JP4108319B2 - Locking member for mold-in and method for producing resin molded body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking member for mold-in molding embedded in the surface of a molded body when a cushion such as an automobile seat or an office chair or other resin molded body is molded. This cushion with a locking member is used for a seat or the like by covering the surface with a covering such as a fiber cloth and fixing the covering to the cushion with the locking member.
[0002]
[Prior art]
Recently, as a method of molding an automobile seat, a locking member having a large number of engaging elements on the front surface and a large number of embedded elements on the back surface, that is, a hook-and-loop fastener tape, is set at a predetermined position in the mold, and the molding is performed. A molding resin is injected into a mold and foamed, and the embedded element of the tape is embedded and integrated in the cushion surface, and embedded and molded so that the engaging element is exposed on the outer surface of the cushion (so-called mold-in molding). Law) has been proposed. The back surface of the covering (seat cover) is provided with an engaged element that can be engaged with the engaging element of the surface fastener tape, and by engaging both these elements, the seat cover is provided. The cushion is covered with a seat cover.
[0003]
By the way, in the above-described mold-in molding method, when the locking member is mounted in a recess provided in a molding die and molded, a foamable molding resin (hereinafter sometimes referred to as resin) is used as a locking member substrate. It is necessary to prevent the element from flowing into the engagement element side from the gap of the mold recess and filling the element. Since the locking member is usually in the shape of a long rectangle or tape, the inflow of the molding resin is caused by the gap between the widthwise end of the locking member and the molding die recess, and the length of the locking member. Since the resin that flows in and fills the engaging element accommodated in the recessed portion with the resin, the engaging element to be exposed on the surface of the obtained resin molded body is the resin. The problem arises that it is not covered and exposed.
[0004]
An example of the prior art that solves the above problem is shown in FIG. The locking member A includes a hook-and-loop fastener tape E having a large number of engaging elements C and embedded elements D on both the front and back surfaces of the substrate B of the hook-and-loop fastener, and an upper surface of the engaging element C. The steel piece F magnetically attached to the magnet body embedded in the mold and the steel piece F and the engaging element C are entirely covered, and the molding resin composition flows into the engaging element C side during mold-in molding. It consists of a cover film G to block. The outer peripheral edge of the film G is joined and integrated with the peripheral edge of the hook-and-loop fastener tape E by an adhesive or heat seal means.
[0005]
And the said locking member A fixes the said steel piece F to the recessed part K of the shaping | molding die by which the magnet J is installed in the bottom face using the magnetic adhesion force. Thereafter, the foamable resin composition is injected into the mold, and a molded body such as a cushion in which the embedded element D is embedded in the resin is molded. The cushion is taken out of the mold, and then the cover film G and the steel piece. F is removed, and the engaging element C of the hook-and-loop fastener is exposed on the surface of the cushion. In this locking member, since the engaging element is completely covered with the film, there is a gap between the concave portion of the mold and the locking member, and the resin fills the engaging element even when the molding resin flows in. However, since the molding resin adheres to the outer surface of the cover film, when the cover film is removed, the resin that flows in can be removed together with the cover film.
[0006]
However, in the case of the above-described mold-in forming means, it is necessary to remove the steel piece F and the cover film G after forming the cushion, but these members need to be disposed as waste. In addition, if film scraps remain on the surface of the engagement element when the film G is removed, the engagement element is prevented from being exposed and the engagement force is lowered, and the appearance is deteriorated. Necessary. In addition, it takes time and effort, and there is a risk of finger injury when the steel piece F is removed.
[0007]
The invention disclosed in Japanese Patent Laid-Open No. 7-148007 is a locking member for mold-in, which has an engaging element on the surface of the substrate, rises in the length direction on the back surface of the substrate, and is on the width side of the substrate The locking member for mold-in molding which has the fitting element which protrudes outside from an edge part and seals the gap | interval of the width direction of a locking member is shown. Further, in this prior document, an engagement element located at the end of the locking member in the lengthwise direction is engaged with a sealing member such as a hook-and-loop fastener piece, a nonwoven fabric or a pile, and the molding resin is molded by the sealing member. It is disclosed that the inflow into the recess of the mold is prevented.
