A device for detecting the heat shrinkage of a metallized film

Abstract

This utility model relates to the field of testing device technology and discloses a metallized film heat shrinkage rate testing device, including a cabinet. A hot air blower is installed on the cabinet, and an air outlet pipe is connected to the output end of the hot air blower and passes through the cabinet. An oxygen absorption mechanism is provided on the cabinet, and a protective mechanism is provided inside the cabinet. The oxygen absorption mechanism includes an activated copper plate, which is located at the air outlet of the air outlet pipe. This utility model utilizes the oxidation reaction of the activated copper plate with oxygen at high temperature. Combined with a motor-driven rotating rod and linkage structure, the activated copper plate continuously rotates, increasing the contact area with oxygen in the hot air, efficiently consuming oxygen inside the cabinet, ensuring the stability of the physical properties of the metallized film during the testing process, and avoiding interference from oxidation on the heat shrinkage rate test results.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically a metallized thin film thermal shrinkage rate detection device. Background Technology

[0002] Metallized thin films are composite materials formed by depositing an extremely thin metal layer on the surface of a plastic film through processes such as vacuum evaporation and magnetron sputtering. Metallized thin films are often used to manufacture precision electronic components such as capacitors, flexible circuit boards, and electronic packaging materials, such as the electrode spacing of capacitors and the circuit layout of circuit boards. If the thermal shrinkage rate of the film is too large, it will cause significant changes in the size of the component, affecting its electrical performance and structural stability.

[0003] When testing the heat shrinkage rate of metallized thin films, vacuum ovens and hot air ovens are commonly used to heat the films. Vacuum ovens have a slow heating rate and poor temperature uniformity. At the same time, the vacuum reduces the air pressure on the film surface, which can easily lead to local bulging or deformation of the film. Furthermore, after the vacuum oven is opened, outside air can still easily react with the metallized film. Therefore, hot air ovens are usually used for heating. However, the metallized layer is prone to reacting with oxygen at high temperatures to form oxides, which can cause the film to become brittle or peel off, altering its shrinkage behavior and affecting the test results of the heat shrinkage rate of the metallized film. Therefore, a heat shrinkage rate testing device for metallized thin films is proposed to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a device for detecting the thermal shrinkage rate of metallized thin films, thereby solving the problem that metallized thin films are prone to reacting with oxygen during the detection of the thermal shrinkage rate of metal.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a metallized film heat shrinkage rate testing device, including a cabinet, a hot air blower installed on the cabinet, an air outlet pipe connected to the output end of the hot air blower and the air outlet pipe penetrating the cabinet, an oxygen intake mechanism installed on the cabinet, and a protective mechanism installed inside the cabinet.

[0006] The oxygen absorption mechanism includes an activated copper plate, which is disposed at the air outlet of the air outlet pipe.

[0007] Preferably, the oxygen absorption mechanism further includes a rotating rod that rotates through the cabinet. The active copper plate is fixedly sleeved on the rotating rod. Multiple rotating rods and active copper plates are provided. A rotating component is connected to the rotating rod.

[0008] Preferably, the rotating assembly includes a mounting plate, a motor, and a swing block. The mounting plate is fixedly connected to the back of the cabinet, the motor is fixedly mounted on the mounting plate, and the output end of the motor is connected to one of the rotating rods via a gear set. The swing block is fixed to one end of the rotating rod. There are multiple rotating rods and multiple swing blocks, and the multiple swing blocks are connected by a linkage rod.

[0009] Preferably, the active copper plate has a groove, and a mesh plate is fixedly installed on the inner wall of the cabinet, with the mesh plate located directly below the active copper plate.

[0010] Preferably, a placement plate is fixedly connected to the inner wall of the cabinet, and the protective mechanism is disposed on the placement plate. The protective mechanism includes a placement slot, a nitrogen tank, and a nitrogen blowing assembly. The placement slot is opened on the placement plate, the nitrogen tank is disposed at the bottom of the inner wall of the cabinet, and the nitrogen blowing assembly is disposed on the nitrogen tank.

[0011] Preferably, the nitrogen blowing assembly includes an air pump, a connecting pipe, and an air outlet. The air pump is installed in and connected to the nitrogen tank. The air outlet is located at the bottom of the placement plate and connected to the placement groove. The air outlet is connected to the air pump via the connecting pipe.

[0012] Preferably, the placement plate has an air inlet hole that is connected to the placement slot, and the air inlet hole is connected to the nitrogen tank through a circulation pipe.

[0013] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0014] 1. This metallized film heat shrinkage rate testing device utilizes the oxidation reaction of an active copper plate with oxygen at high temperature. Combined with a motor-driven rotating rod and linkage structure, the active copper plate is continuously rotated, increasing the contact area with oxygen in the hot air, efficiently consuming the oxygen inside the cabinet, ensuring the stability of the physical properties of the metallized film during the testing process, and avoiding interference from oxidation on the heat shrinkage rate testing results.

