CN211105753U

CN211105753U - Angle steel type insulating section bar preforming device

Info

Publication number: CN211105753U
Application number: CN201922073324.9U
Authority: CN
Inventors: 马长山; 袁鹏
Original assignee: Beijing Friend Composite Materials Co ltd
Current assignee: Beijing Friend Composite Materials Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-07-28
Anticipated expiration: 2029-11-26

Abstract

The utility model relates to an angle-bar type insulating profile performing device, which comprises a first positioning plate, a second positioning plate, a third positioning plate and a fourth positioning plate, wherein the surface of the first positioning plate is sequentially provided with a first felt-penetrating hole, a second felt-penetrating hole and a third felt-penetrating hole from top to bottom; the center of the plate surface of the fourth positioning plate is provided with an inverted V-shaped second through hole. The angle steel type insulating profile preforming device is simple in structure, convenient to install, disassemble and replace and convenient to process; can effectively prevent the glass felt and the glass fiber yarn from being damaged due to one-step forming, and is beneficial to improving the qualification rate of finished products.

Description

Angle steel type insulating section bar preforming device

Technical Field

The utility model relates to an insulating section bar of angle bar type is forming device in advance belongs to insulating goods and makes technical field.

Background

The angle steel type insulating section is an insulating section with the same shape as angle steel, and the angle steel is commonly called angle iron and is long steel with two sides perpendicular to each other to form an angle. At present, the production process of the angle steel type insulating section bar generally adopts a glass fiber reinforced plastic pultrusion machine, a traction mechanism freely discharges glass fiber yarns and glass felts from a creel and a felt frame respectively, so that the glass fiber yarns and the glass felts are soaked with glue solution through a glue tank, then enter a heating mould through a yarn plate, a felt sleeve and a positioning plate on a pultrusion tool frame, the mould is surrounded by the heating sleeve for heating, the glass yarns and the felts soaked with the glue solution are solidified and formed through an inner cavity of the mould, and are compressed by the traction mechanism to be led out to be the continuous angle steel type insulating section bar.

In the production process of the existing angle steel type insulating section, because a preforming device is not usually arranged between a positioning plate and a heating mould, the dislocation of a glass felt and a glass fiber yarn is easy to occur, the final finished section is easy to have the defects of woven appearance, rough surface and unstable size, the occurrence probability exceeds 5.5 percent, and the qualification rate of the finished product is seriously influenced; meanwhile, the glass mat and the glass fiber yarn are easy to damage due to one-step forming.

SUMMERY OF THE UTILITY MODEL

The utility model provides an insulating section bar preforming device of angle bar type to the not enough of prior art existence, concrete technical scheme as follows:

an angle steel type insulating profile performing device comprises a first positioning plate, a second positioning plate, a third positioning plate and a fourth positioning plate, wherein the second positioning plate is arranged in parallel with the first positioning plate, the third positioning plate is arranged in parallel with the first positioning plate, the fourth positioning plate is arranged in parallel with the first positioning plate, a strip-shaped first felt penetrating hole, a strip-shaped second felt penetrating hole and a strip-shaped third felt penetrating hole are sequentially arranged on the surface of the first positioning plate from top to bottom, two lines of first yarn penetrating hole groups are respectively arranged between the first felt penetrating hole and the second felt penetrating hole and between the second felt penetrating hole and the third felt penetrating hole, and each first yarn penetrating hole group consists of first yarn penetrating holes which are arranged in rows; the surface of the second positioning plate is sequentially provided with three inverted V-shaped fourth felt through holes from top to bottom, and two groups of second yarn through hole groups are arranged between every two adjacent fourth felt through holes; the surface of the third positioning plate is provided with two inverted V-shaped fifth felt through holes, and an inverted V-shaped first through hole is formed between the two fifth felt through holes; and an inverted V-shaped second through hole is formed in the center of the plate surface of the fourth positioning plate.

