CN109501217A - A kind of production method of the vehicle noise insulation pad with antimildew function - Google Patents
A kind of production method of the vehicle noise insulation pad with antimildew function Download PDFInfo
- Publication number
- CN109501217A CN109501217A CN201811115767.3A CN201811115767A CN109501217A CN 109501217 A CN109501217 A CN 109501217A CN 201811115767 A CN201811115767 A CN 201811115767A CN 109501217 A CN109501217 A CN 109501217A
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- China
- Prior art keywords
- mould inhibitor
- molding
- insulation pad
- noise insulation
- vehicle noise
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/18—Thermoforming apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3017—Floor coverings
Abstract
The present invention relates to a kind of production methods of vehicle noise insulation pad with antimildew function, this method mixes filling molding mode using air-flow, mould inhibitor is sprayed in fibrous material first with spray head, then molding, baking oven hot briquetting are filled, it handles to obtain product finally by punching, wherein mould inhibitor is the mould inhibitor with high temperature stability performance.Compared with prior art, the present invention has many advantages, such as simple process, improves production efficiency, is with stronger anti-mold effect and harmless using the mould inhibitor of food-grade.
Description
Technical field
The present invention relates to a kind of production methods of sound insulating pad, more particularly, to a kind of vehicle noise insulation pad with antimildew function
Production method.
Background technique
With being constantly progressive for society, people increasingly focuses on enjoying, higher and higher to the requirement of environmental amenity degree, and automobile multiplies
Smell in main cabin is also one kind of comfort level.
It at this stage, is the odor requirements for meeting automobile passenger compartment inside gadget, the passenger compartment sound insulating pad part of automobile industry needs
Has stronger antimildew function.Part is all made of filling molding at this at present, the material used be cloth bloom, fused fiber and
Sponge particles；And cloth therein bloom be using clothing factory production clothes generate corner, by mechanical shredding at fiber,
Ingredient is mainly natural fiber-cotton；And cotton fiber is a kind of natural fiber for being easy to mildew.It is anti-on the part accordingly made
Mould effect is also barely satisfactory.After part generates mould, has different degrees of musty and generate, be harmful to the human body.
The mode of the antimildew function and sterilizing function that improve sound insulating pad at present has: disinfection component is 1. separately provided, China
204623352 U of patent CN discloses a kind of sound-insulating pad for automobile sun shield with sterilizing function, which is provided with hemisphere
The sterilization block of shape realizes bactericidal effect using the volatilization of sterilization block of material active principle, and the invention structure is more complicated, needs to set
Set the volatilization of corresponding assembly assisting sterilisation block；Chinese patent CN106739248 A disclose a kind of automobile antibacterial sound insulating pad and its
Modified fibre layer is arranged in preparation method in sound insulating pad fibrous layer, and the modified fibre layer is by being modified antibacterial and mouldproof fiber, low melting point
PET fiber, regenerated fiber, zein fiber, chitin fiber are made；The invention has restraining and sterilizing bacteria effect, but the invention needs
Modified fibre layer is prepared separately, increases production process；2. increasing feedstock processing process, Chinese patent CN106004606 A
A kind of band automatic foot-mat with insect-proof function is disclosed, which includes silastic-layer, pure cotton layer, regeneration cotton layer, aluminium alloy
Heat sink layer, modified cyanurotriamide resin layer and anti-slip layer；Wherein, pure cotton layer and regeneration cotton layer are put into insect-proof agent and are impregnated,
It is used after drying, this method increases treatment process, are unfavorable for the raising of manufacture efficiency.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind to have antimildew function
Vehicle noise insulation pad production method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of production method of the vehicle noise insulation pad with antimildew function, this method mix filling molding side using air-flow
Formula sprays to mould inhibitor in fibrous material first with spray head, is then filled molding, baking oven hot briquetting, finally by
Punching handles to obtain product, wherein the mould inhibitor is the mould inhibitor with high temperature stability performance.
The method specifically includes the following steps:
(1) cloth is bloomed, fused fiber and sponge particles are 50~62 ︰, 35~45 ︰ 3~5 investment opener by weight
Interior progress air-flow mixing, obtains composite fibre material；Mould inhibitor is sprayed in the composite fibre material using spray head, is obtained
Uniformly mixed raw material；In storage hair the case then raw material to be sent into vibration storehouse after；
(2) it is closed filling molding mesh mold；
(3) raw material are uniformly taped against on conveyer belt using vibration storehouse, raw material is blown by filling by paving yarn fan
In molding die；After filling finishes, mold is automatically opened, and fiber cake is made；
(4) filled fiber cake is sent in heated oven by conveyer belt, a secondary baking oven mesh mould is arranged at baking oven top
Tool；By baking oven mesh mold clamping anchoring fiber cake, hot air molding is opened, control heating temperature is 180~250 DEG C,
Heating 25~45 seconds, it is to be heated in place after, mold open, fiber cake heating finish.
