CN107351184B - Hot-melt type damping sheet cooling and punching device and production method thereof - Google Patents

Hot-melt type damping sheet cooling and punching device and production method thereof Download PDF

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Publication number
CN107351184B
CN107351184B CN201710751732.8A CN201710751732A CN107351184B CN 107351184 B CN107351184 B CN 107351184B CN 201710751732 A CN201710751732 A CN 201710751732A CN 107351184 B CN107351184 B CN 107351184B
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damping sheet
hot
type damping
punching
melt type
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CN107351184A (en
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刘福
潘乐
窦正平
傅昌宏
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MAANSHAN LIANHONG SYNTHETIC MATERIALS CO Ltd
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MAANSHAN LIANHONG SYNTHETIC MATERIALS CO Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0625—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by endless conveyors, e.g. belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/26—Bituminous materials, e.g. tar, pitch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D1/00—Devices using naturally cold air or cold water
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Forests & Forestry (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention discloses a hot-melt type damping sheet cooling and punching device and a production method thereof, and belongs to the technical field of automobile damping. The hot-melt type damping sheet cooling and punching device comprises an air cooling mechanism, a punching and cutting device body and a special conveying belt for conveying the hot-melt type damping sheet through the punching and cutting device body; the air cooling mechanism comprises an air cooling box, an air blower and an air cooling conveying belt; a blower is fixed in the air cooling box and is buckled right above the air cooling conveyer belt; the tail end of the air-cooled conveyer belt is connected with the special conveyer belt through the hot-melt type damping sheet in the conveying process, and the hot-melt type damping sheet is transferred to the special conveyer belt; the punching and cutting device body comprises a supporting table on two sides of the special conveying belt, a punching table horizontally arranged and fixed on the side surfaces of the two supporting tables and a lifting type height adjusting mechanism; the stamping table is connected with a detachably mounted cutting die at the bottom of the stamping table through a lifting type height adjusting mechanism. The invention solves the problems of serious burrs and short service life of the conveyer belt when the hot melt type damping sheet is cut.

Description

Hot-melt type damping sheet cooling and punching device and production method thereof
Technical Field
The invention relates to the technical field of automobile damping, in particular to a hot-melt type damping sheet cooling and punching device and a production method thereof.
Background
Vibration damping materials are widely used in automotive applications to attenuate highway noise and engine vibration and sound. For the damping material, a viscoelastic material is preferable. The damping effect associated with the energy dissipated in the viscoelastic material increases with the young's modulus and the loss tangent of the viscoelastic material. It also increases, of course, with the deformation to which the material is subjected. Some materials have a high loss factor but low young's modulus, which provides limited damping to the metal plate, others have a high young's modulus but lower loss factor (e.g., rubber), which is also not very good for use as a damping member. Good damping materials provide a compromise between young's modulus and loss tangent.
For hot-melt type damping sheets made of good damping materials, an adaptive cooling and punching cutting device is needed, because the damping sheets cut by a common cutting device often have burrs, and when the damping sheets with good viscoelasticity are cut, the belt is often damaged to influence the service life of the damping sheets.
Through searching, chinese patent application, application number: 201410175388.9, publication date: 2015.11.18 an automatic film punching device comprises a frame, a feeding mechanism and a punching mechanism which are sequentially arranged on the frame; the punching mechanism comprises a blanking die holder positioned at one end of the feeding direction of the feeding mechanism, a blanking plate overlapped above the blanking die holder, and a punch head arranged above the blanking plate in a vertically movable manner relative to the blanking plate, wherein the blanking plate is provided with a blanking hole corresponding to the punch head, the blanking die holder is provided with a blanking hole communicated with the blanking hole, and a guide groove which is parallel to the feeding direction of the feeding mechanism and penetrates through the blanking plate and two opposite sides of the blanking die holder and used for a film to pass through is arranged between the blanking plate and the blanking die holder. According to the automatic film punching device, the film is punched by matching the punch with the feeding mechanism, so that the existing cutter and manual operation are replaced, automatic production is realized, labor cost is reduced, production efficiency is improved, and safety is realized; and the stripper plate is arranged on the blanking die holder and does not move along with the up-and-down movement of the punch, so that the noise of the punching device is reduced. However, when the invention is applied to punching thicker damping sheets, the rough edges are serious during punching due to lack of adjustment of width, height and even thickness, and even the blocking condition is serious due to insufficient punching.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the problems of serious burrs and short service life of a conveyer belt when cutting damping sheets with special requirements in the prior art, the invention provides a hot-melt type damping sheet cooling and punching device and a production method thereof. The method achieves the purpose of no burr when the hot-melt type damping sheet is cut through the omnibearing adaptive adjustment of the cutting die.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a hot-melt type damping sheet cooling and punching device comprises an air cooling mechanism, a punching and cutting device body and a special conveying belt which passes through the punching and cutting device body and conveys the hot-melt type damping sheet; wherein: the air cooling mechanism comprises an air cooling box, an air blower and an air cooling conveying belt; a blower is fixed in the air cooling box and is buckled right above the air cooling conveyer belt; the tail end of the air-cooled conveyer belt is connected with the special conveyer belt through the hot-melt type damping sheet in the conveying process, and the hot-melt type damping sheet is transferred to the special conveyer belt; the hot-melt type damping sheet is die-cut after being cooled by an air cooling mechanism, so that the adhesion of the hot-melt type damping sheet to a blade during die cutting is reduced, and burrs are avoided as much as possible; the punching and cutting device body comprises two supporting tables on two sides of the special conveying belt, a punching table horizontally arranged and fixed on the side surfaces of the two supporting tables and a lifting type height adjusting mechanism; the punching table is connected with a detachably mounted cutting die at the bottom of the punching table through a lifting type height adjusting mechanism. The height and thickness of the cutting die are adaptively adjusted through the lifting type height adjusting mechanism, and after the hot-melt type damping sheet is acted, the lifting stroke can be shortened, and the damage to the conveying belt caused by excessive cutting is avoided.
According to the technical scheme, the upper part of the air cooling box is an open opening, and a separation net is fixedly connected in the opening to prevent foreign matters from falling into the blower; the wind direction of the blower directly blows the hot-melt type damping sheet downwards, and ensures the firmness of the hot-baking coating film when cooling; the lifting height adjusting mechanisms are 4 lifting screws symmetrically arranged at four corners of the stamping table, and lifting can be adjusted in a four-corner balance mode so as to ensure the balance of the stamping surface; the bottom of the front end of the special conveying belt is provided with a damping piece sensing mechanism, and when no damping piece exists, the control mechanism can be informed to stop punching, so that the conveying belt is prevented from being damaged by blank cutting of the cutting die.
Further technical scheme still includes setting up respectively in the front and back both sides of punching press platform, and 2 cutting die width adjustment mechanism directly over the special conveyer belt carry out corresponding adjustment according to the cutting die specification, improves the commonality of device.