As an improvement of the above technical solution, a distance between the first felt penetrating hole and the second felt penetrating hole is equal to a distance between the second felt penetrating hole and the third felt penetrating hole, a length of the first felt penetrating hole is greater than a length of the third felt penetrating hole, and a length of the third felt penetrating hole is greater than a length of the second felt penetrating hole.

As an improvement of the technical scheme, the first yarn penetrating holes in the first yarn penetrating hole groups are arranged at equal intervals, and the first yarn penetrating holes in two adjacent rows of the first yarn penetrating hole groups are arranged in a staggered mode.

As the improvement of the technical scheme, the fourth felt penetrating hole comprises two strip hole sections I which are arranged in axial symmetry, the two strip hole sections I are communicated with each other, and the included angle between the two strip hole sections I is 140 degrees.

As an improvement of the above technical solution, the second thread hole group includes a plurality of second thread holes arranged in an inverted V shape, and the second thread holes are arranged in an obtuse angle structure with an included angle of 140 °.

As an improvement of the above technical scheme, the second yarn threading holes in the second yarn threading hole groups are arranged at equal intervals, and the second yarn threading holes in two adjacent groups of second yarn threading hole groups are arranged in a staggered manner.

As an improvement of the technical scheme, the fifth felt penetrating hole is formed by two long strip hole sections which are perpendicular to each other to form an angle, and the two long strip hole sections are communicated with each other; the first through hole is formed by two long strip hole sections III which are perpendicular to each other to form an angle shape, and the two long strip hole sections III are communicated with each other; the hole width of the strip hole section II is y, the hole width of the strip hole section III is x, and x is larger than 3 y.

As an improvement of the above technical solution, the second through hole is formed by two long-strip hole sections which are perpendicular to each other to form an angle shape, and the two long-strip hole sections are communicated with each other; the width of the long-strip hole section four is z, and z is x.

The angle steel type insulating section preforming device has simple structure and convenient installation, disassembly and replacement; the glass mat and the glass fiber yarns are preformed into an angle steel-shaped structure, and the glass mat and the glass fiber yarns are clear in layout and uniform in distribution in the preforming process and are convenient to process; meanwhile, the glass fiber felt and the glass fiber yarns can be effectively prevented from being damaged due to one-step forming, and the finished product qualification rate is improved.

Drawings

FIG. 1 is an internal schematic view of an angle steel type insulating profile preforming apparatus according to the present invention;

fig. 2 is a schematic structural view (in a top view) of the angle-bar type insulating profile preforming apparatus according to the present invention;

fig. 3 is a schematic structural view of the first positioning plate of the present invention;

fig. 4 is a schematic structural view of the second positioning plate of the present invention;

fig. 5 is a schematic structural view of a third positioning plate according to the present invention;

fig. 6 is a schematic structural view of a fourth positioning plate according to the present invention;

fig. 7 is a schematic structural view of a fourth felt through hole of the present invention;

fig. 8 is a schematic structural diagram of the second thread hole group according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 6, the angle steel type insulating profile preforming device sequentially comprises a first positioning plate 50, a second positioning plate 60 arranged in parallel with the first positioning plate 50, a third positioning plate 70 arranged in parallel with the first positioning plate 50, and a fourth positioning plate 80 arranged in parallel with the first positioning plate 50 according to the advancing direction of a felt or a yarn, wherein a horizontally arranged long strip-shaped first felt-penetrating hole 51, a horizontally arranged long strip-shaped second felt-penetrating hole 52, and a horizontally arranged long strip-shaped third felt-penetrating hole 53 are sequentially arranged on the plate surface of the first positioning plate 50 from top to bottom, two rows of first yarn-penetrating groups 55 are respectively arranged between the first felt-penetrating hole 51 and the second felt-penetrating hole 52 and between the second felt-penetrating hole 52 and the third felt-penetrating hole 53, and the first yarn-penetrating groups 55 are composed of first yarn-penetrating holes 551 arranged in rows; the surface of the second positioning plate 60 is sequentially provided with three inverted-V-shaped fourth felt penetrating holes 61 from top to bottom, and two groups of second yarn penetrating hole groups 62 in inverted-V-shaped structures are arranged between every two adjacent fourth felt penetrating holes 61; the plate surface of the third positioning plate 70 is provided with two inverted-V-shaped fifth felt through holes 71, and an inverted-V-shaped first through hole 72 is arranged between the two fifth felt through holes 71; the center of the plate surface of the fourth positioning plate 80 is provided with an inverted V-shaped second through hole 81.

