EP1521804A2 - Flexible disk for training equipment and method of its manufacture - Google Patents

Flexible disk for training equipment and method of its manufacture

Info

Publication number
EP1521804A2
EP1521804A2 EP02803329A EP02803329A EP1521804A2 EP 1521804 A2 EP1521804 A2 EP 1521804A2 EP 02803329 A EP02803329 A EP 02803329A EP 02803329 A EP02803329 A EP 02803329A EP 1521804 A2 EP1521804 A2 EP 1521804A2
Authority
EP
European Patent Office
Prior art keywords
flexible disk
mould
rubber
molded
flexible
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02803329A
Other languages
German (de)
French (fr)
Inventor
Slavka Ivanova Stefcheva
Georgy Tsvetkov Kamenov
Alexandar Veselinov Alexandrov
Slavcho Stanishev Trenchev
Tsvetanka Botuva Traikova
Emil Ivanov Sotirov
Ivailo Andreev Pavlov
Valentin Kirilov Anev
Tihomir Valchev Genov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zebra SA
Original Assignee
Zebra SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zebra SA filed Critical Zebra SA
Publication of EP1521804A2 publication Critical patent/EP1521804A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/06—User-manipulated weights
    • A63B21/0601—Special physical structures of used masses
    • A63B21/0607—Plastic masses, e.g. elastomers; Masses provided with plastic coverings
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/06—User-manipulated weights
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/0054—Features for injury prevention on an apparatus, e.g. shock absorbers
    • A63B2071/0063—Shock absorbers
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials

Definitions

  • the invention relates to a flexible disk for training equipment and a method of its manufacture to be used as an element of sports equipment for training, of low cost and high mechanical parameters, and in assemblies of disks of different weight to be fitted on equipment for training in fitness, sports and training centers and private training apparatuses.
  • a flexible bar is known in an apparatus for different exercises located in the center of a spring to that bar ends are pressed together only by overcoming spring force. To produce a variable force by which bar ends are pressed, a flexible rubber disk is wound around bar center. (DE 19620945).
  • a weight is known to be used with equipment for weightlifting exercises of the bar type, the plate being connected in such a way as to rotate during the exercise, this rotation being locked by a lever connected with the weight so that it rotates with the latter and located so that it is in contact with the outer foremost part of human hand moving during the exercise.
  • the weight has projecting and concave parts on its front and rear surfaces to allow the subsequent weights put one next to the other to clutch so that all weights rotate together without the lever entering all weights.
  • a weight exceptionally easy for use is known for exercises made by people, consisting of a disk of a mass sufficient to cause a resistance, when people move during the exercise and having at least one internal diameter with a central axis allowing to fit the disk on an equipment, the disk having a first and a second sides usually opposite one another and located radially on the central axis having a first and a second ends representing circles, an outer peripheral surface projecting between the first and second ends mentioned above of the first and the second sides mentioned above and at least one groove in the disk open towards the side of this outer peripheral surface the central axis of this groove crossing the internal central diameter, the groove being sufficiently large.
  • a disk of great strength for weight-lifting is known, made of granulated vulcanized rubber from scrap. (KRAIBURG DE)
  • KRAIBURG DE The disadvantage of this disk is that it should be very thick in order to achieve the effect desired which makes the use of many disks of different weight for training very difficult.
  • a method of manufacture of disks to be used in weightlifting where at the bottom of a mould consisting of a lower part and a cover is laid a sticking layer of raw rubber and a vulcanizing agent, then a mixture heated in advance and consisting of granulated vulcanized rubber made of scrap and a binding agent composed of raw rubber and a vulcanizing agent is added, the disk is molded by vulcanizing the mould by heating under pressure, thus obtaining at high temperature, a cohesion between the mixture heated and the sticking layer and molding a disk body as shaped by mould surfaces, and finally the molded disk is cooled, (technology of KRAIBURG GUMMI DEN GmbH)
  • a disadvantage of this method is the impossibility of making a disk of high specific weight, high density and high strength parameters at the same time, therefore it is impossible to manufacture many disks of different weight, diameter and thickness.
  • the purpose of this method is to manufacture a flexible disk for training equipment of high specific weight, great durability, high density and illimited possibilities of combination of weights, diameters, height, color, marking and to work out a method of its manufacture in which normal plastic rubber material is used as a raw material to obtain products of low cost
  • the invention consists in the manufacture of a flexible disk for training equipment containing granulated vulcanized rubber from scrap, an elastomer base, fillers, softeners, additives and vulcanizing agents included in a rubber mixture to be molded all of them in the following quantities by weight: 50-80% of rubber, 20-30% of chalk, 5-30% of carbon black.0-10% of oil. 0-40% of barite, 1-6% of zinc oxide, 0.1-0.8% of stearic acid, 3-18% of granulated vulcanized rubber from scrap, 0.1-0.9% of anti-oxydants, 0.1-0.9 % of accelerator of sulphide type, 0.3-1% of accelarator of guanidine type, 1-3% of sulphur.
  • a plastifier is used a filler in the rubber mixture to be molded.
  • the rubber mixture to be molded contains dyes.
  • the flexible disk for training equipment is manufactured with an outer decorative layer representing a colored flexible film and an inner basic layer on an elastomer base.
  • the invention includes also a method of manufacture of a flexible disk for training equipment according to which granulated vulcanized rubber from scrap is mixed with the other ingredients of the rubber mixture to be molded containing an elastomer base, fillers, softeners, additives and vulcanizing agents in an open or closed rubber mixer.
  • the rubber mixture thus obtained passes through a roll mill and a cooler until producing a smooth sheet of 5- 10mm thickness.
  • the sheets are placed on heating tables where they are cut to obtain blanks or strips of precisely determined weight and size, then the blanks cut are put in the mould which has additional insert or inserts and is detachably fixed to an upper and a lower platens of a multi-platen hydraulic press.
  • the latter is closed by closing the upper and lower platens of the hydraulic press and is vulcanized at a temperature of 150-170 C for 20-75 minutes, when a net is formed and a product subject to finishing is obtained.
  • This product is taken out of the mould, it is cut along its internal and external diameters, then a metal insert is introduced in its internal diameter on a stand.
  • an elastic dye forming an elastic film is laid on the flexible disk shaped in this way, and the colored flexible disks are then dried at atmospheric conditions for 1 to 6 hours and finally marked.