According to a further technical scheme, the cutter die width adjusting mechanism comprises an air cylinder, a screw rod, a ball type width adjusting frame, a positioning frame, a cutter die bearing fixing frame and screw hole blocks, wherein the ball type width adjusting frame is fixed on the side face of the stamping table; the screw rod passes through the ball type width adjusting frame, extends from the ball type width adjusting frame to the left and right ends by taking the ball type width adjusting frame as the center, and the threads of the left and right parts are reversely arranged, and the two ends of the screw rod respectively pass through respective screw hole blocks; each screw hole block is fixed in the corresponding cutter die supporting and fixing frame; the positioning frame is in a downward opening frame shape, the upper part of the fixing frame is connected with the cutting die in a reverse buckling mode, the air cylinder is arranged above the positioning frame, the telescopic rod in the air cylinder penetrates through the positioning frame and the cutting die to be connected with the fixing frame and then acts on the screw hole block, the whole cutting die width adjusting mechanism is convenient to operate and accurate in positioning, the cutting die is positioned and fixed in an omnibearing mode, burrs are reduced as much as possible during punching, and damage of the cutting blade to the conveying belt is further avoided.
According to the technical scheme, the bottom of the fixing frame is supported by the cutting die, the clamping groove for clamping the cutting die is formed in the fixing frame, clamping of the cutting die is facilitated, and replacement of the cutting die is more convenient; the special conveyer belt has a breaking strength of more than 20Mpa and a breaking elongation of more than 400%, and is suitable for the hot-melt type damping sheet.
The production method of the hot-melt type damping sheet cooling and punching device is characterized by comprising the following steps of:
step one, a cutting die is put in: the cutter mould is arranged between two opposite 4 cutter mould bearing fixing frames;
step two, width adjustment: rotating a round handle of the ball type width adjusting frame, and driving the cutter die to carry the fixing frame to move in opposite directions by a screw rod with opposite threads at two ends until two side ends of the cutter die are clamped;
step three, starting the air cylinder: starting the air cylinder, and driving the cutting die to bear the fixed frame to ascend by the air cylinder telescopic rod until the upper surface of the cutting die is tightly contacted with the bottom end of the lifting screw;
step four, thickness adjustment: adjusting the thickness of the cut thermal-melting type damping sheet by rotating the lifting screw;
step five, cooling: after the hot-melt type damping sheet is coated and shaped by hot baking, the hot-melt type damping sheet is transferred into an air cooling box through an air cooling conveyer belt, a blower is started, and in the conveying process, the hot-melt type damping sheet is subjected to air cooling;
Step six, transferring: the air-cooled conveyer belt conveys the hot-melt type damping sheet to a special conveyer belt;
step seven, starting a special conveying belt: starting a special conveying belt to bring the hot-melt type damping sheet below the cutting die;
step eight, starting the punching and cutting device body: the punching and cutting device body is used for punching the hot-melt damping sheet into a single damping sheet by setting up the upper and lower punching frequencies through the numerical control cabinet and the special conveying speed of the conveying belt.
According to a further technical scheme, the ingredients of the hot-melt type damping sheet comprise 600-700 parts by weight of calcium powder, 70-80 parts by weight of mica powder, 60-80 parts by weight of asphalt, 8-10 parts by weight of asphalt modifier, 4-8 parts by weight of softener and 3-5 parts by weight of fiber; the calcium powder comprises heavy calcium powder and light calcium powder, wherein the heavy calcium powder and the light calcium powder are ultrafine heavy calcium powder and ultrafine light calcium powder with particle diameters of 0.5-1 mu m, and the proportion relation is as follows: (3-5): 1. in the ingredients, the consumption of asphalt is only less than 9%, and when the asphalt is applied to an automobile, the generation of harmful gas is greatly reduced, ventilation is carried out for a period of time after application, and most of residual odor is removed, so that the use risk of the damping plate is reduced; the two superfine calcium powders are matched with the softened asphalt for use, so that the bonding strength between the superfine calcium powders and the asphalt (the bonding force between the superfine calcium powders and the asphalt is improved through the polymerization capability of the superfine powder) can be improved, and layering in the use process after tabletting is avoided.
According to a further technical scheme, the preparation steps of the superfine heavy calcium powder are as follows:
step one, rough grinding: firstly, mechanically crushing calcite, and then, conveying the crushed calcite into a grinding machine for grinding to obtain coarse calcium carbonate powder;
step two, mixing: fully mixing coarse calcium carbonate powder, a dispersing agent and water to obtain a freeze-dried precursor;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse for quick-freezing into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
step five, fine grinding: feeding the honeycomb block material into a grinder for fine grinding to superfine heavy calcium powder;
the preparation method of the superfine light calcium powder comprises the following steps:
step one, reactant generation: performing double decomposition reaction on sodium carbonate and calcium chloride to generate calcium carbonate precipitate, and filtering to obtain calcium carbonate coarse powder;
step two, mixing: fully mixing coarse calcium carbonate powder, a dispersing agent and water to obtain a freeze-dried precursor;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse for quick-freezing into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine light calcium powder.
The superfine heavy calcium powder and the light calcium powder manufactured by the vacuum freeze-drying process can be in a light and brittle honeycomb structure due to small particles and formed block bodies, so that the grinding cost is reduced for manufacturing the superfine calcium powder.
According to a further technical scheme, the quick-freezing temperature is-38 to-40 ℃; the freeze-drying process curve is as follows:
A. heating period: the plate temperature is 0 ℃ to 100 ℃, the heating slope is 5 ℃/min, the temperature is kept at 100 ℃ for 20 minutes to 30 minutes, and the vacuum is pumped to be within 100 Pa;
B. and (3) heat preservation period: the temperature of the plate is reduced to 80-85 ℃/min, the temperature is kept for 30-40 min, and the vacuum is controlled within 80 Pa;
C. later stage: the temperature of the plate is reduced to 60-70 ℃/min, the temperature is kept for 40-60 min, and the vacuum is controlled within 50 Pa.
