CN112976598B - Preparation method of dense-hole mold cup and dense-hole mold cup - Google Patents
Preparation method of dense-hole mold cup and dense-hole mold cup Download PDFInfo
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- CN112976598B CN112976598B CN201911215871.4A CN201911215871A CN112976598B CN 112976598 B CN112976598 B CN 112976598B CN 201911215871 A CN201911215871 A CN 201911215871A CN 112976598 B CN112976598 B CN 112976598B
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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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
- B29C67/202—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising elimination of a solid or a liquid ingredient
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/48—Wearing apparel
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a preparation method of a dense-hole mold cup, which comprises the following steps: 1) designing a mold: the die sequentially comprises an upper die, a middle die and a lower die, wherein at least the middle die is coated with polytetrafluoroethylene; 2) punching: placing the sponge between the upper die and the middle die, closing the dies and punching to obtain the dense-hole sponge; 3) compounding: compounding at least one surface of the dense-hole sponge with a fabric to obtain a composite material; 4) die pressing: cutting the composite material obtained in the step 3) into cut pieces, and then carrying out die pressing to obtain a forming die cup; 5) trimming: cooling and trimming the formed mold cup obtained in the step 4) to obtain the dense-hole mold cup. The invention has the advantages that: according to the preparation method of the close-hole mold cup, polytetrafluoroethylene is coated on the punching area of the punching mold, so that the problem of punching adhesion is solved, close-hole sponge with the aperture of 1.2mm and the pitch of 4mm can be prepared, and the close-hole mold cup is prepared by combining a mold pressing process and has good air permeability, moisture absorption and sweat releasing functions.
Description
Technical Field
The invention relates to the technical field of clothing production, in particular to a preparation method of a dense-hole mold cup and the dense-hole mold cup prepared by the preparation method.
Background
The sponge cup is widely applied to the market, but the existing sponge cup has the problems of poor permeability, stuffiness and impermeability after being worn, and poor moisture absorption and sweat releasing effects.
To achieve the goal of making the sponge cup more breathable, either blasting cotton or perforated cotton is used. However, the currently available blasting cotton in the market is not preferred because it is easy to cause fire, and the cotton after blasting also has peculiar smell (mainly remains chemical substances during blasting and has peculiar smell). Secondly, the perforated cotton is adopted, the perforation distance of the perforated cotton used in the current market is basically different from 10 mm to 15mm, the aperture is 1.2 mm to 3mm, and the like, although the cotton can achieve the ventilation effect, the ventilation effect is not ideal and is not the best state due to too large perforation distance.
The more dense the hole on the cotton punches, ventilative effect is better, but can't use the little mould of pitch to punch at present and obtain the little dense hole of pitch cotton because the distance between hole and the hole is more close the friction production heat when punching in succession big and can't in time scatter, leads to mould and sponge adhesion, from unable continuity of operation. So that the sponge mold cup with small hole pitch cannot be produced at present.
Disclosure of Invention
In view of the above, in order to overcome the defects of the prior art, the invention aims to provide an improved preparation method of a sponge mold cup, which can prepare a dense-hole mold cup with a hole pitch of 4 mm.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a dense-hole mold cup comprises the following steps:
1) designing a mold: the die sequentially comprises an upper die, a middle die and a lower die, wherein at least the middle die is coated with polytetrafluoroethylene;
2) punching: placing the sponge between the upper die and the middle die, closing the dies and punching to obtain the dense-hole sponge;
3) compounding: compounding at least one surface of the dense-pore sponge obtained in the step 2) with a fabric to obtain a composite material;
4) die pressing: cutting the composite material obtained in the step 3) into cut pieces, and then carrying out die pressing to obtain a forming die cup;
5) trimming: cooling and trimming the formed mold cup obtained in the step 4) to obtain the dense-hole mold cup.
According to some preferred implementation aspects of the present invention, the upper die includes a hole plate, the hole plate is provided with a plurality of punching holes, the middle die is provided with punching pins corresponding to the punching holes, the lower die is provided with ejector pins corresponding to the punching pins, the middle die is fixed on the operation platform, and the lower die is connected to the operation platform through an elastic member. Through the position coating polytetrafluoroethylene that punches a hole in the mould part to special cut-out press is cooperated, make when punching a hole to the sponge, can reduce the distance between the adjacent hole and also can not cause bad influence.