The felt or yarn is glass fiber yarn or glass felt special for producing the angle steel type insulating section. As in fig. 1, 2, the angle steel type insulating section preforming device is installed at the front end of angle steel type insulating section special heating mold 10, and this angle steel type insulating section special heating mold 10 is current angle steel type insulating section production equipment commonly used, and this part is also not the utility model discloses the key of protection no longer gives unnecessary details. The dipped glass fiber yarns and the glass felts sequentially pass through the first positioning plate 50, the second positioning plate 60, the third positioning plate 70 and the fourth positioning plate 80 for pre-forming and finally enter the special heating die 10 for the angle steel type insulating section for heating and shaping.

As shown in fig. 1 and 2, the angle steel type insulating profile preforming device further includes a mounting mechanism for fixing the first positioning plate 50, the second positioning plate 60, the third positioning plate 70 and the fourth positioning plate 80, the mounting mechanism includes two pressing plates 20, two first screws 40, first nuts 41 adapted to the first screws 40, four second screws 31, and second nuts 32 adapted to the second screws 31, the length direction of the pressing plates 20 is perpendicular to the length of the first screws 40, first mounting holes for the first screws 40 to move are respectively formed at two ends of the pressing plates 20, and the two pressing plates 20 are fixedly connected through the first screws 40 and the first nuts 41; the length direction of the second screw 31 is vertical to that of the first screw 40, and the tail end of the second screw 31 is fixedly connected with the pressure plate 20; a second mounting hole 501 for the second screw 31 to pass through is formed in the edge of the first positioning plate 50, a third mounting hole 601 for the second screw 31 to pass through is formed in the edge of the second positioning plate 60, a fourth mounting hole 701 for the second screw 31 to pass through is formed in the edge of the third positioning plate 70, and a fifth mounting hole 801 for the second screw 31 to pass through is formed in the edge of the fourth positioning plate 80; one side of the first positioning plate 50 is provided with a first blocking pipe 33 located between the first positioning plate 50 and the second positioning plate 60, the second nut 32 is arranged on the other side of the first positioning plate 50, the second nut 32 is in threaded connection with the second screw rod 31, the first blocking pipe 33 is sleeved on the outside of the second screw rod 31, a second blocking pipe 34 is arranged between the second positioning plate 60 and the third positioning plate 70, the second blocking pipe 34 is sleeved on the outside of the second screw rod 31, a third blocking pipe 35 is arranged between the third positioning plate 70 and the fourth positioning plate 80, the third blocking pipe 35 is sleeved on the outside of the second screw rod 31, a fourth blocking pipe 36 is arranged between the fourth positioning plate 80 and the pressing plate 20, and the fourth blocking pipe 36 is sleeved on the outside of the second screw rod 31.

The method for fixing the mounting mechanism and the special heating die 10 for the angle steel type insulating section comprises the following steps:

firstly, placing two pressing plates 20 on the upper side and the lower side of the special heating mold 10 for the angle steel type insulating section respectively, then penetrating first screw rods 40 into first mounting holes respectively, finally connecting first nuts 41 on the upper end and the lower end of the first screw rods 40 in a threaded manner, and tightly pressing the pressing plates 20 by the first nuts 41, so that the two pressing plates 20 are clamped at the upper end and the lower end of the special heating mold 10 for the angle steel type insulating section finally.

