Bottle preform mold circulating cooling mechanism

Abstract

The utility model relates to the field of bottle preform mold cooling, in particular to a bottle preform mold circulating cooling mechanism which comprises a closed circulating system formed by a cooling box body and a connecting cover plate, a liquid outlet end at the lower end of the cooling box body is connected with a liquid inlet pipe through an upper pump body, and a liquid inlet end at the upper end of the connecting cover plate is connected with a liquid outlet pipe through a lower pump body. An inner cavity of the cooling box is divided into a cooling area and a liquid storage area through a front-and-rear-end rotatable partition plate, heat exchange pipes are arranged on the upper portion and the lower portion of the cooling area, temperature sensors are installed on the two side walls, and the partition plate is driven by a driving motor outside the cooling box to rotate. According to the mechanism, cooling liquid storage, heat exchange and circulation functions are integrated through integrated design, traditional split type layout is replaced, and the occupied area of equipment and the pipeline leakage risk are remarkably reduced; the device is characterized in that a volume-adjustable double-area structure is utilized, data are monitored in real time through a temperature sensor, and a driving motor drives a partition plate to dynamically adjust the volume ratio of a cooling area to a liquid storage area.

Description

Technical Field

[0001] This utility model relates to the field of preform mold cooling, specifically to a preform mold circulating cooling mechanism. Background Technology

[0002] The preform mold circulating cooling mechanism belongs to the field of plastic molding and processing equipment. It is mainly used to cool the mold during the preform production process to ensure the preform molding quality and production efficiency.

[0003] Traditional preform mold cooling systems often employ a split structure, separating the liquid storage tank from the heat exchange box. This layout not only results in a large overall footprint for the equipment but also requires numerous connecting pipes between the independent units to transfer the coolant, leading to a higher risk of coolant leakage. Furthermore, the volume of the internal partitioned areas in existing cooling systems is usually fixed, making it impossible to dynamically adjust the spatial ratio between the cooling zone and the liquid storage zone based on real-time temperature changes. This makes it difficult to maintain a stable coolant temperature gradient during continuous production, resulting in poor environmental adaptability and an inability to flexibly distribute the coolant between different areas. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a circulating cooling mechanism for preform molds, thereby solving the aforementioned technical problem that leads to an increase in the space required for the equipment.

[0005] The objective of this utility model is achieved through the following means:

[0006] A circulating cooling mechanism for a preform mold includes a cooling box and a connecting cover plate. The connecting cover plate is disposed on the upper surface of the cooling box. An upper pump body and a lower pump body are respectively connected to the liquid outlet end on the lower surface of the cooling box and the liquid inlet end on the upper surface of the connecting cover plate. An inlet pipe and an outlet pipe are respectively connected to the liquid inlet end of the upper pump body and the liquid outlet end of the lower pump body. A partition plate is rotatably connected to the front and rear ends of the inner cavity of the cooling box. The inner cavity of the cooling box is divided into a cooling zone and a storage zone by the partition plate. Heat exchange tubes are installed at the upper and lower parts of the inner cavity of the cooling zone. Temperature sensors are installed on both sides of the inner walls of the cooling zone and the storage zone. A drive motor is installed at the front and rear ends of the outer side of the cooling box, and the drive motor is coaxially connected to the partition plate. The coolant, after absorbing heat, enters the upper pump body through the inlet pipe. After being pressurized by the upper pump body, it is delivered to the cooling zone of the inner cavity of the cooling box. At this time, the heat exchange tubes at the upper part of the inner cavity of the cooling zone come into contact with the coolant, reducing the temperature through heat exchange. The cooled coolant then enters the lower part of the inner cavity of the cooling zone.

[0007] After completing one heat exchange, the coolant flows into the storage area through the gap between the partition plate and the inner wall of the cooling tank; the lower pump continuously outputs the coolant in the storage area to the external cooling system through the outlet pipe for secondary cooling, forming a closed loop circulation;

[0008] Temperature sensors installed on both sides of the inner wall of the cooling zone and the liquid storage zone monitor the liquid temperature in real time. When the liquid temperature in the cooling zone reaches the preset threshold, the drive motor drives the partition plate to rotate axially, allowing the coolant in the cooling zone to enter the liquid storage zone. At the same time, the use of temperature sensors and the rotation speed and direction of the partition plate driven by the two sets of drive motors can be controlled by the system and controller. This is existing technology, so it will not be described in detail here.