Preferably, in the step 2), during punching, the middle die is fixed, the upper die moves downwards, the punch pin is accommodated in the punch hole of the hole plate, the lower die moves upwards, and the ejector pin penetrates through the punch pin.
According to some preferred embodiments of the invention, the polytetrafluoroethylene coating material is uniformly distributed in the solvent, and the thickness of the polytetrafluoroethylene on the intermediate die is 0.15-0.25mm, preferably 0.2 mm.
According to some preferred implementation aspects of the invention, in the step 2), the punching is performed by arranging paperboards on the upper and lower surfaces of the sponge, and clamping the sponge between the paperboards. The thickness of the cardboard is 2 mm. Through setting up the cardboard, can prevent when punching a hole to the sponge, lead to the hole edge that punches out uneven, have the damage.
According to some preferred aspects of the invention, the feed rate is maintained at about 2m/min during punching to prevent sticking due to excessive processing.
According to some preferred aspects of the invention, the parameters of the step 4) during the embossing are: the temperature of the upper and lower dies is 185-188 ℃, the time is 140-180s, and the pressure is 6-10kg/cm2. In some embodiments, the time is preferably 160s and the pressure is preferably 8kg/cm 2。
According to some preferred aspects of the invention, the two sides of the dense-pore sponge in the step 3) are attached with the facing materials, and the composite material with the facing materials on the two sides obtained in the step 3) is subjected to the steps of 4) die pressing, cutting and 5) trimming to obtain the dense-pore die cup. That is, in some embodiments, after the two sides of the single-layer dense-hole sponge are combined with the facing material, the dense-hole mold cup with a smaller thickness is obtained by cutting and molding, etc., and only includes the middle single-layer dense-hole sponge and the facing materials on the two sides of the dense-hole sponge.
According to some preferable implementation aspects of the invention, the one side of the dense-hole sponge in the step 3) is attached with a fabric, and in the step 4) of die pressing, the two cut pieces are overlapped up and down and then die pressing is carried out, so that the sponges on the two cut pieces are attached to each other. In other embodiments, one surface of the single-layer dense-hole sponge can be compounded with the fabric, and then two cut pieces are superposed and subjected to die pressing to obtain the dense-hole die cup with a thicker thickness. And when the die pressing is carried out, the two layers of close pore sponges are mutually attached, and quick-drying glue is sprayed between the two layers of close pore sponges.
In other embodiments, the thickness of the final mold cup can be increased by placing a sponge core between the two layers of dense-pore sponges during molding, and in order to increase the air permeability of the mold cup, the sponge core is provided with holes penetrating through the thickness of the sponge core, and the size of the holes is 1.8-10mm, which is larger than the holes in the dense-pore sponges.
The invention also provides the dense-hole mold cup prepared by the preparation method, wherein the hole pitch can reach 4 mm.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the advantages that: according to the preparation method of the close-hole mold cup, polytetrafluoroethylene is coated on the punching area of the punching mold, so that the problem of punching adhesion is solved, close-hole sponge with the aperture of 1.2mm and the pitch of 4mm can be prepared, and the close-hole mold cup is prepared by combining a mold pressing process and has good air permeability, moisture absorption and sweat releasing functions.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a dense hole die cup during punching in a preferred embodiment of the invention;
FIG. 2 is a schematic view of a preferred embodiment of the present invention during molding of a closed-cell mold cup;
FIG. 3 is a schematic view of a dense-cavity die cup during molding in accordance with another preferred embodiment of the present invention;
Wherein: the plastic material comprises an upper die-1, a pore plate-11, a punching hole-12, a middle die-2, a punching pin-21, a lower die-3, a top pin-31, an elastic part-32, an operation platform-4, a male die-5, a female die-6, a composite material-7, a cut cotton core-8 and a sponge-9.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1 to 3, the preparation method of the dense hole mold cup in the embodiment specifically includes the following steps:
1) designing a mold: the punching die comprises an upper die 1, a middle die 2 and a lower die 3 in sequence, and polytetrafluoroethylene is coated on a punching area of the middle die 2 in the embodiment so as to prevent adhesion during punching.
As shown in fig. 1, a hole plate 11 is disposed at the bottom of an upper die 1, a plurality of punching holes 12 are disposed on the hole plate 11, a punching pin 21 corresponding to the punching hole 12 is disposed on a middle die 2, a knock pin 31 corresponding to the punching pin 21 is disposed on a lower die 3, the middle die 2 is fixed on an operation platform 4, and the lower die 3 is connected with the operation platform 4 through an elastic member 32. The punch pin 21 has a hollow structure, and the ejector pin 31 can pass through the punch pin 21 to eject the punched sponge scrap.
