CN105538556A - Mold cleaning sheet - Google Patents
Mold cleaning sheet Download PDFInfo
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- CN105538556A CN105538556A CN201510971755.0A CN201510971755A CN105538556A CN 105538556 A CN105538556 A CN 105538556A CN 201510971755 A CN201510971755 A CN 201510971755A CN 105538556 A CN105538556 A CN 105538556A
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- Prior art keywords
- mould cleaning
- cleaning member
- mould
- width
- cavity
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Classifications
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- 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
- B29C33/70—Maintenance
- B29C33/72—Cleaning
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1753—Cleaning or purging, e.g. of the injection unit
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- Moulds For Moulding Plastics Or The Like (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
Abstract
The present invention relates to a mold cleaning sheet for cleaning a mold having a cavity which has an opening in a shape of an oval or a quadrangle, in which the mold cleaning sheet includes a sheet-like base material and a plurality of belt-shaped mold cleaning members formed on at least one side of the sheet-like base material, formed from an unvulcanized rubber composition or a thermosetting resin composition, and disposed in a pattern that the plurality of belt-shaped mold cleaning members are aligned in parallel with a clearance on the base material; each of the mold cleaning members is cut into a plurality of blocks in a longitudinal direction of the mold cleaning members at predetermined intervals to form a column including the plurality of blocks; each of the blocks has a length of from 3 mm to 50mm, a clearance between neighboring blocks in the column including the plurality of blocks is 0.1 mm or more and is not larger than a width of the mold cleaning members, a clearance between neighboring mold cleaning members in a direction of the width of the mold cleaning members is not smaller than 1/2 of the width of the mold cleaning members and not larger than the width of the mold cleaning members, and the width of the mold cleaning members is 1 mm or more and not larger than 4/5 of a breadth of the opening of the cavity.
Description
The application is the applying date is on September 14th, 2012, denomination of invention is " mould cleaning foil " and application number is the divisional application of the Chinese invention patent application of 201210342468.X.
Technical field
The present invention relates to a kind of mould cleaning foil used when the die surface of cleaning mold.
Background technology
Using resin by the process of transfer moudling encapsulated semiconductor device, usually perform the resin molded work using mould repeatedly.Along with the increase of the repetition number (number of impact) of resin molded work, the pollutant accumulation of the composition such as oozed out from resin, burr and dust is on the surface of the die surface of mould, particularly cavity.When being removed from mould by moulded products, this pollutant makes the ability discharging moulded products reduce, and makes the surface of moulded products roughening.Therefore the cleaning mold surface (comprising the surface of cavity) when molding operation repeats every given number (number of impact) is needed.
As the method for cleaning mold surface, propose the method (such as participating in patent document 1 or 2) using mould cleaning foil.As shown in figure 14, this mould cleaning foil is the sheet comprising flat substrates 1 and multiple belt mould cleaning member 20, and to be wherein formed in the one or both sides (in Figure 14 for side) of flat substrates 1 upper and aim at abreast with the gap between adjacent component for multiple belt mould cleaning member 20.When cleaning mold, between upper and lower mould cleaning foil being clipped in mould, and in this condition, by mold cramping.Thus, the mould cleaning member 20 of mould cleaning foil is filled in cavity.Now, the air in cavity from the gap between adjacent belt mould cleaning member 20 out, and the whole inside of mould cleaning member 20 cavity filling.And it is molded to perform heating in this case, thus makes the pollutant on the surface of cavity adhere to mould cleaning member 20.Afterwards, mould cleaning foil is removed from mould, and pollutant is removed from die surface (surface of cavity) together with mould cleaning member 20.
Patent document 1:JP-A-2007-196586
Patent document 2:JP-A-2008-132759
Summary of the invention
Although those mould cleaning foils have guaranteed air successfully to shift out from cavity inside by being formed as the gap of shifting out for air as mentioned above, and obtain the excellent performance (clean-up performance) be filled into by mould cleaning member 20 in cavity thus, but they can stand wrinkling and warpage in some cases.When using this mould cleaning foil cleaning mold, the size that there is mould cleaning foil does not reach die size or mould cleaning foil through situation by bending.In this case, there is the deterioration of mould cleaning member 20 to the filling capacity in cavity, cause cleaning deficiently.
