A protective device for maintaining the mold joint area of ​​an injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, and discloses a protective device for maintaining a mold joint area of ​​an injection molding machine, comprising a fixed protective door arranged around the mold joint area and a movable protective door which slides relative to the fixed protective door to open or close the mold joint area, a spring-opening structure for preventing the movable protective door from being accidentally closed is arranged between the fixed protective door and the movable protective door, and the protective device for maintaining the mold joint area of ​​the injection molding machine prevents the movable protective door from being accidentally closed when personnel maintain the machine, thereby ensuring the safety of personnel entering the machine.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a protective device for maintaining a mold joint area of ​​an injection molding machine. Background Art

[0002] The injection molding machine is equipped with a protective device in the mold joint area. The protective device includes a fixed protective door arranged around the mold joint area and a movable protective door that slides relative to the fixed protective door to expose or block the mold joint area. When the injection molding machine is operating normally, the protective device needs to be closed due to the mechanical movement of the joint area. For details, refer to Figure 1 When the machine is under maintenance or personnel need to enter for maintenance, the protective door can be moved by sliding to expose the mold joint area. For details, refer to Figure 2 .

[0003] The existing problem is that during maintenance, there is a risk that when maintenance personnel enter the machine, the protective device is accidentally closed, and external operators mistakenly believe that the equipment is normal and thus operate it incorrectly. Utility Model Content

[0004] The utility model aims at the disadvantage of the prior art that the maintenance personnel are at risk of being injured due to the accidental closure of the protective device, and provides a protective device for maintaining the mold joint area of ​​an injection molding machine.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A protective device for maintaining a mold joint area of ​​an injection molding machine comprises a fixed protective door arranged around the mold joint area and a movable protective door which slides relative to the fixed protective door to open or close the mold joint area, and a spring-opening structure is arranged between the fixed protective door and the movable protective door to prevent the movable protective door from being accidentally closed.

[0007] Compared with the prior art in which the maintenance personnel are at risk of injury due to accidental closure of the protective device, the above-mentioned solution is adopted. In the utility model, a spring-opening structure is provided to prevent the movable protective door from being accidentally closed, thereby ensuring the safety of personnel entering the machine.

[0008] Preferably, the pop-up structure includes a spring sheet that can be spread out flat or folded at 90 degrees, one end of the spring sheet is fixed on the mobile protective door and the other end of the spring sheet extends out of the mobile protective door. When the mobile protective door approaches the fixed protective door, the end of the spring sheet away from the mobile protective door abuts against the fixed protective door. At this time, the fixed protective door and the mobile protective door are clearance-matched.

[0009] By adopting the above scheme, when the mobile protective door approaches the fixed protective door, the end of the spring sheet away from the mobile protective door abuts against the fixed protective door. At this time, the gap between the fixed protective door and the mobile protective door is matched. Under the premise that there is no external force to move the spring sheet, the mobile protective door always remains in an open state, thereby preventing the mobile protective door from closing accidentally.

[0010] Preferably, the spring sheet comprises two metal sheets hinged by an axis and a torsion spring sleeved on the axis and connected to the two metal sheets at both ends; when the torsion spring is in an initial state, the two metal sheets are spread out flat.

[0011] When adopting the above scheme, when closing the movable protective door, you must first move the metal sheet away from the side of the movable protective door so that the two metal sheets are gathered at 90 degrees. The deformation of the torsion spring produces a restoring elastic force. When the external force is removed, under the action of the restoring elastic force of the torsion spring, the two metal sheets automatically spread out, driving the movable protective door to open.

[0012] Preferably, at least one group of pop-up structures is longitudinally spaced apart between the fixed protective door and the movable protective door.

[0013] By adopting the above scheme, one group can ensure that the mobile protective door always remains open without external force. Multiple groups can be set to increase the force of the spring-opening and further improve safety.

[0014] Preferably, a locking structure is provided between the fixed protective door and the movable protective door for locking the two after the spring sheet is pushed to put them in a retracted state.

[0015] By adopting the above scheme, when the staff completes the maintenance, they push the spring piece away from the side of the movable protective door to retract it to 90 degrees, slide the movable protective door to close it, and limit the separation of the fixed protective door and the movable protective door through the locking structure.

[0016] Preferably, the locking structure includes a mounting plate extending to both the fixed protective door and the movable protective door, at least one first fastening bolt passing through the mounting plate and connected to the fixed protective door, and at least one second fastening bolt passing through the mounting plate and connected to the movable protective door.

