Preparation device and preparation method of YDB sound-absorbing and heat-insulating material

Abstract

The invention discloses a preparation device and a preparation method of a YDB sound-absorbing and heat-insulating material, and particularly relates to the technical field of functional material manufacturing. Filtering is performed; performing metering; forming fibers; stretching is conducted; cooling is performed; the device comprises a screw extrusion assembly, the screw extrusion assembly comprises a supporting frame, the top of the supporting frame is fixedly connected with an extrusion cylinder, the top of the extrusion cylinder communicates with a feeding assembly, a plurality of heating assemblies are arranged on the outer edge face of the extrusion cylinder, a rotating cylinder is arranged in the extrusion cylinder, and a plurality of control panels are evenly distributed in the rotating cylinder; according to the extrusion device, each part of materials in the extrusion cylinder can be uniformly heated, the caking phenomenon of the materials can be effectively reduced, and the processing quality of the materials is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of functional material manufacturing, and more specifically, to a preparation device and a preparation method of a YDB sound-absorbing and heat-insulating material. Background Art

[0002] YDB sound-absorbing and heat-insulating materials are mostly composed of polyester fibers and polypropylene microfibers, with spunbond cloth or aluminum foil on the surface. During manufacturing, the finished products of polyester fibers and polypropylene microfibers are generally blown, and then the surface is covered with spunbond cloth or aluminum foil. It has good sound absorption effect, can absorb sounds of different frequencies, has excellent heat insulation performance, and can effectively reduce heat transfer. It is mainly used in high-end automobiles to enhance the sound absorption and heat insulation effect. In the preparation process of YDB sound-absorbing and heat-insulating materials, melt-blowing, filling and sewing processes are required. In the melt-blowing process, a screw extrusion assembly is required to feed the raw material PP particles into the screw extruder, which is heated, melted, extruded and filtered into a molten slurry.

[0003] For example, a Chinese patent document with application number 202311098814.9 discloses a single-screw extrusion assembly, which relates to the technical field of screw extrusion assemblies, including a support, a power unit and an extrusion barrel are fixedly connected to the support, an extrusion die head is installed on the extrusion barrel, a rotating shaft is installed on the power unit, the rotating shaft is located in the extrusion barrel, a first spiral blade is fixedly connected to the rotating shaft, a first spur gear is fixedly connected to the rotating shaft, the support is rotatably provided with a second spur gear meshing with the first spur gear through a connecting rod, the extrusion barrel is rotatably provided with a first rotating frame, the first rotating frame is fixedly connected to a rotating disk, the rotating disk is provided with an inner gear ring meshing with the second spur gear, the first rotating frame is fixedly connected with a second spiral blade, the support is provided with a heating mechanism, and the extrusion die head is provided with a cooling mechanism. The material is fully crushed by the staggered rotation of the second spiral blade and the first spiral blade, and then the heating mechanism is cooperated to ensure that the material in the extrusion barrel is evenly heated and plasticized, and the temperature of the extruded material is kept uniform by the cooling mechanism to ensure the quality of the extruded product.

[0004] This invention can make the material in the extrusion barrel evenly heated and plasticized by the reciprocating rotation of the electric heating sleeve and the heating plate in the heating mechanism, thereby ensuring the quality of the subsequent extruded products. However, the material falling into the extrusion barrel will naturally stratify in the extrusion barrel under the action of gravity. The material close to the outer ring of the extrusion barrel can fully absorb heat and be fully melted. However, as the distance from the side wall of the extrusion barrel increases, the heat absorbed by the material gradually decreases, causing the material in the inner and outer rings of the extrusion barrel to be heated obviously unevenly, which will undoubtedly have a negative impact on the extrusion quality. In the meltblowing process, multiple heating areas need to be divided. When the material is heated unevenly in the extrusion barrel, the screw extrusion assembly continues to push the material forward, and the unevenly heated material is prone to agglomeration. The agglomerated materials continue to move under the continuous propulsion of the screw extruder assembly, but the equipment cannot identify these agglomerated materials and extend their heating time accordingly, which will cause some materials to not be fully heated, and then cause the problem of insufficient plasticization. When these unevenly plasticized materials are extruded, the surface of the finished product will lose its due smoothness, defects will frequently appear, and it will not meet the qualified standards, seriously affecting the overall quality of the product. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a preparation device and a preparation method of a YDB sound-absorbing and heat-insulating material to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a preparation device of YDB sound-absorbing and heat-insulating material, comprising a screw extrusion assembly, the screw extrusion assembly comprising a support frame, an extrusion barrel is fixedly connected to the top of the support frame, a feeding assembly is connected to the top of the extrusion barrel, a plurality of heating assemblies are arranged on the outer edge surface of the extrusion barrel and are evenly distributed along its length direction, a rotatable rotating barrel is arranged in the extrusion barrel, an auger is arranged on the outer edge surface of the rotating barrel, a plurality of control panels are evenly distributed in the rotating barrel along its length direction, the control panel can extend out of the outer wall of the rotating barrel, a stirring plate for stirring the material is hinged in the control panel, when the stirring plate encounters agglomerated material during stirring, the stirring plate adjacent to the stirring plate can be controlled to delay stirring, the extrusion barrel is sealed, and the heating time of the material agglomeration interval is extended.

