Cooling device for blow molding

Abstract

The utility model discloses a cooling device for blow molding, which relates to the technical field of blow molding equipment and comprises two die holders, the two die holders are symmetrically arranged, and die cavities are arranged on the inner sides of the die holders. According to the utility model, the mold cavity is arranged on the inner side of the mold base, the movable pipe is arranged at the bottom end of the mold cavity, the air guide cavity is arranged in the movable pipe, and the air guide cavity can inject compressed air into the mold cavity through the extension cavity at the top end of the air guide cavity so as to realize blow molding of a product; after a product is subjected to blow molding, the air pressure in the mold cavity rises, the movable ring moves downwards under the action of the air pressure, at the moment, air in the mold cavity is exhausted through the exhaust hood and the exhaust pipe, circulation of the air in the mold cavity can be achieved, and the air can take out heat of the product in the circulation process so as to achieve cooling of the product; and the cooling effect of the product is ensured while the production efficiency of the product is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding equipment, and particularly relates to a cooling device for blow molding. Background Art

[0002] At present, most of the plastic bucket production industries adopt the die blow molding process. In the actual production operation process, the formed plastic bucket has a relatively high temperature and needs to be initially cooled in the mold. After the initial cooling, it is taken out and then naturally cooled. Such a cooling method takes too long, resulting in a reduction in production efficiency. Moreover, due to insufficient and uneven cooling after the blow molded bucket is formed, it is easy to cause deformation of the blow molded product, and then the number of scrapped products increases, resulting in waste of materials. Therefore, a device is needed to solve the problems of low existing cooling efficiency and high material waste rate.

[0003] For example, a special cooling device for blow molded plastic buckets with the publication number of CN209633736U includes a cooling rack, an air cooling plate, a fixing mechanism, a water cooling plate and a bottom box; the cooling rack is arranged on the upper part of the bottom box, the water cooling plate is arranged at the inner bottom of the cooling rack, the fixing mechanism is arranged on both sides of the upper part of the water cooling plate in the cooling rack, and the air cooling plate is arranged on the upper part of the fixing mechanism in the cooling rack; the cooling rack is composed of columns and a top plate. The columns are vertically arranged at the four corners of the upper surface of the bottom box, and the top plate is horizontally arranged on the upper part of the columns. The top plate is a cuboid plate, and threaded holes matching the upper ends of the columns are arranged at the four corners of the top plate. An air cylinder A and a guide post A are vertically arranged downward on the upper part of the top plate. By the combined use of the cooling rack, the air cooling plate, the fixing mechanism and the water cooling plate, the cooling efficiency of the blow molded plastic bucket is improved, and the problem of high material waste rate is reduced.

[0004] The above technical solution has some problems in practical applications. This technical solution cools the product through the combination of air cooling and water cooling. However, the product needs to be completely cooled after demoulding, which has a certain impact on the blow molding production efficiency of the product.

[0005] Therefore, it is very necessary to invent a cooling device for blow molding to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a cooling device for blow molding to solve the problems put forward in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A cooling device for blow molding, including a mold base. There are two mold bases, and the two mold bases are symmetrically arranged. A mold cavity is opened inside the mold base. A through groove penetrates through the bottom end of the mold cavity. An extension groove is provided at the top end of the through groove. A movable pipe penetrates through the inside of the through groove. An extension seat is fixedly provided at the top end of the movable pipe, and the extension seat is arranged inside the extension groove. An air guide cavity is opened inside the movable pipe. An extension cavity is provided at the top end of the air guide cavity, and the extension cavity is arranged inside the extension seat. A plurality of air outlet holes are circumferentially arranged on the outer side wall of the extension cavity. An air inlet nozzle penetrates through the bottom end of the outer side wall of the air guide cavity. A slot is opened in the middle of the upper surface of the extension seat. An exhaust pipe penetrates through the inside of the slot. An exhaust hood is fixedly provided at the top end of the exhaust pipe, and a plurality of exhaust holes are circumferentially arranged on the outer side wall of the exhaust hood. A movable ring with a ring structure is sleeved on the outer side wall of the exhaust hood.

[0008] Preferably, the movable ring is arranged at the top end inside the slot, and a spring is arranged between the bottom end of the movable ring and the bottom of the slot.

[0009] Preferably, a conduit is fixedly provided at the bottom end of the mold base. A cooling cavity is opened inside the mold base. Both ends of the conduit are fixedly connected to both ends of the cooling cavity.

[0010] Preferably, the cooling cavity is arranged in a serpentine structure, and the position of the cooling cavity corresponds to that of the mold cavity.

[0011] Preferably, a heat dissipation pipe is fixedly provided on the outer side wall of the mold base, and the heat dissipation pipe is arranged in a serpentine structure.

[0012] Preferably, a circulation pump is fixedly provided between the heat dissipation pipe and the conduit. A plurality of heat dissipation fins are fixedly provided in the middle of the heat dissipation pipe. All the plurality of heat dissipation fins are arranged in an inclined structure, and the plurality of heat dissipation fins are arranged at equal intervals.

[0013] The technical effects and advantages of the present utility model:

[0014] 1. In the present utility model, by arranging a mold cavity inside the mold base, a movable pipe is arranged at the bottom end of the mold cavity, and an air guide cavity is arranged inside the movable pipe. The air guide cavity can inject compressed gas into the mold cavity through the extension cavity at its top end to realize the blow molding of the product. By arranging an exhaust hood at the top end of the movable pipe and a movable ring outside the exhaust hood, after the product is blow molded, the air pressure inside the mold cavity rises, and the movable ring moves downward under the action of the air pressure. At this time, the air inside the mold cavity is discharged through the exhaust hood and the exhaust pipe. At this time, the air circulation inside the mold cavity can be realized, and the heat of the product can be taken out during the air circulation process to realize the cooling and temperature reduction of the product, ensuring the cooling effect of the product while not affecting the production efficiency of the product;

[0015] 2. The utility model is provided with a cooling cavity inside the die base, and a conduit is arranged at the bottom end of the cooling cavity. One end of the conduit is connected to a radiating pipe through a circulating pump. During the blow molding process of the product, the circulating pump can drive the refrigerant in the cooling cavity and the radiating pipe to move, so as to realize the heat dissipation and cooling of the die cavity, thereby achieving the effect of auxiliary cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is an exploded view of the overall structure of the utility model.

[0018] Figure 3 It is a schematic sectional view of the overall structure of the utility model.

[0019] Figure 4 It is of the utility model Figure 3 Schematic enlarged view of the structure at A.

[0020] Figure 5 It is a schematic diagram of the cooling cavity structure of the utility model.

[0021] In the figure: 1. Die base; 2. Die cavity; 3. Through groove; 4. Extension groove; 5. Movable pipe; 6. Extension seat; 7. Air guide cavity; 8. Extension cavity; 9. Air inlet nozzle; 10. Slot; 11. Exhaust pipe; 12. Exhaust hood; 13. Movable ring; 14. Conduit; 15. Cooling cavity; 16. Radiating pipe; 17. Circulating pump; 18. Radiating fins. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] The present utility model provides as Figures 1-5A cooling device for blow molding shown in the figure includes a mold base 1. There are two mold bases 1, and the two mold bases 1 are symmetrically arranged. A mold cavity 2 is formed inside the mold base 1. A through groove 3 penetrates through the bottom end of the mold cavity 2. An extension groove 4 is arranged at the top end of the through groove 3. A movable tube 5 penetrates through the inside of the through groove 3. An extension seat 6 is fixedly arranged at the top end of the movable tube 5, and the extension seat 6 is arranged inside the extension groove 4. An air guide cavity 7 is formed inside the movable tube 5. An extension cavity 8 is arranged at the top end of the air guide cavity 7, and the extension cavity 8 is arranged inside the extension seat 6. A plurality of air outlet holes are arranged around the outer side wall of the extension cavity 8. An air inlet nozzle 9 penetrates through the bottom end of the outer side wall of the air guide cavity 7. The air inlet nozzle 9 is used to inject compressed gas to realize the blow molding of products;

[0024] Specifically, a slot 10 is formed in the middle of the upper surface of the extension seat 6. An exhaust pipe 11 penetrates through the inside of the slot 10. An exhaust hood 12 is fixedly arranged at the top end of the exhaust pipe 11. A plurality of exhaust holes are arranged around the outer side wall of the exhaust hood 12. An annular movable ring 13 is sleeved on the outer side wall of the exhaust hood 12. The movable ring 13 is arranged at the top end inside the slot 10. A spring is arranged between the bottom end of the movable ring 13 and the bottom of the slot 10. The spring can apply a force to the movable ring 13 to ensure that the exhaust holes on the outer side of the exhaust hood 12 are blocked during the blow molding process of the product;

[0025] More specifically, a conduit 14 is fixedly arranged at the bottom end of the mold base 1. A cooling cavity 15 is formed inside the mold base 1. Both ends of the conduit 14 are fixedly connected to both ends of the cooling cavity 15. The cooling cavity 15 is arranged in a serpentine structure, and the position of the cooling cavity 15 corresponds to that of the mold cavity 2. A heat dissipation pipe 16 is fixedly arranged on the outer side wall of the mold base 1, and the heat dissipation pipe 16 is arranged in a serpentine structure. A circulation pump 17 is fixedly arranged between the heat dissipation pipe 16 and the conduit 14. The circulation pump 17 can drive the circulation of the refrigerant in the cooling cavity 15 and the heat dissipation pipe 16 to realize the auxiliary cooling of the mold base 1;

