A punching tool for thin film water vapor transmission test samples

Abstract

The utility model relates to a kind of punching tool for film water vapor permeation quantity test sample, including the main body as punching carrier. Main body is provided with the punching assembly for being punched to test sample and the sink for placing test sample. Punching assembly includes handle and the support seat for supporting handle. Handle and support seat are connected by first spring piece, and support seat is provided with the slide way embedded with one end of handle. First spring piece is arranged in slide way. Handle is also provided with pressing plate and at least two punching heads at the end away from support seat. Pressing plate is provided with the hole for at least two punching heads to pass through. The utility model integrates punching assembly and sink as a whole by setting main body as unified punching carrier, solves the dispersion problem of "pressing plate and handle type hole opener separation operation" in prior art, simplifies the operation process of operator, and reduces operation complexity.

Description

Technical Field

[0001] This utility model relates to the field of perforation technology, and in particular to a perforation tool for testing samples for water vapor transmission through thin films. Background Technology

[0002] Plastic films, due to their barrier properties, are widely used in packaging and other fields. The water vapor transmission rate of these films is a key indicator of their barrier performance, and accurate detection of this indicator is crucial for evaluating film quality and applicable scenarios. Currently, the industry commonly uses infrared spectroscopy to analyze and detect the water vapor transmission rate of plastic films. The detection principle is as follows: a pre-treated film sample is clamped between test chambers, with nitrogen gas at a stable relative humidity flowing on one side of the film and dry nitrogen gas flowing on the other. Due to the humidity difference between the two sides, water vapor diffuses from the high-humidity side through the film to the low-humidity side. On the low-humidity side, the water vapor that has passed through the film is carried to the infrared moisture sensor by the flowing dry nitrogen gas. Different concentrations of water vapor produce different light signals. By analyzing and calculating the light signals, the water vapor concentration can be obtained, and thus the water vapor transmission rate of the sample can be deduced.

[0003] During the aforementioned testing process, specific testing equipment has specific requirements for the shape and structure of the test sample. For example, the Langguang C390H equipment requires the test sample to be a circle with an area of ​​50 cm², and holes with a diameter of 5 mm must be drilled at both ends of the sample's diameter. The purpose of these holes is to allow the sample to be neatly and tightly adhered to the test chamber through grease, so that the two plastic pillars inside the test chamber's sealing cover can pass through the holes in the sample and embed themselves into the test chamber wall, thereby ensuring the test chamber's airtightness and providing a basic condition for the accuracy of the test.

[0004] To meet the aforementioned sample processing requirements, current equipment manufacturers primarily provide perforation tools including circular pressure plates with holes and handle-type press-type perforators. When preparing test samples, operators must use a two-handed approach: the left hand holds the circular pressure plate to secure the sample, while the right hand holds the handle-type press-type perforator, applying significant external force and rotating the perforator vertically 360° until the desired circular hole is formed on the sample. However, these existing perforation tools have significant drawbacks: firstly, the handle-type press-type perforator's cutting edge tends to dull after prolonged use; secondly, the operation relies on manual control of the pressing and rotating motion, and excessive force can easily deform the sample membrane or cause the perforated hole to shift position. These problems directly result in the sample not fitting neatly and tightly within the test chamber as required, compromising the chamber's seal and ultimately severely affecting the accuracy of the membrane water vapor transmission rate test results, making it difficult to meet industry requirements for testing precision.

[0005] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a punching tool for testing samples of thin-film water vapor transmission rate, comprising a main body serving as a punching carrier. The main body is provided with a punching assembly for punching the test sample and a platform for placing the test sample. The punching assembly includes a handle and a support base for supporting the handle. The handle and the support base are connected by a first spring member, and the support base has a slide rail that engages with one end of the handle. The first spring member is disposed within the slide rail. A pressure plate and at least two punching heads are also provided at the end of the handle away from the support base. The pressure plate has holes for the at least two punching heads to pass through.

