JPH11268041A - Mold setting machine for unvulcanized rubber roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold setting machine for unvulcanized rubber rollers which is capable of introducing a vulcanization molding die and an unvulcanized rubber roller through a through hole in the cylindrical vulcanization molding die without hurting an unvulcanized rubber part. SOLUTION: An unvulcanized rubber roller 4 is supported, in a movable manner into a specified direction, by a guide groove 16. On the other hand, a vulcanization molding die 5 is supported by a die supporting groove 21 in such a manner that the center line of a through hole coincides with the center line of the unvulcanized rubber roller 5 placed in the guide groove 16. Further, the unvulcanized rubber roller 4 placed in the guide groove 16 is pressed out of the one end part side of the rooller 4 to be inserted into the through hole of the vulcanization molding die 5, using a movable member 32. Then a lifting member with tapered upper faces 42c, 42c, is made to ascend to remove the vulcanization molding die 6 from its support position by the die supporting groove 21 and discharge the die 6 into the work receiving tray 44 direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unvulcanized rubber roller molding machine.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a rubber roller such as a charging roller, for example, a cylindrical unvulcanized rubber portion is externally fitted to the outer periphery of a cored bar, and an unvulcanized rubber roller is formed. Need to be vulcanized. When vulcanizing such an unvulcanized rubber roller, a flange-shaped lid member having a diameter larger than that of the unvulcanized rubber portion is attached to both ends of the core metal, and a through-hole of a cylindrical vulcanization molding die is provided. The unvulcanized rubber roller is inserted inside the vulcanizing mold, and the vulcanization mold is closed with both ends closed by a lid member. At present, the operation of inserting the unvulcanized rubber roller into the through-hole of the vulcanization molding die is performed manually by an operator.

[0003]

However, when the operation of inserting the unvulcanized rubber roller into the vulcanization molding die is performed manually by an operator, the center line of the through hole of the vulcanization molding die is required. The center line of the unvulcanized rubber roller is easily inclined with respect to the center line of the through hole of the vulcanized molding die during insertion because it is difficult to insert There is a possibility that the inner surface of the molding die is damaged or the surface of the unvulcanized rubber portion of the rubber roller is damaged.

[0004] The present invention has been made in view of such a point, and when an unvulcanized rubber roller is inserted into a through hole of a cylindrical vulcanization molding die, the vulcanization molding die and the unvulcanized rubber roller are inserted. An object of the present invention is to provide an unvulcanized rubber roller mold assembly machine that can be inserted without damaging an unvulcanized rubber portion.

[0005]

According to a first aspect of the present invention, a cylindrical unvulcanized rubber portion is provided on a cored bar, and flanges having a diameter larger than the unvulcanized rubbered portion at both ends of the cored bar. An unvulcanized rubber roller molding machine for inserting an unvulcanized rubber roller to which a member is attached into a through hole of a cylindrical vulcanization molding die, wherein the unvulcanized rubber roller is moved in a specific direction. A guide groove for supporting the vulcanization molding die, and a center line of the through-hole of the vulcanization mold coincides with a center line of an unvulcanized rubber roller placed in the guide groove. A mold supporting groove for supporting the movable member and a movable member movable along the guide groove, and the movable member presses an unvulcanized rubber roller mounted on the guide groove from one end side. Roller inserting means for inserting into the through-hole of the vulcanization mold.

According to the first aspect of the present invention, since the unvulcanized rubber roller placed in the guide groove is supported by the flange members at both ends of the core, the movable member of the roller inserting means can be used. By pressing the unvulcanized rubber roller from one end side, the unvulcanized rubber roller is guided in the guide groove, and without contacting the unvulcanized rubber portion with the side surface of the guide groove, etc. Inserted.

According to a second aspect of the present invention, in the unvulcanized rubber roller assembly machine of the first aspect, the bottom surface of the mold supporting groove is higher than the bottom surface of the guide groove by a thickness corresponding to the thickness of the vulcanizing mold. It is just low.

