Novel composite material thermal bonding test method and device

Abstract

The invention discloses a novel composite material thermal bonding test method and device, the device comprises a vacuum nitrogen charging clock control type heating box and a detachable portable hot pressing plate, the detachable portable hot pressing plate comprises an upper pressing plate and a lower pressing plate, the bottom of the upper pressing plate is provided with an upper boss, and the bottom of the lower pressing plate is provided with a lower boss; according to the invention, the influence of oxygen, moisture, instant temperature difference and the like on the EAA welding process is effectively eliminated, the accuracy of a test result is ensured, multiple samples can be tested at the same time, the working efficiency is improved, the resource consumption and related waste are reduced, and the test equipment cost and the space resource occupation of a test room are reduced; the four-point self-locking device reasonably and effectively controls the timely tracking and adjustment of the pressure of the EAA hot melt adhesive during hot melting in a low-pressure area, eliminates the defect that the conventional equipment still keeps the constant pressure or has no pressure tracking during the hot-pressing process melting period, and controls the waste gas to escape and fill the experiment space in the test process. The harm of waste gas to a human body is controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of novel composite materials, and in particular relates to a novel composite material thermal bonding test method and device. Background Art

[0002] New composite materials mainly refer to double-sided composite copper foil, composite aluminum foil, copper-aluminum composite strip (plate) materials with a "sandwich" structure, or single-sided composites of the above corresponding materials. Composite materials have been promoted and developed due to their advantages such as excellent comprehensive performance, low price and cost, and wide application scenarios. The prerequisite for achieving the performance of composite materials is to meet the performance indicators of various materials, and the detection and identification of performance indicators becomes the key. The composite strength test of the composite layer interface of the composite material is limited by the structure of the material itself. When testing the composite strength of the coating, the cross-cutting method and the pull-off method are often used.

[0003] Existing heat sealing often uses equipment such as fluidity test presses. This type of equipment is easy to use, fast, and easy to purchase, but it still has the following problems: high price, large energy consumption caused by large heat loss, constant pressure during the hot welding process, adverse effects on the welding process, inability to prevent or reduce the oxidation and carbonization caused by the contact of EAA with oxygen during the hot welding process; waste gas generated during the hot melting process fills the experimental space, causing harm to the human body and equipment, and cannot achieve good step-by-step temperature control, and the number of test samples is single. For this reason, we propose a new composite material thermal bonding test method and device to solve the problems existing in the existing technology. Summary of the invention

[0004] The purpose of the present invention is to provide a novel composite material thermal bonding test method and device, aiming to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A novel composite material thermal bonding test method comprises the following steps:

[0007] Step 1: Place the hot pressing sample evenly on the top of the lower pressing plate, and then press the upper pressing plate symmetrically on the lower pressing plate. At this time, the upper boss needs to be aligned with the lower boss;

[0008] Step 2: Place the sleeve on the top of the first through hole, then insert the bottom end of the pin rod through the sleeve and the first through hole in sequence and thread the bottom end of the pin rod into the inside of the threaded hole. After tightening the pin rod, the upper and lower pressing plates can be compacted.

[0009] Step 3: According to the number of compacted portable detachable hot pressing plates, move the corresponding number of supporting plates downward and position them; first pull the pull block to drive the insertion rod to move until the end of the insertion rod is separated from the limit block, at which time the reset spring is in a stretched state, and then move the supporting plate downward to a suitable position. When the end of the insertion rod is aligned with the second through hole at the corresponding position, release the pull block at this time, and use the return force of the reset spring to drive the end of the insertion rod to be firmly inserted into the inside of the third through hole, so as to achieve the effect of positioning the supporting plate;

[0010] Step 4: Then place the compacted detachable portable hot pressing plate on the support plate, and start testing the sample through the vacuum nitrogen-filled clock-controlled heating box. The vacuum nitrogen-filled clock-controlled heating box has clock control and temperature control functions, and can be filled with nitrogen and vacuumed. The number of support plates can be adjusted according to actual needs, with a maximum of three layers.

[0011] A novel composite material thermal bonding test device comprises a vacuum nitrogen-filled clock-controlled heating box and a detachable portable hot pressing plate, wherein the detachable portable hot pressing plate comprises an upper pressing plate and a lower pressing plate, wherein an upper boss is arranged at the bottom of the upper pressing plate, and a lower boss is arranged at the top of the lower pressing plate, and low-pressure self-adjustable closed four-point clamping components are arranged on the upper pressing plate and the lower pressing plate, and three groups of supporting plates are arranged inside the vacuum nitrogen-filled clock-controlled heating box, and limiting plates are fixedly connected to the inner walls on both sides of the vacuum nitrogen-filled clock-controlled heating box, and the two sides of the supporting plate are slidably connected to the limiting plates, and locking components for positioning the supporting plate are arranged on the side walls on both sides of the supporting plate.

