An automatic demolding device for fiberglass products

Abstract

This utility model discloses an automatic demolding device for fiberglass products, belonging to the technical field of demolding devices. It includes a mold assembly consisting of a first mold and a second mold. The first mold is located above the second mold, and a demolding push rod is slidably inserted into the lower part of the second mold. A demolding mechanism is fixedly connected to the lower part of the second mold. This utility model utilizes the high-precision transmission of a servo motor and a lead screw to convert the motor's rotational motion into the smooth linear movement of the lead screw block. This, in turn, drives the first wedge block to slide along the wedge-shaped surface of the lower part of the second wedge block. Through the principle of inclined plane mechanics conversion of the wedge surface, the horizontal displacement is converted into the vertical upward force of the second wedge block, pushing the demolding push rod to evenly eject the product embedded in the second mold. The precise speed control of the servo motor and the precise pitch design of the lead screw ensure uniform horizontal movement speed of the first wedge block, avoiding the pressure fluctuation problems of traditional hydraulic and pneumatic drives.

Description

Technical Field

[0001] This utility model relates to the field of demolding device technology, and in particular to an automatic demolding device for fiberglass products. Background Technology

[0002] Automatic demolding devices for fiberglass products are specialized equipment that automatically removes products from the mold after curing by means of mechanical, hydraulic, pneumatic or electric drive, in conjunction with a PLC control system and demolding actuator. This solves the problems of low efficiency, high damage rate and high labor cost of traditional manual demolding.

[0003] However, in the existing technology, the automatic demolding device for FRP products has insufficient demolding force control and compatibility with complex structures when dealing with products with grooves, barbs or multi-layer composite structures. Traditional ejector pin arrays and push plates have fixed mechanical structure layouts, which cannot match the nonlinear demolding resistance distribution of the products. In addition, the force transmission deviation of hydraulic and pneumatic drives causes edge cracking and surface scratches in areas with concentrated resistance such as grooves and barbs due to local stress overload. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing an automatic demolding device for fiberglass products.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic demolding device for fiberglass products, comprising a mold assembly, which consists of a first mold and a second mold. The first mold is located above the second mold, and a demolding push rod is slidably inserted into the lower part of the second mold. A demolding mechanism is fixedly connected to the lower part of the second mold, and the upper part of the demolding mechanism is fixedly connected to the bottom of the demolding push rod. The demolding mechanism includes a fixed frame, and a lead screw is rotatably connected to the upper part of the fixed frame. The lead screw has two sets of threads in opposite directions on its surface, and thread blocks are respectively connected to the surfaces of the two sets of threads. A first wedge block is fixedly connected to the upper part of the thread blocks, and a second wedge block is slidably connected to the upper part of the first wedge block. An adjustment component is fixedly connected to the upper part of the second wedge block, and the adjustment component is fixedly connected to the demolding push rod.

[0006] Preferably, a servo motor is fixedly connected to the end of the fixed frame, and the output end of the servo motor is fixedly connected to the lead screw.

[0007] Preferably, a slide rail is fixedly connected to the upper part of the fixed frame, and a slider is slidably connected to the upper part of the slide rail. The slider is fixedly connected to the bottom of the first wedge block.

[0008] Preferably, the adjusting component includes a threaded rod, which is fixedly connected to the upper part of the second wedge block. A sleeve is threadedly connected to the upper part of the second wedge block, and a push block is fixedly connected to the upper part of the sleeve. A protective pad is fixedly connected to the upper part of the push block, and the protective pad is located below the demolding push rod.

[0009] Preferably, a limiting rod is fixedly connected to the upper part of the second wedge block, the limiting rod is slidably inserted into the push plate, and a spring is provided on the surface of the limiting rod. One end of the spring is fixedly connected to the second wedge block, and the other end of the spring is fixedly connected to the bottom of the push plate.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] 1. In this utility model, the high-precision transmission of a servo motor and a lead screw converts the motor's rotational motion into the smooth linear movement of the lead block. This, in turn, drives the first wedge block to slide along the wedge-shaped surface of the lower part of the second wedge block. Through the principle of inclined plane mechanical conversion of the wedge surface, the horizontal displacement is converted into the vertical upward force of the second wedge block, pushing the demolding push rod to evenly eject the product embedded in the second mold. The precise speed control of the servo motor and the precise pitch design of the lead screw ensure uniform horizontal movement speed of the first wedge block, avoiding the pressure fluctuation problems of traditional hydraulic and pneumatic drives.

