Cooling device for production of injection-molded bottle caps

Abstract

The utility model discloses a cooling device for producing an injection molding bottle cap, which comprises a concentric-square-shaped base, a fixed mold, a plurality of groups of mold cavities, a demolding mechanism, a liquid storage cavity, a cooling flow channel, a liquid feeding mechanism and a refrigerating mechanism, and the top of the fixed mold is symmetrically provided with a plurality of groups of mold cavities. Compared with traditional equipment which only can mold one bottle cap during cooling and shaping of injection bottle caps each time, the device can perform injection molding in a plurality of mold cavities at a time, and the yield of the bottle caps in a single production period is remarkably increased; cooling liquid in the liquid storage cavity is conveyed into the cooling flow channel through the liquid conveying mechanism, formed bottle caps in the mold cavity are cooled, the surrounding type cooling flow channel design can make the cooling liquid make uniform contact with the mold cavity, efficient and uniform cooling is achieved, it is ensured that the quality of the bottle caps is stable in the cooling and shaping process, and the quality of the bottle caps is improved. The refrigeration mechanism adopts a semiconductor refrigeration sheet to refrigerate cooling liquid in a liquid storage cavity, and a stable low-temperature environment can be continuously provided for the cooling liquid.

Description

Technical Field

[0001] This utility model relates to the field of injection molded bottle cap cooling technology, specifically a cooling device for injection molded bottle cap production. Background Technology

[0002] In the field of plastic product processing, injection molding is widely used in various industries because it can efficiently and accurately produce plastic products with various complex shapes. Among them, bottle caps are one of the most common plastic products with huge market demand. In the production process of injection molded bottle caps, the cooling process is a crucial step, which directly affects the production efficiency, molding quality and subsequent performance of the bottle caps.

[0003] For example, a cooling and shaping device for mineral water bottle caps (publication number: CN220883205U) includes a fixed mold and a moving mold. A fixing block is fixedly connected to the bottom surface of the fixed mold. An annular cavity is formed inside the fixing block. An L-shaped water inlet pipe is fixedly connected to the upper right side of the inner wall of the annular cavity. Semiconductor cooling chips are fixedly connected to both sides of the top surface of the fixing block. Heat-conducting plates are fixedly connected to the bottom surfaces of the two semiconductor cooling chips. A water pump is fixedly connected to the left side of the top surface of the fixed mold. An annular cooling cavity is formed inside the fixed mold. This invention can quickly cool and shape injection-molded mineral water bottle caps, improving the production efficiency of the mold for mineral water bottle caps. Simultaneously, it can quickly demold the cooled and shaped mineral water bottle caps, reducing the workload of operators and preventing scratches on the mineral water bottle caps.

[0004] Based on the search of the aforementioned patents and the findings of existing equipment, it is known that the aforementioned equipment can only form one bottle cap per injection molding cycle, resulting in low production efficiency. When faced with the demands of large-scale production, it falls short. Furthermore, the spring plays a reset role during the demolding process. Over time, the elasticity of the spring will gradually decrease due to the periodic elastic deformation, leading to inaccurate reset and affecting the normal operation of the demolding mechanism. Therefore, we need to propose a cooling device for injection molding bottle cap production. Utility Model Content

[0005] The purpose of this invention is to provide a cooling device for injection molding bottle cap production to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A cooling device for injection molding bottle cap production includes a U-shaped base, a fixed mold, a mold cavity, a demolding mechanism, a liquid storage cavity, a cooling channel, a liquid delivery mechanism, and a refrigeration mechanism. The fixed mold is fixedly installed on the top of the U-shaped base. Several sets of mold cavities are symmetrically arranged and opened on the top of the fixed mold. The demolding mechanism is located in the middle of the U-shaped base and is used to demold the bottle caps that have been cooled and formed in the mold cavity.

[0008] The liquid storage cavity is located inside the U-shaped base, and the cooling channel is located inside the fixed mold and surrounds the outer wall of several sets of mold cavities. The coolant in the liquid storage cavity is transported to the cooling channel through the liquid delivery mechanism and cools the bottle caps formed in the mold cavity. The refrigeration mechanism is located on one side of the U-shaped base and is used to refrigerate the coolant in the liquid storage cavity.