[0008]
In this technique, since the locking member is fitted and fitted into the recess of the mold, care must be taken in the operation of mounting the locking member in the recess. If the mounting is insufficient, the gap can be sealed. Therefore, the inflow of resin into the locking member could not be prevented. Further, the sealing member in the length direction of the locking member is a member that blocks the gap between the concave portion and the locking member with a nonwoven fabric or the like, and could not sufficiently prevent the inflow of resin.
[0009]
In view of the situation in which prevention of inflow of molding resin from the end portion in the length direction of the locking member is regarded as important, the present invention is effective in inflow of resin from the end portion in the length direction of the locking member. It is an object of the present invention to provide a locking member for mold-in molding that can be prevented and a method for manufacturing a resin molded body using the locking member.
[0010]
[Means for Solving the Problems]
That is, the present invention is an oblong locking member for mold-in, and has a large number of engaging elements on the surface of the substrate, and a ferrite-containing layer is provided in an area where the engaging elements stand. A mold-in having a flat portion where no engaging element exists on the engaging element surface side of the end portion in the length direction of the substrate, and further having a protruding portion having a length of 0 to 15 mm outside the flat portion. This is a locking member for use.
[0011]
Furthermore, the present invention has a large number of engaging elements on the surface of a long rectangular substrate, and a ferrite-containing layer is provided in an area where the engaging elements stand, and at the end of the substrate in the longitudinal direction. A locking member for mold-in having a flat end portion having no engaging element on the engaging element surface side and a protruding portion having a length of 0 to 15 mm on the outside thereof is provided on the mold and a magnet is provided on the bottom surface thereof. A magnet provided on the bottom surface of the recess, and mounted so that the engaging element fits in the recess, and the flat portion in the length direction of the locking member is disposed on the shoulder of the longitudinal end of the recess. Resin molded body with a locking member comprising sealing the end in the length direction of the locking member by a suction force of ferrite provided on the locking member, and then introducing a molding resin into the mold and curing it. It is a manufacturing method.
[0012]
Furthermore, the present invention has a number of engaging elements on the surface of a long rectangular substrate, and a ferrite-containing layer is provided in an area where the engaging elements are erected, and at the end of the longitudinal direction of the substrate. The mold is provided with a locking member for mold-in having a flat portion having no engaging element and a protruding portion containing ferrite on the outside of the mating element surface side. On the bottom surface inside and outside the shoulder at the end in the length direction of the recess The engagement element is fitted in the recess provided with a magnet, and The flat portion on the shoulder And place The shoulder Projecting the protruding portion of the locking member to the outside of A magnet provided on the inner bottom and the outer bottom of the shoulder; , Ferrite-containing layer provided in the area where the engaging element is erected and ferrite provided in the protrusion This is a method for producing a resin molded body with a locking member, in which the end portion in the length direction of the locking member is sealed, and then a molding resin is introduced into the mold and cured.
[0013]
Examples of the resin constituting the locking member in the present invention include thermoplastic resins such as polyolefin resins, polyester resins, and polyamide resins. Among these, polyolefin resins such as polypropylene are preferable from the viewpoint of moldability. In order to give flexibility to the locking member of the present invention, it is desirable to select one having excellent flexibility among the above resins, for example, polypropylene.
[0014]
The locking member used in the present invention has a long rectangular shape, that is, a tape shape, and a large number of engaging elements are arranged on the surface of the substrate by integral molding. The engagement element can be mushroom-shaped, arrow-shaped or hook-shaped. The width and length of the locking member are not particularly limited, but usually the width is about 5 to 50 mm, more preferably about 10 to 30 mm, and the length is about 10 to 100 cm, more preferably about 15 to 70 cm. The thickness of the substrate is usually preferably from 0.2 to 1.0 mm, more preferably from 0.3 to 0.7 mm. The height of the engagement element is not particularly limited, but is usually preferably in the range of about 1 to 10 mm, more preferably in the range of about 1.5 to 6 mm. One or more engaging elements are provided depending on the width of the substrate. The density of the engaging elements to be present on the substrate is 30 to 100 / cm ² Is preferred. In addition, an element serving as an anchor, that is, an embedded element may be provided on the back side of the substrate as necessary in order to increase the peel strength from the molding resin. The embedded element is preferably a continuous row body having a swollen head.
