CN110394994A - A kind of moulding technique of semi-solid preparation mica products foil - Google Patents
A kind of moulding technique of semi-solid preparation mica products foil Download PDFInfo
- Publication number
- CN110394994A CN110394994A CN201910639142.5A CN201910639142A CN110394994A CN 110394994 A CN110394994 A CN 110394994A CN 201910639142 A CN201910639142 A CN 201910639142A CN 110394994 A CN110394994 A CN 110394994A
- Authority
- CN
- China
- Prior art keywords
- mold
- foil
- semi
- solid preparation
- vacuum degree
- Prior art date
- 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.)
- Pending
Links
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/006—Degassing moulding material or draining off gas during moulding
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/242—Moulding mineral aggregates bonded with resin, e.g. resin concrete
- B29C67/243—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Insulating Materials (AREA)
- Laminated Bodies (AREA)
- Insulating Bodies (AREA)
Abstract
The present invention provides a kind of moulding technique of semi-solid preparation mica products foil.This method comprises the following steps: 1) blank of semi-solid preparation mica products foil requires to be placed in the mold for being able to carry out sealing according to technique, then sealed mold；Wherein, the positional relationship in blank between each layer is to be parallel to each other two-by-two, and blank includes the mica paper of one or two layers or more, micafolium supporting materials more than one or two layers；2) mold after sealing in step 1) preheated, vacuumized；3) mold after vacuumizing stops preheating, carries out note adhesive to mold, obtains molding semi-solid preparation mica products foil.The present invention forms the moulding technique of completely new semi-solid preparation mica products foil to vacuumize impregnation technology as core, and the semi-solid preparation mica products foil electrical strength that this method is prepared is high, glue is good to reinforcing material dipping effect and product impregnation uniform outer appearance is smooth, plasticity is good, product qualification rate height.
Description
Technical field
The invention belongs to mica products fields, are related to a kind of forming method of mica products foil, in particular to a kind of half is solid
Change the moulding technique of mica products foil.
Background technique
Currently, the semi-solid preparation mica products foil produced in insulating materials industry is preforming property, that is, requiring can
Plasticity (heated soften can be moulded into required shape again), to motor, electrical apparatus industry using when can form again until being fully cured.
For example the more representational application of current semi-solid preparation mica products foil product, the master that electrical machinery plant is used as copper bar rotor are exhausted
Edge.Semi-solid preparation mica products foil is heated (general 130-150 DEG C) on heating platform to soften, and is rolled on copper bar rotor, by design
Insulation thickness is rolled onto the number of plies of needs, then molding is fully cured in pressurization at 180-200 DEG C.Such semi-solid preparation mica products foil produces
The application requirement of product is, under the premise of technical indicator qualification, it is desirable that product appearance is smooth, and glue content is uniform, and plasticity is good, electricity
Gas intensity is high.
Production method of such semi-solid preparation mica products foil in insulating materials industry, by cloud usually on special equipment
Female paper (or piece), the adhesive that supporting material (alkali-free glass cloth, all kinds of films etc.) coats needs is baked afterwards, is cut into needs
Size is folded material by technique requirement, is placed on press, by heating, pressurization, cooling, each link of discharging.Product after discharging
It is required that it is dry and comfortable, firmly without crisp, resin glue is in semi-cured state, and when heated (100 DEG C or more) can soften, with guarantee motor,
Electrical apparatus factory can mould the shape that needs are made, and finally heat again, be pressurized to and be fully cured.It is specifically given birth in insulating materials industry
There are many production methods, key technology first is that compression moulding process, this general process be with heating, plus-pressure, cooling fill
Set and the hydraulic press of function on carry out.Substantially program is that (depending on resin index, F, H grade resins are heating mostly to warm-up phase
To 110-130 DEG C；30-60 minutes)；The plus-pressure stage, (stage was to process by mica paper (or piece), reinforcement on special equipment
The adhesive that material (alkali-free glass cloth, all kinds of films etc.) coats needs passes through the size for baking, being cut into needs, by technique requirement
It is placed it on press after building up mica products foil blank, pressure gradually is applied to it, final pressure is made to rise to unit pressure
5-10kg/cm2, about 20-40 minutes time)；Cooling stage (logical cold water is cooled to room temperature, and pays attention to keeping pressure).At this process
Manage it is improper, usually occur gummosis it is excessive cause production semi-solid preparation mica products foil product glue content reduce or glue do not have
Sufficiently flowing causes the semi-solid preparation mica products foil product glue of production to be unevenly distributed and then leads to quality uneven (thickness is not
Uniformly, performance is uneven), both of which seriously affects the stabilization or raising of semi-solid preparation mica products foil product electrical strength；
It will cause the semi-solid preparation mica products foil product poor plasticity of production or excessively softness make motor, electrical apparatus factory that type be made in modeling again
When operating difficulties etc. and other issues, cause qualification rate very low.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of completely new semi-solid preparation mica products foil at
Type process.This method can effectively solve conventional method and prepare semi-solid preparation mica products foil, because being heated during compression moulding,
Pressurized operation is often difficult to that glue content caused by matching is uneven, glue infiltration is uneven, poor plasticity and other issues.