[0007] Preferably, a reducer is provided on the support frame, and a motor is provided on the support frame. The output end of the motor is connected to the reducer, and the output end of the extruder cylinder is connected to the reducer via a transmission shaft. The reducer can control the rotation of the drum.

[0008] Preferably, a fixed shaft is coaxially fixedly connected inside the extruder, a first cam is fixedly connected to the side of the fixed shaft close to the feed assembly, a plurality of second cams are rotatably connected to the side of the fixed shaft away from the feed assembly, a circular groove is formed on the second cam, and the circular groove is connected to the fixed shaft via a torsion spring.

[0009] Preferably, a plurality of through grooves corresponding to the control plate are opened on the side wall of the rotating drum, and the control plate is slidably connected to the through grooves on the corresponding side. The end of the control plate close to the center of the rotating drum is connected to a contact plate via a plurality of first springs, and the end of the contact plate close to the center of the rotating drum contacts the first cam or the second cam on the corresponding side. A baffle is fixedly connected to the side wall of the control plate, and the top of the baffle is connected to the inner wall of the rotating drum via a plurality of second springs.

[0010] Preferably, a clearance groove is provided at one end of the control plate close to the feed component, and the stirring plate is rotatably connected to the control plate through a rotating shaft, and the end of the rotating shaft close to the feed component extends into the clearance groove, and two rotating rods are fixedly connected to one end of the rotating shaft located in the clearance groove, and a guide column is provided at one end of the rotating rod close to the feed component.

[0011] Preferably, a push rod is provided at one end of the contact plate close to the feed assembly, and the end of the push rod close to the side wall of the rotating drum extends into the give way groove. A transverse groove located in the give way groove is opened on the push rod, and a wedge block is slidably connected in the transverse groove. The end of the wedge block close to the rotating shaft is an inclined surface, and the wedge block can contact with the guide column. The end of the wedge block close to the feed assembly is connected to the side wall of the give way groove via a third spring, and two guide plates are provided on the side of the wedge block close to the rotating shaft.

[0012] Preferably, a slide groove is provided at one end of the control plate away from the feeding component, a slide plate is slidably connected in the slide groove, the end of the slide plate away from the feeding component contacts the side wall of the slide groove via a fourth spring, the end of the slide plate close to the feeding component contacts the stirring plate, and the end of the slide plate away from the feeding component is fixedly connected to a feedback plate.

[0013] Preferably, one end of the feedback plate away from the feed assembly passes through the control plate, and a plurality of brake plates corresponding to the control plate are slidably connected in the rotating drum, and a vertical groove with an opening toward the feed assembly is provided on the brake plate, and the feedback plate is slidably connected to the vertical groove, and the side of the brake plate away from the feed assembly can contact the second cam adjacent to it.

[0014] Preferably, the two longer end surfaces of the stirring plate are inclined surfaces respectively, and the thickness of the end of the stirring plate close to the feeding assembly is smaller than the thickness of the end of the stirring plate away from the feeding assembly.

[0015] A method for preparing a YDB sound-absorbing and heat-insulating material comprises the following steps: S1. Melt extrusion: using a screw extrusion assembly, set the motor power to 18.6kW, the motor speed to 1470r / min, the melt index to 1500, and heat in five zones, with the heating temperature of zone 1 at 180°C, zone 2 at 200°C, zone 3 at 220°C, zone 4 at 240°C, and zone 5 at 250°C; S2. Filtration: A hydraulic filter is used to filter the melt to ensure that the purity of the melt reaches 99.8% to ensure the smooth spinning process. The filter uses a 300-mesh high-mesh filter. The melt pressure after filtration is maintained at about 3 kg, and the filter heating temperature is 250°C; S3. Metering: The metering pump model is 60cc. The melt flow rate is adjusted to control the product weight. The heating temperature of the metering pump is 230℃. S4. Fiber formation: an extrusion die is used, and there are eight heating zones on the die. Since the fluidity of the melt is related to the temperature, the flow rate of the melt in the zone is adjusted by controlling the temperature of each zone. The temperature on both sides of the extrusion die is relatively high, at about 250°C, while the temperature in the middle is relatively low, at about 200°C, so that the plastic melt from the screw extrusion assembly is well distributed in the flow channel of the extrusion die, and is extruded and formed from the spinneret of the die at a uniform speed. The number of holes in the spinneret is 2319, the hole spacing is 3 mm, and the hole diameter is 0.30 mm; S5. Stretching: Use a high-pressure blower to blow the heated high-pressure airflow downward along both sides of the spinneret. The high-pressure airflow has a temperature of 320°C and a pressure of about 2 kg until the fiber is stretched and elongated, completing the stretching process. S6. Cooling: After the melt and polyester staple fibers are mixed and stuck together, they are allowed to cool naturally by adjusting the height of the mesh curtain and the extrusion die head. The height of the mesh curtain and the extrusion die head is controlled between 40cm and 60cm. After the mesh is formed, the polyester staple fibers are filled and mixed in a disordered manner. Then, non-woven fabric is attached to the surface to form the mesh, and finally the mesh is cut and packaged.

