A continuous cooling blister mold

Abstract

The present invention provides a continuously cooled plastic blister mold, which is designed and installed in a cooling device inside a mold barrel similar to a cylindrical shape, connected to the outside through a special structure, and a cooling medium is introduced from the special structure. After forming on the mold barrel, a rapid heat exchange is performed, and then the heat is taken away through the plastic blister pipe, thereby achieving the effect of cooling the mold barrel and stabilizing the surface temperature of the mold. With the production process of this continuous cooling mold, the sheet can be directly plasticized and cooled after being extruded from the extrusion mold, shortening the intermediate turnover of the sheet and the large investment in the back-end process equipment, which is of great help in reducing costs and production difficulty.

Description

Technical Field

[0001] The invention relates to a mold cooling system in the production process of thermoplastic continuous blister products, in particular to a continuously cooled blister mold. Background Art

[0002] In the production process of blister products, the production process is to place the hot melt into a semi-fluid sheet on the mold, and then form the product by negative pressure. During the blister process, a large amount of heat will be taken away, and then cooled on the mold surface, and then fixed, and the shape on the mold will be copied on the sheet. At this time, a large amount of heat will be transferred to the mold, causing the mold temperature to rise, so that the shape cannot be completely copied, and the demoulding will cause the shape to deform, affecting product quality and efficiency.

[0003] Patent application No.: 201410015663.0 discloses a blister device and a blister method which are widely used in the current blister process. The blister device is provided with a flip bracket on one side of a forming device for assembling a plate and rotating the plate onto the forming device by flipping; the blister device clamps the plate by the flip bracket and heats the inner surface of the plate, after heating, drives the flip bracket to transfer the plate to the forming device, and starts the forming device for blister forming; the device changes the way the original blister device heats the outer surface of the plate, avoids the situation where the surface of the plate product becomes shiny, and improves the visual effect of the outer surface of the plate; the blister method of the present invention comprises the following steps: 1) clamping the inner surface of the plate on the flip bracket upward; 2) heating the inner surface of the plate; 3) after heating, driving the flip bracket and transferring the plate to the forming device; 4) starting the forming device for blister forming.

[0004] However, the sheet material used in this method is supplied separately outside the production line. The sheet material needs to be heated twice, and then the tooling is used for handling, heating, shaping, and cooling. The cooling medium is passed through the cooling part. Due to the large number of action steps, the time cycle from loading to finished product output of a sheet material is long, the production speed is slow, and it is difficult to increase production capacity. At the same time, the realization of multiple actions requires more equipment investment, the structure is relatively complex, and the cost investment is relatively high. The blister molding station can only perform molding at a single station, and cannot carry out uninterrupted continuous production. Summary of the invention

[0005] The purpose of the present invention is to solve the defects of the prior art and provide a continuous cooling plastic blister mold, which realizes continuous cooling, has high cooling efficiency, is easy to install and operate, can reduce costs, and improve production capacity. It can also be adapted to cool a variety of materials with different widths, complex materials, and different cooling temperatures. It has good cooling effect and high product quality.

[0006] To achieve the above purpose, the present invention provides a continuously cooled plastic suction mold, comprising a mold barrel, a seat bearing supporting the mold rotation and a rotary joint fixing the end of the mold, characterized in that: it also has a sleeve passing through the center of the mold barrel, and a plurality of cooling groups installed on the sleeve; the sleeves are fixed by locking sleeves at both ends of the mold barrel, and the concentricity of the sleeves and the mold barrel is ensured, and the sleeves are fixed and tightened by tightening nuts to ensure that the sleeves do not sag; multiple conduits are installed in the sleeves, one end of the conduits is respectively connected to the connecting pieces, and the other end is respectively connected to the corresponding refrigerant interfaces outside the mold barrel; the connecting pieces are connected to the cooling groups;

[0007] The cooling group is constructed as follows: having nozzles; the nozzles are arranged in an arc shape to spray a larger surface area;

[0008] Select the appropriate nozzle aperture according to the flow rate required for cooling; adjust the appropriate distance from the nozzle to the mold barrel and the nozzle injection angle according to the required cooling rate.

[0009] The nozzle spray angle is 40°~100°;

[0010] The aperture of the nozzle is K = 0.8-2.2mm, and the distance from the nozzle to the die barrel is H = 45-155cm.

[0011] Flow meters and valves are installed on the refrigerant access pipelines to control the refrigerant flow of the corresponding cooling groups. The mold is also equipped with vacuum pipeline exhaust ports, which are connected to the external vacuum fans. Valves are installed on the pipelines to control the amount of air drawn by the valve opening.

[0012] The air volume and the refrigerant volume cooperate with each other to achieve the effect of constant mold temperature.

[0013] In addition, gears or sprockets are installed at both ends of the mold shaft head and near the seat bearing to input external rotational power to drive the mold cylinder to rotate and complete the blistering;

[0014] Furthermore, an openable sealing plate is installed on the sleeve to facilitate installation operation and inspection and maintenance when the conduit is connected to the cooling group. After the work is completed, the sealing plate is closed;

[0015] The cooling groups can be designed into 1 group, 2 groups, 3 groups, 4 groups or more according to actual needs.

