A ball valve shell injection molding device facilitating quick mold replacement

Abstract

The utility model discloses a ball valve shell injection molding device convenient to quick replacement mould, apply in high polymer material processing technical field, including fixed plate, the left side of fixed plate is provided with moving plate, the front end and rear end of the opposite one side top and bottom of fixed plate and moving plate are provided with the slot, the utility model discloses through the remarkable promotion production efficiency, reduce downtime, make mould replacement operation simple and quick, reduced staff operation and adjustment time, reduced the labor intensity and technical threshold of operator, the device can also flexible adaptation change more specification ball valve shell small -batch production demand, improve equipment utilization, save the cost for production enterprise, the efficiency of production process is promoted, and the design facilitates the plastic part unloading process, avoids the trouble of frequent artificial picking, and the operator can easily complete the quick transfer of batch plastic parts, significantly reduces the labor intensity, makes material turnover more efficient simultaneously, especially suitable for continuous production scene.

Description

Technical Field

[0001] This utility model belongs to the field of polymer material processing technology, and specifically relates to a ball valve body injection molding device that facilitates quick mold replacement. Background Technology

[0002] The working principle of an injection molding machine is similar to that of a syringe. It uses the thrust of a screw (or plunger) to inject pre-plasticized molten plastic (i.e., viscous flow state) into a closed mold cavity, where it solidifies and shapes to obtain the finished product. A plastic ball valve is a type of ball valve, mainly assembled from RPP or PVDF injection molded parts. It is suitable for shutting off flow in processes involving corrosive media, possessing excellent corrosion resistance and temperature resistance (the applicable temperature range varies depending on the material). Its sealing ring is made of F4 material, offering excellent corrosion resistance, long service life, flexible rotation, and ease of use. The integral design of the plastic ball valve reduces leakage points and increases strength, while the connection-type ball valve is easy to assemble and disassemble. Plastic ball valves can be classified according to their connection method into flanged plastic ball valves, threaded plastic ball valves, socket plastic ball valves, and double-union plastic ball valves, etc. The ball valve body injection molding device is the injection molding device used to produce the ball valve body.

[0003] However, traditional ball valve body injection molding equipment suffers from long downtime and low production efficiency due to the time-consuming and labor-intensive mold replacement process. Operators need to frequently perform tedious mechanical adjustments, which is not only labor-intensive but also requires a high level of technical expertise. In addition, the plastic parts need to be picked up manually after demolding, which slows down the production pace and increases the labor intensity of workers. Manual material transfer is inefficient and cannot meet the needs of continuous production, resulting in long idle waiting times for the equipment.

[0004] To address the problems mentioned in the background above, a ball valve housing injection molding device that facilitates quick mold changes is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a ball valve housing injection molding device that facilitates quick mold replacement, with the advantages of quick replacement and convenient unloading.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a ball valve housing injection molding device for easy and quick mold replacement, comprising a fixed plate, a movable plate provided on the left side of the fixed plate, slots provided at the front and rear ends of the top and bottom of the opposite side of the fixed plate and the movable plate, a rod slidably sleeved inside the slot, a slot provided on the opposite side of the rod at one end, a locking rod provided through and slidably sleeved at the top and bottom of the front and back of the fixed plate and the movable plate, and the inner end of the locking rod engaging with the inside of the locking slot, a spring sleeved on the outer end of the surface of the locking rod, a pressure block fixedly sleeved on the inner end of the surface of the locking rod, a mold fixedly sleeved on the outer end of the rod, and a discharge mechanism provided at the bottom of the mold.