[0016] Technical effects and advantages of the present invention: 1. In the present invention, the prepared material has many excellent properties: fine fiber fineness, fluffy structure, large surface area and cross-sectional density. At the same time, the material also shows good softness and excellent elasticity. Based on the above characteristics, the sound-absorbing and heat-insulating materials made of it as raw material have significantly improved sound absorption and heat insulation effects.

[0017] 2. The present invention coordinates the arrangement of a rotating barrel, a fixed shaft, a control plate, a stirring plate, and a contact plate. Through the rotation of the stirring plate, the inner layer material of the extruder barrel and the outer layer material are driven to fully exchange, so that the material in the extruder barrel is turned inside and outside in all directions. In this process, the material between the inner wall of the extruder barrel and the outer wall of the rotating barrel is turned and exchanged, so that each part of the material in the extruder barrel can be heated evenly, effectively avoiding the problem of uneven heating of the material, and can effectively guarantee the extrusion quality of the screw extrusion assembly and ensure that the surface of the output product is smooth.

[0018] 3. The present invention cooperates with the brake plate, the feedback plate, the vertical groove, the slide groove, the slide plate and the fourth spring. When the material in a certain interval is agglomerated, the resistance encountered by the stirring plate in the interval during the stirring operation will increase significantly. The change in resistance will produce a chain reaction, causing the rotation speed of the stirring plates adjacent to the interval to slow down. When the stirring plates in the adjacent intervals temporarily stop rotating, they will block the advancement of the material in the extruder. This blocking effect delays the pushing process of the material in the interval where the current agglomerated material is located to the next heating interval. The material can have more sufficient time to be heated in a certain interval, so that the material is fully plasticized, thereby effectively reducing the agglomeration of the material and ensuring the processing quality of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a process flow chart of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 3 It is a full cross-sectional top view of the extrusion barrel of the present invention.

[0022] Figure 4 For the present invention Figure 3 A is an enlarged view of the middle image.

[0023] Figure 5 This is an exploded view of the extrusion cylinder and the rotating cylinder of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the rotating drum and the passing groove of the present invention.

[0025] Figure 7 It is a schematic diagram of the structure of the control plate, the slide plate, the stirring plate and the contact plate of the present invention.

[0026] Figure 8 It is a schematic structural diagram of the fixed shaft and the first cam of the present invention.

[0027] Fig. 9 It is a schematic structural diagram of the fixed shaft, the second cam and the torsion spring of the present invention.

[0028] Fig.10 It is a cutaway front view of the control panel of the present invention.

[0029] Fig.11 For the present invention Fig.10 Enlarged view of B.

[0030] Fig.12 The present invention is a schematic structural diagram of a stirring plate, a rotating shaft, a rotating rod, a guide column, a wedge block and a guide plate.

[0031] The reference numerals are: 1, screw extrusion assembly; 11, support frame; 12, extrusion barrel; 13, feeding assembly; 14, heating assembly; 15, rotating barrel; 16, auger; 17, control board; 18, stirring plate; 19, reducer; 110, motor; 111, transmission shaft; 112, fixed shaft; 113, first cam; 114, second cam; 115, torsion spring; 116, through slot; 117, first spring; 118, contact plate; 119, baffle; 1 20. Second spring; 121. Give way groove; 122. Rotating shaft; 123. Rotating rod; 124. Guide column; 125. Push rod; 126. Horizontal groove; 127. Wedge block; 128. Third spring; 129. Guide plate; 130. Slide groove; 131. Slide plate; 132. Fourth spring; 133. Feedback plate; 134. Brake plate; 135. Vertical groove; 2. Hydraulic screen filter; 3. Metering pump; 4. Extrusion die; 5. High-pressure fan; 6. Net curtain. DETAILED DESCRIPTION

