JP2001008712A - Molding device of molded hook-and-loop fastener and the fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a both-face molded Hook-and-Loop fastener which is easily maintained and managed, is high in productivity, and is capable of differentiating the engaging directions of both front/end rear surfaces of a plane substrate by having a completely new form on the side of its one surface. SOLUTION: The peripheral surfaces of die wheels 111 having cavities 112 molding a first engaging element rotate-driven in one direction are arranged at necessary intervals opposed to the extruding die 110 of an extruder. A first extruding nozzle 102 provided with a first extruding surface extending in the width direction of the extruding die and a second extruding nozzle 103 arranged on the front surface of the first extruding surface and having a second extruding surface are provided at an end part of the die wheel rotating direction of the extruding die 110. A second extruding nozzle has vertically long rectangular openings 103d arranged with the same pitch in the width direction and a first extruding nozzle has openings 102d for molding plural second engaging element corresponding to the vertically long rectangular openings.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for a molded surface fastener comprising a thermoplastic synthetic resin material and having engaging elements which are individually and continuously molded integrally on the front and back surfaces of a flat substrate. With regard to a molding surface fastener molded by the same molding apparatus, specifically, an engaging element having a completely new form is molded on one surface of a flat substrate, and each engaging element has a variety of sizes from fine dimensions to normal dimensions. Molded surface that can be molded in dimensions, is suitable for various applications in various fields, and can be efficiently molded on both front and back surfaces of a flat base material continuously with a single process using a simplified device The present invention relates to a fastener forming device and a molded surface fastener obtained by the device.

[0002]

2. Description of the Related Art Molded surface fasteners formed from conventional synthetic resin materials are manufactured by various methods. A typical example is a method of manufacturing by a complete batch method by injection molding, and another typical method is to rotate a die wheel having a large number of engaging element forming cavities on a peripheral surface in one direction while rotating the die wheel in one direction. In this method, a molten resin material is continuously introduced into a peripheral surface of the die wheel, and a flat base material and an engaging element are continuously and integrally formed. According to these methods, it is possible to form various types of engaging element shapes such as a palm shape and a hook shape that are widely known in the related art.

Further, as another method, an extrusion die is substantially T-shaped.
A number of T-shaped extrusion ports are juxtaposed, and a T-shaped extrusion port is formed at the lower end of each T-shaped extrusion port to form a substrate extrusion port. A plurality of ribs having a substantially T-shaped cross section are continuously formed, and the molten resin molding material is cooled and solidified. Then
The ribs are sequentially cut with a predetermined thickness while leaving the flat base material perpendicular to the extending direction of the ribs or at an appropriate inclination angle. After this cutting, the flat base material is stretched in the molding direction, and the cut engagement elements are individually separated at a desired pitch to produce a molded surface fastener.

According to, for example, Japanese Patent No. 2756211, a pair of upper and lower die wheels having a large number of engaging element molding cavities on the peripheral surface are driven in synchronization with each other by rotating them in opposite directions. A technique is disclosed in which a molten resin is extruded toward a gap, and a large number of engaging elements are formed and integrated on both front and back surfaces of a flat base material.

[0005]

These molding methods are:
For example, in the technology of continuously forming the surface fastener on the die wheel, in order to improve the productivity is limited by the shape and dimensions of the engaging element, it is difficult to form a complicated form of the engaging element, Also, if it is desired to give a certain degree of freedom to the shape and dimensions of the engagement element, continuous molding is difficult,
Alternatively, the number of steps is increased and productivity is lowered, and in any case, the difference between advantages and disadvantages is remarkable.

On the other hand, in order to give a certain degree of freedom to the cross-sectional shape of the engaging head, the rib of a molten resin molded material having a rib on the surface of a flat base material is cut from the above-mentioned extrusion die and then subjected to a stretching treatment. In the case of adopting the method of performing the above, three steps of extrusion molding, rib cutting and stretching are required, and high processing accuracy is particularly required for the rib cutting, and considerable labor is required for maintenance and management. Time is spent.

The molding surface fastener disclosed in the above-mentioned Japanese Patent No. 2756211, in which a large number of engaging elements are molded and integrated on both front and back surfaces of a flat base material, has a problem in molding by a die wheel. In addition, the protruding direction of the engaging head that engages with the counterpart loop of the engaging element formed by each die wheel may cause a problem in machining the engaging head forming cavity, so that the direction of rotation of the die wheel is Since it is limited to the front and rear, the direction of engagement with the loop of the other party is the same for both sides, and it is impossible to secure the engagement force in multiple directions.

The present invention has been made to solve such a conventional problem. More specifically, the present invention enables simultaneous and continuous molding with a completely new molding mechanism and a conventional molding mechanism, and facilitates maintenance and management. In addition, the productivity is high, and it has a novel form on one side, which is different from the conventional one. It is possible to make the engagement direction different on the front and back surfaces of the flat base material, and it is easy to form the engagement element molding cavity. Accordingly, an object of the present invention is to provide a molding device for a double-sided molded surface fastener capable of molding an engagement element capable of molding various dimensions, and a double-sided molded surface fastener molded by the device.

[0009]

The above objects are achieved by the present invention according to claims 1 to 24 of the present invention. That is, in the invention according to claim 1, there is provided a molding device of a molding surface fastener for integrally molding a flat substrate and a large number of engaging elements by continuous molding, wherein the peripheral surface is formed by an extrusion die of an extruder. A die wheel that is disposed at a required gap in opposition to the die wheel and is driven and rotated in one direction; and a first wheel that is disposed at an end of the extrusion die in the die wheel rotation direction and extends in the width direction of the extrusion die. A first extrusion nozzle having an extrusion port, and a second extrusion nozzle having a second extrusion port corresponding to the first extrusion port and arranged on the front surface of the first extrusion nozzle, and a peripheral surface of the die wheel is provided. It has a number of first engagement element molding cavities, and one of the first extrusion port and the second extrusion port is
At least a plurality of vertically elongated openings arranged at the same pitch in the width direction, and the other extrusion opening has a plurality of second engagement element forming openings arranged corresponding to the vertically elongated opening. , So that the corresponding openings alternately intersect with each other.
Vibration means for relatively vibrating the extrusion nozzle and the second extrusion nozzle in the width direction is provided.

The most characteristic feature of the present invention is that a first extrusion nozzle having a first extrusion port disposed at an end of the extrusion die in a die wheel rotation direction and extending in a width direction of the extrusion die, A second extrusion nozzle having a second extrusion port disposed in front of the first extrusion nozzle and corresponding to the first extrusion port, wherein the extrusion port of one extrusion nozzle and the extrusion port of the other extrusion nozzle have a width. The point is that they are relatively vibrated so as to cross each other in the directions.

The molten resin extruded from the extrusion die to the peripheral surface of the die wheel is partially pushed into the cavity for molding the first engagement element of the die wheel, and the gap between the extrusion die and the die wheel is formed. It is sent out in the direction of rotation along with the rotation of the die wheel. The fed molten resin reaches the first extrusion nozzle arranged at the end of the extrusion die in the rotation direction of the die wheel, and passes through the first extrusion nozzle and the second extrusion nozzle that relatively vibrate in the width direction. In addition, due to the relative widthwise vibration of the first extrusion port and the second extrusion port, they are continuously extruded while sequentially moving from the distal end of the engaging head to the support portion, which is specific to the present invention described later. Simultaneously with the molding of the second engaging element having the form, the second engaging element having the required thickness and having the normal engaging element form on the back surface is formed through the molding space of the flat base material of the first extrusion nozzle or the second extrusion nozzle. A molded surface fastener in which one engaging element is molded and integrated is continuously molded.

[0012] A conventional engaging element molding cavity is formed by combining engaging element forming grooves formed on the periphery of each disk from the peripheral surface to the inside of a die wheel formed by laminating a plurality of disks as in the prior art. Unlike the case of forming the second engaging element, since the opening for forming the second engaging element can be formed only by a single flat plate member, the processing is easy, and therefore there is no particular limitation on the form and dimensions. On the other hand, since the shape of the second engagement element to be formed depends on the shape and size of the opening for forming the second engagement element, the shape of the second engagement element is arbitrary, and its dimension is fine. You can design anything from large to large.

In the invention according to claims 2 and 3, the first extrusion nozzle has the second engagement element forming opening or the vertically long rectangular opening, and the second extrusion nozzle is the vertically long rectangular opening or the second long extrusion opening. An opening for forming the engaging element, and a vertically long rectangular opening of the second extrusion nozzle or a peripheral edge of the opening for forming the second engaging element is formed as a tapered surface gradually expanding toward the extrusion side; An extrusion nozzle is connected to the vibration means.

In these inventions, if the peripheral edge of the elongated rectangular opening or the opening for forming the second engaging element is a tapered surface that gradually expands toward the extrusion side, it is continuous from the first extrusion port of the first extrusion nozzle. When the closing and opening are sequentially repeated by the second extrusion port of the second extrusion nozzle that relatively vibrates the molten resin having a predetermined form to be extruded, if the tapered surface is not formed, the first extrusion nozzle A part of the side surface of the engagement element already pushed out by the first extrusion port of the second
This is for avoiding that the front surface side is crushed by the movement of the second extrusion port of the extrusion nozzle, so that a desired engagement element form cannot be obtained.

The above-described double-sided molded surface fastener molding apparatus comprises:
According to a method of vibrating the first and second extrusion nozzles relatively in the width direction, the invention according to claim 19 includes an extrusion nozzle corresponding to the first and second extrusion nozzles and a vertical vibration member, and a vertical vibration. The member is vibrated in the up-and-down (vertical) direction with respect to the extrusion nozzle to form and integrate the second engagement element on the surface of the flat substrate.