[0009] Preferably, the demolding mechanism includes a cross-shaped base plate, on the top of which two sets of cylinders are symmetrically fixedly installed. A lifting plate is fixedly installed on the top of the two sets of cylinders. A push rod corresponding to several sets of mold cavities is fixedly installed on the top of the lifting plate. The top of the push rod extends through the fixed mold into the interior of the mold cavity and is fixedly installed with a demolding plate.

[0010] Preferably, two sets of telescopic rods are symmetrically fixedly installed on the top of the cross-shaped base plate, the top of the two sets of telescopic rods are fixedly connected to the bottom of the lifting plate, and the outer wall of the lifting plate is slidably connected to the inner wall of the U-shaped base.

[0011] Preferably, the liquid delivery mechanism includes a liquid pump, which is fixedly installed on one side wall of the U-shaped base by a bracket. The liquid inlet of the liquid pump is connected to the interior of the liquid storage chamber through a pipe, and the liquid outlet of the liquid pump is fixedly connected to a diversion pipe through a pipe. Several outlets of the diversion pipe are connected to liquid delivery pipes. One end of several sets of liquid delivery pipes passes through the fixed mold and is connected to the cooling channel. One end of the fixed mold located in the cooling channel is fixedly connected to several sets of drain pipes, and one end of each set of drain pipes passes through the U-shaped base and is connected to the liquid storage chamber.

[0012] Preferably, the cooling mechanism includes a semiconductor cooling chip, which is fixedly installed on one side of the U-shaped base, with the cold end of the semiconductor cooling chip extending into the interior of the liquid storage cavity, and the hot end of the semiconductor cooling chip being fixedly installed with heat dissipation fins.

[0013] Preferably, a cooling fan is provided on one side of the heat dissipation fins, and the cooling fan is fixedly installed to the side wall of the U-shaped base by a bracket.

[0014] Preferably, support rods are fixedly installed at the top four corners of the U-shaped base, and a top plate is fixedly installed on the top of the four sets of support rods. Two sets of electric telescopic rods are symmetrically fixedly installed at the bottom of the top plate. A lower pressure plate is fixedly installed at the output end of each set of electric telescopic rods. The lower pressure plate has through holes at its four corners and is slidably sleeved on the four sets of support rods. An injection hot runner plate is fixedly installed at the bottom of the lower pressure plate, and a moving mold corresponding to several sets of mold cavities is fixedly connected to the bottom of the injection hot runner plate.

[0015] Preferably, each of the moving molds has a hot runner inside, the injection hot runner plate has a hot runner channel inside that communicates with the hot runner inside the moving molds, and the top of the injection hot runner plate is fixedly connected to a connecting pipe, the top of the connecting pipe passing through the lower pressure plate and extending above the lower pressure plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The top of the mold of this utility model is symmetrically opened with several sets of mold cavities. By optimizing the mold structure design, compared with the traditional equipment that can only form one bottle cap each time the bottle cap is cooled and shaped, this device can perform injection molding in multiple mold cavities at one time, which significantly increases the bottle cap output in a single production cycle, can better meet the needs of large-scale production, and effectively improve production efficiency.

[0018] 2. This utility model utilizes a liquid delivery mechanism to transport the coolant in the storage chamber to the cooling channel to cool the molded bottle cap inside the mold cavity. This surrounding cooling channel design enables the coolant to contact the mold cavity evenly, achieving efficient and uniform cooling and ensuring the stable quality of the bottle cap during the cooling and shaping process. Moreover, the refrigeration mechanism uses a semiconductor refrigeration chip to cool the coolant in the storage chamber, which can continuously provide a stable low-temperature environment for the coolant, ensuring the durability and stability of the cooling effect.

