A heat insulation protective cover for injection molding machines
By designing a heat insulation cover with a sliding connection and spring structure, the problem of complex disassembly of existing injection molding machine heat insulation covers has been solved, achieving efficient disassembly and assembly as well as safe heat insulation protection, thus improving the convenience and safety of injection molding machine maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO HUAWEI MASCH CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-03
AI Technical Summary
The existing heat insulation covers for injection molding machines are bulky, which makes installation and disassembly complicated, reduces production efficiency, and increases safety risks.
A heat insulation protective cover structure was designed, which includes a fixing plate, a first heat insulation cover, a second heat insulation cover, a locking block, a pull handle, and a spring. Through sliding connection and the action of the spring, a simple disassembly and assembly process is achieved, reducing the reliance on tools.
It simplifies the disassembly and installation process of the heat shield, improves work efficiency, reduces safety risks, and enhances the convenience and safety of operation.
Smart Images

Figure CN224446655U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding machine technology, and more specifically, to a heat insulation protective cover for injection molding machines. Background Technology
[0002] Injection molding machines, also known as injection molding machines or injection presses, are key pieces of equipment used to manufacture various shapes of plastic products through plastic molds. They are suitable for processing thermoplastic and thermosetting plastics and are mainly divided into three types: vertical, horizontal, and all-electric. Injection molding machines heat the plastic and apply high pressure, causing the molten plastic to be injected into the mold cavity for molding. The barrel section of the injection molding machine is usually equipped with heating coils to ensure the plastic remains molten; therefore, a heat insulation shield is required to prevent heat loss and burns to operators.
[0003] The current heat insulation protective cover is large in size, making its installation and disassembly process extremely complicated and time-consuming. It is very inconvenient to maintain or clean the barrel of the injection molding machine, because the protective cover must be removed before maintenance can be performed. The disassembly process not only significantly reduces the overall production efficiency of the injection molding machine, but also increases the workload and technical requirements of the operators. The complicated disassembly and assembly process may also cause safety problems, such as increasing the risk of accidental injury, or weakening the protective effect due to improper assembly. Utility Model Content
[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a heat insulation protective cover for injection molding machines.
[0005] A heat insulation protective cover for an injection molding machine includes a fixed plate, a first heat insulation cover, a second heat insulation cover, a first locking block, a first pull handle, a first spring, a fixed frame, a transparent plate, and a locking assembly. There are two fixed plates, symmetrically arranged on the left and right sides. The first and second heat insulation covers are slidably connected between the fixed plates, and the first and second heat insulation covers are in close contact with each other. Two first locking blocks are slidably connected to the left and right sides of each of the two fixed plates. A first pull handle is connected to each first locking block, and the first pull handle penetrates through the fixed plate. A first spring is connected between each first locking block and the fixed plate. A fixed frame and a locking assembly are connected to the side of the first and second heat insulation covers that are furthest from each other. A transparent plate is connected inside each fixed frame.
[0006] As a further preferred embodiment, the locking assembly includes a second locking block, a second pull handle, and a second spring. Two second locking blocks are slidably connected to the sides of the first and second heat insulation covers that are far apart from each other. A second pull handle is connected to each of the second locking blocks, and a second spring is connected between the second locking blocks and the first and second heat insulation covers.
[0007] As a further preferred embodiment, it also includes a first handle and a second handle, with the first handle connected to the side of the fixed frame that is far apart from each other, and the second handle connected to the left and right sides of the first heat insulation cover and the second heat insulation cover.
[0008] As a further preferred option, it also includes light-emitting strips, with light-emitting strips connected to the sides of the fixed frames that are close to each other.
[0009] As a further preferred embodiment, it also includes a first sealing strip and a second sealing strip, wherein the first sealing strip is connected to the side of the first heat insulation cover near the second heat insulation cover, and the second sealing strip is connected to the side of the second heat insulation cover near the first heat insulation cover.
[0010] As a further preferred embodiment, a temperature detector is also included, with the temperature detector connected to the first heat shield.
[0011] The present invention has the following advantages: The present invention is provided with a first locking block, a first pull handle and a first spring, which can greatly reduce the disassembly and installation time of the first heat insulation cover and the second heat insulation cover. No additional tools are required. The disassembly and installation process can be completed with only simple pressing or pulling actions, which can greatly improve work efficiency and reduce the safety risks caused by complex operations. Attached Figure Description
[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0013] Figure 2 This is a cross-sectional view of the fixing plate of this utility model.