According to the second aspect of the present invention, the mold supporting groove is
The bottom surface of the vulcanization molding is lower than the bottom surface of the guide groove by the height corresponding to the thickness of the vulcanization molding die. The vulcanization molding die is supported such that the center line of the through hole of the die coincides with the center line of the unvulcanized rubber roller placed in the guide groove.

According to a third aspect of the present invention, the guide groove has a groove surface made of a synthetic resin having a small coefficient of friction in the unvulcanized rubber roller forming machine according to the first or second aspect.

According to the third aspect of the present invention, since the groove surface of the guide groove is formed of a resin having a small friction coefficient, the unvulcanized rubber roller is smoothly guided toward the vulcanization mold.

According to a fourth aspect of the present invention, there is provided the mold assembly of an unvulcanized rubber roller according to any one of the first to third aspects, further comprising an ascending / descending elevating member. There is provided a die support release means for releasing the support of the vulcanization molding die by the support groove.

According to the fourth aspect of the present invention, the vulcanization molding die is taken out of the mold support groove upward by raising the elevating member, and the vulcanization molding die is supported by the mold support groove. Is released.

According to a fifth aspect of the present invention, in the mold assembly of the unvulcanized rubber roller according to any one of the first to fourth aspects, the upper surface of the elevating member is formed as a tapered surface.

According to the fifth aspect of the present invention, since the upper surface of the elevating member is a tapered surface, when the support of the vulcanizing mold by the mold supporting groove is released by the elevating member, vulcanization molding is performed. The mold is discharged in a specific direction along the tapered surface.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a rubber roller as a final product.
In the figure, a rubber roller 1 has a cylindrical rubber portion 3 fixed (vulcanized and adhered) to an outer peripheral surface of a cored bar 2 so as to be integrated.

As shown in FIG. 2, the vulcanization molding die 5 of the rubber roller 1 has a cylindrical tube structure with both ends opened, and both ends have a pair of annular lid members 6, 6 ( (Flange member) so as to be detachably closed.

The vulcanization mold 5 has a through-hole 5a (cavity) having a circular cross section whose inner diameter is equal to the outer diameter of the rubber portion 3 (after vulcanization) of the rubber roller 1. Therefore, in the state of the unvulcanized rubber roller 4 before vulcanization, the outer diameter of the unvulcanized rubber portion 7 is smaller than the outer diameter of the lid member 6, as shown in FIG. On the other hand, the central portion 5b of the vulcanizing mold 5 has a wall thickness smaller than that of the end portions 5c, 5c, and is set to have a higher temperature rising rate than the end portions 5c, 5c. Each of the lid members 6 has a support hole 6a for supporting an end of the cored bar 2 at the center, and a plurality of gas vent holes 6 around the support hole 6a.
, are provided penetrating therethrough.

In order to load the unvulcanized rubber roller 4 into the vulcanization molding die 5, the vulcanization molding die 5 is placed in a horizontal state, and the unvulcanized rubber portion 7 is covered on the core 2. The support holes 6a of the lid member 6 are fitted to the respective ends of the cored bar 2 of the unvulcanized rubber roller 4 attached thereto, and then the unvulcanized rubber roller 4 is inserted into the through hole 5a of the vulcanization mold 5. Then, the lid member 6 is fixed to the vulcanization mold 5. At the time of this insertion, an unvulcanized rubber roller mold assembly machine 1 according to the present invention described later.
1 is used.

When the vulcanization molding die 5 is heated together with the lid member 6 after the insertion is completed, the unvulcanized rubber portion 7 inside is foamed and vulcanized, and the vulcanized rubber roller 1 is obtained.

The rubber material used for forming the rubber portion 3 of the rubber roller 1 includes natural rubber, chloroprene rubber, styrene / butadiene rubber, ethylene / propylene rubber, butyl rubber, acryl / nitrile / butadiene rubber, silicon rubber, urethane rubber. , Fluoro rubber, halogenated butyl rubber, chlorosulfonated polyethylene rubber, hydrogenated nitrile rubber, crosslinked rubber such as epichlorohydrin rubber, and copolymers using these monomers, blends thereof, and polyolefins , Polyester, polyether, polyamide, polyurethane thermoplastic elastomers and the like.