[0007] According to a preferred embodiment, a support base is disposed on the main body, and the support base is hollow to form a space for accommodating a first spring member and a slide rail. One end of the first spring member is connected to the vertically downward end inside the hollow support base. The other end of the first spring member is connected to the end of the handle located inside the support base.

[0008] According to a preferred embodiment, the slide extends vertically on the side of the support near the handle end, and engages one end of the handle inside the hollow interior of the support.

[0009] According to a preferred embodiment, the pressure plate is circular, and at least two punch heads are correspondingly arranged on the diameter of the pressure plate and symmetrical about the center of the pressure plate.

[0010] According to a preferred embodiment, the punch head is configured as a cylindrical punch. The punch head is detachably connected to the handle.

[0011] According to a preferred embodiment, the pressure plate is connected to the handle via a first link and a second link. The first link and the second link are hollow. The first link is nested within the second link, and a spring is provided between the first link and the second link.

[0012] According to a preferred embodiment, a pressure plate is fixedly connected to a first connecting rod. A second connecting rod is fixedly connected to a handle. A spring is connected to the pressure plate and the arm at both ends between the first and second connecting rods, respectively.

[0013] According to a preferred embodiment, a countersunk plate is disposed on the main body corresponding to a pressure plate, and the countersunk plate extends into the main body. Both ends of the countersunk plate in the diametrical direction have circular holes that mate with a punching head. The circular holes penetrate the main body.

[0014] According to a preferred embodiment, a top plate is further provided on the recessed platform. The top plate is embedded in the main body and the recessed platform. The main body is hollow, and a second spring is provided between the top plate and the main body. The top plate is positioned to protrude from the plane of the recessed platform.

[0015] According to a preferred embodiment, the main body is provided with a button for limiting the ejection of the top piece. The vertically downward end of the button is inclined. A top block that engages with the top piece is also provided inside the main body. A groove is provided on the top piece. One end of the top block abuts against the groove. A third spring is connected to the end of the top block away from the top piece. The vertically downward end of the button abuts against the middle of the top block and is inclined towards the top piece. An inclined groove is provided at the middle of the top block. Attached Figure Description

[0016] Figure 1 This is a simplified structural schematic diagram of a perforation tool for testing water vapor transmission rate of a thin film, according to a preferred embodiment of this utility model.

[0017] Figure 2 This is a simplified structural diagram of the support base of the punching tool for testing the water vapor transmission rate of a thin film, according to a preferred embodiment of the present invention, after being cut open.

[0018] Figure 3 This is a simplified structural diagram of the main body of a perforation tool for testing the water vapor transmission rate of a thin film, according to a preferred embodiment of this utility model.

[0019] Figure 4 This is a simplified structural diagram of the punching tool for testing the water vapor transmission rate of a thin film after the main body is cut and the button is pressed down, according to a preferred embodiment of this utility model.

[0020] Figure 5 This is a simplified structural schematic diagram from another perspective of a preferred embodiment of the punching tool for testing the water vapor transmission rate of a thin film provided by this utility model.

[0021] List of reference numerals

[0022] 100: Main body; 200: Drilling assembly; 201: Handle; 202: Support base; 203: First spring component; 204: Slide rail; 205: Pressure plate; 206: Drilling head; 207: First connecting rod; 208: Second connecting rod; 300: Recessed platform; 301: Round hole; 302: Top plate; 303: Second spring component; 304: Button; 305: Top block; 306: Third spring component. Detailed Implementation

[0023] The following is a detailed explanation with reference to the accompanying drawings.