In these cases, the present inventor has attempted finding reason that is wrinkling and warpage.As a result, the present inventor has been found that: this reason is the Length Contraction of belt mould cleaning member 20 along them, and the size of such as mould cleaning member 20, shape and constituent are depended in this contraction.More specifically, the present inventor finds, although perform the making of mould cleaning foil by unvulcanized rubber composition or heat cured resin composition being molded as belt mould cleaning member 20 on the one or both sides of flat substrates 1, but by mould cleaning foil from after mould removes, thermal stress residual in the mould cleaning member 20 produced makes belt mould cleaning member 20 along their Length Contraction; As a result, in mould cleaning foil, there is wrinkling and warpage.
Consider these situations and carried out the present invention, and therefore the object of this invention is to provide a kind of mould cleaning foil, it can not stand wrinkling or warpage, and has high clean-up performance.
In order to achieve the above object, the present invention relates to following (1) to (5) item.
(1) a mould cleaning foil, has the mould of cavity for cleaner, described cavity has the opening of the shape of ellipse or quadrangle,
Wherein said mould cleaning foil comprises:
Flat substrates; With
Multiple belt mould cleaning member, it is formed at least side of flat substrates, is formed by unvulcanized rubber composition or heat cured resin composition, and is configured to the pattern aimed at abreast with the gap on base material by multiple belt mould cleaning member,
Each mould cleaning member is cut into multiple pieces with predetermined space on the longitudinal direction of mould cleaning member, to form the row comprising multiple pieces,
Each block has the length from 3mm to 50mm,
Gap between block adjacent in these row comprising multiple pieces is 0.1mm or larger, and is not more than the width of mould cleaning member,
Gap on the width along mould cleaning member between adjacent molds cleaning member is not less than 1/2 of the width of mould cleaning member, and is not more than the width of mould cleaning member, and
The width of mould cleaning member is 1mm or larger, and is not more than 4/5 of the banner of the opening of cavity.
(2) according to the mould cleaning foil of (1), wherein flat substrates is cloth.
(3) according to the mould cleaning foil of (2), wherein cloth comprises long stapled fabric or supatex fabric.
(4) according to the mould cleaning foil of (3), wherein supatex fabric is spunbonded non-woven fabrics.
(5) basis (1) is to the mould cleaning foil of any one in (4), and wherein flat substrates stands embossed.
The present inventor repeatedly have studied how to prevent their wrinkling and warpages, multiple belt mould cleaning members that each gap had between adjacent component in above-mentioned mould cleaning foil is aimed at abreast while the high cleaning capacity using above-mentioned mould cleaning foil.Result, the present inventor has been found that, when each belt mould cleaning member being cut with predetermined space in their longitudinal direction thus forming the row comprising multiple pieces, the contraction caused by the thermal stress remained in mould cleaning member is not by the mould cleaning member entirety burden of band shape, but be distributed in each piece, thus achieve to reduce and shrink.In addition, we repeatedly have studied the suitable and correct size of block mold cleaning member and other.Result, inventor has been found that, when being in the scope dropping on 3 to 50mm by the length adjustment of each block, and in addition, by the gap adjustment between block adjacent in these row comprising multiple pieces be have 0.1mm or larger and be not more than the size of the width of mould cleaning member time, in addition by the gap adjustment between mould cleaning member adjacent in the mould cleaning member aimed in the width direction be have the width being not less than each mould cleaning member 1/2 and be not more than the size of the width of each mould cleaning member time and by the width adjusting of each mould cleaning member be in addition have 1mm or larger and be not more than the size of 4/5 of the banner of the ellipse of cavity or the opening of quadrangle (rectangle or square) shape time, make to shrink suitably and correct, wrinkling or warpage can not be there is in mould cleaning foil, and improve clean-up performance, thus achieve the present invention.
In this mould cleaning foil, multiple belt mould cleaning member is formed at least side of flat substrates, and the longitudinal direction along them is cut with predetermined space, thus form the row comprising multiple pieces, and be drop in the scope of 3 to 50mm by the length adjustment of each block.As a result, the contraction occurred in each belt mould cleaning member can be dispensed in each piece and to be reduced, and can prevent the wrinkling and warpage of this mould cleaning foil thus.And in addition, in every row mould cleaning member, between the adjacent block mold cleaning member of these row, form gap.Therefore, this gap with the gap (previously known gap) between the adjacent molds cleaning member aimed in the width direction can together be used as cleaning mold time for shifting out the gap of air, and the amount in the gap for shifting out air is increased.In addition, be that there is 0.1mm or larger and be not more than the size of the width of each mould cleaning member by the gap adjustment in each row comprising multiple pieces between adjacent block, and in addition, by the gap adjustment between mould cleaning member adjacent in the mould cleaning member aimed in the width direction be have the width being not less than each mould cleaning member 1/2 and be not more than the size of the width of each mould cleaning member; As a result, suitably perform air and shift out, and this suitable air shifts out, combines and do not produce wrinkling and warpage, makes to improve mould cleaning member to the filling performance in cavity, and makes clean-up performance improve further.In addition, be that there is 1mm or larger and be not more than the size with 4/5 of the width of the opening of ellipse or quadrangle form of cavity by the width adjusting of each mould cleaning member, even and if therefore the opening size of cavity is little, be also only partly filled with mould cleaning member; As a result, this mould cleaning foil shows good ability in being shifted out from cavity inside by air, and therefore mould cleaning member is filled in the performance (clean-up performance) in cavity outstanding.