[0032] The following will be combined with the 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1 During the operation of the screw extruder assembly, the material falls into the extrusion barrel and then undergoes a series of treatments such as stirring, crushing and heating in the extrusion barrel. In the prior art, the reciprocating rotation of the electric heating sleeve and the heating plate in the heating mechanism is used to uniformly heat and plasticize the material in the extrusion barrel to ensure the quality of the subsequent extruded products. However, the actual situation is that the material falling into the extrusion barrel will produce stratification in the barrel due to the influence of gravity. The material close to the outer ring of the extrusion barrel can absorb more heat and thus be fully melted; but as the distance from the side wall of the extrusion barrel increases, the heat absorbed by the material gradually decreases, which leads to inconsistent heating of the material in the inner and outer rings of the extrusion barrel, which in turn has an adverse effect on the extrusion quality of the material, resulting in an uneven surface of the extruded product and defective and unqualified products.

[0034] See also Figures 2 to 12 As shown, the screw extrusion assembly 1 includes a support frame 11, a top of the support frame 11 is fixedly connected to an extrusion barrel 12, a top of the extrusion barrel 12 is connected to a feeding assembly 13, a plurality of heating assemblies 14 are arranged on the outer edge surface of the extrusion barrel 12 and are evenly distributed along its length direction, a rotatable rotating barrel 15 is arranged in the extrusion barrel 12, a screw dragon 16 is arranged on the outer edge surface of the rotating barrel 15, a plurality of control panels 17 are evenly distributed in the rotating barrel 15 along its length direction, the control panel 17 can extend out of the outer wall of the rotating barrel 15, a stirring plate 18 for stirring the material is hinged in the control panel 17, when the stirring plate 18 encounters agglomerated materials during the stirring process, the stirring plate 18 adjacent to it (the stirring plate 18 adjacent to it refers to the stirring plate 18 adjacent to the current stirring plate 18 in the direction away from the feeding assembly 13) can be controlled to delay stirring, the extrusion barrel 12 is blocked, and the heating time of the material agglomeration interval is extended.

[0035] See also Figure 2 As shown, a reducer 19 is provided on the support frame 11 , and a motor 110 is provided on the support frame 11 . The output end of the motor 110 is connected to the reducer 19 , and the output end of the extruder cylinder 12 is connected to the reducer 19 via a transmission shaft 111 . The reducer 19 can control the rotation of the rotating cylinder 15 .

[0036] See also Figure 3 , Figure 4 , Figure 8 and Fig. 9 As shown, a fixed shaft 112 is coaxially fixedly connected inside the extruder barrel 12, a first cam 113 is fixedly connected to the side of the fixed shaft 112 close to the feed assembly 13, a plurality of second cams 114 are rotatably connected to the side of the fixed shaft 112 away from the feed assembly 13, a circular groove is formed on the second cam 114, and the circular groove is connected to the fixed shaft 112 via a torsion spring 115.

[0037] See also Figures 2 to 9 As shown, a fixed shaft 112 is coaxially fixedly connected inside the extruder barrel 12, a first cam 113 is fixedly connected to the side of the fixed shaft 112 close to the feed assembly 13, a plurality of second cams 114 are rotatably connected to the side of the fixed shaft 112 away from the feed assembly 13, a circular groove is formed on the second cam 114, and the circular groove is connected to the fixed shaft 112 via a torsion spring 115.

[0038] See also Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, a plurality of through slots 116 corresponding to the control plate 17 are provided on the side wall of the rotating drum 15, and the control plate 17 is slidably connected to the through slots 116 on the corresponding side. The end of the control plate 17 close to the center of the rotating drum 15 is connected to a contact plate 118 via a plurality of first springs 117, and the end of the contact plate 118 close to the center of the rotating drum 15 contacts the first cam 113 or the second cam 114 on the corresponding side. A baffle 119 is fixedly connected to the side wall of the control plate 17, and the top of the baffle 119 is connected to the inner wall of the rotating drum 15 via a plurality of second springs 120.

[0039] See also Fig.10 , Fig.11 and Fig.12 As shown, a clearance groove 121 is provided at one end of the control plate 17 close to the feed assembly 13, and the stirring plate 18 is rotatably connected to the control plate 17 through a rotating shaft 122. The end of the rotating shaft 122 close to the feed assembly 13 extends into the clearance groove 121, and the end of the rotating shaft 122 located in the clearance groove 121 is fixedly connected to two rotating rods 123, and a guide column 124 is provided at one end of the rotating rod 123 close to the feed assembly 13.

