CN114378932A

CN114378932A - Core pulling process for acoustic screen

Info

Publication number: CN114378932A
Application number: CN202111648979.XA
Authority: CN
Inventors: 陈怀焜; 徐金山; 蔡云; 张绍文; 徐宇衔
Original assignee: Fujian Qunfeng Machinery Co Ltd
Current assignee: Fujian Qunfeng Machinery Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-22
Anticipated expiration: 2041-12-30
Also published as: CN114378932B

Abstract

The invention discloses a core pulling process for an acoustic screen, which comprises the following steps: step S1, placing concrete into a core-pulling mold, and compacting the concrete by the core-pulling mold to form a panel, wherein a bolt is arranged in the core-pulling mold; step S2, inserting a core rod into the core-pulling mould, and enabling the core rod to abut against the plug pin; step S3, continuously placing the concrete into the core-pulling mold, covering the core rod, and compacting the concrete again by the core-pulling mold to form a back layer; and step S4, separating the core rod from the core-pulling mold, and disassembling the core-pulling mold to form the acoustic screen plate with the cavity. The sound screen plate manufactured by the process has strong integral uniformity and good sound absorption effect. Because the front panel and the back layer of the sound screen plate are compacted through the core-pulling die, the uniformity of the front panel and the uniformity of the back layer are similar, and the integral uniformity of the sound screen plate is high.

Description

Core pulling process for acoustic screen

Technical Field

The invention relates to the technical field of sound screens, in particular to a core pulling process of a sound screen.

Background

The acoustic screen plate is generally used for sound insulation and noise reduction of highways, expressways, overhead composite roads and other noise sources, and mainly has the functions of blocking direct sound from a sound source to a sound receiving point, reducing diffracted sound and further reducing the influence of noise on various places.

The traditional sound screen plate shell is usually made of metal materials, and the sound screen plate is usually influenced by rain and weather because the sound screen plate is usually arranged in an open place, so that the manufacturing materials of the sound screen plate are easy to corrode and age, and the service life is short.

Some sound screens made of concrete exist in the prior art, however, the step of making the sound screens with concrete in the prior art is complicated, the automation degree is low, the efficiency is low, and the sound absorption effect of the made sound screens is poor. Meanwhile, the sound screen plate manufactured by the prior art is poor in uniformity and poor in sound absorption effect.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, the invention aims to provide a core pulling process for an acoustic screen, and the acoustic screen manufactured by the process has strong integral uniformity and good sound absorption effect.

In order to achieve the above object, an embodiment of the present invention provides a core pulling process for an acoustic panel, including the following steps:

step S1, placing concrete into a core-pulling mold, and compacting the concrete by the core-pulling mold to form a panel, wherein a bolt is arranged in the core-pulling mold;

step S2, inserting a core rod into the core-pulling mould, and enabling the core rod to abut against the plug pin;

step S3, continuously placing the concrete into the core-pulling mold, covering the core rod, and compacting the concrete again by the core-pulling mold to form a back layer;

and step S4, separating the core rod from the core-pulling mold, and disassembling the core-pulling mold to form the acoustic screen plate with the cavity.

According to the core-pulling process of the acoustic screen plate, when the acoustic screen plate is manufactured, concrete is placed into a core-pulling mold, the core-pulling mold preliminarily compacts the concrete to form the panel, a core rod is inserted into the core-pulling mold, the concrete is continuously placed into the core-pulling mold and covered by the core rod, the core-pulling mold compacts the concrete again to form the back layer, the core rod is separated from the core-pulling mold, the acoustic screen plate with the cavity can be formed, and finally the sound-absorbing material is placed in the cavity of the acoustic screen plate. Because the plug is supported and is leaned on the bolt, the bolt corresponds the position and forms and inhale the sound hole, and the plug breaks away from behind the loose core mould, the cavity with inhale the sound hole and communicate with each other, the cavity is through inhaling sound hole and external intercommunication, with sound absorbing material if inhale sound cotton or cystosepiment and arrange this cavity in, external sound can be through inhaling in the sound cotton of sound hole entering to absorb the noise, reduce the noise, it is effectual to inhale the sound. Meanwhile, the front panel and the back layer of the sound screen plate are compacted through the core-pulling die, so that the uniformity of the front panel and the uniformity of the back layer are similar, and the integral uniformity of the sound screen plate is high.