When flat substrates is cloth, its rough surface, and therefore, it is possible to improve the effect of fixed mould cleaning member.Therefore, it is possible to strengthen the adhesion between flat substrates and mould cleaning member.
When cloth comprises long stapled fabric or supatex fabric specifically, the surface roughness of flat substrates is suitable and correct, and the effect of fixed mould cleaning member can be made suitable and correct.
In addition, when supatex fabric is spunbonded non-woven fabrics, this supatex fabric is relatively short of on the directional performance of tensile strength, and easily absorbs and slow down the stress applied when carrying out heating molded; As a result, this fabric opposing sheet carried out when heating molded breaks.And in addition, this fabric causes, when peeling off (demoulding) from mould, sheet does not occur and breaks, and makes stripping (demoulding) work simple and easy.
In addition, when flat substrates stands embossed, because flat substrates also can have rough surface, so which show the increase of the effect of fixed mould cleaning member, and the adhesion of flat substrates to mould cleaning member can be strengthened.
Accompanying drawing explanation
Fig. 1 is the oblique perspective view of the first embodiment schematically showing this mould cleaning foil.
Fig. 2 is the oblique perspective view of the second embodiment schematically showing this mould cleaning foil.
Fig. 3 is the oblique perspective view of the 3rd embodiment schematically showing this mould cleaning foil.
Fig. 4 a to 4e is the figure of the various examples of the shape of the section schematically showing mould cleaning member, wherein in the plane vertical with the longitudinal direction of mould cleaning member, sees this section.
Fig. 5 a to 5c is the figure of the various examples of the shape of another section schematically showing mould cleaning member, wherein in the plane of the longitudinal direction along mould cleaning member, sees this section.
Fig. 6 is the plane of an example of the structure pattern schematically showing mould cleaning member.
Fig. 7 a and 7b is the plane of other example of the structure pattern schematically showing mould cleaning member.
Fig. 8 a and 8b is the plane of other example of the structure pattern schematically showing mould cleaning member.
Fig. 9 is the plane of the further example of the structure pattern schematically showing mould cleaning member.
Figure 10 a and 10b is the plane of the further again example of the structure pattern schematically showing mould cleaning member.
Figure 11 a and 11b is the plane of other example of the structure pattern schematically showing mould cleaning member.
Figure 12 a to 12e is the figure of other examples various of the shape of the section schematically showing mould cleaning member, wherein in the plane vertical with the longitudinal direction of mould cleaning member, sees this section.
Figure 13 a to 13c is the figure of other examples various of the shape of another section schematically showing mould cleaning member, wherein in the plane of the longitudinal direction along mould cleaning member, sees this section.
Figure 14 is the oblique perspective view schematically showing previously known mould cleaning foil.
The explanation of Reference numeral and symbol
1 flat substrates
2 mould cleaning members
X width
Y length
A and b gap
Detailed description of the invention
Next, embodiments of the present invention are described in detail based on accompanying drawing.