[0012] Preferably, the low-pressure self-adjustable closed four-point clamping assembly includes a sleeve, which is arranged on the top of the upper pressure plate, a pin rod is inserted into the interior of the sleeve, a telescopic spring is movably sleeved on the outer wall of the pin rod, and the telescopic spring is arranged in the inner cavity of the sleeve.

[0013] Preferably, a first through hole matched with the pin rod is opened on the top of the upper pressing plate, and the bottom end of the pin rod passes through the first through hole.

[0014] Preferably, a threaded hole is provided on the top of the lower pressure plate, an external thread matching the threaded hole is provided on the outer wall of the pin rod, and the bottom end of the pin rod is threadedly connected to the inside of the threaded hole.

[0015] Preferably, a limiting groove is provided on one side wall of the limiting plate, and limiting blocks adapted to the limiting groove are fixedly connected to both side walls of the supporting plate, respectively, and the limiting blocks are slidably connected to the inside of the limiting groove.

[0016] Preferably, the locking assembly includes a fixed block, which is fixedly connected to a side wall of the supporting plate, and an insertion rod is slidably inserted into the interior of the fixed block, one end of the insertion rod passes through the limiting plate and is inserted into the interior of the limiting block, and the other end of the insertion rod is fixedly connected to a pull block.

[0017] Preferably, it further comprises a return spring, one end of which is fixedly connected to a side wall of the pull block, the other end of which is fixedly connected to one side of the fixed block, and the return spring is movably sleeved on the outer wall of the insertion rod.

[0018] Preferably, a plurality of groups of second through holes are formed on one side wall of the limiting plate, a third through hole is formed on one side wall of the limiting block, and one end of the insertion rod passes through one group of the second through holes and is inserted into the inside of the third through hole.

[0019] Preferably, two sets of guide rails are fixedly connected to the inner walls on both sides of the vacuum nitrogen-filled clock-controlled heating box, and the two sides of the support plate are slidably connected to the guide rails.

[0020] Technical effects and advantages of the present invention: Compared with the prior art, the present invention provides a novel composite material thermal bonding test method and device, which has the following advantages:

[0021] 1. The present invention effectively eliminates the influence of oxygen, moisture, instantaneous temperature difference, etc. on the EAA welding process, ensures the accuracy of the test results, can test multiple samples at the same time, improves work efficiency, reduces resource consumption and related waste, reduces the cost of test equipment and laboratory space resource occupancy. In addition, the four-point self-locking device reasonably and effectively controls the pressure of the EAA hot melt adhesive during hot welding in the low-pressure area, timely tracks and adjusts it, eliminates the shortcomings of conventional equipment that maintains a constant pressure or has no pressure tracking during the welding period of the hot pressing process, and controls the exhaust gas escape and filling in the experimental space during the test, thereby controlling the harm of the exhaust gas to the human body.

[0022] 2. The present invention arranges a limit plate inside the vacuum nitrogen-filled clock-controlled heating box, and cooperates with the support plate and the locking assembly to facilitate the up and down movement of the support plate inside the vacuum nitrogen-filled clock-controlled heating box. The support plate can be moved and adjusted according to the actual number of samples prepared. The unused support plates can be uniformly placed at the inner bottom of the vacuum nitrogen-filled clock-controlled heating box, which is conducive to further improving the flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure inside the vacuum nitrogen-filled clock-controlled heating box of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the supporting plate, the limiting plate and the locking assembly of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the low-pressure self-adjustable closed four-point clamping assembly of the present invention.

