Building sound insulation material adopting high-barrier film and preparation method of building sound insulation material

Abstract

The invention discloses a building sound insulation material adopting a high-barrier film and a preparation method of the building sound insulation material, and relates to the field of sound insulation materials, and the building sound insulation material is formed by gluing PVC rubber, the high-barrier film and felt layer by layer. The grooves are formed in the surface of the PVC rubber sheet, the grooves are sealed through the high-barrier film to form the first-stage sound absorption structure, then the first-stage sound absorption structure and the cavity in the PVC rubber sheet are connected through the connecting holes to form the second-stage sound absorption structure, resonance sound absorption is achieved through the two communicated sound absorption structures, and the sound insulation performance of the high-barrier film and the felt is matched; the noise reduction performance of the sound insulation cotton sheet can be greatly improved in the mode of combining sound absorption and sound insulation, uniform connecting holes can be horizontally formed in the side wall of a flat and narrow groove through the grooving and punching mechanism, waste can be effectively brought out in the punching process, the possibility that the connecting holes are blocked by waste residues is eliminated, and the noise reduction performance of the sound insulation cotton sheet is improved. And the function of the two-stage sound absorption structure is effectively exerted through high-quality trepanning operation.

Description

Technical Field

[0001] The present invention relates to the field of sound insulation materials, and particularly to a building sound insulation material using a high-barrier film and a preparation method thereof. Background Art

[0002] The existing building sound insulation cotton sheet is composed of three layers: a solid PVC rubber sheet, a felt material, and a coating film. It mainly reduces noise through the sound absorption of the felt material and the sound insulation of the PVC rubber sheet. However, since the PVC rubber sheet is thin and solid, it can conduct sound wave vibration in a solid phase, and the sound insulation effect on noise is weak. When the noise is large or the sound insulation cotton sheet is attached to the noise source, neither the PVC rubber sheet nor the felt material can isolate or absorb the noise, and the noise reduction effect of the sheet is greatly reduced, seriously affecting the application of the sound insulation cotton sheet. High-barrier films are widely used in the processing technology of vacuum insulation panels, which can isolate moisture and gases. However, there is currently no precedent for applying high-barrier films to noise reduction materials, and the noise reduction ability of high-barrier films has not been clearly studied.

[0003] The existing punching devices mostly use rotary drills or punching knife heads to process hole structures. However, both of these processing methods require connecting drive devices, clamping devices, and support devices. When opening holes on the narrow and flat groove walls, it is very difficult for these large-volume punching devices to perform horizontal punching operations. Even if these punching devices are miniaturized, it is difficult to achieve the uniformity of large-scale repeated punching, and it is difficult to guarantee the punching efficiency and quality. In addition, these punching devices mostly perform punching operations on pipes or solid sheets with openings at both ends. The waste generated by punching will not fall into the object or is easily removed. However, when the waste is likely to fall into the enclosed cavity of the object and cannot be removed, these punching devices obviously cannot meet the new punching requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a building sound insulation material using a high-barrier film and a preparation method thereof, to solve the problem of poor noise reduction ability of the sound insulation cotton sheet prepared from the existing solid PVC rubber sheet, and at the same time solve the problem of repeated horizontal punching in flat and narrow grooves.

[0005] To solve the above problems, the present invention provides the following technical solutions:

[0006] A building sound insulation material using a high-barrier film and a preparation method thereof, which is adhesively laminated layer by layer with a PVC rubber sheet, a high-barrier film, and a felt. The high-barrier film is disposed between the PVC rubber sheet and the felt; the high-barrier film is composed of a composite of an outer layer film, a middle layer film, and an inner layer film. The outer layer film is made of nylon or PVC material, the middle layer film is composed of at least one of a VMPET film, a PVDC film, a PVA film, a PP film, and a PVC film, and the inner layer film is made of PE material.

[0007] Preferably, the preparation method of the PVC rubber is: a PVC surface processing device is used to scrape a single side surface of the PVC substrate to form a plurality of grooves, the intersection of the grooves forms a block, a cavity is preset in the block, the PVC surface processing device periodically punches holes on the side walls of the grooves to form connecting holes while scraping, the connecting holes are connected to the cavities, and the PVC surface processing device cuts from the cavity to the groove when punching and takes out the cutting waste.