[0007] The above technical solution employs a fixed plate and a movable plate as the basic load-bearing components of the device. Slots on their opposite surfaces provide precise guidance for the insertion rod. When installing the mold, the insertion rod, with the mold fixed to it, is aligned with the slot and pushed horizontally into the slot to achieve initial alignment of the mold with the fixed plate and movable plate, ensuring the parallelism of the mold's mating surfaces. Pulling the locking rod outward causes the pressure block to compress the spring, causing the spring to contract. After the insertion rod is pushed into place, the locking rod is released, and the spring, losing its compressive force, begins to rebound, moving the pressure block. The pressure block then moves the locking rod, inserting it into the slot of the slot and engaging it securely, thus fixing the mold to the movable plate and fixed plate. When the mold needs to be replaced, the locking rod is pulled outward... Pulling the outer end of the clamping rod compresses the spring, causing the inner end of the clamping rod to disengage from the slot and release the constraint on the insert rod. At this point, the insert rod can be directly pulled out along the slot direction, completing the disassembly of the old mold. After replacing the mold with a new one, repeat the installation and positioning steps, release the clamping rod, and the spring returns to its original position, pushing the clamping rod back into the slot of the new insert rod for quick fixation. This significantly improves production efficiency, reduces downtime, and simplifies mold replacement operations, reducing operator time and adjustment time. It also lowers the labor intensity and technical threshold for operators. The device can also flexibly adapt to the needs of small-batch production of ball valve bodies of various specifications, improving equipment utilization and saving costs for production enterprises.

[0008] The present invention is further configured such that the unloading mechanism includes a collection box, the collection box is located at the bottom of the mold, the front ends of both sides of the collection box are hinged to brackets, the bottom of the brackets are bolted to a movable stage, and an injection molding mechanism is provided on the right side of the fixed plate.

[0009] The above technical solution employs a material unloading mechanism. The collection box is located directly below the bottom of the mold. When the injection-molded plastic parts are demolded, they fall directly into the collection box. When a certain amount of plastic parts accumulate in the collection box, the moving platform is pulled, causing the platform to move the support and the collection box forward. Utilizing the hinge structure between the collection box and the support, the collection box is flipped outward around the hinge points on both front sides as the axis of rotation. At this point, the opening of the collection box tilts downward, and the internal plastic parts automatically slide out under gravity. A trolley and a box are placed at the bottom of the opening, and the plastic parts slide into the box, completing the unloading. After unloading, the collection box is flipped back to a horizontal position, and the moving platform is pushed back to the bottom of the mold, allowing the next collection cycle to begin. This improves the efficiency of the production process. The design facilitates the unloading process of plastic parts, avoids the hassle of frequent manual picking, and allows operators to easily and quickly transfer batches of plastic parts, significantly reducing labor intensity and making material turnover more efficient. It is especially suitable for continuous production scenarios.

[0010] The present invention is further configured such that the injection molding mechanism includes a material tube, the material tube is located on the right side of the fixed plate, a heater is sleeved on the left side of the surface of the material tube, a hopper is provided on the right side of the top of the material tube, a hydraulic device is provided on the right side of the material tube, a base is provided at the bottom of the hydraulic device and the fixed plate, a clamping mechanism is bolted to the left side of the top of the base away from the middle, and the right side of the clamping mechanism is bolted to the left side of the moving plate, and a fixing frame is bolted to the top of the clamping mechanism and the fixed plate.

[0011] The above technical solution employs an injection molding mechanism. A hopper stores plastic raw materials, which enter the feed tube under gravity. Heaters on the tube surface generate heat, raising the internal temperature through heat conduction. As the raw material flows through the tube, it is gradually heated to a molten state, preparing for subsequent injection molding. The base serves as the foundation for the entire mechanism, supporting the feed tube, hydraulic system, and clamping mechanism, ensuring the stability of each component. The hydraulic system provides driving force, pushing the molten plastic into the mold cavity at high pressure and speed. Simultaneously, the clamping mechanism is activated. The right side is bolted to the movable plate, which is driven by mechanical transmission to move towards the fixed plate, so that the mold is tightly closed and sufficient clamping force is provided to prevent the mold parting surface from opening and causing overflow when the high-pressure melt is injected. When the mold cavity is filled with melt and cooled to a certain degree under pressure, the hydraulic device stops working, the clamping mechanism reverses, and drives the movable plate away from the fixed plate to open the mold. After the mold opens, the plastic part falls into the collection box, completing one injection cycle. After that, all parts are reset, the hopper continues to supply material to the material pipe, and the heater maintains the working temperature, waiting for the next injection command.