According to a further technical scheme, in the second step of the preparation of the superfine light calcium powder and the preparation of the superfine heavy calcium powder, an asphalt modifier and/or a softener are uniformly mixed and then quickly frozen, each component is quickly positioned, layering is avoided, the water adding amount is 2.5-3.0 times of the total weight of coarse powder, the purpose of fully absorbing and mixing is achieved, the thickness of a material laid into a mould in the third step is 5.0-6.0 cm, the tray loading amount is improved, and in the fourth step, the temperature of a cold trap is controlled below-30 ℃ in the freeze-drying process, so that the purpose of effectively capturing water can be achieved; the processing method of the hot-melt type damping sheet comprises the following steps of:
(1) Asphalt softening: putting asphalt into a kneader, heating, softening and stirring to form fluid;
(2) Stirring: sequentially adding an asphalt modifier and a softener into a kneader in sequence for stirring;
(3) Breaking fibers: in the stirring process of the step (2), crushing the fibers, and then putting the crushed fibers into a kneader for continuous stirring;
(4) Adding calcium powder: adding the calcium powder and the mica powder into a kneader for continuous stirring;
(5) Extrusion: after the stirring is finished, the mixture is transferred into an extruder for extrusion, and a pair-roller pressing sheet is used for producing the hot-melt type damping sheet.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) According to the hot-melt type damping sheet cooling and punching device, the hot-melt type damping sheet is cooled through the air cooling mechanism and then punched, so that adhesion of the hot-melt type damping sheet to a blade during punching is reduced, and burrs are avoided as much as possible; the height and thickness of the cutting die are adaptively adjusted through the lifting type height adjusting mechanism, and after the heat-melting type damping sheet is acted, the lifting stroke can be shortened, and the damage to a conveying belt caused by excessive cutting is avoided; in the hot-melt type damping sheet ingredients subjected to punching processing, the consumption of asphalt is only less than 9% of the total weight, when the hot-melt type damping sheet ingredients are applied to an automobile, the generation of harmful gas is greatly reduced in a limited space of the automobile, and most of residual smell is removed after a period of ventilation after application, so that the use risk of a damping plate in the automobile can be greatly reduced;
(2) According to the hot-melt type damping sheet cooling and punching device, the wind direction of the blower directly blows the hot-melt type damping sheet downwards, so that the firmness of a hot-baking coating film is ensured while cooling; the four corners of the stamping table are balanced by the 4 lifting screws to adjust the lifting so as to ensure the balance of the stamping surface; the damping sheet sensing mechanism is arranged, so that when the damping sheet passes, the control mechanism can be informed to stop punching, and the cutting die is prevented from damaging the conveying belt by empty cutting; in addition, the material of the heat-soluble type damping sheet processed by punching is made of the superfine heavy calcium powder and the superfine light calcium powder, and the two superfine calcium powder and the softened asphalt are matched for use, so that the bonding strength of the heat-soluble type damping sheet and the asphalt can be improved (the bonding force of the asphalt and the polymerization capacity of the superfine powder is improved), and the extrusion tabletting and layering in the use process after punching are avoided;
(3) According to the hot-melt type damping sheet cooling and punching device, corresponding adjustment can be performed according to the specification of the cutting die, and the universality of the device is improved; in addition, the powder prepared by the freeze-drying process in the preparation of the hot-melt type damping sheet can be in a light and brittle honeycomb structure as small particles and formed blocky bodies, and the cost is greatly reduced when the powder is ground into superfine micropowder;
(4) According to the hot-melt type damping sheet cooling and punching device, the whole cutter die width adjusting mechanism is convenient to operate, accurate in positioning, and capable of positioning and fixing the cutter die in all directions, burrs are reduced as much as possible during punching, and damage of a cutter blade to a conveying belt is further avoided; in the preparation process of the superfine heavy calcium powder, as free water is mainly added and bound water is less, compared with the freeze-drying of food and medicines, the freeze-drying process has relatively low freeze-drying cost, and the yield of freeze-dried food is obviously lower than 10%, and the freeze-drying preparation of the superfine heavy calcium powder can reach 50% or even more than 80%;
(5) According to the hot-melt type damping sheet cooling and punching device, the clamping groove can enable clamping of the cutting die to be more convenient, and replacement is also more convenient; the hot-melt type damping sheet needs a special conveying belt when being punched, the breaking strength is more than 20Mpa, the breaking elongation is more than 400%, and the aims of no burr and long service life of the conveying belt are achieved by combining the two aspects; in addition, in the freeze-drying production of the superfine light calcium powder in the production of the heat-melting type damping sheet, commercial light calcium powder can be used for secondary freeze-drying processing, and the cost is doubled at most or lower than that of common asphalt, so that the superfine light calcium powder replaces part of asphalt, firstly, the production cost is reduced, secondly, the generation of harmful gas can be reduced, thirdly, the superfine light calcium powder is matched with the superfine light calcium powder, and the bonding strength with the asphalt is improved (so as to achieve the effective bonding of organic matters and inorganic matters);
(6) The hot-melt type damping sheet cooling and punching device has the advantages that the temperature of minus 38 ℃ to minus 40 ℃ and the quick-freezing temperature in the manufacture of the hot-melt type damping sheet are determined by combining the properties of calcium powder, when the temperature is too high, the penetration capability of ice crystals to particles is poor, and micropores generated after freeze-drying are shallow and less; when the content is too low, the depth and the quantity of micropores can be increased, but the production cost can be greatly increased; the freeze-drying curve is set, which is a targeted design by the inventor in combination with the attribute of more free water, the whole freeze-drying process is carried out for about 2 hours, and the freeze-drying cost is low;
(7) According to the hot-melt type damping sheet cooling and punching device, the asphalt modifier and/or the softening agent are mixed and added in the second step in the production of the hot-melt type damping sheet, and the asphalt modifier and/or the softening agent can be freeze-dried and positioned around the micro powder, so that the combination of the asphalt modifier and the softening agent in the later stirring process is improved, the functions of the asphalt modifier and the softening agent are conveniently and rapidly unfolded, the time of the whole processing technology is reduced, and the aging of the asphalt in stirring is avoided;
(8) According to the production method of the hot-melt type damping sheet cooling and punching device, through omnibearing adjustment and fixation of the cutting die, frequent punching can be improved, so that the production cost is reduced, the production efficiency is improved, and the punching has no burrs.
Drawings
FIG. 1 is a schematic diagram of a stamping and cutting device for a molten damping fin according to the present invention;
FIG. 2 is an enlarged view of a portion of the die width adjustment mechanism of the present invention;
fig. 3 is a top view of a cutting die in the present invention.
In the figure: 7. an air cooling mechanism; 8. a punching and cutting device body; 9. a special conveyer belt; 10. a heat-soluble damping sheet; 71. an air cooling box; 72. a screen; 73. a blower; 74. an air-cooled conveyor belt; 81. a cutting die; 82. a supporting table; 83. a stamping table; 84. a lifting type height adjusting mechanism; 85. a cutter die width adjusting mechanism; 87. damping fin induction mechanism; 88. a compressed air pipe; 811. a blade; 812. a sponge layer; 851. a cylinder; 852. a screw rod; 853. a ball type width adjusting frame; 854. a positioning frame; 855. the cutting die is connected with the fixing frame; 856. screw hole blocks; 8551. a clamping groove.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings.
Example 1
The hot-melt type damping sheet cooling and punching device of the embodiment comprises an air cooling mechanism 7, a punching and cutting device body and a special conveying belt which passes through the punching and cutting device body and conveys the hot-melt type damping sheet, as shown in fig. 1; wherein: the air cooling mechanism 7 comprises an air cooling box 71, a blower 73 and an air cooling conveyer belt 74; a blower 73 is fixed in the air cooling box 71 and is buckled right above the air cooling conveyer belt 74; the tail end of the air-cooled conveyer belt 74 is connected with the special conveyer belt 9 through the hot-melt type damping sheet 10 in the conveying process, and the hot-melt type damping sheet 10 is transferred to the special conveyer belt 9; the punching and cutting device body 8 comprises two supporting tables 82 on two sides of the special conveying belt 9, a punching table 83 horizontally arranged and fixed on the side surfaces of the two supporting tables 82, and a lifting height adjusting mechanism 84; the punching stage 83 is connected with a cutter die 81 detachably arranged at the bottom of the punching stage 83 through a lifting type height adjusting mechanism 84. The special conveyer belt 9 is a nylon conveyer belt mainly made of nylon materials, the breaking strength is larger than 20Mpa, the breaking elongation is larger than 400%, the hot-melt type damping sheet 10 is suitable for the invention, and the ingredients of the hot-melt type damping sheet 10 comprise 700 kg of calcium powder, 80 kg of mica powder, 80 kg of asphalt, 10 kg of asphalt modifier such as SBS styrene, EVA ethylene-vinyl acetate copolymer, 8 kg of softener such as vegetable oil, rubber rolling oil and the like, and 5 kg of fiber such as fibrilia and aromatic fiber.
