A multi-cavity synchronous press molding die for polyurethane foaming

Abstract

This utility model relates to the technical field of polyurethane foam molding equipment, and discloses a multi-cavity synchronous pressure molding mold for polyurethane foaming. It includes a mounting frame, a lower mold located in the middle of the mounting frame, and fixed rods fixedly connected to both ends of the lower mold. A drive assembly is located at the left end of the mounting frame, and a hydraulic rod is fixedly connected to the top of the mounting frame. This utility model uses a motor to drive a worm gear to rotate. Because the worm gear meshes with a worm wheel, the worm wheel rotates, causing the fixed rods to rotate on the inner wall of the mounting frame, thus tilting the lower mold. When the lower mold rotates, a support rod slides on the inner wall of an arc-shaped groove. Then, the output end of a cylinder pushes a fixed plate upwards, causing several extension rods and push plates to move. The push plates push out the polyurethane product from the molding cavity. Due to the tilt of the lower mold, the polyurethane product falls into a collection box, achieving rapid unloading and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of polyurethane foam molding equipment, and in particular to a multi-cavity synchronous pressure molding mold for polyurethane foaming. Background Technology

[0002] Polyurethane is a high-performance polymer material with excellent physical and mechanical properties, chemical resistance, abrasion resistance, and good processing performance. It is widely used in various fields such as automotive, construction, home appliances, footwear, textiles, furniture, packaging, electronics, medical, and sports. Polyurethane materials can be prepared through various processing methods, including casting, spraying, molding, and foaming. Among these, polyurethane foaming technology is particularly common, used to produce flexible, rigid, and semi-rigid foam plastics for applications such as thermal insulation, cushioning packaging, furniture padding, mattresses, and automotive seats.

[0003] Currently, most polyurethane foam molding molds have demolding structures, but after the polyurethane products are demolded, the materials still need to be manually removed, which is time-consuming and labor-intensive, and the unloading efficiency is low, thus affecting the production efficiency. Therefore, we propose a multi-cavity synchronous pressure molding mold for polyurethane foaming. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a multi-cavity synchronous pressure molding mold for polyurethane foaming.

[0005] This utility model is achieved using the following technical solution: a multi-cavity synchronous pressure molding mold for polyurethane foaming, comprising a mounting frame, a lower mold disposed in the middle of the mounting frame, fixing rods fixedly connected to both the left and right ends of the lower mold, a driving assembly disposed at the left end of the mounting frame, a hydraulic rod fixedly connected to the top of the mounting frame, the output end of the hydraulic rod penetrating the mounting frame and fixedly connected to an upper mold, a guide rod fixedly connected to the top of the upper mold, arc-shaped grooves provided at both the left and right ends of the mounting frame, a plurality of molding cavities disposed inside the lower mold, stepped grooves provided at the bottom of each of the molding cavities, sleeves fixedly connected to both the front and rear ends of the lower mold, a discharge assembly disposed at the bottom of the lower mold, and a protective cover fixedly connected to the left end of the mounting frame;

[0006] The drive assembly includes a U-shaped frame, a worm gear rotatably connected to the inner wall of the U-shaped frame, a motor fixedly connected to the top of the U-shaped frame, and a worm wheel meshing with the inner wall of the worm gear.

[0007] The above technical solution uses a motor to drive a worm gear to rotate. Because the worm gear meshes with a worm wheel, the worm wheel rotates, causing the fixed rod to rotate on the inner wall of the mounting frame. This causes the lower mold to rotate and tilt, facilitating rapid unloading. Through the several molding cavities inside the lower mold, multiple polyurethane products can be produced simultaneously, improving production efficiency.

[0008] As a further improvement to the above solution, the right end of the U-shaped frame is fixedly connected to the left end of the mounting frame, and the output end of the motor is fixedly connected to the top of the worm gear.

[0009] Through the above technical solution, the worm gear mechanism's self-locking function ensures that the worm wheel will not rotate due to external force when the worm stops rotating, thus ensuring the stability of the lower mold during tilting or forming processes.

