CN112369765B

CN112369765B - Method for manufacturing mushroom head fastening tape

Info

Publication number: CN112369765B
Application number: CN202011049269.0A
Authority: CN
Inventors: 楼新涛
Original assignee: Hangzhou Nanfang Fastener Tape Co ltd
Current assignee: Jiangxi Nanfang Nylon Fastener Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2023-01-31
Anticipated expiration: 2040-09-29
Also published as: CN112369765A

Abstract

The invention discloses a mushroom head magic tape, which comprises a loop surface and a barb surface, wherein the barb surface comprises a barb substrate and barbs on the surface of the barb substrate, each barb comprises a barb column and a hooking head at the end part of the barb column, and the barb surface is formed into a plastic substrate by an extruder; then, calendering the plastic substrate, wherein the calender comprises a calendering roller, the calendering roller comprises a plurality of molding disks which are axially overlapped, and a molding groove is arranged on a splicing line between two adjacent molding disks, so that a semi-molding groove is formed at the edge of each molding disk; when the barbs are broken in the forming grooves, the forming disks are separated from each other, the forming grooves are divided into two open semi-forming grooves, the broken barbs stay in the semi-forming grooves on one side, then the barbs stay in the semi-forming grooves are taken out, and the forming disks are fixed again to form the calendering roller. The invention can improve the adhesive force of the sticky hasp and prolong the service life of the sticky hasp, and is convenient for manufacturing, processing and maintenance in the production process.

Description

Method for manufacturing mushroom head fastening tape

Technical Field

The invention relates to the technical field of sticky buckles, in particular to a manufacturing method of a mushroom head sticky buckle tape.

Background

Because of the advantages of convenient use and low price, the application range of the adhesive hasp is wider and wider, the existing adhesive hasp is generally composed of two thin sheet strips, a large number of fine 'circles' are arranged on the surface of one thin sheet strip and are commonly called 'circle loop surfaces', a large number of fine 'hooks' are arranged on the surface of the other thin sheet strip and are commonly called 'hook thorn surfaces', wherein the circles are composed of fine fibers, and the hooks are divided into single-side hooks and double-side hooks. When the two sheet strips are mutually attached and extruded, the hook stabs enter the circle and hook the circle, so that the two sheet strips are mutually adhered together. When the two strips need to be separated, the two strips can be separated from each other only by tearing one of the strips hard.

However, the existing adhesive hasp has the following defects: first, since the hook is very fine, after the hook-and-loop fastener is repeatedly adhered and separated for many times, the hook gradually loses its original elasticity and becomes straight, so that the adhesive force between the hook surface and the loop surface gradually decreases and fails. Secondly, the barbed surface is generally manufactured by the following process: the plastic raw material is formed into a plastic sheet through an extruder or a wire drawing machine, and then the plastic sheet which is still in a high-temperature softening state is subjected to calendering treatment by using a calender, so that a large number of hook thorns are formed on one side surface of a plastic sheet belt, and the thickness of the plastic sheet meets the design requirement. The calendering roller for calendering needs to process a large number of small forming grooves matched with the shapes of the barbs on the circumferential surface, so that the calendering roller is troublesome to process, particularly, once the formed barbs are broken and remain in the forming grooves, the normal operation of subsequent extension processing can be influenced, and the small barbs are difficult to take out of the forming grooves, so that the maintenance of the calendering roller in production is inconvenient.

Disclosure of Invention

The invention aims to provide a method for manufacturing a mushroom head magic tape, which can improve the adhesive force of a sticky hasp and prolong the service life of the sticky hasp, and is convenient to maintain in the manufacturing process and the production process.