[0014] Figure 3 This is a cross-sectional schematic diagram of the first heat insulation cover of this utility model.
[0015] Figure 4 This is an enlarged view of part A of this utility model.
[0016] Wherein: 1-fixed plate, 2-first heat insulation cover, 3-second heat insulation cover, 4-first locking block, 5-first pull handle, 6-first spring, 7-fixed frame, 8-transparent plate, 9-second locking block, 10-second pull handle, 11-second spring, 12-first sealing strip, 13-light strip, 14-first handle, 15-second sealing strip, 16-temperature detector, 17-second handle. Detailed Implementation
[0017] The present invention will be further described below with reference to specific embodiments. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "setting," "installing," "connecting," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.
[0018] A heat insulation protective cover for injection molding machines, such as Figures 1-4 As shown, the device includes a fixing plate 1, a first heat insulation cover 2, a second heat insulation cover 3, a first locking block 4, a first pull handle 5, a first spring 6, a fixing frame 7, a transparent plate 8, a locking assembly, a first handle 14, a second handle 17, a light-emitting strip 13, a first sealing strip 12, a second sealing strip 15, and a temperature detector 16. There are two fixing plates 1, symmetrically arranged on the left and right sides. The first heat insulation cover 2 and the second heat insulation cover 3 are slidably connected between the fixing plates 1. The first heat insulation cover 2 and the second heat insulation cover 3 are tightly fitted together. The left and right sides of both fixing plates 1 are slidably connected. There are two first locking blocks 4. The sides of the front and rear first locking blocks 4 that are furthest from each other are both sloped. The bottom area of the front and rear first locking blocks 4 is smaller than their top area. A first pull handle 5 is fixedly connected to each first locking block 4, and the first pull handle 5 passes through a fixed plate 1. A first spring 6 is fixedly connected between each first locking block 4 and the fixed plate 1. A fixed frame 7 and a locking assembly are fixedly connected to the sides of the first heat insulation cover 2 and the second heat insulation cover 3 that are furthest from each other. A transparent plate 8 is fixedly connected inside each fixed frame 7. A first handle 14 is fixedly connected to the sides of the fixed frame 7 that are furthest from each other. Both the heat insulation cover 2 and the second heat insulation cover 3 are fixedly connected to second handles 17 on their left and right sides. Light-emitting strips 13 are fixedly connected to the sides of the fixed frame 7 closest to each other. The light-emitting strips 13 significantly enhance the brightness inside the protective cover, allowing operators to have a clearer view during inspection, maintenance, or cleaning. A first sealing strip 12 is fixedly connected to the side of the first heat insulation cover 2 closest to the second heat insulation cover 3. The first sealing strip 12 improves the sealing between the fixed frame 7 and the first heat insulation cover 2 and the second heat insulation cover 3. The second heat insulation cover 3 is located near the first heat insulation cover 2. A second sealing strip 15 is fixedly connected to the side. The second sealing strip 15 can improve the sealing between the first heat insulation cover 2 and the second heat insulation cover 3 and the sealing between the first heat insulation cover 2 and the second heat insulation cover 3 and the injection molding machine. A temperature detector 16 is fixedly connected to the top front side of the first heat insulation cover 2. The temperature detector 16 can monitor the temperature change inside the protective cover in real time, ensure that the injection molding machine is kept within the optimal operating temperature range, and promptly detect abnormal high temperature conditions caused by damage to the injection molding machine or other reasons, prevent the injection molding machine from being damaged due to overheating, and reduce the risk of safety hazards such as fire.
[0019] like Figures 1-4 As shown, the locking assembly includes a second locking block 9, a second pull handle 10, and a second spring 11. Two second locking blocks 9 are slidably connected to the sides of the first heat insulation cover 2 and the second heat insulation cover 3 that are far apart from each other. The second pull handle 10 is fixedly connected to each second locking block 9. The second spring 11 is fixedly connected between the second locking block 9 and the first heat insulation cover 2 and the second heat insulation cover 3.