[0012] The present invention is further configured such that a slider is welded to the top and bottom of the movable plate, and a groove is provided on the left side of the top of the base near the middle and the middle of the bottom of the fixed frame, and the interior of the groove is slidably connected to the surface of the slider.

[0013] The above technical solution is adopted: by setting slider one and slide groove one, the movement of the moving plate can be limited.

[0014] The present invention is further configured such that two sliders are welded to both sides of the moving platform, and two grooves are provided at the bottom of both sides of the base, and the interior of the grooves is slidably connected to the surface of the sliders.

[0015] By adopting the above technical solution, the movement of the moving platform can be limited by setting slider two and slide groove two.

[0016] The present invention is further configured such that a through groove is provided through the right side of the mold located on the right side and the right side of the fixing plate.

[0017] The above technical solution involves setting a through groove, which allows the molten material inside the material tube to enter the internal cavity of the mold.

[0018] The present invention is further configured such that a handle is fixedly sleeved on the outer end of the lever.

[0019] The above technical solution allows for easy outward pulling of the lever by providing a handle.

[0020] The present invention is further provided that a handle is bolted to the front of the mobile platform.

[0021] The above technical solution allows for easy pulling out of the mobile platform by incorporating a handle.

[0022] In summary, this utility model has the following beneficial effects: 1. This utility model significantly improves production efficiency, reduces downtime, simplifies and speeds up mold replacement, reduces the time for staff to operate and adjust, and lowers the labor intensity and technical threshold for operators. The device can also flexibly adapt to the needs of small-batch production of ball valve bodies of various specifications, improve equipment utilization, and save costs for production enterprises. 2. This utility model improves the efficiency of the production process. Its design facilitates the unloading process of plastic parts, avoids the trouble of frequent manual picking, and allows operators to easily complete the rapid transfer of batches of plastic parts, significantly reducing labor intensity and making material turnover more efficient. It is especially suitable for continuous production scenarios. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front sectional view of the overall structure of this utility model; Figure 3 This is a top sectional view of a partial structure of this utility model; Figure 4 This is a top sectional view of the unloading mechanism of this utility model.

[0024] Reference numerals: 1. Fixed plate; 2. Moving plate; 3. Slot; 4. Insert rod; 5. Slot; 6. Locking rod; 7. Spring; 8. Pressure block; 9. Mold; 10. Collection box; 11. Support; 12. Moving table; 13. Material pipe; 14. Heater; 15. Hopper; 16. Hydraulic unit; 17. Base; 18. Mold locking mechanism; 19. Fixed frame; 20. Slider one; 21. Slide one; 22. Slider two; 23. Slide two; 24. Through groove; 25. Handle; 26. Pull handle. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1: refer to Figure 1 , Figure 2 , Figure 3A ball valve body injection molding device for easy and quick mold change includes a fixed plate 1, a movable plate 2 on the left side of the fixed plate 1, and slots 3 on the front and rear ends of the top and bottom sides of the fixed plate 1 and the movable plate 2 facing each other. A rod 4 is slidably fitted inside the slot 3. The clearance between the rod 4 and the slot 3 is 0.1-0.3mm, with an H7 / g6 tolerance. The length of the rod 4 is 300-500mm, adapted to the mold size. A groove 5 is provided on the opposite side of the rod 4 at one end. The front and back sides of the fixed plate 1 and the movable plate 2... A locking rod 6 is slidably sleeved through the top and bottom, and the inner end of the locking rod 6 is engaged with the inside of the locking groove 5. A spring 7 is sleeved on the outer end of the surface of the locking rod 6. The spring 7 is made of 65Mn, with a diameter of 5-8mm, a free length of 30-50mm, and an elastic force of 50-100N. A pressure block 8 is fixedly sleeved on the inner end of the surface of the locking rod 6. A mold 9 is fixedly sleeved on the outer end of the insertion rod 4. The mold 9 is made of Cr12MoV mold steel with a hardness of HRC58-62 and has 1-4 cavities. The left side is the moving mold and the right side is the fixed mold. A material unloading mechanism is provided at the bottom of the mold 9. The fixed plate 1 and the movable plate 2 serve as the basic load-bearing components of the device. Slots 3 on their opposite surfaces provide precise guidance for the insertion rod 4. When installing the mold 9, the insertion rod 4, with the mold 9 fixed to it, is aligned with the slot 3 and pushed horizontally in, achieving initial alignment of the mold 9 with the fixed plate 1 and the movable plate 2, ensuring the parallelism of the mold 9's mating surfaces. Pulling the locking rod 6 outwards causes the pressure block 8 to compress the spring 7, causing the spring 7 to contract. After the insertion rod 4 is pushed into place, the locking rod 6 is released, and the spring 7 loses its compressive force and begins to rebound, moving the pressure block 8. The lever 6 is moved and inserted into the slot 5 of the slot 3, where it engages and is fixed, thus fixing the mold 9 on the moving plate 2 and the fixed plate 1. When the mold 9 needs to be replaced, the outer end of the lever 6 is pulled outward, the spring 7 is compressed and contracted, and the inner end of the lever 6 is disengaged from the slot 5, releasing the constraint on the insert rod 4. At this time, the insert rod 4 can be directly pulled out along the direction of the slot 3 to complete the disassembly of the old mold 9. After replacing the new mold 9, the installation and positioning steps are repeated. The lever 6 is released, the spring 7 returns to its original position, and the lever 6 is pushed back into the slot 5 of the new insert rod 4 to achieve quick fixation.