In addition, the core pulling process for the acoustic panel provided by the embodiment of the invention can also have the following additional technical characteristics:

further, the method comprises a step S11, wherein the step S11 is located between the step S1 and the step S2, and the step S11 is to connect a vibration exhaust device with the core-pulling mold to flatten the concrete.

Further, step S31 is included, wherein step S31 is located between step S3 and step S4, and step S31 is: and connecting the vacuum suction device with the core-pulling mold to rapidly mold.

Further, step S32 is included, step S32 is located between step S31 and step S4, and step S32 is: and connecting the cover plate with the core-pulling mold, and then maintaining the whole body.

Further, step S5 is included, step S5 is located after step S4, and step S5 is: sound absorbing material is disposed within the cavity of the acoustic panel.

Further, the core-pulling mold comprises a mold frame, a bottom plate and a bottom frame; the die frame can be arranged in a vibrating way, and a core pulling hole for inserting the core rod is formed at the side part of the die frame; the bottom plate is arranged at the bottom of the mold frame, and a plurality of jacks are formed in the bottom plate; but the underframe vibration setting, the underframe setting is in framed bottom or bottom plate bottom, sets up the bolt of a plurality of insertion jacks on the underframe.

Further, the core pulling holes comprise at least two groups of core pulling hole groups which are arranged side by side.

Further, the die frame further comprises a core rod, and the core rod is provided with an inclined surface which is convenient to separate from the die frame.

Furthermore, each bolt comprises an installation part, an insertion part and a forming part, wherein the installation part is installed on the bottom frame, the insertion part is inserted into the bottom plate, and the forming part protrudes out of the bottom plate.

Furthermore, the end face of the forming part is in a plane state, and the heights of all the pins are consistent.

Further, the forming part is in a circular truncated cone shape.

Further, still include sealed the pad, sealed the pad and be located between bottom plate and the framed, sealed pad forms the perforation that supplies the bolt to penetrate, and the fenestrate aperture slightly is less than the aperture of inserted part.

Further, a vibration motor is arranged on the side of the mould frame.

Further, a vibrator is arranged on the side of the bottom frame.

Furthermore, the bottom of the mold frame is provided with a guide pillar, and the bottom plate and the bottom frame are provided with guide holes for the guide pillar to be inserted into.

Further, the end part of the guide post is in an inverted frustum shape.

Drawings

FIG. 1 is a schematic structural diagram of the production steps of the core pulling process of the acoustic panel according to the embodiment of the invention;

FIG. 2 is a schematic structural diagram of a core mold according to an embodiment of the invention;

FIG. 3 is an exploded view of a core mold according to an embodiment of the invention;

FIG. 4 is a schematic structural view of a bottom frame of the core back mold according to the embodiment of the invention;

FIG. 5 is a schematic structural diagram of a plug of a core back mold according to an embodiment of the invention;

FIG. 6 is a schematic view of the connection of a core mold and a vibratory venting device according to an embodiment of the invention;

FIG. 7 is a schematic structural view of a core rod disposed in a core back mold according to an embodiment of the invention;

FIG. 8 is a schematic view of a core mold casting a backing layer according to an embodiment of the present invention;

FIG. 9 is a schematic view of a connection between a core mold and a vacuum apparatus according to an embodiment of the invention;

FIG. 10 is a schematic view of a connection between a core mold and a cover plate according to an embodiment of the invention;

FIG. 11 is a schematic structural view illustrating the disassembly of a core pulling mold during demolding according to an embodiment of the invention;

fig. 12 is a schematic structural view of a sound panel according to an embodiment of the present invention.