In order to achieve the above objectives, the present invention provides a kind of moulding techniques of semi-solid preparation mica products foil, including with
Lower step:
1) blank of semi-solid preparation mica products foil is required to be placed in the mold for being able to carry out sealing according to technique, then
Mold is sealed；Wherein, blank includes the mica paper of one or two layers or more, micafolium reinforcing materials more than one or two layers
Expect, the positional relationship in blank between each layer is to be parallel to each other two-by-two；
2) mold after sealing in step 1) preheated, vacuumized；
3) note adhesive then is carried out to mold, obtains molding semi-solid preparation mica products foil.
Adhesive used in the present invention contains epoxy resin.
In above-mentioned moulding technique, it is preferable that this method further includes step 4): the mould after step 3) to be infused to adhesive
It is demoulded after tool is cooling；It is highly preferred that described be cooled to be cooled to room temperature.
In above-mentioned moulding technique, it is preferable that first carry out baking processing to mold before step 1) operation, specifically
Are as follows: it bakes, is then cooled to room temperature stand-by after clean mold is uniformly coated with release agent；It is highly preferred that the baking
Temperature be 120 DEG C -130 DEG C, time of the baking is 20-40min；It is further preferred that the time of the baking
30min。
It forms the blank that blank required for a piece of semi-solid preparation mica products foil is a set system and (forms a piece of semi-solid preparation
The group of mica paper and micafolium supporting material is combined into the blank of a set system in blank required for mica products foil), same
In one mold, the set coefficient for being packed into the blank of mold every time is determined by the thickness specification of the blank of a set system, a set
The thickness specification of the blank of system its want made of a piece of semi-solid preparation mica products foil thickness specification determine.The master of core mold plate
It acts on as the blank of different set systems is isolated.
In above-mentioned moulding technique, it is preferable that the mold further include a piece of or two panels more than core mold plate, core model
Board placing in a mold, is parallel to each other between core mold plate and the blank of semi-solid preparation mica products foil, requires in mold according to technique
The set coefficient of the blank for the semi-solid preparation mica products foil put be it is a set of or two sets or more, with core model between the blanks that difference set is
Plate separates；It is highly preferred that the core mold plate is core model steel plate.For example, by mica paper, mica included by the blank of a set system
The sequence that foil supporting material is required according to technique is successively put in a mold, is then put into core mold plate, then places into one
Mica paper, micafolium supporting material included by the blank of system are covered, core mold plate is placed into, until mold is filled, medium cloud
It is mutually parallel between female paper, micafolium supporting material and core mold plate.
In above-mentioned moulding technique, it is preferable that the mold after step 2) sealing first carries out vacuum before being preheated
Degree test；Specifically: the mold after sealing is vacuumized into 25min, closes the connector that mold is connect with vaccum-pumping equipment, at this time
The vacuum degree of sealed mold is the first vacuum degree, is waited after ten minutes, and the vacuum degree of sealed mold is the second vacuum degree at this time；
When the first vacuum degree is 0.080MPa-0.090MPa, and the difference of the second vacuum degree and the first vacuum degree≤
0.04MPa, mold vacuum monitor is qualified, and mold continues the step 2) preheating；
When the first vacuum degree is not in 0.080MPa-0.090MPa range or the difference of the second vacuum degree and the first vacuum degree
> 0.04MPa, mold vacuum monitor is unqualified, re-starts step 1).
In above-mentioned moulding technique, it is preferable that the temperature preheated in step 2) is higher than epoxy resin in adhesive
30 DEG C -40 DEG C of softening point.
In above-mentioned moulding technique, it is preferable that vacuumizing in step 2) and being evacuated to vacuum degree is 0.080MPa-
0.090MPa, it is highly preferred that vacuumizing to be vacuumized under preheating temperature.
In above-mentioned moulding technique, it is preferable that preheating, vacuumize in step 2) further includes after vacuumizing in preheating temperature
Degree and vacuum degree condition lower retention time are 55-65min；More preferably 1 hour.
Preheat, vacuumize the moisture that can be extracted to greatest extent in mica foil blank and mold inner-cavity, volatilizable impurity,
Air etc. may influence the objectionable impurities of semi-solid preparation micafolium product properties, improve semi-solid preparation mica products foil performance to reach
Purpose.After preheating, vacuumizing under preheating temperature and vacuum degree condition keep a period of time can make micafolium blank, mold with
Baking oven sufficiently exchanges heat, and reaches thermal balance.
In above-mentioned moulding technique, it is preferable that adhesive uses preceding progress normal-temperature vacuum degassing process.
In above-mentioned moulding technique, it is preferable that in step 3) to mold carry out note adhesive note adhesive pressure by
Step is pressurized to 0.6-0.8MPa from 0MPa, and the note adhesive time is 30-50min；More preferably 35min；Wherein, adhesive institute is infused
Moulding tank is preferably with equipment.
In above-mentioned moulding technique, it is preferable that micafolium supporting material includes alkali-free glass cloth, mylar, polyamides
The combination of one or more of imines film.
In above-mentioned moulding technique, it is preferable that adhesive is mica products foil adhesive.
In above-mentioned moulding technique, it is preferable that the blank of semi-solid preparation mica products foil is the cloud for being cut into required size
Female paper, micafolium supporting material.Under normal conditions, the billet size size phase of die size size and semi-solid preparation mica products foil
Matching.