The invention according to claim 4 relates to another typical embodiment, and is a molding apparatus for a molded surface fastener for integrally molding a flat base material and a large number of engaging elements by continuous molding. The peripheral surface is disposed at a required gap in opposition to the extrusion die of the extruder, and a die wheel that is driven and rotated in one direction is disposed at an end of the extrusion die in the rotational direction of the die wheel. An extrusion nozzle having an extrusion port in the width direction of the die, a vertical vibration member disposed on the front surface of the extrusion nozzle, for vertically opening and closing the extrusion port, and a vibration unit for vertically vibrating the vertical vibration member. The peripheral surface of the die wheel has a large number of first engagement element molding cavities, and the extrusion port has a plurality of second engagement element molding openings arranged at the same pitch in the width direction. The vertical vibration member is made of a flat material. Closed position of the extrusion port is in the molding apparatus of the molded surface fastener, which is a position to leave a wall thickness of the flat substrate.

In order to form a double-sided molded surface fastener with the molding apparatus according to the present invention having such a configuration, a part of the molten resin extruded from the extrusion die of the extruder is driven in one direction similarly to the above-mentioned invention. A sheet having a thickness equal to the distance between the extrusion die and the die wheel while being pressed into the first engagement element molding cavity formed on the peripheral surface of the rotating die wheel to form the first engagement element. The molten resin layer is supported on the peripheral surface of the die wheel and rotates around with the rotation of the die wheel. The molten resin layer reaches an extrusion nozzle and a vertical vibration member provided at an end of an extrusion die, and is extruded from an extrusion port of the extrusion nozzle. A gap is provided between the lower end of the extrusion nozzle and the die wheel for the thickness of the flat base material.

The vertical vibration member reciprocates vertically in a state of sliding contact with the front surface of the extrusion nozzle. The lower limit position of the vertical vibration member is the same position as the lower end of the extrusion nozzle, that is, the position where the thickness of the flat base material remains. The molten resin is always extruded from the gap between the lower end of the extrusion nozzle and the die wheel and the second engagement element forming opening, and the vertical vibration member repeats ascending and descending to the lower limit position. The second engagement elements are sequentially and integrally formed at predetermined intervals on the surface of the substrate.

That is, when the lower end of the vertical vibrating member reaches the upper surface of the flat substrate at the lower limit position, the vertical vibrating member starts to rise, and the second engagement element forming openings are sequentially moved upward from the lower end. Open. At this time, the molten resin is also sequentially extruded from below in accordance with the opening shape according to the opening, and when the vertical vibration member finally reaches the upper end of the opening, the second engaging element is substantially pushed in the pushing direction. The first half is molded. Subsequently, the vertical vibration member starts descending, and sequentially closes the opening for forming the second engagement element from the upper end. Contrary to the above-described molding of the first half, the column is formed from the top of the engagement head. The rear half of the engaging element is sequentially formed to the rising end of the part.

The front form of the engagement element substantially coincides with the form of the second engagement element forming opening.
The side surface form of the engagement element is divergent from front to back in the molding direction from the upper end to the lower end. Further, if the elevation speed curve of the vertical vibrating member is variously changed and controlled, the curved surface before and after the divergent portion can be variously changed. The side form is determined by the elevating speed of the elevating member.

Accordingly, an extrusion nozzle having an opening for forming a second engagement element in the vicinity of a conventional surface fastener extrusion molding apparatus having this type of die wheel, a vertical vibration member for vertically opening and closing the opening, By simply providing a vibration means for vibrating the vertical vibration member in the vertical direction, a double-sided molded surface fastener having a novel second engagement element form which cannot be predicted with a conventional molded surface fastener of this type can be obtained. This enables efficient production in a single step, which cannot be expected from conventional molding methods.

According to a fifth aspect of the present invention, the vertical vibration member is formed of first and second comb-shaped plate members having openings formed so as not to overlap each other in the lateral direction. The first and second plate members are arranged back and forth toward the extrusion opening of the extrusion nozzle so that the openings do not overlap, and are alternately moved up and down by each vibrating means. The double-sided molded surface fastener to be molded has a large number of second engaging elements integrally stood on the surface of the flat base material in a staggered manner, so that the engagement ratio with the loop of the other party is improved.

According to the sixth and seventh aspects of the present invention, similarly to the fifth aspect, a molding apparatus for molding the engagement elements in a staggered manner is specifically defined. Has a form in which the first vertical vibration member is formed of a flat plate, and the closing portion of the second vertical vibration member fits into the opening of the first vertical vibration member. The vertical dimension has a dimension equal to or greater than the sum of the length dimension of the closed portion of the second vertical vibration member and the amount of elevation thereof,
The invention according to claim 7 is such that the engaging element forming openings adjacent to the extrusion opening are alternately arranged by a normal opening and a projecting opening, and the opening of the first vertically vibrating member is formed by the projecting engagement. Fits slidably up and down across the element forming opening,
The closing part of the second vertical vibration member is closely slidable up and down on the front surface of the protruding engagement element molding part.

According to an eighth aspect of the present invention, the vibration means of the first aspect has a structure having a control means for changing a vibration speed. The state in which the second engagement element forming opening of the first or second extrusion nozzle and the rectangular opening of the second or first extrusion nozzle close each other's opening, and the relative opening width relative to each other. Due to the vibration, the openings gradually communicate with each other to increase the opening area, and the state changes from the completely open state to the closed state again. At this time, the molten resin carried and carried on the peripheral surface of the die wheel continuously passes through the opening.

At this time, the passing speed of the molten resin is constant, but if the vibration speed of the first and second extrusion nozzles is changed, the increase in the amount of resin passing through the opening within a unit time is determined by the die wheel. , And the engagement element to be formed becomes longer in the rotation direction of the die wheel. According to the present invention, by controlling the vibration speed to be constant or changing, the molding length of the second engagement element to be molded can be arbitrarily determined. That is, if the vibration speed is constant, the molding direction The length of the second engagement element can be uniform, and if the vibration speed is changed during molding, the second
The length of the engagement element can be changed.

According to the ninth aspect of the invention, at least one of the plurality of second engaging element forming openings that are arranged side by side is made different from the height of the other second engaging element forming openings.
In this case, the heights of the plurality of engaging elements which are formed and are arranged in the width direction of the surface of the base material are made different.

[0027] The invention according to claim 10 defines that the die wheel has a cooling means. In the present invention, the molten resin extruded from the extrusion die is
First, a die wheel that is partially pressed into a first engagement element molding cavity formed on the peripheral surface of the die wheel to form the first engagement element, and that rotates while being cooled on the peripheral surface of the die wheel. Is carried on the peripheral surface of the
And the second extrusion nozzle. After forming the second engagement element on the front side of the flat base material having the first engagement element formed on the back side by the first and second extrusion nozzles, the second engagement element is carried on the peripheral surface of the die wheel. When the cooling is progressed to a certain degree, the formed double-sided molded surface fastener is peeled off from the peripheral surface of the die wheel by a take-up roll.

[0028] In the invention according to claim 11, the space between the first extrusion nozzle or the second extrusion nozzle and the die wheel is set to be substantially equal to the thickness of the base material and disposed to face each other. In the present invention, the first extrusion nozzle or the second extrusion nozzle forms the second engagement element on the front surface side of the flat plate base material, and at the same time, holds any one of the edges thereof on the flat plate base material. The thickness is defined and the surface is formed into a flat surface.

The invention according to claim 12 or 13 is intended to define a typical form of the second engagement element, and the opening for forming the second engagement element is substantially T-shaped or substantially Y-shaped. It is shaped like a letter. Due to this opening shape, the form of the second engaging element integrally formed on the surface of the flat base material is substantially T-shaped or substantially Y-shaped with the engaging head extending at a desired angle with respect to the forming direction.
A shaped engagement element is formed. Further, in the invention according to claim 14, both the support portion and the engagement head form a substantially parallelogram having a long side in the molding direction in plan view. The distal end portion of the head forming opening is bent toward the peripheral surface of the die wheel, and the second engaging element to be formed also has a pillar portion in plan view similar to the eighth and ninth embodiments. Also has a parallel square shape having a long side in the molding direction, and a hook-shaped or palm-shaped normal engaging element form in which the engaging head extends at a desired angle to the molding direction while bending toward the surface of the flat base material. Has a form similar to.

The first and second engagement elements having different shapes on the front and back of the flat substrate as described below, particularly the second engagement, are provided by the above-described device invention according to claims 1 to 14. The double-sided molded surface fastener according to any one of claims 15 to 24, wherein the element has a novel form which cannot be assumed conventionally, is manufactured continuously.

According to a fifteenth aspect of the present invention, a large number of first engaging elements are provided on one surface of the flat base material, and a large number of second engaging elements are provided on the other surface.
What is claimed is: 1. A molded surface fastener integrally molded from a synthetic resin material having an engaging element, wherein said first and second engaging elements are a pillar part standing on a surface of said flat base material, and said pillar part. A length extending from the support section of the second engagement element and the cross-sectional shape of the engagement head at an angle of 0 ° or more and less than 90 ° with respect to the molding direction. A molded surface fastener characterized by having a substantially parallelogram shape having sides, and wherein the second engaging elements (12) arranged adjacent to each other in the molding direction have mirror-symmetrical shapes with each other. .

Here, a substantially T-shaped rib is continuously and integrally extruded together with a flat base material by a conventional extruder, and after cooling this, only the rib is cut at a predetermined pitch in the length direction. Next, the base material is stretched in the extrusion direction, and in a molded surface fastener manufactured with a predetermined interval between the engaging elements obtained by cutting, the projecting direction of the engaging head is mainly formed. The engagement elements which are transverse to the direction and which are adjacent to the molding direction are arranged parallel to one another. Furthermore, in the molded surface fastener which has become a product, in order to arrange the engaging elements at intervals in the molding direction after cutting the substantially T-shaped rib, the base material must be stretched in the molding direction. At the base end portion of the support portion of the combined element, the wall pressure of the base material becomes larger than the thickness of other base materials, and the base material surface is slightly wavy in the length direction.