In order to achieve the purpose, the invention adopts the following technical scheme:

the mushroom head hook and loop fastener manufacturing method comprises a loop surface and a hook surface, wherein the hook surface comprises a hook substrate and a hook arranged on one side surface of the hook substrate, the hook comprises a spike column integrally connected with the hook substrate and a hook head integrally formed at the end part of the spike column, the diameter of the hook head is gradually increased from the end part to the root part connected with the spike column, and the diameter of the root part of the hook head is larger than that of the spike column, so that a step is formed between the spike column and the hook head, and the manufacturing of the hook surface comprises the following steps:

a. forming a continuous sheet of plastic substrate with an extruder;

b. calendering the plastic substrate by using a calender, wherein the calender comprises a calendering roller with a plurality of forming grooves for forming barbs, the calendering roller comprises a connecting piece and a plurality of forming disks, the connecting piece enables the forming disks to be axially overlapped to form the calendering roller, the forming grooves are formed on a splicing line between every two adjacent forming disks and are uniformly arranged in the circumferential direction, and therefore semi-forming grooves are formed at the edges of the side faces of the forming disks;

c. when the barbs are broken in the forming grooves, the connecting piece is detached to separate the forming disks from each other, the forming grooves are divided into two open semi-forming grooves, the broken barbs stay in the semi-forming grooves on one side, then the barbs stay in the semi-forming grooves on one side conveniently can be taken out, then the forming disks are axially overlapped by the connecting piece to form the calendering roller, and the calendering processing of the plastic substrate is started again.

First, the hook thorn formed by the hook thorn surface of the invention comprises a thorn column connected with the hook thorn substrate and a hook head formed at the end of the thorn column, namely, the whole hook thorn forms a circumferential 'barb', so that when the hook thorn surface and the ring surface are jointed, the hook thorn on the hook thorn surface can be squeezed open and pricked into a circle on the ring surface, and the hook head at the end of the hook thorn can conveniently catch the circle, thereby the ring surface and the hook thorn surface are mutually adhered and lapped together. In particular, the existing hook thorn is a fine hook, so that the adhesive force between the hook thorn surface and the loop surface is the sum of the elastic forces of a plurality of hooks, and after the hook thorn is used for a certain time, the hook thorn is gradually straightened, and the elastic force is gradually reduced. The hook thorn of the application forms hook force by the hook head and the 'barb' of the ring, and is irrelevant to the elastic force of the hook thorn. That is, when the user needs to separate the hook surface from the loop surface, the hook head will push open the circle on the loop surface. In the process, the hook thorn basically does not deform, and the loops on the loop surface do not deform such as stretching and the like, but are separated from or close to each other. Therefore, even if the adhesive tape is used for many times, the adhesive force of the loop surface and the hook surface can be still maintained, thereby effectively prolonging the service life.

Secondly, the calendering roller for calendering the plastic substrate in the invention is formed by stacking a plurality of molding disks in the axial direction. Therefore, when the forming disks with different thicknesses are adopted, the line spacing between the forming grooves for forming the barbs can be conveniently adjusted, and the line spacing, specification and model of the barbs are further changed.

In particular, since the forming grooves are formed on the splicing line between two adjacent forming disks, an open semi-forming groove is formed at the edge of the side surface of each forming disk to facilitate the processing and manufacturing of the forming disk. When the barbs are broken in the forming grooves, the connecting pieces are only needed to be disassembled to enable the forming disks to be separated from each other, the forming grooves are divided into two open half forming grooves, the broken barbs stay in the half forming grooves on one side, the barbs stay in the half forming grooves can be conveniently taken out from the half forming grooves, then the forming disks are axially overlapped to form the calendering roller through the connecting pieces, the calendering processing of the plastic substrates can be restarted, and the maintenance of the calendering roller in use is greatly facilitated.

Preferably, the hooking head is provided with a conical deformation groove at the center of the end face far away from the barbed post, and in the step b, when the plastic substrate enters one side of the calendering roller, the calendering roller rolls the plastic substrate, so that the barbed post is formed in the forming groove; when the plastic substrate gradually leaves from the other side of the calendering roller, the hook thorn gradually separates from the forming groove, and at the moment, the hook head at the end part of the hook thorn gradually shrinks inwards and separates from the forming groove.