[0019] 3. The demolding mechanism of this utility model adopts a cylinder-driven lifting plate, which drives the top rod and demolding plate to perform demolding operation. At the same time, the telescopic rod assists in supporting the lifting plate, and the outer wall of the lifting plate is slidably connected to the inner wall of the U-shaped base. This structural design makes the demolding process more stable and accurate, avoiding bottle cap damage or mold damage caused by unstable demolding, and improving product quality and production stability. Attached Figure Description

[0020] Figure 1 This is a side view of the three-dimensional structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal cooling channels and mold cavity of the mold of this utility model;

[0022] Figure 3This is a cross-sectional structural diagram of the spiral-shaped base and the fixed mold of this utility model;

[0023] Figure 4 This is a schematic diagram of the demolding mechanism of this utility model;

[0024] Figure 5 This is a schematic diagram of the liquid delivery mechanism and the spiral-shaped base of this utility model.

[0025] In the diagram: 1. U-shaped base; 2. Fixed mold; 3. Mold cavity; 4. Demolding mechanism; 41. Cross-shaped base plate; 42. Cylinder; 43. Lifting plate; 44. Ejector rod; 45. Demolding plate; 46. Telescopic rod; 5. Liquid storage chamber; 6. Cooling channel; 7. Liquid delivery mechanism; 71. Liquid pump; 72. Diverter pipe; 73. Liquid delivery pipe; 74. Drain pipe; 8. Refrigeration mechanism; 81. Semiconductor cooling chip; 82. Heat sink fins; 83. Cooling fan; 9. Support rod; 10. Top plate; 11. Electric telescopic rod; 12. Lower pressure plate; 13. Injection hot runner plate; 14. Moving mold; 15. Connecting pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 This utility model provides a technical solution:

[0028] A cooling device for injection molded bottle cap production includes a U-shaped base 1, a fixed mold 2, a mold cavity 3, a demolding mechanism 4, a liquid storage cavity 5, a cooling channel 6, a liquid delivery mechanism 7, and a cooling mechanism 8. The fixed mold 2 is fixedly installed on the top of the U-shaped base 1. Several sets of mold cavities 3 are symmetrically arranged and opened on the top of the fixed mold 2. The demolding mechanism 4 is located in the middle of the U-shaped base 1 and is used to demold the bottle caps that have been cooled and formed in the mold cavity 3.

[0029] The liquid storage chamber 5 is located inside the U-shaped base 1, and the cooling channel 6 is located inside the fixed mold 2 and surrounds the outer wall of several sets of mold cavities 3. The coolant in the liquid storage chamber 5 is delivered to the cooling channel 6 through the liquid delivery mechanism 7 and cools the bottle cap formed in the mold cavity 3. The refrigeration mechanism 8 is located on one side of the U-shaped base 1 and is used to refrigerate the coolant in the liquid storage chamber 5.

[0030] In an optional embodiment: the demolding mechanism 4 includes a cross-shaped base plate 41, two sets of cylinders 42 are symmetrically fixedly installed on the top of the cross-shaped base plate 41, a lifting plate 43 is fixedly installed on the top of the two sets of cylinders 42, and a push rod 44 corresponding to several sets of mold cavities 3 is fixedly installed on the top of the lifting plate 43. The top of the push rod 44 extends through the fixed mold 2 into the interior of the mold cavity 3 and is fixedly installed with a demolding plate 45.

[0031] It should be noted that cylinder 42 is a standard SC50x100 cylinder, which has the characteristics of large output force and stable operation. When the two sets of cylinders 42 are working, they push the lifting plate 43 to move up and down, providing power for demolding. The ejector rod 44 and the demolding plate 45 are made of hardened steel with chrome plating, which is wear-resistant and non-stick, improving the demolding success rate. The demolding plate 45 increases the contact area with the bottle cap, avoiding damage to the bottle cap due to excessive local force during demolding, thus improving the demolding success rate and product quality.

[0032] In an optional embodiment: two sets of telescopic rods 46 are symmetrically fixedly installed on the top of the cross-shaped base plate 41, the top of the two sets of telescopic rods 46 are fixedly connected to the bottom of the lifting plate 43, and the outer wall of the lifting plate 43 is slidably connected to the inner wall of the U-shaped base 1.