[0017] By adopting the above scheme, the first fastening bolt passes through the mounting plate and is connected to the fixed protective door, and the mounting plate is installed on the fixed protective door. The other end of the mounting plate is located outside the fixed protective door. When the mobile protective door is closed, the end of the mounting plate away from the fixed protective door is opposite to the mobile protective door, and the second fastening bolt passes through the mounting plate and is connected to the mobile protective door, thereby limiting the separation of the fixed protective door and the mobile protective door.

[0018] Preferably, the movable protective door is provided with rollers for easy movement.

[0019] By adopting the above solution, the roller reduces the resistance of the mobile protective door when it moves, making it easier to move.

[0020] The utility model adopts the above technical scheme, and has significant technical effects: when the movable protective door is closed, the two metal sheets are gathered at 90 degrees, and the torsion spring is deformed to have a restoring elastic force, and after the second fastening bolt is removed, the resistance disappears, and the torsion spring resets and drives the metal sheets to spread out, driving the movable protective door to open, and due to the existence of the spring-opening structure, the movable protective door is always in an open state, avoiding accidental closure of the movable protective door, thereby ensuring the safety of people entering the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a protective device for maintenance of a mold joint area of ​​an injection molding machine in the prior art when it is closed;

[0022] Figure 2 It is a schematic diagram of the prior art when the protective device for maintenance of the mold joint area of ​​the injection molding machine is opened;

[0023] Figure 3 This is an isometric view of an injection molding machine with a protective device for maintenance of a mold joint area opened in an embodiment;

[0024] Figure 4 yes Figure 3 A in the enlarged view;

[0025] Figure 5 It is a partial enlarged view of a protective device for maintenance of a mold joint area of ​​an injection molding machine in an embodiment when it is closed;

[0026] Figure 6 is an axonometric view of the pop-up structure in the embodiment when it is unfolded;

[0027] Figure 7 is an axonometric view of the pop-up structure of the embodiment when it is folded;

[0028] Figure 8 It is a schematic diagram of the pop-up structure in the embodiment when it is installed on the movable protective door and folded.

[0029] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. Fixed protective door; 2. Movable protective door; 3. Spring; 4. Shaft; 5. Metal sheet; 6. Torsion spring; 7. Mounting plate; 8. First fastening bolt; 9. Second fastening bolt. DETAILED DESCRIPTION

[0030] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] Example

[0032] A protective device for maintaining the mold joint area of ​​an injection molding machine, referring to Figures 3 to 8 , including a fixed protective door 1, which is arranged around the mold joint area, and also includes a movable protective door 2, which can open or close the protective area. A pop-up structure is arranged between the fixed protective door 1 and the movable protective door 2, and the pop-up structure can prevent the movable protective door 2 from closing accidentally, thereby ensuring the safety of people entering the machine.

[0033] The spring-opening structure includes a spring sheet 3, which can be spread out flat or folded at 90 degrees. The spring sheet 3 includes two metal sheets 5, which are hinged by a shaft 4 to achieve the spread out flat or folded at 90 degrees. A torsion spring 6 is sleeved on the shaft 4, and the two ends of the torsion spring 6 are respectively connected to the two metal sheets 5. When the torsion spring 6 is in the initial state, the two metal sheets 5 are spread out flat. A metal sheet 5 is fixed on the movable protective door 2, and the other metal sheet 5 extends out of the movable protective door 2. When the movable protective door 2 approaches the fixed protective door 1, the end of the metal sheet 5 not fixed on the movable protective door 2 away from the movable protective door 2 abuts against the fixed protective door 1. At this time, the fixed protective door 1 and the movable protective door 2 are clearance-matched. When closing the movable protective door 2, you must first move the metal sheet 5 away from the side of the movable protective door 2 so that the two metal sheets 5 are retracted at 90°, and the torsion spring 6 is deformed to produce a restoring elastic force. When the external force is removed, under the action of the restoring elastic force of the torsion spring 6, the two metal sheets 5 are automatically spread out to drive the movable protective door 2 to open. Therefore, under the premise that there is no external force to move the spring sheet 3, the movable protective door 2 always remains in an open state, thereby avoiding accidental closing of the movable protective door 2.

[0034] At least one group of pop-up structures is provided between the fixed protective door 1 and the movable protective door 2. Setting one group can ensure that the movable protective door 2 always remains in an open state without external force. Setting multiple groups can increase the pop-up force and further improve safety. In this embodiment, one group is provided and is arranged below the fixed protective door 1 and the movable protective door 2 to reduce obstruction.