[0040] See also Figures 10 to 12 As shown, a push rod 125 is provided at one end of the contact plate 118 close to the feed assembly 13, and the end of the push rod 125 close to the side wall of the rotating drum 15 extends into the give way groove 121. A transverse groove 126 located in the give way groove 121 is opened on the push rod 125, and a wedge block 127 is slidably connected in the transverse groove 126. The end of the wedge block 127 close to the rotating shaft 122 is an inclined surface, and the length of the end of the wedge block 127 close to the push rod 125 is less than the length of the end of the wedge block 127 away from the push rod 125. The wedge block 127 can contact with the guide column 124, and the end of the wedge block 127 close to the feed assembly 13 is connected to the side wall of the give way groove 121 via a third spring 128. Two guide plates 129 are provided on the side of the wedge block 127 close to the rotating shaft 122.

[0041] In actual use, the initial state is that the upper end surface of the wedge block 127 is located below the guide column 124 on the lower side, and the elastic force of the first spring 117 is set to be greater than the elastic force of the second spring 120. The material falls into the extrusion barrel 12 through the feeding assembly 13, and the material is located between the extrusion barrel 12 and the rotating drum 15. As the motor 110 drives the rotating drum 15 to rotate through the reducer 19, the rotating drum 15 drives the auger 16 to rotate, and the auger 16 pushes the material in the extrusion barrel 12 to move in the direction away from the feeding assembly 13. When the rotating drum 15 rotates, it can drive multiple control boards 17 to rotate synchronously. The control board 17 drives the receiving The contact plate 118 rotates, and the contact plate 118 rotates relative to the fixed shaft 112 and the first cam 113 or the second cam 114. The contact plate 118 moves in a direction away from the center of the rotating drum 15 under the push of the first cam 113 or the second cam 114 and compresses the second spring 120, so that the control plate 17 extends out of the through slot 116 on its corresponding side. The control plate 17 drives the stirring plate 18 and the slide plate 131 to extend out of the rotating drum 15. At this time, the stirring plate 18 is located between the rotating drum 15 and the extrusion drum 12. During the movement of the control plate 17 in the direction away from the center of the rotating drum 15, the material in the inner circle of the extrusion drum 12 is disrupted.

[0042] As the contact plate 118 rotates relative to the first cam 113 or the second cam 114, the control plate 17 gradually moves in a direction away from the center of the rotating cylinder 15. When the control plate 17 contacts the inner wall of the extruder cylinder 12, as the first cam 113 or the second cam 114 continues to push the contact plate 118 to move in a direction away from the center of the rotating cylinder 15, the contact plate 118 moves relative to the control plate 17 on its corresponding side, so that the second spring 120 is compressed, and the contact plate 118 drives the push rod 125 on its corresponding side to move in a direction away from the center of the rotating cylinder 15. The push rod 125 drives the wedge block 127 to move in a direction away from the center of the rotating cylinder 15, and the wedge block 127 drives the guide plate 129 to push the guide plate 129 The movement of the column 124 in the direction away from the center of the rotating drum 15 causes the guide column 124 to drive the rotating shaft 122 to rotate via the rotating rod 123, and the rotating shaft 122 drives the stirring plate 18 to rotate. The stirring plate 18 stirs and turns the material between the outer wall of the rotating drum 15 and the inner wall of the extrusion cylinder 12. When the wedge block 127 drives the guide column 124 to move to the extreme position in the direction away from the center of the rotating drum 15, the rotating shaft 122 rotates 180 degrees, and the stirring plate 18 drives the inner layer of material to exchange with the outer layer, so that the material in the extrusion cylinder 12 is turned inside out, and the material between the inner wall of the extrusion cylinder 12 and the outer wall of the rotating drum 15 is turned back and forth, so that the material in the extrusion cylinder 12 is heated more evenly, and uneven heating of the material in the extrusion cylinder 12 is avoided.

[0043] As the drum 15 rotates, the drum 15 drives the control plate 17 to rotate, and the control plate 17 drives the contact plate 118 to rotate via the second spring 120. When the effective pushing diameter of the first cam 113 or the second cam 114 decreases, since the elastic force of the second spring 120 is greater than the elastic force of the first spring 117, the contact plate 118 moves toward the center of the drum 15 under the action of the second spring 120. At this time, the control plate 17 does not move, and the contact plate 118 drives the push rod 125 to move relative to the control plate 17 toward the center of the drum 15. The push rod 125 drives the wedge block 127 and the guide plate 129 to move relative to the rotating shaft 122 and the guide column 124. The rotating drum 15 moves in a circular direction. When the contact plate 118 moves to an initial position relative to the control plate 17, the wedge block 127 moves to an extreme position in the clearance groove 121 toward the center of the rotating drum 15. During this process, the lower end surface of the wedge block 127 contacts the guide column 124 at one end of the center of the rotating drum 15. The guide column 124 pushes the wedge block 127 to move away from the guide column 124 and compresses the third spring 128. When the wedge block 127 moves to an initial position relative to the clearance groove 121, the wedge block 127 is disengaged from the guide column 124, and the wedge block 127 is reset under the action of the third spring 128, completing a flipping cycle.