[0016] Temperature sensors are also installed in each area of ​​the mold barrel corresponding to the cooling group to sense the cooling temperature of each area of ​​the mold;

[0017] The valves are all solenoid valves, and corresponding electronic management systems are designed to implement automatic control.

[0018] The electronic management system also includes intelligent terminals, management systems, and central processing units. Users input the temperatures required for cooling in various areas of the mold barrel through the intelligent terminals, and the temperature sensors feed back the temperatures of various areas to the central processing unit in real time. After calculation, the central processing unit controls the solenoid valves of the refrigerant pipeline and the vacuum pipeline to adjust the temperature to achieve the appropriate cooling temperature.

[0019] The intelligent terminal has a display screen, and an input and control system; the intelligent terminal can be controlled wirelessly; and the electronic management system can run in a wireless local area network.

[0020] Beneficial effects of the present invention:

[0021] A continuous cooling blister mold is provided, which is designed and installed in a cooling device inside a cylindrical mold barrel, connected to the outside through a special structure, and a cooling medium is introduced from this special structure. After forming on the mold barrel, a rapid heat exchange is performed, and then the heat is taken away through the blister pipe, thereby achieving the effect of cooling the mold barrel and stabilizing the surface temperature of the mold. With this continuous cooling mold production process, the sheet can be directly blister-shaped and cooled after being extruded from the extrusion mold, shortening the intermediate turnover of the sheet and the large investment in the back-end process equipment, which is of great help in reducing costs and production difficulties.

[0022] The cooling device of the present invention is used to achieve mold cooling and temperature stabilization control, thereby ensuring the shape stability and smooth demoulding of the continuous blister production material. At the same time, since the mold temperature is stable, the uniformity of product quality is also effectively guaranteed. At the same time, the cooling nozzles located inside the mold have their own partitions, and each partition is connected to the external pipeline respectively, so as to achieve different degrees of cooling and temperature control for different tendencies of the mold. The number of partitions can be flexibly set according to the size of the mold and the production speed.

[0023] The invention has a simple structure, low cost, small footprint, and is easy to install and maintain. The supporting function of the rotary joint is fully utilized to install the sleeve inside, which has a significant effect on simplifying the system structure. The sleeve is used to pass the cooling medium of each zone into the zone, so that a large-width mold can also achieve the same cooling effect. The online cooling method is used to shorten the process steps, greatly save equipment and labor costs, and has a good effect on improving production capacity. The invention stabilizes the mold temperature, which can improve the quality stability of blister products, so that the material can crystallize at the required temperature and maximize the physical properties of the product. It also provides a development window for later closed-loop control, which promotes the improvement of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the blister mold.

[0025] Figure 2It is a schematic diagram of the front view structure of the blister mold.

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the blister mold.

[0027] Figure 4 It is a schematic diagram of the mold barrel structure.

[0028] Figure 5 Schematic diagram of the internal structure of the mold barrel.

[0029] Figure 6 Schematic diagram of the internal structure of the casing.

[0030] Figure 7 It is a schematic diagram of the cross-sectional structure of the cooling group.

[0031] In the figure: 1. mold cylinder, 2-3. exhaust port, 4. sleeve, 5. seat bearing, 6. swivel joint, 7. locking sleeve, 8. locking nut, 9. sealing plate, 10. connecting piece, 11-13. conduit, 14-16. cooling group, 17. nozzle. DETAILED DESCRIPTION

[0032] The principles and features of the present invention are described below in conjunction with embodiments, and the examples are only used to explain the present invention and are not used to limit the scope of the present invention. The content of the present invention is described in detail below.

[0033] Embodiment 1: A continuously cooled blister mold, comprising a mold barrel 1, a seat bearing 5 supporting the mold rotation and a rotary joint 6 fixing the end of the mold, characterized in that: it also has a sleeve 4 passing through the center of the mold barrel 1, and a plurality of cooling groups 14-16 installed on the sleeve 4; the sleeve 4 is fixed by a locking sleeve 7 at both ends of the mold barrel 1, and the concentricity of the sleeve 4 and the mold barrel 1 is ensured, and the sleeve 4 is fixed and tightened by a locking nut 8 to ensure that the sleeve 4 does not sag; a plurality of conduits 11-13 are installed in the sleeve 4, one end of the conduits 11-13 is respectively connected to the connector 10, and the other end is respectively connected to the corresponding refrigerant interface outside the mold barrel; the connector 10 is connected to the cooling groups 14-16;

[0034] The cooling groups 14-16 are constructed as follows: having nozzles 17; the nozzles 17 are arranged in an arc shape to spray a larger surface area;

[0035] According to the flow rate required for cooling, select the appropriate aperture of the nozzle 17; according to the required cooling rate, adjust the distance from the nozzle 17 to the mold barrel and the spray angle of the nozzle 17.

