Modular split protective door and hot plate plastic welding machine comprising same

Abstract

The utility model relates to the technical field of plastic welding machine manufacturing, in particular to a modular split protective door and a hot plate plastic welding machine comprising the same. According to the modular split protective door, the door frame is detachably fixed to the hot plate plastic welding machine rack and serves as a common installation foundation of the upper sliding door, the lower sliding door, the guide assembly and the power part. And under the synergistic action of the power part and the guide assembly, the upper sliding door and the lower sliding door perform the opposite / opposite displacement movement under the action of the directional dragging force. Thus, on one hand, the modular split protective door is formed in a prefabrication workshop, and overall assembly is easy to realize, so that the field installation time and workload of the modular split protective door are effectively reduced, and meanwhile, quality control and debugging of the modular split protective door are facilitated; and on the other hand, in the closing and opening processes, the upper sliding door and the lower sliding door independently execute directional sliding motion, and extra horizontal space is not occupied.

Description

A modular double-leaf security door and a hot plate plastic welding machine including it. Technical Field

[0001] This utility model relates to the field of plastic welding machine manufacturing technology, and in particular to a modular double-leaf protective door and a hot plate plastic welding machine including the door. Background Technology

[0002] In the field of plastic product welding and processing, hot plate plastic welding machines have become key equipment in industrial production due to their high welding efficiency. During equipment operation, the high-temperature hot plate and high-speed moving parts create a dangerous area, and operators may face risks such as burns and mechanical injuries if they are not careful. Therefore, equipping the machine with protective doors is an important means to ensure safe production.

[0003] In the current state of the industry, protective doors for hot plate welding machines mostly adopt traditional structures with on-site decentralized assembly, such as single doors or hinged double doors. This method requires the installation of door frames, door panels, hinges, and other components one by one on-site. Due to limitations such as workshop space, personnel skill level, and assembly tools, the installation process is not only time-consuming and labor-intensive, increasing labor costs and equipment debugging cycles, but also makes it difficult to guarantee installation accuracy, resulting in a significant reduction in protective function and even creating potential safety hazards.

[0004] Furthermore, as industrial production develops towards large-scale and high-efficiency operations, higher demands are placed on the installation efficiency, reliability, and ease of maintenance of protective doors for hot plate welding machines. How to overcome the limitations of traditional on-site, decentralized assembly of protective doors and develop a protective door structure that can be prefabricated in a workshop and assembled as a whole has become a pressing technical challenge for the industry. Summary of the Invention

[0005] This utility model discloses a modular double-leaf protective door for hot plate plastic welding machines, which aims to solve the problems of low efficiency, poor installation accuracy and difficult maintenance of existing hot plate plastic welding machine protective door on-site decentralized assembly schemes.

[0006] This utility model relates to a modular double-leaf safety door used to isolate operators from hazardous areas. It includes a door frame, an upper sliding door, a lower sliding door, a guide assembly, and a power unit. The door frame is detachably fixed to the front side of the hot plate welding machine frame and serves as a shared mounting base for the upper and lower sliding doors, the guide assembly, and the power unit. With the coordinated action of the power unit and the guide assembly, the upper and lower sliding doors perform opposite / reverse displacement movements due to directional drag forces.

[0007] As a further improvement to the technical solution disclosed in this utility model, the door frame includes an upper side beam, a left side beam, a lower side beam, a right side beam, a left-side extended load-bearing member, and a right-side extended load-bearing member. The upper side beam, left side beam, lower side beam, and right side beam are sequentially assembled and welded to form a frame structure. The left-side extended load-bearing member serves as a connecting transition between the left side beam and the hot plate plastic welding machine frame. Multiple left-side extended load-bearing members are welded and fixed to the left side beam and are arranged linearly along the length of the left side beam. The right-side extended load-bearing member serves as a connecting transition between the right side beam and the hot plate plastic welding machine frame. Multiple right-side extended load-bearing members are welded and fixed to the right side beam and are arranged linearly along the length of the right side beam.

