Injection molding machine safety door structure, Injection molding machine

Abstract

The utility model provides a kind of injection molding machine safety door structure, injection molding machine, wherein injection molding machine safety door structure includes door body frame, fixed door and movable door, door body frame has upper and lower parallel interval arrangement's upper guide rail and lower guide rail, the top end and the bottom end of movable door are respectively through nylon roller one-to-one correspondingly slid and set up on upper guide rail and lower guide rail, injection molding machine safety door structure further includes grounding assembly, grounding assembly includes conducting bracket and the conducting brush of electric connection with conducting bracket, grounding assembly is electrically connected with movable door by conducting bracket, the head of conducting brush and lower guide rail stop resistance.The utility model can effectively prevent the occurrence of the deficiencies such as the short service life of joint due to the adoption of spring wire, the need for guide groove to prevent the spring wire from being squeezed when the door is opened and closed, the need for longer spring wire to result in higher cost when the opening space of movable door is larger, and the unstable door opening process caused by the elasticity of spring wire.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding machine design technology, specifically relating to an injection molding machine safety door structure and an injection molding machine. Background Technology

[0002] Most existing injection molding machine safety door designs involve sliding doors with nylon wheels mounted on guide rails for opening and closing. However, most lack effective grounding. This lack of grounding allows charge to accumulate on the door surface, potentially causing electrostatic discharge when a user's fingertips or body come into contact with it, resulting in a poor user experience. Furthermore, if low-voltage electrical components malfunction and leak current, significant safety hazards exist. To overcome these shortcomings, some technologies use grounding spring wires on the sliding door. However, this method has several drawbacks: the joints have a shorter lifespan due to prolonged tension; the spring wire requires guide grooves to prevent compression during opening and closing; longer spring wires are needed for larger opening spaces, increasing costs; and the spring wire's elasticity causes an unstable opening process (rapid backward movement at the beginning, followed by a reverse resistance at the end). Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a safety door structure and injection molding machine that can overcome the shortcomings of the existing injection molding machine safety door structure using spring wire grounding method, such as the short life of the joint under long-term tension, the need for guide grooves for the spring wire to prevent squeezing when opening and closing the door, the need for a long spring wire when the opening space of the movable door is large, resulting in high cost, and the spring wire having elasticity causing the door opening process to be unstable.

[0004] To address the aforementioned problems, this utility model provides a safety door structure for an injection molding machine, comprising a door frame, a fixed door, and a movable door. The door frame has an upper guide rail and a lower guide rail arranged parallel to each other. The top and bottom ends of the movable door are respectively slidably mounted on the upper and lower guide rails via nylon rollers. The safety door structure also includes a grounding component, which includes a conductive bracket and a conductive brush electrically connected to the conductive bracket. The grounding component is electrically connected to the movable door through the conductive bracket, and the head of the conductive brush abuts against the lower guide rail.

[0005] In some embodiments, the conductive brush is a copper wire brush, and the conductive brush is welded to the conductive support as a whole.

[0006] In some embodiments, the conductive support is threadedly connected to the movable door via a threaded connector.

[0007] In some embodiments, a puncture component is held between the threaded head of the threaded connector and the conductive support.

[0008] In some embodiments, the puncture component is a grounding washer.

[0009] In some embodiments, the head of the conductive brush abuts against the top surface of the lower guide rail from top to bottom along the height direction of the movable door.

[0010] In some embodiments, the conductive support has an elongated slot extending along the height direction of the movable door, and the threaded connector passes through the elongated slot to connect with the movable door.

[0011] In some embodiments, there are two threaded connectors, which are spaced apart along the height direction of the movable door and the maximum distance between them is less than the maximum length of the through groove.

[0012] In some embodiments, the nylon roller has a U-shaped annular groove arranged around its rolling axis, and the top surface of the lower guide rail is slidably fitted into the U-shaped annular groove.