[0026] Moreover, a plurality of heat dissipation fins 18 are fixedly arranged in the middle of the heat dissipation pipe 16. All the plurality of heat dissipation fins 18 are arranged in an inclined structure, and the plurality of heat dissipation fins 18 are arranged at equal intervals. The arrangement of the heat dissipation fins 18 can realize the heat dissipation and cooling of the refrigerant inside the heat dissipation pipe 16 to ensure the cooling effect of the product.

[0027] The working principle of the present utility model:

[0028] When this device is in use, two mold bases 1 are combined to form a product mold. The melted product raw material is injected into the mold cavity 2 through the feeding port at the top of the mold base 1. At this time, the movable tube 5 is pushed upward, so that the movable tube 5 drives the extension seat 6 to move upward. At this time, compressed gas is injected into the air guide cavity 7 through the air inlet nozzle 9, and then the compressed gas is injected into the mold cavity 2 through the extension cavity 8 and the air outlet holes. At this time, the raw material in the mold cavity 2 is blow-molded under the action of the compressed gas and fits against the inner wall of the mold cavity 2. After the product is completely formed, with the continuous injection of the compressed gas, the air pressure inside the mold cavity 2 rises. At this time, the spring force below the movable ring 13 is less than the air pressure acting force, so that the movable ring 13 moves downward. At this time, the movable ring 13 is misaligned with the exhaust hood 12. At this time, the air in the mold cavity 2 enters the exhaust hood 12 through the exhaust holes outside the exhaust hood 12, and then is discharged through the exhaust pipe 11. During this process, the compressed air takes out the heat of the product to achieve the cooling treatment of the product.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cooling device for blow molding, comprising a mold base (1), characterized in that: Two mold bases (1) are provided, and the two mold bases (1) are symmetrically arranged. A mold cavity (2) is provided on the inner side of the mold base (1). A through groove (3) is provided at the bottom end of the mold cavity (2). An extension groove (4) is provided at the top end of the through groove (3). A movable tube (5) is provided inside the through groove (3). An extension seat (6) is fixedly provided at the top end of the movable tube (5). The extension seat (6) is arranged inside the extension groove (4). An air guide cavity (7) is provided inside the movable tube (5). An extension cavity (8) is provided at the top end of the air guide cavity (7). The extension chamber (8) is arranged inside the extension seat (6), and the outer wall of the extension chamber (8) is surrounded by a plurality of air outlet holes. The bottom end of the outer wall of the air guide chamber (7) is penetrated by an air inlet nozzle (9). A slot (10) is opened in the middle of the upper surface of the extension seat (6), and an exhaust pipe (11) is penetrated inside the slot (10). An exhaust hood (12) is fixedly arranged at the top of the exhaust pipe (11), and the outer wall of the exhaust hood (12) is surrounded by a plurality of exhaust holes. The outer wall of the exhaust hood (12) is sleeved with a movable ring (13) of an annular structure.

2. A cooling device for blow molding according to claim 1, characterized in that: The movable ring (13) is arranged at the inner top end of the slot (10), and a spring is arranged between the bottom end of the movable ring (13) and the bottom of the slot (10).

3. A blow molding cooling device according to claim 2, characterized in that: A conduit (14) is fixedly provided at the bottom end of the mold base (1), a cooling cavity (15) is provided inside the mold base (1), and two ends of the conduit (14) are fixedly connected to two ends of the cooling cavity (15).

4. A cooling device for blow molding according to claim 3, characterized in that: The cooling cavity (15) is configured as a serpentine structure, and the position of the cooling cavity (15) corresponds to the mold cavity (2).

5. A cooling device for blow molding according to claim 4, characterized in that: A heat dissipation pipe (16) is fixedly arranged on the outer side wall of the mold base (1), and the heat dissipation pipe (16) is arranged in a serpentine structure.

6. A cooling device for blow molding according to claim 5, characterized in that: A circulation pump (17) is fixedly arranged between the heat dissipation pipe (16) and the conduit (14); a plurality of heat dissipation fins (18) are fixedly arranged in the middle of the heat dissipation pipe (16); the plurality of heat dissipation fins (18) are all arranged in an inclined structure, and the plurality of heat dissipation fins (18) are arranged at equal intervals.

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