CN114043653A

CN114043653A - Flat vulcanizing machine for molding oversized sealing ring and machining method

Info

Publication number: CN114043653A
Application number: CN202111371754.4A
Authority: CN
Inventors: 朱少玉
Original assignee: Lujiang County Fengyuan Rubber Seals Co ltd
Current assignee: Lujiang County Fengyuan Rubber Seals Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-02-15

Abstract

The invention discloses a vulcanizing press for molding an oversized sealing ring and a processing method thereof. Because the die plate group is partially reserved outside, the temperature of the part cannot reach the normal vulcanization temperature, the temperature is enough to melt the rubber strip and perform primary molding under the action of the die groove, but the rubber strip is not vulcanized, and then the unvulcanized part is melted again and vulcanized to complete butt joint to form a complete sealing ring.

Description

Flat vulcanizing machine for molding oversized sealing ring and machining method

Technical Field

The invention belongs to the technical field of machining of sealing rings, and particularly relates to a flat vulcanizing machine for molding an oversized sealing ring and a machining method.

Background

The application of the O-shaped sealing ring in the mechanical industry is very popular, and the O-shaped sealing ring is the most conventional and effective sealing means for realizing mechanical sealing.

Most of the existing O-shaped sealing rings are molded by compression, an upper template and a lower template are adopted, the joint surfaces of the two modules are arranged on the connecting center of two circle centers of the cross section of the O-shaped sealing ring, the two templates are positioned by positioning pins, solid raw materials which are prepared in advance are placed on the lower template, and the O-shaped sealing ring is molded by vulcanization after die assembly. A plurality of mould grooves are formed in a single mould, the sealing ring is in an integral shape after being formed, and then the sealing ring is separated from redundant edges by a side-dismantling centrifugal machine.

The existing ultra-large sealing ring, such as the sealing ring with the caliber of 1m or more, needs a larger die plate for matching, and needs to increase a hot pressing plate and a special matching vulcanizing machine for operation, so that the cost is very high.

Therefore, the invention mainly aims at the problem that the cost for producing the large-specification sealing ring is huge due to high investment of the existing production equipment for the large-specification sealing ring.

Disclosure of Invention

The invention aims to provide a vulcanizing press for molding a sealing ring with an oversized specification and a processing method, and mainly aims to solve the problem that the cost for producing the sealing ring with the oversized specification is huge due to high investment of existing production equipment for the sealing ring with the oversized specification.

In order to solve the technical problems, the invention is realized by the following technical scheme:

a vulcanizing press for molding an oversized seal ring comprises a base, wherein a supporting block is arranged right above the base, the base and the supporting block are supported through corresponding supporting columns, a lower hot pressing plate is arranged on the upper side of the base, an upper hot pressing plate corresponding to the lower hot pressing plate is arranged on the lower side of the supporting block, and a hydraulic device for driving the lower hot pressing plate to move upwards is arranged on the base;

a die plate group is arranged on the upper side of the lower hot pressing plate, the die plate group comprises an upper die plate and a lower die plate, four fifths of the die plate group are positioned at the overlapped part between the lower hot pressing plate and the upper hot pressing plate, and the other one fifth of the die plate group is used for a non-vulcanized part;

the upper die plate and the lower die plate are correspondingly provided with a U-shaped die groove, the die grooves are multiple and are mutually sleeved, and the notch of the die groove is positioned on one side of the non-vulcanization part.

Further, the formula is opened for the upset of side direction flat push to mould board group, the hot pressboard avris is provided with the pneumatic cylinder that the drive bed die board removed down, the output of pneumatic cylinder is the hydraulic stem, the bed die board corresponds the convertible articulated of one side of pneumatic cylinder with last mould board, the both sides that the bed die board corresponds mould board group moving direction have the slide down, the gyro wheel is all installed to the avris that goes up the mould board and corresponds the slide, the backplate is installed and is supplied the rolling race of gyro wheel, the race is L shape, and the turn department arcuation that the race corresponds passes through.

Further, a transition roller is arranged between the extension parts corresponding to the slide ways, a roller shaft is arranged in the center of the transition roller, and the end part of the roller shaft is in rotating fit with the slide ways.

Furthermore, the hydraulic rod is hinged to the connecting end of the lower die plate, a hinge seat is arranged at the position, corresponding to the hinge position, of the lower die plate, and the hydraulic rod is provided with a cross hole corresponding to the hinge seat.

Further, the position of the lower hot pressing plate corresponding to the support column is provided with a sliding sleeve for sleeving the support column.

Furthermore, cutter grooves are formed in the side edges of the mold groove, and the sections of the cutter grooves are V-shaped.