It is understood that the barbs of the barb surfaces are generally molded by a calendering process, and therefore barbs with large end portions and small root portions are prone to difficult release during release after calendering, and even cause the barbs to break in the forming grooves of the mold in severe cases. The invention is provided with a conical deformation groove at the center of the end surface of the hook head far away from the thorn column, thereby leading the hook head to be barrel-shaped. Thus, when the barb is rolled, cooled and solidified and then is released from the forming groove, the opened hook head can be radially shrunk and released from the forming groove, and the hook head is effectively prevented from being broken in the forming groove during demoulding. That is to say, the deformation recess makes the hook head have a deformation space, is favorable to the radial shrink of hook head and the drawing of patterns.

Preferably, the forming groove comprises a cylindrical section for forming the barbed columns and an outward expansion section for forming the hooking heads, an outward expansion embedding hole is formed in one end, far away from the cylindrical section, of the outward expansion section, an embedding piece is matched in the embedding hole, and a forming head for forming the deformation grooves is arranged at one end, close to the cylindrical section, of the embedding piece.

The molding groove is provided with the outward-expanding embedding hole at the end part of the outward-expanding section, so that a step is formed between the embedding hole and the outward-expanding section, and the insert matched in the embedding hole can be reliably positioned. The forming head for forming the conical deformed groove is formed on the insert, so that the insert is convenient to process and manufacture and can be conveniently embedded in the semi-forming groove of a piece of forming disc. When the molding disks are stacked together, the insert is held in place by the half-molding grooves of adjacent molding disks. When the molding disks are separated from each other, the insert can be conveniently taken out from the half-molding groove, so that the subsequent maintenance is facilitated.

Preferably, the calendering roller is prepared by adopting the following method: firstly, a plurality of forming disks with positioning round holes in the centers are machined, a plurality of connecting through holes uniformly arranged in the circumferential direction are arranged on each forming disk, a semi-forming groove is machined in the side edge of each forming disk through an electric spark discharge process, then the forming disks are mutually overlapped and leaned together, a fastening bolt penetrates through the connecting through holes which are mutually communicated, then a spring washer is sleeved and connected with a fastening nut in a threaded manner, the compression amount of the spring washer is 40% -60% of the maximum compression amount, a correction pull rod penetrates through the positioning round holes which are mutually communicated, a correction shell with two small ends and a large middle part is arranged on the correction pull rod, the maximum diameter of the correction shell is 1-2mm larger than that of each positioning round hole, a plurality of deformation long grooves which are distributed at equal intervals and extend along the axial direction are arranged in the circumferential direction of the correction shell, the correction pull rod is pulled, the correction shell is radially contracted under the extrusion of the positioning round holes, the forming disks are radially moved under the radial extrusion force of the correction shell, so that the forming disks are coaxially overlapped and the fastening nuts are screwed, the gaskets of the spring washers are enabled to reach the maximum compression amount, and a calendering roller is formed.

It can be understood that, because the fastening bolts for fixedly connecting the molding disks have a certain gap with the connecting through holes, when we stack several molding disks together, it is difficult to ensure complete concentricity, thereby causing errors in the shape and size of the molding groove. Therefore, the invention creatively fixes the molding discs by the fastening bolts initially, and at the moment, certain extrusion force is generated between the adjacent molding discs by the elasticity of the spring washer, so that certain friction force is formed. That is, the forming disks are substantially aligned with each other. Then a straightening pull rod provided with a straightening shell penetrates through the positioning round holes of the overlapped forming disks, and the straightening pull rod is pulled towards the other end. Because the maximum diameter of the correcting shell is 1-2mm larger than that of the positioning round hole, the small end of the correcting shell can conveniently enter the positioning round hole, the middle part of the correcting shell can be blocked by the positioning round hole and forms mutual extrusion, the correcting shell forms radial outward extrusion force on the forming disc, and the positioning round hole forms radial inward-contracting extrusion force on the correcting shell. At this time, the correcting shell is elastically deformed and radially inwardly contracted, and the width of a deformed elongated slot provided in the correcting shell is narrowed. On the contrary, when two adjacent molding disks have certain coaxiality deviation, a tiny step is formed at the splicing part of the positioning round holes. When the straightening shell passes through, the forming disk is moved to form a concentric shape. After the correction of the correction shell is finished, the fastening nuts are sequentially screwed down to enable the spring gasket to reach the maximum compression amount, so that the calendering roller can be formed, and at the moment, adjacent forming disks cannot move mutually. That is to say, the correction shell and the positioning circular hole can realize gapless fit, and the formable disks of the calendering roller are ensured to have extremely high coaxiality.