[0012] 2. In this utility model, by fitting the wedge surfaces of the first wedge block and the second wedge block together, the ejection force can be decomposed into a stable vertical thrust, eliminating the risk of shear damage to the product caused by the lateral component force; the demolding push rod achieves uniform force on the bottom of the product through the synchronous lifting of the second wedge block. Especially for areas with concentrated resistance such as grooves and barbs, the differential ejection rate of the push rod can be preset by the servo system to avoid local stress overload, significantly improving the stability of the demolding process and the integrity of the product.

[0013] 3. In this utility model, the initial engagement of the spring and the push plate forms an elastic buffer mechanism during normal demolding. When the demolding push rod pushes the product, it pushes the push plate back to compress the spring. The elastic deformation of the spring achieves flexible ejection, avoiding impact damage to the product surface caused by rigid thrust. When facing products with deep grooves, barbs, etc., which require large thrust, the rotating sleeve drives the push block and the protective pad to move upward, so that the push block is separated from the elastic connection of the spring and directly contacts the top of the second wedge block, constructing a rigid transmission path. The upward thrust of the second wedge block is transmitted to the demolding push rod without attenuation, improving the thrust efficiency and effectively overcoming the mechanical seizing in high resistance areas. Attached Figure Description

[0014] Figure 1 This utility model provides a first three-dimensional structural schematic diagram of an automatic demolding device for fiberglass products;

[0015] Figure 2 This utility model provides a second three-dimensional structural diagram of an automatic demolding device for fiberglass products;

[0016] Figure 3 This utility model provides a three-dimensional structural diagram of the demolding mechanism in an automatic demolding device for fiberglass products;

[0017] Figure 4 This utility model provides a side view of the cross-sectional structure of the sleeve in an automatic demolding device for fiberglass products.

[0018] Legend: 1. Mold assembly; 11. Mold No. 1; 12. Mold No. 2; 2. Demolding mechanism; 21. Fixing frame; 22. Servo motor; 23. Lead screw; 24. Lead block; 25. Slide rail; 26. Slider; 27. Wedge block No. 1; 28. Wedge block No. 2; 29. ​​Limiting rod; 210. Spring; 211. Push plate; 212. Threaded rod; 213. Sleeve; 214. Push block; 215. Protective pad; 3. Demolding push rod. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: As Figures 1-3 As shown, this utility model provides an automatic demolding device for fiberglass products, including a mold assembly 1. The mold assembly 1 consists of a first mold 11 and a second mold 12. The first mold 11 is located above the second mold 12. A demolding push rod 3 is slidably inserted into the lower part of the second mold 12. A demolding mechanism 2 is fixedly connected to the lower part of the second mold 12. The upper part of the demolding mechanism 2 is fixedly connected to the bottom of the demolding push rod 3. The demolding mechanism 2 includes a fixing frame 21. A lead screw 23 is rotatably connected to the upper part of the fixing frame 21. The surface of the lead screw 23 is provided with two sets of threads in opposite directions. Each threaded surface is connected to a threaded block 24. A first wedge block 27 is fixedly connected to the upper part of the threaded block 24. A second wedge block 28 is slidably connected to the upper part of the first wedge block 27. An adjustment component is fixedly connected to the upper part of the second wedge block 28. The adjustment component is fixedly connected to the demolding push rod 3. A servo motor 22 is fixedly connected to the end of the fixed frame 21. The output end of the servo motor 22 is fixedly connected to the lead screw 23. A slide rail 25 is fixedly connected to the upper part of the fixed frame 21. A slider 26 is slidably connected to the upper part of the slide rail 25. The slider 26 is fixedly connected to the bottom of the first wedge block 27.