In above-mentioned moulding technique, it is preferable that mold includes upper mold, lower mold, at least two closable companies
Interface, semi-solid preparation mica products foil are placed in lower mold, include that upper mold and lower mold link together by mold sealing；
One in connector connect with vaccum-pumping equipment progress described in vacuumize, one in connector connect progress with glue injection equipment
The note adhesive.
In above-mentioned moulding technique, vacuumizes and any vaccum-pumping equipment progress can be used, such as can just have comprising inhaling
The vaccum-pumping equipment of filter flask, vacuum meter and vacuum pump；Wherein filter flask is connected with mold, vacuum meter is connected with filter flask
It connects, vacuum pump is connected with vacuum meter.
In above-mentioned moulding technique, it is preferable that bake and/or preheating carries out in baking oven.
A kind of preferred version of the moulding technique of semi-solid preparation mica products foil, comprising the following steps:
(1) mold (upper mold, lower mold, core model steel plate) is cleaned out and is baked after being uniformly coated with release agent, baked
Temperature is 120 DEG C -130 DEG C, time 30min, then cooling stand-by；By adhesive carry out normal-temperature vacuum degassing process after to
With；
(2) sequence that the blank of the semi-solid preparation mica products foil met the size requirements is required according to technique is successively placed in
By being then placed in the steel plate core model by 1) handling in the 1) mold of processing, then successively according still further to the sequence of technique requirement
Put the mica products foil blank of second set of system, then place steel plate core model, and so on until blank as defined in dress is enough covers coefficient
Mold is fitted together afterwards and is put into baking oven；
(3) vacuum degree, that is, mold of testing mould is with the presence or absence of loosening, gas leak phenomenon；
(4) preheated mold, preheating temperature are higher than 30 DEG C -40 of epoxy resin softening point in mica products foil adhesive
DEG C, mold vacuumizes under preheating temperature, and being evacuated to vacuum degree is 0.080MPa-0.090MPa, then in the preheating temperature
With kept for 1 hour under vacuum degree condition after prepare note adhesive；Wherein adhesive is mica products foil adhesive；
(5) stop preheating, moulding tank, which gradually pressurizes, is pressurized to 0.6-0.8MPa, time about 35min from 0MPa, carries out mold
Adhesive is infused, molding semi-solid preparation mica products foil is obtained.
The preferred version of the moulding technique of above-mentioned semi-solid preparation mica products foil further includes the reduction of step (6) mold temperature
It is demoulded after to room temperature.
In above-mentioned steps (3), preferably, the vacuum degree of testing mould are as follows: the mold after sealing is vacuumized 25min, is closed
Die closing has the connector connecting with vaccum-pumping equipment, and the vacuum degree of sealed mold is the first vacuum degree at this time, waits after ten minutes,
The vacuum degree of sealed mold is the second vacuum degree at this time；
When the first vacuum degree is 0.080MPa-0.090MPa, and the difference of the second vacuum degree and the first vacuum degree≤
0.04MPa, mold vacuum monitor is qualified, and mold continues the step 2) preheating；
When the first vacuum degree is not in 0.080MPa-0.090MPa range or the difference of the second vacuum degree and the first vacuum degree
> 0.04MPa, mold vacuum monitor is unqualified, re-starts step 1).
The present invention provides a kind of to vacuumize impregnation as the moulding process of the completely new semi-solid preparation mica products foil of core
Method.Compared with prior art, this method has the advantages that
(1) moulding technique of semi-solid preparation mica products foil provided by the invention vacuumizes impregnation technology due to using
It can guarantee that the pumpings of the impurity before blank impregnation such as moisture, air and the volatilizable object in the blanks such as mica paper, glass cloth are true
Empty stage (preferably including the vacuum test stage) and mold warm-up phase are extracted to greatest extent, and mica system greatly improved
The electrical strength of product foil, normality dielectric strength improve about 30% than traditional pressing process.
(2) moulding technique of semi-solid preparation mica products foil provided by the invention had both been taken out mold when infusing adhesive true
It is empty pressure is applied to glue again to guarantee sufficiently flowing and greatly improving resin adhesive liquid to mica paper, glass cloth for resin adhesive liquid
The impregnability of equal blanks significantly reduces existing glue pair when mica products foil product uses traditional pressing process for a long time
Reinforcing material dipping is uneven or gummosis it is uneven caused by product quality uneven (in uneven thickness, performance is uneven),
The problems such as consistency difference.
(3) moulding technique of semi-solid preparation mica products foil provided by the invention vacuumizes impregnation technology due to using
It can guarantee that there is semi-solid preparation mica products foil product obtained suitable glue content to effectively reduce using traditional pressing process
Usually because of starved poor plasticity and in motor, electric appliance caused by gummosis excessively causes mica products foil product to be lost because of glue
The problems such as operating difficulties when type is made, is moulded again by factory.
(4) moulding technique of semi-solid preparation mica products foil provided by the invention, due to semi-solid preparation mica system obtained
Product foil plasticity is fine, and flat appearance degree is good, and the qualification rate of semi-solid preparation mica products foil product is mentioned than traditional pressing process
It is high by about 30% or more.