[0008] As a further improvement to the technical solution disclosed in this utility model, the power unit includes a left-side actuator and a right-side actuator. The left-side actuator is used to drive the lower sliding door, and it is supported by two adjacent left-side extended load-bearing members. The right-side actuator is used to drive the upper sliding door, and it is supported by two adjacent right-side extended load-bearing members.

[0009] As a further improvement to the technical solution disclosed in this utility model, both the left-hand actuator and the right-hand actuator are preferably pneumatic linear actuators.

[0010] As a further improvement to the technical solution disclosed in this utility model, the guide assembly includes a left guide rod, a left upper sliding member, a left lower sliding member, a right guide rod, a right upper sliding member, and a right lower sliding member. The left and right guide rods are parallel to each other, and both are supported by an upper side beam and a lower side beam. The left upper and left lower sliding members are fitted onto the left guide rod, while the right upper and right lower sliding members are fitted onto the right guide rod. The left upper and right upper sliding members both use the rear side wall of the upper sliding door as a detachable installation base. The left lower sliding member and right lower sliding member both use the rear side wall of the lower sliding door as a detachable installation base.

[0011] As a further improvement to the technical solution disclosed in this utility model, the modular double-leaf protective door is also equipped with a photoelectric safety light curtain. During the process of the upper sliding door and the lower sliding door moving in opposite directions to close, the photoelectric safety light curtain monitors in real time whether there are personnel or objects entering the danger zone.

[0012] As a further improvement to the technical solution disclosed in this utility model, the photoelectric safety light curtain includes a left-side load-bearing beam, a right-side load-bearing beam, a light emitter, and a light receiver. The left-side load-bearing beam serves as the mounting base for the light emitter and is detachably fixed to the front side of the hot plate plastic welding machine frame, completely obscuring the left-side beam. The right-side load-bearing beam serves as the mounting base for the light receiver and is detachably fixed to the front side of the hot plate plastic welding machine frame, completely obscuring the right-side beam.

[0013] As a further improvement to the technical solution disclosed in this utility model, the photoelectric safety light curtain also includes a left protective cover and a right protective cover. The left protective cover is used to cover and protect the light emitter, and it is fixed to the left load-bearing beam. The right protective cover is used to cover and protect the light receiver, and it is fixed to the right load-bearing beam.

[0014] Furthermore, this utility model also discloses a hot plate plastic welding machine, which includes the aforementioned modular double protective door.

[0015] In practical applications, the modular double-leaf safety door disclosed in this utility model can achieve at least the following beneficial technical effects, specifically:

[0016] 1) The modular double-leaf protective doors are formed in the prefabrication workshop and assembled as a whole onto the frame of the hot plate plastic welding machine. This can effectively reduce the on-site installation time and workload of the modular double-leaf protective doors, shorten the overall assembly cycle of the hot plate plastic welding machine, and facilitate quality control of the protective doors.

[0017] 2) Thanks to the detachable installation method of the door frame, when maintenance operations are required on the modular double-leaf security door, it can be easily and quickly disassembled and replaced as a whole, which can significantly reduce maintenance costs and downtime.

[0018] 3) During the closing and opening process, both the upper and lower sliding doors perform directional sliding movements independently without occupying additional horizontal space. For workshops with limited space, this design can make better use of space. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is a three-dimensional schematic diagram of the hot plate plastic welding machine disclosed in this utility model.

[0021] Figure 2 is also a three-dimensional schematic diagram of the hot plate plastic welding machine disclosed in this utility model (with the photoelectric safety light curtain hidden).

[0022] Figure 3 is a three-dimensional schematic diagram of the modular double-leaf protective door disclosed in this utility model.

[0023] Figure 4 is a front view of Figure 3 (with the hidden lines visible).

[0024] Figure 5 is a three-dimensional schematic diagram of the door frame in the modular double-leaf protective door disclosed in this utility model.