Preferably, an elastic body is filled in the correction case.

It will be appreciated that the elastomer may be formed from a material such as rubber to provide both radial support to the orthotic shell and to facilitate uniform radial inward deformation of the orthotic shell in the circumferential direction.

Therefore, the invention has the following beneficial effects: the adhesive force and the service life of the adhesive hasp can be improved, and the maintenance in the manufacturing process and the production process is convenient.

Drawings

Fig. 1 is a schematic view of a structure of a barbed surface.

FIG. 2 is a schematic view of a calender roll structure.

Fig. 3 is a schematic view of a structure of a molded disk.

Fig. 4 is another partial structure diagram of the barbed surface.

FIG. 5 is a partial schematic view of the calender rolls at the forming groove.

FIG. 6 is a schematic view of a state of processing of a calender roll.

In the figure: 1. the hook comprises a hook thorn surface 11, a hook thorn substrate 12, a hook thorn 121, a thorn column 122, a hook head 123, a deformation groove 2, a calendering roller 21, a forming groove 211, a semi-forming groove 212, a cylindrical section 213, an outward expanding section 214, an embedding hole 22, a forming disc 221, a positioning round hole 23, a connecting piece 231, a fastening bolt 232, a fastening nut 233, a spring washer 24, a connecting through hole 3, an embedding piece 31, a forming head 4, a correction pull rod 41, a correction shell 411 and a deformation long groove.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

A method for manufacturing mushroom head fastening tape comprises a loop surface (not shown in the figure) and a hook surface 1 shown in figure 1, wherein the hook surface is made of nylon and specifically comprises a hook substrate 11 and a hook 12 arranged on one side surface of the hook substrate, the hook comprises a puncture column 121 integrally connected with the hook substrate and a hook head 122 integrally formed at the end part of the puncture column, the diameter of the hook head is gradually increased from the end part to the root part connected with the puncture column, so that the diameter of the root part of the hook head is larger than that of the puncture column, and a step with a barb function is formed between the puncture column and the hook head, and the method for manufacturing the hook surface comprises the following steps:

a. extruding a continuous sheet-shaped plastic substrate by using an extruder, wherein the plastic substrate can be formed by drawing by using a wire drawing machine;

b. and (3) calendering the plastic substrate by using a calender, wherein the plastic substrate is in a higher-temperature softening state. The calender comprises a calendering roller, as shown in fig. 2 and 3, a plurality of forming grooves 21 for forming the barbs are arranged on the calendering roller 2, and it can be understood that the forming grooves are small in opening and large in inside. When the calendering roller rolls the softened plastic substrate, on one hand, the plastic substrate has uniform thickness, and on the other hand, partial material of the softened plastic substrate is extruded into the forming groove of the calendering roller, so that the barbs are formed. In addition, the calendering roller comprises a plurality of molding disks 22 and connecting pieces 23, the connecting pieces enable the molding disks to be axially overlapped and fixedly connected together to form the calendering roller, and the formed type grooves are formed on a splicing line between two adjacent molding disks and are uniformly arranged in the circumferential direction, so that semi-molding grooves 211 are formed at the edges of the side faces of the molding disks;

c. when the hook pricks are broken in the forming grooves, the connecting piece can be detached to enable the forming discs to be separated from each other, the forming grooves are divided into two open semi-forming grooves 211, the broken hook pricks stay in the semi-forming grooves on one side, then the hook pricks stay in the semi-forming grooves on one side can be conveniently taken out, then the forming discs are axially overlapped to form the calendering roller through the connecting piece, and the calendering processing of the plastic substrates is started again.