Detailed description of the invention
Fig. 1 is the operational flowchart of one embodiment of the invention.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Fig. 1 is the operational flowchart of one embodiment of the invention.In a particular embodiment, the molding of semi-solid preparation mica products foil
Process main flow includes: to carry out mold pretreatment 1 and adhesive degassing 2 first, then by pretreated mold
Base 3 is carried out, die-filling 4 is then carried out, mold is subjected to preheating after die-filling and vacuumizes 5, the mold after preheating vacuumizes is infused
Adhesive 6, the adhesive are the adhesive obtained after step adhesive degassing 2, carry out precuring 7 after infusing adhesive, finally
Carry out demoulding 8.
Embodiment 1
A kind of semi-solid preparation mica products foil is present embodiments provided, specific moulding technique is as follows:
1.1 interception size is 0.03mm × 300mm × 500mm alkali-free glass cloth on the table, interception size is
0.055mm × 300mm × 500mm mica paper it is spare (the present embodiment prepare 0.15mm × 300mm × 500mm mica products foil,
Each killinite product foil blank is one layer of 0.03mm × 300mm × 500mm glass cloth collocation, two layers of 0.055mm × 300mm
The mica paper of × 500mm).
1.2, which select mold (internal diameter 505mm × 305mm × 42mm), opens upper mold, after mold cleaning is clean, in lower die
30min is baked after uniformly coating release agent at tool, core model steel plate (502mm × 302mm × 2.5mm), upper mold, connector,
Stoving temperature maintains within the scope of 120 DEG C -125 DEG C, and it is stand-by that the mold after baking is cooled to room temperature, for safe operation and side
Just, mold can be placed on mould bases when specific operation.
1.3 by the alkali-free glass cloth cut out and mica paper by one layer of glass cloth of process sequence requirement, two layers mica paper it is suitable
Successively level is placed in mold sequence, and is separated with blank of the core model steel plate to different set systems, specially a piece of core model steel
Plate, a set of mica products foil blank, a piece of core model steel plate, mica products foil blank ... are until be put into 14 sets of mica products foil bases
Expect and then place into a piece of core model steel plate, wherein a set of mica products foil blank is followed successively by one layer of glass cloth, two layers of mica paper；
It is glass cloth, mica paper, parallel to each other between core model steel plate；Then mold sealing is carried out, specifically: by upper and lower mold knot
The mode for closing position installation sealing strip carries out, and sealing strip is placed in the prefabricated groove of upper/lower die binding site, is closed
Mold tightens bolt, and bolt clipping forcee when being sealed using the gravity pressure and mold of upper mold when upper and lower mold clamping is realized
The sealing of mold.
1.4 pairs of molds carry out vacuum monitor, specifically: it uses clip to clamp mold as the connector of glue-feeder, takes out true
After empty 25min, the connector that mold is vacuumized is clamped, vacuum meter is indicated in 0.080-0.085MPa range, 10min rear mold
Otherwise the vacuum degree of tool, which rises, re-starts step 1.3 until true that is, it is believed that vacuum monitor is qualified no more than 0.002MPa
Until reciprocal of duty cycle test passes.
The mold of vacuum monitor qualification is pushed into baking oven by 1.5；Mold connects as the connector of glue-feeder with moulding tank,
The connector that mold is vacuumized connects as gum outlet with filter flask, and filter flask connects with vacuum meter, and vacuum meter is again and very
Sky pump connects, and connects tight all joints, and checks junction with the presence or absence of loosening, and gas leakage is reconnected if any gas leakage is loosened.
1.6 oven temperatures are maintained higher than 30 DEG C -35 DEG C of epoxy resin softening point in mica products foil adhesive, will be walked
Rapid 1.4 obtained molds are put into the baking oven after heating, and starting vacuum pump and vacuumizing makes the vacuum degree of mold be maintained at 0.080MPa-
0.085MPa, the retention time is progress mold preheating in 1 hour at the temperature and vacuum degree condition, prepares note adhesive.
1.7 close baking oven heating system, open the plastic emitting valve of moulding tank, open the pressure supply pressure reducing valve of moulding tank, and pressure is slow
Slowly gradually increasing makes the slow press-in die of adhesive, the gum outlet of dead mold is pressed from both sides after finding plastic emitting from filter flask, by moulding tank
Interior air pressure is gradually pressurized to 0.6-0.7MPa time about 35min from 0MPa.
1.8 are demoulded, and after mold temperature drops to room temperature, are laid down pressure, are pulled out mold, open upper and lower cover plates, will produce
Product are drawn off.Mold cleaning is clean, release agent is coated, in case next time is used again.
Embodiment 2
A kind of semi-solid preparation mica products foil is present embodiments provided, specific moulding technique is as follows:
2.1 interception size is 0.038mm × 300mm × 500mm mylar on the table, interception size is
0.055mm × 300mm × 500mm mica paper is spare, and (the present embodiment prepares 0.15mm × 300mm × 500mm semi-solid preparation cloud
Female product foil, each killinite product foil blank are that one layer of 0.038mm × 300mm × 500mm mylar is arranged in pairs or groups two layers
0.055mm × 300mm × 510mm mica paper.
2.2, which select mold (internal diameter 505mm × 305mm × 42mm), opens upper mold, after mold cleaning is clean, in lower die
Have, core model steel plate (502mm × 302mm × 2.5mm), upper mold, bake 30min after uniformly coating release agent at connector,
Stoving temperature maintains within the scope of 120 DEG C -130 DEG C, and it is stand-by that the mold after baking is cooled to room temperature, for safe operation and side
Just, mold can be placed on mould bases when specific operation.