Furthermore, the upper die plate is provided with a limiting block, and a limiting groove is formed in the position, corresponding to the limiting block, of the lower die plate.

A processing method of an oversized seal ring, which adopts a flat vulcanizing machine for molding the oversized seal ring,

(1) calculating the length of the sealing ring, preparing a raw rubber strip longer than the perimeter of the sealing ring, putting the raw rubber strip into a mold groove corresponding to the mold plate group, and extending the end part of the raw rubber strip out of a notch;

(2) starting a hydraulic cylinder to move the die plate group into the lower hot pressing plate, reserving the die plate group outside by controlling the hydraulic cylinder, driving the lower hot pressing plate to move towards the upper hot pressing plate until the die plate group is overlapped, and starting hot pressing;

(3) after hot pressing is finished, the vulcanized raw rubber strips are taken out through reverse flow operation in the step (2), the parts of the rubber strips, which correspond to the extending and reserving parts of the die plate set, are formed but not vulcanized, and redundant raw rubber materials are cut at the positions of the rubber strips, which correspond to the notches of the die grooves, and are in a strip shape at the moment;

(4) and aligning the end part of the strip-shaped sealing ring, putting the end part of the strip-shaped sealing ring into the die groove again, positioning the end part of the sealing ring at a hot-pressing vulcanization position, repeating the hot-pressing operation, melting the end part of the sealing ring, vulcanizing and butting the end part of the sealing ring, and finishing the preparation of the sealing ring.

The invention has the following beneficial effects:

because the mold plate group is partially reserved outside, the temperature of the part cannot reach the normal vulcanization temperature which is 160-180 ℃, but the temperature of the part is enough to melt the rubber strip and perform primary molding under the action of the mold groove, but the molded unvulcanized part is placed into a high-temperature vulcanization area without vulcanization, the end parts of the molded unvulcanized part are butted, and then the unvulcanized part is melted again and vulcanized to complete the butting, so that the complete sealing ring is formed. Under the state of not enlarging the size of the mould plate and the flat vulcanizing machine, the sealing ring with large specification can be normally produced, and the cost on equipment is solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used for describing the embodiments are briefly introduced below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1: the structure of the invention.

FIG. 2: the structure of the invention.

FIG. 3: the structure of the invention.

FIG. 4: the structure diagram of the die plate group in the open state.

FIG. 5: the invention relates to a structure diagram of a die plate group.

FIG. 6: the invention relates to a structure diagram of a die plate group.

FIG. 7: the invention relates to a structure diagram of a die plate group in a superposition state.

In the drawings, the components represented by the respective reference numerals are listed below:

the die comprises a base 1, a supporting block 2, a supporting column 12, an upper die plate 3, a lower die plate 4, a lower hot press plate 11, an upper hot press plate 21, a hydraulic device 13, a die groove 41, a hydraulic cylinder 6, a hydraulic rod 61, a slideway 5, a guard plate 51, a roller 30, a wheel groove 52, a transition roller 53, a roller shaft 54, a hinge seat 40, a sliding sleeve 14, a cutter groove 42, a limiting block 31 and a limiting groove 43.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

In the present invention, it is to be understood that: the terms "open," "upper," "lower," "thickness," "top," "center," "length," "inner," "peripheral," and the like are used herein to indicate an orientation or positional relationship, merely to facilitate describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced components must have a particular orientation.

As shown in fig. 1-4: a vulcanizing press for molding an oversized seal ring comprises a base 1, wherein a supporting block 2 is installed right above the base 1, the base and the supporting block correspond to each other vertically and are square, the base 1 and the supporting block 2 are supported by corresponding supporting columns 12, the supporting columns are located at four corners of the base corresponding to the supporting blocks, a lower hot pressing plate 11 is installed on the upper side of the base 1, an upper hot pressing plate 21 corresponding to the lower hot pressing plate 21 is installed on the lower side of the supporting block 2, and a hydraulic device 13 for driving the lower hot pressing plate 11 to move upwards is installed on the base 1; the hydraulic device is positioned in the center of the base, and the output end drives the lower hot pressing plate to move towards the upper hot pressing plate.

A die plate group is arranged on the upper side of the lower hot pressing plate 11, the die plate group comprises an upper die plate 3 and a lower die plate 4, four fifths of the die plate group are positioned at the overlapped part between the lower hot pressing plate and the upper hot pressing plate, and the other one fifth of the die plate group is used for a non-vulcanized part; the non-vulcanized part is the part of the die plate group outside the superposed surface of the upper hot pressing plate and the lower hot pressing plate, and one fifth is an approximate value, so long as the effect of the invention can be achieved by highlighting one part.

Go up mould board 3 and lower mould board 4 and correspond and offer the mould groove 41 that is the U type, mould groove 41 is a plurality of and cup joint each other, even equidistance, the notch in mould groove 41 is located non-vulcanization portion one side.