[0044] Embodiment 2 On the basis of the above embodiments, during the implementation of the meltblowing process, it is necessary to divide the operation into multiple heating areas. When the material is heated unevenly in the extruder barrel, the screw extrusion assembly always keeps pushing the material, and the material will clump due to the uneven heating. These agglomerated materials continue to move forward under the continuous advancement of the screw extrusion assembly, and the current heating interval cannot identify the agglomerated materials, and it is impossible to extend the heating time in a targeted manner. Ultimately, the material agglomeration problem will have a negative impact on the extrusion quality of the screw extrusion assembly, resulting in product quality that is difficult to meet the expected standards.

[0045] See also Figure 3 , Figure 4 and Figure 7 As shown, a slide groove 130 is opened at one end of the control plate 17 away from the feed component 13, and a slide plate 131 is slidably connected in the slide groove 130. The end of the slide plate 131 away from the feed component 13 contacts the side wall of the slide groove 130 through the fourth spring 132, and the end of the slide plate 131 close to the feed component 13 contacts the stirring plate 18. The end of the slide plate 131 away from the feed component 13 is fixedly connected to a feedback plate 133.

[0046] See also Figure 3 , Figure 4 and Figure 7As shown, one end of the feedback plate 133 away from the feed assembly 13 passes through the control plate 17, and a plurality of brake plates 134 corresponding to the control plate 17 are slidably connected in the drum 15. The brake plate 134 is provided with a vertical groove 135 opening toward the feed assembly 13. The feedback plate 133 is slidably connected to the vertical groove 135, and the side of the brake plate 134 away from the feed assembly 13 can contact the second cam 114 adjacent to it.

[0047] See also Fig.12 As shown, the two longer end surfaces of the stirring plate 18 are inclined surfaces, and the thickness of the end of the stirring plate 18 close to the feeding assembly 13 is less than the thickness of the end of the stirring plate 18 away from the feeding assembly 13.

[0048] On the basis of the above embodiment, when the material in one of the heating intervals is agglomerated, the stirring plate 18 will encounter greater resistance when stirring. Since the two longer end surfaces of the stirring plate 18 are inclined surfaces, the thickness of the end of the stirring plate 18 close to the feeding assembly 13 is less than the thickness of the end of the stirring plate 18 away from the feeding assembly 13. When the stirring plate 18 rotates, the material resistance acts on the inclined surface of the stirring plate 18. According to Newton's third law, the force generated by the resistance on the stirring plate 18 is in the direction away from the feeding assembly 13. That is, when the material in a certain interval is agglomerated, due to the large resistance, the stirring plate 18 in the certain interval moves in the direction away from the feeding assembly 13. The stirring plate 18 drives the slide plate 131 on its corresponding side to move in the direction away from the feeding assembly 13 and compresses the fourth spring 132. The slide plate 131 drives the feedback plate 133 to move in the direction away from the feeding assembly 13. The feedback plate 133 pushes the brake plate 134 on its corresponding side to move in the direction away from the feeding assembly 13, so that the brake plate 1 34 gradually approaches the second cam 114 adjacent to it, so that the brake plate 134 contacts the second cam 114, and the friction force on the second cam 114 increases. When the second cam 114 rotates relative to the contact plate 118 on its corresponding side, due to the increased friction force on the second cam 114, when the second cam 114 rotates relative to the contact plate 118, the second cam 114 rotates relative to the fixed shaft 112, so that the torsion spring 115 is stretched. When the torsion spring 115 is stretched to a certain amount, the second cam 114 can push the contact plate 118 on its corresponding side to move. Due to the agglomeration of materials in a certain interval, the resistance of the stirring plate 18 in a certain interval increases when stirring, so that the stirring plate 18 in the adjacent interval is delayed in rotation. When the stirring plate 18 in the adjacent interval does not rotate, it can block the advancement of the material in the extruder 12, so that the material in a certain interval is delayed in being pushed into the next heating interval, so that the heating effect of the material is better, and the agglomeration of the material can be effectively reduced.