[0008] Preferably, the PVC surface processing device includes several groups of slotting and punching mechanisms arranged in parallel, the slotting and punching mechanisms include a frame, a horizontal axis is provided on the top of the frame, a rotating frame is rotatably connected to the horizontal axis, a rolling ring is provided on the rotating frame, an annular groove is provided on the inner side of the rolling ring, and several transverse punching components are evenly arranged in the circumferential direction in the annular groove, a vertical rod is vertically fixed under the horizontal axis, a triangular top block is fixed at the lower end of the vertical rod, when the rolling ring rotates, the transverse punching components are ejected by the top block in turn, and are used for cyclically punching holes on the groove side walls on the PVC rubber, and a slotting component is also provided on the horizontal axis, and the slotting component is arranged in front of the rolling ring.

[0009] Preferably, the transverse punching assembly includes a push rod slidably connected to the side wall of the annular groove, a wedge block is provided at the inner end of the push rod, a punching assembly is provided at the outer end of the push rod, a spring is provided between the wedge block and the side wall of the annular groove, and a set of the springs is provided outside the push rod. A through hole is also provided on the side wall of the annular groove. When the wedge block is displaced by the push block, the punching assembly extends outward from the through hole. A plurality of discharge ports are evenly arranged along the circumference of the rolling ring, and the discharge ports are connected to the through hole.

[0010] Preferably, the punching assembly includes a top cone coaxially sleeved on the outer end of the push rod, the front part of the top cone is conical, and the rear part is hollow cylindrical, the rear end circular mouth of the top cone is provided with an annular cutting edge, the rear part of the top cone is slidably connected with a push piece, the push piece is slidably connected to the push rod, a second spring is provided between the push piece and the front part of the top cone, and the second spring is sleeved outside the push rod.

[0011] Preferably, a plurality of blades are provided on the outer wall of the conical portion of the top cone, and the blades are arranged radially with the cone tip as the center.

[0012] Preferably, the slotting assembly comprises a forearm bar arranged on the transverse axis, a scraper is provided at the lower end of the forearm bar, and the scraper is arranged in front of the rolling ring.

[0013] The advantages of the present invention are:

[0014] The present invention forms a primary sound absorption mechanism by opening a groove on the surface of the PVC rubber, and closes the groove with a high-barrier membrane, and then connects the primary sound absorption structure and the cavity in the PVC rubber through a connecting hole to form a secondary sound absorption structure. The two-stage sound absorption structure is connected to resonate and absorb sound, and the sound insulation performance of the high-barrier membrane and the felt itself is matched. The noise reduction performance of the sound insulation cotton sheet can be greatly improved by combining sound absorption and sound insulation.

[0015] The present invention can horizontally open uniform connecting holes on the flat and narrow groove side walls through the slotting and punching mechanism, and can effectively remove waste materials during the hole opening process, eliminating the possibility of waste materials clogging the connecting holes, and effectively exert the function of the two-stage sound absorption structure through high-quality hole opening operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 It is a schematic diagram of the overall structure of the slotting and punching mechanism.

[0017] Figure 3 It is a top view of the slotting and punching mechanism.

[0018] Figure 4 for Figure 3 Middle BB section view.

[0019] Figure 5 for Figure 4 A partial enlarged view of .

[0020] Figure 6 This is the finished product picture of PVC rubber.

[0021] Figure 7 This is a cross-sectional view of the finished sound insulation cotton product.

[0022] Among them, 1-frame, 11-horizontal axis, 12-PVC rubber, 13-forearm rod, 2-rotating frame, 3-vertical rod, 31-top block, 4-wedge block, 41-spring 1, 42-top rod, 43-top cone, 431-blade, 44-spring 2, 45-push piece, 5-rolling ring, 51-annular groove, 52-discharge port, 53-through hole, 6-shovel blade, 121-cavity, 122-connecting hole, 123-groove, 124-high barrier membrane, 125-felt. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] Example 1: The specific preparation process of the sound insulation cotton sheet using a high barrier film is as follows:

[0025] S1: Prepare a PVC sheet by the compression molding method. A number of grooves are evenly arranged in a matrix on the obtained PVC sheet. The grooves are cylindrical. Hot-press a thin PVC skin on the surface of the PVC sheet. The PVC skin covers the grooves and closes the grooves to form a cavity to obtain a PVC matrix.