[0033] It should be noted that when the telescopic rod 46 works in conjunction with the inner wall of the U-shaped base 1 to lift and move the lifting plate 43, it plays an auxiliary support and guiding role, ensuring the stability of the lifting plate 43 during the up and down movement, making the demolding action more precise, reducing the frictional wear between the ejector rod 44 and the mold cavity 3 caused by shaking, extending the service life of the equipment, preventing the ejector rod 44 from tilting, and protecting the mold precision.

[0034] In an optional embodiment: the liquid delivery mechanism 7 includes a liquid pump 71, which is fixedly installed on one side wall of the U-shaped base 1 by a bracket. The liquid inlet of the liquid pump 71 is connected to the interior of the liquid storage chamber 5 through a pipe. The liquid outlet of the liquid pump 71 is fixedly connected to a diversion pipe 72 through a pipe. Several liquid outlets of the diversion pipe 72 are connected to liquid delivery pipes 73. One end of several sets of liquid delivery pipes 73 passes through the fixed mold 2 and is connected to the cooling channel 6. One end of the fixed mold 2 located in the cooling channel 6 is fixedly connected to several sets of drain pipes 74. One end of several sets of drain pipes 74 passes through the U-shaped base 1 and is connected to the liquid storage chamber 5.

[0035] It should be noted that the liquid pump 71 is a Grundfos MAGNA3 25-60 (variable frequency centrifugal pump), with adjustable flow rate (0.5-3 m³ / h), energy saving and noise level below 40 dB. The distribution pipe 72 and the liquid delivery pipe 73 are made of stainless steel, which is corrosion resistant. The inner wall is polished to reduce fluid resistance. The closed-loop circulation design (liquid storage chamber → liquid pump → cooling channel → liquid storage chamber) achieves efficient recovery of coolant and reduces water consumption. In addition, a liquid inlet is provided on one side of the U-shaped base 1. This circulating liquid delivery structure can continuously provide coolant to the cooling channel 6, ensuring the cooling effect on the molded bottle cap in the mold cavity 3. Moreover, the coolant can be recycled, saving resources.

[0036] In an optional embodiment: the cooling mechanism 8 includes a semiconductor cooling chip 81, which is fixedly installed on one side of the U-shaped base 1, and the cold end of the semiconductor cooling chip 81 extends into the interior of the liquid storage cavity 5, while the hot end of the semiconductor cooling chip 81 is fixedly installed with heat dissipation fins 82.

[0037] It should be noted that the semiconductor refrigeration chip 81 is model TEC1-12706. Its cold end is in direct contact with the coolant, and its temperature control accuracy is ±1℃. It has the advantages of fast cooling speed and no refrigerant pollution. The heat dissipation fins 82 increase the heat dissipation area, accelerate heat dissipation, and ensure the cooling efficiency of the semiconductor refrigeration chip 81.

[0038] In an optional embodiment, a cooling fan 83 is provided on one side of the heat dissipation fins 82, and the cooling fan 83 is fixedly installed on the side wall of the U-shaped base 1 by means of a bracket.

[0039] It should be noted that the cooling fan 83 is a DC cooling fan with model number 9G2212H101. This fan has the characteristics of high air pressure and large air volume, which can quickly remove the heat from the heat sink 82, maintain the heat dissipation requirements of the hot end of the semiconductor cooling chip 81, and ensure the stable operation of the cooling mechanism 8.

[0040] In an optional embodiment: support rods 9 are fixedly installed at the top four corners of the U-shaped base 1, and a top plate 10 is fixedly installed on the top of the four sets of support rods 9. Two sets of electric telescopic rods 11 are symmetrically fixedly installed at the bottom of the top plate 10. A lower pressure plate 12 is fixedly installed at the output end of the two sets of electric telescopic rods 11. The lower pressure plate 12 has through holes at its four corners and is slidably sleeved on the four sets of support rods 9. An injection hot runner plate 13 is fixedly installed at the bottom of the lower pressure plate 12. A moving mold 14 corresponding to several sets of mold cavities 3 is fixedly connected to the bottom of the injection hot runner plate 13.