[0036] The spray angle of the nozzle 17 is 40° to 100°;

[0037] The aperture of the nozzle 17 is K = 0.8-2.2 mm, and the distance from the nozzle 17 to the die barrel is H = 45-155 cm.

[0038] Flow meters and valves are installed on the refrigerant access pipelines to control the refrigerant flow of the corresponding cooling groups. The mold is also provided with vacuum pipeline suction ports 2-3, which are respectively connected to the external vacuum fans. Valves are installed on the pipelines to control the amount of air drawn away by the valve opening.

[0039] The air volume and the refrigerant volume cooperate with each other to achieve the effect of constant mold temperature.

[0040] In addition, gears or sprockets are installed at both ends of the shaft head of the mold and near the seat bearing 5, which are used for external rotational power input to drive the mold cylinder 1 to rotate and complete the blistering;

[0041] An openable sealing plate 9 is installed on the sleeve 4 to facilitate installation, operation and maintenance when the conduits 11-13 are connected to the cooling groups 14-16. After the work is completed, the sealing plate 9 is closed;

[0042] Temperature sensors are also installed in the areas of the mold barrel 1 corresponding to the cooling groups 14-16 to sense the cooling temperature of each area of ​​the mold; the valves are all solenoid valves, and corresponding electronic management systems are designed to implement automatic control.

[0043] The electronic management system also includes intelligent terminals, management systems, and central processing units. Users input the temperatures required for cooling in various areas of the mold barrel through the intelligent terminals, and the temperature sensors feed back the temperatures of various areas to the central processing unit in real time. After calculation, the central processing unit controls the solenoid valves of the refrigerant pipeline and the vacuum pipeline to adjust the temperature to achieve the appropriate cooling temperature.

[0044] The intelligent terminal has a display screen, and an input and control system; the intelligent terminal can be controlled wirelessly; and the electronic management system can run in a wireless local area network.

[0045] When using it, you only need to input control data into the intelligent terminal to realize automatic operation management, implement continuous mold cooling, and perform production work.

[0046] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A continuously cooled plastic blister mold, comprising a mold cylinder, a seat bearing for supporting the rotation of the mold, and a rotary joint for fixing the end of the mold, characterized in that: It also has a sleeve passing through the center of the mold barrel, and several cooling groups are installed on the sleeve along the axial direction of the sleeve; the sleeve is fixed by locking sleeves at both ends of the mold barrel to ensure the concentricity of the sleeve and the mold barrel, and the sleeve is fixed and tightened by a locking nut to ensure that the sleeve does not sag; multiple conduits are installed in the sleeve, one end of the conduit is connected to the connecting piece, and the other end is connected to the corresponding refrigerant interface outside the mold barrel; each connecting piece is connected to each cooling group; the mold is also provided with a vacuum pipeline suction port connected to the fan, and gears or sprockets are installed at both ends of the shaft head of the mold and near the seat bearing for external rotational power input to drive the mold barrel to rotate and complete the vacuum forming; Several cooling groups have their own partitions, and each partition is connected to the external pipeline; each area in the mold barrel corresponding to the cooling group is also equipped with a temperature sensor for sensing the cooling temperature of each area of ​​the mold; flow meters and valves are installed on the refrigerant access pipelines to control the refrigerant flow of the corresponding cooling group; the aperture of the nozzle is K = 0.8-2.2mm, and the distance from the nozzle to the mold barrel is H = 45-155cm.

2. A continuously cooled blister mold according to claim 1, characterized in that: The cooling group has nozzles; the nozzles are arranged in an arc to spray a larger surface area.

3. A continuously cooled blister mold according to claim 1, characterized in that: A valve is installed on the vacuum pipeline to control the amount of air being drawn away.

4. A continuously cooled blister mold as claimed in claim 3, characterized in that: An openable sealing plate is installed on the sleeve to facilitate installation, operation, inspection and maintenance when the conduit is connected to the cooling group.

5. A continuously cooled blister mold according to claim 1, characterized in that: The nozzle spray angle is 40°~100°.

6. A continuously cooled blister mold according to any one of claims 1 to 4, characterized in that: The valves are all solenoid valves, and corresponding electronic management systems are designed to implement automatic control.

7. A continuously cooled blister mold according to claim 6, characterized in that: The electronic management system also includes intelligent terminals, management systems, central processing units, etc. Users input the temperatures that need to be cooled in each area of ​​the mold barrel through the intelligent terminals. The temperature sensors provide real-time feedback of the temperatures of each area to the central processing unit. After calculation, the central processing unit controls the solenoid valves of the refrigerant pipeline and the vacuum pipeline to adjust to achieve the appropriate cooling temperature.

8. A continuously cooled blister mold according to claim 7, characterized in that: The intelligent terminal has a display screen, and an input and control system; the intelligent terminal is controlled wirelessly; and the electronic management system runs in a wireless local area network.

Images