Fig. 1 shows the first embodiment of this mould cleaning foil.Mould cleaning foil is according to the present embodiment the sheet for cleaning mold, each cavity formed in a mold has the opening of ellipse or quadrangle (rectangle or square) shape, and this mould cleaning foil has multiple block mold cleaning member 2 on the side of flat substrates 1, wherein multiple block mold cleaning member 2 is made up of unvulcanized rubber composition or heat cured resin composition and is configured to row and column with gap a and gap b regularly.More specifically, in mould cleaning foil according to the present embodiment, each belt mould cleaning member 20 of previously known mould cleaning foil (see Figure 14) is divided into multiple pieces by the longitudinal direction along mould cleaning member, and between adjacent block, there is predetermined gap, and form the row comprising these blocks.In addition, the length Y (each block size in a longitudinal direction) of each block mold cleaning member 2 is adjusted to and drops on from the scope of 3 to 50mm, gap a in each row comprising multiple block mold cleaning member 2 between adjacent block is adjusted to 0.1mm or larger and be not more than the width X of each mould cleaning member 2, between adjacent mould cleaning member 2, be adjusted to 1/2 of the width X being not less than each mould cleaning member along the gap b of its width and be not more than the width X of each mould cleaning member, and the width X of each mould cleaning member 2 is adjusted to 1mm or larger and be not more than 4/5 of the banner (size less in the size from side to opposite side of oval or quadrangle) of the ellipse of cavity or the opening of quadrangle form.Pattern mould cleaning member 2 being configured to have this size is principal character of the present invention.In addition, in the present embodiment, each block entirety is formed as the section shape that has in perpendicular to the plane of longitudinal direction as dome.
More specifically, in mould cleaning foil according to the present embodiment, as mentioned above, by each belt mould cleaning member 20 is divided into multiple pieces along the longitudinal direction of mould cleaning member, and between adjacent block, there is gap, the contraction of the longitudinal direction (column direction of block) of mould cleaning member 2 is dispensed in each piece, which results in the control of the contraction to mould cleaning foil entirety.When performing the up-sizing of mould cleaning foil in the object in order to increase production capacity, this control is more effective.In addition, drop in the scope of 3 to 50mm by the length Y of each block is adjusted to, prevent from, in mould cleaning foil, wrinkling and warpage occurs.In addition, according to more effectively preventing wrinkling and viewpoint that is warpage, the length Y of each block is made to be suitable in the scope of 10 to 40mm.And in addition, in normal circumstances, the height H of block is adjusted to drops in the scope of 1 to 5mm.
In addition, as mentioned above, with previously known mould cleaning foil (see Figure 14) in the same manner, mould cleaning foil according to the present embodiment, except the gap b between adjacent molds cleaning member 20 on the width of mould cleaning member 2, has the gap a formed on the longitudinal direction of each mould cleaning member 20 between adjacent block.In addition, gap a and gap b is adjusted to respectively and drops in above-mentioned scope, obtains suitable and correct air thus shift out when cleaning mold.And suitable and correct air shifts out in conjunction with the wrinkling and die surface close contact preventing making to be easy to make mould cleaning foil and mould that is warpage, improves mould cleaning member 2 to the filling performance in cavity, and provides the improvement of clean-up performance.
In addition, in mould cleaning foil according to the present embodiment, be that there is 1mm or larger and be not more than the size of 4/5 of the banner of the ellipse of cavity or the opening of quadrangle form by the width adjusting of each mould cleaning member 2, even if the opening size of cavity is little thus, be also only partly filled with mould cleaning member 2; As a result, this mould cleaning foil can show good ability in being shifted out from cavity inside by air, and therefore outstanding in mould cleaning member to the filling performance (clean-up performance) in cavity.By way of parenthesis, according to the viewpoint loading performance, the preferable range of the width X of block is 2/5 to 4/5 of the banner of the ellipse of cavity or the opening of quadrangle form.In addition, according to the viewpoint of the contraction of minimizing mould cleaning member 2, the width X of each mould cleaning member 2 is adjusted to and is no more than 50mm.
In addition, in mould cleaning foil according to the present embodiment, gap a and b between adjacent molds cleaning member 2 is formed as lattice, this make with being easy to longitudinal direction with horizontal direction ground cutting die cleaning foil, and allow to adapt to the size of cleaned mould and use the mould cleaning foil being cut into suitable and correct size.
Provide more detailed explanation below.The example forming the material of flat substrates 1 comprises paper (hand-built Japan paper, the paper manufactured in the mode in west, synthetic paper etc.), cloth (fabric, supatex fabric, woven cloth etc.) and plastics (PETG, polyimides, PEN, polyamide, polypropylene etc.).For the thickness of flat substrates 1, use the sheet with the thickness of 0.05mm to 1mm.In those materials, according to producing fixed mould cleaning member 2 and strengthening their viewpoints with the effect of the adhesion of mould cleaning member 2, supatex fabric, stand embossed material, be treated to the material with rough surface, the material processed by perforation, porous material etc. be preferred.In supatex fabric, according to the viewpoint of its outstanding fracture strength, spunbonded non-woven fabrics is better than other supatex fabric.
