Anti-deformation blister cooling and shaping mold

Abstract

The utility model belongs to blister technology field, specifically disclose a kind of anti-deformation's blister bubble shell cooling setting mould, comprising: mould outer frame, blister mould and air hole, the mould outer frame is hollow frame, the blister mould is slidably connected in the inside of mould outer frame, the air hole is set up on blister mould and penetrates blister mould;Cooling flow guide channel is arranged in the blister mould, the upper surface of mould outer frame is concave and forms plastic sheet storage tank, the lower surface of blister mould is screw connected with air cock, the air cock is communicated with air hole, the both ends of cooling flow guide channel are connected with joint pipe, the lower surface of blister mould is fixedly connected with reinforcing frame.In use, the mode of liquid cooling is used, the blister mould can be kept low temperature, after contacting with high-temperature plastic sheet, the blister mould is not prone to large temperature difference, heat can be quickly taken away by cooling liquid, so high-temperature plastic sheet can be quickly cooled and formed.

Description

Technical Field

[0001] This utility model relates to the field of vacuum forming technology, specifically to a mold for cooling and shaping vacuum blister packs that prevents deformation. Background Technology

[0002] Vacuum forming is a plastic processing technique. The main principle is to heat a flat, rigid plastic sheet until it softens, then use a vacuum to adhere it to the surface of a mold, and finally allow it to cool and solidify.

[0003] Vacuum forming molds are typically made of alloy materials, such as aluminum alloy, stainless steel, and copper alloy. After the plastic sheet is heated, it is attached to the surface of the vacuum forming mold by air pressure control. The vacuum forming mold is heated by the high temperature of the plastic sheet, and thermal expansion and contraction make the vacuum forming mold prone to deformation. Currently, the cooling of the vacuum forming process is usually achieved by air cooling, which blows the plastic sheet from above to cool and shape it. However, this method can only indirectly dissipate heat from the vacuum forming mold, resulting in poor heat dissipation and the mold being in a high-temperature state, making it prone to expansion and deformation. Utility Model Content

[0004] The purpose of this invention is to provide a deformation-resistant blister pack cooling and shaping mold to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a deformation-resistant blister pack cooling and shaping mold, comprising:

[0006] Mold frame, vacuum forming mold, and air vents;

[0007] The outer frame of the mold is a hollow frame, the vacuum forming mold is slidably connected to the inside of the outer frame, and the air holes are opened on the vacuum forming mold and penetrate through the vacuum forming mold.

[0008] The vacuum forming mold is equipped with a cooling channel.

[0009] Preferably, the upper surface of the mold frame is recessed to form a plastic sheet storage groove.

[0010] Preferably, an air nozzle is screwed onto the lower surface of the vacuum forming mold, and the air nozzle communicates with an air hole.

[0011] Preferably, both ends of the cooling guide channel are connected to connector pipes.

[0012] Preferably, a reinforcing frame is fixedly connected to the lower surface of the vacuum forming mold.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] When in use, liquid cooling is used to keep the thermoforming mold at a low temperature. After contact with the high-temperature plastic sheet, the thermoforming mold is less likely to experience a large temperature difference. The heat can be quickly carried away by the coolant, which can also quickly cool down the high-temperature plastic sheet and form it. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the mold outer frame and the vacuum forming mold of this utility model.

[0017] In the diagram: 1. Mold outer frame; 2. Plastic sheet storage tank; 3. Vacuum forming mold; 4. Air hole; 5. Air nozzle; 6. Cooling guide channel; 7. Connector pipe; 8. Reinforcing frame. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Example 1:

[0021] Please see Figure 1-2 This utility model provides a technical solution: a deformation-resistant blister cooling and shaping mold, comprising: a mold outer frame 1, a blister mold 3, and air holes 4;

[0022] The mold outer frame 1 is a hollow frame, the vacuum forming mold 3 is slidably connected to the inside of the mold outer frame 1, the air hole 4 is opened on the vacuum forming mold 3 and penetrates the vacuum forming mold 3; the vacuum forming mold 3 is provided with a cooling guide channel 6.