  • the flexible disk is shaped by introducing an additional insert in the mould consisting of limiting upper and lower plates, a lower molding plate, an upper molding plate, an intermediate molding plate, a core and fixing screws.
  • the additional insert is to be placed on the limiting lower plate and the molding lower plate with its core connected by means of the fixing screws, then the intermediate plate is fixed on the additional insert and the lower molding plate.
  • the rough blank made of the rubber mixture is placed in the area of the intermediate molding plate after which the mould is closed by pressing the upper and lower plates one to another so that it is possible to start vulcanizing.
  • the flexible disk is shaped after introducing in the mould two additional inserts on the lower limiting plate and the lower molding plate and the upper limiting plate and the upper molding plate respectively both having an upper and lower cores.
  • the flexible disk manufactured according to the invention has very high operational parameters of reliability, functionality, wear resistance and specific weight, and the method of its manufacture allows to achieve a high economic efficiency due to the low cost of the materials and the technological process used.
  • the composition of the rubber mixture on an elastomer base of which the flexible disks are to be molded allows to make blanks of well-determined weight and sizes corresponding to the pre-determined weight of the disk and to control their high relative density.
  • the flexible disk becomes a carrier of additional information.
  • the disk surface can be engraved in different ways with a view to marking different data and colored in a specific color.
  • the disk surface can be engraved in different ways with a view to marking different data and colored in a specific color.
  • Disk molding is simplified, and it is carried out in an anti-isocyanide medium free from poisonous binding ingredients harmful to the workers employed in their manufacture.
  • the method of manufacture of flexible disks according to the invention ensures a high compaction of the mixture to be molded and allows to manufacture disks of different sizes and thicknesses depending on the weight specified in advance.
  • FIG. 1 Partial view of a flexible disk for training equipment
  • Fig. 2 Cross-section of a flexible disk for training equipment
  • Fig.3 Cross-section of a mould for flexible disk with a blank to be vulcanized
  • Fig. 1 View of an additional insert for engraving intended to be built in the mould.
  • composition of the rubber mixture for molding flexible disks for training equipment can be illustrated with the following examples:
  • the mixture to be molded is composed of:
  • the mixture to be molded is composed of:
  • the flexible disks for training equipment are manufactured from the mixtures specified in Examples 1 and 2 which are obtained after mixing their ingredients in an open or a closed rubber mixer. Then the mixture to be molded is run through a roll mill and a cooler until obtaining a smooth sheet of a 5- 10mm thickness. These sheets are laid on heating tables where they are cut into blanks or strips of precisely determined sizes and weights. The blanks are put thereafter in the mould A (fig.3) which has an additional insert B (fig.4) and is fixed detachably to the upper and the lower platens of a multi- platen hydraulic press. After the blank is inserted in the mould, the latter is closed by closing the upper and the lower platens of the hydraulic press.
  • the mould is submitted to vulcanization at a temperature of 150-170C for 20-75 minutes, when a net is formed in the rubber mixture, and a product to be submitted to finishing is obtained.
  • This product is taken out of the mould, cut along its external and internal diameters, and a metal insert is forced into its internal diameter on a stand.
  • the flexible disk thus obtained is then coated with a resilient paint forming a flexible film on it.
  • the flexible disk painted are left to dry at atmospheric conditions for 1-6 hours and then they are marked.
  • the molding of the flexible disk C (fig.1 and fig.2) is carried out by introducing the additional insert B in the mould A consisting of upper and lower limiting plates 1, lower molding plate 2, upper molding plate 3, intermediate molding plate 4, core 5 and fixing screws 6.
  • the additional insert B is placed on the lower limiting plate 1 and the lower molding plate 2 with the built-in core 5 connected one with another by means of the fixing screws 6, then the intermediate molding plate 4 is fixed to the additional insert B and the lower molding plate 2.
  • the blank 7 made of the rubber mixture is placed on the intermediate molding plate 4.
  • the mould thus loaded is closed by closing the upper and the lower platens of the hydraulic press to which it is fastened in order to start vulcanizing.
  • the latter is molded by introducing two additional inserts on the lower limiting plate and the lower molding plate and the upper limiting plate and the upper molding plate respectively having an upper and lower cores. In this way it is possible to engrave elements on both radially opposed walls of the flexible disk at the same time.
  • the examples shown above are not limitative to the scope of the invention.
  • the flexible disks for training equipments are used in sports and training centers, where the sets can be combined by including in them disks of different weight, diameter, height and minimum thickness which is an advantage from economic point of view, since it is possible to make multi-colored combinations of different disks of different parameters for equipping different apparatuses at relatively low expenses, because the relative weights of the rubber mixture and the ready parts are controlled and a finishing is carried out by additional coloring.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