[0010] As a further improvement to the above solution, the inner wall of the worm gear is fixedly connected to the surface of the fixed rod, and the surface of the fixed rod is rotatably connected to the inner wall of the mounting bracket.

[0011] The above technical solution uses a fixing rod to support the lower mold.

[0012] As a further improvement to the above solution, the surface of the guide rod is slidably connected to the inner wall of the mounting bracket, and there are two guide rods, which are symmetrically distributed above the mold positions.

[0013] With the above technical solution, when the upper mold moves, the guide rod will slide along the mounting frame, ensuring the stability of the upper mold during movement, while ensuring that the raw materials in each molding cavity are subjected to the same pressure, thus ensuring the consistency of the products.

[0014] As a further improvement to the above solution, the unloading assembly includes a support rod, a support plate is fixedly connected to the middle of the support rod, a cylinder is fixedly connected to the top of the support plate, a fixed plate is fixedly connected to the output end of the cylinder, a plurality of extension rods are fixedly connected to the top of the fixed plate, a push plate is fixedly connected to the top of each of the plurality of extension rods, and a limit rod is fixedly connected to the top of the fixed plate.

[0015] The above technical solution uses the output end of the cylinder to push the fixed plate upward, which in turn moves several extension rods and push plates. The push plates push out the polyurethane product inside the molding cavity, thus demolding and making it easier to remove the molded polyurethane product later.

[0016] As a further improvement to the above solution, the surface of the support rod is slidably connected to the inner wall of the arc-shaped groove, and the number of extension rods corresponds to the number of forming cavities.

[0017] The above technical solution uses an arc groove to limit the movement of the support rod, allowing it to slide only within the groove, thus enabling the support plate to rotate along with the lower mold.

[0018] As a further improvement to the above solution, the push plate is located inside the stepped groove, and the surface of the limiting rod is slidably connected to the inner wall of the sleeve.

[0019] The above technical solution allows the push plate to be embedded in the stepped groove, keeping the molding cavity flat and limiting the position of the push plate. The sleeve limits the position of the limiting rod, ensuring the stability of the push plate during movement and preventing deviation.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This invention utilizes a drive assembly and an unloading assembly. Specifically, a motor drives a worm gear to rotate. The worm gear meshes with a worm wheel, causing the worm wheel to rotate, which in turn rotates a fixed rod on the inner wall of the mounting frame. This causes the lower mold to rotate and tilt. As the lower mold rotates, a support rod slides on the inner wall of the arc-shaped groove. Then, the output end of a cylinder pushes a fixed plate upwards, causing several extension rods and push plates to move. The push plates eject the polyurethane product from the molding cavity. Due to the tilt of the lower mold, the polyurethane product falls into a collection box, achieving rapid unloading and improving production efficiency.

[0022] This invention utilizes a worm gear and a worm shaft, specifically a worm gear and worm shaft mechanism with a self-locking function. When the worm shaft stops rotating, the worm gear will not rotate due to external force, ensuring the lower mold remains stable during tilting or molding processes and preventing accidental rotation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic cross-sectional view of the present invention.

[0025] Figure 3 This is a side view of the structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the lower mold structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the unloading assembly structure of this utility model.

[0028] Explanation of key symbols:

[0029] 1. Mounting frame; 2. Lower mold; 3. Fixing rod; 4. Drive assembly; 401. U-shaped frame; 402. Worm gear; 403. Motor; 404. Worm wheel; 5. Hydraulic rod; 6. Upper mold; 7. Guide rod; 8. Arc groove; 9. Stepped groove; 10. Sleeve; 11. Unloading assembly; 1101. Support rod; 1102. Support plate; 1103. Cylinder; 1104. Fixing plate; 1105. Extension rod; 1106. Push plate; 1107. Limiting rod; 12. Protective cover. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] Example:

[0032] Please combine Figure 1-5 This embodiment of a multi-cavity synchronous pressure molding die for polyurethane foam includes a mounting frame 1, a lower mold 2 in the middle of the mounting frame 1, fixing rods 3 fixedly connected to both the left and right ends of the lower mold 2, a drive assembly 4 at the left end of the mounting frame 1, a hydraulic rod 5 fixedly connected to the top of the mounting frame 1, the output end of the hydraulic rod 5 passing through the mounting frame 1 and fixedly connected to an upper mold 6, a guide rod 7 fixedly connected to the top of the upper mold 6, arc grooves 8 opened at both the left and right ends of the mounting frame 1, a plurality of molding cavities are provided inside the lower mold 2, stepped grooves 9 are opened at the bottom of the plurality of molding cavities, sleeves 10 fixedly connected to both the front and rear ends of the lower mold 2, a discharge assembly 11 is provided at the bottom of the lower mold 2, and a protective cover 12 is fixedly connected to the left end of the mounting frame 1.

[0033] The drive assembly 4 includes a U-shaped frame 401, with a worm gear 402 rotatably connected to the inner wall of the U-shaped frame 401. A motor 403 is fixedly connected to the top of the U-shaped frame 401, and a worm wheel 404 meshes with the inner wall of the worm gear 402. When the motor 403 is started, it drives the worm gear 402 to rotate. Since the worm gear 402 meshes with the worm wheel 404, the worm wheel 404 rotates, causing the fixed rod 3 to rotate on the inner wall of the mounting frame 1, thus causing the lower mold 2 to rotate and tilt, facilitating subsequent rapid unloading.

[0034] The right end of the U-shaped frame 401 is fixedly connected to the left end of the mounting frame 1, and the output end of the motor 403 is fixedly connected to the top of the worm gear 402.

[0035] The inner wall of the worm gear 404 is fixedly connected to the surface of the fixed rod 3, and the surface of the fixed rod 3 is rotatably connected to the inner wall of the mounting bracket 1.

[0036] The surface of the guide rod 7 is slidably connected to the inner wall of the mounting bracket 1. There are two guide rods 7, and the mold 6 is symmetrically distributed above the two guide rods 7.

[0037] The unloading assembly 11 includes a support rod 1101, a support plate 1102 fixedly connected to the middle of the support rod 1101, a cylinder 1103 fixedly connected to the top of the support plate 1102, a fixed plate 1104 fixedly connected to the output end of the cylinder 1103, a plurality of extension rods 1105 fixedly connected to the top of the fixed plate 1104, a push plate 1106 fixedly connected to the top of each extension rod 1105, and a limit rod 1107 fixedly connected to the top of the fixed plate 1104. When the lower mold 2 rotates, the support rod 1101 slides on the inner wall of the arc groove 8, and then the cylinder 1103 is activated. The output end of the cylinder 1103 pushes the fixed plate 1104 upward, causing the plurality of extension rods 1105 and the push plate 1106 to move, and the polyurethane product inside the molding cavity is demolded by the push plate 1106.

[0038] The surface of the support rod 1101 is slidably connected to the inner wall of the arc groove 8, and the number of extension rods 1105 corresponds to the number of molding cavities.

[0039] The push plate 1106 is located inside the stepped groove 9, and the surface of the limiting rod 1107 is slidably connected to the inner wall of the sleeve 10.

