CN223961675U - Cooling device is used in production of bottle lid of moulding plastics - Google Patents

Abstract

This utility model discloses a cooling device for injection molding bottle cap production, including 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 has several sets of mold cavities symmetrically arranged on its top. By optimizing the mold structure design, compared to traditional equipment that can only form one bottle cap per injection molding cycle, this device can perform injection molding in multiple cavities at once, significantly increasing the bottle cap output per production cycle. The liquid delivery mechanism transports the coolant from the liquid storage cavity to the cooling channel to cool the formed bottle caps within the mold cavity. This surrounding cooling channel design ensures that the coolant contacts the mold cavity evenly, achieving efficient and uniform cooling and ensuring stable quality of the bottle caps during the cooling and shaping process. The refrigeration mechanism uses a semiconductor cooling chip to cool the coolant in the liquid storage cavity, continuously providing a stable low-temperature environment for the coolant.

Description

Cooling device is used in production of bottle lid of moulding plastics

Technical Field

The utility model relates to the technical field of injection molding bottle cap cooling, in particular to a cooling device for injection molding bottle cap production.

Background

In the field of plastic product processing, the injection molding process can efficiently and accurately produce various plastic products with complex shapes, and is widely applied to various industries, wherein the bottle cap is one of common plastic products, the market demand is huge, in the production process of injection molding the bottle cap, a cooling link is a crucial step, and the production efficiency, the molding quality and the subsequent use performance of the bottle cap are directly affected.

For example, a mineral water bucket bottle cap cooling and shaping device (bulletin number: CN 220883205U) comprises a fixed die and a movable die, wherein the bottom surface of the fixed die is fixedly connected with a fixed block, an annular cavity is formed in the fixed block, an L-shaped water adding pipe is fixedly connected above the right side of the inner wall of the annular cavity, semiconductor refrigerating sheets are fixedly connected to the left side and the right side of the top surface of the fixed block, heat conducting plates are fixedly connected to the bottom surfaces of the two semiconductor refrigerating sheets, a water pump is fixedly connected to the left side of the top surface of the fixed die, and an annular cooling cavity is formed in the fixed die. The utility model can rapidly cool and shape the injection molding mineral water bucket bottle cap, improves the production efficiency of the mold on the mineral water bucket bottle cap, simultaneously can rapidly demold the cooling and shaping mineral water bucket bottle cap, reduces the workload of operators, and avoids the mineral water bucket bottle cap from being scratched.

Based on the searching of the patent and combining the device discovery in the prior art, the device can only form one bottle cap during the cooling and shaping of the injection molding bottle cap each time when in use, has lower production efficiency, is not attractive when facing the requirement of mass production, and the spring plays a reset role in the demolding process, bears the periodical elastic deformation for a long time, the elasticity of the spring can be gradually reduced, the reset is inaccurate, and the normal operation of a demolding mechanism is influenced, so that the cooling device for the injection molding bottle cap production needs to be provided.

Disclosure of utility model

The utility model aims to provide a cooling device for producing injection molding bottle caps, which aims to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The cooling device for producing the injection molding bottle cap comprises a square base, a fixed die, a die cavity, a demoulding mechanism, a liquid storage cavity, a cooling runner, a liquid conveying mechanism and a refrigerating mechanism, wherein the fixed die is fixedly arranged at the top of the square base, a plurality of groups of die cavities are symmetrically arranged, the die cavities are arranged at the top of the fixed die, and the demoulding mechanism is arranged in the middle of the square base and is used for demoulding the bottle cap after cooling and forming in the die cavities;

The liquid storage cavity is arranged in the interior of the square base, the cooling flow channel is arranged in the interior of the fixed die and surrounds the outer walls of the plurality of groups of die cavities, cooling liquid in the liquid storage cavity is conveyed into the cooling flow channel through the liquid conveying mechanism and cools the die cavity inner forming bottle cap, and the refrigerating mechanism is arranged on one side of the square base and used for refrigerating the cooling liquid in the liquid storage cavity.

Preferably, the demolding mechanism comprises a cross-shaped bottom plate, two groups of air cylinders are symmetrically and fixedly arranged at the top of the cross-shaped bottom plate, lifting plates are fixedly arranged at the tops of the two groups of air cylinders, ejector rods corresponding to a plurality of groups of mold cavities are fixedly arranged at the tops of the lifting plates, and the top of each ejector rod penetrates through the fixed mold to extend to the inside of the mold cavity and is fixedly provided with a demolding plate.

Preferably, the top of the cross-shaped bottom plate is symmetrically and fixedly provided with two groups of telescopic rods, the tops of the two groups of telescopic rods are fixedly connected with the bottom of the lifting plate, and the outer wall of the lifting plate is in sliding connection with the inner wall of the square base.

Preferably, the liquid feeding mechanism comprises a liquid pump, the liquid pump passes through support fixed mounting on one side lateral wall of return shape base, the feed liquor end of liquid pump passes through the inside intercommunication in pipeline and stock solution chamber, the play liquid end of liquid pump has the shunt tubes through the fixed intercommunication of pipeline, a plurality of liquid outlets of shunt tubes all communicate and have the liquid feeding pipe, a plurality of groups the one end of liquid feeding pipe runs through fixed mould and cooling runner intercommunication, the cover half utensil is located the fixed intercommunication of one end of cooling runner and has a plurality of groups fluid-discharge tube, and the one end of a plurality of groups fluid-discharge tube all runs through return shape base and stock solution chamber intercommunication.

Preferably, the refrigerating mechanism comprises a semiconductor refrigerating sheet fixedly arranged on one side of the rectangular base, the cold end of the semiconductor refrigerating sheet extends to the inside of the liquid storage cavity, and the hot end of the semiconductor refrigerating sheet is fixedly provided with a radiating fin.

Preferably, a cooling fan is arranged on one side of the cooling fin, and the cooling fan is fixedly arranged on the side wall of the rectangular base through a bracket.

Preferably, the top four corners department of returning shape base is all fixed mounting has the bracing piece, four sets of the top fixed mounting of bracing piece has the roof, the bottom of roof is symmetrical fixed mounting has two sets of electric telescopic handle, two sets of the equal fixed mounting of output of electric telescopic handle has the holding down plate, and the four corners of holding down plate is equipped with the through-hole and the slip cap locates on four sets of bracing pieces, the bottom fixed mounting of holding down plate has the hot flow board of moulding plastics, the bottom fixedly connected with of hot flow board of moulding plastics is with the corresponding movable mould of a plurality of groups mould chamber.

Preferably, the inside of a plurality of groups of movable mould all is equipped with the hot runner, and the inside of moulding plastics the hot runner of hot runner board is equipped with the hot runner with the inside hot runner intercommunication of a plurality of groups of movable mould, and the fixed intercommunication in top of moulding plastics the hot runner board has the connecting pipe, the top of connecting pipe runs through the holding down plate and extends to the top of holding down plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the utility model, the top of the fixed die is symmetrically provided with a plurality of groups of die cavities, and the structural design of the die is optimized, so that compared with the traditional equipment for only forming one bottle cap by cooling and shaping the injection-molded bottle cap each time, the device can perform injection molding in a plurality of die cavities at one time, thereby remarkably increasing the yield of the bottle cap in a single production period, better meeting the requirement of large-scale production and effectively improving the production efficiency;

2. According to the utility model, the liquid feeding mechanism is used for conveying the cooling liquid in the liquid storage cavity into the cooling flow channel, the bottle cap formed in the die cavity is cooled, the surrounding cooling flow channel can enable the cooling liquid to be uniformly contacted with the die cavity, high-efficiency and uniform cooling is realized, the bottle cap is ensured to be stable in quality in the cooling and shaping process, and the refrigerating mechanism adopts the semiconductor refrigerating sheet to refrigerate the cooling liquid in the liquid storage cavity, so that a stable low-temperature environment can be continuously provided for the cooling liquid, and the durability and stability of a cooling effect are ensured;

3. According to the demolding mechanism disclosed by the utility model, the lifting plate is driven by the air cylinder, the lifting plate drives the ejector rod and the demolding plate to perform demolding operation, meanwhile, the lifting plate is supported by the telescopic rod in an auxiliary manner, the outer wall of the lifting plate is in sliding connection with the inner wall of the rectangular base, the demolding process is more stable and accurate due to the structural design, the problem of bottle cap damage or mold damage caused by unstable demolding is avoided, and the product quality and the production stability are improved.

Drawings

FIG. 1 is a schematic side view of a three-dimensional structure of the present utility model;

FIG. 2 is a schematic view of the internal cooling runner and cavity of the fixed mold of the present utility model;

FIG. 3 is a schematic diagram of a cross-sectional structure of the rectangular base and the fixed mold of the utility model;

FIG. 4 is a schematic view of the demolding mechanism of the present utility model;

FIG. 5 is a schematic diagram of the liquid feeding mechanism and the rectangular base of the present utility model.

In the drawing, 1, a square base, 2, a fixed die, 3, a die cavity, 4, a demoulding mechanism, 41, a cross-shaped bottom plate, 42, an air cylinder, 43, a lifting plate, 44, a push rod, 45, a demoulding plate, 46, a telescopic rod, 5, a liquid storage cavity, 6, a cooling runner, 7, a liquid feeding mechanism, 71, a liquid pump, 72, a shunt pipe, 73, a liquid feeding pipe, 74, a liquid discharging pipe, 8, a refrigerating mechanism, 81, a semiconductor refrigerating sheet, 82, a radiating fin, 83, a radiating fan, 9, a supporting rod, 10, a top plate, 11, an electric telescopic rod, 12, a lower pressing plate, 13, an injection molding heat flow plate, 14, a movable die, 15 and a connecting pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides a technical solution:

the cooling device for producing the injection molding bottle cap comprises a square base 1, a fixed die 2, a die cavity 3, a demoulding mechanism 4, a liquid storage cavity 5, a cooling runner 6, a liquid feeding mechanism 7 and a refrigerating mechanism 8, wherein the fixed die 2 is fixedly arranged at the top of the square base 1, the die cavity 3 is symmetrically provided with a plurality of groups, the die cavities 3 of the groups are arranged at the top of the fixed die 2, and the demoulding mechanism 4 is arranged in the middle of the square base 1 and is used for demoulding the bottle cap after cooling and forming in the die cavity 3;

The liquid storage cavity 5 is arranged in the interior of the square base 1, the cooling flow channel 6 is arranged in the interior of the fixed die 2 and surrounds the outer walls of the plurality of groups of die cavities 3, cooling liquid in the liquid storage cavity 5 is conveyed into the cooling flow channel 6 through the liquid conveying mechanism 7 and cools the forming bottle cap in the die cavity 3, and the refrigerating mechanism 8 is arranged on one side of the square base 1 and used for refrigerating the cooling liquid in the liquid storage cavity 5.

In an alternative embodiment, the demolding mechanism 4 comprises a cross-shaped bottom plate 41, two groups of air cylinders 42 are symmetrically and fixedly arranged at the top of the cross-shaped bottom plate 41, a lifting plate 43 is fixedly arranged at the top of the two groups of air cylinders 42, ejector rods 44 corresponding to a plurality of groups of mold cavities 3 are fixedly arranged at the top of the lifting plate 43, and the top of each ejector rod 44 extends to the inside of each mold cavity 3 through the fixed mold 2 and is fixedly provided with a demolding plate 45.

It should be noted that, the air cylinder 42 is a standard air cylinder with the model of SC50x100, the air cylinder has the characteristics of large output force and stable operation, the two groups of air cylinders 42 push the lifting plate 43 to move up and down during operation to provide power for demolding, the ejector rod 44 and the demolding plate 45 are made of quenched steel, the surface is chromed, wear-resistant and anti-sticking, the demolding success rate is improved, the contact area between the demolding plate 45 and the bottle cap is increased, the bottle cap is prevented from being damaged due to overlarge local stress during demolding, and the demolding success rate and the product quality are improved.

In an alternative embodiment, two groups of telescopic rods 46 are symmetrically and fixedly arranged at the top of the cross-shaped bottom plate 41, the tops of the two groups of telescopic rods 46 are fixedly connected with the bottom of the lifting plate 43, and the outer wall of the lifting plate 43 is in sliding connection with the inner wall of the square base 1.

It should be noted that, when the inner wall of the telescopic rod 46 is matched with the square base 1 to lift and move the lifting plate 43, the auxiliary supporting and guiding functions are achieved, the stability of the lifting plate 43 in the up-and-down moving process is ensured, the demolding action is more accurate, the friction loss between the ejector rod 44 and the mold cavity 3 caused by shaking is reduced, the service life of the equipment is prolonged, the ejector rod 44 is prevented from deflecting, and the mold precision is protected.

In an alternative embodiment, the liquid feeding mechanism 7 comprises a liquid pump 71, the liquid pump 71 is fixedly arranged on one side wall of the square base 1 through a bracket, a liquid inlet end of the liquid pump 71 is communicated with the inside of the liquid storage cavity 5 through a pipeline, a liquid outlet end of the liquid pump 71 is fixedly communicated with a shunt pipe 72 through a pipeline, a plurality of liquid outlets of the shunt pipe 72 are all communicated with a liquid feeding pipe 73, one ends of a plurality of groups of liquid feeding pipes 73 penetrate through the fixed die 2 and are communicated with the cooling flow channel 6, one ends of the fixed die 2, which are positioned on the cooling flow channel 6, are fixedly communicated with a plurality of groups of liquid discharging pipes 74, and one ends of a plurality of groups of liquid discharging pipes 74 penetrate through the square base 1 and are communicated with the liquid storage cavity 5.

It should be noted that, the liquid pump 71 selects gram-rich MAGNA (variable frequency centrifugal pump) 3-60, the flow is adjustable (0.5-3 m 3/h), the energy is saved, the noise is lower than 40dB, the shunt tube 72 and the liquid feeding tube 73 are made of stainless steel, the corrosion resistance is realized, the fluid resistance is reduced by the inner wall polishing treatment, the efficient recovery of the cooling liquid is realized by the closed loop circulation design (liquid storage cavity, liquid pump, cooling flow passage and liquid storage cavity), the water consumption is reduced, and the liquid feeding port is arranged above one side of the square base 1, and the circulation type liquid feeding structure can continuously provide the cooling liquid for the cooling flow passage 6, the cooling effect on the formed bottle cap in the die cavity 3 is ensured, the cooling liquid can be recycled, and the resources are saved.

In an alternative embodiment, the refrigerating mechanism 8 comprises a semiconductor refrigerating plate 81, the semiconductor refrigerating plate 81 is fixedly arranged on one side of the square base 1, the cold end of the semiconductor refrigerating plate 81 extends to the inside of the liquid storage cavity 5, and the heat end of the semiconductor refrigerating plate 81 is fixedly provided with a radiating fin 82.

The semiconductor refrigerating plate 81 is TEC1-12706, the cold end is in direct contact with the cooling liquid, the temperature control precision is +/-1 ℃, the semiconductor refrigerating plate has the advantages of being high in refrigerating speed, free of refrigerant pollution and the like, the radiating fins 82 increase the radiating area, heat dissipation is accelerated, and the refrigerating efficiency of the semiconductor refrigerating plate 81 is guaranteed.

In an alternative embodiment, a radiator fan 83 is provided on one side of the radiator fin 82, and the radiator fan 83 is fixedly mounted to the side wall of the rectangular base 1 through a bracket.

It should be noted that, the cooling fan 83 is a dc cooling fan with a model of 9G2212H101, and the fan has the characteristics of high wind pressure and large wind volume, and can rapidly take away the heat on the cooling fin 82, so as to maintain the heat dissipation requirement of the heat end of the semiconductor cooling fin 81, and ensure the stable operation of the refrigerating mechanism 8.

In an alternative embodiment, the four corners of the top of the square base 1 are fixedly provided with supporting rods 9, the tops of the four groups of supporting rods 9 are fixedly provided with a top plate 10, the bottoms of the top plate 10 are symmetrically and fixedly provided with two groups of electric telescopic rods 11, the output ends of the two groups of electric telescopic rods 11 are fixedly provided with a lower pressing plate 12, the four corners of the lower pressing plate 12 are provided with through holes and are sleeved on the four groups of supporting rods 9 in a sliding manner, the bottoms of the lower pressing plate 12 are fixedly provided with injection molding heat flow plates 13, and the bottoms of the injection molding heat flow plates 13 are fixedly connected with movable dies 14 corresponding to the groups of mold cavities 3.

The model of the electric telescopic rod 11 is selected from a Jacha EGS-C10 (servo electric cylinder), the repeated positioning precision is +/-0.02 mm, the accurate die assembly is realized, the movable die 14 is matched with the fixed die 2, the die opening and closing actions are realized under the driving of the electric telescopic rod 11, the injection molding process is finished, the injection molding heat flow plate 13 (a heating rod can be selected according to the requirement) is matched with a hot runner (HASCO standard) of the movable die 14, the melting cold glue is reduced, and the injection molding quality is improved.

In an alternative embodiment, the inner parts of the plurality of groups of movable moulds 14 are respectively provided with a hot runner, the inner part of the injection molding hot runner plate 13 is provided with a hot runner communicated with the hot runners of the inner parts of the plurality of groups of movable moulds 14, the top of the injection molding hot runner plate 13 is fixedly communicated with a connecting pipe 15, and the top of the connecting pipe 15 penetrates through the lower pressing plate 12 and extends to the upper part of the lower pressing plate 12.

It should be noted that, the hot runner system can ensure that the temperature of the plastic melt is even in the injection molding process, reduces the waste material and produces, improves injection molding efficiency and product quality, and connecting pipe 15 is used for connecting outside injection molding equipment, carries molten plastic for the hot runner.

The working principle of the utility model is that when the utility model is used, the electric telescopic rod 11 is started, the lower pressing plate 12 is pushed to slide downwards along the supporting rod 9, the injection molding heat flow plate 13 and the movable mould 14 are driven to move downwards, the movable mould 14 is precisely attached to the mould cavity 3 of the fixed mould 2, the external injection molding equipment injects plastic melt into the heat flow channel of the injection molding heat flow plate 13 through the connecting pipe 15, and then evenly injects the plastic melt into each mould cavity 3 through the heat flow channel in the movable mould 14, thus completing the injection molding operation;

The liquid pump 71 in the liquid feeding mechanism 7 is started, cooling liquid is pumped from the liquid storage cavity 5, is split by the split pipe 72 and is conveyed into the cooling flow channel 6 surrounding the outer wall of the die cavity 3 through the liquid feeding pipe 73, the high-temperature plastic bottle cap in the die cavity 3 is cooled, the cooling liquid is returned to the liquid storage cavity 5 through the liquid discharge pipe 74 after absorbing heat, meanwhile, the cold end of the semiconductor refrigeration sheet 81 of the refrigeration mechanism 8 continuously refrigerates the cooling liquid in the liquid storage cavity 5, the heat dissipation fin 82 at the hot end is matched with the heat dissipation fan 83 to dissipate the heat, the low-temperature state of the cooling liquid is maintained, and the cooling effect is ensured;

After the bottle cap is cooled and formed, the air cylinder 42 is started to push the lifting plate 43 to rise, the telescopic rod 46 assists in supporting the lifting plate 43 to stably move, the lifting plate 43 drives the ejector rod 44 and the stripper plate 45 to rise, the stripper plate 45 ejects the bottle cap formed in the die cavity 3 to finish the demolding operation, and then the electric telescopic rod 11 is contracted to drive the lower pressing plate 12, the injection molding heat flow plate 13 and the movable die 14 to move upwards and reset, so that the next injection molding cycle is ready to be carried out.

The control mode in the present document is automatically controlled by the controller, the control circuit of the controller can be realized by simple programming by a person skilled in the art, and the present document is mainly used for protecting the structure, the shape and the combination thereof, so the present document does not explain the control mode and the circuit connection in detail.

Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The cooling device for the injection molding bottle cap production is characterized by comprising a square base (1), a fixed die (2), a die cavity (3), a demolding mechanism (4), a liquid storage cavity (5), a cooling runner (6), a liquid feeding mechanism (7) and a refrigerating mechanism (8), wherein the fixed die (2) is fixedly arranged at the top of the square base (1), the die cavity (3) is symmetrically provided with a plurality of groups, the die cavity (3) is arranged at the top of the fixed die (2), and the demolding mechanism (4) is arranged in the middle of the square base (1) and is used for demolding the bottle cap after cooling molding in the die cavity (3);

the liquid storage cavity (5) is formed in the interior of the square base (1), the cooling flow channel (6) is formed in the interior of the fixed die (2) and surrounds the outer walls of the plurality of groups of die cavities (3), cooling liquid in the liquid storage cavity (5) is conveyed into the cooling flow channel (6) through the liquid conveying mechanism (7) and cools a forming bottle cap in the die cavity (3), and the refrigerating mechanism (8) is arranged on one side of the square base (1) and used for refrigerating the cooling liquid in the liquid storage cavity (5).

2. The cooling device for producing injection molded bottle caps according to claim 1, wherein the demolding mechanism (4) comprises a cross-shaped bottom plate (41), two groups of air cylinders (42) are symmetrically and fixedly arranged at the top of the cross-shaped bottom plate (41), lifting plates (43) are fixedly arranged at the tops of the two groups of air cylinders (42), ejector rods (44) corresponding to a plurality of groups of mold cavities (3) are fixedly arranged at the tops of the lifting plates (43), and the tops of the ejector rods (44) penetrate through the fixed mold (2) to extend into the mold cavities (3) and are fixedly provided with demolding plates (45).

3. The cooling device for producing injection molded bottle caps according to claim 2, wherein the top of the cross-shaped bottom plate (41) is symmetrically and fixedly provided with two groups of telescopic rods (46), the tops of the two groups of telescopic rods (46) are fixedly connected with the bottom of the lifting plate (43), and the outer wall of the lifting plate (43) is in sliding connection with the inner wall of the square base (1).

4. The cooling device for producing injection molding bottle caps according to claim 1, wherein the liquid feeding mechanism (7) comprises a liquid pump (71), the liquid pump (71) is fixedly arranged on one side wall of the square base (1) through a support, a liquid inlet end of the liquid pump (71) is communicated with the inside of the liquid storage cavity (5) through a pipeline, a liquid outlet end of the liquid pump (71) is fixedly communicated with a shunt pipe (72) through a pipeline, a plurality of liquid outlets of the shunt pipe (72) are communicated with liquid feeding pipes (73), one ends of a plurality of groups of liquid feeding pipes (73) penetrate through a fixed die (2) and are communicated with a cooling runner (6), one ends of the fixed die (2) are fixedly communicated with a plurality of groups of liquid discharging pipes (74), and one ends of the plurality of groups of liquid discharging pipes (74) penetrate through the square base (1) and are communicated with the liquid storage cavity (5).

5. The cooling device for producing injection molded bottle caps according to claim 1, wherein the refrigerating mechanism (8) comprises a semiconductor refrigerating piece (81), the semiconductor refrigerating piece (81) is fixedly arranged on one side of the square base (1), the cold end of the semiconductor refrigerating piece (81) extends to the inside of the liquid storage cavity (5), and the hot end of the semiconductor refrigerating piece (81) is fixedly provided with a radiating fin (82).

6. The cooling device for producing injection molded bottle caps according to claim 5, wherein a cooling fan (83) is provided on one side of the cooling fin (82), and the cooling fan (83) is fixedly mounted on the side wall of the rectangular base (1) through a bracket.

7. The cooling device for producing injection molding bottle caps according to claim 1, wherein supporting rods (9) are fixedly installed at four corners of the top of the square base (1), top plates (10) are fixedly installed at the tops of the four groups of supporting rods (9), two groups of electric telescopic rods (11) are symmetrically and fixedly installed at the bottoms of the top plates (10), lower pressing plates (12) are fixedly installed at the output ends of the two groups of electric telescopic rods (11), through holes are formed in four corners of the lower pressing plates (12) and are sleeved on the four groups of supporting rods (9) in a sliding mode, injection molding heat flow plates (13) are fixedly installed at the bottoms of the lower pressing plates (12), and movable dies (14) corresponding to the groups of mold cavities (3) are fixedly connected to the bottoms of the injection molding heat flow plates (13).

8. The cooling device for producing injection molded bottle caps according to claim 7, wherein the inner parts of the plurality of groups of movable molds (14) are respectively provided with a hot runner, the inner part of the injection molding hot runner plate (13) is provided with a hot runner communicated with the hot runners in the plurality of groups of movable molds (14), the top of the injection molding hot runner plate (13) is fixedly communicated with a connecting pipe (15), and the top of the connecting pipe (15) penetrates through the lower pressing plate (12) and extends to the upper part of the lower pressing plate (12).