On the other hand, the projecting direction of the engaging head of the engaging element in the molded surface fastener according to the present invention is arranged at an intersection angle of 0 ° or more and less than 90 ° with respect to the molding direction. The engaging elements arranged adjacent to each other in the direction have mirror-symmetrical forms with each other. Further, since the molded surface fastener as a product is not subjected to special secondary processing such as cutting or stretching as in the conventional case, a very uniform and stable form including the base material can be obtained.

According to a sixteenth aspect of the present invention, the thickness of the column portion of the second engaging element arranged adjacent to the molding direction and the protruding length of the engaging head are periodically determined in the molding direction. In the invention according to claim 17, the thickness of the support portion of the second engaging element arranged adjacent to the molding direction in the same direction and the protruding length of the engaging head are set as follows. , In the molding direction. In order to form an engaging element having these forms, the vibration speed may be changed periodically or randomly. Further, in the invention according to claim 18, the height from the base material to the apex of the second engagement elements adjacent to each other orthogonally to the molding direction is made different. Such a form,
It is formed by a forming device in which at least one or more of the plurality of second engaging element forming openings arranged in the lateral direction has a height different from that of the other second engaging element forming openings. You.

The above-mentioned double-sided molded surface fastener is manufactured by a method in which the first and second extrusion nozzles are relatively vibrated in the width direction, and the invention according to claims 19 to 21 is based on the first and second extrusion nozzles. (2) An extrusion nozzle corresponding to the extrusion nozzle and a vertical vibration member are provided, and the vertical engagement member is vibrated up and down (vertically) with respect to the extrusion nozzle to form and integrate the second engagement element on the surface of the flat substrate. Is what you do.

In the invention according to claim 19, a synthetic resin material having a large number of first engagement elements on one surface of the flat base material and a large number of second engagement elements on the other surface is integrally formed. A molded surface fastener, wherein the first and second engaging elements are composed of a column standing upright on the surface of the flat substrate, and an engaging head extending from a tip of the column. The second engaging element is characterized in that the thickness of the second engaging element in the direction perpendicular to the direction in which the engaging head projects is gradually increased from the top of the engaging head to the base end of the support. Molded surface fasteners.

According to the double-sided molded surface fastener of the present invention having such a form, a large number of first engaging elements formed and integrated on one surface of the flat base material are formed into a required form according to the purpose of use. The same effect is obtained as in the prior art, but a large number of the second engagement elements formed and integrated on the other surface of the flat base material in the present invention are parallel to the flat surface of the flat base material. Direction (shearing force) or a pressing force from an obliquely upward direction of the base material, it does not easily collapse, and the loop, which is a mating engaging element, is inclined obliquely upward in a state of being engaged with the support portion. When pulled, the loop is inevitably guided to the boundary region between the strut and the engagement head, so that the engagement head does not rise in the loop and the engagement is not easily released. . This engaging element also has a substantially parallelogram shape in plan view.

On the other hand, the front and rear width of the engaging head of the second engaging element is also gradually increased from the top to the base in the direction perpendicular to the projecting direction, so that the engaging element is unlikely to fall down. In addition, not only is it easy to invade the loops of the opponent, but also to push each loop laterally at the time of invasion, despite the engaging head becoming gradually wider toward the tip in the protruding direction, Insertion into the loop is facilitated. Moreover, the mating loop once engaged is recessed toward the neck, which is the boundary between the engaging head and the column, as compared with the conventional molded surface fastener having the same width in the same direction. Therefore, the engagement is further difficult to be released, and all of the engagement rate, the engagement force, and the peeling force are increased.

According to a twentieth aspect of the present invention, the direction in which the engaging head of the second engaging element protrudes is a direction orthogonal to the forming direction of the forming surface fastener. As described above, the surface fastener of this embodiment can be continuously formed without manufacturing a conventional molding die for an engagement element having a special shape, so that productivity is remarkably improved.

According to a twenty-first aspect of the present invention, a large number of the second
The engaging elements are arranged in rows in the molding direction of the base material and are composed of a large number of rows, and the second engaging elements adjacent to each other between the rows are arranged in a staggered manner. With the arrangement of the engagement elements, the engagement with the counterpart loop is not regular, and the engagement is randomly performed on the whole, so that the engagement ratio is greatly improved.

The form of each of the engagement elements is determined by the shape of the second engagement element forming opening of the extrusion port.
According to the invention of claim 22, the longitudinal section of the engagement element is substantially T-shaped. At this time, the second engagement element forming opening also has a substantially T-shaped overall shape. In the invention according to claim 23, the longitudinal section of the engagement element is substantially Y-shaped, and the shape of the second engagement element forming opening at this time is substantially Y-shaped.

Further, in the invention according to claim 24, it is specified that the tip of the engaging head is bent toward the surface of the base material, and the form is such that the engaging head is separated from the column. A typical case is a hook shape that protrudes downward in only one of the molding directions and curves downward, and a case where the engaging head protrudes forward and backward in the molding direction from the column and curves downward. It is. According to this embodiment, in addition to the above-described operation and effect, even when the mating loop is pulled upward, the loop is less likely to come off from the engaging head. The engagement force is further increased as compared with the case where the protrusion simply protrudes straight from the portion.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, typical embodiments of the present invention will be specifically described based on illustrated examples. Needless to say, the embodiments described below are representative examples in which the present invention can be best understood, and it is apparent from the following description that the present invention is not limited to these embodiments. FIG. 1 is a partial side view of a double-sided molded surface fastener provided with an engaging element having a typical form of the present invention, and FIG. 2 is a plan view of the double-sided molded surface fastener as viewed from the front side. In addition,
In these figures, directions indicated by arrows indicate molding directions by the molding apparatus of the present invention.

In the double-sided molded surface fastener 10 according to the first embodiment, a large number of first and second engaging elements 12 and 13 are provided independently and continuously on the back and front surfaces of a flat base material 11, respectively. And each of the engagement elements 12, 1
Reference numeral 3 denotes support columns 12a, 13a rising from the front and back surfaces of the flat base material 11, and engagement heads 12b, 1 protruding forward and backward in the molding direction from the tips of the support columns 12a, 13a.
3b.

As shown in FIG. 1, the first engagement element 12 integrally formed on the back surface of the flat substrate 11 is formed in one direction from the support 12a toward the back surface of the flat substrate 11 in a side view. It consists of a regular hook-shaped engaging element having an engaging head 12b extending in a curved manner. As can be understood from FIG. 1, a reinforcing rib 12c is integrally formed on the side surface of the support portion 12a. I have. The plane cross section of the first engagement element 12 has a rectangular shape long in the molding direction.

On the other hand, as shown in FIGS. 1 and 2, the second engaging element 13 integrally formed on the surface of the flat base material 11 has a substantially T-shaped overall shape. Each pillar part 1
3a and the engagement head 13b extend at a required angle to the molding direction. Moreover, the forms of the second engagement elements 13 adjacent to each other in the molding direction are mirror-symmetrical to each other, and FIG.
In the plan view shown in FIG.
Are almost parallelograms long in the molding direction. On the other hand, the engaging elements 13 adjacent to each other in a direction orthogonal to the molding direction have the same form and are arranged in parallel with each other.

The double-sided molded surface fastener 10 of the present invention having the above-described first embodiment is continuously and efficiently molded by the molding apparatus according to the present invention described below. 3 and 4 show a schematic configuration of a molding apparatus for a double-sided molding surface fastener which is a typical embodiment of the apparatus of the present invention. FIG. 3 is an exploded perspective view schematically showing a molding section of the molding apparatus. FIG. 4 is a front view of the molded part. FIG. 5 is a longitudinal sectional view schematically showing a forming mechanism by the forming apparatus according to the present invention.

The molding apparatus 100 of the present invention comprises: an extrusion die 110 of an extruder; a die wheel 111 which is a first engagement element molding portion having a peripheral surface opposed to the extrusion die 110 with a required gap. The die wheel 11 of the extrusion die 110
The second engaging element molding portion 10 installed at the end in the rotation direction of the first
1 is provided.

As is well known, the die wheel 111 has a plurality of first engaging element molding cavities 112 formed on a peripheral surface thereof, and a coolant circulates inside and outside the die wheel 111 to form a wheel surface. Has cooled. The structure of these die wheels 111 is described, for example, in US Pat.
Since it is substantially the same as that disclosed in the specification of US Pat. No. 5,310, its detailed description is omitted.

One second engaging element forming portion 101 is provided with a first extrusion nozzle 102 fixedly mounted on the extrusion die 110,
The second vibrating sideways with respect to the first extrusion nozzle 102
The apparatus includes an extrusion nozzle 103 and a vibration unit 104 that vibrates the second extrusion nozzle 103 in a lateral direction along the front surface of the first extrusion nozzle 102. Lower ends of the first and second extrusion nozzles 102 and 103 and the die wheel 111
A gap corresponding to the thickness of the flat base material 11 is provided between the flat base material 11 and the peripheral surface.

As can be understood from FIGS. 3 and 4, the first extrusion nozzle 102 has a rectangular shape in which the surface facing the peripheral surface of the die wheel 111 is set to be substantially equal to the curvature of the peripheral surface of the die wheel 111. And a sliding guide portion 102a for the second extrusion nozzle 103 on the front surface. The sliding guide portion 102a cuts the lower half of the front surface of the rectangular block into a rectangular shape, and cuts out the slit-shaped guide surface 102b in the upward direction on the same plane as the front surface of the cut portion. Has formed. Rail surfaces 102c are formed on the slit-shaped guide surface 102b so as to cross the guide surface 102b.