[0025] Figure 6 is a three-dimensional schematic diagram of the photoelectric safety light curtain disclosed in this utility model.

[0026] 1-Frame; 2-Modular double-leaf protective door; 21-Door frame; 211-Upper side beam; 212-Left side beam; 213-Lower side beam; 214-Right side beam; 215-Left extended load-bearing component; 216-Right extended load-bearing component; 22-Upper sliding door; 23-Lower sliding door; 24-Guide assembly; 241-Left guide rod; 242-Left upper sliding component; 243-Left lower sliding component; 244-Right guide rod; 245-Right upper sliding component; 246-Right lower sliding component; 25-Power unit; 251-Left cylinder; 252-Right cylinder; 3-Photoelectric safety light curtain; 31-Left load-bearing beam; 32-Right load-bearing beam; 33-Left protective cover; 34-Right protective cover. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "left", "right", "front", "back", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Hot plate plastic welding machine is a device that uses a heating plate to heat and soften plastic parts, and then applies pressure to weld them together. It is widely used in the field of plastic product manufacturing.

[0029] The following detailed description of the present invention, in conjunction with specific embodiments, illustrates the invention. Figures 1 and 2 show three-dimensional schematic diagrams of the hot plate plastic welding machine in two different states. It can be seen that the machine mainly consists of a frame 1, a heating system, a power system, molds and fixtures, a control system, modular double-leaf protective doors 2, and a photoelectric safety light curtain 3. The frame 1, serving as the basic framework of the hot plate plastic welding machine, is generally made of high-strength steel, providing stable support for all components. The heating system includes a heating plate and a temperature control system. The power system provides power to the equipment to drive the workpiece and heating plate to perform displacement movements. The molds and fixtures are customized according to the product and are used to fix the workpiece to be welded. The control system uses a programmable logic controller (PLC) as its core, combined with a touch screen, sensors, etc., to achieve automated control and adjustment of parameters such as temperature, pressure, and time during the welding process. The modular double-leaf protective doors 2 effectively isolate high-temperature components and moving mechanisms during the welding process, preventing burns and injuries from mechanical parts to operators, while also facilitating the placement and removal of workpieces before and after welding.

[0030] Figure 3 shows a perspective view of the modular double-leaf protective door disclosed in this utility model. It can be seen that the modular double-leaf protective door 2 mainly consists of a door frame 21, an upper sliding door 22, a lower sliding door 23, a guide assembly 24, and a power unit 25. The door frame 21 is detachably fixed to the front side of the frame 1 and serves as a shared mounting base for the upper sliding door 22, the lower sliding door 23, the guide assembly 24, and the power unit 25. In practical applications, with the coordinated action of the power unit 25 and the guide assembly 24, the upper sliding door 22 and the lower sliding door 23 undergo opposite / reverse displacement movements due to directional drag force, thereby closing / opening the internal operating space.

[0031] As shown in Figure 3, the modular double-leaf protective door 2 has an integrated structure. It is formed in the prefabrication workshop and assembled as a whole onto the frame 1. In this way, on the one hand, the on-site installation time and workload of the modular double-leaf protective door are effectively reduced, which helps to shorten the overall assembly cycle of the hot plate plastic welding machine and also facilitates quality control. On the other hand, when maintenance operations are required on the modular double-leaf protective door 2, it can be easily and quickly disassembled and replaced as a whole, which can significantly reduce maintenance costs and downtime.

[0032] It should also be noted that during the closing and opening process, both the upper sliding door 22 and the lower sliding door 23 independently perform directional sliding movements without occupying additional horizontal space. For workshops with limited space, this design can make better use of space.