Step two, as the second screw 31 is fixedly connected with the pressure plate 20, the screw connection or the welding fixation can be adopted; the fourth blocking pipe 36 is firstly sleeved outside the second screw rod 31, then the fifth mounting hole 801 in the fourth positioning plate 80 penetrates through the second screw rod 31, then the third blocking pipe 35 is sleeved outside the second screw rod 31, the fourth mounting hole 701 in the third positioning plate 70 penetrates through the second screw rod 31, then the second blocking pipe 34 is sleeved outside the second screw rod 31, the third mounting hole 601 in the second positioning plate 60 penetrates through the second screw rod 31, then the first blocking pipe 33 is sleeved outside the second screw rod 31, the second mounting hole 501 in the first positioning plate 50 penetrates through the second screw rod 31, and finally the second nut 32 is in threaded connection with the second screw rod 31 so that the second nut 32 abuts against the first positioning plate 50.

The cross-sectional area of the second installation hole 501 is smaller than the cross-sectional area of the periphery of the first baffle pipe 33, the cross-sectional area of the third installation hole 601 is smaller than the cross-sectional area of the periphery of the second baffle pipe 34, the cross-sectional area of the fourth installation hole 701 is smaller than the cross-sectional area of the periphery of the third baffle pipe 35, the cross-sectional area of the fifth installation hole 801 is smaller than the cross-sectional area of the periphery of the third baffle pipe 35, and the cross-sectional area of the fifth installation hole 801 is smaller than the cross-sectional area of the periphery of the fourth. This enables the first pipe stopper 33 to limit the distance between the first positioning plate 50 and the second positioning plate 60, the second pipe stopper 34 to limit the distance between the second positioning plate 60 and the third positioning plate 70, the third pipe stopper 35 to limit the distance between the third positioning plate 70 and the fourth positioning plate 80, and the fourth pipe stopper 36 to limit the distance between the fourth positioning plate 80 and the pressing plate 20, which also controls the distance between the fourth positioning plate 80 and the inlet end of the angle steel type insulating section special heating mold 10; finally, the following steps can be achieved: as shown in fig. 2, the distance between the first positioning plate 50 and the second positioning plate 60 is m, the distance between the second positioning plate 60 and the third positioning plate 70 is n, the distance between the third positioning plate 70 and the fourth positioning plate 80 is c, the distance between the fourth positioning plate 80 and the inlet end of the special heating die for a channel steel type insulating section 10 is d, and n > m > c ═ d needs to be satisfied. The reason why n, m, c, d are set according to the above relationship is as follows: because the dispersion degree of the first positioning plate 50 is the largest, the dispersion degree of the second positioning plate 60 is the second, the concentration degree of the third positioning plate 70 is the highest, the distance between the first positioning plate 50 and the second positioning plate 60 is prolonged, the distance between the second positioning plate 60 and the third positioning plate 70 is prolonged to the largest, the resistance change when the glass fiber yarns and the glass felt are tightened and bound is in gradient change in the process that the glass fiber yarns and the glass felt sequentially pass through the first positioning plate 50, the second positioning plate 60, the third positioning plate 70 and the fourth positioning plate 80, and the large fall is avoided, so that the stress of the glass fiber yarns and the glass felt is more uniform when the glass fiber yarns and the glass felt are tightened and bound, the forward process is smoother, and the probability of abrasion in the tightening and binding processes is effectively reduced. The utility model discloses in, glass fiber yarn and glass felt tighten up gradually and tie the process through the quartic at the preforming in-process, for one time or twice fashioned receipts, the process of restrainting gradually through the quartic can show probability and the degree of wear that reduces glass felt and glass fiber yarn emergence wearing and tearing, helps improving off-the-shelf qualification rate.