A large number of substantially T-shaped molten resin passages 102d communicating from the front to the back of the cut portion of the first extrusion nozzle 102 are formed at a predetermined pitch in the horizontal direction. The molten resin passage 102d of one extrusion nozzle 102 corresponds to the second engagement element molding opening of the present invention. The molten resin passage 102d on the back side is an extrusion die 1
Opened in the gap between the die wheel 10 and the die wheel 111, the gap is carried on the peripheral surface of the die wheel 111, and the molten resin sent along with the rotation of the die wheel 111 is introduced into the molten resin passage 102d. .

The second extrusion nozzle 103 is connected to the slit-shaped guide surface 102b and the rail surface 1 of the first extrusion nozzle 102.
02c, and is slidably guided in the lateral direction. for that reason,
The second extrusion nozzle 103 is provided with the slit-shaped guide surface 10.
2b and a flat surface having a cross-section fitted to the rail surface 102c are formed in a substantially cross-section, and the lower half thereof has the T-shaped molten resin passage of the first extrusion nozzle 102 (for forming the second engaging element). A vertical rectangular opening 103d having the same height as the opening 102d
Are formed in the lateral direction at the same pitch as the T-shaped molten resin passage 102d.

The vibrating means 104 is provided at one lateral end of the second extrusion nozzle 103. In this embodiment, the vibration means 104 includes a rotary drive motor 104a.
And a rotating disk 1 fixed to the output shaft of the motor 104a.
An eccentric pin 104c protruding to the eccentric position of 04b, and a link 104d connecting the eccentric pin 104c and one end of the second extrusion nozzle 103 are provided.

According to the molding apparatus of the double-sided molded surface fastener 10 according to the present embodiment having the above-described configuration, the molten resin is directed from the extrusion die 110 of the extruder toward the peripheral surface of the die wheel 111 as shown in FIG. Pushed out. The die wheel 111 is driven and rotated in one direction (clockwise in the illustrated example) by a driving source (not shown). Most of the molten resin extruded from the extrusion die 110 to the peripheral surface of the die wheel 111 is carried on the peripheral surface, and rotates around as the die wheel 111 rotates. Further, a part of the molten resin is pushed into a first engagement element molding cavity 112 formed on the peripheral surface of the die wheel 111, and the first engagement elements 12 are sequentially molded.

The molten resin carried around the peripheral surface of the die wheel 111 reaches the second engaging element forming portion 101 installed on the downstream side, and enters the T-shaped molten resin passage 102 d of the second extrusion nozzle 102. It is introduced and pushed out of the same passage 102d forward. At this time, on the front surface of the first extrusion nozzle 102, the second extrusion nozzle 103 is vibrating in the horizontal direction at a predetermined speed. The molten resin extruded from the first extrusion nozzle 102 and having a T-shaped cross section is cut to a required length by a rectangular opening 103d of a second extrusion nozzle 103 that vibrates in the lateral direction at the front surface of the first extrusion nozzle 102, and is cut into a second length. The flat base material 11 is formed at the same time as the engagement element 13 is formed.

The molding procedure at this time is shown in FIGS. According to these figures, the first engagement element 1
A molding procedure of the second engagement element 13 formed on the surface of the flat base material 11 obtained by molding and integrating 2 will be specifically described. In these drawings, the molding cavity 112 of the first engagement element 12 formed in the die wheel 111 is not shown.

Now, the second extrusion nozzle 103 is slid in the direction of the arrow shown in FIG. 6, and the rectangular opening 103d is a part of the T-shaped molten resin passage 102d of the first extrusion nozzle 102. After reaching the end of the opening 102d-2, the movement in the same direction is continued (see FIG. 7A), and the head is moved while reaching the support forming opening 102d-1 of the T-shaped molten resin passage 102d. The cross-sectional area with one protruding part of the part forming opening 102d-2 gradually increases, and the molten resin Mr, which has been prevented from passing at the closed part of the second extrusion nozzle 103, gradually increases the amount of resin passing therethrough. One protruding form of the engagement head 13b is a wedge shape having a sharp end (see FIG. 8B).

Subsequently, the rear end of the elongated rectangular opening 103d in the sliding direction passes through the end of the head forming opening 102d-2, and from the end thereof, the column forming opening 102d-.
As shown in FIG. 9 (B), the head forming opening 102d-2 and the support forming opening 102d-1 are sequentially closed by the rear end in the sliding direction as shown in FIG. As shown in FIG. 10 (B) and FIG. 11 (B), the second engaging element 13 is formed in a form having a desired crossing angle θ with the forming direction when viewed from a plane. Intersection angle θ at this time
Is determined by the sliding speed of the second extrusion nozzle 103.

Here, when the second extrusion nozzle 103 continues to move so as to cross the column forming opening 102d-1, the amount of resin passing through the vertically long rectangular opening 103d initially increases gradually, and the rectangular opening 103d Is overlapped with the column forming opening 102d-1 (see FIG. 9), and the center of the engaging head 13b and the column are formed as a parallelogram-shaped flat cross section inclined at a certain angle with respect to the resin extrusion direction. 1
3a is formed.

Further, when the rectangular opening 103d continues to move in the same direction and passes through the pillar forming opening 102d-1, a rectangular shape is formed based on the shape of the other protruding portion of the head forming opening 102d-2 and the overlapping portion. The amount of resin passing through the opening 103d gradually decreases, a part of a parallelogram cross section is formed (see FIG. 11), and the rectangular opening 103d completely passes through the second engagement element forming opening 102d and becomes a single unit. The molding of the second engagement element 13 is completed (FIG. 12). The parallelogram shape at this time is composed of two sides having the intersection angle θ with the molding direction and two sides parallel to the molding direction.

In this embodiment, as described above, the periphery of the rectangular opening 103d has a tapered surface, and the inclination angle θ 'between the tapered surface and the molding direction is smaller than the intersection angle θ. 9 to 11 are also set to be large.
As is clear from FIG.
03d moves while crossing the second engaging element forming opening 102d of the first extrusion nozzle 102, and
The rear edge of the 3d moving side is the opening 10 for forming the second engagement element.
When the 2d is sequentially closed, the portion of the molten resin extruded first from the rectangular opening 103d is prevented from being crushed by the rear end of the rectangular opening 103d, and is formed into a uniform and stable second engagement element form.

When the above operation is completed and the single second engaging element 13 is formed, the second push-out nozzle 103 starts to move in the direction opposite to the above-described direction. At the time of the movement in the opposite direction, the second engagement element 13 formed at the time of forward movement is in a form just inverted, that is, a plurality of parallelogram sections having a mirror-symmetrical form with the second engagement element 13. The second engagement elements 13 are formed in a horizontal row. Thus, the second engagement element 13
Is formed, the inner peripheral surface of each vertically elongated rectangular opening 103d of the second extrusion nozzle 103 is tapered so as to gradually widen in the extrusion direction.
The molten resin Mr extruded from the second rectangular opening 103
After passing through d, it can be formed into a desired shape without being crushed by the peripheral edge of the vertically-long rectangular opening 103d.

In this manner, each time the second extrusion nozzle 103 repeats reciprocating motion, the plurality of second engaging elements 13 in one row on the front surface and the flat substrate 11 having the first engaging elements 12 on the back surface are simultaneously formed. As a result, a continuous elongated flat substrate 11 having a desired number of first and second engagement elements 12 and 13 on the front and back is obtained. At this time, as described above, the engaging head 12b of the first engaging element 12 projects in parallel with the molding direction, and the engaging head 13b of the second engaging element 13 intersects the molding direction at a predetermined intersection angle θ. Are arranged in a zigzag pattern. In addition,
The second engaging elements 13 adjacent to each other in the width direction of the hook-and-loop fastener 10 perpendicular to the extrusion direction are all arranged in parallel with the same intersection angle θ.

While the first engaging elements 12 formed on the back surface of the flat base material 11 remain in the engaging element forming cavities 112 of the die wheel 111, a large number of second engaging elements 12 are formed on the surface of the base material 11. The double-sided molded surface fastener 10 in which the composite element 13 is molded is cooled and solidified until a certain degree of hardness is obtained by rotating around a half of the peripheral surface of the die wheel 111 with the rotation of the die wheel 111, and then solidifying the pickup roller 1
13, the first from the engagement element molding cavity 112
At the same time as the engaging element 12 is pulled out, it is peeled off from the peripheral surface of the die wheel 111 and is sent out to the next step or a winding section via a feed roller (not shown).

FIG. 13 and FIG.
An example of the second engaging element 13 having another form formed on the front surface side of the flat base material 11 of the double-sided molded surface fastener 10 formed by the above method is described. The form of the second engagement element 13 is the second engagement element forming opening 1 of the first extrusion nozzle 102.
The second engagement element molding opening 102d has a shape substantially similar to that of the second engagement element forming opening 102d. As shown in FIG. 13, a coconut tree shape in which the engaging head 13b is curved toward the surface of the base material 11 or a branch extending from the upper end of a single support 13a into two branches as shown in FIG. In the case of forming a substantially Y-shaped engaging element having the joint portion 13b, the shape of the second engaging element forming opening 102d may be formed in the same manner.

Further, in the above-described molding apparatus, the control device 1
In the case where the vibration speed is periodically changed according to the step 09, for example, as shown in FIG.
a and the engaging head 13b in the forming direction can be varied, or the second engaging element forming opening 102d and the vertically long rectangular opening 10 can be arranged side by side as shown in FIG.
By changing the height of 3d, engaging elements having different heights in the width direction of the flat base material 11 can be simultaneously formed. The second engagement elements 13 having different heights as described above,
In the case where 13 is formed on the surface of the flat base material 11, even if the loops, which are the opposite female members, have different heights, they engage with each other while complementing each other, so that the engaging force is improved.