Because the barb comprises the barb column connected with the barb substrate and the hook head formed at the end part of the barb column, the whole barb forms circumferential 'barbs', and the hook head end part of the barb is small and the tail end is large. Thus, when the hook surface and the loop surface are jointed, the hook on the hook surface can be conveniently inserted into the loop on the loop surface, and the hook head at the end part of the hook can be conveniently hooked on the loop, so that the loop surface and the hook surface are mutually bonded and lapped together. In particular, the hook thorn of the application forms a hooking force by the hook head and the 'barb' of the ring, and is irrelevant to the elastic force of the hook thorn, so that the hook thorn surface can keep the adhesive force of the ring surface of the adhesive ring for a long time, thereby effectively prolonging the service life of the adhesive buckle.

It should be noted that when the forming discs with different thicknesses are adopted, the line spacing between the forming grooves for forming the barbs can be conveniently adjusted, and further, the line spacing, specification and model of the barbs are changed. In addition, since an extruder, a calender, etc. belong to the prior art, they will not be described in detail herein, and a horizontal calendering platform is provided below the calendering roller to cooperate with the calendering roller to calender the plastic substrate.

In order to facilitate the hook head to be separated from the forming groove, as shown in fig. 4, a conical deformation groove 123 is arranged at the center of the end face of the hook head far away from the stabbing post, so that the hook head is in a horn mouth shape. Thus, in the step b, when the plastic substrate enters one side of the calendering roller, the calendering roller rolls the plastic substrate, so that the barbs are formed in the forming grooves; when the plastic substrate leaves from the other side of the calendering roller gradually, the hook thorn breaks away from the forming groove gradually, and at the moment, the hook head with the opened hook thorn end is extruded by the smaller opening of the forming groove to be radially reduced, so that the hook head can be conveniently separated from the forming groove, and the hook head is effectively reduced or even prevented from being broken in the forming groove when being demoulded.

Preferably, as shown in fig. 3 and 5, the opening of the forming groove is a thin cylindrical section 212 for forming the barbed post, the inside of the forming groove is an outward-expanding section 213 for forming the hooking head, and an inward end of the outward-expanding section, which is far away from the cylindrical section, is provided with an outward-expanding inlaid hole 214, so that a step is formed between the inlaid hole and the outward-expanding section. Inlay downthehole adapted insert 3, the insert is equipped with the conical shaping head 31 that is used for the shaping to warp the recess near cylinder section one end, and the adaptation can rely on the step to reliably fix a position inlaying downthehole insert.

It will be appreciated that the insert is held in place by the half-grooves of adjacent forming discs when the forming discs are stacked on top of each other to form the calender roll. When the molding disks are separated from each other, the insert can be conveniently taken out from the half-molding groove, so that the subsequent maintenance is facilitated.

In order to ensure the coaxiality of the shaped disks when assembling the calender rolls, as shown in fig. 3 and 6, the calender rolls can be made by the following method: firstly, a plurality of forming disks with positioning round holes 221 in the centers are machined, a plurality of connecting through holes 24 evenly arranged in the circumferential direction are machined in the forming disks, semi-forming grooves are machined in the side edges of the forming disks through an electric spark discharge process, then the forming disks are mutually overlapped and abutted together, fastening bolts 231 penetrate through the mutually communicated connecting through holes and then are sleeved with spring washers 233, and fastening nuts 232 are connected in a threaded mode, at the moment, the forming disks are connected together to form a calendering roller, and the compression amount of the spring washers is 40% -60% of the maximum compression amount. That is, the adjacent forming disks are elastically pressed, and the pressing force and the friction force are determined by the elastic force of the spring washer. It will be appreciated that the fastening bolts, spring washers, and fastening nuts herein constitute the connecting members.

Then, a straightening pull rod 4 penetrates through the communicated positioning round holes, a straightening shell 41 with two small ends and a large middle part is arranged on the straightening pull rod, the maximum diameter of the middle part of the straightening shell is 1-2mm larger than that of the positioning round holes, and a plurality of deformation long grooves 411 which are distributed at equal intervals and extend along the axial direction are arranged in the circumferential direction of the straightening shell. The correction pull rod is pulled, the correction shell is extruded by the positioning round hole to radially contract, and the forming discs are radially moved by the radial extrusion force of the correction shell, so that the forming discs are coaxially overlapped. The fastening nut is then tightened to achieve maximum compression of the spring washer, thereby forming the calender roll.