(5) the fiber cake of heating is conveyed by conveyer belt and is tiled into molding mesh mold, Guan Bi mould, with cold sky
Air cooling sizing, cooling time are 25~45 seconds, obtain molding component；
(6) molding component is placed on die cutting die, molding punching rim charge to get to antimildew function automobile every
Sound pads product.
Spray head is the automatic nozzle that flow is adjustable, controls in the step (1)；In the spray head pressure be 0.6~
0.8MPa。
The dosage of mould inhibitor is that 15~20g mould inhibitor is sprayed on per kilogram composite fibre material in the step (1).
The dosage of mould inhibitor is preferably spray 16g mould inhibitor on per kilogram composite fibre material.
Mould inhibitor is the mixture that potassium sorbate and water are 1:4~2:5 according to weight ratio in the step (1).
The mould inhibitor is the mixture that potassium sorbate and water are preferably 1:4 according to weight ratio
The material of fused fiber described in step (1) is PET staple fiber, when production, plays adhesive effect；
The material that the cloth is bloomed are as follows: CO+PET+PAN；It is clothing factory's leftover bits and pieces shredding into fiber；
The material of the mould inhibitor are as follows: potassium sorbate, decomposition temperature are up to 270 DEG C, and potassium sorbate can effectively inhibit
The activity of mould, saccharomycete and aerobic bacteria, moreover it is possible to prevent the harmful microorganisms such as clostridium botulinum, staphylococcus, salmonella
Growth and breeding.
The loading of fiber cake is 6~8Kg in the filled-type mesh mold.
Vehicle noise insulation pad in the present invention has stronger anti-mold effect；And also ensure that smell, VOC are unchanged.
Potassium sorbate is a kind of at present using very universal food-grade mould inhibitor, is that industry generally acknowledges safer nontoxic
Food additives, intake are automatically drained out after can decomposing in vivo, will not have an impact to human body.
Potassium sorbate heat resistance with higher can fully meet wanting for baking oven high-temperature heating by process certification
It asks；Another be also the food-grade mould inhibitor generally used at present, and sodium benzoate, highest decomposition temperature only has to be spent more 150, and
What fungicidal properties only had potassium sorbate 1/3. is unable to satisfy requirement.
In manufacture craft, after potassium sorbate needs first to be dissolved into water, raw material can be just applied to using the mode of spraying
On, so that it is attached to the surface of fiber, to play mould proof effect.Due to being added on part production line, in production line
Fibrous raw material is transmitted in pipeline and cylinder by way of air-flow, is sprayed out to need to form well-proportioned mist form,
The equipment that can not be influenced in production line runs well.If the droplet form that gushes out, raw fibre bonding will be made agglomerating, from
And it is stuck in transfer canal and cylinder equipment, it causes to stop line failure.
Present invention optimizes the usage amounts of mould inhibitor, are verified by contrived experiment, and mould inhibitor acts on fibrous raw material
On, when dosage is too low, resistance to mould effect is just unable to satisfy the fungicidal properties requirement of part；When dosage is too high, its warp is influenced
Ji property.If fungicidal properties is unqualified, mould mass propagation, accordingly will form musty on corresponding part, influence vehicle smell.
Compared with prior art, the present invention has the following advantages that；
(1) there is stronger anti-mold effect；
(2) present invention is added mould inhibitor in process of production, without in addition carrying out respective handling to raw material, saves
Process improves efficiency.