[0015]
The locking member of the present invention melts and extrudes the above-described thermoplastic resin from a nozzle provided with a predetermined slit, forms a tape having a continuous line on the surface of the substrate, and is small in a continuous line formed on the surface. A locking member having a number of independent engaging elements on the surface is obtained by making a cut at intervals and then stretching the tape lengthwise.
[0016]
A known structure can be used for sealing the gap in the width direction of the locking member of the present invention. Specific examples thereof include a protrusion provided continuously at the end in the width direction of the substrate, a fitting element for sealing protruding outward on the back surface of the substrate described in JP-A-7-148007, or An end portion for sealing in which a recess is provided in the vicinity of the end portion in the width direction of the substrate to make the end portion of the substrate, that is, the ear portion flexible with respect to the substrate. In the present invention, it is particularly preferable that the end in the width direction is a flexible sealing end, and the flexible sealing end is placed on the shoulder of a recess provided in the mold. This is a structure for sealing the gap. The structure is such that a ferrite-containing layer is provided on the locking member, a magnet is embedded in the bottom of the concave portion of the mold, the locking member is brought close to the concave portion of the mold, and the locking member is attracted to the concave portion by magnetic force. The mounting of the locking member to the molding die recess is facilitated, and at the same time, the locking member is sealed in the width direction, so that the efficiency of the mounting work can be improved.
[0017]
Hereinafter, the present invention will be described with reference to the drawings.
FIG. 1 is a partial plan view showing an end structure in the length direction of an example of a locking member according to the present invention. 2 is a partial cross-sectional view taken along line XX of FIG. 1 showing a state in which the locking member of FIG. 1 is installed in the recess of the mold.
A number of engaging elements 2 are erected on the surface of the substrate 1 of the locking member, and a flat portion 3 having no engaging elements is provided at the end in the length direction. A ferrite-containing layer 4 (hatch portion) is applied to a region where the engaging element is erected by a known method such as a needle coating method. As shown in FIG. 2, the flat portion 3 is arranged so as not to leave a gap in the shoulder 6 at the end in the length direction of the molding die recess 5, so that a smooth surface as much as possible, that is, the resin liquid enters. It is formed on a surface having such a smoothness that no gap is formed.
[0018]
As will be described later, the flat portion is a portion disposed on the shoulder 6 at the end in the length direction of the concave portion provided in the mold, and the flat portion is more than half of the thickness of the shoulder, preferably It is desirable to be placed over two-thirds, more preferably almost the full width of the shoulder.
The flat portion preferably has a margin of 1 to 2 mm inside the shoulder. Since the shoulder portion 6 is usually about 3 to 6 mm, the flat portion 3 is preferably about 4 to 8 mm. The length of the flat portion does not need to be strictly defined, and a flat portion arranged with a margin in the shoulder portion can be a flat end portion in the present invention.
[0019]
The flat portion can be usually formed by melting and flattening the engaging element by an ultrasonic heating press or a high-frequency heating press. The flat portion formed by melting the engaging element region having the ferrite layer exists in a state where the ferrite layer is exposed on a part of the surface or the ferrite layer is coated with a resin. Since the ferrite present in the flat portion is attracted by the magnet, it is effective for sealing the shoulder portion. A new ferrite layer may be applied flat on the flat portion.
[0020]
In the combination shown in FIG. 2 in which the shoulder portion 6 of the recess is made of a magnet and the locking member having the flat portion 3 containing ferrite is arranged on the shoulder portion, the shoulder portion and the flat portion are directly magnetized, and the two are in close contact with each other. Therefore, it is particularly preferable from the viewpoint of sealing.
[0021]
FIG. 3 is a partial plan view showing an end structure of another example of the locking member according to the present invention. 4 is a partial cross-sectional view taken along line YY of FIG. 3 showing a state in which the locking member of FIG. 3 is installed in the recess of the mold.
3 and 4, the outer portion of the flat portion 3, that is, the outer portion that protrudes from the end of the shoulder portion 6 is the protruding portion 7. The protrusion has a length of 1 to 15 mm from the end of the shoulder, and more preferably has a length of 2 to 10 mm. Projections longer than 15 mm are inferior in workability and there is a risk of reducing the sealing of the shoulder.