[0033] As shown in Figure 5, the door frame 21 includes an upper side beam 211, a left side beam 212, a lower side beam 213, a right side beam 214, a left-side extended load-bearing member 215, and a right-side extended load-bearing member 216. The upper side beam 211, left side beam 212, lower side beam 213, and right side beam 214 are sequentially assembled and welded to form a frame structure. Multiple left-side extended load-bearing members 215 are welded and fixed to the left side beam 212, arranged linearly along the length of the left side beam 212. Multiple right-side extended load-bearing members 216 are welded and fixed to the right side beam 214, arranged linearly along the length of the right side beam 214. Thus, the multiple linearly arranged left-side and right-side extended load-bearing members 215 and 216 can serve as mounting points to facilitate the connection and fixation of the door frame 21 to the frame 1.

[0034] As shown in Figure 2, the left-side extended load-bearing member 215 serves as the connection between the left-side beam 212 and the frame 1. The right-side extended load-bearing member 216 serves as the connection between the right-side beam 214 and the frame 1. Both the left-side and right-side extended load-bearing members 215 and 216 have oblong holes for bolts to pass through. This significantly reduces installation and adjustment time while ensuring the installation accuracy of the modular double-leaf protective door 2, thereby improving installation efficiency.

[0035] It is known that, based on common design knowledge, the power unit 25 can be designed in various ways to achieve synchronous driving of the upper sliding door 22 and the lower sliding door 23. However, a simple, easy-to-implement, and extremely fast action response scheme is recommended here. Specifically, as shown in Figures 3 and 4, the power unit 25 mainly consists of a left-mounted cylinder 251 and a right-mounted cylinder 252. The left-mounted cylinder 251 directly drives the lower sliding door 23, and it is supported by two adjacent left-mounted extended load-bearing members 215. The right-mounted cylinder 252 drives the upper sliding door 22, and it is supported by two adjacent right-mounted extended load-bearing members 216. This fully utilizes the space around the door frame 21, saving space and making the overall structure of the modular double-leaf protective door 2 more compact.

[0036] As shown in Figures 3 and 4, in one preferred design, the guide assembly 24 mainly consists of several parts: a left guide rod 241, a left upper sliding member 242, a left lower sliding member 243, a right guide rod 244, a right upper sliding member 245, and a right lower sliding member 246. The left guide rod 241 and the right guide rod 244 are parallel to each other and are both supported by the upper side beam 211 and the lower side beam 213. The left upper sliding member 242 and the left lower sliding member 243 are fitted onto the left guide rod 241, while the right upper sliding member 245 and the right lower sliding member 246 are fitted onto the right guide rod 244. The left upper sliding member 242 and the right upper sliding member 245 both use the rear side wall of the upper sliding door 22 as a detachable installation base. Both the left-side lower sliding member 243 and the right-side lower sliding member 246 use the rear side wall of the lower sliding door 23 as a detachable installation base. In practical applications, the upper sliding door 22 and the lower sliding door 23 can slide directionally along the left guide rod 241 and the right guide rod 244, effectively avoiding shaking, deviation, or jamming during the sliding process. This ensures the smoothness and stability of the opening and closing of the upper sliding door 22 and the lower sliding door 23, thereby improving the performance of the modular double-leaf protective door 2.

[0037] The photoelectric safety light curtain 3 is used to form an infrared protective light curtain to prevent injury to workers and build a safety barrier. During the process of the upper sliding door 22 and the lower sliding door 23 moving in opposite directions to close, the photoelectric safety light curtain 3 monitors in real time whether any personnel or objects enter the hazardous area.

[0038] As shown in Figures 1 and 6, the photoelectric safety light curtain 3 mainly consists of several parts, including a left-side load-bearing beam 31, a right-side load-bearing beam 32, a light emitter, a light receiver, a left-side protective cover 33, and a right-side protective cover 34. The left-side load-bearing beam 31 serves as the mounting base for the light emitter and is detachably fixed to the front of the frame 1, completely obscuring the left-side beam 212. The left-side protective cover 33 covers and protects the light emitter, using the left-side load-bearing beam 31 as its mounting base. The right-side load-bearing beam 32 serves as the mounting base for the light receiver and is also detachably fixed to the front of the frame 1, completely obscuring the right-side beam 214. The right-side protective cover 34 covers and protects the light receiver, using the right-side load-bearing beam 32 as its mounting base. In this way, without occupying excessive additional space, the safety protection functions are integrated, making the overall structure of the hot plate plastic welding machine more compact and reasonable.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A modular double-leaf safety door for isolating operators from hazardous areas, characterized in that, It includes a door frame, an upper sliding door, a lower sliding door, a guide assembly, and a power unit; the door frame is detachably fixed to the front side of the hot plate plastic welding machine frame, and it serves as a common mounting base for the upper sliding door, the lower sliding door, the guide assembly, and the power unit; with the cooperation of the power unit and the guide assembly, the upper sliding door and the lower sliding door perform opposite / backward displacement movements due to the directional drag force.