[0009] Furthermore, the heat exchange tubes are in two sets, with both the liquid outlet end and the liquid outlet end of the heat exchange tubes extending outward through the inner wall of the cooling box.

[0010] During operation, the two sets of heat exchange tubes participate in the coolant circulation process simultaneously. The coolant flows in from the inlet end of the heat exchange tube and is discharged to the external pipeline from the outlet end. The design of the outlet end and the inlet end penetrating the inner wall of the cooling box ensures that the coolant can be directly connected to the external equipment to form an independent circulation.

[0011] Furthermore, the heat exchange tube has an overall S-shaped design, and both the liquid outlet end and the liquid outlet end of the heat exchange tube are equipped with connecting flanges.

[0012] The S-shaped flow channel improves heat exchange efficiency by extending the coolant path, the folding structure enhances fluid turbulence and reduces the thickness of the laminar boundary layer, and the connecting flanges are connected to the external pipeline flanges at the liquid outlet and liquid inlet ends, respectively, and the sealing connection is achieved by bolt tightening.

[0013] Furthermore, the inner wall of the cooling box is rotatably connected to the front and rear ends of a rotating shaft, the surface of which is connected to a partition plate, and the drive motor is coaxially connected to the rotating shaft.

[0014] When the drive motor starts, it drives the rotating shaft to rotate, which in turn drives the partition plate to rotate within the cooling box. The rotation angle of the partition plate can adjust the flow cross-sectional area of ​​the cooling box cavity, controlling the flow speed and uniform distribution of the coolant between the storage area and the heat exchange area.

[0015] Furthermore, a liquid guide seat is installed at the bottom of the inner cavity of the liquid storage area. The upper surface of the liquid guide seat is designed to be high around the edges and low in the middle. The liquid inlet end of the liquid guide seat is connected to the liquid outlet end of the cooling box.

[0016] The coolant in the storage area converges towards the lowest point in the center along the upper surface of the liquid guide seat, and flows into the heat exchange tube through the liquid inlet end of the liquid guide seat. The inclined design of the liquid guide seat minimizes the amount of liquid residue, and during the discharge process, the liquid is accelerated to concentrate towards the liquid outlet end by gravity.

[0017] Furthermore, connecting plates and connecting frames are respectively installed on both sides of the cooling box and the connecting cover. The connecting plates and connecting frames are inserted and connected. External clamping plates are slidably connected to both the front and back of the connecting plates. A compression spring is connected between the inner wall of the connecting plate and the surface of the external clamping plate.

[0018] When the connecting cover plate is connected to the cooling box, the connecting plate is inserted into the slot of the connecting frame. The outer clamping plate is squeezed inward by the inner wall of the slot. After the connecting plate is fully inserted, the outer clamping plate pops out under the action of the compression spring and forms a snap-fit ​​with the outer edge of the connecting frame.

[0019] The beneficial effects of the circulating cooling mechanism for preform molds of this utility model are: the closed circulation system formed by the cooling box and the connecting cover plate integrates the functions of coolant storage, heat exchange and circulation into a single device, effectively replacing the traditional combination layout of separate storage tanks and heat exchange boxes. This integrated structure not only significantly reduces the overall footprint of the equipment, but also reduces the risk of coolant leakage by eliminating the connecting pipes between independent devices.

[0020] The dual-zone separation structure inside the cooling tank enables dynamic volume adjustment of the cooling zone and the liquid storage zone through a rotatable partition plate. Driven by the motor, the partition plate can automatically adjust the ratio between the two zones based on real-time temperature monitoring data: when the temperature sensor detects an increase in the liquid temperature in the cooling zone, the system can expand the volume of the cooling zone to enhance the contact area between the heat exchange tubes and the coolant; conversely, it can increase the capacity of the liquid storage zone to store low-temperature coolant, effectively improving the environmental adaptability of the cooling system, especially maintaining a more stable coolant temperature gradient during continuous production. At the same time, when the partition plate rotates to a certain angle, the coolant in the cooling zone enters the liquid storage zone. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a circulating cooling mechanism for a preform mold according to the present invention.

[0022] Figure 2 This is a schematic cross-sectional view of the cooling box and connecting cover plate of a circulating cooling mechanism for a preform mold according to this utility model.