[0022]
The protrusion 7 can be any one of a flat surface, a flat surface containing ferrite, a surface having an engagement element, and a surface having an engagement element and ferrite. When the protrusion is a flat surface or a surface having an engagement element, the protrusion is embedded in the molding resin to enhance the anchor effect. When the projecting portion 7 is a flat surface containing ferrite or a surface having an engaging element and ferrite, the shoulder is sealed by an attractive force between the ferrite and the magnet 9 provided outside the recess in addition to the anchor effect. Will be strengthened.
[0023]
In FIG. 3, the protruding portion 7 has an engaging element 2 and a ferrite layer 4. When the locking member shown in FIG. 3 is attached to the recess shown in FIG. 4, that is, the recess provided with magnets 8 and 9 on the inner and outer bottom surfaces with respect to the shoulder 6, the ferrite on the center side of the locking member is located inside the recess. The magnet 8 is attracted, and the ferrite in the protrusion 7 is attracted to the magnet 9 outside the recess. Thus, since the suction force acts in both directions of the flat portion 3 of the locking member around the shoulder portion 6 (from left to right in FIG. 4), the sealing of the shoulder portion 6 with the flat portion of the locking member is strengthened. be able to. The engaging element of the protrusion 7 is used as an embedded element for resin, and a fiber porous body or a resin porous body is engaged with the engaging element, and the resin is infiltrated into the porous body to form an embedded element. be able to.
[0024]
Further, when the protruding portion is melted and flattened in the same manner as the flat portion, a protruding portion containing ferrite on the surface is obtained in the same shape as the flat portion. When the locking member having such a flat protruding portion is attached to the shoulder portion made of a magnet, there is an effect that the shoulder portion is well sealed and easy to attach.
[0025]
The recess is usually formed of a metal such as stainless steel, but if the shoulder 6 at the end in the length direction is formed of a magnet, the magnet at the shoulder attracts the ferrite of the locking member to enhance the sealing effect. be able to. Therefore, a mode in which the locking member having the flat portion 3 containing ferrite is used by being mounted on the shoulder portion 6 of the recess formed of a magnet is a preferable mode. In addition, a protrusion part can be added to a flat part as needed. It is not practical to form a long shoulder portion in the width direction of the concave portion with a magnet because it is difficult to manufacture and the cost increases.
[0026]
The locking member shown in FIG. 1 has ears 10 and concave strips 11 that make the ears flexible with respect to the substrate at both ends in the width direction. Intrusion of the molding resin liquid from the part can be prevented, which is preferable. The depth of the recess 11 is preferably 80 to 20% of the thickness of the substrate. The concave shape may be provided on the engaging element side surface of the locking member, on the back surface side thereof, or on both surfaces. If the groove becomes too deep, the groove will crack and the seal may be broken.
[0027]
The locking member shown in FIG. 1 is mounted in a slightly rectangular recess corresponding to the shape of the locking member so that the engaging element is fitted into the recess. The concave portion has a shoulder portion around it and a magnet on the bottom surface, and the engaging element is in close contact with the shoulder portion in the width direction of the concave portion, and the lengthwise end of the locking member. The flat part of the part and the shoulder part of the end part in the longitudinal direction of the concave part are brought into close contact with each other, and the seal between the locking member and the concave part is achieved over the entire circumference. The locking member in FIG. 1 is arranged so that the concave stripe is located inside the shoulder in the width direction of the concave provided in the mold, and the substrate is attracted to the bottom of the concave by the attractive force of the ferrite and the magnet. In doing so, the recess of the locking member exhibits flexibility, and the ear portion is in close contact with the shoulder in the width direction of the recess. When there is no recess of the locking member, it is difficult to obtain close contact with the shoulder because the ear is not flexible. Instead of the concave stripe, it is also possible to make the ear portion flexible with respect to the substrate by reducing the thickness of the ear portion. The structure of the locking member in the width direction is not limited to the above-mentioned ear part, and various known structures can be used, and the engaging member can be attached to a recess having a structure suitable for the structure.