(3) mould inhibitor now industrially used has certain corrosion and toxicity, the high temperature resistant that the present invention uses to human body
Mould inhibitor is food-grade, non-toxic to humans；While the product that the present invention makes has stronger anti-mold effect, moreover it is possible to really
Smell is protected, VOC is unchanged.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment 1
A kind of production method of the vehicle noise insulation pad with antimildew function, this method mix filling molding side using air-flow
Formula sprays to mould inhibitor in fibrous material first with spray head, is then filled molding, baking oven hot briquetting, finally by
Punching handles to obtain product, wherein the mould inhibitor is the mould inhibitor with high temperature stability performance.Specifically includes the following steps:
(1) cloth is bloomed, fused fiber and sponge particles are to carry out air-flow in 55 ︰, 42 ︰ 3 investment opener to mix by weight
It closes, obtains composite fibre material；Using can flow adjust control automatic nozzle high temperature resistant mould inhibitor is sprayed into composite fibre
In material, uniformly mixed raw material are obtained；In storage hair the case then raw material to be sent into vibration storehouse after；
Wherein, mould inhibitor is the mixture that potassium sorbate and water are 1:4 according to weight ratio；The dosage of mould inhibitor is per kilogram
16g mould inhibitor is sprayed on composite fibre material；Pressure is 0.7MPa in the spray head
(2) it is closed filling molding mesh mold；
(3) raw material are uniformly taped against on conveyer belt using vibration storehouse, raw material is blown by filling by paving yarn fan
In molding die；After filling finishes, mold is automatically opened, and fiber cake is made；The filling of fiber cake in filled-type mesh mold
Amount is 6Kg；
(4) filled fiber cake is sent in heated oven by conveyer belt, a secondary baking oven mesh mould is arranged at baking oven top
Tool；By baking oven mesh mold clamping anchoring fiber cake, hot air molding is opened, control heating temperature is 190 DEG C, heating 35
Second, it is to be heated in place after, mold open, fiber cake heating finish.
(5) the fiber cake of heating is conveyed by conveyer belt and is tiled into molding mesh mold, Guan Bi mould, with cold sky
Air cooling sizing, cooling time are 30 seconds, obtain molding component；
(6) molding component is placed on die cutting die, molding punching rim charge to get to antimildew function automobile every
Sound pads product.
The material of the fused fiber is PET staple fiber, when production, plays adhesive effect；
The material that the cloth is bloomed are as follows: CO+PET+PAN；It is clothing factory's leftover bits and pieces shredding into fiber；
The material of the mould inhibitor are as follows: potassium sorbate, decomposition temperature are up to 270 DEG C, and potassium sorbate can effectively inhibit
The activity of mould, saccharomycete and aerobic bacteria, moreover it is possible to prevent the harmful microorganisms such as clostridium botulinum, staphylococcus, salmonella
Growth and breeding.
The present invention has stronger anti-mold effect, saves process, improves efficiency, the high temperature resistant mould inhibitor that the present invention uses is
Food-grade, instead of the industrial preservative being harmful to the human body, Safety and Environmental Protection is higher.
Embodiment 2
A kind of production method of the vehicle noise insulation pad with antimildew function, this method mix filling molding side using air-flow
Formula sprays to mould inhibitor in fibrous material first with spray head, is then filled molding, baking oven hot briquetting, finally by
Punching handles to obtain product, wherein the mould inhibitor is the mould inhibitor with high temperature stability performance.Specifically includes the following steps:
(1) cloth is bloomed, fused fiber and sponge particles are to carry out air-flow in 50 ︰, 35 ︰ 5 investment opener to mix by weight
It closes, obtains composite fibre material；Using can flow adjust control automatic nozzle high temperature resistant mould inhibitor is sprayed into composite fibre
In material, uniformly mixed raw material are obtained；In storage hair the case then raw material to be sent into vibration storehouse after；
Wherein, mould inhibitor is the mixture that potassium sorbate and water are 1:3 according to weight ratio；The dosage of mould inhibitor is per kilogram
20g mould inhibitor is sprayed on composite fibre material；Pressure is 0.8MPa in the spray head
(2) it is closed filling molding mesh mold；
(3) raw material are uniformly taped against on conveyer belt using vibration storehouse, raw material is blown by filling by paving yarn fan
In molding die；After filling finishes, mold is automatically opened, and fiber cake is made；The filling of fiber cake in filled-type mesh mold
Amount is 8Kg；
(4) filled fiber cake is sent in heated oven by conveyer belt, a secondary baking oven mesh mould is arranged at baking oven top
Tool；By baking oven mesh mold clamping anchoring fiber cake, hot air molding is opened, control heating temperature is 180 DEG C, heating 45
Second, it is to be heated in place after, mold open, fiber cake heating finish.
(5) the fiber cake of heating is conveyed by conveyer belt and is tiled into molding mesh mold, Guan Bi mould, with cold sky
Air cooling sizing, cooling time are 45 seconds, obtain molding component；
(6) molding component is placed on die cutting die, molding punching rim charge to get to antimildew function automobile every
Sound pads product.