[0013] This utility model also provides an injection molding machine, including an injection molding machine frame and the above-mentioned injection molding machine safety door structure, wherein the injection molding machine safety door structure is fixedly connected to the top surface of the injection molding machine frame via the door frame.

[0014] This utility model provides a safety door structure for an injection molding machine. By installing a grounding component consisting of a conductive bracket and a conductive brush on the movable door, the head of the conductive brush is connected to the lower guide rail in a stop-and-hold relationship. In this way, when an electric charge is generated on the movable door, it can be conducted to the lower guide rail through the conductive bracket and conductive brush, and finally to the ground through the injection molding machine frame. This effectively avoids discomfort and even safety hazards to the operator caused by an electrified movable door. It eliminates the need for the existing grounding method of setting a spring wire on the movable door, thereby effectively preventing the shortcomings of using a spring wire, such as short lifespan of the joint under long-term tension, the need for a guide groove for the spring wire to prevent compression during opening and closing, the need for a long spring wire when the movable door has a large opening space, resulting in higher costs, and the instability of the door opening process due to the elasticity of the spring wire. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram (including the injection molding machine frame) of the safety door structure of the injection molding machine in an embodiment of this utility model;

[0016] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0017] Figure 3yes Figure 1 A partial cross-sectional view of the grounding component.

[0018] The reference numerals in the attached figures are as follows:

[0019] 1. Door frame; 11. Lower guide rail; 2. Fixed door; 3. Movable door; 31. Nylon roller; 4. Grounding assembly; 41. Conductive bracket; 411. Long through groove; 42. Conductive brush; 5. Threaded connector; 6. Puncture component; 100. Injection molding machine frame. Detailed Implementation

[0020] See also Figures 1 to 3 As shown in the figure, according to an embodiment of the present invention, a safety door structure for an injection molding machine is provided, including a door frame 1, a fixed door 2, and a movable door 3. The door frame 1 is fixedly installed on the top surface of the injection molding machine frame 100. The door frame 1 has an upper guide rail (not labeled in the figure) and a lower guide rail 11 arranged parallel to each other. The top and bottom ends of the movable door 3 are respectively slidably mounted on the upper and lower guide rails 11 via nylon rollers 31. It is understood that the position of the fixed door 2 relative to the door frame 1 and the injection molding machine frame 100 remains unchanged, while the movable door 3 can be driven to move linearly back and forth along the guiding direction of the upper and lower guide rails 11, thereby realizing the opening and closing operation of the injection molding machine. The bottom end of the movable door 3 is slidably (rolling) connected to the lower guide rail 11 via nylon rollers 31, and the top end of the movable door 3 is also slidably connected to the upper guide rail via corresponding nylon rollers 31. The nylon rollers 31 have… While possessing high structural strength, it also exhibits high smoothness. Furthermore, the nylon rollers 31 have a relatively small mass, allowing for a relatively small overall mass of the movable door 3. However, since the nylon rollers 31 are non-conductive, the charge generated on the movable door 3 (static electricity or leakage from electrical components) cannot be further conducted to the injection molding machine frame 100 below via the lower guide rail 11 to achieve grounding. Based on the aforementioned shortcomings, this utility model proposes that the injection molding machine safety door structure also include a grounding component 4. The grounding component 4 includes a conductive bracket 41 and a conductive brush 42 electrically connected to the conductive bracket 41. The grounding component 4 is electrically connected to the movable door 3 via the conductive bracket 41. The head of the conductive brush 42 abuts against the lower guide rail 11 (i.e., the head of the conductive brush 42 contacts the lower guide rail 11), thus forming an electrical connection between the two. It is understood that the aforementioned movable door 3 and lower guide rail 11 are made of conductive metal materials such as stainless steel.