[0040] The implementation principle of a multi-cavity synchronous pressure molding die for polyurethane foaming in this embodiment is as follows: First, the mounting frame 1 is installed and fixed. A collection box is placed below the lower mold 2 to collect the molded polyurethane products. Polyurethane raw materials are injected into several molding cavities of the lower mold 2. Then, the hydraulic rod 5 is activated, and its output end pushes the upper mold 6 downwards, causing the upper mold 6 to close with the lower mold 2, applying pressure to the top of the polyurethane product. After the polyurethane product inside the molding cavity has foamed, the hydraulic rod 5 drives the upper mold 6 upwards to open the mold. Then, the motor 403 is activated, and the motor 403 drives the worm gear 4... 02 rotates, and because the worm gear 402 meshes with the worm wheel 404, the worm wheel 404 rotates, causing the fixed rod 3 to rotate on the inner wall of the mounting frame 1, causing the lower mold 2 to rotate and tilt. When the lower mold 2 rotates, the support rod 1101 slides on the inner wall of the arc groove 8, and then the cylinder 1103 is activated. The output end of the cylinder 1103 pushes the fixed plate 1104 to move upward, causing several extension rods 1105 and push plate 1106 to move. The polyurethane product inside the molding cavity is pushed out through the push plate 1106. Because the lower mold 2 is tilted, the polyurethane product will fall into the collection box, realizing rapid unloading and improving production efficiency.

[0041] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A multi-cavity synchronous pressure molding die for polyurethane foaming, characterized in that, The device includes a mounting frame (1), a lower mold (2) in the middle of the mounting frame (1), a fixing rod (3) fixedly connected to both the left and right ends of the lower mold (2), a drive assembly (4) at the left end of the mounting frame (1), a hydraulic rod (5) fixedly connected to the top of the mounting frame (1), the output end of the hydraulic rod (5) passing through the mounting frame (1) and fixedly connected to an upper mold (6), a guide rod (7) fixedly connected to the top of the upper mold (6), arc grooves (8) opened at both the left and right ends of the mounting frame (1), several forming cavities are provided inside the lower mold (2), stepped grooves (9) are opened at the bottom of the several forming cavities, sleeves (10) are fixedly connected to both the front and rear ends of the lower mold (2), a material unloading assembly (11) is provided at the bottom of the lower mold (2), and a protective cover (12) is fixedly connected to the left end of the mounting frame (1). The drive assembly (4) includes a U-shaped frame (401), a worm gear (402) is rotatably connected to the inner wall of the U-shaped frame (401), a motor (403) is fixedly connected to the top of the U-shaped frame (401), and a worm wheel (404) is engaged with the inner wall of the worm gear (402).

2. The multi-cavity synchronous pressure molding die for polyurethane foam as described in claim 1, characterized in that: The right end of the U-shaped frame (401) is fixedly connected to the left end of the mounting frame (1), and the output end of the motor (403) is fixedly connected to the top of the worm gear (402).

3. The multi-cavity synchronous pressure molding die for polyurethane foam as described in claim 1, characterized in that: The inner wall of the worm gear (404) is fixedly connected to the surface of the fixed rod (3), and the surface of the fixed rod (3) is rotatably connected to the inner wall of the mounting bracket (1).

4. The multi-cavity synchronous pressure molding die for polyurethane foam as described in claim 1, characterized in that: The surface of the guide rod (7) is slidably connected to the inner wall of the mounting bracket (1). There are two guide rods (7), and the mold (6) is symmetrically distributed above the two guide rods (7).

5. A multi-cavity synchronous pressure molding die for polyurethane foam as described in claim 1, characterized in that: The unloading assembly (11) includes a support rod (1101), a support plate (1102) is fixedly connected to the middle of the support rod (1101), a cylinder (1103) is fixedly connected to the top of the support plate (1102), a fixing plate (1104) is fixedly connected to the output end of the cylinder (1103), a plurality of extension rods (1105) are fixedly connected to the top of the fixing plate (1104), a push plate (1106) is fixedly connected to the top of each of the extension rods (1105), and a limit rod (1107) is fixedly connected to the top of the fixing plate (1104).

6. The multi-cavity synchronous pressure molding die for polyurethane foam as described in claim 5, characterized in that: The surface of the support rod (1101) is slidably connected to the inner wall of the arc groove (8), and the number of the extension rods (1105) corresponds to the number of the forming cavities.

7. A multi-cavity synchronous pressure molding die for polyurethane foam as described in claim 5, characterized in that: The push plate (1106) is located inside the stepped groove (9), and the surface of the limiting rod (1107) is slidably connected to the inner wall of the sleeve (10).

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