[0027] refer to Figure 1 , Figure 2The injection molding mechanism includes a material tube 13, located on the right side of the fixed plate 1. A heater 14 is sleeved on the left side of the surface of the material tube 13. The heater 14 has a power of 3-6kW, a heating temperature range of 180-250℃, is adjustable, and has a heating zone length of 400-600mm, suitable for melting PP / PVDF and other plastic raw materials. A hopper 15 is located on the right side of the top of the material tube 13. A hydraulic actuator 16 is located on the right side of the material tube 13. A base 17 is located at the bottom of the hydraulic actuator 16 and the fixed plate 1. The top of the base 17 is located on the left side away from the center. A clamping mechanism 18 is bolted to the side. The clamping force of the clamping mechanism 18 is 500-2000kN, designed according to the number of mold cavities and the size of the plastic part. The mold opening stroke is 200-500mm to prevent mold overflow during high-pressure injection and ensure smooth demolding of the plastic part. The right side of the clamping mechanism 18 is bolted to the left side of the moving plate 2. A fixing bracket 19 is bolted to the top of the clamping mechanism 18 and the fixing plate 1. Through the setting of the injection mechanism, the hopper 15 is used to store plastic raw materials. The raw materials enter the inside of the material tube 13 under the action of gravity. The heater 1 on the surface of the material tube 13... 4. Heating occurs through heat conduction, raising the internal temperature of the material tube 13. As the raw material flows through the material tube 13, it is gradually heated to a molten state, preparing for subsequent injection molding. The base 17 serves as the supporting foundation for the entire mechanism, supporting components such as the material tube 13, hydraulic actuator 16, and clamping mechanism 18, ensuring the stability of each component's installation. The hydraulic actuator 16 provides driving force, pushing the molten plastic into the mold cavity 9 at high pressure and high speed. Simultaneously, the clamping mechanism 18 is activated, its right side bolted to the moving plate 2, driving the moving plate 2 towards the fixed plate 1 via mechanical transmission. The mold 9 moves to close tightly and provides sufficient clamping force to prevent the mold 9 parting surface from opening and overflowing when the high-pressure melt is injected. After the mold 9 cavity is filled with melt and cooled to a certain degree under pressure, the hydraulic device 16 stops working, the clamping mechanism 18 reverses, and drives the moving plate 2 away from the fixed plate 1, so that the mold 9 opens. After the mold opens, the plastic part falls into the collection box 10, completing one injection cycle. After that, all parts are reset, the hopper 15 continues to supply material to the material pipe 13, and the heater 14 maintains the working temperature, waiting for the next injection command.