[0021] In this technical solution, a grounding component 4 consisting of a conductive bracket 41 and a conductive brush 42 is installed on the movable door 3. The head of the conductive brush 42 is connected to the lower guide rail 11 to form a stop connection. In this way, when an electric charge is generated on the movable door 3, it can be conducted to the lower guide rail 11 through the conductive bracket 41 and the conductive brush 42, and finally to the ground through the injection molding machine frame 100. This effectively avoids the discomfort or even safety hazards caused to the operator by the movable door 3 being electrified. It eliminates the need to use the grounding method of setting a spring wire on the movable door 3 in the existing technology. This effectively avoids the shortcomings caused by using a spring wire, such as short life of the joint under long-term tension, the need for a guide groove for the spring wire to prevent it from being squeezed when opening and closing the door, the need for a long spring wire when the movable door has a large opening space, resulting in higher cost, and the spring wire having elasticity, resulting in an unstable opening process.

[0022] In one specific embodiment, the conductive brush 42 is a copper wire brush. Specifically, the conductive brush 42 can be integrated with the conductive support 41 via a threaded connection. For example, the conductive brush 42 includes bristles (not labeled in the figure) and a gathering cover (not labeled in the figure). The gathering cover is clamped to one end of each bristle, thus forming a single integrated brush. In this case, the gathering cover is threadedly connected to the conductive support 41. In a preferred embodiment, the conductive brush 42 and the conductive support 41 are welded together, ensuring a reliable electrical conduction connection between the conductive support 41 and the conductive brush 42. Using a copper wire brush can further reduce the manufacturing cost of the grounding component 4; commercially available copper wire brushes can be used.

[0023] In some embodiments, the conductive bracket 41 and the movable door 3 can be reliably electrically connected by welding. However, in actual production, the manufacturing of the movable door 3 and the conductive bracket 41 are objectively carried out by different processing techniques, i.e., by different production units. Thus, in actual production, the movable door 3 and the conductive bracket 41 are manufactured independently and then assembled. If welding is used, it is quite troublesome. Therefore, as a preferred embodiment, the conductive bracket 41 and the movable door 3 are connected by a threaded connector 5. The aforementioned threaded connector 5 can be, for example, a screw. This makes the assembly of the grounding component 4 and the movable door 3 simple and easy.

[0024] As mentioned above, since the conductive bracket 41 is manufactured independently, in general processing, when the conductive bracket 41 is completed, its outer surface will be sprayed with anti-rust paint. In order to ensure reliable conductivity when it is assembled with the movable door 3, a piercing component 6 is clamped between the threaded head of the threaded connector 5 and the conductive bracket 41. The aforementioned piercing component 6 can be a grounding washer. In a specific embodiment, the grounding washer is a claw-shaped washer (DIN 6795 grounding washer). Of course, star-tooth washers or serrated locking washers can also be used. In this technical solution, by clamping the aforementioned piercing component 6 between the threaded connector 5 and the conductive bracket 41, the insulating layer (the aforementioned anti-rust paint) on the outer surface of the conductive bracket 41 can be pierced, thereby ensuring that the charge on the movable door 3 is reliably conducted to the conductive bracket 41. It can be understood that the charge conduction path is: movable door 3 - threaded hole matching the threaded connector 5 - threaded connector 5 - piercing component 6 - conductive bracket 41 - conductive brush 42 - lower guide rail 11 - injection molding machine frame 100 - ground.

[0025] In some implementation methods, see details. Figure 3 As shown, the head of the conductive brush 42 abuts against the top surface of the lower guide rail 11 from top to bottom along the height direction of the movable door 3.

[0026] In some implementation methods, see details. Figure 2 As shown, the conductive bracket 41 has a long through groove 411 extending along the height direction of the movable door 3, and the threaded connector 5 passes through the long through groove 411 and connects to the movable door 3.

[0027] In this technical solution, the aforementioned long through groove 411 can also be called a waist-shaped hole. In this way, the height of the conductive brush 42 can be adjusted by adjusting the relative height between the threaded connector 5 and the long through groove 411. On the one hand, the contact force between the conductive brush 42 and the lower guide rail 11 can be adjusted to ensure the smooth opening and closing of the movable door 3. On the other hand, the height of the conductive brush 42 can be reduced after the conductive brush 42 is severely worn and affects reliable conductivity, thereby improving the service life of the conductive brush 42.