The illustrated examples show typical examples. For example, the control of the vibration speed by the control device 109 is not periodically changed as described above, but the vibration speed is changed at random. In this case, as shown in FIG. 16, the thickness of the second engaging element 13 adjacent in the molding direction naturally changes randomly.

FIG. 18 shows the present invention in which a vertically long rectangular opening 102d 'is formed as the extrusion opening of the first extrusion nozzle 102 and the shape of the engaging element to be formed as the extrusion opening of the second extrusion nozzle 103 is shown. A second engaging element forming opening 103d 'is formed. That is, in the present embodiment, the rectangular opening 102d 'and the second engaging element forming opening 103d' are formed in the first extrusion nozzle 102 and the second extrusion nozzle 103, respectively, contrary to the above embodiment. .

The double-sided molded surface fastener 10 shown in FIGS. 19 and 20 is molded by the apparatus of the embodiment shown in FIG. These double-sided molded surface fasteners 10 are not arranged in a zigzag shape as described above, and all of the second engagement elements 13 are arranged straight on a straight line parallel to the molding direction. That is, the engagement head 13b of the second engagement element 13 projects parallel to the molding direction. However, the embodiment of the double-sided molded surface fastener 10 also has the second engagement elements 13 arranged in a straight line in the molding direction as shown in FIGS. 19 and 20, for example.
The second engaging elements which are adjacent to each other in the same direction are substantially parallelogram in plan view and mirror-symmetric with each other, similarly to the above embodiment. However, the long side portion is parallel to the molding direction, the short side portion is formed at a certain intersection angle θ with the molding direction, and the short side portion adjacent to the molding direction is in a zigzag state as in the above embodiment. Has become.

All the forms of the second engagement element 13 described above are
This is a unique form inevitably formed by the molding apparatus of the present invention. In addition, since all of the second engagement elements 13 according to the present invention are independently and integrally formed on the surface of the flat substrate 11, the engagement elements obtained by the above-described conventional rib cutting and substrate extension can be used. By comparison, the overall shape of the second engagement element 13 is rounded and the touch is good.

As described above, the engagement element configuration shown in FIGS. 19 and 20 is the same as that of the first embodiment in the first embodiment.
It can be obtained simply by changing the opening form of the extrusion nozzle 102 and the second extrusion nozzle 103. That is, in the apparatus of this embodiment, the opening of the first extrusion nozzle 102 is
The opening of the second extrusion nozzle 103 is formed as a substantially T-shaped second engagement element forming opening 103d '.

Next, the molding apparatus shown in FIG.
FIG. 2 shows the molding principle of the second engagement element 13 having the form shown in FIG.
This will be briefly described with reference to FIGS. Die wheel 1
The molten resin Mr carried and carried on the peripheral surface of the eleventh is the first resin.
It passes through a vertically long rectangular opening 102d 'of the extrusion nozzle 102. At this time, the second extrusion nozzle 103 is reciprocating in the left-right direction while being in contact with the front surface of the fixed first extrusion nozzle 102. In these drawings, the illustration of the first engaging element molding cavity 112 of the die wheel 111 is omitted.

Now, the second extrusion nozzle 103 slides in the direction of the arrow shown in FIG. 21, and the head forming opening 103d'-2 of the second engagement element forming opening 103d 'is the first.
After reaching the end of the rectangular opening 102d 'of the extrusion nozzle 102, the movement in the same direction is continued (see FIG. 22 (A)).
d 'while the head forming portion opening 103d'-2
The cross-sectional area with one of the projecting portions gradually increases, and the molten resin Mr
Gradually increases the amount of resin passing therethrough, and the engaging head 13b
The shape of one of the protruding portions is formed in a wedge shape having a sharp end portion in which one side has a predetermined intersection angle θ with respect to the forming direction and the other side is a straight line parallel to the forming direction (FIG. 23).
(B)).

Subsequently, as shown in FIG. 24A, when the column forming opening 103d'-1 of the second extrusion nozzle 103 keeps moving across the rectangular opening 102d ', the rectangular opening 102d' Is formed with a molten resin passing through the support portion 13a having a parallelogram cross section inclined at a certain crossing angle θ with respect to the resin extrusion direction, and the engaging head 13b is linearly formed with the width of the rectangular opening 102d ′. The molding is continued in the molding direction (see FIG. 2).
5). The intersection angle θ is determined by the operation speed of the second extrusion nozzle 103.

Further, the second engaging element forming opening 103 is formed.
d 'continues to move in the same direction, and its pillar forming opening 1
When 03d'-1 passes through the rectangular opening 102d ',
The amount of resin passing through the rectangular opening 102d 'is gradually reduced based on the shape and overlap of the other protruding portion of the head forming opening 103d'-2, and a part of a parallelogram cross section is formed (FIGS. 26 and 27). ), Completely with the head forming opening 10
When 3d'-2 passes through the rectangular opening 102d ', molding of the single second engagement element 13 is completed (see FIG. 28).

When the above-described operation is completed and the single second engaging element 13 is formed, the second push-out nozzle 103 moves in the direction opposite to the above-described direction. When moving in the opposite direction,
A plurality of second engaging elements 13 having a parallelogram cross-section having a form exactly inverted from the second engaging element 13 formed at the time of forward movement, that is, having a mirror-symmetrical form with the engaging element 13,
The engagement head 13b is formed with its long side parallel to the molding direction.

In this manner, each time the second extrusion nozzle 103 repeats reciprocating motion, the flat base material 1 having the plurality of second engagement elements 13 in a row on the front surface and the first engagement elements 12 on the back surface is provided.
1 are formed at the same time, and a desired number of second bases 11 and a long side portion of the engaging head 13b are formed in parallel with the forming direction.
The engagement element 13 is formed continuously. Also in this embodiment device, the double-sided molded surface fastener 10 extruded from the second extrusion nozzle 103 and continuously molded in the same manner as the above-described embodiment device is the peripheral surface of the die wheel 111 which then rotates in one direction. After being accompanied by a half rotation, the light is picked up by a pickup roller 113 and sent out to a next step or a winding section via a feed roller (not shown).

FIGS. 29 and 30 show a further embodiment of the present invention. In the figure, the second engagement element molding portion 101 is essentially different from the above-described embodiment device. A die wheel 111 whose peripheral surface is driven and rotated in one direction with a required gap opposed to the extrusion die 110 of the extruder 100 is installed, and at the end of the extrusion die 110 in the die wheel rotation direction, An extrusion nozzle 105 having an extrusion port in the width direction of the extrusion die 110 is fixedly provided. On the front surface of the extrusion nozzle 105, a vertical vibration member 106 for opening and closing the extrusion port up and down is arranged in close contact. The vertical vibration member 106 vibrates up and down by vibrating means 104. The structure of the die wheel 111 is substantially the same as that of the above-described embodiment.

In the width direction of the extrusion nozzle 105, a plurality of second engagement element forming openings 105a as the extrusion ports are formed at the same pitch. According to the illustrated example, the second
The engagement element forming opening 105 a is formed in a substantially T shape, and communicates with the back surface of the extrusion nozzle 105. The vertical vibration member 106 is made of a horizontally long plate material, and the closed position of the second engagement element forming opening 105 a is set to the flat base material 11 of the double-sided molded fastener 10 with respect to the peripheral surface of the die wheel 111.
This is the position where the wall thickness is left.

The vertically vibrating member 106 has a wedge-shaped cross section having a flat surface as a contact surface with the extrusion nozzle 105 and a rear surface inclined downward to form an inclined surface which joins at a lower end of the flat surface. It consists of a metal plate. The upper end of the vertical vibration member 106 is
Is provided. The vibrating means 104 in this embodiment has the same configuration as that of the first embodiment, and includes a rotary drive motor 104a and an eccentric pin 104c projecting to an eccentric position of a rotary disk 104b fixed to an output shaft of the motor 104a.
And a link 104d connecting the eccentric pin 104c and the center of the upper end edge of the vertical vibration member 106. Although not shown, a sliding guide surface for vertically reciprocating the vertical vibration member 106 is provided at the left and right side edges of the extrusion port of the extrusion nozzle 105.

Next, a forming mechanism of the double-sided molded surface fastener 10 having a typical form by the double-sided molded surface fastener forming apparatus having the above-described configuration will be described with reference to FIGS. From 110, molten resin Mr is extruded toward the peripheral surface of die wheel 111. The die wheel 111 is driven and rotated in one direction (clockwise in the illustrated example) by a driving source (not shown). The molten resin M extruded from the extrusion die 110 to the peripheral surface of the die wheel 111
Most of the r is carried on the peripheral surface, and the die wheel 11
It goes around with one rotation. Further, a part of the molten resin Mr is pushed into a first engagement element molding cavity 112 formed on a peripheral surface of the die wheel 111, and the first engagement element 12 is sequentially molded.

The molten resin Mr carried around the peripheral surface of the die wheel 111 reaches the second engaging element forming section 101 installed on the downstream side, and the T-shaped second engaging element of the extrusion nozzle 105. Introduced into the molding opening 105a,
It is pushed forward from 05a. At this time, on the front surface of the extrusion nozzle 105, the vertical vibration member 106 vibrates in the vertical direction at a predetermined speed. The molten resin Mr having a T-shaped cross section extruded from the extrusion nozzle 105 is
The second engaging element 13 is formed by the vertically vibrating member 106 which vibrates in the vertical direction on the front surface of the base material 05 and at the same time
Mold 1.

According to the embodiment shown in FIG.
06 is the upper end position of the second engaging element forming portion 101, in other words, the upper end position of the forming opening of the engaging head 13b, and the lowering limit position of the vertical vibration member 106 is as described above. Flat base material 1 between the peripheral surface of die wheel 111
This is the position where the thickness of 1 is left.