[0022] The specific settings and functions of this embodiment are described below. After the product is processed by mold 11 and mold 22, the product is embedded inside mold 22. At this time, the servo motor 22 drives the lead screw 23 to rotate, and the lead screw 23 drives the lead block 24 to move. The movement of the lead block 24 will cause the first wedge block 27 to slide under the second wedge block 28. The wedge surface of the first wedge block 27 pushes the wedge surface of the second wedge block 28 to move upward, thereby pushing the demolding push rod 3 to move upward. The push of the demolding push rod 3 makes the product detach from the inside of mold 22. Through the design of the wedge surfaces of the first wedge block 27 and the second wedge block 28, and in combination with the rotation of the servo motor 22 and the lead screw 23, the movement of the first wedge block 27 is uniform. At the same time, the rising push of the demolding push rod 3 driven by the second wedge block 28 is stable, thereby avoiding the product being subjected to excessive force suddenly during demolding.

[0023] Utilizing the high-precision transmission of the servo motor 22 and the lead screw 23, the rotational motion of the motor is converted into the smooth linear movement of the lead block 24, which in turn drives the first wedge block 27 to slide along the wedge surface of the second wedge block 28. Through the principle of inclined plane mechanical conversion of the wedge surface, the horizontal displacement is converted into the vertical upward force of the second wedge block 28, which pushes the demolding push rod 3 to uniformly eject the product embedded in the second mold 12. Among them, the precise speed control of the servo motor 22 and the precision pitch design of the lead screw 23 ensure uniform horizontal movement speed of the first wedge block 27, avoiding pressure fluctuation problems of traditional hydraulic and pneumatic drives; the wedge-shaped surfaces of the first wedge block 27 and the second wedge block 28 fit together, which can decompose the ejection force into a stable vertical thrust, eliminating the risk of shear damage to the product by the lateral component force; the demolding push rod 3 achieves uniform force on the bottom of the product through the synchronous lifting of the second wedge block 28. Especially for areas with concentrated resistance such as grooves and barbs, the servo system can preset the differentiated ejection rate of the demolding push rod 3 to avoid local stress overload, significantly improving the stability of the demolding process and the integrity of the product.

[0024] Example 2: Figures 1-4 As shown, the adjustment assembly includes a threaded rod 212, which is fixedly connected to the upper part of the second wedge block 28. A sleeve 213 is threadedly connected to the upper part of the second wedge block 28. A push block 214 is fixedly connected to the upper part of the sleeve 213. A protective pad 215 is fixedly connected to the upper part of the push block 214. The protective pad 215 is located at the lower part of the demolding push rod 3. A limit rod 29 is fixedly connected to the upper part of the second wedge block 28. The limit rod 29 is slidably inserted into the push plate 211. A spring 210 is provided on the surface of the limit rod 29. One end of the spring 210 is fixedly connected to the second wedge block 28, and the other end of the spring 210 is fixedly connected to the bottom of the push plate 211.

[0025] The overall effect of this embodiment is that during the process of the second wedge block 28 driving the demolding push rod 3 to push, the demolding push rod 3 will push the push plate 211 downward, thereby compressing the spring 210 and pushing the product to demold. When demolding products that require a large push, the push block 214 and the protective pad 215 are moved upward by rotating the sleeve 213. The push block 214 establishes a direct push connection with the second wedge block 28 at the bottom of the push plate 211, so that the pushing force generated by the second wedge block 28 during the upward movement directly acts on the demolding push rod 3. At the same time, the pushing force acts on the product inside the second mold 12, thereby completing the demolding operation for products that require a large pushing force to demold.

[0026] The switchable thrust transmission structure design effectively solves the adaptability problem for products with different demolding resistances. Utilizing the initial engagement of spring 210 and push plate 211, an elastic buffer mechanism is formed during normal demolding. When the demolding push rod 3 pushes the product, it pushes back against push plate 211 to compress spring 210. Flexible ejection is achieved through the elastic deformation of spring 210, avoiding impact damage to the product surface from rigid thrust. When dealing with products requiring high thrust, such as those with deep grooves or barbs, rotating sleeve 213 moves push block 214 and protective pad 215 upwards, causing push block 214 to disengage from the elastic connection of spring 210 and directly contact the top of wedge block 28, establishing a rigid transmission path and transferring the force of the second wedge block 28... The upward thrust is transmitted to the demolding push rod 3 without attenuation, improving the thrust efficiency and effectively overcoming mechanical seizing in high-resistance areas. The protective pad 215 is made of polyurethane material, which buffers the rigid contact between the push rod and the mold during rigid pushing, avoiding wear caused by direct friction between the push block 214 and the second wedge block 28. At the same time, the lifting height of the push block 214 can be precisely controlled through the thread adjustment of the sleeve 213, adapting to the gap between the push plate 211 and the mold of different thicknesses, realizing the rapid switching between the two modes of "elastic buffer" and "rigid strong push". This allows the device to handle both the flexible demolding of ordinary products and the strong demolding requirements of complex structure products, significantly enhancing the device's process adaptability to products with different resistance.