Description of the reference symbols

The core back mold 1, the mold frame 11, the core pulling hole 111, the first core pulling hole group 111a, the second core pulling hole group 111b, the first core pulling hole 1111, the second core pulling hole 1112, the vibration motor 112, the guide post 113, the core rod 12, the inclined surface 121, the bottom plate 13, the insertion hole 131, the bottom frame 14, the plug pin 141, the mounting portion 1411, the insertion portion 1412, the molding portion 1413, the vibrator 142, the gasket 15, the through hole 151, the guide hole 16, and the connection hole 17;

the vibration exhaust device 2, the first connecting pin 21, the first frame body 22, the vibration exhaust motor 23 and the vibration exhaust rod 24;

the vacuum suction device 3, the second frame body 31, the suction disc 32 and the connecting port 33;

the cover plate 4, the second connecting pin 41;

acoustic panel 10, panel 101, backing layer 102, cavity 103, sound absorbing hole 104.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 12, a core pulling process for an acoustic panel according to an embodiment of the present invention includes the following steps:

step S1, placing concrete into the core-pulling mold 1, and compacting the concrete by the core-pulling mold 1 to form the panel 101, wherein the core-pulling mold 1 is internally provided with a bolt 141;

step S2, inserting the core rod 12 into the core back mold 1, and making the core rod 12 abut against the plug 141;

step S3, continuously placing the concrete into the core-pulling mold 1, covering the core rod 12, and compacting the concrete again by the core-pulling mold 1 to form the back layer 102;

in step S4, the core rod 12 is detached from the core back mold 1, and the core back mold 1 is disassembled to form the acoustic panel 10 having the cavity 103.

When the acoustic screen panel 10 is manufactured, concrete is placed into the core-pulling mold 1, the core-pulling mold 1 primarily tamps the concrete to form the panel 101, the core rod 12 is inserted into the core-pulling mold 1, the concrete is continuously placed into the core-pulling mold 1, the core rod 12 is covered, the core-pulling mold 1 tamps the concrete again to form the back layer 102, the core rod 12 is made to be separated from the core-pulling mold 1, the acoustic screen panel 10 with the cavity 103 can be formed, and finally, the acoustic absorption material is placed into the cavity 103 of the acoustic screen panel 10. Because the core rod 12 is abutted against the plug pin 141, the plug pin 141 corresponds to the position to form the sound absorbing hole 104, and after the core rod 12 is separated from the core pulling mold 1, the cavity 103 is communicated with the sound absorbing hole 104, the cavity 103 is communicated with the outside through the sound absorbing hole 104, and after sound absorbing materials such as sound absorbing cotton are placed in the cavity 103, outside sound can enter the sound absorbing cotton through the sound absorbing hole 104, so that the noise is absorbed, the noise is reduced, and the sound absorbing effect is good. Meanwhile, since both the face plate 101 and the back plate 102 of the acoustic panel 10 are compacted by the core back mold 1, the uniformity of the face plate 101 and the back plate 102 is similar, so that the overall uniformity of the acoustic panel 10 is strong.

Optionally, a step S11 is further included, wherein the step S11 is located between the step S1 and the step S2, and the step S11 is to connect the vibration exhausting device 2 with the core back mold 1 to flatten the concrete. Because set up bolt 141 in the loose core mould 1, if can set up a plurality of bolts 141 that parallel side by side is even for the concrete mobility of pouring is very poor, consequently, cooperation vibration exhaust apparatus 2 together exhausts in this example, can effectively flatten the concrete, can form the air escape in the clearance between the concrete simultaneously, makes whole comparatively closely knit.

In this example, step S31 is further included, step S31 is located between step S3 and step S4, and step S31 is: and connecting the vacuum suction device 3 with the core-pulling mold 1 to perform rapid molding. The vacuum suction device 3 quickly sucks moisture and gas from the backing layer 102, so that it can be molded more quickly, thereby improving the production efficiency.

As an example, step S32 is further included, step S32 is located between step S31 and step S4, and step S32 is: and connecting the cover plate 4 with the core-pulling mold 1, and then curing the whole.