[0028] refer to Figure 2 The top and bottom of the movable plate 2 are welded with slider 20. The top left side of the base 17 near the middle and the middle of the bottom of the fixed frame 19 are provided with a groove 21. The inside of the groove 21 is slidably connected to the surface of the slider 20. By setting slider 20 and groove 21, the movement of the movable plate 2 can be limited.

[0029] refer to Figure 2 A through groove 24 is provided on the right side of the mold 9 and the right side of the fixing plate 1. By providing the through groove 24, the molten material inside the material tube 13 can enter the internal cavity of the mold 9 through the through groove 24.

[0030] refer to Figure 1 , Figure 3 The outer end of the lever 6 is fixedly fitted with a handle 25, which makes it easy to pull the lever 6 outward.

[0031] Example 2: refer to Figure 1 , Figure 2 , Figure 4 A ball valve body injection molding device for easy and quick mold change. The unloading mechanism includes a collection box 10, which is located at the bottom of the mold 9. The collection box 10 has dimensions of 500-800mm (length) × 300-500mm (width) × 150-200mm (depth), is made of 304 stainless steel, and has a thickness of 1.5-2mm. Supports 11 are hinged to the front ends of both sides of the collection box 10, and a movable platform 12 is bolted to the bottom of the supports 11. An injection molding mechanism is located on the right side of the fixed plate 1. The collection box 10 is located directly below the bottom of the mold 9. When the injection-molded plastic part is demolded, it falls directly into the collection box 10. When the plastic parts in the collection box 10 accumulate to a certain amount, the moving table 12 is pulled to move the support 11 and the collection box 10 forward as a whole. Using the hinge structure between the collection box 10 and the support 11, the collection box 10 is flipped outward with the hinge points at both front ends as the axis of rotation. At this time, the opening of the collection box 10 is tilted downward, and the plastic parts inside slide out automatically under the action of gravity. A trolley and a box are placed at the bottom of the opening, and the plastic parts slide into the box to complete the unloading. After unloading, the collection box 10 is flipped in the opposite direction to reset to a horizontal state, and the moving table 12 is pushed back to the bottom of the mold 9 to start the next collection cycle.

[0032] refer to Figure 2 , Figure 4 The movable stage 12 has two sliders 22 welded on both sides. The bottom of both sides of the base 17 has a sliding groove 23, and the inside of the sliding groove 23 is slidably connected to the surface of the slider 22. By setting the slider 22 and the sliding groove 23, the movement of the movable stage 12 can be limited.

[0033] refer to Figure 1 A handle 26 is bolted to the front of the mobile platform 12, which makes it easy to pull out the mobile platform 12.

[0034] Brief description of the usage process: The fixed plate 1 and the movable plate 2 serve as the basic load-bearing components of the device. The slots 3 on their opposite sides provide precise guidance for the insert rod 4. When installing the mold 9, the insert rod 4, on which the mold 9 is fixed, is aligned with the slot 3 and pushed horizontally to achieve initial alignment of the mold 9 with the fixed plate 1 and the movable plate 2, ensuring the parallelism of the mold 9's mating surface. Pulling the locking rod 6 outward causes the pressure block 8 to compress the spring 7, causing the spring 7 to contract. After the insert rod 4 is pushed into place, the locking rod 6 is released, and the spring 7 loses its compressive force and begins to rebound, causing the pressure block 8 to move. The pressure block 8 then moves the locking rod 6, inserting it into the slot 5 of the slot 3 and engaging with it to fix the mold 9 on the movable plate 2 and the fixed plate 1. When the mold 9 needs to be replaced, the outer end of the locking rod 6 is pulled outward, the spring 7 is compressed and contracted, and the inner end of the locking rod 6 disengages from the slot 5, releasing the constraint on the insert rod 4. At this time, the insert rod 4 can be directly pulled out along the direction of the slot 3, completing the old mold replacement. After disassembling mold 9 and replacing it with a new mold 9, repeat the installation and positioning steps. Loosen the locking rod 6, and the spring 7 will reset and push the locking rod 6 to re-engage into the slot 5 of the new insert rod 4 to achieve quick fixation. The collection box 10 is located directly below the bottom of mold 9. When the injection-molded plastic parts are demolded, they fall directly into the collection box 10. When the plastic parts in the collection box 10 accumulate to a certain amount, the moving table 12 is pulled to move the support 11 and the collection box 10 forward as a whole. Using the hinge structure between the collection box 10 and the support 11, the collection box 10 is flipped outward with the hinge points at both front ends as the axis of rotation. At this time, the opening of the collection box 10 is tilted downward, and the plastic parts inside slide out automatically under the action of gravity. Place a trolley and a box at the bottom of the opening, and the plastic parts slide into the box to complete the unloading. After unloading, the collection box 10 is flipped back to the horizontal state, and the moving table 12 is pushed back to the bottom of mold 9 to start the next collection cycle.