[0026] S2: Straighten the PVC matrix through two sets of double-roller feeding mechanisms and then load it. A PVC surface processing device is arranged between the two sets of double-roller feeding mechanisms. The double-roller feeding mechanisms control the PVC matrix to move on the platform of the frame 1 of the PVC surface processing device. Adjust the distance between the scraping knife 6 and the platform of the frame 1. When the PVC rubber sheet passes through the scraping knife 6, a flat groove 123 with a certain width is scraped out on the PVC rubber sheet. When the PVC rubber sheet continues to move forward, the rolling ring 5 is pressed into the groove 123. The rolling ring 5 rotates around the horizontal axis 11 as the PVC rubber sheet moves forward. At this time, there is no relative sliding between the rolling ring 5 and the groove 123. When the through hole 53 rolls to the side wall of the groove 123 and aligns with the cavity 121, the wedge block 4 contacts the side wall of the top block 31. As the rolling ring 5 rotates, the wedge block 4 is pushed to both sides by the top block 31. The wedge block 4 compresses the first spring 41 and pushes the ejector rod 42 to slide outward. The ejector rod 42 drives the ejector cone 43 to also slide outward until the ejector cone 43 extends out of the through hole 53 and pierces into the cavity 121 from the side wall of the groove 123. Since a blade 431 is provided at the front of the ejector cone 43, during the process of the ejector cone 43 piercing into the cavity 121, radial incisions are formed on the side wall of the groove 123. When the wedge block 4 slides to the rear end of the top block 31 and disengages from the top block 31, under the action of the first spring 41, the wedge block 4 resets inward. The wedge block 4 drives the ejector rod 42 and the ejector cone 43 to quickly retract. During the retraction process of the ejector cone 43, the waste material is cut by the annular cutting edge at its rear end. The cut waste material squeezes the pusher plate 45 and compresses the second spring 44. After the ejector cone 43 quickly retracts into the through hole 53 and resets, due to the blockage of the side wall of the annular groove 51 at the rear, the waste material remains in the cylindrical rear part of the ejector cone 43. At this time, a connection hole 122 is formed on the side wall of the groove 123. The connection hole 122 communicates the groove 123 and the cavity 121. Repeating the above punching process can periodically form connection holes 122 on the side wall of the groove 123. When the same ejector cone 43 executes the cutting and punching process again, during the process of the ejector cone 43 extending outward, the second spring 44 pushes the pusher plate 45 to reset. The pusher plate 45 pushes the waste material remaining in the rear part of the ejector cone 43 out and into the discharge port 52. The waste material finally escapes from the discharge port 52 as the rolling ring 5 rotates. Since the waste material is cut by the radial incisions formed at the front during the cutting at the rear of the ejector cone 43, the waste material is several small fragments instead of circular or annular pieces, which can avoid the phenomenon that the waste material gets stuck on the ejector rod 42 and cannot fall into the discharge port 52. After the grooves 123 and connection holes 122 in one direction are prepared, feed in the opposite direction and continue to prepare the grooves 123. A square is formed at the intersection of the grooves 123 in two directions, and the cavity 121 is located inside the square. In this way, the PVC rubber sheet can be manufactured. The structure of the PVC rubber sheet is as Figure 6 shown.

[0027] S3: Apply glue on one side of the high-barrier film 124, press and bond it to the side of the PVC rubber sheet with grooves 123. The grooves 123 and the high-barrier film 124 enclose to form a channel structure. Then apply glue on the other side of the high-barrier film 124, and press and bond the felt 125 to the high-barrier film 124 to obtain the sound insulation cotton sheet (as Figure 7 shown). The high-barrier film 124 is composed of a five-layer composite film of PVC + PVDC + PP + VMPET + PE.

[0028] The PVC surface processing device used in the above S2 step includes several groups of parallel slitting and punching mechanisms. The slitting and punching mechanisms are as Figures 1 to 5 shown, including a frame 1. A horizontal shaft 11 is provided at the top of the frame 1. A rotating frame 2 is rotatably connected to the horizontal shaft 11. A rolling ring 5 is provided on the rotating frame 2. An annular groove 51 is provided inside the rolling ring 5. A number of transverse punching components are evenly arranged along the circumference in the annular groove 51. A vertical rod 3 is vertically fixed under the horizontal shaft 11. A triangular top block 31 is fixed at the lower end of the vertical rod 3. When the rolling ring 5 rotates, the transverse punching components are successively pushed out by the top block 31 for circular punching on the side wall of the groove 123 on the PVC rubber sheet. A slitting component is also provided on the horizontal shaft 11. The slitting component includes a front arm rod 13 provided on the horizontal shaft 11. A shovel knife 6 is provided at the lower end of the front arm rod 13. The shovel knife 6 is provided in front of the rolling ring 5.