Since the acoustic panel 10 is formed by a tap core, the acoustic panel 10 cannot be detached from the core mold 1 immediately after moisture and gas of the back layer 102 are rapidly sucked by the vacuum suction device 3, or the face plate 101 of the acoustic panel 10 may be damaged. Therefore, in step S32, the cover plate 4 is placed and the whole is placed in a pre-curing cellar for curing, so as to improve the production efficiency, and after curing, the cover plate 4 is removed, the core rod 12 is extracted, and the core-pulling mold 1 is detached, so as to complete the manufacture of the acoustic screen panel 10.

Finally, step S5 is also included, step S5 is located after step S4, and step S5 is: the sound-absorbing material is placed in the cavity 103 of the sound screen panel 10, and the sound-absorbing material is preferably sound-absorbing cotton, so that the sound-absorbing effect of the sound-absorbing cotton is good, and the sound-absorbing cotton is an existing material and is not described herein any more. Of course, it may be a sound absorbing material such as a foam board.

In this example, the core back mold 1 includes a mold frame 11, a bottom plate 13, and a bottom frame 14; the die frame 11 can be arranged in a vibrating way, and the side part of the die frame 11 is provided with a core pulling hole 111 for inserting the core rod 12; the core rod 12 can be inserted into the core-pulling hole 111, and the core rod 12 is attached to the core-pulling hole 111; the bottom plate 13 is arranged at the bottom of the mold frame 11, and a plurality of insertion holes 131 are formed in the bottom plate 13; the bottom frame 14 is installed to be capable of vibrating, the bottom frame 14 is installed at the bottom of the mold frame 11 or the bottom of the bottom plate 13, and a plurality of pins 141 inserted into the insertion holes 131 are installed on the bottom frame 14.

When the sound screen panel 10 is manufactured, the bottom plate 13 and the bottom frame 14 are sequentially installed, then a part of material, such as concrete material, is added into the mold frame 11, the mold frame 11 and the bottom frame 14 compact the part of material to form the panel 101 of the sound screen panel 10, then the core rod 12 is inserted into the core drawing hole 111, so that the bottom of the core rod 12 abuts against the end of the bolt 141, then the concrete material is added into the mold frame 11, the mold frame 11 and the bottom frame 14 continue to vibrate, so that the concrete material is compacted to form the back layer 102, after maintenance is completed, the core rod 12 can be drawn out from the core drawing hole 111, the bottom plate 13 and the bottom frame 14 are detached, at this time, the cavity 103 is formed in the sound screen panel 10, the cavity 103 is communicated with the sound absorption holes 104 formed by the plurality of bolts 141, a sound absorption material, such as sound absorption cotton, can be placed into the cavity 103, so that the sound absorption cotton is communicated with the outside through the sound absorption holes 104, and the sound absorption effect is improved. Since the front plate 101 and the back plate 102 are compacted by concrete through the form frame 11 and the bottom frame 14 when the acoustic panel 10 is manufactured, the manufactured acoustic panel 10 has high overall uniformity.

By providing the bottom plate 13, when the bottom frame 14 is detached, the weight of the acoustic panel 10 is supported on the bottom plate 13, so that the latch 141 of the bottom frame 14 is separated from the acoustic panel 10, the panel 101 of the acoustic panel 10 is not damaged by demolding, and the flatness of the panel 101 of the acoustic panel 10 is maintained.

Optionally, the core pulling hole 111 includes at least two core pulling hole groups arranged side by side, as shown in fig. 2 and fig. 3, in this example, the core pulling hole 111 includes a first core pulling hole group 111a and a second core pulling hole group 111b arranged side by side with the first core pulling hole group 111 a. Wherein, every group loose core hole group includes first loose core hole 1111 and second loose core hole 1112, the area of first loose core hole 1111 is greater than the area of second loose core hole 1112, because after core rod 12 inserted loose core hole 111, core rod 12 laminating loose core hole 111, that is to say, the area that core rod 12 inserted first loose core hole 1111 place is greater than the area that core rod 12 inserted second loose core hole 1112 place, make core rod 12 cross-section can be isosceles trapezoid, right trapezoid or other similar shapes, so that core rod 12 forms the inclined plane 121 that is convenient for break away from framed 11, when making the preliminary shaping of sound screen panel 10, when core rod 12 breaks away from sound screen panel 10, be convenient for take out core rod 12.