The processing method of the hot-melt damping fin 10 in this embodiment includes the following steps:
1. asphalt softening: putting AH-80 asphalt into a kneader, heating to about 100 ℃ for softening, and stirring into fluid;
2. stirring: sequentially adding SBS and vegetable oil into a kneader in sequence, and stirring for 10 minutes;
3. breaking fibers: in the stirring process of the step 2, crushing fibrilia to 16 meshes, and then putting the fibrilia into a kneader for stirring for 20 minutes;
4. adding calcium powder: adding the calcium powder and the mica powder into a kneader for continuous stirring;
5. extrusion: after the stirring, the mixture was transferred to an extruder and extruded and pressed into a twin roll sheet to form a heat-fusible type damping sheet 10.
In the punching process of the hot-melt type damping sheet 10 in the embodiment, the hot-melt type damping sheet 10 is cooled by the air cooling mechanism 7 and then punched, so that the adhesion of the hot-melt type damping sheet 10 to the blade during punching is reduced, and burrs are avoided as much as possible; the height and thickness of the cutting die 81 are adaptively adjusted by the lifting height adjusting mechanism 84, so that after the hot-melt type damping sheet 10 is acted, the lifting stroke can be shortened, and the damage to a conveying belt caused by excessive cutting can be avoided; in addition, in the ingredients of the hot-melt type damping sheet 10, the consumption of asphalt is only about 9%, when the punched damping sheet is applied to an automobile, the generation of harmful gas is greatly reduced, and after the application, ventilation and removal are carried out for a period of time, and most of residual smell is removed, so that the use risk of the damping sheet is reduced.
Example 2
The cooling and punching device for the hot-melt type damping sheet of the embodiment has the same basic structure as that of the embodiment 1, and is different from and improved in that: the upper part of the air cooling box 71 is an open opening, a separation net 72 is fixedly connected in the opening, and foreign matters are prevented from falling into a blower 73; the hot-melt type damping sheet 10 is directly blown downwards by the wind direction of the blower 73; the lifting height adjusting mechanism 84 is composed of 4 lifting screws symmetrically arranged at four corners of the punching table 83; the bottom of the front end of the special conveying belt 9 is provided with a damping fin sensing mechanism 87. The ingredients of the hot melt type damping sheet 10 comprise 100 kg of ultra-fine light calcium powder with the particle size of 0.5-1 mu m, 500 kg of ultra-fine heavy calcium powder with the particle size of 0.5-1 mu m, 70 kg of mica powder, 60 kg of asphalt, 8 kg of asphalt modifier such as SBS styrene or EVA ethylene-vinyl acetate copolymer, 4 kg of softener such as vegetable oil, rubber oil, and the like, and 3 kg of fiber such as fibrilia and aromatic fiber.
The processing method of the hot-melt type damping sheet comprises the following steps:
1. asphalt softening: putting AH-90 asphalt into a kneader, heating to about 110 ℃ for softening, and stirring into fluid;
2. stirring: sequentially adding EVA and rubber oil into a kneader in sequence, and stirring for 10 minutes;
3. Breaking fibers: in the stirring process of the step 2, crushing fibrilia to 20 meshes, and then putting the fibrilia into a kneader to continuously stir for 20 minutes;
4. adding calcium powder: adding the superfine heavy calcium powder, the superfine light calcium powder and the mica powder into a kneader for continuous stirring;
5. extrusion: after the stirring, the mixture was transferred to an extruder and extruded and pressed into a twin roll sheet to form a heat-fusible type damping sheet 10.
The hot-melt type damping sheet cooling and punching device of the embodiment ensures the firmness of the hot-baking coating film when cooling the hot-melt type damping sheet 10 by directly blowing the hot-melt type damping sheet downwards by the wind direction of the blower 73; lifting can be regulated in a four-corner balance mode so as to ensure the balance of the punching surface; when the damping sheet passes through the damping sheet sensing mechanism 87, the control mechanism can be informed to stop punching, so that the cutter mould 81 is prevented from damaging the conveying belt by empty cutting; the die-cut damping sheet can improve the bonding strength with asphalt by the polymerization capability of the ultrafine powder and the bonding force with asphalt due to the fact that two ultrafine calcium powder and softened asphalt are matched for use, and avoids lamination in the processes of tabletting, die cutting and use. But the grinding cost of the two superfine calcium powders is higher, which results in the improvement of the production cost.
Example 3
The cooling and punching device for the hot-melt type damping sheet of the embodiment has the same basic structure as that of the embodiment 2, and is different from and improved in that: and the device also comprises 2 cutter width adjusting mechanisms 85 which are respectively arranged on the front side and the rear side of the stamping table 83 and right above the special conveying belt 9. The components of the hot melt type damping sheet 10 ingredients comprise 175 kg of superfine light calcium powder with the particle size of 0.5-1 mu m, 525 kg of superfine heavy calcium powder with the particle size of 0.5-1 mu m, 75 kg of mica fine powder, 70 kg of asphalt, 9 kg of asphalt modifier such as SBS styrene or EVA ethylene-vinyl acetate copolymer, 6 kg of softener such as vegetable oil, rubber oil, and the like, and 4 kg of fiber such as fibrilia and aromatic fiber, wherein: the processing steps of the superfine light calcium powder or the superfine heavy calcium powder are as follows:
Step one, mixing: fully mixing commercially available heavy calcium powder or light calcium powder, a dispersing agent and water to form a freeze-dried precursor;
step two, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse at about minus 38 ℃ to minus 40 ℃ to be quick-frozen into blocks;
step three, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
step four, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine light calcium powder.
The processing method of the hot-melt type damping sheet comprises the following steps:
1. asphalt softening: putting AH-90 asphalt into a kneader, heating to about 110 ℃ for softening, and stirring into fluid;
2. stirring: sequentially adding EVA and rubber oil into a kneader in sequence, and stirring for 10 minutes;
3. breaking fibers: in the stirring process of the step 2, crushing fibrilia to 20 meshes, and then putting the fibrilia into a kneader to continuously stir for 20 minutes;
4. adding calcium powder: adding the freeze-dried superfine heavy calcium powder, the superfine light calcium powder and the mica powder into a kneader for stirring for 10 minutes;
5. extrusion: after the stirring, the mixture was transferred to an extruder and extruded and pressed into a twin roll sheet to form a heat-fusible type damping sheet 10.