[0029] In this embodiment, the transverse punching component includes a top rod 42 slidably connected to the side wall of the annular groove 51. A wedge block 4 is provided at the inner end of the top rod 42. A punching component is provided at the outer end of the top rod 42. A first spring 41 is provided between the wedge block 4 and the side wall of the annular groove 51. The first spring 41 is sleeved outside the top rod 42. A through hole 53 is also provided on the side wall of the annular groove 51. A number of discharge ports 52 are evenly arranged along the circumference on the rolling ring 5. The discharge ports 52 are communicated with the through hole 53. The punching component includes a top cone 43 coaxially sleeved on the outer end of the top rod 42. The front part of the top cone 43 is conical, and the rear part is a hollow cylinder. An annular cutting edge is provided at the round opening at the rear end of the top cone 43. A pushing piece 45 is slidably connected inside the rear part of the top cone 43. The pushing piece 45 is slidably connected to the top rod 42. A second spring 44 is provided between the pushing piece 45 and the front part of the top cone 43. The second spring 44 is sleeved outside the top rod 42. A number of blades 431 are provided on the outer wall of the conical part of the top cone 43. The blades 431 are arranged radially with the cone tip as the center.

[0030] Example 2: Study the influence of the material and setting method of the high-barrier film on the noise reduction effect of the sound insulation cotton sheet:

[0031] The preparation method of the sound insulation cotton sheet is the same as that of Example 1. In this example, the high-barrier film is composed of an outer layer film, a middle layer film and an inner layer film. The outer layer film is made of nylon or PVC, the middle layer film is selected from VMPET film, PVDC film, PVA film, PP film, PVC film, and the inner layer film is made of PE. The specific combination methods are shown in Table 1:

[0032] Table 1 Influence of high-barrier film on the noise reduction effect of the sheet

[0033]

[0034] It can be seen from the results in Table 1 that only when the high-barrier film is set between the PVC rubber sheet and the felt can the noise reduction effect of the sheet be greatly improved in the range of 500-4000 Hz. Therefore, when the sheet is composed of felt, high-barrier film, and PVC sheet from the outside to the inside, the sound insulation amount of the sheet can be effectively increased, and the sound insulation and noise reduction effect of the sheet can be greatly improved. The reason is that if the grooves formed after the surface of the PVC are not closed by the high-barrier film, a resonance absorption structure is not formed. Instead, the thickness of the PVC rubber sheet at the grooves is reduced, and sound waves are easily transmitted through the PVC rubber sheet, resulting in a poor overall sound insulation effect. Even if the felt is covered, the above problem cannot be completely changed, and only the sound insulation amount of the sheet can be slightly increased.

[0035] Control Example 1: The rest are the same as Example 1, except that the grooving and punching operations are not carried out using the PVC surface processing device, and the punching operation is carried out on the side wall of the groove by first opening the groove and then punching from the groove into the cavity.

[0036] The noise reduction effects of the sound insulation cotton sheets prepared in Control Example 1 and Example 1 were detected, and the results are as follows:

[0037] Table 2 Influence of different punching operations on the noise reduction effect of the sheet

[0038]

[0039] The results in Table 2 show that after changing the punching method, the sound insulation quantity of the sound insulation cotton sheet decreases at each frequency. This is mainly because although the punching method from outside to inside can form connecting holes, the waste materials formed by punching are easily left in the cavity and cannot be taken out. When the sound insulation cotton sheet is in a vertical state, the waste materials in the cylindrical cavity are easily silted up on the connecting holes, resulting in the blockage of the connecting holes, thus affecting the resonance sound absorption effect of the cavity and leading to the decrease of the sound insulation quantity. In addition, since the thickness of the PVC rubber itself does not exceed 1 cm and the grooves are flat and narrow, it is very difficult for the punching device to keep horizontal when punching on the side wall of the groove, and it is very difficult to control the punching direction, resulting in the inability to ensure the uniformity of the shape, aperture and depth of the connecting holes. And one of the influencing factors for the resonance sound absorption structure to play a role is the hole property of the connecting holes. Therefore, the punching quality of the connecting holes directly affects the sound absorption and insulation effect of the sound insulation cotton sheet.