[0041] It should be noted that the electric telescopic rod 11 is a Yamaha EGS-C10 (servo electric cylinder) with a repeatability of ±0.02mm, achieving precise mold closing. The moving mold 14 cooperates with the fixed mold 2, and under the drive of the electric telescopic rod 11, the mold opening and closing action is realized to complete the injection molding process. The injection hot runner 13 (with built-in heating rods optional) works in conjunction with the hot runner of the moving mold 14 (HASCO standard) to reduce molten material cold glue and improve injection molding quality.

[0042] In an optional embodiment: each of the several sets of moving molds 14 is provided with a hot runner, the injection hot runner plate 13 is provided with a hot runner channel that communicates with the hot runner channels inside the several sets of moving molds 14, and the top of the injection hot runner plate 13 is fixedly connected to a connecting pipe 15, the top of the connecting pipe 15 passes through the lower pressure plate 12 and extends to the top of the lower pressure plate 12.

[0043] It should be noted that the hot runner system can ensure the uniform temperature of the plastic melt during the injection molding process, reduce waste generation, and improve injection molding efficiency and product quality. The connecting pipe 15 is used to connect to external injection molding equipment to transport molten plastic to the hot runner.

[0044] Working principle: When this utility model is in use, the electric telescopic rod 11 is activated, pushing the lower pressure plate 12 down along the support rod 9, which drives the injection hot runner plate 13 and the moving mold 14 to move down, so that the moving mold 14 and the mold cavity 3 of the fixed mold 2 are precisely fitted. The external injection molding equipment injects the plastic melt into the hot runner channel of the injection hot runner plate 13 through the connecting pipe 15, and then evenly injects it into each mold cavity 3 through the hot runner channel inside the moving mold 14 to complete the injection molding operation.

[0045] When the liquid pump 71 in the liquid delivery mechanism 7 is turned on, it draws coolant from the liquid storage chamber 5. After being split by the diversion pipe 72, it is delivered to the cooling channel 6 surrounding the outer wall of the mold cavity 3 through the liquid delivery pipe 73 to cool the high-temperature plastic bottle cap in the mold cavity 3. After absorbing heat, the coolant flows back to the liquid storage chamber 5 through the drain pipe 74. At the same time, the cold end of the semiconductor cooling chip 81 of the refrigeration mechanism 8 continuously cools the coolant in the liquid storage chamber 5, and the heat dissipation fins 82 at the hot end, together with the cooling fan 83, dissipate the heat to maintain the coolant at a low temperature and ensure the cooling effect.

[0046] After the bottle cap cools and solidifies, cylinder 42 is activated, pushing lifting plate 43 upward. Telescopic rod 46 assists in supporting the stable movement of lifting plate 43. Lifting plate 43 drives ejector rod 44 and demolding plate 45 upward. Demolding plate 45 ejects the bottle cap formed in mold cavity 3, completing the demolding operation. Subsequently, electric telescopic rod 11 retracts, driving lower pressure plate 12, injection hot runner plate 13 and moving mold 14 to move upward and reset, preparing for the next injection cycle.

[0047] The control method in this application is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, this application is mainly used to protect the structure and shape and their combination, so the control method and circuit connection will not be explained in detail in this application.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling device for injection molding bottle cap production, characterized in that, It includes a U-shaped base (1), a fixed mold (2), a mold cavity (3), a demolding mechanism (4), a liquid storage cavity (5), a cooling channel (6), a liquid delivery mechanism (7), and a refrigeration mechanism (8). The fixed mold (2) is fixedly installed on the top of the U-shaped base (1). Several sets of mold cavities (3) are symmetrically arranged. Several sets of mold cavities (3) are opened on the top of the fixed mold (2). The demolding mechanism (4) is located in the middle of the U-shaped base (1) and is used to demold the bottle cap after it has been cooled and formed in the mold cavity (3). The liquid storage cavity (5) is located inside the U-shaped base (1), the cooling channel (6) is located inside the fixed mold (2) and surrounds the outer wall of several sets of mold cavities (3). The coolant in the liquid storage cavity (5) is transported to the cooling channel (6) through the liquid delivery mechanism (7) and cools the molded bottle cap in the mold cavity (3). The refrigeration mechanism (8) is located on one side of the U-shaped base (1) and is used to refrigerate the coolant in the liquid storage cavity (5).

2. The cooling device for injection molding bottle cap production according to claim 1, characterized in that: The demolding mechanism (4) includes a cross-shaped base plate (41). Two sets of cylinders (42) are symmetrically fixedly installed on the top of the cross-shaped base plate (41). A lifting plate (43) is fixedly installed on the top of the two sets of cylinders (42). A push rod (44) corresponding to several sets of mold cavities (3) is fixedly installed on the top of the lifting plate (43). The top of the push rod (44) extends through the fixed mold (2) into the interior of the mold cavity (3) and is fixedly installed with a demolding plate (45).

3. A cooling device for injection molding bottle cap production according to claim 2, characterized in that: The top of the cross-shaped base plate (41) is symmetrically fixedly equipped with two sets of telescopic rods (46). The top of the two sets of telescopic rods (46) is fixedly connected to the bottom of the lifting plate (43), and the outer wall of the lifting plate (43) is slidably connected to the inner wall of the spiral base (1).

4. A cooling device for injection molding bottle cap production according to claim 1, characterized in that: The liquid delivery mechanism (7) includes a liquid pump (71), which is fixedly installed on one side wall of the U-shaped base (1) by a bracket. The liquid inlet of the liquid pump (71) is connected to the inside of the liquid storage chamber (5) through a pipe. The liquid outlet of the liquid pump (71) is fixedly connected to a diversion pipe (72) through a pipe. Several liquid outlets of the diversion pipe (72) are connected to liquid delivery pipes (73). One end of several sets of liquid delivery pipes (73) passes through the fixed mold (2) and is connected to the cooling channel (6). One end of the fixed mold (2) located in the cooling channel (6) is fixedly connected to several sets of drain pipes (74). One end of several sets of drain pipes (74) passes through the U-shaped base (1) and is connected to the liquid storage chamber (5).

5. A cooling device for injection molding bottle cap production according to claim 1, characterized in that: The refrigeration mechanism (8) includes a semiconductor refrigeration chip (81), which is fixedly installed on one side of the U-shaped base (1), and the cold end of the semiconductor refrigeration chip (81) extends into the interior of the liquid storage chamber (5). The hot end of the semiconductor refrigeration chip (81) is fixedly installed with heat dissipation fins (82).

6. A cooling device for injection molding bottle cap production according to claim 5, characterized in that: A cooling fan (83) is provided on one side of the heat dissipation fins (82), and the cooling fan (83) is fixedly installed on the side wall of the U-shaped base (1) by means of a bracket.

7. A cooling device for injection molding bottle cap production according to claim 1, characterized in that: Support rods (9) are fixedly installed at the top four corners of the base (1). A top plate (10) is fixedly installed on the top of the four sets of support rods (9). Two sets of electric telescopic rods (11) are symmetrically fixedly installed at the bottom of the top plate (10). A lower pressure plate (12) is fixedly installed at the output end of the two sets of electric telescopic rods (11). The lower pressure plate (12) has through holes at the four corners and is slidably sleeved on the four sets of support rods (9). An injection hot runner plate (13) is fixedly installed at the bottom of the lower pressure plate (12). A moving mold (14) corresponding to several sets of mold cavities (3) is fixedly connected to the bottom of the injection hot runner plate (13).

8. A cooling device for injection molding bottle cap production according to claim 7, characterized in that: The interior of each of the moving molds (14) is provided with a hot runner, and the interior of the injection hot runner plate (13) is provided with a hot runner channel that communicates with the hot runner channels inside the moving molds (14). The top of the injection hot runner plate (13) is fixedly connected to a connecting pipe (15), the top of which passes through the lower pressure plate (12) and extends to the top of the lower pressure plate (12).

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