[0024] Example 1

[0025] This invention provides a perforation tool for testing samples for thin-film water vapor transmission rate, such as... Figure 1 As shown, the device includes a main body 100 serving as a punching carrier. The main body 100 is provided with a punching assembly 200 for punching test samples and a recessed platform 300 for placing test samples. The punching assembly 200 includes a handle 201 and a support base 202 for supporting the handle 201. The handle 201 and the support base 202 are connected by a first spring 203, and the support base 202 has a slide rail 204 that engages with one end of the handle 201. The first spring 203 is disposed within the slide rail 204. A pressure plate 205 and at least two punching heads 206 are also provided at the end of the handle 201 away from the support base 202. The pressure plate 205 has holes for the at least two punching heads 206 to pass through. This invention integrates the punching component 200 and the platform 300 into a single unit by setting the main body 100 as a unified punching carrier. This solves the problem of separate operation of the pressure plate and handle-type punch in the prior art, simplifies the operator's process, and reduces operational complexity. The handle 201 and the support base 202 cooperate through the first spring 203 and the slide 204 to achieve stable vertical movement of the handle, replacing the existing tool's operation method of manually aligning and pressing the position, and avoiding sample deformation caused by uneven force or human error. At the same time, the coordinated design of the pressure plate 205 pressing the sample first and the punching head 206 punching the hole effectively prevents the sample from slipping during the punching process, solving the problem of "circular hole position offset" in the prior art, ensuring that the sample can be orderly and tightly attached to the test chamber afterward, and ensuring the accuracy of the water vapor transmission rate test results.

[0026] According to a preferred embodiment, such as Figure 2 As shown, a support base 202 is mounted on the main body 100, and the support base 202 is hollow to form a space for accommodating the first spring member 203 and the slide rail 204. One end of the first spring member 203 is connected to the lower vertical end of the hollow interior of the support base 202. The other end of the first spring member 203 is connected to the end of the handle 201 located inside the support base 202. The hollow design of the support base 202 can accommodate the first spring member 203 and the slide rail 204. On the one hand, it can protect the internal parts, avoid damage to the parts caused by external impacts, and extend the service life of the tool; on the other hand, through the structure that "the two ends of the first spring member are respectively fixed to the lower hollow end of the support base and the handle", it ensures the stability of the spring return, avoids the handle pressing deviation caused by spring offset, further improves the accuracy of the vertical movement of the handle, and reduces the drilling position error caused by spring instability.

[0027] According to a preferred embodiment, the slide 204 extends vertically on the side of the support base 202 near the handle 201, and engages one end of the handle 201 within the hollow interior of the support base 202. The vertical extension of the slide 204 and its engagement of the handle 201 strictly restricts the direction of handle movement, allowing only vertical up-and-down movement. This eliminates the lateral wobbling or offset that may occur with the handle in existing operations, ensuring the positioning accuracy of the punch head 206 from the movement trajectory and preventing misalignment of the circular hole due to handle offset. The engaging structure keeps the handle stable within the support base 202, preventing loosening or wobbling. This ensures that the pressure applied by the operator is evenly transmitted to the punch head, reducing excessive localized stress on the sample due to handle wobbling, thereby preventing sample deformation and ensuring the integrity of the sample's shape.

[0028] According to a preferred embodiment, the pressure plate 205 is circular, and at least two punch heads 206 are correspondingly arranged on the diameter of the pressure plate 205 and symmetrically centered on the center of the pressure plate 205. The circular shape of the pressure plate 205 matches the circular structure of the "50cm² circular sample" and the sinking platform 300 required by traditional equipment, enabling comprehensive and uniform sample compression and preventing sample slippage in uncompressed areas. Compared to existing rectangular or mismatched pressure plates, the compression reliability is significantly improved. The at least two punch heads 206 are symmetrically distributed along the diameter of the pressure plate (centered on the center of the circle), precisely matching the equipment requirement of "5mm holes at both ends of the sample diameter direction," eliminating the need for subsequent hole adjustments. This solves the problem of "asymmetrical hole positions and failure to meet equipment installation requirements" that may occur with existing tools, ensuring that the sample can smoothly pass through the plastic column and embed into the test chamber wall after drilling, guaranteeing the sealing effect of the test chamber and avoiding the impact of hole position deviation on the test results.