This invention relates to a flexible disk for training equipment and a method of its manufacture to be used as an element of sports equipment for training of high mechanical parameters where the flexible disk consists of granulated vulcanized rubber characterized by that it contains an elastomer base, fillers, softeners, additives and vulcanizing agents, all of them included in the rubber mixture to be molded.

Description

FLEXIBLE DISK FOR TRAINING EQUIPMENT AND METHOD OF ITS MANUFACTURE
HELD OF THE INVENTION
The invention relates to a flexible disk for training equipment and a method of its manufacture to be used as an element of sports equipment for training, of low cost and high mechanical parameters, and in assemblies of disks of different weight to be fitted on equipment for training in fitness, sports and training centers and private training apparatuses.
PRIOR ART
A flexible bar is known in an apparatus for different exercises located in the center of a spring to that bar ends are pressed together only by overcoming spring force. To produce a variable force by which bar ends are pressed, a flexible rubber disk is wound around bar center. (DE 19620945).
A weight is known to be used with equipment for weightlifting exercises of the bar type, the plate being connected in such a way as to rotate during the exercise, this rotation being locked by a lever connected with the weight so that it rotates with the latter and located so that it is in contact with the outer foremost part of human hand moving during the exercise. The weight has projecting and concave parts on its front and rear surfaces to allow the subsequent weights put one next to the other to clutch so that all weights rotate together without the lever entering all weights. ( US 4880229).
A weight exceptionally easy for use is known for exercises made by people, consisting of a disk of a mass sufficient to cause a resistance, when people move during the exercise and having at least one internal diameter with a central axis allowing to fit the disk on an equipment, the disk having a first and a second sides usually opposite one another and located radially on the central axis having a first and a second ends representing circles, an outer peripheral surface projecting between the first and second ends mentioned above of the first and the second sides mentioned above and at least one groove in the disk open towards the side of this outer peripheral surface the central axis of this groove crossing the internal central diameter, the groove being sufficiently large. (US 5853355)
A disk of great strength for weight-lifting is known, made of granulated vulcanized rubber from scrap. (KRAIBURG DE) The disadvantage of this disk is that it should be very thick in order to achieve the effect desired which makes the use of many disks of different weight for training very difficult.
A method of manufacture of disks to be used in weightlifting is known where at the bottom of a mould consisting of a lower part and a cover is laid a sticking layer of raw rubber and a vulcanizing agent, then a mixture heated in advance and consisting of granulated vulcanized rubber made of scrap and a binding agent composed of raw rubber and a vulcanizing agent is added, the disk is molded by vulcanizing the mould by heating under pressure, thus obtaining at high temperature, a cohesion between the mixture heated and the sticking layer and molding a disk body as shaped by mould surfaces, and finally the molded disk is cooled, (technology of KRAIBURG GUMMI DEN GmbH)
A disadvantage of this method is the impossibility of making a disk of high specific weight, high density and high strength parameters at the same time, therefore it is impossible to manufacture many disks of different weight, diameter and thickness.
SUMMARY OF THE INVENTION
The purpose of this method is to manufacture a flexible disk for training equipment of high specific weight, great durability, high density and illimited possibilities of combination of weights, diameters, height, color, marking and to work out a method of its manufacture in which normal plastic rubber material is used as a raw material to obtain products of low cost
The invention consists in the manufacture of a flexible disk for training equipment containing granulated vulcanized rubber from scrap, an elastomer base, fillers, softeners, additives and vulcanizing agents included in a rubber mixture to be molded all of them in the following quantities by weight: 50-80% of rubber, 20-30% of chalk, 5-30% of carbon black.0-10% of oil. 0-40% of barite, 1-6% of zinc oxide, 0.1-0.8% of stearic acid, 3-18% of granulated vulcanized rubber from scrap, 0.1-0.9% of anti-oxydants, 0.1-0.9 % of accelerator of sulphide type, 0.3-1% of accelarator of guanidine type, 1-3% of sulphur.
In a second version of the invention a plastifier is used a filler in the rubber mixture to be molded.
In a third version of the invention the rubber mixture to be molded contains dyes. In a fourth version of the invention the flexible disk for training equipment is manufactured with an outer decorative layer representing a colored flexible film and an inner basic layer on an elastomer base.
The invention includes also a method of manufacture of a flexible disk for training equipment according to which granulated vulcanized rubber from scrap is mixed with the other ingredients of the rubber mixture to be molded containing an elastomer base, fillers, softeners, additives and vulcanizing agents in an open or closed rubber mixer. The rubber mixture thus obtained passes through a roll mill and a cooler until producing a smooth sheet of 5- 10mm thickness. The sheets are placed on heating tables where they are cut to obtain blanks or strips of precisely determined weight and size, then the blanks cut are put in the mould which has additional insert or inserts and is detachably fixed to an upper and a lower platens of a multi-platen hydraulic press. After the blank cut is put into the mould the latter is closed by closing the upper and lower platens of the hydraulic press and is vulcanized at a temperature of 150-170 C for 20-75 minutes, when a net is formed and a product subject to finishing is obtained. This product is taken out of the mould, it is cut along its internal and external diameters, then a metal insert is introduced in its internal diameter on a stand. Next an elastic dye forming an elastic film is laid on the flexible disk shaped in this way, and the colored flexible disks are then dried at atmospheric conditions for 1 to 6 hours and finally marked.
The flexible disk is shaped by introducing an additional insert in the mould consisting of limiting upper and lower plates, a lower molding plate, an upper molding plate, an intermediate molding plate, a core and fixing screws. The additional insert is to be placed on the limiting lower plate and the molding lower plate with its core connected by means of the fixing screws, then the intermediate plate is fixed on the additional insert and the lower molding plate. The rough blank made of the rubber mixture is placed in the area of the intermediate molding plate after which the mould is closed by pressing the upper and lower plates one to another so that it is possible to start vulcanizing.