Therefore, during the extrusion, the extrusion die 110
The molten resin extruded toward the peripheral surface of the die wheel 111 from the first engagement element 12
When it is rotated with the die wheel 111 while reaching the extrusion nozzle 105, the molding of the flat base material 11 and the molding of the second engaging element 13 on the surface side are simultaneously performed.

Now, the vertical vibration member 106 has reached the lower limit position, that is, the upper surface position of the continuously extruded flat substrate 11, and the second engagement element forming opening 105a of the extrusion nozzle 105 is closed. The vertical vibration member 10
6 starts rising, the second engagement element forming opening 1
05a are sequentially opened upward from the lower end (see FIG. 31). At this time, the molten resin also corresponds to the opening of the opening,
When the vertical vibrating member 106 reaches the upper end of the opening, it is sequentially pushed out from below along the opening shape.
As shown in FIG. 2, almost the first half of the second engaging element 13 in the pushing direction is formed, and then the vertical vibrating member 106 starts descending, and the second engaging element forming opening 105a is sequentially placed from the upper end. It is closed (see FIG. 33), and the column 13a extends from the top of the engaging head 13b in reverse to the above-described molding of the first half.
The second half of the second engaging element 13 is sequentially molded to the rising base end of the substrate, and when this molding is completed, the closed state is maintained for a predetermined time and the surface of the flat substrate 11 is molded (see FIG. 34). .

With this forming mechanism, the front form of the second engaging element 13 is changed to the second engaging element forming opening 105a.
35, the side shape thereof is determined by the vertical movement speed of the vertical vibration member 106. As shown in FIGS. 35 and 36, the second engagement element 13
Has a flared shape from front to back in the molding direction from the upper end to the lower end. Further, if the elevation speed curve of the vertical vibration member 106 is variously changed and controlled, the above-mentioned curved surface before and after the divergent portion can be variously changed.

The second engagement element 13 shown in FIGS. 35 and 36
When the engagement head 13b is viewed from the front, the engagement head 13b is
Of approximately T protruding left and right, curved downward in an arc from the upper end of
When this second engagement element 13 is viewed from the side, as shown in FIG. 35, the rising start of the support 13a from the top of the engagement head 13b with respect to the flat base material 11 is started. The thickness is gradually increased toward. This gradual increase is achieved not only by the support 13a but also by the engagement head 13
Similarly, the thickness of the engaging head 13b gradually increases in the direction perpendicular to the projecting direction of the engaging head 13b as it goes downward. It can be set arbitrarily by changing the speed at which the vibration member 106 moves up and down.

As described above, the second embodiment according to this embodiment is described.
The engaging element 13 has a force (shearing force) in the direction parallel to the surface of the flat base material 11 or the above-mentioned force, since the strut portion 13a gradually increases the thickness in the front, rear, left and right directions toward the rising start end. When the loop is not easily collapsed by the pressing force from obliquely above the base material 11 and is pulled obliquely upward in a state in which a loop (not shown), which is a mating engaging element, is engaged with the column 13a. Since it is inevitably guided to the boundary region with the engagement head 13b, the engagement head 13b does not rise in the loop, and the engagement is not easily released.

Similarly, the front and rear width of the engaging head 13b, which is orthogonal to the projecting direction, is gradually increased from the top to the lower end. However, since each loop is pressed and pushed in the lateral direction at the time of its intrusion, the tip of the engaging head 13b can be easily inserted into the loop in the above-described manner, and the same width and the same width can be obtained in the same direction. Compared with the conventional engaging element, the neck portion, which is the boundary between the support portion 13a and the engaging head 13b, is in a hollow state. It becomes difficult to be disengaged and increases any of the engagement rate, the engagement force, and the peeling force.

FIG. 37 shows a modification of the second engagement element 13 shown in FIG. 36. When the second engagement element 13 is viewed from the front, the top of the engagement head 13b has a simple arc shape. Instead, its center is cut into a substantially V-shape. With this configuration, the neck portion 13c, which is the boundary portion between the engaging head 13b and the column portion 13a, becomes thinner. When the female surface fastener of the mating partner is peeled off, the female fastener becomes easily bent upward around the neck portion. Occasionally, no abnormal noise is generated, and the film can be peeled off smoothly.

FIG. 38 shows a further modification of the second engagement element 13 shown in FIG. 36. As is apparent from FIG.
A substantially Y-shaped second engagement element 13 having an engagement head 13b that branches off in the left-right direction in a bifurcated manner from the upper end of a pillar 13a that is thick in the left and right directions when viewed from the front; The substantially V-shaped notch formed between 13b has a large form. With this configuration, the second engagement element 13 shown in FIG.
It becomes easier to bend as compared with, the resistance at the time of peeling is reduced, and smooth peeling becomes possible.

In this way, each time the vertical vibration member 106 repeatedly moves up and down, the plurality of second engagement elements 13
And the flat substrate 1 integrally formed with the first engagement element 12 on the back surface
1 is formed at the same time, and a base material 11 of a desired length and a desired number of the first and second engagement elements 12, 13 form a parallel row with a predetermined pitch in the forming direction in a double-sided molded surface fastener 10. Formed continuously.

FIG. 39 shows the configuration of the second engagement element 13 shown in FIG.
2 shows a double-sided molded surface fastener 10 which is the same as the form of the second engagement element 13 shown in FIG. 1, but is different from the form of the first engagement element 12 formed on the back surface of the flat base material 11. According to this example, the entire first engagement element 12 is substantially Y in side view.
It has a shape in which a substantially V-shaped cut reaching the support portion 12a is cut at a boundary portion of the engaging head portion 12b extending forward and backward.

Further, in the first engaging element 12, the top of the engaging head 12b is a flat surface 12b-1, and the bulging portion 12b bulging from the top on the same flat surface in the left-right direction.
-2. The details of the structure, operation, effects and manufacturing method are disclosed in U.S. Pat. No. 5,781,969, and refer to the specification if necessary.

As described above, according to the present embodiment, a double-sided molded surface fastener having the first and second engaging elements 12 and 13 in various forms can be molded. As described above, the thickness of the second engaging element 13 formed by this embodiment device can be changed in the forming direction by changing the vibration speed of the vertical vibration member 106. FIG.
In the second engagement element 13 shown in FIG. 5, the second engagement element 13 when the vibration speed of the vertical vibration member 106 is reduced
Is shown. As can be understood from FIG.
As compared with the second engagement element 13 shown in FIG. 5, the second engagement element 13 is thicker in the molding direction.

FIGS. 41 and 42 show an embodiment of the double-sided molded surface fastener 10 when the vibration speed of the vertical vibration member 106 is changed using the apparatus of the embodiment.
FIG. 41 shows a double-sided molded surface fastener 10 obtained by alternately changing the vibration speed for each molding row of the second engagement element 13.
The double-sided molded surface fastener 10 shown in FIG. 42 is obtained by randomly changing the vibration speed.

FIG. 43 shows a first modification of the apparatus of the embodiment. In this modification, the extrusion nozzle 105 having the same structure as the above-described embodiment, a pair of front and rear first and second vibration members 107 and 108 disposed on the front surface thereof, , 108 via link 104d, 104d ', respectively, and vibrating means 104, 104' for raising and lowering the first and second vertical vibration members 107, 108. Other configurations are the same as those of the first embodiment.

According to the illustrated example, the total number of the second engagement element forming openings 105a of the extrusion nozzle 105 is six.
This is one in which the number of the second engagement element forming openings 105a is set to six for easy understanding, and can actually be set arbitrarily. On the other hand, the first vertical vibration member 10
7 and the second vertical vibration member 108 are each made of a comb-shaped metal plate having two vertically long rectangular slits 107a and 108a.

The rectangular slit 107a of the first vertical vibration member 107 and the rectangular slit 108a of the second vertical vibration member 108 basically have the same slit width and the same arrangement interval. However, the first vertical vibration member 107 and the second vertical vibration member 108 are different in the overall form. That is, the first vertical vibration member 107 has a flat surface having substantially the same thickness from the upper edge to the center, and the lower edge is formed in a wedge-shaped cross section as in the above-described embodiment. The slit height h1 of the shape slit 107a reaches the portion having the same thickness.

On the other hand, in the second vertical vibration member 108, the same thick portion 108b and the wedge cross-section portion 108c are formed in a stepwise manner via a connecting portion 108d projecting from the lower end of the same thick portion to the rear side in the molding direction. It is connected to. The rectangular slit 108a of the second vertical vibration member 108 is formed from the tip of the wedge section 108c to the upper end of the connecting portion 108d, and the height h2 of the second vertical vibration member 108
07 into the rectangular slit 107a, and move up and down inside the slit to form the second engagement element forming opening 105a.
The height is set to be high enough to form the second engagement element 13 by the molten resin extruded from the second engagement element 13.

The rectangular slits 107a of the first vertical vibration member 107 and the second vertical vibration member 108,
The formation position of the rectangular slit 107 a
a, 108a so that the rectangular slits 107a, 108a do not overlap each other.
08 is displaced to one of the left and right sides. The disposition positions of the first vertical vibration member 107 and the second vertical vibration member 108 are shifted by the pitch of each of the rectangular slits 107a and 108a.
8 is fitted into the rectangular slit 107a from the front side of the first vertical vibration member 107.