[0029] According to a preferred embodiment, the punch head 206 is configured as a cylindrical punch. The punch head 206 is detachably connected to the handle 201. The cylindrical punch design of the punch head 206, compared to existing dulled handle-type hole openers, makes punching faster and less labor-intensive, reducing the problem of sample deformation caused by excessive force applied by the operator, and ensuring sample morphology while reducing operational intensity. The detachable connection between the punch head and the handle 201 means that when the punch becomes dull due to long-term use, only the punch needs to be replaced, without replacing the entire punching assembly or tool. This significantly reduces usage costs, extends the overall service life of the tool, and solves the resource waste problem of existing tools needing to be scrapped after becoming dull.

[0030] According to a preferred embodiment, such as Figure 5As shown, the pressure plate 205 is connected to the handle 201 via a first connecting rod 207 and a second connecting rod 208. The first connecting rod 207 and the second connecting rod 208 are hollow. The first connecting rod 207 is nested within the second connecting rod 208, and a spring is installed between the first connecting rod 207 and the second connecting rod 208. The first connecting rod 207 nested within the second connecting rod 208 with the spring in between forms a retractable buffer structure: when the handle is pressed, the pressure plate 205 first contacts the sample and applies stable pressure under the spring force. After the pressure plate fully presses the sample, the drilling head 206 continues to descend and drill, avoiding localized deformation caused by the drilling head contacting the sample first, thus achieving an orderly connection between the "pressing-drilling" actions. The buffering effect of the spring ensures that the pressure plate exerts uniform and controllable pressure on the sample, preventing sudden pressure increases and further preventing wrinkles or deformation of the sample due to uneven pressure. Compared to the existing design where the pressure plate and drilling head move synchronously, sample integrity is more easily guaranteed.

[0031] According to a preferred embodiment, the pressure plate 205 is fixedly connected to the first connecting rod 207. The second connecting rod 208 is fixedly connected to the handle 201. The two ends of a spring between the first connecting rod 207 and the second connecting rod 208 are respectively connected to the pressure plate 205 and the handle 201. This invention ensures no looseness between the connecting rod and the pressure plate / handle, avoiding "pressure plate offset and drilling head misalignment" caused by connection gaps, and guarantees the relative positional accuracy of the pressure plate and the drilling head from a structural connection perspective. The spring's two ends are respectively connected to the pressure plate 205 and the handle 201, allowing the spring's elastic force to be accurately transmitted to the pressure plate, ensuring stable and continuous pressure on the sample, preventing uneven pressure due to spring connection position deviations, further improving pressing reliability, and preventing sample movement during drilling.

[0032] According to a preferred embodiment, the countersink 300 is disposed on the main body 100 corresponding to the pressure plate 205, and the countersink 300 extends into the main body 100. Circular holes 301, which mate with the punching head 206, are provided at both ends of the countersink 300 in the diametrical direction. The circular holes 301 penetrate the main body 100. The countersink 300, corresponding to the pressure plate 205 and extending into the main body 100, can accurately position circular samples, guiding operators to quickly and accurately place the samples in the designated positions, avoiding the placement offset caused by the lack of a positioning reference in existing tools, thus ensuring the accuracy of the punching position from the source. The circular holes 301 at both ends of the countersink in the diametrical direction mate with the punching head 206 and penetrate the main body, providing downward space for the punching head and preventing sample breakage due to obstruction at the bottom of the punch; on the other hand, waste material (small film discs) generated during punching can be discharged through the circular holes without additional cleaning of the countersink, improving operational efficiency, and preventing waste residue from affecting subsequent punching.