2. The modular double-leaf protective door according to claim 1, characterized in that, The door frame includes an upper side beam, a left side beam, a lower side beam, a right side beam, a left-side extended load-bearing member, and a right-side extended load-bearing member. The upper side beam, the left side beam, the lower side beam, and the right side beam are sequentially assembled and welded to form a frame structure. The left-side extended load-bearing member serves as a connection and transition between the left side beam and the hot plate plastic welding machine frame. The left-side extended load-bearing member is welded and fixed to the left side beam, and there are multiple such members, which are arranged linearly along the length of the left side beam. The right-side extended load-bearing member serves as a connection and transition between the right side beam and the hot plate plastic welding machine frame. The right-side extended load-bearing member is welded and fixed to the right side beam, and there are multiple such members, which are arranged linearly along the length of the right side beam.

3. The modular double-leaf protective door according to claim 2, characterized in that, The power unit includes a left-side actuator and a right-side actuator; the left-side actuator is used to drive the lower sliding door, and it is supported by two adjacent left-side extended load-bearing members; the right-side actuator is used to drive the upper sliding door, and it is supported by two adjacent right-side extended load-bearing members.

4. The modular double-leaf protective door according to claim 3, characterized in that, Both the left-side actuator and the right-side actuator are pneumatic linear actuators.

5. The modular double-leaf protective door according to claim 2, characterized in that, The guide assembly includes a left guide rod, a left upper sliding member, a left lower sliding member, a right guide rod, a right upper sliding member, and a right lower sliding member; the left guide rod and the right guide rod are parallel to each other, and both are supported by the upper side beam and the lower side beam; the left upper sliding member and the left lower sliding member are fitted onto the left guide rod, while the right upper sliding member and the right lower sliding member are fitted onto the right guide rod; the left upper sliding member and the right upper sliding member both use the rear side wall of the upper sliding door as a detachable installation base; the left lower sliding member and the right lower sliding member both use the rear side wall of the lower sliding door as a detachable installation base.

6. The modular double-leaf protective door according to any one of claims 2-5, characterized in that, It is also equipped with a photoelectric safety light curtain; during the process of the upper sliding door and the lower sliding door moving in opposite directions to close, the photoelectric safety light curtain monitors in real time whether there are personnel or objects entering the danger zone.

7. The modular double-leaf protective door according to claim 6, characterized in that, The photoelectric safety light curtain includes a left-side load-bearing beam, a right-side load-bearing beam, a light emitter, and a light receiver. The left-side load-bearing beam serves as the mounting base for the light emitter and is detachably fixed to the front side of the hot plate plastic welding machine frame, completely obscuring the left-side beam. The right-side load-bearing beam serves as the mounting base for the light receiver and is detachably fixed to the front side of the hot plate plastic welding machine frame, completely obscuring the right-side beam.

8. The modular double-leaf protective door according to claim 7, characterized in that, The photoelectric safety light curtain also includes a left protective cover and a right protective cover; the left protective cover is used to cover and protect the light emitter, and it is fixed to the left load-bearing beam; the right protective cover is used to cover and protect the light receiver, and it is fixed to the right load-bearing beam.

9. A hot plate plastic welding machine, characterized in that, Including the modular double-leaf protective door as described in any one of claims 1-8.

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