2.3 by the mylar cut out and mica paper by a strata membrane of lipoprotein of process sequence requirement, two layers mica paper
Successively level is placed in mold sequence, and is separated with blank of the core model steel plate to different set systems, specially a piece of core model
Steel plate, a set of mica products foil blank, a piece of core model steel plate, mica products foil blank ... are until be put into 14 sets of mica products foils
Then blank places into a piece of core model steel plate, wherein a set of mica products foil blank is followed successively by a strata membrane of lipoprotein, two layers of mica
Paper；Mylar, mica paper are parallel to each other between core model steel plate, then carry out mold sealing, specifically: pass through upper and lower mold
The mode that binding site installs sealing strip additional carries out, and sealing strip is placed in the prefabricated groove of upper/lower die binding site, is closed
Upper mold tightens bolt, and bolt clipping forcee when being sealed using the gravity pressure and mold of mold when upper and lower mold clamping is realized
The sealing of mold.
Mold is carried out vacuum monitor by 2.4, specifically: it uses clip to clamp mold as the connector of glue-feeder, takes out true
After empty 25min, the connector that mold is vacuumized is clamped, vacuum meter is indicated in 0.085-0.090MPa range, 10min rear mold
Otherwise the vacuum degree of tool, which rises, re-starts step 2.3 until true that is, it is believed that vacuum monitor is qualified no more than 0.004MPa
Until reciprocal of duty cycle test passes.
The mold of vacuum monitor qualification is pushed into baking oven by 2.5；Mold connects as the connector of glue-feeder with moulding tank,
The connector that mold is vacuumized connects as gum outlet with filter flask, and filter flask connects with vacuum meter, and vacuum meter is again and very
Sky pump connects, and connects tight all joints, and checks junction with the presence or absence of loosening, and gas leakage is reconnected if any gas leakage is loosened.
2.6 oven temperatures are maintained higher than 35 DEG C -40 DEG C of epoxy resin softening point in mica products foil adhesive, will be walked
Rapid 2.4 obtained molds are put into the baking oven after heating, and starting vacuum pump and vacuumizing makes the vacuum degree of mold be maintained at 0.085MPa-
0.090MPa, the retention time is progress mold preheating in 1 hour at the temperature and vacuum degree condition, prepares note adhesive.
2.7 close baking oven heating system, open the plastic emitting valve of moulding tank, open the pressure supply pressure reducing valve of moulding tank, and pressure is slow
Slowly gradually increasing makes glue press-in die, the gum outlet of dead mold is pressed from both sides after finding plastic emitting from filter flask, by the air in moulding tank
Pressure is gradually pressurized to 0.7-0.8MPa time about 35min from 0MPa.
2.8 are demoulded, and after mold temperature drops to room temperature, are laid down pressure, are pulled out mold, open upper and lower cover plates, will produce
Product are drawn off.Mold cleaning is clean, release agent is coated, in case next time is used again.
Embodiment 3
Thickness, mica content, the adhesive of the semi-solid preparation mica products foil of Examples 1 and 2 offer are be provided
Content, volatile content, plasticity test, dielectric strength test are specific as follows:
Thickness: it is measured with the micrometer that minimum indexing is 0.01mm；
Volatile content h: first the semi-solid preparation mica products foil (hereinafter referred to as sample) of required area is measured at normal temperature
Quality m1, it is then placed in 105 ± 3 DEG C of baking ovens and heats 1h, taking-up, which is put into after drier is cooled to room temperature, is re-weighed m2, then volatilize
Object content h:h=(m1-m2)÷m1× 100%；
Gluing agent content j: the sample after volatile matter will have been surveyed and be put into 500 ± 25 DEG C of high temperature furnace and heated 2h, be cooled to
Room temperature weighing m3, then gluing agent content j:j=(m2-m3)÷m2× 100%；
Mica content y: will survey the sample after volatile content and be put into 500 ± 25 DEG C of high temperature furnace and heated 2h, cooling
The m4 that weighs after glass cloth is carefully removed after to room temperature, then mica content y:y=m4÷m2× 100%；
Plasticity: the semi-solid preparation mica products foil that embodiment 1 and embodiment 2 provide be made 180mm × 80mm ×
The sample of 0.15mm will lack after the steel shaft that sample and diameter are 10 ± 0.5mm is heated to temperature as defined in product in an oven
Amount mylar is wound in steel shaft to demould, then sample is wound on axis rapidly along its length, and is tightened with strap, is put into
Room temperature is cooled in product regulation baking oven after holding 15min and removes strap and steel shaft observation, pipe, which is made, in modeling should keep straight with steel shaft
Diameter is the tubular of diameter, sees whether modeling tubulation bonds and form well.
Dielectric strength: the semi-solid preparation mica products foil that Examples 1 and 2 provide is prepared into 35mm × 240mm × 1mm size
Sample, apply voltage until dielectric breakdown occurs with continuous uniform boosting method, measure the dielectric strength of sample, test result with
The intermediate value of 5 results indicates that unit MV/m takes two effective digitals.