[0027] In the figure: 1. Vacuum nitrogen-filled clock-controlled heating box; 2. Removable portable hot pressing plate; 201. Upper pressing plate; 202. Lower pressing plate; 203. Upper boss; 204. Lower boss; 3. Low-pressure self-adjustable closed four-point clamping assembly; 301. Sleeve; 302. Pin rod; 303. Telescopic spring; 4. Support plate; 5. Limit plate; 601. Fixed block; 602. Insert rod; 603. Pull block; 604. Reset spring; 7. First through hole; 8. Threaded hole; 9. External thread; 10. Limit groove; 11. Limit block; 12. Second through hole; 13. Guide rail. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention provides Figure 1-4 A novel composite material thermal bonding test method is shown, comprising the following steps:

[0030] Step 1: Place the hot pressing sample evenly on the top of the lower pressing plate 202, and then press the upper pressing plate 201 symmetrically on the lower pressing plate 202. At this time, the upper boss 203 needs to be aligned with the lower boss 204;

[0031] Step 2: Place the sleeve 301 on the top of the first through hole 7, then insert the bottom end of the pin rod 302 through the sleeve 301 and the first through hole 7 in sequence and thread the bottom end of the pin rod 302 into the inside of the threaded hole 8. After tightening the pin rod 302, the upper pressing plate 201 and the lower pressing plate 202 can be compacted;

[0032] Step 3: According to the number of compacted portable detachable hot pressing plates 2, the corresponding number of support plates 4 are moved downward and positioned; first pull the pull block 603 to drive the insertion rod 602 to move until the end of the insertion rod 602 is separated from the limit block 11, at which time the return spring 604 is in a stretched state, and then move the support plate 4 downward to a suitable position. When the end of the insertion rod 602 is aligned with the second through hole 12 at the corresponding position, release the pull block 603 at this time, and use the return force of the return spring 604 to drive the end of the insertion rod 602 to be firmly inserted into the inside of the third through hole, so as to achieve the effect of positioning the support plate 4;

[0033] Step 4: Then place the compacted detachable portable hot pressing plate 2 on the supporting plate 4, and start testing the sample through the vacuum nitrogen-filled clock-controlled heating box 1. The vacuum nitrogen-filled clock-controlled heating box 1 has clock control and temperature control functions, and can be filled with nitrogen and vacuumed. The supporting plate 4 can adjust the configuration quantity according to actual needs, with a maximum of three layers.

[0034] A novel composite material thermal bonding test device comprises a vacuum nitrogen-filled clock-controlled heating box 1 and a detachable portable hot pressing plate 2. The vacuum nitrogen-filled clock-controlled heating box 1 can realize nitrogen-filled vacuum protection heating of EAA hot melt adhesive, ensuring that the EAA hot melt adhesive welding process is not oxidized or carbonized; at least two samples can be tested simultaneously; a step-by-step temperature clock control of heating → maintaining → cooling can be realized, which can avoid a series of problems such as uneven thermal expansion and thermal damage caused by the direct contact or separation of the sample from the heat source caused by the conventional fluidity test press; the detachable portable hot pressing plate 2 can realize the loading of samples outside the heating chamber, and multiple samples can be tested simultaneously; the retracted boss structure can ensure that the temperature required for the test is uniform, mild and timely transmitted;

[0035] The detachable portable hot pressing plate 2 includes an upper pressing plate 201 and a lower pressing plate 202. An upper boss 203 is provided at the bottom of the upper pressing plate 201, and a lower boss 204 is provided at the top of the lower pressing plate 202. The upper boss 203 and the lower boss 204 ensure that the sample is hot pressed without wrinkles, hollow, flat and compact, and that the heat is evenly and timely conducted during the hot pressing process; the hot melting space is protected by nitrogen filling to ensure that the hot melting process is not disturbed by oxidation. The upper pressing plate 201 and the lower pressing plate 202 are made of stainless steel plates. The upper and lower pressing plates are portable and detachable. The upper pressing plate 201 and the lower pressing plate 202 are provided with a low-pressure self-adjustable closed four-point clamping component 3. The low-pressure self-adjustable closed four-point clamping component 3 can realize flexible and free adjustment of the locking pressure and keep it in the low-pressure zone to avoid squeezing damage to the test material due to excessive pressure. The free adjustment of the locking pressure realizes the instant tracking and adjustment of the closing height change caused by hot melting during the hot melting process;

[0036] Three groups of supporting plates 4 are arranged inside the vacuum nitrogen filling clock-controlled heating box 1. The inner walls on both sides of the vacuum nitrogen filling clock-controlled heating box 1 are respectively fixedly connected with limit plates 5. The two sides of the supporting plate 4 are respectively slidably connected with the limit plates 5. The side walls on both sides of the supporting plate 4 are respectively provided with locking components for positioning the supporting plate 4. The present invention greatly improves the feasibility, stability, safety, low cost, fast and convenient, and simultaneous testing of multiple samples of heat sealing operations.