As shown in fig. 4: the die plate group is of a lateral horizontal pushing and turning opening type, a hydraulic cylinder 6 for driving the lower die plate 4 to move is arranged at the side of the lower hot pressing plate 4, the output end of the hydraulic cylinder 6 is a hydraulic rod 61, the lower die plate 4 is hinged with one side of the upper die plate 3 corresponding to the hydraulic cylinder in a turnover way, the two sides of the lower hot pressing plate 11 corresponding to the moving direction of the die plate group are provided with slideways 5 which are attached to the side edges of the lower hot pressing plate for stable sliding, the slideway 5 extends towards the moving-out direction of the die plate group, a protective plate 51 is arranged on the slideway of the extending part, the protective plate is fixed on the slideway, the side of the upper die plate 3 corresponding to the slideway 5 is provided with a roller 30 which is positioned at the front end of the moving direction of the die plate group, the guard plate 51 is provided with a wheel groove 52 for the rolling of the roller 30, the wheel groove is used for limiting the rolling of the roller, the wheel groove 52 is L-shaped, and the corresponding turning part of the wheel groove 52 is in arc transition.

The mode of specifically realizing that the mould plate group is turned over and opened is as follows: the pneumatic cylinder passes through hydraulic stem drive bed die board and slides on bed die board, and bed die board has the slide of spacing bed die board simultaneously down, goes up the bed die board and articulates with bed die board unilateral, and the articulated realization is through the hinge, and the removal of bed die board drives the bed die board equidirectional removal simultaneously, but goes up the bed die board and has limit side gyro wheel, and the gyro wheel is arranged in the race, and the orbit of race forces the bed die board upwards to overturn for articulated side, accomplishes the operation of opening of template group.

This mode is avoided die plate group direct mount in the hot pressboard, is convenient for shift out die plate group and carries out the watering cooling to die plate group alone, and the temperature of hot pressboard need not reduce, prevents that the hot pressboard of next hot pressing vulcanization in-process need the reheat hot pressboard to lead to higher power consumption.

And the mould board group that extends makes things convenient for the workman to trade gluey operation more, reduces the risk of being scalded.

As shown in fig. 2: transition rollers 53 are arranged between corresponding extension parts of the slide way 5, a roller shaft 54 is arranged in the center of each transition roller 53, and the ends of the roller shaft 54 are in rotating fit with the slide way 5. The transition rollers are used for supporting the die plate group to move out of the lower hot press plate, and the rolling of the transition rollers is beneficial to reducing friction force in the extension part of the slideway.

As shown in fig. 1-4: the hydraulic rod 61 is hinged to the connecting end of the lower die plate 4, the lower die plate 4 is provided with a hinge seat 40 corresponding to the hinged position, and the hydraulic rod 61 is provided with a cross hole corresponding to the hinge seat 40. The hydraulic rod supports the lower die plate and is driven to be non-rigid, and in order to ensure that the lower die plate is fully contacted with the lower hot pressing plate, the driving mode of the hydraulic rod and the lower die plate needs to be ensured to be non-locking.

As shown in fig. 1: the positions of the lower hot pressing plate 11 corresponding to the supporting columns 12 are all provided with sliding sleeves 14 sleeved with the supporting columns 12. The height of the supporting column is also adjustable, and the supporting column is a smooth surface column body and is used for stably sliding the lower hot pressing plate up and down.

As shown in fig. 5: the side of the die groove 41 is provided with a knife groove 42, and the cross section of the knife groove 42 is V-shaped. The depth of the cutter groove is far smaller than that of the mold groove, the cutter groove is used for forming a circle of sideline on the side of the finished product sealant, and a weak part is arranged between the sideline and the sealing ring, so that the sealing ring can be conveniently separated.

As shown in fig. 5: the upper die plate 3 is provided with a limiting block 31, and a limiting groove 43 is formed in the position, corresponding to the limiting block 31, of the lower die plate 4.

Processing method of oversized sealing ring

(1) Calculating the length of the sealing ring, preparing a raw rubber strip which is longer than the perimeter of the sealing ring, wherein the common section of the rubber strip is square, placing the rubber strip into a mold groove corresponding to the mold plate group, and extending the end part of the raw rubber strip out of a notch;

(2) starting a hydraulic cylinder to move the die plate group into the lower hot pressing plate, controlling the hydraulic cylinder to enable the die plate group to be reserved outside, wherein the reservation is generally one fifth, and starting the hydraulic cylinder to drive the lower hot pressing plate to move towards the upper hot pressing plate until the lower hot pressing plate and the upper hot pressing plate are overlapped to start hot pressing;

(3) after hot pressing is finished, the vulcanized raw rubber strips are taken out through reverse flow operation in the step (2), the parts of the rubber strips, which correspond to the extending and reserving parts of the die plate set, are formed but not vulcanized, and redundant raw rubber materials are cut at the positions of the rubber strips, which correspond to the notches of the die grooves, and are in a strip shape at the moment; because the die plate group is reserved at one part outside, the temperature of the part cannot reach the normal vulcanization temperature, the normal vulcanization temperature is 160-180 ℃, but the temperature of the part is enough to melt the rubber strip and perform primary molding under the action of the die groove, but the vulcanization is not performed.