[0015] 2. This metallized thin film thermal shrinkage rate testing device forms a nitrogen protective layer above the placement tank through a nitrogen box and a nitrogen blowing assembly. This physical barrier isolates residual oxygen from contact with the metallized thin film and works synergistically with the oxygen absorption mechanism: the former consumes oxygen in the hot air, while the latter creates an inert gas environment on the film surface. This dual protection further reduces the risk of oxidation and ensures that the change in film size during testing is caused only by the thermal shrinkage effect induced by temperature, thereby improving the accuracy and reliability of the thermal shrinkage rate data. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2This is a schematic diagram of the back of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of this utility model;

[0019] Figure 4 This is an enlarged schematic diagram of point A of this utility model;

[0020] Figure 5 This is a schematic diagram of the active copper plate of this utility model;

[0021] Figure 6 This is a cross-sectional view of the protection mechanism of this utility model.

[0022] In the diagram: 1. Cabinet; 2. Hot air blower; 3. Air outlet duct; 4. Oxygen intake mechanism; 41. Rotating rod; 42. Activated copper plate; 43. Groove; 44. Mounting plate; 45. Motor; 46. Swing block; 47. Linkage rod; 48. Mesh plate; 5. Placement plate; 6. Protection mechanism; 61. Placement slot; 62. Nitrogen tank; 63. Air pump; 64. Connecting pipe; 65. Air outlet; 66. Air inlet; 67. Circulation pipe. Detailed Implementation

[0023] 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.

[0024] 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 component 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.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0027] Metallized thin films require thermal shrinkage testing during production. Existing testing methods can easily lead to problems such as bulging and deformation of the film surface or oxidation of the film layer. In actual research, we found that the gas pressure can be balanced by introducing an inert gas, such as nitrogen, into the device. However, this method consumes a large amount of inert gas, significantly increasing costs. Furthermore, when nitrogen is directly introduced, the original air inside the chamber is difficult to completely replace, and residual oxygen may still react with the metallized thin film at high temperatures. Moreover, after heating is completed, directly turning off the heating and nitrogen will cause the chamber to cool and shrink, drawing in outside air and leading to sample oxidation.

[0028] For this purpose, please refer to Figure 1-6 One embodiment of this utility model is: a metallized film heat shrinkage rate testing device, including a cabinet 1, a cabinet door hinged to the front of the cabinet 1, an observation window on the cabinet door for observing the heating of the metallized film inside the cabinet 1, a hot air blower 2 installed on the cabinet 1, an air outlet pipe 3 connected to the output end of the hot air blower 2 and penetrating the cabinet 1 for heating the inside of the cabinet 1, and an oxygen absorption mechanism 4 installed on the cabinet 1 for absorbing the oxygen blown out by the hot air blower 2 to prevent the oxygen from reacting with the metallized film in a high-temperature environment, thereby affecting the heat shrinkage rate testing effect;

[0029] The oxygen absorption mechanism 4 includes a rotating rod 41, an active copper plate 42, a groove 43, a mounting plate 44, a motor 45, and a swing block 46. The rotating rod 41 rotates through the back of the cabinet 1. The active copper plate 42 is fixedly sleeved on the rotating rod 41. The groove 43 is opened on the active copper plate 42 to increase the surface area of ​​the active copper plate 42.

[0030] Mounting plate 44 is fixedly connected to the back of cabinet 1. Motor 45 is fixedly mounted on mounting plate 44, and the output end of motor 45 is connected to one of the rotating rods 41 through a gear set. Swing block 46 is fixed to one end of rotating rod 41. There are five rotating rods 41 and five swing blocks 46. The five swing blocks 46 are connected through linkage rod 47. Through the setting of motor 45, swing block 46 and linkage rod 47, multiple active copper plates 42 can be driven to flip, thereby increasing the contact area between active copper plates 42 and oxygen, and thus improving the oxygen absorption effect.

[0031] A mesh plate 48 is fixedly installed on the inner wall of the cabinet 1, and the mesh plate 48 is located directly below the active copper plate 42. The mesh plate 48 can evenly blow the hot air after oxygen absorption into the lower part, avoiding the influence of excessive airflow on the metallized film. A placement plate 5 is fixedly connected to the inner wall of the cabinet 1, and a protective mechanism 6 is provided on the placement plate 5.

[0032] Working principle: The metallized film to be tested for heat shrinkage rate is placed on the placement plate 5. Hot air is blown into the cabinet 1 through the air outlet 3 by the moving hot air blower 2 to heat the metallized film. The hot air comes into contact with the active copper plate 42. At high temperature, the active copper plate 42 reacts with the oxygen in the hot air to form copper oxide, thus consuming the oxygen in the hot air. At the same time, the motor 45 is started. The motor 45 drives one of the rotating rods 41 to rotate through the gear set. Then, through the swing block 46 and the linkage rod 47, the other four rotating rods 41 rotate synchronously. The rotation of the rotating rods 41 will cause the active copper plate 42 to flip, thereby increasing the contact area between the active copper plate 42 and oxygen, thereby increasing the oxygen consumption and reducing the oxygen content inside the cabinet 1. This avoids the oxygen concentration being too high and reacting with the metallized film, which would affect the heat shrinkage rate test effect of the metallized film. The hot air after oxygen absorption will be dispersed through the mesh on the mesh plate 48, so that it is blown into the lower part more evenly.