[0037] The low-pressure self-adjustable closed four-point clamping assembly 3 includes a sleeve 301, which is arranged on the top of the upper pressing plate 201. A pin rod 302 is inserted into the sleeve 301. A telescopic spring 303 is movably sleeved on the outer wall of the pin rod 302, and the telescopic spring 303 is arranged in the inner cavity of the sleeve 301. The order of preparing the hot pressing sample is 100μmPET film+EAA+(non-test surface) composite material (test surface)+EAA+(test surface) composite material (non-test surface)+EAA+100μmPET film. After preparing the sample according to the A4 size area, it is cut into the required size, and the test clamping area is reserved for non-stickiness;

[0038] A first through hole 7 matched with the pin rod 302 is provided at the top of the upper pressing plate 201, and the bottom end of the pin rod 302 passes through the first through hole 7. A threaded hole 8 is provided at the top of the lower pressing plate 202, and an external thread 9 matched with the threaded hole 8 is provided on the outer wall of the pin rod 302. The bottom end of the pin rod 302 is threadedly connected to the inside of the threaded hole 8. The sleeve 301 is placed on the top of the first through hole 7, and then the bottom end of the pin rod 302 passes through the sleeve 301 and the first through hole 7 in sequence, and the bottom end of the pin rod 302 is threadedly connected to the inside of the threaded hole 8. After tightening the pin rod 302, the upper pressing plate 201 and the lower pressing plate 202 can be compacted.

[0039] A limiting groove 10 is provided on one side wall of the limiting plate 5, and limiting blocks 11 adapted to the limiting groove 10 are fixedly connected to the side walls of the supporting plate 4, respectively. The limiting blocks 11 are slidably connected to the inside of the limiting groove 10. By setting the limiting groove 10 and the limiting blocks 11 in coordination, the supporting plate 4 is limited.

[0040] The locking assembly includes a fixed block 601, which is fixedly connected to a side wall of the supporting plate 4, and a plug rod 602 is slidably inserted inside the fixed block 601. One end of the plug rod 602 passes through the limit plate 5 and is inserted into the inside of the limit block 11. The other end of the plug rod 602 is fixedly connected to a pull block 603, and also includes a return spring 604, one end of the return spring 604 is fixedly connected to a side wall of the pull block 603, and the other end of the return spring 604 is fixedly connected to one side of the fixed block 601, and the return spring 604 is movable. The pull block 603 is arranged on the outer wall of the insertion rod 602. The insertion rod 602 can be driven to move by pulling the pull block 603 first, until the end of the insertion rod 602 is separated from the limit block 11. At this time, the return spring 604 is in a stretched state, and then the support plate 4 is moved downward to a suitable position. When the end of the insertion rod 602 is aligned with the second through hole 12 at the corresponding position, the pull block 603 is released at this time, and the return force of the return spring 604 can be used to drive the end of the insertion rod 602 to be firmly inserted into the inside of the third through hole, so as to achieve the effect of positioning the support plate 4.

[0041] A plurality of groups of second through holes 12 are provided on the side wall of one side of the limiting plate 5, a third through hole is provided on the side wall of one side of the limiting block 11, one end of the insertion rod 602 passes through one group of the second through holes 12 and is inserted into the inside of the third through hole, two groups of guide rails 13 are fixedly connected to the inner walls on both sides of the vacuum nitrogen-filled clock-controlled heating box 1, and the two sides of the supporting plate 4 are slidably connected to the guide rails 13 respectively. By setting the guide rails 13, the supporting plate 4 is limited, making it more stable during movement, which is beneficial to further improve the stability of the device.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel composite material thermal bonding test method, characterized in that: The following steps are involved: Step 1: Place the hot pressing sample evenly on the top of the lower pressing plate (202), and then press the upper pressing plate (201) symmetrically on the lower pressing plate (202). At this time, the upper boss (203) and the lower boss (204) need to be aligned; Step 2: Place the sleeve (301) on the top of the first through hole (7), then pass the bottom end of the pin rod (302) through the sleeve (301) and the first through hole (7) in sequence, and thread the bottom end of the pin rod (302) into the inside of the threaded hole (8). After tightening the pin rod (302), the upper pressing plate (201) and the lower pressing plate (202) can be compacted; Step 3: According to the number of compacted portable detachable hot pressing plates (2), a corresponding number of supporting plates (4) are moved downward and positioned; first pull the pull block (603) to drive the insertion rod (602) to move until the end of the insertion rod (602) is separated from the limit block (11), at which time the return spring (604) is in a stretched state, and then the supporting plate (4) is moved downward to a suitable position. When the end of the insertion rod (602) is aligned with the second through hole (12) at the corresponding position, release the pull block (603) at this time, and use the return force of the return spring (604) to drive the end of the insertion rod (602) to be firmly inserted into the inside of the third through hole, thereby achieving the effect of positioning the supporting plate (4); Step 4: The compacted detachable portable hot pressing plate (2) is then placed on a support plate (4), and the sample is tested using a vacuum nitrogen-filled clock-controlled heating box (1). The vacuum nitrogen-filled clock-controlled heating box (1) has clock control and temperature control functions, and can be filled with nitrogen and vacuumized. The number of support plates (4) can be adjusted according to actual needs, with a maximum of three layers.