[0033] According to a preferred embodiment, a top plate 302 is further provided on the sinking platform 300. The top plate 302 is embedded in the main body 100 and the sinking platform 300. The main body 100 is hollow, and a second spring member 303 is provided between the top plate 302 and the main body 100. The top plate 302 is provided in a way that it is ejected from the plane of the sinking platform 300. After the film sheet is perforated, the top plate 302 can eject the perforated film sheet. The top plate 302 on the sinking platform 300 and the second spring member 303 between it and the main body solve the problem in the prior art that "after perforation, the sample is easily stuck under the sinking platform or pressure plate, and it is necessary to forcefully pry it out, resulting in sample deformation": after perforation, the top plate ejects the sample under the action of the spring force, making it convenient and effortless to remove, and without damaging the sample edges or holes, thus ensuring the integrity of the sample.

[0034] According to a preferred embodiment, such as Figure 3 and Figure 4 As shown, the main body 100 is provided with a button 304 for limiting the ejection of the top plate 302. The vertically downward end of the button 304 is inclined. A top block 305 that engages with the top plate 302 is also provided within the main body 100. A groove is provided on the top plate 302. One end of the top block 305 abuts against the groove. A third spring member 306 is connected to the end of the top block 305 away from the top plate 302. The vertically downward end of the button 304 abuts against the middle of the top block 305 and is inclined towards the top plate 302. An inclined groove is provided at the middle of the top block 305. As the button 304 is pressed down, since the button 304 is mounted on the main body 300 and moves vertically, the downward pressure of the inclined vertically downward end of the button 304 causes the top block 305, which is in contact with this end face, to move in the opposite direction of the inclined direction. In other words, as button 304 is pressed down, top block 305 moves away from top piece 302 under pressure, gradually leaving the groove. This causes top piece 302 to eject the diaphragm under the elastic action of the second spring 303. After the diaphragm is ejected, the operator can press down on top piece 302, causing the groove to realign with top block 305. Top block 305 then enters the groove under the action of the third spring 306, and the end face of top block 305 in contact with button 304 moves, causing button 304 to be ejected. Button 304 prevents top piece 302 from ejecting the diaphragm before drilling is completed. When button 304 is not pressed, top block 305 remains within the groove of top piece 302, ensuring that top piece 302 will not eject the diaphragm even under the elastic action of the second spring 303, thus maintaining the flatness of the diaphragm within the countersunk platform 300 before drilling.

[0035] This invention achieves controllable ejection of the top plate 302 through the cooperation of button 304, top block 305, and third spring 306. When button 304 is not pressed, top block 305 is engaged in the groove of top plate 302, preventing the top plate 302 from being accidentally ejected under the action of the second spring 303. This ensures that the sample remains flat in the sink before drilling, avoiding sample displacement or deformation caused by erroneous action of top plate 302, thus solving the problem of "unstable sample position during drilling". After pressing the button, the tilting structure drives top block 305 away from top plate 302, and top plate 302 automatically ejects the sample. After ejection, top plate 302 can be reset by pressing down, allowing top block 305 to re-engage in the groove and button 304 to spring back, enabling tool reuse, smooth and convenient operation, and improving overall work efficiency. At the same time, this control mechanism ensures that the sample is in a flat state before each drilling, further guaranteeing hole position accuracy and sample integrity, ultimately improving the accuracy of water vapor transmission rate detection results.

[0036] It should be noted that the engagement and positioning of the groove and the top block 305 ensures that the vertical upper end of the top piece 302 is relatively flat with the plane of the recessed platform 300, thus keeping the sample flat within the recessed platform 300. Understandably, since the top piece 302 only occupies a portion of the plane of the recessed platform 300, even if the plane of the recessed platform 300 becomes uneven due to prolonged use of the top piece 302, it will not affect the integrity of the sample or the drilling process.

