Sliding self-locking device of injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, in particular to a sliding self-locking device of an injection molding machine, which comprises a connecting piece, a lock rod and a lock body with a lock channel, the lock body is fixedly connected with a shell of the injection molding machine, the connecting piece is rotatably connected with a safety movable door of the injection molding machine, and the tail end of the lock rod is positioned in the lock channel. The head end of the lock rod is elastically connected with the connecting piece, and the tail end of the lock rod abuts against the lock channel. The lock channel comprises a first channel, a lock groove and a second channel, the tail end of the first channel is communicated with the lock groove, a fall type first step face is formed between the tail end of the first channel and the lock groove, the head end of the second channel is communicated with the lock groove, and a gradual change type first transition face is formed between the lock groove and the head end of the second channel. The tail end of the second channel communicates with the head end of the first channel, through cooperation of the elastically-arranged lock rod and the lock channel with the continuously-changing height, the injection molding machine can complete self-locking when the injection molding machine is not manually closed, and the use safety of the injection molding machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a sliding self-locking device of an injection molding machine. Background Art

[0002] Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal, and all-electric types. At present, the safety movable doors of existing injection molding machines are mostly closed and fixed by means of retaining springs and pins. Due to the vibration of the machine during the production process, the movable door panel will slip. Some injection molding machine models have position sensors. After detecting that the door panel is disengaged, it will cause shutdown and affect the normal production of the machine. Other models do not have safety devices. Once the safety door is opened during the production process, there is a great safety risk. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the problem that the safety movable door of the injection molding machine in the prior art mostly adopts the method of retaining spring and pin shaft to close the door and fix it, due to the vibration of the machine during the production process, the movable door plate will slip, and some injection molding machine models have position sensors, which will cause the machine to stop after detecting that the door plate is disengaged, affecting the normal production of the machine, and other models are not equipped with safety devices. Once the safety door is opened during the production process, there is a great safety risk. A sliding self-locking device for an injection molding machine is provided.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a sliding self-locking device of an injection molding machine, comprising a connecting piece, a locking rod and a lock body with a lock path, the lock body is fixedly connected to the shell of the injection molding machine, the connecting piece is rotatably connected to the safety movable door of the injection molding machine, the tail end of the locking rod is located in the lock path, the head end of the locking rod is elastically connected to the connecting piece and the tail end of the locking rod is against the lock path;

[0005] The lock track includes a first channel, a lock groove and a second channel. The tail end of the first channel is connected to the lock groove, and a first step surface with a drop is formed between the tail end of the first channel and the lock groove. The head end of the second channel is connected to the lock groove, and a first gradual transition surface is formed between the lock groove and the head end of the second channel. The head end of the second channel is higher than the height of the bottom of the lock groove. The tail end of the second channel is connected to the head end of the first channel, and a second step surface with a drop is formed between the tail end of the second channel and the head end of the first channel. Through the cooperation of the elastically arranged locking rod and the lock track with constantly changing height, the injection molding machine can complete self-locking when it is not manually closed, thereby improving the safety of the injection molding machine.

[0006] It further comprises that the height of the bottom surface of the first channel increases first and then decreases from the head end to the tail end, and then tends to be flat, and the first channel has an arc-shaped structure.

[0007] It further includes that the height of the bottom surface of the second channel increases first and then decreases from the head end to the tail end, and then tends to be gentle, the second channel is an arc-shaped structure, and the second channel has a corner.

[0008] The invention further comprises a cavity on the connecting piece for the lock rod to move, an elastic element is arranged in the cavity of the connecting piece, one end of the elastic element abuts against the connecting piece, and the other end abuts against the lock rod.

[0009] It further comprises an elastic element sleeved on the locking rod.

[0010] The beneficial effect of the utility model is that the sliding self-locking device of the injection molding machine provided by the utility model can realize self-locking when the injection molding machine is not manually closed through the cooperation of the elastically arranged locking rod and the locking path with constantly changing height, thereby improving the safety of the use of the injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0014] Figure 3 This utility model Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0015] Figure 4 It is a structural schematic diagram of the lock body of the utility model.

[0016] In the figure: 1, connecting piece, 2, locking rod, 3, lock body, 31, lock channel, 311, first channel, 312, lock groove, 313, second channel, 3131, corner, 314, first step surface, 315, first transition surface, 316, second step surface, 4, elastic element. DETAILED DESCRIPTION

[0017] 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.

[0018] like Figure 1 : is a structural schematic diagram of the utility model, a sliding self-locking device for an injection molding machine, comprising a connecting member 1, a locking rod 2 and a lock body 3 with a lock path 31, the lock body 3 is fixedly connected to the housing of the injection molding machine, the connecting member 1 is rotatably connected to the safety movable door of the injection molding machine, and the tail end of the locking rod 2 is located in the lock path 31, such as Figure 1 , Figure 3 As shown, the head end of the lock rod 2 is elastically connected to the connecting member 1 so that the tail end of the lock rod 2 abuts against the lock path 31. The connecting member 1 has a cavity for the lock rod 2 to move. The cavity of the connecting member 1 has an elastic element 4. One end of the elastic element 4 abuts against the connecting member 1 and the other end abuts against the lock rod 2. The elastic element 4 is sleeved on the lock rod 2.