[0033] Please see Figure 1-6 Based on the above embodiments, in another embodiment of the present invention, the protection mechanism 6 includes a placement slot 61, a nitrogen tank 62, and a nitrogen blowing assembly. The placement slot 61 is opened on the placement plate 5, the nitrogen tank 62 is set at the bottom of the inner wall of the cabinet 1, and the nitrogen blowing assembly is set on the nitrogen tank 62.

[0034] The nitrogen blowing assembly includes an air pump 63, a connecting pipe 64, and an air outlet 65. The air pump 63 is installed in the nitrogen tank 62 and connected to the nitrogen tank 62. The air pump 63 can blow the nitrogen in the nitrogen tank 62 onto the upper surface of the metallized film, thereby forming a nitrogen protective layer to prevent residual oxygen in the hot gas from contacting the metallized film and causing an oxidation reaction.

[0035] An air outlet 65 is located at the bottom of the placement plate 5 and is connected to the placement groove 61. The air outlet 65 is connected to the air pump 63 through a connecting pipe 64. An air inlet 66 is located at the bottom of the placement plate 5 and is connected to the placement groove 61. The air inlet 66 is connected to the nitrogen tank 62 through a circulation pipe 67.

[0036] Working principle: The metallized film is placed inside the placement tank 61. By starting the air pump 63, nitrogen gas in the nitrogen tank 62 is blown out from the air outlet 65 through the connecting pipe 64, thereby forming a protective layer on top of the metallized film, forming a physical barrier to isolate oxygen from contact with the metallized film and prevent oxygen from reacting with the metallized film, thus avoiding affecting the accuracy of the heat shrinkage rate detection. The nitrogen gas will then enter the nitrogen tank 62 through the air inlet 66 and the circulation pipe 67 to realize the recycling of nitrogen gas and reduce nitrogen loss.

[0037] This utility model provides a device for detecting the thermal shrinkage rate of metallized thin films. There are many methods and approaches to implement this technical solution, and the above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A device for detecting the thermal shrinkage rate of metallized thin films, comprising a cabinet (1), characterized in that: A hot air blower (2) is installed on the cabinet (1). An air outlet pipe (3) is connected to the output end of the hot air blower (2), and the air outlet pipe (3) passes through the cabinet (1). An oxygen intake mechanism (4) is installed on the cabinet (1). A protective mechanism (6) is installed inside the cabinet (1). The oxygen absorption mechanism (4) includes an active copper plate (42), which is disposed at the air outlet of the air outlet pipe (3).

2. The metallized thin film thermal shrinkage rate detection device according to claim 1, characterized in that: The oxygen absorption mechanism (4) also includes a rotating rod (41), which rotates through the cabinet (1). The active copper plate (42) is fixedly sleeved on the rotating rod (41). Multiple rotating rods (41) and active copper plates (42) are provided. A rotating component is connected to the rotating rod (41).

3. The metallized thin film thermal shrinkage rate detection device according to claim 2, characterized in that: The rotating assembly includes a mounting plate (44), a motor (45), and a swing block (46). The mounting plate (44) is fixedly connected to the back of the cabinet (1). The motor (45) is fixedly mounted on the mounting plate (44). The output end of the motor (45) is connected to one of the rotating rods (41) through a gear set. The swing block (46) is fixed to one end of the rotating rod (41). There are multiple rotating rods (41) and multiple swing blocks (46). The multiple swing blocks (46) are connected through a linkage rod (47).

4. The metallized thin film thermal shrinkage rate detection device according to claim 3, characterized in that: The active copper plate (42) has a groove (43) and a mesh plate (48) is fixedly installed on the inner wall of the cabinet (1), and the mesh plate (48) is located directly below the active copper plate (42).

5. The metallized thin film thermal shrinkage rate detection device according to claim 4, characterized in that: The inner wall of the cabinet (1) is fixedly connected to a placement plate (5). The protection mechanism (6) is set on the placement plate (5). The protection mechanism (6) includes a placement slot (61), a nitrogen tank (62), and a nitrogen blowing assembly. The placement slot (61) is opened on the placement plate (5). The nitrogen tank (62) is set at the bottom of the inner wall of the cabinet (1). The nitrogen blowing assembly is set on the nitrogen tank (62).

6. The metallized thin film thermal shrinkage rate detection device according to claim 5, characterized in that: The nitrogen blowing assembly includes an air pump (63), a connecting pipe (64), and an air outlet (65). The air pump (63) is installed in the nitrogen tank (62) and connected to the nitrogen tank (62). The air outlet (65) is located at the bottom of the placement plate (5) and connected to the placement groove (61). The air outlet (65) is connected to the air pump (63) through the connecting pipe (64).

7. The metallized thin film thermal shrinkage rate detection device according to claim 6, characterized in that: The placement plate (5) has an air inlet (66) which is connected to the placement groove (61), and the air inlet (66) is connected to the nitrogen tank (62) through the circulation pipe (67).

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