[0023] Analysis of the above content: In use, the plastic sheet is placed on the upper surface of the outer frame 1 of the mold, and the edge of the plastic sheet is pressed by the pneumatic clamping mechanism. A Y-shaped tube is connected to the air hole 4. The two external branches of the Y-shaped tube are respectively connected to a blower and a vacuum pump (both external branches of the Y-shaped tube are equipped with valves). When it is necessary to blow up and expand the plastic sheet, the blower blows air onto the plastic sheet (the valve of the branch connected to the vacuum pump of the Y-shaped tube is closed, and the valve of the branch connected to the blower is open). Air enters upward through the Y-shaped tube, blowing up and expanding the heated plastic sheet.

[0024] Subsequently, the vacuum forming mold 3 is pushed on the telescopic pushing mechanism (such as a cylinder or hydraulic cylinder), causing the upper surface of the vacuum forming mold 3 to protrude to the upper surface of the mold outer frame 1. Then, the branch valve connected to the Y-shaped tube and the vacuum suction pump is opened, and the branch valve connected to the blower is closed. The vacuum suction pump then draws air between the vacuum forming mold 3 and the plastic sheet, expelling the air and causing the plastic sheet to adhere tightly to the vacuum forming mold 3. Since the vacuum forming mold 3 is in a low-temperature state, the high-temperature plastic sheet can quickly dissipate heat and cool down to form.

[0025] Afterwards, the vacuum forming mold 3 descends and separates from the formed plastic sheet.

[0026] Example 2:

[0027] Please see Figure 1-2 Based on Embodiment 1, this utility model provides a technical solution: the upper surface of the mold outer frame 1 is recessed to form a plastic sheet storage groove 2.

[0028] Analysis of the above: The design of the plastic sheet storage slot 2 facilitates the positioning of the plastic sheet. The plastic sheet moves laterally into the storage slot 2, and is not easily moved forward or backward.

[0029] Example 3:

[0030] Please see Figure 1-2 Based on Embodiment 1, this utility model provides a technical solution: an air nozzle 5 is screwed onto the lower surface of the vacuum forming mold 3, and the air nozzle 5 is connected to the air hole 4.

[0031] Analysis of the above content: At the connection between the air nozzle 5 and the air hole 4, a sealing ring is embedded. The air nozzle 5 is a hollow tube with openings at both ends. The lower end of the air nozzle 5 is connected to one branch of the Y-shaped tube. The other two branches of the Y-shaped tube are connected to the blower and the vacuum pump respectively through hoses.

[0032] Example 4:

[0033] Please see Figure 1-2 Based on Embodiment 1, this utility model provides a technical solution: both ends of the cooling guide channel 6 are connected to connector pipes 7.

[0034] Analysis of the above content: One of the connectors 7 at both ends is a liquid inlet pipe and the other is a liquid outlet pipe. The outer ends of the liquid inlet pipe and the liquid outlet pipe are connected to other components of the liquid cooling system through pipes (other components include conventional structures such as coolant tank, hollow heat sink, and cooling fan, and their connection methods adopt existing connection methods, which will not be described in detail here).

[0035] Example 5:

[0036] Please see Figure 1-2 Based on Embodiment 1, this utility model provides a technical solution: a reinforcing frame 8 is fixedly connected to the lower surface of the vacuum forming mold 3.

[0037] Analysis of the above content: The reinforcing frame 8 is connected to the lower surface of the blister mold 3 by screws. The reinforcing frame 8 strengthens the overall structure of the blister mold 3 and further reinforces the blister mold 3 to prevent deformation.

[0038] Furthermore, the innovative aspects of this solution will be explained.