The cloth is bloomed, fused fiber and sponge particles material are in the same manner as in Example 1.
Embodiment 3
A kind of production method of the vehicle noise insulation pad with antimildew function, this method mix filling molding side using air-flow
Formula sprays to mould inhibitor in fibrous material first with spray head, is then filled molding, baking oven hot briquetting, finally by
Punching handles to obtain product, wherein the mould inhibitor is the mould inhibitor with high temperature stability performance.Specifically includes the following steps:
(1) cloth is bloomed, fused fiber and sponge particles are to carry out air-flow in 62 ︰, 45 ︰ 3 investment opener to mix by weight
It closes, obtains composite fibre material；Using can flow adjust control automatic nozzle high temperature resistant mould inhibitor is sprayed into composite fibre
In material, uniformly mixed raw material are obtained；In storage hair the case then raw material to be sent into vibration storehouse after；
Wherein, mould inhibitor is the mixture that potassium sorbate and water are 2:5 according to weight ratio；The dosage of mould inhibitor is per kilogram
16g mould inhibitor is sprayed on composite fibre material；Pressure is 0.6MPa in the spray head
(2) it is closed filling molding mesh mold；
(3) raw material are uniformly taped against on conveyer belt using vibration storehouse, raw material is blown by filling by paving yarn fan
In molding die；After filling finishes, mold is automatically opened, and fiber cake is made；The filling of fiber cake in filled-type mesh mold
Amount is 7Kg；
(4) filled fiber cake is sent in heated oven by conveyer belt, a secondary baking oven mesh mould is arranged at baking oven top
Tool；By baking oven mesh mold clamping anchoring fiber cake, hot air molding is opened, control heating temperature is 250 DEG C, heating 25
Second, it is to be heated in place after, mold open, fiber cake heating finish.
(5) the fiber cake of heating is conveyed by conveyer belt and is tiled into molding mesh mold, Guan Bi mould, with cold sky
Air cooling sizing, cooling time are 25 seconds, obtain molding component；
(6) molding component is placed on die cutting die, molding punching rim charge to get to antimildew function automobile every
Sound pads product.
The cloth is bloomed, fused fiber and sponge particles material are in the same manner as in Example 1.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (9)
1. a kind of production method of the vehicle noise insulation pad with antimildew function, this method mixes filling molding mode using air-flow,
It is characterized in that, spraying to mould inhibitor in fibrous material first with spray head, it is then filled molding, baking oven hot briquetting,
It handles to obtain product finally by punching, wherein the mould inhibitor is the mould inhibitor with high temperature stability performance.
2. a kind of production method of vehicle noise insulation pad with antimildew function according to claim 1, which is characterized in that institute
The method stated specifically includes the following steps:
(1) cloth is bloomed, fused fiber and sponge particles be by weight in 50~62 ︰, 35~45 ︰ 3~5 investment opener into
The mixing of promoting the circulation of qi stream, obtains composite fibre material；Mould inhibitor is sprayed in the composite fibre material using spray head, is mixed
Uniform raw material；In storage hair the case then raw material to be sent into vibration storehouse after；
(2) it is closed filling molding mesh mold；
(3) raw material are uniformly taped against on conveyer belt using vibration storehouse, raw material is blown by filling molding by paving yarn fan
In mold；After filling finishes, mold is automatically opened, and fiber cake is made；
(4) filled fiber cake is sent in heated oven by conveyer belt, a secondary baking oven mesh mold is arranged at baking oven top；It will
Baking oven mesh mold clamping anchoring fiber cake opens hot air molding, and control heating temperature is 180~250 DEG C, heating 25
~45 seconds, it is to be heated in place after, mold open, fiber cake heating finish.
(5) the fiber cake of heating is conveyed by conveyer belt and is tiled into molding mesh mold, Guan Bi mould is cold with cold air
But it is formed, cooling time is 25~45 seconds, obtains molding component；
(6) molding component is placed on die cutting die, molding is punched rim charge to get the vehicle noise insulation pad with antimildew function is arrived
Product.
3. a kind of production method of vehicle noise insulation pad with antimildew function according to claim 2, which is characterized in that institute
Stating spray head in step (1) is the automatic nozzle that flow is adjustable, controls；Pressure is 0.6~0.8MPa in the spray head.