When the angle steel type insulating section is produced by the company, the glass felts are arranged into three layers and are arranged in an upper, middle and lower mode, and a plurality of glass fiber yarns are filled between every two adjacent layers of glass felts, so that the compressive strength and the tensile strength of the finished section can be obviously improved. Therefore, when the impregnated glass mats pass through the first positioning plate 50, the uppermost glass mat passes through the first through-mat holes 51 and the length of the first through-mat holes 51 matches the width of the glass mat, the middle glass mat passes through the second through-mat holes 52 and the length of the second through-mat holes 52 matches the width of the glass mat, the lowermost glass mat passes through the third through-mat holes 53 and the length of the third through-mat holes 53 matches the width of the glass mat, and the first through-mat holes 51, the second through-mat holes 52 and the third through-mat holes 53 exactly match the glass mats; the distance between the first felt penetrating holes 51 and the second felt penetrating holes 52 is equal to the distance between the second felt penetrating holes 52 and the third felt penetrating holes 53, the length of the first felt penetrating holes 51 is greater than that of the third felt penetrating holes 53, and the length of the third felt penetrating holes 53 is greater than that of the second felt penetrating holes 52. The equal spacing arrangement is beneficial to the uniform distribution of the glass felt, and the lengths of the first felt penetrating hole 51, the second felt penetrating hole 52 and the third felt penetrating hole 53 are determined by the production process.

Further, the first threading holes 551 in the first threading hole group 55 are arranged at equal intervals, and the first threading holes 551 in two adjacent rows of the first threading hole groups 55 are arranged in an interlaced manner, for example, the first threading holes 551 in the first row of the first threading hole group 55 and the first threading holes 551 in the second row of the first threading hole group 55 are arranged in an interlaced manner. The glass fiber yarns after gum dipping are mutually supplemented, and are dispersed more uniformly in the section. According to the process requirements of our company, the number of the first threading holes 551 in the first threading hole group 55 in the first row is 21, the number of the first threading holes 551 in the first threading hole group 55 in the second row is 20, the number of the first threading holes 551 in the first threading hole group 55 in the third row is 21, and the number of the first threading holes 551 in the first threading hole group 55 in the fourth row is 20.

That is, the first felt penetration hole 51, the second felt penetration hole 52, the third felt penetration hole 53 and the first yarn penetration hole 551 mainly function as a limit.

Glass mat and glass fiber yarn can continue to pass second locating plate 60 after passing first locating plate 50, and second locating plate 60 plays limiting displacement on the one hand, and simultaneously, second locating plate 60 can also carry out first step to glass mat and glass fiber yarn and receive, and the concrete principle is as follows:

when the glass mat passes through the fourth mat passing hole 61 in the shape of an inverted V, the glass mat is forcibly restricted to the inverted V. When the glass fiber yarn passes through the second perforation group 62 arranged in an inverted V shape as a whole, the entire glass fiber yarn layer is also forcibly restricted to the inverted V shape. As shown in fig. 7 and 8, the fourth felt-penetrating hole 61 includes two first long-strip hole sections 611 arranged in axial symmetry, the two first long-strip hole sections 611 are communicated with each other, and an included angle between the two first long-strip hole sections 611 is 140 °. The second perforation group 62 includes a plurality of second perforation 621 arranged in an inverted V-shape, and the second perforation 621 is arranged in an obtuse angle structure with an included angle of 140 °. In the process that the glass mat and the glass fiber yarns pass through the second positioning plate 60, the glass mat and the glass fiber yarns are mainly forcibly shaped into the inverted V-shaped cross section, so that the glass mat and the glass fiber yarns are conveniently shaped into the inverted V-shaped structure again in the follow-up process. The second yarn threading holes 621 in the second yarn threading hole groups 62 are arranged at equal intervals, and the second yarn threading holes 621 in two adjacent groups of second yarn threading hole groups 62 are arranged in a staggered manner.

After the glass mat and the glass fiber yarns pass through the second positioning plate 60, the glass mat and the glass fiber yarns can continuously pass through the third positioning plate 70, the third positioning plate 70 plays a limiting role on the one hand, and meanwhile, the third positioning plate 70 can further bundle the glass mat and the glass fiber yarns so that the glass mat and the glass fiber yarns are forced to be shaped into an inverted V-shaped structure. The inverted V-shaped structure is the cross section shape of the angle steel. As is well known, angle steel is a long strip section with two sides perpendicular to each other to form an angle shape; therefore, the first through hole 71, the first through hole 72, and the second through hole 81 can be said to be structures adapted to the shape of the angle iron.