First and second vertical vibration members 107 and 10
8 is the first and second vertical vibration members 107 and 108 connected via links 104d and 104d ', respectively.
By operating the vibrating means 104 and 104 ′ for raising and lowering the nozzle, the first vertical vibration member 107 and the second vertical vibration member 108 are brought into close contact with the second engagement element forming opening 105 a of the extrusion nozzle 105 and are raised and lowered. At this time, the first and second vertical vibrating members 107 and 108 are alternately driven such that after the vertical motion of one of the vertical vibrating members is completed, the other vertical vibrating member is vertically moved. For example, when the first vertical vibration member 107 reaches the lower limit position,
The wedge cross section 108c of the second vertical vibration member 108 starts descending inside the rectangular slit 107a of the first vertical vibration member 107.

In the illustrated example, the second nozzle 105
Of the engagement element forming openings 105a, three rows of the second resin are extruded from the odd numbered second engagement element forming openings 105a with the first vertical vibration member 107 from the left.
The engaging elements 13 are formed, and the second vertical vibrating member 108 is pressed out of the even-numbered second engaging element forming openings 105a from the left with the molten resin extruded from the left through three rows of the second engaging elements 13.
Is molded. The forming mechanism is the same as the forming mechanism according to the above-described embodiment. The double-sided molded surface fastener 10 to be molded is formed by integrally molding a large number of second engaging elements 13 arranged in a staggered manner on the surface of the flat substrate 11 as shown in FIG. The form of each second engagement element 13 according to this embodiment is the same as the form of the engagement element shown in FIG.

FIG. 44 shows a further modification of the apparatus of the above-mentioned embodiment shown in FIG. 29, and a double-sided molded surface fastener having the second engagement elements 13 arranged in a staggered manner is also provided by this modification. Molded. In the modified device,
The second engaging element forming opening 10 of the extrusion nozzle 105 '
5a ', the vibration means 104' for raising and lowering the first vertical vibration member 107 'and the second vertical vibration member 108'
This is different from the above-mentioned modified example device. The configuration of the other members is substantially the same as that of the modified example.

The extrusion nozzle 105 'has an extrusion port equivalent to the above-mentioned extrusion port in the above-described modified apparatus, but a plurality of (six in the illustrated example) formed in the extrusion port are formed by the second engagement element molding. The height of the second, fourth, and sixth second engagement element forming openings 105a 'from the left of the opening 105a' is changed, and a thickness equal to the thickness of the first vertical vibration member 107 'is provided. It only protrudes forward. The first vertical vibration member 107 ′ has a lower edge formed with two rectangular slits 107 a ′ that are slidably fitted to the side surface of the protruding second engagement element forming opening 105 a ′ from above. The portion is made of a comb-shaped metal plate having a wedge-shaped cross section,
The lower edge of the vertical vibrating member 108 'also has a left and right cross-sectional wedge-shaped portion 10 disposed opposite to the rectangular slit 107a'.
8c 'and a rectangular slit 108a' formed therebetween.
And a metal plate having: And the vibration means 10
4 'is designed to be able to move up and down a long distance.

In order to form the double-sided molded surface fastener 10 using the modified apparatus having such a configuration, the first
The above two rectangular slits 10 of the vertical vibration member 107 '
7a ′ is fitted from above while slidingly contacting the left and right side surfaces of the second engaging element forming opening 105a ′ projecting from the front surface of the extrusion nozzle 121, and the second vertical vibration member 10
The wedge-shaped section 108c 'of 8' is disposed so as to be in sliding contact with the front surface of the second engaging element forming opening 105a '. The first and second vertical vibration members 107 ', 10'
The first engaging element 12 is provided on the rear surface of the first engaging element 8 'by alternately repeating the ascending and descending operation by the vibrating means 104 and 104'.
A large number of second engaging elements 13 having different heights and arranged in a zigzag pattern are formed and integrated on the surface of the plate-shaped base material 11 obtained by integrally forming the double-sided molded surface fastener 10.

FIG. 46 shows a further embodiment of the present invention. This apparatus differs from the first embodiment shown in FIGS. 3 and 4 in the form of a first engaging element molding cavity 112 'formed on the peripheral surface of a die wheel 111. Is different from the above-described embodiment, and a heating device 114 is provided immediately below the pickup roller 113.
Is arranged. Other configurations remain substantially unchanged.

That is, the first engaging element forming cavity 112 'formed on the peripheral surface of the die wheel 111 in the illustrated embodiment is not a hook shape or a palm shape curved inside the die wheel as described above. A large number of the first engaging element molding cavities 112 'arranged in the circumferential direction and the axial direction merely extend linearly toward the axis.

Therefore, the first engagement element 12 formed by the die wheel 111 is at this point in time
Is merely a protruding piece protruding linearly on the back surface of the die wheel 1 by the take-up roller 113.
The first engagement element 12 that is pulled from the base plate 11 and protrudes from the rear surface of the flat
At the time of passing, the heating device 11 installed thereunder
4, the tip of the first engagement element 12 is heated to be in a molten state, and after being rounded into a sphere, is cooled and solidified. In this case, the final form of the first engagement element 12 has a so-called mushroom shape.

As can be understood from the above description, in the double-sided molded surface fastener according to the present invention, the first engagement element and the second engagement element are respectively continuous on the front and back surfaces of the flat substrate in a single step. Because of the integrated molding, it is possible to significantly improve productivity and reduce equipment space as compared with the conventional method and equipment. Therefore, the burden on equipment costs can be reduced.

In particular, the form of the second engagement element is a completely new form that cannot be formed by the conventional method, and the form can be changed in various ways. A suitable form can be set in accordance with the engagement / disengagement characteristics of the engagement element and the characteristics of the counterpart product to be engaged / disengaged. Further, the second engaging element is formed by extruding a large number of ribs having a cross section of the engaging element extending on the base material together with the base material as in the related art, and then forming the ribs along a predetermined length along the length direction. Compared with molded surface fasteners manufactured by cutting at the pitch of the following, then stretching the substrate and separating it into individual engagement elements, it has a superior touch feeling and has various dimensions on the same substrate Since the engagement elements can be mixed and formed, it is possible to secure a required engagement rate and engagement force even for a loop material which is an engagement partner in which loops having different sizes are mixed.

[Brief description of the drawings]

FIG. 1 is a partial side view of a double-sided molded surface fastener showing a representative embodiment of the present invention.

FIG. 2 is a top view of the double-sided molded surface fastener.

FIG. 3 is a perspective view of a main part of a molding device for a double-sided molded surface fastener showing the device of the first embodiment of the present invention.

FIG. 4 is a front view schematically showing, in a partial cross section, a double-sided molded surface fastener molding portion of the molding apparatus.

FIG. 5 is a cross-sectional view schematically illustrating a forming step by the forming apparatus.

FIG. 6 is a first step explanatory view of the forming principle of the formed surface fastener of the present invention.

FIG. 7 is an explanatory view of a second stage of the molding principle.

FIG. 8 is an explanatory view of a third stage of the molding principle.

FIG. 9 is an explanatory view of a fourth step of the molding principle.

FIG. 10 is an explanatory view of a fifth step of the molding principle.

FIG. 11 is an explanatory view of a sixth step of the molding principle.

FIG. 12 is an explanatory view of a seventh step of the molding principle.

FIG. 13 is a side view partially showing an embodiment of another double-sided molded surface fastener of the present invention.

FIG. 14 is a side view partially showing an embodiment of still another double-sided molded surface fastener of the present invention.

FIG. 15 is a top view partially showing an embodiment of still another double-sided molded surface fastener of the present invention.

FIG. 16 is a top view partially showing still another embodiment of the double-sided molded surface fastener of the present invention.

FIG. 17 is a front view, partially in section, of a double-sided molded surface fastener molding apparatus according to another embodiment of the present invention.

FIG. 18 is a perspective view schematically showing a main part of a double-sided molded surface fastener molding apparatus according to still another embodiment of the present invention.

FIG. 19 is a perspective view partially showing a typical embodiment of a double-sided molded surface fastener molded by the molding apparatus.

FIG. 20 is a top view of the same.

FIG. 21 is a first step explanatory view of the molding principle of the molded surface fastener having the embodiment of the present invention.

FIG. 22 is an explanatory view of a second step of the molding principle.

FIG. 23 is an explanatory view of a third step of the molding principle.

FIG. 24 is an explanatory view of a fourth step of the molding principle.

FIG. 25 is an explanatory diagram of a fifth step of the molding principle.

FIG. 26 is an explanatory view of a sixth step of the molding principle.

FIG. 27 is an explanatory diagram of a seventh step of the molding principle.

FIG. 28 is an explanatory diagram of an eighth step of the molding principle.

FIG. 29 is a perspective view schematically showing a main part of a double-sided molded surface fastener molding apparatus according to still another embodiment of the present invention.

FIG. 30 is a cross-sectional view illustrating a forming step of a double-sided molded surface fastener by the molding apparatus.

FIG. 31 is a first step explanatory view showing a forming principle of a double-sided formed surface fastener by the apparatus of the embodiment of the present invention.

FIG. 32 is an explanatory view of a second step of the molding principle.

FIG. 33 is an explanatory diagram of a third step of the molding principle.

FIG. 34 is an explanatory view of a fourth step of the molding principle.

FIG. 35 is a side view partially showing a typical example of a double-sided molded surface fastener formed by the molding apparatus.

FIG. 36 is a front view of the fastener.

FIG. 37 is a front view partially showing another example of a double-sided molded surface fastener formed by the molding apparatus.

FIG. 38 is a front view partially showing still another embodiment of the double-sided molded surface fastener molded by the molding apparatus.

FIG. 39 is a front view partially showing still another embodiment of a double-sided molded surface fastener molded by the molding apparatus.

FIG. 40 is a side view partially showing a modified example of the double-sided molded surface fastener.

FIG. 41 is a side view partially showing a further modified example of the double-sided molded surface fastener.

FIG. 42 is a side view partially showing a further modified example of the double-sided molded surface fastener.

FIG. 43 is a perspective view showing a main part of an apparatus according to still another embodiment of the present invention.