[0019] like Figure 1 , Figure 4 As shown, the lock channel 31 includes a first channel 311, a lock groove 312 and a second channel 313. The tail end of the first channel 311 is connected to the lock groove 312. A first step surface 314 of a drop type is formed between the tail end of the first channel 311 and the lock groove 312. The height of the bottom surface of the first channel 311 increases first and then decreases from its head end to the tail end, and then tends to be gentle, and has an arc-shaped structure. The slope of the first channel 311 is 1°-10°, so that it can drive the lock rod 2 to move into the lock groove 312 during the closing stroke of the safety movable door of the injection molding machine. The first channel 311 has an ascending section (with a slope of 1°-10°), a descending section and a gentle section from its head end to the tail end. The coordinated use of the descending section and the gentle section of the first channel 311 can prevent the lock rod 2 from retreating and move the lock rod 2 into the lock groove 312. The first step surface 314 can prevent the safety movable door from being disengaged during the production vibration of the injection molding machine and complete self-locking.

[0020] like Figure 1 , Figure 4 As shown, the head end of the second channel 313 is connected to the lock groove 312, and a gradual first transition surface 315 is formed between the lock groove 312 and the head end of the second channel 313. The height of the head end of the second channel 313 is higher than the height of the bottom of the lock groove 312. The slope of the first transition surface 315 is first increased and then decreased, and the whole structure is conical. The slope of the rising section of the first transition surface 315 is 20°-60°, which is to prevent it from slipping out of the lock groove on the one hand, and to facilitate unlocking after force is applied on the other hand.

[0021] The height of the bottom surface of the second channel 313 increases first and then decreases from its head end to the tail end, and then tends to be flat, forming an arc-shaped structure. The second channel 313 has a corner 3131 to increase safety. The safety movable door can only be unlocked and opened after a second release. The vibration of the injection molding machine is not enough to make the locking rod 2 move through the corner 3131. The first transition surface 315 is part of the second channel 313.

[0022] like Figure 1 , Figure 4As shown, the tail end of the second channel 313 is connected to the head end of the first channel 311, and a second step surface 316 with a drop is formed between the tail end of the second channel 313 and the head end of the first channel 311 to prevent the locking rod 2 from retreating, and the turning points of the lock channel 31 in the present application all adopt arc angle transition to facilitate the movement of the locking rod 2.

[0023] When in use, if the safety movable door is not closed, it is driven by the closing stroke of the safety movable door of the injection molding machine, so that the locking rod 2 moves along the lock path 31, and falls into the locking groove 312 after passing through the first channel 311. Due to the large slope of the first transition surface 315 and the influence of the elastic force of the elastic element 4 on the locking rod, the locking rod 2 cannot fall off the locking groove 312 to complete self-locking. When unlocking is required, the safety movable door needs to be pushed forward a distance again, so that the locking rod 2 disengages from the locking groove 312 and passes through the corner 3131 to be unlocked, and then moves along the second channel 313 to between the second channel 313 and the first channel 311, so that the safety movable door is opened.

[0024] 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 sliding self-locking device for an injection molding machine, It is characterized in that The invention comprises a connecting member (1), a locking rod (2) and a lock body (3) having a locking track (31); the lock body (3) is fixedly connected to a housing of an injection molding machine; the connecting member (1) is rotatably connected to a safety movable door of the injection molding machine; the rear end of the locking rod (2) is located in the locking track (31); the front end of the locking rod (2) is elastically connected to the connecting member (1) so that the rear end of the locking rod (2) abuts against the locking track (31); The locking channel (31) comprises a first channel (311), a locking groove (312) and a second channel (313); the tail end of the first channel (311) is connected to the locking groove (312); a first step surface (314) with a drop is formed between the tail end of the first channel (311) and the locking groove (312); the head end of the second channel (313) is connected to the locking groove (312); a first gradual transition surface (315) is formed between the locking groove (312) and the head end of the second channel (313); the head end of the second channel (313) is higher than the bottom of the locking groove (312); the tail end of the second channel (313) is connected to the head end of the first channel (311).

2. A sliding self-locking device for an injection molding machine as claimed in claim 1, Features: The height of the bottom surface of the first channel (311) increases first and then decreases from its head end to its tail end, and then tends to be flat, and the first channel (311) has an arc-shaped structure.

3. A sliding self-locking device for an injection molding machine as claimed in claim 1, Features: The height of the bottom surface of the second channel (313) increases first and then decreases from its head end to its tail end, and then tends to be flat. The second channel (313) is an arc-shaped structure, and the second channel (313) has a corner (3131).

4. A sliding self-locking device for an injection molding machine as claimed in claim 1, Features: The connecting member (1) has a cavity for the locking rod (2) to move, and the cavity of the connecting member (1) has an elastic element (4), one end of the elastic element (4) abuts against the connecting member (1) and the other end abuts against the locking rod (2).

5. A sliding self-locking device for an injection molding machine as claimed in claim 4, Features: The elastic element (4) is sleeved on the locking rod (2).

6. A sliding self-locking device for an injection molding machine as claimed in claim 1, Features: A second step surface (316) with a drop is formed between the tail end of the second channel (313) and the head end of the first channel (311).

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