[0027] The usage and working principle of this device are as follows: After the product is processed by mold 11 and mold 22, the product is embedded inside mold 22. At this time, the servo motor 22 drives the lead screw 23 to rotate, and the lead screw 23 drives the lead block 24 to move. The movement of the lead block 24 will cause the first wedge block 27 to slide under the second wedge block 28. The wedge surface of the first wedge block 27 pushes the wedge surface of the second wedge block 28 to move upward, thereby pushing the demolding push rod 3 to move upward. The demolding push rod 3 pushes the product out of the mold 22. Through the design of the wedge surfaces of the first wedge block 27 and the second wedge block 28, and in combination with the rotation of the servo motor 22 and the lead screw 23, the movement of the first wedge block 27 is uniform. At the same time, the rising push of the demolding push rod 3 driven by the second wedge block 28 is stable, thereby avoiding the product being subjected to excessive force suddenly during demolding.

[0028] During the process of the second wedge block 28 pushing the demolding push rod 3, the demolding push rod 3 will push the push plate 211 downward, thereby compressing the spring 210 and pushing the product to demold. When demolding products that require a large push, the push block 214 and the protective pad 215 are moved upward by rotating the sleeve 213. The push block 214 establishes a direct push connection with the second wedge block 28 at the bottom of the push plate 211, so that the thrust generated by the second wedge block 28 during the upward movement directly acts on the demolding push rod 3. At the same time, the thrust acts on the product inside the second mold 12, thereby completing the demolding operation for products that require a large push force to demold.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. An automatic demolding device for glass fiber reinforced plastic products, comprising a mold assembly (1) composed of a first mold (11) and a second mold (12), the first mold (11) being located on the upper part of the second mold (12), and a demolding push rod (3) being slidably inserted into the lower part of the second mold (12), characterized in that: The lower part of the mold (12) is fixedly connected to the demolding mechanism (2). The upper part of the demolding mechanism (2) is fixedly connected to the bottom of the demolding push rod (3). The demolding mechanism (2) includes a fixed frame (21). The upper part of the fixed frame (21) is rotatably connected to a lead screw (23). The surface of the lead screw (23) is provided with two sets of threads in opposite directions. The surfaces of the two sets of threads are respectively connected to thread blocks (24). The upper part of the thread block (24) is fixedly connected to a first wedge block (27). The upper part of the first wedge block (27) is slidably connected to a second wedge block (28). The upper part of the second wedge block (28) is fixedly connected to an adjustment component. The adjustment component is fixedly connected to the demolding push rod (3).

2. The automatic demolding device for fiberglass products according to claim 1, characterized in that: A servo motor (22) is fixedly connected to the end of the fixed frame (21), and the output end of the servo motor (22) is fixedly connected to the lead screw (23).

3. The automatic demolding device for fiberglass products according to claim 1, characterized in that: The upper part of the fixed frame (21) is fixedly connected to the slide rail (25), and the upper part of the slide rail (25) is slidably connected to the slider (26). The slider (26) is fixedly connected to the bottom of the first wedge block (27).

4. The automatic demolding device for fiberglass products according to claim 1, characterized in that: The adjustment assembly includes a threaded rod (212), which is fixedly connected to the upper part of the second wedge block (28). The upper part of the second wedge block (28) is threadedly connected to a sleeve (213), and the upper part of the sleeve (213) is fixedly connected to a push block (214). The upper part of the push block (214) is fixedly connected to a protective pad (215), which is located below the demolding push rod (3).

5. The automatic demolding device for fiberglass products according to claim 1, characterized in that: The upper part of the second wedge block (28) is fixedly connected to a limiting rod (29). The limiting rod (29) is slidably inserted into the push plate (211). A spring (210) is provided on the surface of the limiting rod (29). One end of the spring (210) is fixedly connected to the second wedge block (28), and the other end of the spring (210) is fixedly connected to the bottom of the push plate (211).

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