The fifth felt through hole 71 is formed by two long strip hole sections II which are perpendicular to each other to form an angle shape, and the two long strip hole sections II are communicated with each other; the first through hole 72 is composed of two long strip hole sections III which are perpendicular to each other to form an angle shape, and the two long strip hole sections III are communicated with each other; the hole width of the strip hole section II is y, the hole width of the strip hole section III is x, and x is larger than 3 y.

The glass felt penetrating through the fourth felt penetrating hole 61 in the middle is mixed with glass fiber yarns on the upper side and the lower side of the glass felt, then intensively penetrates through the first through hole 72, and is forcibly limited to form an angle steel-shaped structure at the first through hole 72; the first perforations 72 are of a relatively large width to accommodate the passage of one layer of glass mat with all of the glass fiber strands.

The second through hole 81 is formed by two rectangular hole sections which are perpendicular to each other to form an angle, and the two rectangular hole sections are communicated with each other; the width of the long-strip hole section four is z, and z is x.

The glass mat and the glass fiber yarns can continuously pass through the fourth positioning plate 80 after passing through the third positioning plate 70, the fourth positioning plate 80 plays a limiting role on the one hand, and meanwhile, the fourth positioning plate 80 can also carry out final bundling on the glass mat and the glass fiber yarns so that the glass mat and the glass fiber yarns are thoroughly shaped into an angle steel-shaped structure. The first and second through

holes

71 and 81 are through holes through which the glass mat and the glass fiber yarn are commonly passed. The hole width of the second through hole 81 is equal to the hole width of the first through hole 72, which is beneficial for the glass mat and the glass fiber yarns to be completely shaped into an angle steel-shaped structure at the second through hole 81, and the glass mat and the glass fiber yarns at the second through hole 81 can be extruded more compactly, so that the glass mat and the glass fiber yarns can be favorably and subsequently enter the internal hot-press molding of the special heating mold 10 for the angle steel-type insulating section.

In the above embodiment, the glass mat and the glass fiber yarn are limited and positioned after passing through the first positioning plate 50; the glass mat is firstly extruded into an inverted V shape by the second positioning plate 60, and the glass fiber yarn layer is firstly extruded into an inverted V shape; the glass fiber mat and the glass fiber yarns are extruded into a pre-forming structure with uniform and compact structure distribution before entering the special heating die 10 for the angle steel type insulating section, so that the glass fiber mat and the glass fiber yarns can conveniently enter the special heating die 10 for the angle steel type insulating section, the abrasion between the glass fiber mat and the glass fiber yarns and the special heating die 10 for the angle steel type insulating section is small, the glass fiber mat and the glass fiber yarns can be ensured to be small in abrasion, uniform in distribution and complete in structure in the process of bundling and pre-forming, the manufactured angle steel type insulating section is uniform in texture, and the mechanical property of the manufactured angle steel type insulating section is improved; in addition, first locating plate 50, second locating plate 60, third locating plate 70 and fourth locating plate 80 all have the effect of location to can prevent effectively that glass felt and glass fiber yarn from taking place the dislocation, just also effectively reduce the finished product and weave the defect that shows, the surface is coarse, the size is unstable, is showing the qualification rate that improves the finished product. The probability of defects of weaving appearance, rough surface, unstable size and the like of a finished product is not more than 1.3 percent, the qualification rate of the finished product is obviously improved, and the finished product has smooth surface, stable size, high mechanical strength and good quality.