[0039] Liquid cooling structure: A cooling channel is set in the vacuum forming mold and connected to the liquid cooling system through a connector pipe. The coolant is circulated to remove heat, replacing the traditional air cooling method, and achieving direct cooling of the mold, avoiding large temperature differences caused by the contact of the mold with the high-temperature plastic sheet.

[0040] Reinforced frame design: A reinforced frame is fixedly connected to the lower surface of the vacuum forming mold. The overall structural strength of the mold is enhanced by screws, which further prevents the mold from deforming under high temperature and pressure.

[0041] Plastic sheet positioning structure: The upper surface of the mold frame is recessed to form a plastic sheet storage groove, which facilitates the positioning of the plastic sheet, reduces its displacement during processing, and improves molding accuracy.

[0042] Integrated air circuit design: The lower surface of the vacuum forming mold is screwed with an air nozzle and connected to the air hole. The blower and vacuum pump are connected through a Y-shaped tube to realize integrated air circuit control of blowing expansion and vacuum adsorption, simplifying the operation process.

[0043] Specifically, a comparison of relevant test data and practical application data for this solution.

[0044]

[0045] Data Description

[0046] Mold temperature change rate: refers to the average rate at which the surface temperature of the mold drops from 80℃ to 50℃ after the plastic sheet comes into contact with the mold. A liquid cooling system rapidly removes heat through coolant circulation, causing the mold temperature to drop faster and shortening the cooling time.

[0047] Maximum mold deformation: The deformation at key points on the mold surface is measured after 100 consecutive production cycles. The reinforced frame and liquid cooling structure reduce mold deformation caused by thermal expansion and contraction, improving mold precision.

[0048] Plastic sheet forming time: The total time from heating the plastic sheet to completing cooling and shaping. Rapid cooling allows the plastic sheet to be formed faster, improving production efficiency.

[0049] Product molding pass rate: This is the percentage of 1000 products produced that have no defects such as deformation or missing material. Precise mold temperature control and positioning structure reduce molding defects and improve product quality.

[0050] Data Validity Statement

[0051] Test conditions: Both sets of molds were made of the same material (aluminum alloy) and tested in the same production environment (temperature 25℃, humidity 50%). The plastic sheet material and thickness were the same, and the heating temperature was 150℃.

[0052] Data source: Mold temperature was monitored in real time using a temperature sensor, mold deformation was measured using a coordinate measuring machine, molding time was recorded using a stopwatch, and product qualification rate was manually inspected. The number of test samples was 1000 pieces, and the data is statistically significant.

[0053] Reasonableness of comparison: Traditional air-cooled molds use top air blowing cooling, while the mold of this utility model adopts liquid cooling + reinforced frame structure. Other production process parameters remain the same, ensuring that the comparison results are only due to the difference in mold structure.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold for cooling and shaping blister packs to prevent deformation, characterized in that, include: Mold frame (1), vacuum forming mold (3), and air vent (4); The outer frame (1) of the mold is a hollow frame, the vacuum forming mold (3) is slidably connected to the inside of the outer frame (1), and the air hole (4) is opened on the vacuum forming mold (3) and penetrates the vacuum forming mold (3). The vacuum forming mold (3) is provided with a cooling channel (6).

2. The anti-deformation blister pack cooling and shaping mold according to claim 1, characterized in that: The upper surface of the outer frame of the mold (1) is recessed to form a plastic sheet storage groove (2).

3. The anti-deformation blister pack cooling and shaping mold according to claim 1, characterized in that: An air nozzle (5) is screwed onto the lower surface of the vacuum forming mold (3), and the air nozzle (5) is connected to the air hole (4).

4. The anti-deformation blister pack cooling and shaping mold according to claim 1, characterized in that: Both ends of the cooling guide channel (6) are connected to connector pipes (7).

5. The anti-deformation blister pack cooling and shaping mold according to claim 1, characterized in that: A reinforcing frame (8) is fixedly connected to the lower surface of the vacuum forming mold (3).

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