The hot melt type damping sheet cooling and punching device of the embodiment can correspondingly adjust the cutter die width adjusting mechanism 85 according to the cutter die specification, so that the universality of the device is improved; the superfine light calcium powder and the superfine heavy calcium powder which are obtained by grinding after freeze-drying and used by the hot melt type damping sheet 10 are more tightly combined with asphalt, a softening agent and a modifying agent fluid due to micropores or micro pits on the surfaces of the superfine light calcium powder and the superfine heavy calcium powder, so that the bonding strength is greatly improved on the premise of greatly reducing the using amount of the asphalt, the damping coefficient is correspondingly improved, and the damping coefficient has good damping, sound insulation and heat preservation effects.
Example 4
The cooling and punching device for the hot-melt type damping sheet of the embodiment has the same basic structure as that of the embodiment 3, and is different from and improved in that: as shown in fig. 2, the die width adjusting mechanism 85 comprises an air cylinder 851, a screw 852, a ball type width adjusting frame 853, a positioning frame 854, a die receiving fixing frame 855 and screw hole blocks 856, wherein the ball type width adjusting frame 853 is fixed on the side surface of the stamping table 83; the screw 852 passes through the ball type width adjusting frame 853, and extends to the left and right ends with the ball type width adjusting frame 853 as the center, threads of the left and right parts are reversely arranged, and two ends of the screw 852 respectively pass through the screw hole blocks 856; each screw hole block 856 is fixed in the respective cutter die receiving fixing frame 855; the positioning frame 854 is in a frame shape with a downward opening, the positioning frame is reversely buckled above the cutter die supporting and fixing frame 855, the air cylinder 851 is arranged above the positioning frame 854, a telescopic rod in the air cylinder 851 passes through the positioning frame 854 and the cutter die supporting and fixing frame 855 and then acts on the screw hole block 856, the whole cutter die width adjusting mechanism 85 is convenient to operate and accurate to position, the cutter die 81 is positioned and fixed in an omnibearing manner, burrs are reduced as much as possible during punching, and damage of the cutter 811 to a conveying belt is further avoided; the components of the ingredients of the hot melt type damping sheet 10 comprise 120 kg of superfine light calcium powder with the particle size of 0.5-1 mu m, 480 kg of superfine heavy calcium powder with the particle size of 0.5-1 mu m, 75 kg of mica fine powder, 60 kg of asphalt, 9 kg of asphalt modifier such as SBS styrene or EVA ethylene-vinyl acetate copolymer, 6 kg of softener such as vegetable oil, rubber oil, oil padding and the like, and 4 kg of fiber such as fibrilia and aromatic fiber, wherein: the processing steps of the superfine heavy calcium powder are as follows:
Step one, rough grinding: firstly, mechanically crushing calcite, and then, conveying the crushed calcite into a grinding machine for grinding to obtain coarse calcium carbonate powder;
step two, mixing: fully mixing coarse calcium carbonate powder, a dispersing agent and water to obtain a freeze-dried precursor;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse for quick-freezing into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine heavy calcium powder.
The preparation method of the superfine light calcium powder comprises the following steps:
step one, reactant generation: performing double decomposition reaction on sodium carbonate and calcium chloride to generate calcium carbonate precipitate, and filtering to obtain calcium carbonate coarse powder;
step two, mixing: fully mixing coarse calcium carbonate powder, a dispersing agent and water to obtain a freeze-dried precursor;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse for quick-freezing into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine light calcium powder.
The processing method of the hot-melt type damping sheet comprises the following steps:
1. Asphalt softening: putting AH-90 asphalt into a kneader, heating to about 110 ℃ for softening, and stirring into fluid;
2. stirring: sequentially adding EVA and rubber oil into a kneader in sequence, and stirring for 10 minutes;
3. breaking fibers: in the stirring process of the step 2, crushing fibrilia to 20 meshes, and then putting the fibrilia into a kneader to continuously stir for 20 minutes;
4. adding calcium powder: adding the freeze-dried superfine heavy calcium powder, the superfine light calcium powder and the mica powder into a kneader for stirring for 10 minutes;
5. extrusion: after the stirring, the mixture was transferred to an extruder and extruded and pressed into a twin roll sheet to form a heat-fusible type damping sheet 10.
The production method of the hot-melt type damping sheet cooling and punching device comprises the following steps:
step one, placing a cutting die 81: the cutter mould 81 is placed between two opposite 4 cutter mould bearing fixing frames 855;
step two, width adjustment: rotating the round handle of the ball type width adjusting frame 853, and driving the cutter die bearing fixing frame 855 to move oppositely by the screw 852 with opposite wires at two ends until two side ends of the cutter die 81 are clamped;
step three, starting the air cylinder: starting the cylinder 851, and enabling high-pressure gas to act on the cylinder telescopic rod through the compressed air pipe 88 to drive the cutter die bearing fixing frame 855 to ascend until the upper surface of the cutter die 81 is in close contact with the bottom end of the lifting screw;
Step four, thickness adjustment: adjusting the thickness of the cut thermal-melting type damping sheet 10 by rotating the lifting screw;
step five, cooling: after the heat-soluble type damping sheet 10 is coated and heat-baked for shaping, the heat-soluble type damping sheet 10 is transferred into an air cooling box 71 through an air cooling conveying belt 74, a blower 73 is started, and the heat-soluble type damping sheet 10 is subjected to air cooling in the conveying process;
step six, transferring: the air-cooled conveyer belt 74 conveys the hot-melt damping fin 10 to the special conveyer belt 9;
step seven, starting a special conveying belt: starting a special conveying belt 9 to bring the hot-melt type damping sheet 10 below the cutting die 81;
step eight, starting the punching and cutting device body: the punching and cutting device body 8 is used for punching the hot-melt damping sheet 10 into a single damping sheet by setting up the upper and lower punching frequencies through the numerical control cabinet and the transmission speed of the special conveying belt 9, and is used in transportation tools such as automobiles, electric vehicles and the like.
According to the production method of the hot-melt type damping sheet cooling and punching device, through omnibearing adjustment and fixation of the cutting die, frequent punching can be improved, so that the production cost is reduced, the production efficiency is improved, and the punching is free of burrs.
Example 5
The cooling and punching device for the hot-melt type damping sheet of the embodiment has the same basic structure as that of the embodiment 4, and is different from and improved in that: the bottom of the fixing frame 855 is supported by the cutting die, and the clamping groove 8551 for clamping the cutting die 81 is formed in the bottom, so that clamping of the cutting die 81 is facilitated, and replacement of the cutting die 81 is more convenient. The components of the hot-melt type damping sheet 10 ingredients comprise 240 kg of superfine light calcium powder with the particle size of 0.5-1 mu m, 460 kg of superfine heavy calcium powder with the particle size of 0.5-1 mu m, 75 kg of mica fine powder, 60 kg of asphalt, 8 kg of asphalt modifier such as SBS styrene or EVA ethylene-vinyl acetate copolymer, 5 kg of softener such as vegetable oil, rubber oil, and the like, 3 kg of fiber such as fibrilia and aromatic fiber, wherein: the processing steps of the superfine heavy calcium powder are as follows:
Step one, rough grinding: firstly, mechanically crushing calcite, and then, conveying the crushed calcite into a grinding machine for grinding to obtain coarse calcium carbonate powder;
step two, mixing: when calcium carbonate coarse powder, 4 kg of EVA, 3 kg of rubber rolling oil and water are fully mixed to form a freeze-dried precursor, the freeze-dried precursor can be mixed by a homogenizer, so that the effect is better, but the cost is high;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse at about-38 ℃ to be quick-frozen into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine heavy calcium powder.