[0035] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0036] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A ball valve housing injection molding device for easy and quick mold changing, comprising a fixing plate (1), characterized in that: A movable plate (2) is provided on the left side of the fixed plate (1). Slots (3) are provided on the front and rear ends of the top and bottom of the fixed plate (1) and the movable plate (2) opposite to each other. A rod (4) is slidably sleeved inside the slot (3). A slot (5) is provided on the opposite side of the rod (4) at one end. A locking rod (6) is slidably sleeved through the top and bottom of the front and back of the fixed plate (1) and the movable plate (2). The inner end of the locking rod (6) is locked inside the slot (5). A spring (7) is sleeved on the outer end of the surface of the locking rod (6). A pressure block (8) is fixedly sleeved on the inner end of the surface of the locking rod (6). A mold (9) is fixedly sleeved on the outer end of the rod (4). A material unloading mechanism is provided at the bottom of the mold (9).

2. The ball valve housing injection molding device for easy and quick mold changing according to claim 1, characterized in that: The unloading mechanism includes a collection box (10), which is located at the bottom of the mold (9). The front ends of both sides of the collection box (10) are hinged with brackets (11), and the bottom of the brackets (11) is bolted with a moving platform (12). An injection molding mechanism is provided on the right side of the fixed plate (1).

3. The ball valve housing injection molding device for easy and quick mold changing according to claim 2, characterized in that: The injection molding mechanism includes a material tube (13), which is located on the right side of the fixed plate (1). A heater (14) is sleeved on the left side of the surface of the material tube (13). A hopper (15) is provided on the right side of the top of the material tube (13). A hydraulic device (16) is provided on the right side of the material tube (13). A base (17) is provided at the bottom of the hydraulic device (16) and the fixed plate (1). A clamping mechanism (18) is bolted to the left side of the top of the base (17) away from the middle. The right side of the clamping mechanism (18) is bolted to the left side of the moving plate (2). A fixing frame (19) is bolted to the top of the clamping mechanism (18) and the fixed plate (1).

4. The ball valve housing injection molding device for quick mold change according to claim 3, characterized in that: The top and bottom of the movable plate (2) are welded with slider one (20), and the top of the base (17) near the middle left and the bottom of the fixed frame (19) are provided with a groove one (21), and the interior of the groove one (21) is slidably connected to the surface of slider one (20).

5. The ball valve housing injection molding device for quick mold change according to claim 3, characterized in that: The movable platform (12) has two sliders (22) welded on both sides. The bottom of the base (17) has two grooves (23) on both sides, and the inside of the grooves (23) is slidably connected to the surface of the sliders (22).

6. The ball valve housing injection molding device for quick mold change according to claim 3, characterized in that: A through slot (24) is provided through the right side of the mold (9) located on the right side and the right side of the fixing plate (1).

7. The ball valve housing injection molding device for quick mold change according to claim 1, characterized in that: The outer end of the lever (6) is fixedly fitted with a handle (25).

8. The ball valve housing injection molding device for quick mold change according to claim 2, characterized in that: A handle (26) is bolted to the front of the mobile platform (12).

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