Test result statistics are as follows: thickness 0.13mm-0.17mm, mica content 50%-55%, gluing agent content 28%-
33%, volatile content 3.0%-4.0%, plastic pipe is made and the bonding and good i.e. plasticity of molding is good, dielectric strength is
32MV/m-35MV/m。
According to statistics, semi-solid preparation mica products foil made from traditional pressing process with a thickness of 0.10mm-0.20mm, volatile matter
Content is 2.0%-5.0%, gluing agent content is 19%-35%, mica content 44%-60%, dielectric strength 23MV/m-
29MV/m。
Normality dielectric strength significantly improves 6-8MV/m, improves about 30% than traditional pressing process.This is because by
Vacuum monitor and mold warm-up operation, extracted to greatest extent moisture in the blanks such as mica paper, glass cloth, air and
The impurity such as volatilizable object.
Compared with the semi-solid preparation mica products foil made from traditional compression moulding technique, Example 1 and Example 2 of the present invention is mentioned
The semi-solid preparation mica products foil test Distribution value of confession obviously narrows, test absolute value significantly improves, and shows micafolium product quality
Uniformity consistency significantly improves.
The plasticity for the semi-solid preparation mica products foil that Example 1 and Example 2 of the present invention provides improves.The reason for this is that taking out true
It is normal using traditional pressing process that empty impregnation technology can guarantee that there is mica products foil product suitable glue content to effectively reduce
Starved poor plasticity and in motor, electrical apparatus factory caused by Chang Yinwei gummosis excessively causes mica products foil product to be lost because of glue
When type is made in modeling again the problems such as operating difficulties.
The indices test data and data for the semi-solid preparation mica products foil that Example 1 and Example 2 of the present invention provides
Consistency significantly improves, and test data dispersibility is greatly reduced, and product quality is also more uniform and stablizes.This is because eliminating
Influence of the external factor (impurity such as moisture, air and volatilizable object in blank) to raw material；And when infusing adhesive both
Sufficiently flowing and greatly improving resin adhesive liquid to cloud for resin adhesive liquid can be guaranteed by vacuumizing to mold and applying pressure to glue
The impregnability of the raw material such as female paper, glass cloth significantly reduces mica products foil product and uses traditional pressing process for a long time
When existing glue is uneven to reinforcing material dipping or gummosis it is uneven caused by the uneven (uneven thickness of product quality
It is even, performance is uneven), the problems such as consistency difference.
Take evacuate gum dipping process after due to eliminating manual operation in traditional compression moulding technique when pressure and temperature and
Blank index be often difficult to matching the problem of, in traditional compression moulding technique it is common because pressurization be slower than molding reaction caused by
Poor plasticity, pressurization prior to molding reaction cause glue be lost caused by starved and pressurization it is too fast cause micafolium tearing etc.
The problems such as all greatly improved.
The present embodiment provides the test of the product qualification rate of semi-solid preparation mica products foil, specifically:
A certain number of semi-solid preparation mica products foils are produced using by embodiment 1 and embodiment 2, and carry out product qualification rate
Statistics: the raw material as needed for theoretically 1000 kilograms of mica products foils, except the mica products foil quantity of actual production.That is: qualified
Raw material quality × 100% needed for 1000 kilograms of mica products foils of the mica products foil quality for rate=actually obtain/theoretically.
Qualification rate is stablized in 90-95% according to statistics.
Using the operating experience of the qualification rate heavy dependence operator of mica products foil when traditional compression moulding technique,
That is: stressed speed and temperature are applied and rises the control of speed (control to thermal inertia) and cooperation and operator to adding
The control of time point and the control of the size of thermal inertia is pressed all to produce a very large impact to product qualification rate, so traditional pressing process is past
The master craftsman for enriching skilled operation toward selecting experience operates, and qualification rate is preferably also difficult to break through 80%, once use new person instead
Qualification rate often declines to a great extent.It is average 65% or so for a long time through statistics qualification rate.
Moulding technique provided by the invention is due to using gum dipping process is vacuumized, completely eliminating using tradition compacting
Heavy dependence of the qualification rate to operator's experience when moulding process；It uses instead after evacuating gum dipping process since temperature stabilization (does not have
Press heating thermal inertia), glue negative pressure impregnation mica foil blank (there is no pressurization time point control and with the cooperation of temperature),
So as Example 1 and Example 2 of the present invention qualification rate is very high and the stable higher level in 90-95%.And use tradition pressure
The qualification rate of moulding process processed, semi-solid preparation mica products foil is low and fluctuation is difficult to stablize greatly.
Method provided by the invention to product quality have be obviously improved effect after applying the present invention product plasticity very
Good, flat appearance degree is good, and the qualification rate of micafolium product improves nearly by 30% than traditional pressing process.
Claims (12)
1. a kind of moulding technique of semi-solid preparation mica products foil, comprising the following steps:
1) blank of semi-solid preparation mica products foil is required to be placed in the mold for being able to carry out sealing according to technique, then by mould
Tool sealing；Wherein, blank includes the mica paper of one or two layers or more, micafolium supporting materials more than one or two layers, base
Positional relationship in material between each layer is to be parallel to each other two-by-two；
2) mold after sealing in step 1) preheated, vacuumized；
3) note adhesive then is carried out to mold, obtains molding semi-solid preparation mica products foil.