The preparation method of the superfine light calcium powder comprises the following steps:
step one, reactant generation: performing double decomposition reaction on sodium carbonate and calcium chloride to generate calcium carbonate precipitate, and filtering to obtain calcium carbonate coarse powder;
step two, mixing: fully mixing coarse calcium carbonate powder, the residual EVA, the rolling glue oil and water to form a freeze-drying precursor;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse at about-38 ℃ to be quick-frozen into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
Step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine light calcium powder.
The processing method of the hot-melt type damping sheet comprises the following steps:
1. asphalt softening: putting AH-90 asphalt into a kneader, heating to about 110 ℃ for softening, and stirring into fluid;
2. breaking fibers: in the stirring process of the step 1, crushing fibrilia to 10 meshes, and then putting the fibrilia into a kneader to continuously stir for 20 minutes;
3. adding calcium powder: adding the freeze-dried superfine heavy calcium powder, the superfine light calcium powder and the mica powder into a kneader, and continuously stirring for about 5 minutes;
4. extrusion: after the stirring is finished, the mixture is transferred into an extruder for extrusion, and a pair-roller pressing sheet is used for generating a hot-melt type damping sheet 10;
5. the cutting die 81 is placed: clamping the cutting die 81 into the opposite 4 clamping grooves 8551;
6. width adjustment: rotating the round handle of the ball type width adjusting frame 853, and driving the cutter die bearing fixing frame 855 to move oppositely by the screw 852 with opposite wires at two ends until two side ends of the cutter die 81 are clamped;
7. and (3) starting a cylinder: starting an air cylinder 851, and driving a cutter die bearing fixing frame 855 to ascend by an air cylinder telescopic rod until the upper surface of the cutter die 81 is in close contact with the bottom end of a lifting screw;
8. thickness adjustment: adjusting the thickness of the cut thermal-melting type damping sheet 10 by rotating the lifting screw;
9. And (3) cooling: after the heat-soluble type damping sheet 10 is coated and heat-baked for shaping, the heat-soluble type damping sheet 10 is transferred into an air cooling box 71 through an air cooling conveying belt 74, a blower 73 is started, and the heat-soluble type damping sheet 10 is subjected to air cooling in the conveying process;
10. and (3) transferring: the air-cooled conveyer belt 74 conveys the hot-melt damping fin 10 to the special conveyer belt 9;
11. and (3) starting a special conveying belt: starting a special conveying belt 9 to bring the hot-melt type damping sheet 10 below the cutting die 81;
12. starting the punching and cutting device body: the punching and cutting device body 8 is used for punching the hot-melt damping sheet 10 into a single damping sheet by setting up the upper and lower punching frequencies through the numerical control cabinet and the transmission speed of the special conveying belt 9.
In the production process of the hot-melt type damping sheet, the asphalt modifier and the softening agent are mixed and added in the second step, and the asphalt modifier and/or the softening agent can be freeze-dried and positioned around the micro powder, so that the combination of the asphalt modifier and the softening agent in the later stirring process and the asphalt is improved, the functions of the asphalt modifier and the softening agent are conveniently and rapidly unfolded, the time of the whole processing technology is reduced, and the aging of the asphalt in stirring is avoided.
Example 6
The cooling and punching device for the hot-melt type damping sheet of the embodiment has the same basic structure as that of the embodiment 5, and is different from and improved in that: the components of the heat-soluble type damping sheet 10 comprise 240 kg of superfine light calcium powder with the particle size of 0.5-1 mu m, 460 kg of superfine heavy calcium powder with the particle size of 0.5-1 mu m, 70 kg of mica fine powder, 65 kg of asphalt, 9 kg of asphalt modifier such as SBS styrene or EVA ethylene-vinyl acetate copolymer, 6 kg of softener such as vegetable oil, rubber oil, and the like, 5 kg of fiber such as fibrilia and aromatic fiber, wherein: the processing steps of the superfine heavy calcium powder are as follows:
Step one, rough grinding: firstly, mechanically crushing calcite, and then, conveying the crushed calcite into a grinding machine for grinding to obtain coarse calcium carbonate powder;
step two, mixing: when the coarse calcium carbonate powder, 4 kg of EVA and water are fully mixed to form a freeze-dried precursor, the freeze-dried precursor can be mixed by a homogenizer, so that the effect is better, but the cost is high;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse at about-38 ℃ to be quick-frozen into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
the lyophilization process profile is:
A. heating period: the plate temperature is 0 ℃ to 100 ℃, the heating slope is 5 ℃/min, the temperature is kept at 100 ℃ for 20 minutes to 30 minutes, and the vacuum is pumped to be within 100 Pa;
B. and (3) heat preservation period: the temperature of the plate is reduced to 85 ℃/min, the plate is kept for 30 minutes, and the vacuum is controlled within 80 Pa;
C. later stage: the temperature of the plate is reduced to 70 ℃ per minute, the plate is kept for 40 minutes, and the vacuum is controlled within 50 Pa.
D. Taking out from the bin to obtain a material which is freeze-dried into honeycomb blocks;
step five, fine grinding: and (3) conveying the honeycomb block material into a grinder to be finely ground into superfine heavy calcium carbonate powder, analyzing the morphology and the components of the powder material by using a field emission scanning microscope, and grinding to obtain superfine heavy calcium carbonate powder with more or less or deep or shallow micropores on the particle surface.
The preparation method of the superfine light calcium powder comprises the following steps:
step one, reactant generation: performing double decomposition reaction on sodium carbonate and calcium chloride to generate calcium carbonate precipitate, and filtering to obtain calcium carbonate coarse powder;
step two, mixing: fully mixing coarse calcium carbonate powder, the residual EVA, the rolling glue oil and water to form a freeze-drying precursor;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse at about-40 ℃ to be quick-frozen into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials; the freeze-drying process is the same as that of the heavy calcium powder;
step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine light calcium powder.
The processing method of the hot-melt type damping sheet cooling and punching device comprises the following steps:
1. asphalt softening: putting AH-80 asphalt into a kneader, heating to about 100 ℃ for softening, and stirring into fluid;
2. breaking fibers: in the stirring process of the step 1, crushing fibrilia to 10 meshes, and then putting the fibrilia into a kneader to continuously stir for 20 minutes;
3. adding calcium powder: adding the freeze-dried superfine heavy calcium powder, superfine light calcium powder and mica powder into a kneader, continuously stirring for about 5 minutes, diluting the stirred fluid with water for testing, taking the precipitate, and carrying out appearance and component analysis on the powder material by a microscope to find that more or less asphalt around the particles permeates into micropores; the combination degree of asphalt and particles is improved;
4. Extrusion: after the stirring, the mixture was transferred to an extruder and extruded and pressed into a twin roll sheet to form a heat-fusible type damping sheet 10.