In a second version of the invention the flexible disk is shaped after introducing in the mould two additional inserts on the lower limiting plate and the lower molding plate and the upper limiting plate and the upper molding plate respectively both having an upper and lower cores.
The advantages of this invention are as follows:
The flexible disk manufactured according to the invention has very high operational parameters of reliability, functionality, wear resistance and specific weight, and the method of its manufacture allows to achieve a high economic efficiency due to the low cost of the materials and the technological process used.
By combining the basic substances used in the rubber mixture to be molded it is possible to ensure the high specific weight, the compression strength and the high durability of the flexible disk by reducing its thickness in addition, i.e. it is possible to manufacture disks of relative large surface along the diameter which facilitates the fitting of disks on the training equipment and causes a relatively uniform distribution of the weight on it and consequently a smaller torque with respect to the axis of the equipment, and as a result of all that its use is easier and the safety of the trained competitors is greater. The composition of the rubber mixture on an elastomer base of which the flexible disks are to be molded allows to make blanks of well-determined weight and sizes corresponding to the pre-determined weight of the disk and to control their high relative density.
Due to the technological possibility of coloring and the use of an additional insert in the structure of the flexible disk mould which enables to make a relief layer technologically, the flexible disk becomes a carrier of additional information.
Depending on the requirements of the relevant user, the disk surface can be engraved in different ways with a view to marking different data and colored in a specific color. Thus it is possible to make combinations of disks of different colors and weights assembled depending on the requirements of the user and on the equipment available to the latter.
Disk molding is simplified, and it is carried out in an anti-isocyanide medium free from poisonous binding ingredients harmful to the workers employed in their manufacture.
The method of manufacture of flexible disks according to the invention ensures a high compaction of the mixture to be molded and allows to manufacture disks of different sizes and thicknesses depending on the weight specified in advance.
The expenses for raw materials and energy use in the manufacture of flexible disks are considerably smaller compared to those related to the manufacture of similar disks from granulated vulcanized rubber from scrap and binder.
THE DRAWINGS
An example of manufacture of a mould for flexible disks, a working drawing of a flexible disk and an additional insert, all of them explaining the character of the invention are shown in the figures attached, as follows: Fig. 1 - Partial view of a flexible disk for training equipment; Fig. 2 - Cross-section of a flexible disk for training equipment; Fig.3 - Cross-section of a mould for flexible disk with a blank to be vulcanized; Fig. 1 - View of an additional insert for engraving intended to be built in the mould.
DETAILED DESCRIPTION
The composition of the rubber mixture for molding flexible disks for training equipment can be illustrated with the following examples:
EXAMPLE 1
The mixture to be molded is composed of:
Rubber - 50 kg; Chalk - 130 kg;
Carbon black - 40 kg:
Oil - 10 kg;
Barite -35 kg;
Zinc oxide - 5 kg;
Stearic acid - 0.9 kg;
Vulcanized granulated rubber from scrap - 8kg;
Anti-oxydants - 0.8 kg;
BMTS accelerator - 1kg;
DPG accelerator - 0.9 kg;
Sulphur - 2kg.
EXAMPLE 2
The mixture to be molded is composed of:
Rubber - 100 kg;
Chalk - 100 kg;
Carbon black - 50 kg:
Oil - 10 kg;
Barite - 35 kg;
Zinc oxide - 3 kg;
Stearic acid - 0.9 kg;
Vulcanized granulated rubber from scrap - 12kg;
Anti-oxydants - 0.8 kg;
BMTS accelerator- 1.3 kg;
DPG accelerator - 0.7 kg;
Sulphur - 2kg.
The flexible disks for training equipment are manufactured from the mixtures specified in Examples 1 and 2 which are obtained after mixing their ingredients in an open or a closed rubber mixer. Then the mixture to be molded is run through a roll mill and a cooler until obtaining a smooth sheet of a 5- 10mm thickness. These sheets are laid on heating tables where they are cut into blanks or strips of precisely determined sizes and weights. The blanks are put thereafter in the mould A (fig.3) which has an additional insert B (fig.4) and is fixed detachably to the upper and the lower platens of a multi- platen hydraulic press. After the blank is inserted in the mould, the latter is closed by closing the upper and the lower platens of the hydraulic press. Further the mould is submitted to vulcanization at a temperature of 150-170C for 20-75 minutes, when a net is formed in the rubber mixture, and a product to be submitted to finishing is obtained. This product is taken out of the mould, cut along its external and internal diameters, and a metal insert is forced into its internal diameter on a stand. The flexible disk thus obtained is then coated with a resilient paint forming a flexible film on it. The flexible disk painted are left to dry at atmospheric conditions for 1-6 hours and then they are marked.
The molding of the flexible disk C (fig.1 and fig.2) is carried out by introducing the additional insert B in the mould A consisting of upper and lower limiting plates 1, lower molding plate 2, upper molding plate 3, intermediate molding plate 4, core 5 and fixing screws 6. The additional insert B is placed on the lower limiting plate 1 and the lower molding plate 2 with the built-in core 5 connected one with another by means of the fixing screws 6, then the intermediate molding plate 4 is fixed to the additional insert B and the lower molding plate 2. The blank 7 made of the rubber mixture is placed on the intermediate molding plate 4.The mould thus loaded is closed by closing the upper and the lower platens of the hydraulic press to which it is fastened in order to start vulcanizing.
In a second version of manufacture of the flexible disk the latter is molded by introducing two additional inserts on the lower limiting plate and the lower molding plate and the upper limiting plate and the upper molding plate respectively having an upper and lower cores. In this way it is possible to engrave elements on both radially opposed walls of the flexible disk at the same time. The examples shown above are not limitative to the scope of the invention.
USE OF THE INVENTION
The flexible disks for training equipments, subject of this invention, are used in sports and training centers, where the sets can be combined by including in them disks of different weight, diameter, height and minimum thickness which is an advantage from economic point of view, since it is possible to make multi-colored combinations of different disks of different parameters for equipping different apparatuses at relatively low expenses, because the relative weights of the rubber mixture and the ready parts are controlled and a finishing is carried out by additional coloring.