In some examples, each of the pins 141 includes a mounting portion 1411, an insertion portion 1412 and a forming portion 1413, the mounting portion 1411 is mounted on the bottom frame 14, the insertion portion 1412 is inserted into the bottom plate 13, the forming portion 1413 protrudes from the bottom plate 13, the mounting portion 1411 is disposed on the bottom frame 14 and the insertion portion 1412 is inserted into the bottom plate 13 when mounted, so that the forming portion 1413 protrudes from the bottom plate 13, so that the sound absorbing hole 104 is formed in the sound panel 10 when the sound panel 10 is manufactured.

Further, the end face of the forming portion 1413 is in a planar state, the height of each plug pin 141 is consistent, after the core rod 12 is inserted into the core pulling hole 111, because the height of each plug pin 141 is consistent, the end face of each forming portion 1413 is in a planar state, so that the end face of each plug pin 141 forming portion 1413 is abutted against the bottom of the core rod 12, after concrete materials are poured into the mold frame 11, the materials cannot exist between the end face of the forming portion 1413 and the core rod 12, so that the sound absorption holes 104 of the manufactured sound screen plate 10 are communicated with the cavity 103, and after the sound absorption cotton is placed, the sound absorption cotton is directly communicated with the outside through the sound absorption holes 104, and sound absorption is facilitated. The mandrel 12 may be made of a concrete material or a metal material, such as a steel material, so that the weight of the mandrel 12 is large, and the mandrel 12 can be closely attached to the end surface of the forming portion 1413 when the mold frame 11 and the base frame 14 vibrate.

In some examples, the forming portion 1413 is a circular truncated cone, the forming portion 1413 protrudes from the bottom plate 13, when pouring, the concrete material covers the forming portion 1413, when demolding, the sound absorbing hole 104 is formed at a position corresponding to the forming portion 1413, and since the forming portion 1413 is a circular truncated cone, the sound absorbing hole 104 is also a circular truncated cone, that is, the aperture of the end of the sound absorbing hole 104 close to the outside is larger than the aperture of the end of the sound absorbing hole 104 far away from the outside, so that more noise can be absorbed conveniently, and the sound absorbing effect is better.

In some examples, the core back mold 1 further includes a gasket 15, the gasket 15 is located between the bottom plate 13 and the mold frame 11, the gasket 15 forms a through hole 151 for the plug 141 to penetrate, the aperture of the through hole 151 is slightly smaller than that of the insertion portion 1412, when the plug 141 is inserted into the through hole 151 of the gasket 15, the plug 141 and the gasket 15 are in a substantially interference fit, so that the water component in the concrete material is effectively prevented from leaking out of the bottom plate 13, and the sealing performance is excellent.

In this example, the vibration motor 112 is disposed at a side portion of the mold frame 11, two mounting plates may extend from two sides of the mold frame 11, two vibration motors 112 may be disposed, and the two vibration motors 112 are respectively mounted on one mounting plate. The vibrator 142 is disposed at a side of the bottom frame 14, one vibrator 142 is mounted at one side of the bottom frame 14, and another vibrator 142 is mounted at the other side of the bottom frame 14, wherein the vibrator 142 may be a pneumatic gear type vibrator.

In this example, the guide posts 113 are provided on the bottom of the mold frame 11, and the guide holes 16 into which the guide posts 113 are inserted are provided on the bottom plate 13 and the bottom frame 14. Wherein, the end of the guide post 113 is of an inverted circular truncated cone shape, that is, the end of the guide post 113 has an arc-shaped guide surface, so that the guide post 113 can be inserted into the guide hole 16 more conveniently.