[0035] A locking structure is provided between the fixed protective door 1 and the movable protective door 2. When the staff completes the inspection, they manually push the spring sheet 3 away from the side of the movable protective door 2 to close it at 90 degrees, slide the movable protective door 2 to close it, and limit the separation of the fixed protective door 1 and the movable protective door 2 through the locking structure. The locking structure includes a mounting plate 7 extending to both the fixed protective door 1 and the movable protective door 2, at least one first fastening bolt 8 connected to the fixed protective door 1 after passing through the mounting plate 7, and at least one second fastening bolt 9 connected to the movable protective door 2 after passing through the mounting plate 7. The mounting plate 7 is provided with first through holes that are the same in number as the first fastening bolts 8 and are passed through by the first fastening bolts 8, and second through holes that are the same in number as the second fastening bolts 9 and are passed through by the second fastening bolts 9. The fixed protective door 1 is provided with first threaded holes that are the same in number as the first fastening bolts 8 and are threadedly matched with the first fastening bolts 8, and the movable protective door 2 is provided with second threaded holes that are the same in number as the second fastening bolts 9 and are threadedly matched with the second fastening bolts 9. In this embodiment, two first fastening bolts 8, first through holes and first threaded holes are provided, and one second fastening bolt 9, second through holes and second threaded holes are provided. The first fastening bolt 8 passes through the first through hole and cooperates with the first threaded hole to install the mounting plate 7 on the fixed protective door 1. The other end of the mounting plate 7 is located outside the fixed protective door 1. When the mobile protective door 2 is closed, the end of the mounting plate 7 away from the fixed protective door 1 is opposite to the mobile protective door 2, that is, the second through hole is opposite to the second threaded hole. The second fastening bolt 9 passes through the second through hole and cooperates with the second threaded hole, thereby limiting the separation of the fixed protective door 1 and the mobile protective door 2. The first through hole, the second through hole, the first threaded hole and the second threaded hole are all prior art, which are not marked in the figure and will not be described here.

[0036] The movable protective door 2 is provided with rollers, which reduce the resistance of the movable protective door 2 when it moves, and facilitate the sliding of the movable protective door 2. The rollers are prior art, are not marked in the figure, and are not described here.

Claims

1. A protective device for maintaining a mold joint area of ​​an injection molding machine, comprising a fixed protective door (1) arranged around the mold joint area and a movable protective door (2) sliding relative to the fixed protective door (1) to open or close the mold joint area, characterized in that: A spring-opening structure is provided between the fixed protective door (1) and the movable protective door (2) to prevent the movable protective door (2) from closing accidentally. The spring-opening structure comprises a spring sheet (3) which can be spread out flat or folded at 90 degrees. One end of the spring sheet (3) is fixed on the movable protective door (2) and the other end of the spring sheet (3) extends out of the movable protective door (2). When the movable protective door (2) approaches the fixed protective door (1), the end of the spring sheet (3) away from the movable protective door (2) abuts against the fixed protective door (1). At this time, the fixed protective door (1) and the movable protective door (2) are clearance-matched.

2. A protective device for maintaining the mold joint area of ​​an injection molding machine according to claim 1, characterized in that: The spring sheet (3) comprises two metal sheets (5) hingedly connected by a shaft (4) and a torsion spring (6) sleeved on the shaft (4) and connected to the two metal sheets (5) at both ends. When the torsion spring (6) is in an initial state, the two metal sheets (5) are spread out flat.

3. A protective device for maintaining the mold joint area of ​​an injection molding machine according to claim 1, characterized in that: At least one group of spring-opening structures is longitudinally spaced apart between the fixed protection door (1) and the movable protection door (2).

4. A protective device for maintaining the mold joint area of ​​an injection molding machine according to claim 1, characterized in that: A locking structure is provided between the fixed protection door (1) and the movable protection door (2) for locking the two doors after the spring sheet (3) is moved to put them in a retracted state.

5. A protective device for maintaining the mold joint area of ​​an injection molding machine according to claim 4, characterized in that: The locking structure comprises a mounting plate (7) extending to both the fixed protective door (1) and the movable protective door (2), at least one first fastening bolt (8) passing through the mounting plate (7) and connected to the fixed protective door (1), and at least one second fastening bolt (9) passing through the mounting plate (7) and connected to the movable protective door (2).

6. The protective device for maintaining the mold joint area of ​​an injection molding machine according to claim 1, characterized in that: The movable protective door (2) is provided with rollers for easy movement.

Images