The rest of the procedure is the same as in example 5.
The hot-melt type damping sheet 10 prepared in this embodiment has the whole lyophilization process of about 2 hours, the production cost will not be increased, and the heavy calcium powder and the light calcium powder with greatly improved proportions have a slow release effect on the smell of asphalt after asphalt permeates into micropores, so that the harm to human bodies caused by batch production of harmful gas in a short time is avoided.
Example 7
The hot melt type damping sheet 10 of this example is the same as example 6 in basic components and steps, except that: asphalt modifier and/or softener can be added in the second step and the step 2 respectively to exert the functions as much as possible, so that the effect is prevented from weakening after all the asphalt modifier and/or softener are applied in a certain step.
Example 8
The hot melt type damping sheet 10 of this example is basically the same as example 5, except for the following improvements:
the processing steps of the superfine heavy calcium powder are as follows:
step one, rough grinding: firstly, mechanically crushing calcite, and then, conveying the crushed calcite into a grinding machine for grinding to obtain coarse calcium carbonate powder;
step two, mixing: when the coarse calcium carbonate powder, 4 kg of EVA and water are fully mixed to form a freeze-dried precursor, the freeze-dried precursor can be mixed by a homogenizer, so that the effect is better, but the cost is high; the water dosage is 2.5 times of the total weight of the coarse powder;
Step three, quick freezing: spreading the freeze-dried precursor into a mould, then placing the mould into a quick-freezing warehouse at about-38 ℃ to be quick-frozen into blocks, and arranging a tray with the thickness of 6cm;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
the lyophilization process profile is:
A. heating period: the plate temperature is 0 ℃ to 100 ℃, the heating slope is 5 ℃/min, the temperature is kept at 100 ℃ for 20 minutes, and the vacuum is pumped to be within 100 Pa;
B. and (3) heat preservation period: the temperature of the plate is reduced to 80 ℃/min, the plate is kept for 40 minutes, and the vacuum is controlled within 80 Pa;
C. later stage: the temperature of the plate is reduced to 60 ℃ per minute, the plate is kept for 50 minutes, and the vacuum is controlled within 50 Pa.
D. Taking out from the bin to obtain a material which is freeze-dried into honeycomb blocks;
the cold trap temperature of each freeze-drying step is controlled below minus 30 ℃;
step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine heavy calcium powder.
The preparation method of the superfine light calcium powder comprises the following steps:
step one, reactant generation: performing double decomposition reaction on sodium carbonate and calcium chloride to generate calcium carbonate precipitate, and filtering to obtain calcium carbonate coarse powder;
step two, mixing: fully mixing coarse calcium carbonate powder, rolling glue oil and water to obtain a freeze-dried precursor; the water dosage is 3 times of the total weight of the coarse powder;
step three, quick freezing: spreading the freeze-dried precursor into a mold with the thickness of 5.0cm, and quick-freezing the precursor into blocks in a quick-freezing warehouse at about-40 ℃;
Step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials; the freeze-drying process is the same as that of the heavy calcium powder;
step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine light calcium powder.
The processing method of the hot-melt type damping sheet comprises the following steps:
1. asphalt softening: putting AH-80 asphalt into a kneader, heating to about 100 ℃ for softening, and stirring into fluid;
2. stirring: adding the residual EVA into a kneader for stirring;
3. breaking fibers: in the stirring process of the step 1, crushing fibrilia to 10 meshes, and then putting the fibrilia into a kneader to continuously stir for 20 minutes;
4. adding calcium powder: adding the freeze-dried superfine heavy calcium powder, the superfine light calcium powder and the mica powder into a kneader, and continuously stirring for about 5 minutes;
5. extrusion: after the stirring, the mixture was transferred to an extruder and extruded and pressed into a twin roll sheet to form a heat-fusible type damping sheet 10.
The rest of the procedure is the same as in example 5.
The hot-melt type damping sheet 10 prepared in this embodiment has the whole lyophilization process of about 2 hours, the production cost will not be increased, and the heavy calcium powder and the light calcium powder with greatly improved proportions have a slow release effect on the smell of asphalt after asphalt permeates into micropores, so that the harm to human bodies caused by batch production of harmful gas in a short time is avoided. The hot-melt type damping sheet has good viscoelastic performance, is especially suitable for punching by the punching and cutting device of the melt type damping sheet, is matched with a special nylon conveying belt with the breaking strength of more than 20Mpa and the breaking elongation of more than 400 percent, has no burrs after punching, has good combination performance with an automobile shell after being applied to an automobile, has good shock absorption and sound insulation effects, and is especially less in harmful gas, and is an environment-friendly damping sheet.
Example 9
The cooling and punching device for the hot-melt type damping sheet of the embodiment has the same basic structure as that of the embodiment 5, and is different from and improved in that: as shown in fig. 3, a sponge layer 812 having the same thickness as the blade 811 is laid around the blade 811 on the die 81.
In this embodiment, the sponge layer 812 is disposed, so that the blade 811 can be cleaned during punching, and a small amount of lubricating oil can be sprayed into the sponge layer 812 to keep the knife edge clean and lubricated, so as to further reduce the generation of burrs.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.

Claims (8)

1. A hot melt type damping sheet cooling and punching device, characterized by comprising: an air cooling mechanism (7), a punching and cutting device body (8) and a special conveying belt (9) which passes through the punching and cutting device body (8) and conveys a hot-melt damping sheet (10); wherein:
The air cooling mechanism (7) comprises an air cooling box (71), a blower (73) and an air cooling conveyer belt (74); a blower (73) is fixed in the air cooling box (71) and is buckled right above the air cooling conveyer belt (74); the tail end of the air-cooled conveyer belt (74) is connected with the special conveyer belt (9) through the hot-melt type damping sheet (10) in conveying, and the hot-melt type damping sheet (10) is transferred to the special conveyer belt (9);
the punching and cutting device body (8) comprises two supporting tables (82) on two sides of a special conveying belt (9), a punching table (83) which is horizontally arranged and fixed on the side surfaces of the two supporting tables (82) and a lifting type height adjusting mechanism (84); the stamping table (83) is connected with a cutting die (81) detachably arranged at the bottom of the stamping table (83) through a lifting type height adjusting mechanism (84); the die width adjusting mechanism (85) is respectively arranged at the front side and the rear side of the stamping table (83) and is arranged right above the special conveying belt (9);
the cutter die width adjusting mechanism (85) comprises an air cylinder (851), a screw (852), a ball type width adjusting frame (853), a positioning frame (854), a cutter die bearing fixing frame (855) and screw hole blocks (856), wherein the ball type width adjusting frame (853) is fixed on the side surface of the stamping table (83); the screw rod (852) penetrates through the ball type width adjusting frame (853) and extends to the left and right ends by taking the ball type width adjusting frame (853) as a center, threads of the left and right parts are reversely arranged, and two ends of the screw rod (852) penetrate through screw hole blocks (856) respectively; each screw hole block (856) is fixed in a corresponding cutter die bearing fixing frame (855); the positioning frame (854) is in a frame shape with a downward opening, the positioning frame is reversely buckled above the cutting die supporting fixing frame (855), an air cylinder (851) is arranged above the positioning frame (854), and a telescopic rod in the air cylinder (851) passes through the positioning frame (854) and the cutting die supporting fixing frame (855) and then acts on the screw hole block (856).