[0028]
The ferrite-containing layer is provided by applying a liquid mixture obtained by mixing commercially available ferrite particles to an adhesive, for example, a rubber adhesive, on the surface of the locking member. A needle coating method in which the liquid mixture is supplied between the rows of the engaging elements from the discharge port of the needle is preferable so that the engaging elements are not buried in the coating layer.
[0029]
FIG. 5 is a partial plan view showing another example of the end portion of the locking member according to the present invention. The porous body 12 is engaged with the protruding portion 7 of the locking member by an engaging element present in the protruding portion. The porous body 12 may be anything that engages with the engagement element 2, and includes a fiber assembly (cotton-like lump), a nonwoven fabric, a pile knitted fabric, a loop member of a hook-and-loop fastener, a porous resin molded body, and a resin. Foams and laminates thereof are used, and it is preferable to have ferrite-containing layer 4 on the surface thereof, that is, the surface in contact with the mold surface. The porous body is preferably approximately the same size as the protruding portion, slightly smaller than the width of the locking member, and slightly from the lengthwise end of the locking member, for example, about 5 to 15 mm, more preferably about 5 to 10 mm. Protruding so is preferable in terms of sealing and workability. The porous body is one in which the molding resin penetrates at least partially or hardly penetrates.
[0030]
In the locking member of FIG. 5, the ferrite-containing layer may or may not exist on the substrate surface of the protruding portion 7. Since the ferrite-containing layer 4 is present on the surface of the porous body 12, the attracting force is increased by approaching the magnet 9 installed on the bottom surface in the longitudinal direction of the concave portion of the mold, and the flat portion 3 and the shoulder portion 6 are in close contact with each other. Can be further strengthened. The ferrite-containing layer of the porous body can be formed by applying ferrite and an adhesive mixed solution to the surface of the porous body, or may be formed by a method of laminating a ferrite-containing film. Further, the porous resin molded body or fiber molded body described above may be formed of a ferrite-containing resin. Furthermore, when the porous resin molded body or the fiber molded body itself and the engaging element are integrated with an adhesive, a ferrite particle may be added to the adhesive.
[0031]
6 is a partial cross-sectional view taken along the line ZZ of FIG. 5 showing a state where the locking member of FIG. 5 is installed in the recess of the mold. When the porous body 12 is thick so as to cover the engaging element 2, the outer portion bottom surface 14 is made lower than the inner portion bottom surface 13 of the mold recess in order to accommodate the thickness. Is preferred. Magnets 8 and 9 are provided on the bottom surface of the inner part and the bottom surface of the outer part, respectively, as in FIG.
[0032]
The locking member by this invention is used for manufacture of resin moldings, such as a sheet | seat for motor vehicles. The above-mentioned locking member is mounted so that the engaging element fits into a concave portion provided in the mold and having a magnet embedded in the bottom surface thereof, and the locking member is engaged with the shoulder portion at the longitudinal end of the concave portion. A flat part at the end in the length direction of the member is placed, and further, the protruding part of the locking member protrudes outside the shoulder part of the recess, and the ferrite provided on the locking member and the bottom of the recess are provided. The end of the locking member in the length direction is sealed by the magnet's attractive force and the ferrite provided on the protruding portion and the attractive force of the magnet provided on the outer bottom surface of the mold corresponding to the position of the protruding portion. Then, a resin molded body with a locking member attached to the surface can be produced by introducing a molding resin into the mold and curing it, and taking out the resin molded body after curing from the mold. In the step of introducing and curing the resin liquid, the molding resin flows into the locking member from the end in the length direction of the locking member by using the locking member and the mold recess. Can be prevented.
[0033]
As the molding resin, a foamable polyurethane resin is preferably used, but is not limited to the resin, and various resins can be used.
[0034]
【The invention's effect】
According to the present invention, when molding a cushion such as an automobile seat or an office chair or other resin molded body, the end portion in the length direction of the locking member for mold-in molding embedded in the surface of the molded body and the concave portion of the mold The molding resin can be prevented from flowing into the locking member and filling the engaging element. As a result, the engaging element on the surface of the resin molded body functions effectively, and the covering covering the resin molded body is firmly locked and fixed, thereby providing a high-quality seat or cushion.