By coating the position of the punching pin 21 of the middle die 2 with polytetrafluoroethylene and matching with a special punching die, the distance between adjacent holes can be reduced without causing adhesion and other adverse effects when the sponge 9 is punched.
The thickness of the teflon on the punch pin 21 is 0.15-0.25mm, preferably 0.2 mm. When coating polytetrafluoroethylene, in order to uniformly distribute a polytetrafluoroethylene coating material in a solvent and then uniformly spray the polytetrafluoroethylene coating material to corresponding positions on a mold, the method comprises the following steps: 1. preparing a workpiece; 2. spraying of wet dispersion coating; 3. drying; 4. and (5) sintering. This is a conventional technical means in the related art.
2) Punching: and placing the sponge between the upper die 1 and the middle die 2, closing the dies and punching to obtain the dense-hole sponge.
During punching, the paperboards are placed on the upper surface and the lower surface of the sponge 9, the sponge 9 is clamped between the paperboards, then punching is conducted, and the thickness of each paperboard is 0.2 mm. Through setting up the cardboard, can prevent to punch a hole to sponge 9 the time, lead to the hole edge that punches out uneven, have the damage. And during punching, the middle die 2 is fixed, the upper die 1 is controlled to move downwards, the punching pin 21 of the middle die 2 is accommodated in the punching hole 12 of the hole plate 11, the lower die 3 moves upwards, and the ejector pin 31 penetrates through the punching pin 21 to eject the sponge scraps. The feeding speed is kept about 2m/min during punching so as to prevent the situation that the blocking occurs due to too fast processing.
3) Compounding: compounding at least one surface of the dense-pore sponge obtained in the step 2) with a fabric to obtain a composite material 7; the purpose of compounding is to completely attach the fabric and the dense-hole sponge, and specifically, hot melt adhesive is adopted for compounding.
The fabric layer in this embodiment is made of a fabric capable of being compression molded, such as a high-density cloth.
4) Die pressing: cutting the composite material 7 obtained in the step 3) into cut pieces, and then carrying out die pressing to obtain a formed die cup.
The molding parameters in this example were: the temperature of the upper die and the lower die 3 is 185-188 ℃, the molding time of the thin cup is 160s, the molding time of the thick cup is 180s, and the pressure is 8kg/cm2。
As shown in fig. 2, when preparing the thin cup, the two sides of the dense-pore sponge are attached with the shell fabric, so as to obtain the composite material 7 with the shell fabric on the two sides, and then the dense-pore mold cup is obtained after mold pressing, cutting and trimming. Namely, after two sides of the single-layer dense-hole sponge are compounded with the fabric, a dense-hole mold cup with a smaller thickness is obtained through cutting mold pressing and the like, and the mold cup only comprises the middle single-layer dense-hole sponge and the fabric on two sides of the dense-hole sponge. Namely, the single composite material 7 when preparing the thin cup is composed of a single layer of dense-pore sponge in the middle and fabrics on two sides of the dense-pore sponge.
When the mold cup with a slightly thick thickness is prepared, the single surface of the dense-hole sponge is attached to the fabric, when in mold pressing, the two cut pieces are overlapped up and down and then are subjected to mold pressing, the sponges on the two cut pieces are attached to each other, and the fabric faces the male mold 5 or the female mold 6. One side of the single-layer dense-hole sponge can be compounded with the fabric, and then the two cut pieces are overlapped and then are subjected to die pressing to obtain the thick dense-hole die cup. And when the die pressing is carried out, the two layers of close-pore sponges are mutually attached, and quick-drying glue is sprayed between the two layers of close-pore sponges.
As shown in FIG. 3, when a thick cup with a larger thickness is prepared, the thickness of the final mold cup can be increased by placing a cut cotton core 8 between the two layers of dense-pore sponges during molding, and in order to increase the air permeability of the mold cup, the cut cotton core 8 is provided with holes which penetrate through the thickness of the cut cotton core 8, and the size of the holes is 1.8-10mm, which is larger than the holes on the dense-pore sponges. Namely, the single composite material 7 in the thick cup preparation process is composed of a single layer of dense-hole sponge and a fabric attached to one side of the dense-hole sponge.