[0040] As is known by common technical knowledge, the present invention can be implemented by other embodiments that do not depart from its spiritual essence or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A building sound insulation sheet using a high barrier film, characterized in that: It is formed by gluing PVC rubber, high-barrier film and felt layer by layer, wherein the high-barrier film is arranged between the PVC rubber and the felt; the high-barrier film is composited by an outer film, a middle film and an inner film, wherein the outer film is made of nylon or PVC, the middle film is composited of at least one of VMPET film, PVDC film, PVA film, PP film and PVC film, and the inner film is made of PE material.

2. The architectural sound insulation sheet using a high barrier film according to claim 1, characterized in that: The preparation method of the PVC rubber is as follows: a PVC surface processing device is used to scrape a single side surface of a PVC substrate to form a plurality of grooves, the intersection of the grooves forms a block, a cavity is preset in the block, the PVC surface processing device periodically punches holes on the side walls of the grooves during scraping to form connecting holes, the connecting holes are connected to the cavities, and the PVC surface processing device cuts from the cavities to the grooves during punching and takes out the cutting waste.

3. The architectural sound insulation sheet using a high barrier film according to claim 2, characterized in that: The PVC surface processing device comprises a plurality of groups of slotting and punching mechanisms arranged in parallel, the slotting and punching mechanisms comprising a frame (1), a transverse axis (11) being arranged on the top of the frame (1), a rotating frame (2) being rotatably connected to the transverse axis (11), a rolling ring (5) being arranged on the rotating frame (2), an annular groove (51) being arranged on the inner side of the rolling ring (5), a plurality of transverse punching components being evenly arranged in the circumferential direction in the annular groove (51), a vertical rod (3) being vertically fixed under the transverse axis (11), a triangular top block (31) being fixed at the lower end of the vertical rod (3), when the rolling ring (5) rotates, the transverse punching components are sequentially ejected by the top block (31) for cyclically punching holes on the groove side wall on the PVC rubber, a slotting component is also arranged on the transverse axis (11), and the slotting component is arranged in front of the rolling ring (5).

4. The architectural sound insulation sheet using a high barrier film according to claim 3, characterized in that: The transverse punching assembly comprises a push rod (42) slidably connected to the side wall of the annular groove (51), a wedge block (4) is provided at the inner end of the push rod (42), a punching assembly is provided at the outer end of the push rod (42), a spring (41) is provided between the wedge block (4) and the side wall of the annular groove (51), the spring (41) is sleeved outside the push rod (42), a through hole (53) is also provided on the side wall of the annular groove (51), when the wedge block (4) is displaced by the push block (31), the punching assembly extends outward from the through hole (53), a plurality of discharge ports (52) are evenly provided on the rolling ring (5) along the circumferential direction, and the discharge ports (52) are connected to the through hole (53).

5. The architectural sound insulation sheet using a high barrier film according to claim 4, characterized in that: The punching assembly comprises a top cone (43) coaxially sleeved on the outer end of a push rod (42); the front portion of the top cone (43) is conical and the rear portion is hollow cylindrical; an annular cutting edge is provided on the rear end circular opening of the top cone (43); a push piece (45) is slidably connected inside the rear portion of the top cone (43); the push piece (45) is slidably connected to the push rod (42); a second spring (44) is provided between the push piece (45) and the front portion of the top cone (43); the second spring (44) is sleeved outside the push rod (42).

6. The architectural sound insulation sheet using a high barrier film according to claim 5, characterized in that: A plurality of blades (431) are provided on the outer wall of the conical portion of the top cone (43), and the blades (431) are arranged radially with the cone tip as the center.

7. The architectural sound insulation sheet using a high barrier film according to claim 3, characterized in that: The slotting assembly comprises a front arm rod (13) arranged on a transverse axis (11), a scraper (6) is arranged at the lower end of the front arm rod (13), and the scraper (6) is arranged in front of the rolling ring (5).

Images