This rubber material contains a foaming agent. As such a blowing agent, azodicarbonamide, azobisisobutyronitrile, diazoaminobenzene, dinitrosopentamethylenetetramine, p-toluenesulfonylhydrazide, p, p'-oxybis (benzenesulfonylhydrazide) and the like are preferably used. You. This foaming agent accounts for 0.5 to 50% by volume of the rubber roller 1 obtained by foam molding.
It is desirable to set the blending amount so that the bubbles become bubbles. That is, if the content is less than 0.5% by volume, the desired effect cannot be obtained, while if it exceeds 50% by volume, the elastic modulus of the rubber roller 1 becomes too low.

The rubber material also contains an electric resistance adjuster. As the electric resistance adjusting agent, carbon black is suitable, and in addition, graphite, conductive metal particles, or various surfactants can also be used. In addition, the rubber material may contain various softeners for the purpose of adjusting the hardness of the rubber roller 1 (to reduce the hardness). Such softeners include mineral oils such as aromatic, naphthenic and paraffinic oils, DOP, DOA, DO
Plasticizers such as S and vegetable oils such as rapeseed oil and coconut oil can be used.

Further, a rubber chemical and a rubber additive can be added to the rubber material as required. Chemicals for rubber, additives for rubber include sulfur, vulcanizing agents such as peroxides, zinc white, vulcanization accelerators such as stearic acid,
Vulcanization accelerators such as sulfenamides, thiurams, thiazoles, and guanidines, ultraviolet absorbers, antiozonants, tackifiers, etc. can be used, and various reinforcing agents and friction coefficient adjustment Agents, silica, talc, clay and other inorganic fillers can also be arbitrarily selected.

Next, an unvulcanized rubber roller mold assembly machine for inserting the unvulcanized rubber roller 4 into the vulcanization mold 5 will be described with reference to FIGS.

In FIGS. 3 to 5, reference numeral 11 denotes an unvulcanized rubber roller assembling machine, in which an unvulcanized rubber portion 7 is provided on a cored bar 2 in a through hole 5a of a vulcanization molding die 5. The unvulcanized rubber roller 4 is inserted.

The mold setting machine 11 vulcanizes the unvulcanized rubber roller 4 mounted on the base frame 12 with the bottom plate 13 and the left and right side plates 14 and 15 by roller insertion means 31 described later. A guide groove 16 is formed so as to be movably supported in a specific direction when it is moved to the molding die 5 side. The bottom plate 13 and the left and right side plates 14, 15 are formed of a synthetic resin having a low friction coefficient (for example, MC nylon resin), and the guide groove 16 has a groove surface formed of a synthetic resin having a small friction coefficient. Therefore, the unvulcanized rubber roller 4 is smoothly guided toward the vulcanization mold 5.

As described above, when the unvulcanized rubber roller 4 is inserted, the lid members 6 and 6 for closing the openings at both ends of the vulcanization mold 5 are provided at both ends of the cored bar 2. In the unvulcanized state, since the outer diameter of the unvulcanized rubber portion 7 is smaller than the outer diameter of the lid member 6, the unvulcanized rubber portion 7 does not come into contact with any of the lid members 6. , 6 are guide grooves 16
Is smoothly inserted into the vulcanization mold 5 by sliding on the side surface of the mold.

A mold supporting groove 21 is provided continuously in the longitudinal direction of the guide groove 16. Mold support groove 2
1 supports the vulcanization molding die 5 such that the center line of the through-hole 5a of the vulcanization molding die 5 coincides with the center line of the unvulcanized rubber roller 4 movably supported by the guide groove 16. It is supposed to.

