connected, the elastic element is arranged in the outer shell, and one end of the elastic element is against the outer shell, and the other end is against the connecting member. The roller is rotatably installed on the connecting member at one end close to the lock tongue.

[0009] It further comprises a lock groove being arranged on the bottom surface of the lock opening, a buckling portion being bent downward, and a limiting member being located above the lock tongue.

[0010] In order to solve the problem that the hand may slip when applying force downward during pressing, the pressing portion is further bent upward.

[0011] The beneficial effect of the utility model is that the utility model provides a mechanical anti-closing lock for an injection molding machine, which, through the cooperation of a lock tongue, a lock groove and a limit piece, makes the safety door unable to close automatically when it is opened. In this way, when the operator is in the machine, the safety door will not be closed, thereby ensuring the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the utility model from another perspective;

[0016] Figure 4 This utility model Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0017] In the figure: 1, lock shell, 2, lock mouth, 21, chamfer, 22, shock-absorbing pad, 3, lock groove, 4, lock tongue, 41, buckling part, 42, pressing part, 5, limiter, 51, shell, 52, elastic element, 53, connecting part, 54, roller, 6, safety door. DETAILED DESCRIPTION

[0018] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0019] like Figure 13, the locking cam 3 is a kind of locking cam 3 of the present invention, and ...

[0020] When locked, the buckling portion 41 of the lock tongue 4 is located in the lock groove 3. In this way, when the operator is in the machine, the safety door will not be closed, thereby ensuring the safety of the operator.

[0021] The end of the lock port 2 has an arc-shaped chamfer 21, which is used to guide the lock tongue 4 into the lock port 2, so that when the safety door 6 moves toward the lock shell 1, the buckling portion 31 of the lock tongue 4 can be directly introduced into the lock groove 3 to complete the locking, avoiding the process of lifting the lock tongue 4 and improving efficiency.

[0022] A shock-absorbing pad 22 for contacting the lock tongue 4 is installed on the side wall of the lock opening 2, which can reduce the vibration of the lock tongue 4 when entering the lock opening 2, and can also protect the lock tongue 2 to prevent its connection from loosening.

[0023] like Figure 2 As shown, the limiting member 5 includes a shell 51, an elastic element 52, a connecting member 53 and a roller 54. The shell 51 is fixedly connected to the lock shell 1, the connecting member 53 is slidably connected to the shell 51, the elastic element 52 is arranged in the shell 51, and one end of the elastic element 52 is against the shell 51, and the other end is against the connecting member 53. The roller 54 is rotatably installed on one end of the connecting member 53 close to the lock tongue 4, and the lock tongue 4 is pressed against the limiting member 5 to prevent it from popping out of the lock slot 3 under the influence of vibration or other external forces, thereby further increasing safety.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the lock slot 3 is provided on the bottom surface of the lock port 2, the buckling portion 41 is bent downward, and the limiter 5 is located above the lock tongue 4 to prevent the buckling portion 41 from easily escaping from the lock slot 3 and to avoid accidental contact.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the pressing portion 42 is bent upward, and the pressing portion 42 forms a limiting structure to prevent the user from slipping off the locking tongue 4 when applying force.

[0026] When locking, the safety door 6 is moved toward the lock shell 1, the lock mouth 2 contacts the buckling part 41 and under the action of the chamfer 21, the buckling part 41 is introduced into the lock mouth 2, and when the buckling part 41 moves to the lock groove 3, under the action of the downward force of the limit member 5, the buckling part 41 enters the lock groove 3 to complete the locking.

[0027] When unlocking, after the user exits the injection molding machine, he applies force on the pressing portion 42 to lift the buckling portion 41 and disengage from the lock slot 3. At this time, the safety door 6 can move freely, and the safety door 6 moves away from the lock shell 1 until the buckling portion 41 disengages from the lock port 2, completing the unlocking.

[0028] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A mechanical anti-lock for an injection molding machine, characterized in that: The mechanical anti-closing lock is arranged on an injection molding machine, and comprises a lock housing (1), a lock opening (2), a lock slot (3), a lock tongue (4) and a limiting member (5); the lock housing (1) is fixedly connected to a frame of the injection molding machine; the lock opening (2) is arranged on a safety door (6) of the injection molding machine; the lock slot (3) is arranged in the lock opening (2); the lock tongue (4) is rotatably connected to the lock housing (1); the front end of the lock tongue (4) is bent to form a buckling portion (41); the lock slot (3) and the buckling portion (41) match each other; the rear end of the lock tongue (4) extends out of the lock housing (1) to form a pressing portion (42); the limiting member (5) is fixedly connected to the lock housing (1), and the limiting end of the limiting member (5) abuts against the front end of the lock tongue (4); When locked, the buckling portion (41) of the locking tongue (4) is located in the locking groove (3).

2. A mechanical anti-closing lock for an injection molding machine as claimed in claim 1, characterized in that: The end of the lock opening (2) has a chamfer (21) in the shape of an arc, and the chamfer (21) is used to guide the lock tongue (4) into the lock opening (2).

3. A mechanical anti-lock for an injection molding machine as claimed in claim 1, characterized in that: A shock-absorbing pad (22) for contacting the lock tongue (4) is installed on the side wall of the lock opening (2).

4. A mechanical anti-closing lock for an injection molding machine as claimed in claim 1, characterized in that: The limiting member (5) comprises a housing (51), an elastic element (52), a connecting member (53) and a roller (54); the housing (51) is fixedly connected to the lock housing (1); the connecting member (53) is slidably connected to the housing (51); the elastic element (52) is arranged in the housing (51); one end of the elastic element (52) abuts against the housing (51) and the other end abuts against the connecting member (53); and the roller (54) is rotatably mounted on one end of the connecting member (53) close to the lock tongue (4).

5. The mechanical anti-locking device for an injection molding machine according to claim 1, characterized in that: The locking groove (3) is provided on the bottom surface of the locking opening (2), the buckling portion (41) is bent downward, and the limiting member (5) is located above the locking tongue (4).

6. A mechanical anti-lock for an injection molding machine as claimed in claim 1, characterized in that: The pressing portion (42) is bent upward.

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