Claims

PATENT CLAIMS
1. A flexible disk for training equipment consisting of granulated vulcanized rubber characterized by that it contains an elastomer base, fillers, softeners, additives and vulcanizing agents, all of them included in the rubber mixture to be molded and containing the following quantities in % by weight of: 50-80% of rubber, 20-30% of chalk, 5-30% of carbon black, 0-10% of oil, 0-40% of barite, 1-6% of zinc oxide, 0.1- 0.8% of stearic acid, 3-18% of granulated vulcanized rubber from scrap, 0.1-0.9% of anti-oxydants, 0.1-0.9 % of accelerator of sulphide type, 0.3-1% of accelarator of guanidine type, 1-3% of sulphur.
2. A flexible disk according to Claim 1 above, characterized by that a plastifier is used as a filler in the rubber mixture to be molded.
3. A flexible disk according to Claim 1 above, characterized by that the rubber mixture to be molded contains dyes.
4. A flexible disk according to Claim 1 above, characterized by that it consists of an outer decorative layer and inner basic layer on an elastomer base where the decorative layer represents a colored elastic film.
5. A method of manufacture of a flexible disk for training equipment according to which the mixture to be molded containing granulated vulcanized rubber from scrap is inserted in a mould which is pressed at high temperature and than left to cool and characterized by that the granulated vulcanized rubber from scrap is mixed in an open or closed rubber mixer with the other ingredients included in the composition of the mixture to be molded consisting of an elastomer base, fillers, softeners, additives and vulcanizing agents, then run through a roll mill and a cooler until obtaining a smooth sheet of 5-lOmm thickness, these sheets being laid on heating tables where they are cut into blanks or strips of precisely determined weight and sizes, the blanks are then inserted in mould (A) having additional insert (B) or inserts (B) fastened detachably to the upper and the lower platens respectively of a multi-platen hydraulic press, then the mould (A) is closed by closing the upper and lower platens of the hydraulic press and vulcanized at a temperature of 150-170 C for 20-75 minutes, a net being formed in the rubber mixture during the vulcanization and the article thus obtained being taken out of the mould (A) and cut along its internal and external diameters, a metal insert being forced into its internal diameter and an elastic paint forming a flexible film being laid on the flexible disk thus manufactured, then the flexible disks painted are left to dry at atmospheric conditions for 1-6 hours and marked.
6. A method of manufacture of a flexible disk according to Claim 5 above, characterized by that the flexible disks (C) are molded by introducing the additional insert (B) into the mould (A) consisting of the limiting upper and lower plates (1), the lower molding plate (2), the upper molding plate (3), the intermediate molding plate (4), the core(5) and fixing screws (6), the additional insert (B) being placed on the limiting lower plate (1) and the molding lower plate (2) with its built-in core (5) connected by means of the fixing screws (6) and the intermediate molding plate (4) being fastened, then the blank (7) made from the rubber mixture is placed on the intermediate molding plate (4), the mould (A) thus charged is closed by closing by the upper and the lower platens of the hydraulic press to which it is fastened with a view to starting vulcanizing.
7. A method of manufacture of a flexible disk according to Claim 5 above, characterized by that the flexible disks (C) are molded by introducing in mould (A) two additional inserts (B) on the lower limiting plate (1) and the lower molding plate (2) and the upper limiting plate (1) and the upper molding plate (3) having an upper and lower cores.
EP02803329A 2001-11-23 2002-11-21 Flexible disk for training equipment and method of its manufacture Withdrawn EP1521804A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BG106143A BG64778B1 (en) 2001-11-23 2001-11-23 Elastic disc for training tools, matrix and process for the production thereof
BG10614301 2001-11-23
PCT/BG2002/000028 WO2003043705A2 (en) 2001-11-23 2002-11-21 Flexible disk for training equipment and method of its manufacture