When the forming groove is provided with the embedding hole and the embedding piece is embedded in the embedding hole, the embedding piece can be divided into two half embedding pieces for convenient assembly and positioning, then the half embedding pieces are embedded in the embedding hole of the forming groove, and the surface of the forming disc is smooth. When the forming discs are stacked together, they can still move relatively to realize coaxiality.

Preferably, the corrective shell is filled with an elastomer made of rubber to form a radial support for the corrective shell and to avoid local indentation of the corrective shell when compressed.

Claims

1. The utility model provides a mushroom head thread gluing area manufacturing method, the thread gluing area includes circle face and hook thorn face, the hook thorn face includes the hook thorn substrate, sets up the hook thorn at hook thorn substrate one side surface, the hook thorn includes the thorn post of being connected with hook thorn substrate an organic whole, the integrative hook head that forms at thorn post tip, the diameter of hook head is crescent by tip to the root of being connected thorn post to the diameter of hook head root is greater than the diameter of thorn post, thereby forms the step between thorn post and hook head, the hook head is equipped with conical deformation recess in the terminal surface central point that keeps away from thorn post, characterized by, the manufacturing of hook thorn face includes the following step:

a. forming a continuous sheet of plastic substrate with an extruder;

b. calendering the plastic substrate by using a calender, wherein the calender comprises a calendering roller with a plurality of forming grooves for forming barbs, the calendering roller comprises a connecting piece and a plurality of forming disks, the connecting piece enables the forming disks to be axially overlapped to form the calendering roller, the forming grooves are formed on a splicing line between every two adjacent forming disks and are uniformly arranged in the circumferential direction, so that semi-forming grooves are formed at the edges of the side surfaces of the forming disks, and when the plastic substrate enters one side of the calendering roller, the calendering roller rolls the plastic substrate, so that the barbs are formed in the forming grooves; when the plastic substrate gradually leaves from the other side of the calendering roller, the hook thorn gradually separates from the forming groove, and at the moment, the hook head at the end part of the hook thorn gradually retracts and is separated from the forming groove, and the calendering roller is manufactured by adopting the following method: firstly, processing a plurality of forming discs with positioning circular holes in the centers, arranging a plurality of connecting through holes which are uniformly arranged in the circumferential direction on each forming disc, processing a semi-forming groove on the side edge of each forming disc through an electric spark discharge process, then mutually stacking the forming discs together, penetrating fastening bolts through the mutually communicated connecting through holes, then sleeving spring washers, and connecting fastening nuts in a threaded manner, wherein the compression amount of each spring washer is 40% -60% of the maximum compression amount, penetrating correction pull rods through the mutually communicated positioning circular holes, arranging correction shells with small ends and large middle parts on the correction pull rods, wherein the maximum diameter of each correction shell is 1-2mm larger than that of each positioning circular hole, arranging a plurality of deformation long grooves which are distributed at equal intervals and extend along the axial direction on the circumferential direction of each correction shell, pulling the correction pull rods, enabling the correction shells to radially contract under the extrusion of the positioning circular holes, radially moving the forming discs under the radial extrusion force of the correction shells, thereby enabling the forming discs to coaxially stack, screwing the fastening nuts, enabling the spring washers to reach the maximum compression amount, thereby forming a calendering roller, and filling an elastic body in the correction shells;

2. The manufacturing method of the mushroom head magic tape according to claim 1, wherein the forming groove comprises a cylindrical section for forming the barbed post and an outward expanding section for forming the hooking head, an outward expanding embedding hole is arranged at one end of the outward expanding section far away from the cylindrical section, an embedding piece is matched in the embedding hole, and a forming head for forming the deformation groove is arranged at one end of the embedding piece near the cylindrical section.