[0023] Figure 3 This is a cross-sectional view of the connection between the connecting plate and the connecting frame of a circulating cooling mechanism for a preform mold according to this utility model.

[0024] Figure 4 This is a schematic diagram of the right side view of the heat exchange tube of the circulating cooling mechanism for a preform mold according to this utility model.

[0025] Figure 5 This is a schematic diagram of the partition plate and its connection structure of a circulating cooling mechanism for a preform mold according to this utility model;

[0026] Figure 6 This is a schematic diagram of the liquid guide seat and its connection structure of a circulating cooling mechanism for a preform mold according to this utility model.

[0027] In the diagram, 1. Cooling box; 2. Connecting cover plate; 3. Upper pump body; 4. Inlet pipe; 5. Lower pump body; 6. Outlet pipe; 7. Divider plate; 8. Cooling zone; 9. Storage zone; 10. Heat exchange tube; 11. Connecting flange; 12. Rotary shaft; 13. Drive motor; 14. Liquid guide seat; 15. Connecting plate; 16. Connecting frame; 17. Outer clamping plate; 18. Compression spring; 19. Temperature sensor. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] In this embodiment, refer to Figures 1 to 6 The specific implementation of the preform mold circulating cooling mechanism includes a cooling box 1 and a connecting cover plate 2. The connecting cover plate 2 is disposed on the upper surface of the cooling box 1. The liquid outlet end of the lower surface of the cooling box 1 and the liquid inlet end of the upper surface of the connecting cover plate 2 are respectively connected to an upper pump body 3 and a lower pump body 5. The liquid inlet end of the upper pump body 3 and the liquid outlet end of the lower pump body 5 are respectively connected to an inlet pipe 4 and an outlet pipe 6. The front and rear ends of the inner cavity of the cooling box 1 are rotatably connected to a partition plate 7. The inner cavity of the cooling box 1 is divided into a cooling zone 8 and a liquid storage zone 9 by the partition plate 7. Heat exchange pipes 10 are installed in the upper and lower parts of the inner cavity of the cooling zone 8. Temperature sensors 19 are installed on both sides of the inner wall of the cooling zone 8 and the liquid storage zone 9. A drive motor 13 is installed in the front and rear ends of the outer side of the cooling box 1. The drive motor 13 is coaxially connected to the partition plate 7. After absorbing heat, the coolant enters the upper pump body 3 through the inlet pipe 4. After being pressurized by the upper pump body 3, it is delivered to the cooling zone 8 inside the cooling box 1. At this time, the heat exchange pipe 10 in the upper part of the inner cavity of the cooling zone 8 comes into contact with the coolant and reduces the temperature through heat exchange. The cooled coolant then enters the lower part of the inner cavity of the cooling zone 8.

[0030] The coolant that has completed one heat exchange flows into the storage area 9 through the gap between the partition plate 7 and the inner wall of the cooling box 1; the lower pump body 5 continuously outputs the coolant in the storage area 9 to the external cooling system through the outlet pipe 6 for secondary cooling, forming a closed loop;

[0031] Temperature sensors 19, installed on both sides of the inner wall of the cooling zone 8 and the liquid storage zone 9, monitor the liquid temperature in real time. When the liquid temperature in the cooling zone 8 reaches a preset threshold, the drive motor 13 drives the partition plate 7 to rotate axially, allowing the coolant in the cooling zone 8 to enter the liquid storage zone 9. At the same time, the use of temperature sensors 19 and the rotation speed and direction of the two sets of drive motors 13 driving the partition plate 7 can be controlled by the system and controller. This is existing technology, so it will not be described in detail here. It effectively replaces the traditional combination layout of split liquid storage tank and heat exchange box.

[0032] like Figure 4As shown, there are two sets of heat exchange tubes 10. Both the liquid outlet and liquid outlet ends of the heat exchange tubes 10 extend outwards through the inner wall of the cooling box 1. During operation, both sets of heat exchange tubes 10 participate in the coolant circulation process simultaneously. The coolant flows in from the liquid inlet end of the heat exchange tube 10 and is discharged to the external pipeline from the liquid outlet end. The design of the liquid outlet and liquid inlet ends penetrating the inner wall of the cooling box 1 ensures that the coolant can be directly connected to external equipment, forming an independent circulation loop. By setting two sets of heat exchange tubes 10, the coolant can be distributed, avoiding uneven heat exchange caused by excessive flow in a single pipeline. The heat exchange tubes 10 have an overall S-shaped design, and both the liquid outlet and liquid outlet ends of the heat exchange tubes 10 are equipped with connecting flanges 11. The S-shaped flow channel improves heat exchange efficiency by extending the coolant path, and the folding structure enhances fluid turbulence and reduces the thickness of the laminar boundary layer. The connecting flange 11 connects to the external pipeline flange at both the outlet and inlet ends, and the sealing connection is achieved by bolt tightening. The standardized interface design of the connecting flange 11 facilitates quick disassembly and maintenance, while ensuring the sealing reliability of the pipeline connection.