[0037] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection scope. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. This utility model specification contains multiple inventive concepts; phrases such as "preferred" or "according to a preferred embodiment" indicate that the corresponding paragraph discloses an independent concept. The applicant reserves the right to file divisional applications based on each inventive concept. Throughout the text, the feature introduced by "preferred" is only an optional mode and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A punching tool for testing samples for water vapor transmission through thin films, characterized in that, The system includes a main body (100) serving as a punching carrier, on which a punching assembly (200) for punching test samples and a settling platform (300) for placing test samples are provided. The punching assembly (200) includes a handle (201) and a support base (202) for supporting the handle (201). The handle (201) and the support base (202) are connected by a first spring (203). The support base (202) is provided with a slide (204) that fits into one end of the handle (201). The first spring (203) is disposed in the slide (204). The end of the handle (201) away from the support base (202) is also provided with a pressure plate (205) and at least two punching heads (206). The pressure plate (205) is provided with holes for at least two punching heads (206) to pass through.

2. The perforation tool for testing samples for thin-film water vapor transmission as described in claim 1, characterized in that, The support base (202) is disposed on the main body (100), and the support base (202) is hollow to form a space for accommodating the first spring member (203) and the slide rail (204), wherein, One end of the first spring (203) is connected to the vertically downward end of the hollow interior of the support (202), and the other end of the first spring (203) is connected to the end of the handle (201) located inside the support (202).

3. The perforation tool for testing water vapor transmission rate of thin films according to claim 2, characterized in that, The slide (204) extends vertically on the side of the support (202) near the handle (201) and engages one end of the handle (201) inside the hollow interior of the support (202).

4. The perforation tool for testing water vapor transmission rate of thin films according to claim 3, characterized in that, The pressure plate (205) is circular, and at least two of the punch heads (206) are correspondingly arranged on the diameter of the pressure plate (205) and symmetrical about the center of the circle of the pressure plate (205).

5. The perforation tool for testing water vapor transmission rate of thin films according to claim 4, characterized in that, The punch head (206) is configured as a cylindrical punch, and the punch head (206) is detachably connected to the handle (201).

6. The perforation tool for testing water vapor transmission rate of thin films according to claim 5, characterized in that, The pressure plate (205) is connected to the handle (201) via a first connecting rod (207) and a second connecting rod (208). The first connecting rod (207) and the second connecting rod (208) are hollow, with the first connecting rod (207) nested in the second connecting rod (208), and a spring is provided between the first connecting rod (207) and the second connecting rod (208).

7. The perforation tool for testing samples for thin-film water vapor transmission as described in claim 6, characterized in that, The pressure plate (205) is fixedly connected to the first connecting rod (207), the second connecting rod (208) is fixedly connected to the handle (201), and the spring is connected to the pressure plate (205) and the arm (201) at both ends between the first connecting rod (207) and the second connecting rod (208).

8. The perforation tool for testing water vapor transmission rate of thin films according to claim 7, characterized in that, The recessed platform (300) is disposed on the main body (100) corresponding to the pressure plate (205), and the recessed platform (300) is disposed to extend into the main body (100). The two ends of the recessed platform (300) in the diametrical direction are provided with round holes (301) that cooperate with the punching head (206), and the round holes (301) penetrate the main body (100).

9. The perforation tool for testing water vapor transmission rate of thin films according to claim 8, characterized in that, A top plate (302) is also provided on the recessed platform (300), and the top plate (302) is embedded in the main body (100) and the recessed platform (300), wherein, The main body (100) is hollow inside, and a second spring (303) is provided between the top piece (302) and the main body (100). The top piece (302) is provided in such a way that it is pushed out from the plane of the sink (300).

10. The perforation tool for testing water vapor transmission rate of thin films according to claim 9, characterized in that, The main body (100) is provided with a button (304) for limiting the ejection of the top piece (302), wherein the lower vertical end of the button (304) is inclined. The main body (100) is also provided with a top block (305) that engages with the top piece (302). The top piece (302) has a groove. One end of the top block (305) abuts against the groove. The end of the top block (305) away from the top piece (302) is connected to a third spring (306). The vertical lower end of the button (304) abuts against the middle of the top block (305) and is inclined toward the top piece (302). The middle of the top block (305) has an inclined groove.

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