[0035]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not restrict | limited by these Examples.
[0036]
Example 1
A locking member made of polypropylene, a substrate having a width of 7 mm and a thickness of 0.5 mm, and a sealing ear having a thickness and width of 0.5 mm and 3 mm, respectively, are integrally formed through a recess. Engagement elements having a height of 2.5 mm and a width in the length direction of 0.2 mm are formed on the surface side of the substrate to form three rows in the length direction of the substrate and stand vertically on the substrate surface. 60 elements / cm ² Exists at a density of. Each engaging element has a mushroom-like shape in which a tip end portion extends in the width direction of the substrate, and is engaged with the covering material by the mushroom-like shape.
A ferrite-containing acrylic resin layer having an average thickness of 0.3 mm containing 90% by weight of ferrite particles having an average particle diameter of 1.8 microns is formed on the surface having the engagement element by a needle coating method (needle inner diameter 1.0 mm). Is provided.
The engaging element was pressed and melted by an ultrasonic melting method at a portion of 7 mm from the end of the locking member cut to a predetermined length to form a flat portion without the engaging element.
[0037]
The above-mentioned locking member which has a mold recess having a shoulder of 5 mm in thickness at the end of the recess of the mold, a shoulder formed of a magnet and a magnet embedded in the bottom, and a flat portion formed The engaging element on the surface thereof is fitted into the mold, and the flat portion of the locking member is placed on the shoulder of the end of the recess of the mold and mounted in the recess of the mold, and the shoulder of the recess of the mold The engaging element surface of the locking member was sealed by the magnet embedded in the top and bottom and the ferrite attracting force of the locking member, and then polyurethane resin was introduced into the mold and cured.
There was no polyurethane permeation on the engagement element surface of the cushion surface obtained by the above-described mold-in molding method.
[0038]
Example 2
The same locking member as used in Example 1 is formed by forming a portion of 5 mm to 13 mm from the end of the locking member on a flat portion without an engaging element by ultrasonic fusion, and a ferrite resin layer on the flat portion. Was formed by a brush coating method. When the locking member is placed with the same mold as in Example 1, it has a 5 mm thick shoulder (no magnet) at a position 7 mm from the end in the length direction, as shown in FIG. The above-mentioned locking member was attached to a recess provided with magnets on the inside and outside of the recess. The flat portion was placed on the shoulder portion of the recess, and the flat portion of the locking member protruded about 5 mm from the end portion of the shoulder portion.
In the same manner as in Example 1, a polyurethane resin was introduced into a mold and foamed and cured. There was no penetration of polyurethane into the engagement element surface of the obtained cushion surface.
[0039]
Example 3
The locking member that is the same as the locking member used in Example 1 was subjected to ultrasonic fusion treatment in a region having a length of 10 to 17 mm from the end portion thereof, and the engaging element was pressed and melted to form a flat portion having a length of 7 mm. The protrusion part which has the engaging element of 10 mm in length, and a ferrite content layer was formed in the outer side. When the obtained locking member was mounted in the same mold recess as used in Example 2, there was a 10 mm protrusion from the shoulder of the recess. A polyurethane resin was introduced into the mold and foamed and cured. There was no penetration of polyurethane on the engaging element surface of the cushion surface obtained, the engaging element of the protruding portion was embedded in the resin, and the locking member was firmly bonded to the resin.
[0040]
Example 4
The protruding portion of the locking member used in Example 3 was engaged with a porous loop material having a width of 10 mm and a length of 8 mm coated with a ferrite resin layer on one side to create a locking member as shown in FIG. . The obtained locking member was mounted in a forming mold recess as shown in FIG. 6 and molded in by the same method as in Example 1. There was no polyurethane permeation on the engagement element surface of the cushion surface obtained, and the porous loop material and the engagement element of the protruding portion were embedded in the resin, and the locking member was firmly bonded to the resin.
[0041]
Comparative example
In Example 1, mold-in molding was performed by the same method as Example 1 without forming a flat part. The polyurethane had infiltrated into the engagement element surface of the obtained cushion surface from the engagement element standing position to the position of 35 mm inward.