The mold supporting groove 21 has a first regulating member 22 having substantially the same length as the vulcanization molding die 5 and regulating the vulcanization molding die 5 on one side, and a vulcanizing member at the front side thereof. Second regulating members 23, 23 for regulating both ends of the vulcanization mold, and a third regulation for regulating the end of the vulcanization mold 5 on the side opposite to the side where the unvulcanized rubber roller 4 is inserted. It is formed by the regulating member 24. Further, the bottom surface of the mold supporting groove 21 is lower than the bottom surface of the guide groove 16 by a height corresponding to the thickness of the end of the vulcanizing mold 5. Therefore, the stepped portion corresponding to the thickness of the end of the vulcanization mold 5 is formed in the guide groove 1.
6 and the mold supporting groove 21. In addition, the third regulating member 24 regulates at a certain interval from the end face of the vulcanizing mold 5 (see FIG. 6).

Then, the unvulcanized rubber roller 4 is pressed by the movable member 32 from one end side in the vicinity of the guide groove 16 so as to be inserted into the through hole 5a of the vulcanization mold 5 at the other end side. The roller insertion means 31 for inserting the roller from the roller is provided. As shown in FIG. 7, the movable member 32 has a contact portion 32a narrower than the width of the guide groove 16, and is moved forward and backward by the driving means 33 (electrically-driven slide base).

A mold support releasing means 41 for releasing the support of the vulcanization mold 5 by the mold support groove 21 is provided below the mold support groove 21. The mold support releasing means 41 includes an elevating member 42 that abuts on a lower portion of the vulcanization molding die 5 and a cylinder 43 as a driving means for elevating the elevating member 42.

The elevating member 42 includes a side plate portion 4 having upper surfaces formed on tapered surfaces 42b, 42b on both sides of the substrate portion 42a.
2c, 42c, and the tapered surfaces 42b, 42b of the side plate portions 42c, 42c come into contact with both ends of the vulcanization mold 5 from below. When the contact is lifted in contact with the lower side, the vulcanization molding die 5 is moved to the side plate portion 42.
The workpieces 44 are discharged along the tapered surfaces 42b, 42b which are the upper surfaces of the workpieces c, 42c in the direction in which the work tray 44 is located.

Next, the operation of inserting the unvulcanized rubber roller 4 by the above-described mold assembly machine will be described.

When the unvulcanized rubber roller 4 is inserted into the vulcanization molding die 5, the unvulcanization rubber roller 4 is first attached to both ends of the core 2 as described above. Cover members 6 and 6 for closing the openings at both ends of the
6 is placed. At this time, since the outer diameter of the unvulcanized rubber portion 7 is smaller than the outer diameter of the lid member 6, the outer peripheral surface of the unvulcanized rubber portion 7 does not contact the inner wall surface of the guide groove 16.

On the other hand, a vulcanization mold 5 into which the unvulcanized rubber roller 4 is inserted is placed in the mold support groove 21. In this state, since the bottom surface of the mold supporting groove 21 is lower than the bottom surface of the guide groove 16 by a height corresponding to the thickness of the end portion of the vulcanizing mold 5, the unvulcanized rubber roller 4 is In the state of being placed in the guide groove 16, the center line thereof coincides with the center line of the through hole 5 a of the vulcanization mold 5 placed in the mold support groove 21.

Then, while pressing one end of the unvulcanized rubber roller 4 with the movable member 32 of the roller insertion means 31, the unvulcanized rubber roller 4 (actually, the lid members 6, 6) is moved through the guide groove 16. It is slid and inserted into the through hole 5a of the vulcanization mold 5 from the other end.

As described above, when the lid members 6 and 6 slide on the side surfaces of the guide groove 16, the unvulcanized rubber roller 4
It is inserted into the vulcanization mold 5 without difficulty.

After the insertion is completed, the lifting member 42 is raised by the operation of the cylinder 43, and the side plate 42 of the lifting member 42
The c and 42c abut against both ends of the vulcanization mold 5 from below, and the vulcanization mold 5 can be lifted. Then, the vulcanization mold 5 is discharged in a specific direction along the tapered surfaces 42b, 42b, which are the upper surfaces of the side plates 42c, 42c, and is stocked in the work tray 44.