[0020] Initially, this protective cover is installed on the injection molding machine. The first spring 6 and the second spring 11 are in their normal positions. The first locking block 4 blocks both the first heat shield 2 and the second heat shield 3, and the second locking block 9 blocks both the fixing frame 7. When maintenance is required on the injection molding machine, pull the first front handle 5 upwards to slide the first front locking block 4 away from the fixing plate 1, compressing the first front spring 6. Then, slide the first heat shield 2 forward to disengage from the fixing plate 1. Releasing the first front handle 5 causes the first front spring 6 to return to its original position, allowing the first front locking block 4 to slide downwards and reset. To remove the first heat insulation cover 2, pull the first handle 5 on the rear side upwards. This causes the first locking block 4 on the rear side to slide away from the fixing plate 1, compressing the first spring 6 on the rear side. Then, slide the second heat insulation cover 3 backwards to disengage from the fixing plate 1. Release the first handle 5 on the rear side, and the first spring 6 on the rear side will return to its original position, causing the first locking block 4 on the rear side to slide downwards and reset. This allows the second heat insulation cover 3 to be removed. By following these steps, the first heat insulation cover 2 and the second heat insulation cover 3 can be removed, significantly reducing the burden on the first heat insulation cover 2 and the second heat insulation cover 3. The disassembly and installation of cover 3 can be completed without the use of additional tools, requiring only simple pressing or pulling actions. This greatly improves work efficiency and reduces safety risks caused by complex operations. After maintenance, when the first heat insulation cover 2 and the second heat insulation cover 3 need to be reset, slide the first heat insulation cover 2 forward to press the inclined surface of the first locking block 4 on the front side, so that the first locking block 4 on the front side is pressed upward and the first spring 6 on the front side is compressed. When the first heat insulation cover 2 is fully reset, the first heat insulation cover 2 no longer presses the first locking block 4 on the front side, and the first spring 6 on the front side returns to its original state, allowing the first locking block 4 on the front side to slide downward and reset. Then, reset the second heat insulation cover 3 according to the above steps. When the area to be maintained is small, pull the second handle 10 to slide the second locking block 9 away from the fixed frame 7, compressing the second spring 11. Then, remove the fixed frame 7 using the second handle 17, thereby exposing the inside of the injection molding machine. Then, the area to be maintained can be operated without disassembling the entire protective cover, simplifying the maintenance process and making maintenance work more efficient and convenient.
[0021] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A heat shield for an injection molding machine comprising two fixing plates (1) which are arranged symmetrically to the left and right, characterized in that It also includes a first heat insulation cover (2), a second heat insulation cover (3), a first locking block (4), a first pull handle (5), a first spring (6), a fixing frame (7), a transparent plate (8), and a locking assembly. The first heat insulation cover (2) and the second heat insulation cover (3) are slidably connected between the fixing plates (1). The first heat insulation cover (2) and the second heat insulation cover (3) are tightly attached to each other. Two first locking blocks (4) are slidably connected to the left and right sides of the two fixing plates (1). A first pull handle (5) is connected to each of the first locking blocks (4). The first pull handle (5) passes through the fixing plate (1). A first spring (6) is connected between the first locking block (4) and the fixing plate (1). A fixing frame (7) and a locking assembly are connected to the side of the first heat insulation cover (2) and the second heat insulation cover (3) that are far apart from each other. A transparent plate (8) is connected inside the fixing frame (7).
2. A heat shield guard for an injection molding machine as defined in claim 1, wherein, The locking assembly includes a second locking block (9), a second pull handle (10), and a second spring (11). The first heat shield (2) and the second heat shield (3) are slidably connected to two second locking blocks (9) on the side away from each other. The second locking blocks (9) are each connected to a second pull handle (10). The second locking blocks (9) are connected to the first heat shield (2) and the second heat shield (3) and a second spring (11) is connected between them.
3. A heat shield guard for an injection molding machine as defined in claim 2, wherein, The protective cover also includes a first handle (14) and a second handle (17). The first handle (14) is connected to the side of the fixed frame (7) that is far apart from each other, and the second handle (17) is connected to the left and right sides of the first heat insulation cover (2) and the second heat insulation cover (3).
4. A heat shield guard for an injection molding machine as defined in claim 3, wherein, The protective cover also includes light-emitting strips (13), and light-emitting strips (13) are connected to the sides of the fixed frame (7) that are close to each other.
5. A heat shield guard for an injection molding machine as defined in claim 4, wherein, The protective cover also includes a first sealing strip (12) and a second sealing strip (15). The first heat insulation cover (2) is connected to the first sealing strip (12) on the side near the second heat insulation cover (3), and the second heat insulation cover (3) is connected to the second sealing strip (15) on the side near the first heat insulation cover (2).
6. A heat shield guard for an injection molding machine as defined in claim 5, wherein, The protective cover also includes a temperature detector (16), and the temperature detector (16) is connected to the first heat insulation cover (2).