[0049] The present application can enable the stirring plate 18 to drive the inner layer material to complete the exchange with the outer layer, so that the material in the extruder barrel 12 can be turned inside out, and the material between the inner wall of the extruder barrel 12 and the outer wall of the rotating barrel 15 can be turned back and forth to exchange, so that the material in the extruder barrel 12 is heated more evenly, and uneven heating of the material in the extruder barrel 12 is avoided. When the material in a certain interval is agglomerated, the resistance of the stirring plate 18 in a certain interval increases when stirring, so that the stirring plate 18 in the adjacent interval is delayed to rotate. When the stirring plate 18 in the adjacent interval does not rotate, it can block the advancement of the material in the extruder barrel 12, so that the material in a certain interval is delayed from being pushed into the next heating interval, so that the heating effect of the material is better, and the agglomeration of the material can be effectively reduced.

[0050] Embodiment 3 like Figure 1 As shown, in order to increase the sound absorption and heat insulation effect, this embodiment provides a method for preparing a YDB sound absorption and heat insulation material, comprising the following steps: S1. Melt extrusion: using screw extrusion assembly 1, set the motor power to 18.6kW, the motor speed to 1470r / min, the melt index to 1500, and heat in five zones, namely, zone 1 heating temperature of 180°C, zone 2 heating temperature of 200°C, zone 3 heating temperature of 220°C, zone 4 heating temperature of 240°C, zone 5 heating temperature of 250°C; S2. Filtration: The hydraulic filter 2 is used for filtration to ensure that the purity of the melt reaches 99.8% to ensure the smooth spinning. The filter screen uses a 300-mesh high-mesh filter screen. The melt pressure after filtration is maintained at about 3 kg, and the filter heating temperature is 250°C; S3. Metering: The metering pump 3 is 60cc, and the melt flow rate is adjusted to control the product weight. The heating temperature of the metering pump 3 is 230°C; S4. Fiber formation: using an extrusion die 4, the die is divided into eight heating zones. Since the fluidity of the melt is related to the temperature, the flow rate of the melt in the zone is adjusted by controlling the temperature of each zone. The temperature on both sides of the extrusion die 4 is high, about 250°C, while the temperature in the middle is low, about 200°C, so that the plastic melt from the screw extrusion assembly 1 is well distributed in the flow channel of the extrusion die 4, and is extruded and formed from the spinneret of the die at a uniform speed. The number of holes in the spinneret is 2319, the hole pitch is 3 mm, and the hole diameter is 0.30 mm; S5. Stretching: Using a high-pressure blower 5, the heated high-pressure airflow is blown downward along both sides of the spinneret, the high-pressure airflow has a temperature of 320°C and a pressure of about 2 kg, until the fiber is stretched and elongated to complete the stretching process; S6. Cooling: After the melt and polyester staple fibers are mixed and stuck together, they are allowed to cool naturally by adjusting the height of the mesh curtain 6 and the extrusion die 4. The height of the mesh curtain 6 and the extrusion die 4 is controlled between 40cm and 60cm. After the mesh is formed, the polyester staple fibers are filled and mixed in a disordered manner. Then, a non-woven fabric is attached to the surface to form the mesh, and finally the mesh is cut and packaged.

[0051] In this embodiment, the prepared material has many excellent properties: fine fiber fineness, fluffy structure, large surface area and cross-sectional density. At the same time, the material also exhibits good softness and excellent elasticity. Based on the above characteristics, the sound-absorbing and heat-insulating material made with it as raw material has significantly improved sound absorption and heat insulation effects.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A preparation device for YDB sound-absorbing and heat-insulating materials, comprising a screw extrusion assembly, characterized in that: The screw extrusion assembly includes a support frame, the top of the support frame is fixedly connected to an extrusion barrel, the top of the extrusion barrel is connected to a feeding assembly, a plurality of heating assemblies are arranged on the outer edge surface of the extrusion barrel and are evenly distributed along its length direction, a rotatable rotating barrel is arranged in the extrusion barrel, an auger is arranged on the outer edge surface of the rotating barrel, a plurality of control panels are evenly distributed in the rotating barrel along its length direction, the control panel can extend out of the outer wall of the rotating barrel, a stirring plate for stirring the material is hinged in the control panel, and when the stirring plate encounters agglomerated material during stirring, the stirring plate adjacent to the stirring plate can be controlled to delay stirring, thereby completing the blocking of the extrusion barrel and extending the heating time of the agglomeration interval of the material.

2. The preparation device of YDB sound-absorbing and heat-insulating material according to claim 1 is characterized in that: The support frame is provided with a reducer, the support frame is provided with a motor, the output end of the motor is connected to the reducer, the output end of the extruder cylinder is connected to the reducer via a transmission shaft, and the reducer can control the rotation of the rotating cylinder.