On the other hand, by the inorganic filler of such as Cab-O-sil or titanium oxide is mixed in unvulcanized rubber or heat cured resin, prepare for forming the unvulcanized rubber composition of mould cleaning member 2 or heat cured resin composition.Based on unvulcanized rubber or the heat cured resin of 100 weight portions, the content of Cab-O-sil is about 40 to about 50 weight portions, and the content of titanium oxide is about 5 weight portions.In addition, also other composition suitably can be mixed in this synthetic as required.
The example of unvulcanized rubber comprises natural rubber (NR), chloroprene rubber (CR), butadiene rubber (BR), nitrile butadiene rubber (NBR), EPDR (EPDM), EP rubbers (EPM), butadiene-styrene rubber (SBR), polyisoprene rubber (IR), isobutene isoprene rubber (IIR), silicon rubber (such as Q) and fluoroelastomer (such as FKM).
The example of heat cured resin comprises melamine resin.
The color of mould cleaning member 2 does not have concrete restriction, but preferably they have light color, such as white or grey.This is because the pollutant that will remove from the cavity of mould has the dark color of such as black, and therefore the light color of mould cleaning member 2 makes easily whether adhered to mould cleaning member 2 by visual inspection pollutant.In order to make mould cleaning member have light color, Chinese white etc. is added into unvulcanized synthetic or heat cured resin composition.
Mould cleaning foil such as can manufacture in the following manner.First, use continuous mixer or batch agitator unvulcanized rubber composition or heat cured resin composition to be stirred, be then laid on the side of flat substrates 1.Subsequently, the mould with the recess corresponding with the structure pattern of mould cleaning member 2 is used to pressurize to the synthetic be laid on base material.Thus, on the side of flat substrates 1, form the mould cleaning member 2 according to structure pattern in an integrated manner.After demolding, the material of entirety batched or cut into appropriate size.
By way of parenthesis, although form mould cleaning member 2 in the above-described embodiment on the only side of flat substrates 1, they can be formed on the both sides of flat substrates 1 as shown in Figure 2.On the other hand, as shown in Figure 3, block mold cleaning member 2 on the front surface can be configured to and different (the differing 90 ° in figure 3) on rear surface along its length.
In addition, although each mould cleaning member 2 entirety is formed as the section shape had in the plane of the longitudinal direction perpendicular to mould cleaning member 2 as dome, it can have other section shape any.Such as, section can be configured as shown in fig. 4 a as dome and as trapezoidal in bottom in top, or section can be configured as in top as shown in Figure 4 b as dome and as rectangle in bottom.In addition, section can be leg-of-mutton form as illustrated in fig. 4 c, or is trapezoidal form as shown in figure 4d, or is semicircular form as shown in fig 4e.
In these mould cleaning members, those mould cleaning members shown in Fig. 4 a to 4c and Fig. 4 e are formed as being uneven on top, and therefore, even if at the opening hour of cavity, the uneven top of mould cleaning member 2 also makes the opening being easy to partly cavity filling, and shifting out of air in cavity inside is easier.As a result, more improve the performance loading mould cleaning material, and also improve the performance of clean cavity inside.
When paying close attention to mould cleaning member 2 further, its section shape in the plane of the longitudinal direction along mould cleaning member 2 can be rectangle (make both ends of the surface in a longitudinal direction perpendicular to flat substrates 1 and its periphery is configured as the form at right angle) as shown in Figure 5 a, or can be trapezoidally (make both ends of the surface in a longitudinal direction angled as shown in Figure 5 b, and its periphery is configured as the form at angle), or can be the form (making the periphery of end face also by the form of rounding) making both ends of the surface in a longitudinal direction be configured as curved surface as shown in Figure 5 c.By way of parenthesis, in the above-mentioned embodiment shown in Fig. 1 to Fig. 3, show the section shape in the plane on the longitudinal direction of each mould cleaning member 2 in fig 5 a.
When as shown in Fig. 4 a, Fig. 4 c to Fig. 4 e, Fig. 5 b and Fig. 5 c, for the side of the mould cleaning member had and the surface of end face and flat substrates 1 mould cleaning foil out of square, perform the width X of mould cleaning member 2 and the measurement of length Y and gap a and b at the root place (on upside) of mould cleaning member.