In this example, the top of the mold frame 11 may further be provided with a connecting hole 17, and the whole core back mold 1 may be conveyed along the conveying line. When loose core mold 1 carried to vibration exhaust station, vibration exhaust apparatus 2 was last to set up first connecting pin 21, and first connecting pin 21 inserts connecting hole 17 and connects, then vibration exhaust apparatus 2 carries out work in order effectively to shakeout the concrete, conveniently forms the air escape in the clearance between the concrete simultaneously, is whole comparatively closely knit. As shown in fig. 6, the vibration exhaust apparatus 2 further includes a first frame 22, a vibration exhaust motor 23 and a vibration exhaust rod 24, the first connecting pin 21 is fixed on the first frame 22, the vibration exhaust motor 23 is disposed on the first frame 22, an end portion of the vibration exhaust rod 24 is inserted into the concrete, and the vibration exhaust rod 24 is connected to the vibration exhaust motor 23 and driven by the vibration exhaust motor 23 to vibrate, so as to effectively flatten the concrete.

When the core back mold 1 is conveyed to the vacuum suction station, as shown in fig. 9, the vacuum suction device 3 has a second frame body 31, a suction cup 32 and a connection port 33, the second frame body 31 is connected to the core back mold 1, the suction cup 32 is connected to the second frame body 31, the suction cup 32 is close to the back layer 102, the connection port 33 is connected to the suction cup 32, and the connection port 33 can be connected to a suction mechanism to quickly suck moisture and gas in the back layer 102, so that the core back mold can be molded more quickly, and the production efficiency is improved.

When the core back mold 1 is transported to the front of the curing station, as shown in fig. 10, the cover plate 4 is installed, the second connecting pin 41 may be disposed on the cover plate 4, the second connecting pin 41 is inserted into the connecting hole 17 for connection, and then the core back mold 1 may be entirely grabbed to the pre-curing cellar for curing. After the curing is completed, as shown in fig. 11, the core back mold 1 may be detached and the core back mold 1 may be reused.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims

1. A core pulling process for an acoustic screen is characterized by comprising the following steps:

2. The acoustic screen core pulling process according to claim 1, characterized in that: step S11 is further included, step S11 is located between step S1 and step S2, and step S11 is to connect the vibrating air exhausting device with the core back mold to flatten the concrete.

3. The acoustic screen core pulling process according to claim 1, characterized in that: step S31 is further included, where step S31 is located between step S3 and step S4, and step S31 is: and connecting the vacuum suction device with the core-pulling mold to rapidly mold.

4. The acoustic screen core pulling process according to claim 3, characterized in that: step S32 is further included, step S32 is located between step S31 and step S4, and step S32 is: and connecting the cover plate with the core-pulling mold, and then maintaining the whole body.

5. The acoustic screen core pulling process according to any one of claims 1 to 4, wherein: the core-pulling mold comprises a mold frame, a bottom plate and a bottom frame; the die frame can be arranged in a vibrating way, and a core pulling hole for inserting the core rod is formed at the side part of the die frame; the bottom plate is arranged at the bottom of the mold frame, and a plurality of jacks are formed in the bottom plate; but the underframe vibration setting, the underframe setting is in framed bottom or bottom plate bottom, sets up the bolt of a plurality of insertion jacks on the underframe.

6. The acoustic screen core pulling process according to claim 5, wherein: the die frame further comprises a core rod, and the core rod is provided with an inclined plane convenient to separate from the die frame.

7. The acoustic screen core pulling process according to claim 5, wherein: each bolt comprises an installation part, an insertion part and a forming part, wherein the installation part is installed on the bottom frame, the insertion part is inserted into the bottom plate, and the forming part protrudes out of the bottom plate.

8. The acoustic screen core pulling process according to claim 7, wherein: the end face of the forming part is in a plane state, and the heights of all the pins are consistent.

9. The acoustic screen core pulling process according to claim 5, wherein: still include sealed the pad, sealed the pad is located between bottom plate and the framed, and sealed pad forms the perforation that supplies the bolt to penetrate, and the fenestrate aperture slightly is less than the aperture of insertion part.

10. The acoustic screen core pulling process according to claim 5, wherein: a vibration motor is arranged on the side part of the mould frame; the vibrator is arranged on the side of the bottom frame.