2. A novel composite material thermal bonding test device, comprising a vacuum nitrogen-filled clock-controlled heating box (1) and a detachable portable hot pressing plate (2), characterized in that: The detachable portable hot pressing plate (2) comprises an upper pressing plate (201) and a lower pressing plate (202), the bottom of the upper pressing plate (201) is provided with an upper boss (203), the top of the lower pressing plate (202) is provided with a lower boss (204), the upper pressing plate (201) and the lower pressing plate (202) are provided with a low-pressure self-adjustable closed four-point clamping assembly (3), the interior of the vacuum nitrogen-filled clock-controlled heating box (1) is provided with three groups of supporting plates (4), the inner walls on both sides of the vacuum nitrogen-filled clock-controlled heating box (1) are respectively fixedly connected with limiting plates (5), the two sides of the supporting plate (4) are respectively slidably connected with the limiting plates (5), and the side walls on both sides of the supporting plate (4) are respectively provided with locking assemblies for positioning it.

3. A novel composite material thermal bonding test device according to claim 2, characterized in that: The low-pressure self-adjustable closed four-point clamping assembly (3) comprises a sleeve (301), wherein the sleeve (301) is arranged on the top of the upper pressure plate (201), a pin rod (302) is inserted into the interior of the sleeve (301), a telescopic spring (303) is movably sleeved on the outer wall of the pin rod (302), and the telescopic spring (303) is arranged in the inner cavity of the sleeve (301).

4. A novel composite material thermal bonding test device according to claim 3, characterized in that: A first through hole (7) adapted to the pin rod (302) is provided at the top of the upper pressing plate (201), and the bottom end of the pin rod (302) passes through the first through hole (7).

5. A novel composite material thermal bonding test device according to claim 4, characterized in that: A threaded hole (8) is provided on the top of the lower pressure plate (202), an external thread (9) matching the threaded hole (8) is provided on the outer wall of the pin rod (302), and the bottom end of the pin rod (302) is threadedly connected to the inside of the threaded hole (8).

6. A novel composite material thermal bonding test device according to claim 2, characterized in that: A limiting groove (10) is provided on one side wall of the limiting plate (5), and limiting blocks (11) adapted to the limiting groove (10) are fixedly connected to both side walls of the supporting plate (4), respectively, and the limiting blocks (11) are slidably connected to the inside of the limiting groove (10).

7. A novel composite material thermal bonding test device according to claim 6, characterized in that: The locking assembly comprises a fixed block (601), wherein the fixed block (601) is fixedly connected to a side wall of a supporting plate (4), an insertion rod (602) is slidably inserted inside the fixed block (601), one end of the insertion rod (602) passes through the limiting plate (5) and is inserted into the inside of the limiting block (11), and the other end of the insertion rod (602) is fixedly connected to a pulling block (603).

8. A novel composite material thermal bonding test device according to claim 7, characterized in that: It also includes a return spring (604), one end of which is fixedly connected to a side wall of the pull block (603), the other end of which is fixedly connected to one side of the fixed block (601), and the return spring (604) is movably sleeved on the outer wall of the insertion rod (602).

9. A novel composite material thermal bonding test device according to claim 8, characterized in that: A plurality of groups of second through holes (12) are provided on one side wall of the limiting plate (5), a third through hole is provided on one side wall of the limiting block (11), and one end of the insertion rod (602) passes through one group of the second through holes (12) and is inserted into the interior of the third through hole.

10. A novel composite material thermal bonding test device according to claim 2, characterized in that: Two sets of guide rails (13) are fixedly connected to the inner walls on both sides of the vacuum nitrogen-filled clock-controlled heating box (1), and the two sides of the support plate (4) are slidably connected to the guide rails (13).

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