Publications (1)

Publication Number Publication Date
EP1521804A2 true EP1521804A2 (en) 2005-04-13

Family

ID=3928579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02803329A Withdrawn EP1521804A2 (en) 2001-11-23 2002-11-21 Flexible disk for training equipment and method of its manufacture

Country Status (4)

Country Link
EP (1) EP1521804A2 (en)
AU (1) AU2002364782A1 (en)
BG (1) BG64778B1 (en)
WO (1) WO2003043705A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2495277B (en) 2011-09-29 2017-12-13 Escape Enviro Ltd Exercise weight structure

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459056A1 (en) * 1979-06-21 1981-01-09 Guillier Lucien Weight for dumb bells - has central sleeve fitting into hole in metal plate and covered with moulded rubber disc
US4880229A (en) * 1985-06-03 1989-11-14 Progressive Health & Fitness Weight plate for exercise device
JP3304189B2 (en) * 1994-03-18 2002-07-22 マツダ株式会社 Molding rubber composition containing vulcanized scrap rubber and method for producing the same
DE19620945A1 (en) * 1996-05-24 1997-11-27 Ley Robert Training device
US5853355A (en) * 1997-02-11 1998-12-29 York Barbell Co., Inc. Manipulatable weight plate
US6265454B1 (en) * 1999-08-27 2001-07-24 Bridgestone/Firestone Research, Inc. Rubber compositions containing ground tire rubber

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03043705A2 *

Also Published As

Publication number Publication date
AU2002364782A1 (en) 2003-06-10
WO2003043705A3 (en) 2003-10-09
BG106143A (en) 2003-05-30
AU2002364782A8 (en) 2003-06-10
BG64778B1 (en) 2006-03-31
WO2003043705A2 (en) 2003-05-30

Similar Documents

Publication Publication Date Title
DE69814374T2 (en) POLYURETHANE DIMENSIONS FOR TWO AND THREE-PIECE GOLF BALLS
CA2009333C (en) Polyurethane golf ball cover
DE2723625C2 (en) Ball made of thermoplastic material and process for its manufacture
US5721304A (en) Golf ball composition
KR102023205B1 (en) Method of making multi-color golf ball having discontinuous colored coating and resulting multi-color golf ball
DE69917153T2 (en) TWO AND THREE PIECE POLYURETHANE BALLS
KR20120135096A (en) Flexible implement handle grip and method of making same
CN104689530B (en) The multi-layer golf ball of foamed core with optional distribution of weight
US20160158605A1 (en) Color golf ball constructions having at least one contrasting and distinct color appearance formed in a surface
US6207095B1 (en) Process for manufacturing multi-layered cores
EP0388740A2 (en) Shell for offset-cylinder for rotary machines
WO2003043705A2 (en) Flexible disk for training equipment and method of its manufacture
US20080200315A1 (en) Rubber barbell weight with at least one colored rubber belt and a method of making the same
US20080194362A1 (en) Resilient baseball and method of manufacture
DE3007615A1 (en) METHOD FOR PRODUCING A MATRIX FOR SHAPING A HEAD MODEL FOR WIGS
AU2774801A (en) Game ball with a urethane gum rubber surface
JPS55124635A (en) Method for molding of multilayered product of rubbers with different qualities
CN108704256A (en) A kind of rubber coated round dumbbell and preparation method thereof
CA2349778A1 (en) Vibration damping rubber member having excellent durability and method of producing the same
CN112961414B (en) Sole rubber composition and preparation method and application thereof
AU8518498A (en) Compressible polyurethane compositions having minimal tack and articles herefrom
DE2918193C2 (en) Pressureless foam ball and method and device for its manufacture
US1677881A (en) Mold
JPS5640538A (en) Rubber mat and manufacture thereof
US1816822A (en) Method of making floor coverings

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20041025

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: MK

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20080603