For the structure pattern of mould cleaning member 2, its example comprises the structure pattern of its plane as shown in Fig. 6 to 11.By way of parenthesis, the root (upside) of mould cleaning member 2 is illustrated in these Fig. 6 to 11.More specifically, structure pattern can be the pattern be made up of the square being configured to row and column regularly as shown in Figure 6, or by being configured to row and column regularly and their length direction orientation or the as shown in Figure 7b flatly pattern that forms of the ellipse (width X: length Y=1:10) of orientation vertically as shown in Figure 7a, or by being configured to row and column regularly and their length direction orientation or the as shown in Figure 8 b flatly pattern that forms of the rectangle (width X: length Y=1:10) of orientation vertically as shown in Figure 8 a, or pattern as shown in Figure 9, wherein being placed as by each rectangle in the outermost skidding shown in Fig. 8 a makes its one end consistent with the edge of flat substrates.In addition, the ratio between the width X and length Y of the rectangle shown in Fig. 8 a and 8b can change into 1:5.5 as shown in figures 10 a and 10b or 1:4 as shown in figures 1 la and 1 lb.By way of parenthesis, in each embodiment shown in Fig. 1 to 3, the structure pattern of the root (upside) of mould cleaning member 2 is equal to the structure pattern shown in Fig. 9.
In addition, although in each above-mentioned embodiment, be unsheltered in gap a and b of sheet mould cleaning foil 1 between adjacent molds cleaning member 2, but the part corresponding with gap a and b of flat substrates 1 can be coated with the film (the film 2a of unvulcanized rubber composition or heat cured resin composition) of the formation material of mould cleaning member 2 as shown in Figure 12 a to 12e (sectional view corresponding with Fig. 4 a to 4e) and Figure 13 a to 13c (sectional view corresponding with Fig. 5 a to 5c).In these cases, film 2a and flat substrates 1 are adjusted to have identical thickness be suitable.By this adjustment, even if when film 2a is formed between mould cleaning member 2 placed side by side with the state of giving prominence to from the surface of base material 1, film 2a also can not have adverse effect for the contraction of mould cleaning foil, and can not cause the wrinkling and warpage in mould cleaning foil.
Embodiment
Next, illustrate hereinafter according to examples and comparative examples of the present invention.But the present invention should not be construed as limited to these embodiments.
< pieces of cloth >
The spunbonded non-woven fabrics (EltasE01070 manufactured by AsahiKasei company) that preparation is made up of long polyester fiber is for flat substrates.This supatex fabric has the tearing strength of 8.5N, the thickness of 0.35mm and 70g/m
2basic weight.
< mould cleaning material >
By in mixer by the titanium oxide of the Cab-O-sil of the EP rubbers of 100 weight portions, 50 weight portions, 5 weight portions, the organic peroxide [normal-butyl-4 of 2 weight portions, 4-bis-(tert-butyl hydroperoxide) valerate], the montan wax of the imidazoles [2,4-diaminourea-6-(2 '-methylimidazolyl-(1 ')) ethyl-s-triazine] of 10 weight portions and 5 weight portions stirs and prepares mould cleaning material.
< embodiment 1 to 5 and comparative example 1 to 6>
On the both sides of flat substrates 1, the mould cleaning material prepared in the above described manner is formed as be configured to row and column regularly by each piece and between adjacent block the pattern of leaving gap, make mould cleaning foil (see Fig. 2) thus.Each block is formed as the shape had shown in Fig. 1.And shown in the size of each block and gap table 1 below and table 2.
The shrinkage factor > of < mould cleaning foil
Respectively, make mould cleaning foil in embodiment 1 to 5 and comparative example 1 to 6 before and after, the dimensional measurement of flat substrates is carried out along the direction corresponding with the longitudinal direction of mould cleaning member, and according to thus obtained measured value, calculate the shrinkage factor of the flat substrates in those mould cleaning foils.Based on these result of calculation, the mould cleaning foil had lower than the shrinkage factor of 1% is chosen as " A ", the mould cleaning foil of the shrinkage factor with 1% to 3% is chosen as " B ", and the mould cleaning foil of the shrinkage factor had more than 3% is chosen as " C ".Shown in thus obtained evaluation result table 1 below and table 2.By way of parenthesis, be difficult to make mould cleaning foil in comparative example 2 and 4, therefore do not provide it and evaluate.