(4) And aligning the end part of the strip-shaped sealing ring, putting the end part of the strip-shaped sealing ring into the die groove again, positioning the end part of the sealing ring at a hot-pressing vulcanization position, repeating the hot-pressing operation, melting the end part of the sealing ring, vulcanizing and butting the end part of the sealing ring, and finishing the preparation of the sealing ring. And placing the molded unvulcanized part into a high-temperature vulcanizing area, butting the end parts, then melting and vulcanizing the unvulcanized part again to finish butting to form a complete sealing ring.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not exhaustive. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention.

Claims

1. The utility model provides a fashioned vulcanizing press of super large specification sealing washer which characterized in that:

the hot pressing device comprises a base (1), wherein a supporting block (2) is installed right above the base (1), the base (1) and the supporting block (2) are supported through corresponding supporting columns (12), a lower hot pressing plate (11) is installed on the upper side of the base (1), an upper hot pressing plate (21) corresponding to the lower hot pressing plate (21) is installed on the lower side of the supporting block (2), and a hydraulic device (13) for driving the lower hot pressing plate (11) to move upwards is installed on the base (1);

a die plate group is arranged on the upper side of the lower hot pressing plate (11), the die plate group comprises an upper die plate (3) and a lower die plate (4), four fifths of the die plate group are positioned at the overlapped part between the lower hot pressing plate and the upper hot pressing plate, and the other one fifth of the die plate group is used for a non-vulcanized part;

go up mould board (3) and bed die board (4) and correspond and offer mould groove (41) that are the U type, mould groove (41) are a plurality of and cup joint each other, the notch in mould groove (41) is located non-vulcanization portion one side.

2. The plate vulcanizing machine for molding the ultra-large specification sealing ring as claimed in claim 1, is characterized in that: mould board group opens the formula for the upset of side direction flat push, hot pressing board (4) avris is provided with pneumatic cylinder (6) that drive bed die board (4) removed down, the output of pneumatic cylinder (6) is hydraulic stem (61), one side convertible articulated that bed die board (4) and last mould board (3) correspond the pneumatic cylinder, hot pressing board (11) correspond mould board group moving direction's both sides down have slide (5), slide (5) extend to mould board group's removal direction, backplate (51) are installed to extension's slide, gyro wheel (30) are all installed to the avris that goes up mould board (3) to correspond slide (5), supply gyro wheel (30) rolling race (52) are installed in backplate (51), race (52) are L shape, and the arc transition is located in the turn that race (52) correspond.

3. The plate vulcanizing machine for molding the ultra-large specification sealing ring as claimed in claim 2, is characterized in that: transition rollers (53) are arranged between corresponding extension parts of the slide ways (5), a roller shaft (54) is arranged in the center of each transition roller (53), and the end parts of the roller shafts (54) are in rotating fit with the slide ways (5).

4. The plate vulcanizing machine for molding the ultra-large specification sealing ring as claimed in claim 3, is characterized in that: the hydraulic stem (61) is articulated with the link of bed die board (4), and bed die board (4) correspond articulated position and have articulated seat (40), and hydraulic stem (61) correspond articulated seat (40) and have the cross-over hole.

5. The vulcanizing press for molding the ultra-large specification sealing ring according to any one of claims 1 to 4, wherein: the lower hot pressing plate (11) is provided with sliding sleeves (14) sleeved with the supporting columns (12) at positions corresponding to the supporting columns (12).

6. The vulcanizing press for molding the ultra-large specification sealing ring according to any one of claims 1 to 4, wherein: the side of the die groove (41) is provided with a cutter groove (42), and the section of the cutter groove (42) is V-shaped.

7. The plate vulcanizing machine for molding the ultra-large specification sealing ring according to claim 6, is characterized in that: the upper die plate (3) is provided with a limiting block (31), and a limiting groove (43) is formed in the position, corresponding to the limiting block (31), of the lower die plate (4).

8. A processing method of an oversized sealing ring, which adopts a plate vulcanizing machine formed by the oversized sealing ring of any one of claims 1-7, and is characterized in that: