An energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure

Abstract

The invention discloses an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure, which relates to the technical field of blow molding devices. Based on the blow molding principle, low-temperature gas is used as a cooling medium in this scheme, which is manifested in that the low-temperature gas directly acts on the outer wall of the product, and the gas blowing pressure is used to assist demoulding. On the basis of this technology, a multi-stroke component is added to further limit the flow direction of the low-temperature gas. During the low-temperature gas blowing process, it also has the function of recovering hot gas. Its purpose is that the overall process will not affect the blow molding process, and the cooling temperature difference of the mold itself is reduced, thereby reducing the power loss in the subsequent re-heating process of the mold, and the recovered hot gas is used simultaneously, and the recovered hot gas is used as the compressed gas "source" in the blow molding process, mainly utilizing the thermal energy in the hot gas.

Description

Technical Field

[0001] The invention relates to the technical field of blow molding devices, and in particular to an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure. Background Art

[0002] Plastic products are prepared based on the blow molding principle of the blow molding machine structure. The cooling process during the molding process is also one of the key factors affecting the quality of the finished product. Common cooling methods include mold cooling, external mold cooling, internal cooling, etc., mainly using low-temperature water as the cooling medium and utilizing the heat exchange principle, specifically designing a water system in the mold.

[0003] The out-of-mold cooling method is mainly used for blow molding of large products, and its cooling process is still based on the above-mentioned heat exchange principle for preliminary cooling and shaping before taking it out for natural cooling. It should be noted that the common cooling method is forced cooling of the mold cavity to meet the requirements of cooling and shaping, but in the next blow molding process, the mold cavity needs to be heated again. Due to the large "temperature difference" between the two blow molding processes, the power loss in the heating process is increased, and a large amount of low-temperature cooling water will also be consumed.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure. Regarding the cooling process in blow molding, the conventional method is to design a corresponding water system in the mold, use low-temperature cooling water as the cooling medium and utilize the heat exchange principle. In this method, the heat in the mold cavity will be directly "wasted", and the power loss will also increase during the reheating process.

[0006] The purpose of the present invention can be achieved through the following technical solutions: an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure, comprising a mother plate, a cavity plate and a gas component, wherein the cavity plate is mounted on the mother plate, and an air cylinder is mounted between the cavity plate and the mother plate, the setting position of the air cylinder corresponds to the molding cavity inside the cavity plate, and an air guide rod is arranged inside the air cylinder, permanent magnet blocks and blocking blocks are respectively installed at both ends of the air guide rod, and a multi-stroke assembly is arranged on the air guide rod, the multi-stroke assembly comprises a movable cone block, an air paddle, a front air wheel cover, and a rear air wheel cover, and an electromagnetic block corresponding to the permanent magnet block is installed inside the air cylinder;

[0007] The movable cone block, air paddle, front wheel cover and rear wheel cover are arranged in sequence along the direction from the permanent magnet block to the leveling block. The internal position of the air cylinder corresponding to the permanent magnet block and the movable cone block is set as a cold air cavity, and the position of the air cylinder corresponding to the front wheel cover and the rear wheel cover is set as a return air cavity, and the positions of the air cylinder corresponding to the return air cavity and the cold air cavity are respectively installed with return air pipes and cold air pipes, the return air pipes and cold air pipes match the gas assembly, the gas assembly injects low-temperature gas into the cold air cavity through the cold air pipe, and the gas assembly recovers the hot gas inside the return air cavity through the return air pipe.

[0008] It is further configured as follows: the movable cone block, the air paddle, the front air wheel cover, the rear air wheel cover and the air guide rod are slidably connected, and a blocking block is installed on the left side of the inner portion of the movable cone block corresponding to the air cylinder.

[0009] It is further configured as follows: the air paddles are linearly and equidistantly arranged along the length direction of the air guide rod, and the outer edge of the air paddles is slidably connected to the inner wall of the air buffer chamber, a connecting spring is arranged at the middle position of the air paddles at adjacent positions, and the middle position of the air paddles at adjacent positions inside the air cylinder is arranged as an air buffer chamber.

[0010] It is further configured as follows: a connecting air channel is opened in the internal position of the air guide rod corresponding to the air buffer chamber, the setting position of the connecting air channel corresponds to the setting position of the air paddle, and the air buffer chambers at adjacent positions are connected through the connecting air channel.

[0011] It is further configured as follows: fan blades are arranged inside the front air wheel cover and the rear air wheel cover, and the fan blades are arranged in a circular array along the center point of the air guide rod; the front air wheel cover and the rear air wheel cover are respectively provided with a first air port and a second air port along the length direction of the air guide rod, an air return port is provided at the outer edge position of the rear air wheel cover, and an airway port is provided on the air cylinder at a position corresponding to the air return cavity and the rear air wheel cover.

[0012] It is further configured as follows: the first air port, the second air port and the return air port are arranged in a circular array along the center point of the air guide rod, the return air port and the second air port are arranged alternately, and the setting position of the first air port corresponds to the setting position of the second air port.

[0013] The present invention has the following beneficial effects:

[0014] 1. The overall device is based on the blow molding principle. It is different from the conventional cooling method in that it uses low-temperature gas as the cooling medium. Without affecting the basic process of blow molding, the low-temperature gas directly acts on the outer wall of the product, and uses the blowing pressure of the low-temperature gas flow to simultaneously assist demoulding. The overall cooling will not directly act on the mold itself. Its purpose is to reduce the cooling temperature difference of the mold itself, so as to reduce the power loss in the re-heating process during the subsequent heating process;

[0015] 2. In combination with the above content, it is explained again that: during the low-temperature gas blowing-cooling process, it also has the function of recovering hot gas simultaneously. Specifically, through the rotation of the front wheel cover and the rear wheel cover in coordination with the gas flow, the hot gas is blown back into the rear wheel cover and enters the return air cavity without affecting the blowing of the low-temperature gas. The purpose is to use the recovered hot gas as the compressed gas "source" in blow molding, specifically to utilize the thermal energy in the hot gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic structural diagram of an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure proposed by the present invention;

[0018] Figure 2 This is a schematic structural diagram of a motherboard in an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure proposed by the present invention;

[0019] Figure 3 A cross-sectional view of a cavity plate in an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure proposed by the present invention;

[0020] Figure 4 A cross-sectional view of an air cylinder in an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure proposed by the present invention;

[0021] Figure 5 A cross-sectional view of an air cylinder in an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure proposed by the present invention;

[0022] Figure 6 The invention proposes an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure. Figure 4 Split diagram of ;

[0023] Figure 7 This is a cross-sectional view of a front wheel cover and a rear wheel cover in an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure proposed by the present invention.

[0024] In the figure: 1. motherboard; 2. cavity plate; 3. air cylinder; 4. electromagnetic block; 5. cold air cavity; 6. return air cavity; 7. blocking block; 8. rear air wheel cover; 9. front air wheel cover; 10. connecting spring; 11. air paddle; 12. movable cone block; 13. air guide rod; 14. permanent magnet block; 15. connecting air duct; 16. air buffer; 17. blocking block; 18. first air port; 19. return air port; 20. second air port; 21. air duct port. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1

[0027] For the cooling process in blow molding, the conventional method is to design a corresponding water system in the mold, use low-temperature cooling water as the cooling medium and utilize the heat exchange principle. In this way, the heat in the mold cavity will be directly "wasted", and the power loss will also increase during the reheating process. The following technical solutions are proposed:

[0028] Reference Figures 1 to 7 In this embodiment, an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure includes a motherboard 1, a cavity plate 2 and a gas component. The cavity plate 2 is mounted on the motherboard 1, and an air cylinder 3 is installed between the cavity plate 2 and the motherboard 1. The setting position of the air cylinder 3 corresponds to the molding cavity inside the cavity plate 2, and an air guide rod 13 is arranged inside the air cylinder 3. Permanent magnet blocks 14 and blocking blocks 7 are respectively installed at both ends of the air guide rod 13, and a multi-stroke component is arranged on the air guide rod 13. The multi-stroke component includes a movable cone block 12, an air paddle 11, a front air wheel cover 9, and a rear air wheel cover 8. An electromagnetic block 4 corresponding to the permanent magnet block 14 is installed inside the air cylinder 3;

[0029] The movable cone block 12, the air paddle 11, the front wheel cover 9, and the rear wheel cover 8 are arranged in sequence along the direction from the permanent magnet block 14 to the blocking block 7. The internal position of the air cylinder 3 corresponding to the permanent magnet block 14 and the movable cone block 12 is set as a cold air cavity 5, and the position of the air cylinder 3 corresponding to the front wheel cover 9 and the rear wheel cover 8 is set as a return air cavity 6, and the positions of the air cylinder 3 corresponding to the return air cavity 6 and the cold air cavity 5 are respectively installed with a return air pipe and a cold air pipe, the return air pipe and the cold air pipe match the gas component, the gas component injects low-temperature gas into the cold air cavity 5 through the cold air pipe, and the gas component recovers the hot gas inside the return air cavity 6 through the return air pipe, the movable cone block 12, the air paddle 11, the front wheel cover 9, the rear wheel cover 8 and the air guide rod 13 are slidably connected, and a blocking block 17 is installed on the left side position of the inner side of the air cylinder 3 corresponding to the movable cone block 12.

[0030] Working principle: The overall device is based on the mold structure in the blow molding machine. Figure 1 and Figure 2 For example, a molding cavity of a corresponding shape is arranged inside the cavity plate 2, and a plurality of air cylinders 3 are arranged according to the structural shape of the molding cavity, and the arrangement position of the air cylinder 3 corresponds to the molding cavity. It can be understood that the air cylinder 3 needs to be arranged one by one in accordance with the shape of the molding cavity, so that in this embodiment, the arrangement position and the number of the air cylinder 3 are not specifically limited, but it should be noted that the outer wall of the air cylinder 3 on one side close to the molding cavity and the blocking block 7 need to match the position of the inner wall of the molding cavity, and then when the electromagnetic block 4 is energized to generate magnetic force, a repulsive force is formed between the electromagnetic block 4 and the permanent magnet block 14, so that under the action of the repulsive force, the blocking block 7 completely blocks one end of the air cylinder 3, so that the inner wall of the molding cavity remains intact and does not affect the blow molding process;

[0031] When the electromagnetic block 4 generates suction in cooperation with the permanent magnet block 14, one end of the air cylinder 3 is "opened". During this process, the gas component blows the low-temperature gas into the cold air cavity 5, and blows it out from the air cylinder 3 along the direction of the movable cone block 12-air paddle 11-front air wheel cover 9-rear air wheel cover 8, and directly acts on the outer wall of the molded product, thereby cooling the blow-molded product. In this process, the low-temperature gas blowing pressure is also used to assist the demolding of the blow-molded product.

[0032] Embodiment 2

[0033] This embodiment uses the technical content in the first embodiment to explain and illustrate the low-temperature gas blowing process:

[0034] The air paddles 11 are linearly and equidistantly arranged along the length direction of the air guide rod 13, and the outer edge of the air paddles 11 is slidably connected to the inner wall of the air buffer chamber 16. A connecting spring 10 is arranged at the middle position of the air paddles 11 at adjacent positions. The middle position of the air paddles 11 at adjacent positions inside the air cylinder 3 is arranged as the air buffer chamber 16. A connecting air channel 15 is opened in the internal position of the air guide rod 13 corresponding to the air buffer chamber 16. The setting position of the connecting air channel 15 corresponds to the setting position of the air paddles 11, and the air buffer chambers 16 at adjacent positions are connected via the connecting air channel 15.

[0035] Solution Description: Refer to Figure 5 To explain, the low-temperature gas first enters the cold air cavity 5, and uses the gas pressure to push the movable cone block 12 to move to the right, so that the low-temperature gas enters the buffer chamber 16. In this process, the first air paddle 11 on the left directly bears the pressure of the low-temperature gas and moves to the right, and then the low-temperature gas enters the second buffer chamber 16 through the first connecting air duct 15 on the left. This process is continued, so that the low-temperature gas is blown out through the front wheel cover 9 and the rear wheel cover 8. Specifically, the movement of the air paddle 11 is combined with the elastic potential energy of the connecting spring 10 to reduce the pressure of the low-temperature gas during the blowing process, so as to avoid the low-temperature gas being blown to the outer wall of the product in a high-pressure state, which may cause quality problems such as dents on the outer wall of the blow-molded product.

[0036] Embodiment 3

[0037] This embodiment explains and illustrates the hot gas recovery process in Embodiment 1:

[0038] The front wheel cover 9 and the rear wheel cover 8 are provided with fan blades inside, and the fan blades are arranged in a circular array along the center point of the air guide rod 13. The front wheel cover 9 and the rear wheel cover 8 are respectively provided with a first air port 18 and a second air port 20 along the length direction of the air guide rod 13, and a return air port 19 is provided at the outer edge of the rear wheel cover 8. An airway port 21 is provided at a position of the air cylinder 3 corresponding to the return air cavity 6 and the rear wheel cover 8. The first air port 18, the second air port 20 and the return air port 19 are arranged in a circular array along the center point of the air guide rod 13, and the return air port 19 and the second air port 20 are staggered, and the setting position of the first air port 18 corresponds to the setting position of the second air port 20.

[0039] Solution Description: Refer again Figure 5 It is explained that: when the blocking block 7 moves to the left, it can be understood that: a gap is formed between the outer wall position of the blow-molded product and the blocking block 7, so that after the low-temperature gas enters the gap, according to the heat exchange principle, the low-temperature gas "accepts" the heat energy of the blow-molded product to form hot gas, thereby achieving the purpose of cooling. However, it should be noted that: the outer wall of the product is completely attached to the inner wall position of the molding cavity, so that the hot gas cannot be discharged from the molding cavity, which affects the injection process of the low-temperature gas;

[0040] In this embodiment, the front wheel cover 9 and the rear wheel cover 8 are mainly used. Figure 6 and Figure 7 The low temperature gas first enters the front wheel housing 9 through the first air port 18 in the horizontal direction. Figure 7 To explain: the front wheel cover 9 and the rear wheel cover 8 are both provided with blades, so that multiple independent areas are provided inside the two by the blades, and the two rotate by the low-temperature gas pressure. This part is the basic principle of this embodiment. It should also be explained that: if the number of independent areas is limited by limiting the layout angle of the blades in the front wheel cover 9 and the rear wheel cover 8, if the number of independent areas is n, then the number of the first air port 18 and the return air port 19 is n / 2, and the specific process includes the following contents:

[0041] S1: The low-temperature gas first enters the front wheel cover 9, and in conjunction with its rotation process, the low-temperature gas enters the rear wheel cover 8 through the second gas port 20 again, thereby acting on the gap between the blocking block 7 and the outer wall of the product to complete the cooling process;

[0042] S2: As shown in S1, because the number of second air ports 20 and return air ports 19 is staggered, the low-temperature gas will not actively overflow from the return air ports 19, so the number of second air ports 20 needs to be further limited. The number of second air ports 20 near the front wheel cover 9 is n / 2, but the number of second air ports 20 near the blocking block 7 is n, so that the low-temperature gas passes through the rear wheel cover 8 and the front wheel cover 9 from left to right. However, after the low-temperature gas receives heat energy to form hot gas, the hot gas re-enters the independent area in the rear wheel cover 8 through the second air port 20 at the right side of the rear wheel cover 8, and enters the return air chamber 6 through the return air port 19-airway port 21, so as to recover heat energy without affecting the cooling of the low-temperature gas.

[0043] S3: As shown in S2, the first air port 18 and the second air port 20 in the front wheel cover 9 and the rear wheel cover 8 are not in a "straight-through" state, but are in a "straight-through" state formed when the front wheel cover 9 and the rear wheel cover 8 rotate relative to each other. Similarly, the airway port 21 and the return air port 19 are also "straight-through" through the rotation process of the rear wheel cover 8. The purpose of this is to extend the cooling time of the product by the low-temperature gas;

[0044] In addition, the recovered hot gas is re-input into the gas component, specifically the thermal energy in the hot gas is utilized, because the compressed hot gas needs to be output during the blow molding process, so the recovered hot gas can be used as a compressed gas "source" in the blow molding process. When compressed gas needs to be output for blow molding, the recovered hot gas can be directly called and heated to a specified temperature, so that the recovered hot gas can be utilized again.

[0045] In summary: Based on the blow molding principle, this solution uses low-temperature gas as the cooling medium, which is manifested in that the low-temperature gas directly acts on the outer wall of the product, and the gas blowing pressure is used to assist in demolding. On the basis of this technology, a multi-stroke component is added to further limit the flow direction of the low-temperature gas. During the low-temperature gas blowing process, it also has the function of recovering hot gas. The purpose is that the overall process will not affect the blow molding process, and reduce the cooling temperature difference of the mold itself, thereby reducing the power loss in the subsequent reheating process of the mold, and simultaneously utilize the recovered hot gas, and use the recovered hot gas as the compressed gas "source" in the blow molding process, mainly utilizing the thermal energy in the hot gas.

[0046] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure, comprising a mother plate (1), a cavity plate (2) and a gas component, characterized in that: The cavity plate (2) is mounted on the mother plate (1), and an air cylinder (3) is mounted between the cavity plate (2) and the mother plate (1), the arrangement position of the air cylinder (3) corresponds to the molding cavity inside the cavity plate (2), and an air guide rod (13) is arranged inside the air cylinder (3), and permanent magnet blocks (14) and a blocking block (7) are respectively mounted at both ends of the air guide rod (13), and a multi-stroke assembly is arranged on the air guide rod (13), and the multi-stroke assembly comprises a movable cone block (12), an air paddle (11), a front air wheel cover (9), and a rear air wheel cover (8), and an electromagnetic block (4) corresponding to the permanent magnet block (14) is installed inside the air cylinder (3); The movable cone block (12), the air paddle (11), the front wheel cover (9), and the rear wheel cover (8) are arranged in sequence along the direction from the permanent magnet block (14) to the leveling block (7); the internal position of the air cylinder (3) corresponding to the permanent magnet block (14) and the movable cone block (12) is set as a cold air cavity (5); the position of the air cylinder (3) corresponding to the front wheel cover (9) and the rear wheel cover (8) is set as a return air cavity (6); and the positions of the air cylinder (3) corresponding to the return air cavity (6) and the cold air cavity (5) are respectively installed with a return air pipe and a cold air pipe; the return air pipe and the cold air pipe match the gas component; the gas component injects low-temperature gas into the cold air cavity (5) through the cold air pipe, and the gas component recovers hot gas inside the return air cavity (6) through the return air pipe; The front wheel cover (9) and the rear wheel cover (8) are provided with fan blades inside, and the fan blades are arranged in a circular array along the center point of the air guide rod (13). The front wheel cover (9) and the rear wheel cover (8) are respectively provided with a first air port (18) and a second air port (20) along the length direction of the air guide rod (13). The rear wheel cover (8) is provided with a return air port (19) at the outer edge position. The air cylinder (3) is provided with an airway port (21) at a position corresponding to the return air cavity (6) and the rear wheel cover (8). The first air port (18), the second air port (20) and the return air port (19) are arranged in a circular array along the center point of the air guide rod (13). The return air port (19) and the second air port (20) are arranged in a staggered manner. The setting position of the first air port (18) corresponds to the setting position of the second air port (20).

2. According to claim 1, an energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure is characterized in that: The movable cone block (12), the air paddle (11), the front air wheel cover (9), the rear air wheel cover (8) and the air guide rod (13) are slidably connected, and a blocking block (17) is installed at a left position inside the movable cone block (12) of the air cylinder (3).

3. The energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure according to claim 2 is characterized in that: The air paddles (11) are linearly and equidistantly arranged along the length direction of the air guide rod (13), and the outer edges of the air paddles (11) are slidably connected to the inner wall of the air buffer chamber (16). A connecting spring (10) is arranged at the middle position of the air paddles (11) at adjacent positions, and the middle position of the air paddles (11) at adjacent positions inside the air cylinder (3) is arranged as an air buffer chamber (16).

4. The energy-saving rapid cooling demoulding device for a blow molding machine based on a heat conversion structure according to claim 3 is characterized in that: A connecting air passage (15) is provided in an internal position of the air guide rod (13) corresponding to the air buffer chamber (16); the setting position of the connecting air passage (15) corresponds to the setting position of the air paddle (11); and the air buffer chambers (16) at adjacent positions are connected via the connecting air passage (15).

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