[filling capacity]
Be used in each the mould cleaning foil execution mould made in embodiment 1 to 5 and comparative example 1 to 6 to clean.Want cleaned mould to be the mould for transfer modling used in the process of semiconductor element sealed with resin, and comprise upper and lower.Each in the die surface (apparent surface) of upper and lower is the shape of the rectangle of 24mm × 91mm.And the shape of each cavity under clamped state is the almost cuboid shape of each opening of cavity (be oval), and its size is 5mm × 5mm × 2mm (highly) (banner of each opening of cavity is 5mm).In addition, forming number of cavities is in a mold 16, and these cavity configuration become two row arranged side by side, and wherein every a line comprises 8 cavitys.Gap between this two row is 10mm, and the gap between adjacent cavities in every a line is 1mm.For clean conditions, the clamping gap of mould is set as 0.5mm, molding temperature is set as 175 DEG C, and moulding time is set as 5 minutes.By the situation after clean under these settings of Visual Observations Observations inspection.Based on obtained observed result, to allow the mould cleaning foil that carries out cleaning in each bight of each cavity to be considered to be outstanding in filling capacity and be cited as " A ", and the mould cleaning foil leaving non-cleaning part in the bight of cavity is considered to be inferior in filling capacity and be cited as " B ".Shown in the evaluation result of such acquisition table 1 below and table 2.By way of parenthesis, in comparative example 2 and 4, be difficult to mfg. moulding die cleaning foil, and therefore do not provide evaluation.
Table 1
Table 2
As can be seen from the result shown in table 1 and 2, the mould cleaning foil manufactured in embodiment 1 to 5 is better than the mould cleaning foil manufactured in comparative example 1 to 6 in filling capacity and clean-up performance.
Although describe the present invention in detail with reference to the specific embodiment of the present invention, it will be apparent to those skilled in the art that when not deviating from the spirit and scope of the present invention, various changes and modifications can be carried out wherein.
By way of parenthesis, the application is based on the Japanese patent application JP2011-254241 proposed on November 21st, 2011, and the full content of this application is incorporated by reference the application.
The full content of all bibliography quoted here is incorporated by reference the application.
Mould cleaning foil according to the present invention can be used in the clean of the die surface of mould.
Claims (5)
1. a mould cleaning foil, has the mould of cavity for cleaner, described cavity has the opening of the shape of ellipse or quadrangle,
Wherein said mould cleaning foil comprises:
Flat substrates; With
Multiple belt mould cleaning member, described multiple belt mould cleaning member is formed at least side of flat substrates, formed by unvulcanized rubber composition or heat cured resin composition, and be configured to the pattern aimed at abreast with the gap on described base material by described multiple belt mould cleaning member
Each mould cleaning member is cut into multiple pieces with predetermined space on the longitudinal direction of mould cleaning member, to form the row comprising described multiple pieces,
Each block has the length from 3mm to 50mm,
Gap between block adjacent in the described row comprising described multiple pieces is 0.1mm or larger, and is not more than the width of described mould cleaning member,
Gap on the width of described mould cleaning member between adjacent molds cleaning member is not less than 1/2 of the width of described mould cleaning member, and is not more than the width of described mould cleaning member, and
The width of described mould cleaning member is 1mm or larger, and is not more than 4/5 of the banner of the opening of described cavity.
2. mould cleaning foil according to claim 1, wherein said flat substrates is cloth.
3. mould cleaning foil according to claim 2, wherein said cloth comprises long stapled fabric or supatex fabric.
4. mould cleaning foil according to claim 3, wherein said supatex fabric is spunbonded non-woven fabrics.
5. the mould cleaning foil according to any one in Claims 1-4, wherein said flat substrates stands embossed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-254241 | 2011-11-21 | ||
| JP2011254241A JP5741398B2 (en) | 2011-11-21 | 2011-11-21 | Mold cleaning sheet |