5) Trimming: cooling and trimming the formed mold cup obtained in the step 4) to obtain a transparent, light, soft and washable dense-hole mold cup, wherein the hole diameter is 1.2mm, and the hole pitch is 4 mm.
Because the hole pitch of the dense-hole die cup is small, the number of holes is increased in the effective area, and therefore the purposes of ventilation and weight reduction are achieved.
The cotton in the above embodiments can be used in common with the cotton in the prior art, and will not limit and misinterpret the technical scheme of the present invention. The technical solutions specifically described in the above examples are conventional technical means in the art or selection such as compounding between a fabric and a sponge.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (9)
1. The preparation method of the dense-hole mold cup is characterized by comprising the following steps of:
1) designing a mold: the die sequentially comprises an upper die, a middle die and a lower die, wherein at least the middle die is coated with polytetrafluoroethylene;
2) punching: placing the sponge between the upper die and the middle die, closing the dies and punching to obtain the dense-hole sponge;
3) compounding: compounding at least one surface of the dense-pore sponge obtained in the step 2) with a fabric to obtain a composite material;
4) Die pressing: cutting the composite material obtained in the step 3) into cut pieces, and then carrying out die pressing to obtain a forming die cup;
5) trimming: cooling and trimming the formed mold cup obtained in the step 4) to obtain a dense-hole mold cup;
the punching die comprises a hole plate, a middle die, a lower die and an elastic piece, wherein the hole plate is provided with a plurality of punching holes, the middle die is provided with punching pins corresponding to the punching holes, the lower die is provided with ejector pins corresponding to the punching pins, the middle die is fixed on an operation platform, and the lower die is connected with the operation platform through the elastic piece.
2. The method for preparing a dense-hole die cup according to claim 1, wherein in the step 2), the middle die is fixed, the upper die moves downwards, the punch pin is accommodated in the punched hole of the orifice plate, the lower die moves upwards, and the ejector pin penetrates through the punch pin.
3. The method of claim 1, wherein the polytetrafluoroethylene on the middle mold has a thickness of 0.15-0.25 mm.
4. The method for preparing a close-hole die cup according to claim 1, wherein the sponge has paperboards on the upper and lower surfaces during punching in step 2), and the sponge is sandwiched between the paperboards for punching.
5. The method of claim 1, wherein the feed rate at the time of punching is not greater than 2 m/min.
6. The method for preparing a close-bore mold cup according to claim 1, wherein the parameters during the molding in step 4) are: the temperature of the upper and lower dies is 185-188 ℃, the time is 140-180s, and the pressure is 6-10kg/cm2。
7. The method for preparing the close-pore mold cup according to claim 1, wherein the two sides of the close-pore sponge in the step 3) are attached with the shell fabric, and the composite material with the shell fabric on the two sides obtained in the step 3) is subjected to the step 4) of die pressing, cutting and the step 5) of trimming to obtain the close-pore mold cup.
8. The method for preparing the dense-hole mold cup according to claim 1, wherein the dense-hole sponge in the step 3) is adhered with a fabric on one side, and in the step 4), the two cut pieces are overlapped up and down and then subjected to mold pressing, so that the sponges on the two cut pieces are adhered with each other.
9. A close-celled mould cup produced by the process according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911215871.4A CN112976598B (en) | 2019-12-02 | 2019-12-02 | Preparation method of dense-hole mold cup and dense-hole mold cup |
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| CN201911215871.4A CN112976598B (en) | 2019-12-02 | 2019-12-02 | Preparation method of dense-hole mold cup and dense-hole mold cup |
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| CN112976598A CN112976598A (en) | 2021-06-18 |
| CN112976598B true CN112976598B (en) | 2022-06-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4886632A (en) * | 1985-09-09 | 1989-12-12 | Kimberly-Clark Corporation | Method of perforating a nonwoven web and use of the web as a cover for a feminine pad |
| CN103522357B (en) * | 2013-10-29 | 2015-09-09 | 苏州美山子制衣有限公司 | Mould cup punch press |
| CN206062180U (en) * | 2016-09-07 | 2017-04-05 | 东莞市魔丽身段服装有限公司 | A kind of Poromeric bra |
| CN209643893U (en) * | 2019-01-09 | 2019-11-19 | 广东恩浩内衣实业有限公司 | A kind of mold cup punching die |
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