[Brief description of the drawings]
FIG. 1 is a partial plan view showing a structure of an example of an end portion in a length direction of a locking member according to the present invention.
2 is a partial cross-sectional view taken along line XX of FIG. 1 showing a state in which the locking member of FIG. 1 is installed in a concave portion of the mold.
FIG. 3 is a partial plan view showing another example of the end portion of the locking member according to the present invention.
4 is a partial cross-sectional view taken along line YY of FIG. 3 showing a state in which the locking member of FIG. 3 is installed in the recess of the mold.
FIG. 5 is a partial plan view showing another example of the end portion of the locking member according to the present invention.
6 is a partial cross-sectional view taken along the line ZZ of FIG. 5 showing a state where the locking member of FIG. 5 is installed in the recess of the mold.
FIG. 7 is a cross-sectional view showing a state in which a conventional locking member is mounted in a recess.
[Explanation of symbols]
1: Substrate 2: Engaging element 3: Flat portion 4: Ferrite-containing layer 5: Mold recess 6: End shoulder 7: Protruding portion 8, 9: Magnet 10: Ear portion
11: Concave strip 12: Porous body 13: Mold recess bottom surface 14: Mold bottom surface corresponding to the protrusion
A: Locking member B: Surface fastener substrate C: Engaging element D: Buried element
E: Hook and loop fastener tape F: Steel piece G: Cover film

Claims (8)

  An oblong locking member for mold-in, which has a large number of engaging elements on the surface of the substrate, and a ferrite-containing layer is provided in an area where the engaging elements stand, For mold-in, characterized in that it has a flat portion where no engaging element exists on the engaging element surface side of the end portion in the length direction, and further has a protruding portion of 0 to 15 mm in length outside the flat portion. Locking member.   The locking member for mold-in according to claim 1, wherein the surface of the flat portion contains ferrite.   The locking member for mold-in according to claim 1 or 2, wherein the surface of the protruding portion contains ferrite.   The locking member for mold-in according to any one of claims 1 to 3, wherein an engaging element is erected on the protruding portion.   5. The mold-in engagement device according to claim 1, further comprising: sealing ear portions that are continuous at both ends in the width direction of the substrate; and a recess that makes the ear portions flexible with respect to the substrate. Stop member.   There are a number of engaging elements on the surface of the long rectangular substrate, and a ferrite-containing layer is provided in the area where the engaging elements stand, and on the engaging element surface side of the end in the length direction of the substrate A locking member for mold-in having a flat end portion without an engaging element and a protruding portion having a length of 0 to 15 mm on the outside thereof is provided in a recess provided in a molding die and provided with a magnet on the bottom surface thereof. The flat portion in the length direction of the locking member is disposed on the shoulder of the lengthwise end of the concave portion, and the magnet and the locking member provided on the bottom surface of the concave portion are provided. A method for producing a resin molded body with a locking member, wherein the end portion of the locking member in the lengthwise direction is sealed with an attracting force of ferrite, and then a molding resin is introduced into the mold and cured. The locking member according to claim 6, wherein a locking member containing ferrite on the surface of the flat portion is located at an end portion in the length direction of the concave portion and arranged on a shoulder portion made of a magnet. Manufacturing method of resin molding. There are a number of engaging elements on the surface of the long rectangular substrate, and a ferrite-containing layer is provided in the area where the engaging elements are erected, and the engaging element surface side of the longitudinal end of the substrate is engaged. A locking member for mold-in having a flat portion without a compound element and a protruding portion containing ferrite on the outside thereof, a bottom surface on the inner side of the shoulder portion at the end in the length direction of the concave portion provided on the molding die and the outer side It is mounted so that the engaging element fits into the concave portion formed by providing a magnet on the bottom surface, and the flat portion is disposed on the shoulder portion , and the protruding portion of the locking member protrudes outside the shoulder portion. Of the locking member by the magnetic force provided on the inner bottom portion and the outer bottom portion of the shoulder portion, the ferrite containing layer provided in the area where the engaging element is erected, and the ferrite attracting force provided on the protruding portion . Seal the end in the length direction, then introduce molding resin into the mold Manufacturing method of the engaging member with the resin molded body characterized by curing.

Images