| CN201210342468.XA CN103128884B (en) | 2011-11-21 | 2012-09-14 | Mould cleaning foil |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210342468.XA Division CN103128884B (en) | 2011-11-21 | 2012-09-14 | Mould cleaning foil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105538556A true CN105538556A (en) | 2016-05-04 |
Family
ID=48489653
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510971755.0A Pending CN105538556A (en) | 2011-11-21 | 2012-09-14 | Mold cleaning sheet |
| CN201210342468.XA Active CN103128884B (en) | 2011-11-21 | 2012-09-14 | Mould cleaning foil |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210342468.XA Active CN103128884B (en) | 2011-11-21 | 2012-09-14 | Mould cleaning foil |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP5741398B2 (en) |
| KR (1) | KR102002175B1 (en) |
| CN (2) | CN105538556A (en) |
| MY (1) | MY167740A (en) |
| SG (1) | SG190510A1 (en) |
| TW (1) | TWI516353B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5741398B2 (en) * | 2011-11-21 | 2015-07-01 | 日立化成株式会社 | Mold cleaning sheet |
| CN104194645B (en) * | 2014-08-07 | 2016-05-11 | 湖北迪曼特科技有限公司 | For removing clear mould cake and the preparation and application thereof of the residual aluminium of mould to be repaired |
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| JPH07304044A (en) * | 1994-05-11 | 1995-11-21 | Toshiba Chem Corp | Method and material for cleaning mold |
| CN101007432A (en) * | 2006-01-27 | 2007-08-01 | 日东电工株式会社 | Sheet for regenerating a mold |
| CN101077995A (en) * | 2006-05-25 | 2007-11-28 | 日东电工株式会社 | Mold cleaning composition |
| JP2008143144A (en) * | 2006-12-13 | 2008-06-26 | Nitto Denko Corp | Sheet for mold reproduction |
| CN103128884A (en) * | 2011-11-21 | 2013-06-05 | 日东电工株式会社 | Mold cleaning sheet |
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| EP0271107B1 (en) * | 1986-12-11 | 1993-06-02 | Nitto Denko Corporation | Mold cleaning composition, sheet for cleaning mold, and method for cleaning mold using said cleaning sheet |
| JP3943145B2 (en) * | 1994-11-04 | 2007-07-11 | 株式会社ルネサステクノロジ | Mold cleaning method and semiconductor chip resin sealing method |
| JP2862852B2 (en) * | 1997-04-21 | 1999-03-03 | 日東電工株式会社 | Mold regeneration sheet and mold cleaning method using the same |
| AU2003289119A1 (en) * | 2002-12-06 | 2004-06-30 | Nippon Carbide Kogyo Kabushiki Kaisha | Cleaning material for molding metal die, and cleaning method |
| JP3780284B2 (en) * | 2004-01-16 | 2006-05-31 | 株式会社ルネサステクノロジ | Mold cleaning sheet |
| JP4373291B2 (en) * | 2004-06-24 | 2009-11-25 | 株式会社ルネサステクノロジ | Manufacturing method of semiconductor device |
| JP5245040B2 (en) * | 2006-01-27 | 2013-07-24 | 日立化成株式会社 | Mold regeneration sheet |
| TWI414410B (en) * | 2006-01-27 | 2013-11-11 | Nitto Denko Corp | Sheet for regenerating a mold |
| JP2007242924A (en) * | 2006-03-09 | 2007-09-20 | Renesas Technology Corp | Manufacturing method of semiconductor device |
| JP5089273B2 (en) * | 2006-10-23 | 2012-12-05 | 日東電工株式会社 | Mold regeneration sheet |
| JP2008213313A (en) * | 2007-03-05 | 2008-09-18 | Nitto Denko Corp | Sheet for regeneration of mold and mold cleaning method using the sheet |
-
2011
- 2011-11-21 JP JP2011254241A patent/JP5741398B2/en active Active
-
2012
- 2012-09-14 SG SG2012068771A patent/SG190510A1/en unknown
- 2012-09-14 CN CN201510971755.0A patent/CN105538556A/en active Pending
- 2012-09-14 MY MYPI2012700662A patent/MY167740A/en unknown
- 2012-09-14 TW TW101133862A patent/TWI516353B/en active
- 2012-09-14 KR KR1020120101875A patent/KR102002175B1/en active IP Right Grant
- 2012-09-14 CN CN201210342468.XA patent/CN103128884B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07304044A (en) * | 1994-05-11 | 1995-11-21 | Toshiba Chem Corp | Method and material for cleaning mold |
| CN101007432A (en) * | 2006-01-27 | 2007-08-01 | 日东电工株式会社 | Sheet for regenerating a mold |
| CN101077995A (en) * | 2006-05-25 | 2007-11-28 | 日东电工株式会社 | Mold cleaning composition |
| JP2008143144A (en) * | 2006-12-13 | 2008-06-26 | Nitto Denko Corp | Sheet for mold reproduction |
| CN103128884A (en) * | 2011-11-21 | 2013-06-05 | 日东电工株式会社 | Mold cleaning sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| MY167740A (en) | 2018-09-24 |
| CN103128884A (en) | 2013-06-05 |
| CN103128884B (en) | 2016-01-27 |
| JP5741398B2 (en) | 2015-07-01 |
| SG190510A1 (en) | 2013-06-28 |
| TWI516353B (en) | 2016-01-11 |
| TW201321160A (en) | 2013-06-01 |
| KR102002175B1 (en) | 2019-07-19 |
| KR20130056162A (en) | 2013-05-29 |
| JP2013107287A (en) | 2013-06-06 |
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Application publication date: 20160504 |