The angle steel type insulating profile preforming device is simple in structure and convenient to install, disassemble and replace; the glass mat and the glass fiber yarns are preformed by four groups of positioning plates (a first positioning plate 50, a second positioning plate 60, a third positioning plate 70 and a fourth positioning plate 80) for performing, and the glass mat and the glass fiber yarns are separated, so that the glass mat and the glass fiber yarns can be distributed and distributed clearly, and the processing is convenient; meanwhile, the damage of the glass felt and the glass fiber yarns caused by one-step forming can be effectively prevented.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an angle steel type insulating section bar is forming device in advance which characterized in that: the novel yarn guide plate comprises a first positioning plate (50), a second positioning plate (60) which is parallel to the first positioning plate (50), a third positioning plate (70) which is parallel to the first positioning plate (50), and a fourth positioning plate (80) which is parallel to the first positioning plate (50), wherein a strip-shaped first felt penetrating hole (51), a strip-shaped second felt penetrating hole (52) and a strip-shaped third felt penetrating hole (53) are sequentially arranged on the surface of the first positioning plate (50) from top to bottom, two rows of first yarn penetrating groups (55) are respectively arranged between the first felt penetrating hole (51) and the second felt penetrating hole (52) and between the second felt penetrating hole (52) and the third felt penetrating hole (53), and the first yarn penetrating groups (55) are composed of first yarn penetrating holes (551) which are arranged in a row; the surface of the second positioning plate (60) is sequentially provided with three inverted V-shaped fourth felt through holes (61) from top to bottom, and two groups of second yarn through hole groups (62) are arranged between every two adjacent fourth felt through holes (61); the plate surface of the third positioning plate (70) is provided with two inverted V-shaped fifth felt penetrating holes (71), and an inverted V-shaped first through hole (72) is arranged between the two fifth felt penetrating holes (71); and an inverted V-shaped second through hole (81) is formed in the center of the plate surface of the fourth positioning plate (80).

2. The angle iron type insulating profile preforming apparatus as claimed in claim 1, wherein: the distance between the first felt penetrating holes (51) and the second felt penetrating holes (52) is equal to the distance between the second felt penetrating holes (52) and the third felt penetrating holes (53), the length of the first felt penetrating holes (51) is larger than that of the third felt penetrating holes (53), and the length of the third felt penetrating holes (53) is larger than that of the second felt penetrating holes (52).

3. The angle iron type insulating profile preforming apparatus as claimed in claim 1, wherein: the first yarn penetrating holes (551) in the first yarn penetrating hole groups (55) are arranged at equal intervals, and the first yarn penetrating holes (551) in two adjacent rows of the first yarn penetrating hole groups (55) are arranged in a staggered mode.

4. The angle iron type insulating profile preforming apparatus as claimed in claim 1, wherein: the fourth felt penetrating hole (61) comprises two strip hole sections I (611) which are arranged in axial symmetry, the two strip hole sections I (611) are communicated with each other, and an included angle between the two strip hole sections I (611) is 140 degrees.

5. The angle iron type insulating profile preforming apparatus as claimed in claim 1, wherein: the second yarn threading hole group (62) comprises a plurality of second yarn threading holes (621) arranged in an inverted V shape, and the second yarn threading holes (621) are arranged in an obtuse angle structure with an included angle of 140 degrees.

6. The angle iron type insulating profile preforming apparatus according to claim 5, wherein: the second yarn threading holes (621) in the second yarn threading hole groups (62) are arranged at equal intervals, and the second yarn threading holes (621) in two adjacent groups of the second yarn threading hole groups (62) are arranged in a staggered manner.

7. The angle iron type insulating profile preforming apparatus as claimed in claim 1, wherein: the fifth felt penetrating hole (71) is formed by two long strip hole sections II which are perpendicular to each other to form an angle shape, and the two long strip hole sections II are communicated with each other; the first through hole (72) is formed by two long strip hole sections III which are perpendicular to each other to form an angle shape, and the two long strip hole sections III are communicated with each other; the hole width of the strip hole section II is y, the hole width of the strip hole section III is x, and x is larger than 3 y.

8. The angle iron type insulating profile preforming apparatus according to claim 7, wherein: the second through hole (81) is formed by two long strip hole sections which are perpendicular to each other to form an angle, and the two long strip hole sections are communicated with each other; the width of the long-strip hole section four is z, and z is x.