2. moulding technique according to claim 1, wherein this method further includes step 4): step 3) injecting glue is glutinous
Demoulding after the mold is cooled after agent；Preferably, it is demoulded after being cooled to room temperature.
3. moulding technique according to claim 1, wherein first carried out at baking to mold before step 1) operation
Reason, specifically: it bakes, is then cooled to room temperature stand-by after clean mold is uniformly coated with release agent；Preferably, described
The temperature of baking is 120 DEG C -130 DEG C, and the time of the baking is 20-40min；It is highly preferred that the time of the baking is
30min。
4. moulding technique according to claim 1, wherein mold further include a piece of or two panels more than core mold plate；
Core mold plate is put in a mold, is parallel to each other between core mold plate and the blank of semi-solid preparation mica products foil；
Form the blank that blank required for a piece of semi-solid preparation mica products foil is a set system；It requires to put according to technique in mold
The set coefficient of the blank for the semi-solid preparation mica products foil put be it is a set of or two sets or more, with core mold plate between the blanks that difference set is
It separates, it is preferable that the core mold plate is core model steel plate.
5. moulding technique according to claim 1, wherein the mold after step 2) sealing is before being preheated, first
Carry out vacuum monitor；Specifically: the mold after sealing is vacuumized into 25min, closes the company that mold is connect with vaccum-pumping equipment
Interface, the vacuum degree of sealed mold is the first vacuum degree at this time, is waited after ten minutes, and the vacuum degree of sealed mold is second at this time
Vacuum degree；
When the first vacuum degree is 0.080MPa-0.090MPa, and difference≤0.04MPa of the second vacuum degree and the first vacuum degree, mould
It is qualified to have vacuum monitor, mold continues the step 2) preheating；
When the first vacuum degree is not in the range of 0.080MPa-0.090MPa or the difference of the second vacuum degree and the first vacuum degree
> 0.04MPa, mold vacuum monitor is unqualified, re-starts step 1).
6. moulding technique according to claim 1, wherein the temperature of preheating described in step 2) is higher than the glue
30 DEG C -40 DEG C of softening point of epoxy resin in glutinous agent.
7. moulding technique according to claim 1 or 6, wherein vacuumized described in step 2) and be evacuated to vacuum degree and be
0.080MPa-0.090MPa；Preferably, described to vacuumize to be vacuumized under preheating temperature.
8. according to claim 1,6,7 described in any item moulding techniques, wherein preheat, vacuumize described in step 2)
It further include keeping 55-65min under preheating temperature and vacuum degree condition after vacuumizing；Preferably 1 hour.
9. moulding technique according to claim 1, wherein the adhesive uses at preceding progress normal-temperature vacuum degassing
Reason.
10. moulding technique according to claim 1, wherein the step 3) note for carrying out note adhesive to mold
Adhesive pressure is gradually pressurized to 0.6-0.8MPa from 0MPa, and the note adhesive time is 30-50min；Preferably, when infusing adhesive
Between be 35min；Preferably, note adhesive device therefor is moulding tank.
11. moulding technique according to claim 1, wherein the micafolium supporting material include alkali-free glass cloth,
The combination of one or more of mylar, Kapton.
12. moulding technique according to claim 1, wherein the adhesive is mica products foil adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639142.5A CN110394994A (en) | 2019-07-16 | 2019-07-16 | A kind of moulding technique of semi-solid preparation mica products foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910639142.5A CN110394994A (en) | 2019-07-16 | 2019-07-16 | A kind of moulding technique of semi-solid preparation mica products foil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110394994A true CN110394994A (en) | 2019-11-01 |
Family
ID=68325592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910639142.5A Pending CN110394994A (en) | 2019-07-16 | 2019-07-16 | A kind of moulding technique of semi-solid preparation mica products foil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110394994A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459362A (en) * | 2021-07-02 | 2021-10-01 | 和利时(苏州)自控技术有限公司 | Vacuum glue injection molding process method |
| CN115814302A (en) * | 2021-09-29 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Processing method of box body assembly and box body assembly |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002330562A (en) * | 2001-04-27 | 2002-11-15 | Toshiba Corp | Coil for rotary electric machine, and mica tape used for insulation of the coil |
| CN1819408A (en) * | 2006-01-23 | 2006-08-16 | 株洲时代新材料科技股份有限公司 | Insulating structure and production for vacuum-pressure immersing process of high-voltage motor |
| CN101211677A (en) * | 2006-12-28 | 2008-07-02 | 上海同立电工材料有限公司 | Single-side reinforced small amount epoxy glue mica tape and method of manufacture and its uses |
| CN102254653A (en) * | 2011-04-28 | 2011-11-23 | 江苏冰城电材股份有限公司 | Method for manufacturing mica tape with surface treatment by plasma |
| CN102329431A (en) * | 2011-08-02 | 2012-01-25 | 华东理工大学 | Preparation method of epoxy resin composite material strengthened by in situ growth of CNT (carbon nano tube) on surface of quartz fibre |