4. a kind of production method of vehicle noise insulation pad with antimildew function according to claim 2, which is characterized in that institute
The dosage for stating mould inhibitor in step (1) is that 15~20g mould inhibitor is sprayed on per kilogram composite fibre material.
5. a kind of production method of vehicle noise insulation pad with antimildew function according to claim 4, which is characterized in that institute
The dosage for stating mould inhibitor is that 16g mould inhibitor is sprayed on per kilogram composite fibre material.
6. a kind of production method of vehicle noise insulation pad with antimildew function according to claim 1 or 2, feature exist
In mould inhibitor is the mixture that potassium sorbate and water are 1:4~2:5 according to weight ratio in the step (1).
7. a kind of production method of vehicle noise insulation pad with antimildew function according to claim 6, which is characterized in that institute
Stating mould inhibitor is the mixture that potassium sorbate and water are 1:4 according to weight ratio.
8. a kind of production method of vehicle noise insulation pad with antimildew function according to claim 2, which is characterized in that step
Suddenly fused fiber described in (1) is PET staple fiber.
9. a kind of production method of vehicle noise insulation pad with antimildew function according to claim 2, which is characterized in that institute
The loading of fiber cake is 6~8Kg in the filled-type mesh mold stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811115767.3A CN109501217A (en) | 2018-09-25 | 2018-09-25 | A kind of production method of the vehicle noise insulation pad with antimildew function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811115767.3A CN109501217A (en) | 2018-09-25 | 2018-09-25 | A kind of production method of the vehicle noise insulation pad with antimildew function |
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| Publication Number | Publication Date |
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| CN109501217A true CN109501217A (en) | 2019-03-22 |
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ID=65746026
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| CN201811115767.3A Pending CN109501217A (en) | 2018-09-25 | 2018-09-25 | A kind of production method of the vehicle noise insulation pad with antimildew function |
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Citations (7)
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|---|---|---|---|---|
| CN102182012A (en) * | 2011-05-10 | 2011-09-14 | 宁波兰迪汽配工业有限公司 | Modified cotton fiber felt and application thereof |
| CN103042997A (en) * | 2011-10-16 | 2013-04-17 | 上海新安汽车隔音毡有限公司 | Sponge type sound insulation pad and manufacture method thereof |
| CN103081945A (en) * | 2013-02-01 | 2013-05-08 | 中山大学 | Mildew removal and prevention agent and corresponding mildew removal and prevention method |
| CN103538136A (en) * | 2013-10-17 | 2014-01-29 | 山东骏翔新材料科技发展有限公司 | Polylactic acid composite board and preparation method thereof |
| CN105599319A (en) * | 2014-11-25 | 2016-05-25 | 上海新安汽车隔音毡有限公司 | Method for manufacturing sound insulating pad by filling moulding for automobile |
| CN106739248A (en) * | 2016-11-23 | 2017-05-31 | 郑州源冉生物技术有限公司 | A kind of automobile antibacterial sound insulating pad and preparation method thereof |
| CN206612181U (en) * | 2017-02-28 | 2017-11-07 | 象山艾尔沃特智能科技有限公司 | A kind of liquid mildew preventive automatic spraying equipment |
-
2018
- 2018-09-25 CN CN201811115767.3A patent/CN109501217A/en active Pending
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|---|---|---|---|---|
| CN102182012A (en) * | 2011-05-10 | 2011-09-14 | 宁波兰迪汽配工业有限公司 | Modified cotton fiber felt and application thereof |
| CN103042997A (en) * | 2011-10-16 | 2013-04-17 | 上海新安汽车隔音毡有限公司 | Sponge type sound insulation pad and manufacture method thereof |
| CN103081945A (en) * | 2013-02-01 | 2013-05-08 | 中山大学 | Mildew removal and prevention agent and corresponding mildew removal and prevention method |
| CN103538136A (en) * | 2013-10-17 | 2014-01-29 | 山东骏翔新材料科技发展有限公司 | Polylactic acid composite board and preparation method thereof |
| CN105599319A (en) * | 2014-11-25 | 2016-05-25 | 上海新安汽车隔音毡有限公司 | Method for manufacturing sound insulating pad by filling moulding for automobile |
| CN106739248A (en) * | 2016-11-23 | 2017-05-31 | 郑州源冉生物技术有限公司 | A kind of automobile antibacterial sound insulating pad and preparation method thereof |
| CN206612181U (en) * | 2017-02-28 | 2017-11-07 | 象山艾尔沃特智能科技有限公司 | A kind of liquid mildew preventive automatic spraying equipment |
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