2. The hot melt type damping sheet cooling and blanking apparatus according to claim 1, characterized in that: the upper part of the air cooling box (71) is an open opening, and a separation net (72) is fixedly connected in the opening; the wind direction of the blower (73) is downward and directly blowing the hot-melt type damping sheet (10);
the lifting height adjusting mechanism (84) is composed of 4 lifting screws symmetrically arranged at four corners of the stamping table (83); the bottom of the front end of the special conveying belt (9) is provided with a damping fin sensing mechanism (87).
3. The hot melt type damping sheet cooling and blanking apparatus according to claim 2, characterized in that: the bottom of the cutter die bearing fixing frame (855) is internally provided with a clamping groove (8551) for clamping the cutter die (81); the special conveyer belt (9) has the tensile strength of more than 20Mpa and the elongation at break of more than 400%.
4. A method of producing a hot melt type damping sheet cooling and blanking apparatus according to claim 3, characterized by the steps of:
step one, placing a cutting die (81): placing the cutting die (81) between two opposite 4 cutting die bearing fixing frames (855);
step two, width adjustment: rotating a round handle of the ball type width adjusting frame (853), and driving a cutter die bearing fixing frame (855) to move in opposite directions by a screw rod (852) with opposite threads at two ends until two side ends of a cutter die (81) are clamped;
Step three, starting the air cylinder: starting an air cylinder (851), and driving the cutting die supporting fixing frame (855) to ascend by an air cylinder telescopic rod until the upper surface of the cutting die (81) is tightly contacted with the bottom end of the lifting screw;
step four, thickness adjustment: adjusting the cutting thickness of the hot-melt type damping sheet (10) by rotating the lifting screw;
step five, cooling: after the heat-melting type damping sheet (10) is coated and heat-baked for shaping, the heat-melting type damping sheet is transferred into an air cooling box (71) through an air cooling conveying belt (74), a blower (73) is started, and the heat-melting type damping sheet (10) is subjected to air cooling in the conveying process;
step six, transferring: the air-cooled conveyer belt (74) conveys the hot-melt type damping sheet (10) to the special conveyer belt (9);
step seven, starting a special conveying belt: starting a special conveying belt (9) to bring the hot-melt type damping sheet (10) below a cutting die (81);
step eight, starting the punching and cutting device body: the punching and cutting device body (8) is used for punching the hot-melt damping sheet (10) into a single damping sheet by setting up the upper and lower punching frequencies through the numerical control cabinet and the special conveying belt (9) conveying speed.
5. The method for producing a hot melt type damping sheet cooling and punching apparatus according to claim 4, characterized in that: the ingredients of the hot-melt type damping sheet (10) comprise 600-700 parts by weight of calcium powder, 70-80 parts by weight of mica powder, 60-80 parts by weight of asphalt, 8-10 parts by weight of asphalt modifier, 4-8 parts by weight of softener and 3-5 parts by weight of fiber; the calcium powder comprises heavy calcium powder and light calcium powder, wherein the heavy calcium powder and the light calcium powder are ultrafine heavy calcium powder and ultrafine light calcium powder with particle diameters of 0.5-1 mu m, and the proportion relation is as follows: (3-5): 1.
6. The method for producing a hot melt type damping sheet cooling and punching apparatus according to claim 5, characterized in that: the superfine heavy calcium powder and the light calcium powder are manufactured by a vacuum freeze drying process in the manufacturing process;
the preparation method of the superfine heavy calcium powder comprises the following steps:
step one, rough grinding: firstly, mechanically crushing calcite, and then, conveying the crushed calcite into a grinding machine for grinding to obtain coarse calcium carbonate powder;
step two, mixing: fully mixing coarse calcium carbonate powder, a dispersing agent and water to obtain a freeze-dried precursor;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse for quick-freezing into blocks;
step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
step five, fine grinding: feeding the honeycomb block material into a grinder for fine grinding to superfine heavy calcium powder;
the preparation method of the superfine light calcium powder comprises the following steps:
step one, reactant generation: performing double decomposition reaction on sodium carbonate and calcium chloride to generate calcium carbonate precipitate, and filtering to obtain calcium carbonate coarse powder;
step two, mixing: fully mixing coarse calcium carbonate powder, a dispersing agent and water to obtain a freeze-dried precursor;
step three, quick freezing: spreading the freeze-dried precursor into a mould, and then placing the mould into a quick-freezing warehouse for quick-freezing into blocks;
Step four, freeze-drying: pushing the blocky materials into a freeze-drying bin for freeze-drying to obtain honeycomb blocky materials;
step five, fine grinding: and (3) feeding the honeycomb block material into a grinder for fine grinding to superfine light calcium powder.
7. The production method of the hot-melt type damping sheet cooling and punching device according to claim 5 or 6, characterized in that: the quick-freezing temperature is-38 to-40 ℃; the freeze-drying process curve is as follows:
A. heating period: the plate temperature is 0 ℃ to 100 ℃, the heating slope is 5 ℃/min, the temperature is kept at 100 ℃ for 20 minutes to 30 minutes, and the vacuum is pumped to be within 100 Pa;
B. and (3) heat preservation period: the temperature of the plate is reduced to 80-85 ℃/min, the temperature is kept for 30-40 min, and the vacuum is controlled within 80 Pa;
C. later stage: the temperature of the plate is reduced to 60-70 ℃/min, the temperature is kept for 40-60 min, and the vacuum is controlled within 50 Pa.
8. The method for producing a hot melt type damping sheet cooling and punching apparatus according to claim 7, characterized in that: in the second step of the preparation of the superfine light calcium powder and the preparation of the superfine heavy calcium powder, an asphalt modifier and/or a softener are uniformly mixed and then quickly frozen, the water dosage is 2.5-3.0 times of the total weight of coarse powder, the thickness of materials laid into a mould in the third step is 5.0-6.0 cm, and the cold trap temperature is controlled below-30 ℃ in the fourth freeze-drying process; the processing method of the hot-melt type damping sheet (10) comprises the following steps:
(1) Asphalt softening: putting asphalt into a kneader, heating, softening and stirring to form fluid;
(2) Stirring: sequentially adding an asphalt modifier and a softener into a kneader in sequence for stirring;
(3) Breaking fibers: in the stirring process of the step (2), crushing the fibers, and then putting the crushed fibers into a kneader for continuous stirring;
(4) Adding calcium powder: adding the calcium powder and the mica powder into a kneader for continuous stirring;
(5) Extrusion: after the stirring is finished, the mixture is transferred into an extruder to be extruded and a double-roller pressing sheet is used for producing the hot-melt type damping sheet (10).
CN201710751732.8A 2017-08-28 2017-08-28 Hot-melt type damping sheet cooling and punching device and production method thereof Active CN107351184B (en)

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CN108748421A (en) * 2018-06-06 2018-11-06 芜湖优诺信息科技有限公司 A kind of timber cutter device using ice block cooling
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