| CN202695026U (en) * | 2012-06-27 | 2013-01-23 | 四川东材科技集团股份有限公司 | Double-sided polyester film mica foil |
| WO2015106482A1 (en) * | 2014-01-20 | 2015-07-23 | 宁波大成新材料股份有限公司 | Preparation method for high-performance fibre composite article |
| CN106935335A (en) * | 2015-12-31 | 2017-07-07 | 株洲时代新材料科技股份有限公司 | A kind of resin-rich mica tape and preparation method thereof |
| CN109360699A (en) * | 2018-10-22 | 2019-02-19 | 株洲时代电气绝缘有限责任公司 | One kind expoxy glass dry mica paper tape of type containing curing agent and preparation method thereof |
| EP3475956A1 (en) * | 2016-06-28 | 2019-05-01 | Huntsmann Advanced Materials Licensing (Switzerland) GmbH | Electrical insulation system based on epoxy resins for generators and motors |
-
2019
- 2019-07-16 CN CN201910639142.5A patent/CN110394994A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002330562A (en) * | 2001-04-27 | 2002-11-15 | Toshiba Corp | Coil for rotary electric machine, and mica tape used for insulation of the coil |
| CN1819408A (en) * | 2006-01-23 | 2006-08-16 | 株洲时代新材料科技股份有限公司 | Insulating structure and production for vacuum-pressure immersing process of high-voltage motor |
| CN101211677A (en) * | 2006-12-28 | 2008-07-02 | 上海同立电工材料有限公司 | Single-side reinforced small amount epoxy glue mica tape and method of manufacture and its uses |
| CN102254653A (en) * | 2011-04-28 | 2011-11-23 | 江苏冰城电材股份有限公司 | Method for manufacturing mica tape with surface treatment by plasma |
| CN102329431A (en) * | 2011-08-02 | 2012-01-25 | 华东理工大学 | Preparation method of epoxy resin composite material strengthened by in situ growth of CNT (carbon nano tube) on surface of quartz fibre |
| CN202695026U (en) * | 2012-06-27 | 2013-01-23 | 四川东材科技集团股份有限公司 | Double-sided polyester film mica foil |
| WO2015106482A1 (en) * | 2014-01-20 | 2015-07-23 | 宁波大成新材料股份有限公司 | Preparation method for high-performance fibre composite article |
| CN106935335A (en) * | 2015-12-31 | 2017-07-07 | 株洲时代新材料科技股份有限公司 | A kind of resin-rich mica tape and preparation method thereof |
| EP3475956A1 (en) * | 2016-06-28 | 2019-05-01 | Huntsmann Advanced Materials Licensing (Switzerland) GmbH | Electrical insulation system based on epoxy resins for generators and motors |
| CN109360699A (en) * | 2018-10-22 | 2019-02-19 | 株洲时代电气绝缘有限责任公司 | One kind expoxy glass dry mica paper tape of type containing curing agent and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459362A (en) * | 2021-07-02 | 2021-10-01 | 和利时(苏州)自控技术有限公司 | Vacuum glue injection molding process method |
| CN115814302A (en) * | 2021-09-29 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Processing method of box body assembly and box body assembly |
| CN115814302B (en) * | 2021-09-29 | 2024-06-04 | 宁德时代新能源科技股份有限公司 | Processing method of box body assembly and box body assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103434141B (en) | The forming method of the box-like reinforced structure of a kind of carbon fibre composite | |
| CN110394994A (en) | A kind of moulding technique of semi-solid preparation mica products foil | |
| CN104200938B (en) | A kind of processing method of high-voltage capacitance formula dry sleeve | |
| WO2014005397A1 (en) | Carbon fiber composite arm support, method for producing same and concrete pump car comprising same | |
| US2970936A (en) | Insulated electrical coils | |
| CN109397724B (en) | High-temperature-resistant composite material and high-temperature thermal expansion forming method thereof | |
| CN100561609C (en) | The manufacture method of high adhesive self-pasting dual-glass silk-covered film agglomerated copper flat line | |
| CN213056086U (en) | Forming die of unmanned aerial vehicle combined material spare part | |
| CN110091521B (en) | Forming method of composite material component and composite material component | |
| CN109049761A (en) | Carbon fibre composite vacuum impregnation and hot-press solidifying forming method | |
| CN109591324A (en) | The forming method of carbon fiber product | |
| CN106601470B (en) | Command bundle rods for nuclear reactors driving mechanism electromagnetic coil and preparation method thereof | |
| CN112454950B (en) | Technological skin, wave-absorbing composite material part and preparation method thereof | |
| CN109203516A (en) | A kind of manufacturing method of wind electricity blade | |
| CN110901126B (en) | Auxiliary shaping process method for fully-cured aramid fiber honeycomb | |
| CN104494027A (en) | Double-vacuum bag microwave coagulation method for carbon fiber composite material part | |
| CN105655069B (en) | Impregnation method for dry capacitance type high-voltage bushing core | |
| CN106393733A (en) | Manufacturing method of solid wall composite material radar cover | |
| CN110931187A (en) | Preparation method of composite insulating pipe | |
| CN115503264A (en) | High-tensile-strength insulating partition used in low-temperature environment and preparation method thereof | |
| CN109177236A (en) | A kind of abnormity composite material battery case molding die and forming method | |
| CN206351517U (en) | Vacuum bag pressing mould | |
| CN113858539A (en) | Forming process of outdoor epoxy resin composite material product | |
| CN102831990A (en) | Method of pressing B stage resin mica product foil | |
| CN112848368B (en) | Thermal diaphragm preforming method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191101 |