[0033] like Figure 5 As shown, a rotating shaft 12 is rotatably connected to the front and rear ends of the inner wall of the cooling box 1. The surface of the rotating shaft 12 is connected to the partition plate 7, and the drive motor 13 is coaxially connected to the rotating shaft 12. When the drive motor 13 starts, it drives the rotating shaft 12 to rotate, and the rotating shaft 12 synchronously drives the partition plate 7 to rotate inside the cooling box 1. The rotation angle of the partition plate 7 can adjust the flow cross-sectional area of ​​the inner cavity of the cooling box 1, control the flow speed and uniform distribution of the coolant between the storage area 9 and the heat exchange area, and achieve dynamic adjustment of the coolant flow state through the linkage design of the rotating shaft 12 and the partition plate 7.

[0034] like Figure 6 As shown, a liquid guide seat 14 is installed at the bottom of the inner cavity of the liquid storage area 9. The upper surface of the liquid guide seat 14 is designed to be high around the edges and low in the middle. The liquid inlet end of the liquid guide seat 14 is connected to the liquid outlet end of the cooling box 1. The coolant in the liquid storage area 9 converges towards the low center point along the upper surface of the liquid guide seat 14 and flows into the heat exchange tube 10 through the liquid inlet end of the liquid guide seat 14. The inclined design of the liquid guide seat 14 minimizes the amount of liquid residue. During the discharge process, gravity accelerates the concentration of liquid towards the outlet end. The high-around-the-edges and low-in-the-middle structure of the liquid guide seat 14 effectively prevents liquid accumulation at the bottom of the liquid storage area 9, ensuring complete discharge of coolant. The inclined flow guiding design reduces liquid residue, lowers the risk of medium corrosion, and improves the liquid inlet response speed of the heat exchange tube 10.

[0035] like Figure 2 and Figure 3As shown, connecting plates 15 and connecting frames 16 are respectively installed on both sides of the cooling box 1 and the connecting cover plate 2. The connecting plates 15 and the connecting frames 16 are inserted into each other. External clamping plates 17 are slidably connected to both the front and back of the connecting plates 15. A compression spring 18 is connected between the inner wall of the connecting plates 15 and the surface of the external clamping plates 17. When the connecting cover plate 2 is connected to the cooling box 1, the connecting plates 15 are inserted into the slots of the connecting frames 16. The external clamping plates 17 are compressed inward by the inner wall of the slot. After the connecting plates 15 are fully inserted, the external clamping plates 17 pop out under the action of the compression spring 18 and form a snap-fit ​​with the outer edge of the connecting frames 16. The plug-in structure of the connecting plates 15 and the connecting frames 16 enables the rapid assembly of the cooling box 1 and the cover plate. The combination design of the external clamping plates 17 and the compression spring 18 provides bidirectional mechanical locking to prevent the connection from loosening due to equipment vibration and to simplify the subsequent disassembly and maintenance process.

[0036] The usage process of the preform mold circulating cooling mechanism in this embodiment is as follows:

[0037] In existing bottle preform molds, heat dissipation pipes are provided. Coolant flows in the heat dissipation pipes to absorb heat, thereby achieving the heat dissipation effect. After absorbing heat, the coolant enters the upper pump body 3 of this mechanism through the inlet pipe 4. The upper pump body 3 pressurizes the coolant and delivers it to the cooling zone 8 inside the cooling box 1. The lower pump body 5 continuously outputs the coolant in the storage zone 9 through the outlet pipe 6 to the bottle preform mold for cooling, forming a closed loop circulation.