3. The preparation device of YDB sound-absorbing and heat-insulating material according to claim 2 is characterized in that: A fixed shaft is coaxially fixedly connected inside the extruder, a first cam is fixedly connected to a side of the fixed shaft close to the feed assembly, a plurality of second cams are rotatably connected to a side of the fixed shaft away from the feed assembly, a circular groove is formed on the second cam, and the circular groove is connected to the fixed shaft via a torsion spring.

4. The preparation device of the YDB sound-absorbing and heat-insulating material according to claim 3 is characterized in that: The side wall of the rotating drum is provided with a plurality of through grooves corresponding to the control plate one by one, the control plate is slidably connected to the through grooves on the corresponding side, one end of the control plate close to the center of the rotating drum is connected to a contact plate via a plurality of first springs, one end of the contact plate close to the center of the rotating drum contacts the first cam or the second cam on the corresponding side, a baffle is fixedly connected to the side wall of the control plate, and the top of the baffle is connected to the inner wall of the rotating drum via a plurality of second springs.

5. The preparation device of YDB sound-absorbing and heat-insulating material according to claim 4 is characterized in that: A clearance groove is provided at one end of the control plate close to the feed component, and the stirring plate is rotatably connected to the control plate through a rotating shaft, and the end of the rotating shaft close to the feed component extends into the clearance groove. Two rotating rods are fixedly connected to one end of the rotating shaft located in the clearance groove, and a guide column is provided at one end of the rotating rod close to the feed component.

6. The preparation device of YDB sound-absorbing and heat-insulating material according to claim 5, characterized in that: A push rod is provided at one end of the contact plate close to the feed assembly, and one end of the push rod close to the side wall of the rotating drum extends into the give way groove. A transverse groove located in the give way groove is opened on the push rod, and a wedge block is slidably connected in the transverse groove. The end of the wedge block close to the rotating shaft is an inclined surface, and the wedge block can contact with the guide column. The end of the wedge block close to the feed assembly is connected to the side wall of the give way groove via a third spring, and two guide plates are provided on the side of the wedge block close to the rotating shaft.

7. The preparation device of YDB sound-absorbing and heat-insulating material according to claim 6, characterized in that: A slide groove is provided at one end of the control plate away from the feeding component, a slide plate is slidably connected in the slide groove, the end of the slide plate away from the feeding component contacts the side wall of the slide groove via a fourth spring, the end of the slide plate close to the feeding component contacts the stirring plate, and the end of the slide plate away from the feeding component is fixedly connected to a feedback plate.

8. The preparation device of YDB sound-absorbing and heat-insulating material according to claim 7, characterized in that: One end of the feedback plate away from the feed assembly passes through the control plate, and a plurality of brake plates corresponding to the control plate are slidably connected in the rotating drum. A vertical groove with an opening toward the feed assembly is provided on the brake plate, and the feedback plate is slidably connected to the vertical groove. The side of the brake plate away from the feed assembly can contact the second cam adjacent to it.

9. The preparation device of YDB sound-absorbing and heat-insulating material according to claim 8, characterized in that: The two longer end surfaces of the stirring plate are inclined surfaces respectively, and the thickness of the end of the stirring plate close to the feeding component is smaller than the thickness of the end of the stirring plate away from the feeding component.

10. A method for preparing a YDB sound-absorbing and heat-insulating material, the method using the YDB sound-absorbing and heat-insulating material preparation device according to claim 9, characterized in that: The preparation method comprises the following steps: S1. Melt extrusion: using a screw extrusion assembly, heating in five zones, with a heating temperature of 180°C in zone 1, 200°C in zone 2, 220°C in zone 3, 240°C in zone 4, and 250°C in zone 5; S2. Filtration: Use hydraulic screen filter to filter to ensure the purity of the melt reaches 99.8%; S3. Metering: Use a metering pump to adjust the melt flow rate to control the product weight; S4. Fiber formation: Using an extrusion die, the flow rate of the melt in each zone is adjusted by controlling the temperature of each zone, so that the plastic melt from the screw extrusion assembly is well distributed in the flow channel of the extrusion die, and is extruded and formed from the spinneret of the die at a uniform speed; S5. Stretching: Use a high-pressure fan to blow the heated high-pressure airflow downward along both sides of the spinneret until the fiber filaments are stretched and elongated, completing the stretching process; S6. Cooling: After the melt and polyester staple fibers are mixed and stuck together, they are allowed to cool naturally by adjusting the height of the web curtain and the extrusion die head. After forming the web, the polyester staple fibers are filled and mixed in a disordered manner. After that, non-woven fabric is attached to the surface to form the web, and finally the web is cut and packaged.

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