[0028] In some embodiments, there are two threaded connectors 5, which are spaced apart along the height direction of the movable door 3, and the maximum distance between them is less than the maximum length of the long through groove 411. Using two threaded connectors 5 spaced apart vertically ensures both the height adjustment of the conductive brush 42 and the reliable and stable position of the grounding component 4, preventing the conductive bracket 41 from tilting or swinging around the threaded connector 5 during use when a single threaded connector 5 is fastened to it. In one specific embodiment, the conductive bracket 41 is an L-shaped bracket, specifically formed by bending sheet metal, resulting in a simple structure and low cost.

[0029] See further Figure 2 As shown, in some embodiments, the nylon roller 31 has a U-shaped annular groove (not indicated in the figure) arranged around its rolling axis, and the top surface of the lower guide rail 11 is slidably fitted into the U-shaped annular groove. In this way, the position of the movable door 3 can be restricted by the groove limiting effect between the U-shaped annular groove and the top surface of the lower guide rail 11, so as to ensure smooth opening and closing of the movable door 3.

[0030] According to an embodiment of the present invention, an injection molding machine is also provided, including an injection molding machine frame 100 and the above-mentioned injection molding machine safety door structure, wherein the injection molding machine safety door structure is fixedly connected to the top surface of the injection molding machine frame 100 via the door frame 1.

[0031] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A safety door structure for an injection molding machine, comprising a door frame (1), a fixed door (2), and a movable door (3), wherein the door frame (1) has an upper guide rail and a lower guide rail (11) arranged parallel to each other vertically, and the top and bottom ends of the movable door (3) are respectively slidably mounted on the upper guide rail and the lower guide rail (11) via nylon rollers (31), characterized in that, It also includes a grounding component (4), which includes a conductive bracket (41) and a conductive brush (42) electrically connected to the conductive bracket (41). The grounding component (4) is electrically connected to the movable door (3) through the conductive bracket (41), and the head of the conductive brush (42) abuts against the lower guide rail (11).

2. The injection molding machine safety door structure according to claim 1, characterized in that, The conductive brush (42) is a copper wire brush, and the conductive brush (42) is welded to the conductive support (41) as a whole.

3. The injection molding machine safety door structure according to claim 2, characterized in that, The conductive bracket (41) and the movable door (3) are threadedly connected by a threaded connector (5).

4. The injection molding machine safety door structure according to claim 3, characterized in that, The threaded connector (5) has a piercing component (6) clamped between the threaded head and the conductive support (41).

5. The injection molding machine safety door structure according to claim 4, characterized in that, The puncture component (6) is a grounding washer.

6. The injection molding machine safety door structure according to claim 3, characterized in that, The head of the conductive brush (42) abuts against the top surface of the lower guide rail (11) from top to bottom along the height direction of the movable door (3).

7. The injection molding machine safety door structure according to claim 6, characterized in that, The conductive bracket (41) has a long through groove (411) extending along the height direction of the movable door (3), and the threaded connector (5) passes through the long through groove (411) and connects to the movable door (3).

8. The injection molding machine safety door structure according to claim 7, characterized in that, The threaded connector (5) has two parts, which are spaced apart along the height direction of the movable door (3) and the maximum distance between them is less than the maximum length of the long through groove (411).

9. The safety door structure of the injection molding machine according to claim 1, characterized in that, The nylon roller (31) has a U-shaped annular groove arranged around its rolling axis, and the top surface of the lower guide rail (11) is slidably fitted into the U-shaped annular groove.

10. An injection molding machine, characterized in that, The injection molding machine includes an injection molding machine frame (100) and an injection molding machine safety door structure as described in any one of claims 1 to 9, wherein the injection molding machine safety door structure is fixedly connected to the top surface of the injection molding machine frame (1) via the door frame (1).

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