[0038] After the coolant enters the cooling zone 8, it comes into contact with two sets of heat exchange tubes 10 installed at the upper and lower parts of the inner cavity. The heat exchange tubes 10 extend the coolant path through the S-shaped flow channel design, enhance the fluid turbulence, and improve the heat exchange efficiency. After the coolant exchanges heat through the heat exchange tubes 10, its temperature decreases and it flows into the lower part of the inner cavity of the cooling zone 8.

[0039] After completing one heat exchange, the coolant flows into the storage area 9 after the partition plate 7 rotates. The liquid guide seat 14 at the bottom of the inner cavity of the storage area 9 guides the coolant to the center low point through the design of the slope that is high around the perimeter and low in the middle. The liquid guide seat 14 guides the coolant into the inlet end of the heat exchange tube 10 to ensure that the liquid is completely discharged and to reduce residue.

[0040] Temperature sensors 19 on both sides of the inner wall of cooling zone 8 and liquid storage zone 9 monitor the liquid temperature in real time. When the liquid temperature in cooling zone 8 reaches the preset threshold, drive motor 13 starts and drives shaft 12 to rotate. Shaft 12 drives partition plate 7 to rotate axially, adjusting the flow cross-sectional area of ​​cooling zone 8 and liquid storage zone 9, and controlling the flow speed and distribution uniformity of coolant.

[0041] When the cooling box 1 is connected to the connecting cover plate 2, the connecting plate 15 is inserted into the slot of the connecting frame 16, and the outer clamping plate 17 is squeezed inward by the inner wall of the slot. After the connecting plate 15 is fully inserted, it pops out under the action of the compression spring 18 and is clamped and fixed to the outer edge of the connecting frame 16.

[0042] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circulating cooling mechanism for a preform mold, comprising a cooling box (1) and a connecting cover plate (2), wherein the connecting cover plate (2) is disposed on the upper surface of the cooling box (1), the liquid outlet end of the lower surface of the cooling box (1) and the liquid inlet end of the upper surface of the connecting cover plate (2) are respectively connected to an upper pump body (3) and a lower pump body (5), and the liquid inlet end of the upper pump body (3) and the liquid outlet end of the lower pump body (5) are respectively connected to an inlet pipe (4) and an outlet pipe (6), characterized in that: The cooling box (1) has a partition plate (7) rotatably connected to the front and rear ends of the inner cavity. The inner cavity of the cooling box (1) is divided into a cooling zone (8) and a liquid storage zone (9) by the partition plate (7). Heat exchange tubes (10) are installed on the upper and lower parts of the inner cavity of the cooling zone (8). Temperature sensors (19) are installed on both sides of the inner wall of the cooling zone (8) and the liquid storage zone (9). A drive motor (13) is installed on the front and rear ends of the outer side of the cooling box (1). The drive motor (13) is coaxially connected to the partition plate (7).

2. The circulating cooling mechanism for a preform mold according to claim 1, characterized in that: The number of heat exchange tubes (10) is two sets, and the liquid outlet end of the heat exchange tube (10) extends outward through the inner wall of the cooling box (1).

3. The preform mold circulating cooling mechanism according to claim 2, characterized in that: The heat exchange tube (10) is designed in an S-shape, and both the liquid outlet end and the liquid outlet end of the heat exchange tube (10) are equipped with connecting flanges (11).

4. The circulating cooling mechanism for a preform mold according to claim 1, characterized in that: The inner wall of the cooling box (1) is rotatably connected to the front and rear ends of the rotating shaft (12). The surface of the rotating shaft (12) is connected to the partition plate (7). The drive motor (13) is coaxially connected to the rotating shaft (12).

5. The circulating cooling mechanism for a preform mold according to claim 1, characterized in that: The bottom of the inner cavity of the liquid storage area (9) is equipped with a liquid guide seat (14). The upper surface of the liquid guide seat (14) is designed to be high around the edges and low in the middle. The liquid inlet of the liquid guide seat (14) is connected to the liquid outlet of the cooling box (1).

6. The preform mold circulating cooling mechanism according to claim 1, characterized in that: The cooling box (1) and the connecting cover (2) are respectively equipped with a connecting plate (15) and a connecting frame (16). The connecting plate (15) and the connecting frame (16) are inserted and connected. The front and back sides of the connecting plate (15) are slidably connected with an outer clamping plate (17). A compression spring (18) is connected between the inner wall of the connecting plate (15) and the surface of the outer clamping plate (17).

Images