FIG. 44 is a perspective view showing a main part of the modified device.

FIG. 45 is a top view partially showing a double-sided molded surface fastener molded by the same device.

FIG. 46 is a cross-sectional view illustrating a step of forming a double-sided molded surface fastener by the apparatus according to still another embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 double-sided molded surface fastener 11 flat base material 12 first engagement element 12 a support 12 b engagement head 12 c reinforcing rib 13 second engagement element 13 a support 13 b engagement head 100 double-sided molded surface fastener forming apparatus 101 Second engaging element forming section 102 First extrusion nozzle 102a Sliding guide section 102b Slit-shaped guiding surface 102c Rail surface 102d Molten resin passage (second engaging element forming opening) 102d-1 Column forming opening 102d-2 head Part forming opening 102d 'Rectangular opening 103 Second extrusion nozzle 103d Rectangular opening 103d' Second engaging element forming opening 103d'-1 Column forming opening 103d'-2 Head forming part opening 104, 104 'Vibration means 104a Rotary drive motor 104b Rotating disk 104c Eccentric pin 104d, 104d 'Link 105, 105' Push Nozzle 105a, 105a 'Second engaging element forming opening 106 Vertical vibration member 107, 107' First vertical vibration member 108, 108 'Second vertical vibration member 107a, 108a, 107a', 108a 'Vertical rectangular slit 108b Same Thick portion 108c, 108c 'Wedge-shaped portion 108d Connecting portion 109 Controller 110 Extrusion die 111 Die wheel 112, 112' First engagement element molding cavity 113 Pickup roller 114 Heating device

Claims (24)

[Claims] 1. A molding device for a molding surface fastener for integrally molding a flat substrate (11) and a large number of engaging elements (12, 13) by continuous molding, wherein the peripheral surface is formed by an extrusion die of an extruder. (110), a die wheel (11)
1) a first extrusion nozzle (102) disposed at an end of the extrusion die (110) in the direction of rotation of the die wheel and having a first extrusion port extending in the width direction of the extrusion die (110); The first
A second extrusion nozzle (103) disposed in front of the extrusion nozzle (102) and having a second extrusion port. A plurality of first engagement element molding cavities (103) are provided on the peripheral surface of the die wheel (111). 112), and one of the first extrusion port and the second extrusion port has at least a plurality of vertically elongated rectangular openings (103d,
102d '), and the other extrusion port has the vertical rectangular opening (103
d, 102d ') and a plurality of second engaging element forming openings (102d, 103d') arranged corresponding to the first engaging element so that the corresponding openings alternately intersect with each other.
A molding device for a molding surface fastener, comprising a vibration means (104) for relatively vibrating the extrusion nozzle (102) and the second extrusion nozzle (103) in the width direction. 2. The first extrusion nozzle (102) has the second engagement element forming opening (102d), and the second extrusion nozzle (10)
3) has a vertically long rectangular opening (103d), the periphery of the vertically long rectangular opening (103d) is a tapered surface that gradually expands toward the extrusion side, and the second extrusion nozzle (103) is The molding device according to claim 1, wherein the molding device is connected to the vibration means (104). 3. The first extrusion nozzle (102) has the vertically elongated rectangular opening (102d '), and the second extrusion nozzle (103) has the second engagement element forming opening (103d'). And
The periphery of the second engaging element forming opening (103d ') is a tapered surface gradually expanding toward the pushing side, and the second pushing nozzle (103) is connected to the vibrating means (104). The molding apparatus according to claim 1. 4. A molding device (100) of a molding surface fastener for integrally molding a flat base material (11) and a large number of engaging elements by continuous molding, wherein the peripheral surface is formed by an extrusion die (110) of an extruder. ) And a die wheel (11)
1), an extrusion nozzle (105) arranged at an end of the extrusion die (110) in the die wheel rotation direction and having an extrusion port in a width direction of the extrusion die (110); and an extrusion nozzle (105). A vertical vibrating member (106 to 108) arranged on the front surface for vertically opening and closing the extrusion port, and a vibrating means (104) for vertically vibrating the vertical vibrating member (106 to 108); The peripheral surface of the wheel (111) has a large number of first engagement element molding cavities (112), and the extrusion ports are provided with a plurality of second engagement elements arranged at the same pitch in the width direction.
It has an engagement element forming opening (105a), and the vertical vibration members (106 to 108) are made of a flat plate material,
The molding device for a molding surface fastener, wherein the closing position of the second engagement element molding opening (105a) is a position where the thickness of the flat base material (11) is left. 5. The first and second comb-shaped first and second vertical members having openings (107a, 108a) formed so that they do not overlap each other in the lateral direction. The first and second vertical vibration members (1) are constituted by vibrating members (107, 108) such that the openings (107a, 108a) do not overlap.
5. The molding apparatus according to claim 4, wherein the extruding nozzles (07, 108) are arranged back and forth toward the extrusion port of the extrusion nozzle (105), and are alternately moved up and down by each vibration means. 6. The first vertically vibrating member (107) is formed of a flat plate, and the closing portion of the second vertically vibrating member (108) is formed of the first vertically vibrating member (108).
The first vertical vibrating member has a form in which it fits into the opening of the vertical vibrating member (107), and the vertical dimension of the opening of the first vertical vibrating member (107) is the length of the closed portion of the second vertical vibrating member (108) and the length thereof. 5. The molding apparatus according to claim 4, wherein the molding apparatus has a dimension equal to or greater than the sum of the elevation amounts. 7. An opening (105a) for molding the second engagement element adjacent to the extrusion opening is alternately arranged by a normal opening and a projecting opening, and an opening of the first vertical vibration member (107) is provided. Are fitted slidably up and down across the projecting engagement element forming opening, and the closing portion of the second vertical vibration member (108) moves up and down the front surface of the projecting engagement element forming opening (105a). 6. The molding apparatus according to claim 5, wherein said molding apparatus is slidably contacted with said molding apparatus. 8. The molding apparatus according to claim 1, wherein said vibrating means (104) has control means (109) for changing a vibration speed. 9. At least one of the plurality of second engaging element forming openings (102d, 103d ') arranged side by side is different from the height of the other second engaging element forming openings (102d, 103d'). The molding apparatus according to claim 1 or 4, wherein: 10. A molding apparatus according to claim 1, wherein said die wheel has cooling means. 11. The first extrusion nozzle (102) or the second extrusion nozzle (102).
The molding apparatus according to claim 1 or 4, wherein a gap between the extrusion nozzle (103) and the die wheel (111) is set to a gap substantially equal to a thickness of the base material (11), and is arranged to face each other. 12. The second engaging element forming opening (102d, 103).
5. The molding device according to claim 1, wherein d ') is substantially T-shaped. 13. The second engaging element forming opening (102d, 103).
5. The molding apparatus according to claim 1, wherein d ') is substantially Y-shaped. 14. The second engaging element forming opening (102d, 103).
5. The molding apparatus according to claim 1, wherein the tip of the head forming opening (102d-2, 103d'-2) in d ') is bent toward the peripheral surface of the die wheel. 15. A synthetic resin having a large number of first engagement elements (12) on one surface of a flat substrate (11) and a large number of second engagement elements (13) on the other surface. A molded surface fastener integrally molded from a material, wherein the first and second engagement elements (12, 13) are arranged on the flat base material (1).
The column (12a, 13a) standing on the surface of (1) and the column (12
a, 13a) extending from the distal end of the second engaging element (13), and the strut (13a) and the engaging head (13
b) extends at an intersection angle θ of 0 ° or more and less than 90 ° with respect to the molding direction, has a substantially parallelogram shape in plan view, and is disposed adjacent to the molding direction. (13) A molded surface fastener, wherein the molded surface fasteners have mirror symmetry with each other. 16. A method according to claim 16, further comprising the step of:
Thickness of the column (13a) of the engagement element (13) and the engagement head (13b)
The molding surface fastener according to claim 15, wherein a projection length of the molding surface fastener changes periodically in a molding direction. 17. A method according to claim 17, further comprising the step of:
Thickness of the column (13a) of the engagement element (13) and the engagement head (13b)
16. The molding surface fastener according to claim 15, wherein a protrusion length of the molding surface fastener randomly changes in a molding direction. 18. The molding surface according to claim 15, wherein the height of the second engagement elements (13) arranged adjacent to each other at right angles to the molding direction is different from the base (11) to the apex. fastener. 19. A synthetic resin having a large number of first engagement elements (12) on one surface of a flat substrate (11) and a large number of second engagement elements (13) on the other surface. A molded surface fastener (10) integrally molded from a material, wherein the first and second engaging elements (12, 13) are arranged on the flat base material (1);
The column (12a, 13a) standing on the surface of (1) and the column (12
a, 13a) having an engagement head (12b, 13b) extending from the tip of the second engagement element (13), the second engagement element (13) being in a direction orthogonal to the direction in which the engagement head (13b) protrudes. The thickness of the molded surface fastener is gradually increased from the top of the engaging head (13b) to the base end of the pillar (13a). 20. An engagement head (13b) of the second engagement element (13).
20. The molded surface fastener according to claim 19, wherein the direction in which the protrusions protrude is a direction orthogonal to the molding direction of the molded surface fastener. 21. A plurality of said second engagement elements are provided on said base material (11).
20. The molded surface fastener according to claim 19, wherein a plurality of rows are arranged in the molding direction, and the engaging elements (13) adjacent between the rows are arranged in a staggered manner. 22. A molded surface fastener according to claim 15, wherein a cross section of said second engagement element is substantially T-shaped. 23. The molded surface fastener according to claim 15, wherein a cross section of the second engagement element is substantially Y-shaped. 24. The molded surface fastener according to claim 15, wherein a tip of said second engaging head (13b) is bent toward a substrate surface.