[0040]

The present invention is embodied in the form described above, and has the following effects.

According to the first aspect of the present invention, the vulcanization molding die is formed such that the center line of the through hole of the vulcanization molding die coincides with the center line of the unvulcanized rubber roller placed in the guide groove. Since the unvulcanized rubber roller placed in the guide groove is moved along the guide groove by the movable member of the roller inserting means because the support is made by the mold support groove, the unvulcanized rubber roller is not supported on the side surface of the guide groove. The vulcanized rubber roller can be easily inserted into the vulcanization mold without bringing the unvulcanized rubber portion into contact with the unvulcanized rubber roller and without making the unvulcanized rubber roller oblique.

According to the second aspect of the present invention, since the bottom surface of the mold supporting groove is made lower than the bottom surface of the guide groove by a height corresponding to the thickness of the vulcanization molding die, the vulcanization molding die can be used. Simply by placing the vulcanization molding die in the guide groove, the center line of the through hole of the vulcanization molding die can be supported so as to coincide with the center line of the unvulcanized rubber roller placed in the guide groove.

According to the third aspect of the invention, since the groove surface of the guide groove is formed of a resin having a small friction coefficient, the unvulcanized rubber roller can be smoothly guided to the vulcanization mold.

According to the fourth aspect of the present invention, since the mold supporting release means for releasing the support of the vulcanization molding die by the mold supporting groove by raising the elevating member is provided, it is only necessary to raise the elevating member. By raising the vulcanization mold, the support of the vulcanization mold by the mold supporting groove can be easily released.

According to the fifth aspect of the present invention, since the upper surface of the elevating member is tapered, the vulcanization molding die can be easily moved in a specific direction only by releasing the support of the vulcanization molding die by the die supporting means. Can be discharged.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state after vulcanization of an unvulcanized rubber roller according to the present invention.

FIG. 2 is an explanatory view showing a state in which an unvulcanized rubber roller according to the present invention is inserted into a vulcanization molding die.

FIG. 3 is a plan view of an unvulcanized rubber roller forming machine according to the present invention.

FIG. 4 is a front view of the same.

FIG. 5 is a side view of the same.

FIG. 6 is a sectional view taken along line AA in FIG. 3;

FIG. 7 is a sectional view taken along line BB of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rubber roller 2 Core metal 4 Unvulcanized rubber roller 5 Vulcanization molding die 5a Through hole 6 Lid member (flange member) 7 Unvulcanized rubber part 11 Molding machine of unvulcanized rubber roller 16 Guide groove 21 Mold support groove 31 Roller insertion means 32 Movable member 41 Mold support release means 42 Elevating member 42b Tapered surface

Claims (5)

[Claims] 1. An unvulcanized rubber roller comprising a core metal provided with a cylindrical unvulcanized rubber portion, and flange members having a diameter larger than the unvulcanized rubber portion attached to both ends of the core metal. A mold groove of an unvulcanized rubber roller inserted into a through hole of a cylindrical vulcanization molding die, wherein the guide groove supports the unvulcanized rubber roller movably in a specific direction; , The vulcanization mold,
A mold supporting groove for supporting the center line of the through hole so as to coincide with the center line of the unvulcanized rubber roller mounted on the guide groove; and a movable member movable along the guide groove. ,
A roller inserting means for pressing the unvulcanized rubber roller placed in the guide groove from one end side of the movable member and inserting the unvulcanized rubber roller into the through hole of the vulcanization molding die. Die-type machine. 2. The unvulcanized rubber roller mold according to claim 1, wherein the mold support groove has a bottom surface lower than a bottom surface of the guide groove by a height corresponding to a thickness of the vulcanization mold. Knitting machine. 3. The unvulcanized rubber roller mold assembly machine according to claim 1, wherein the guide groove has a groove surface formed of a synthetic resin having a small coefficient of friction. 4. The apparatus according to claim 1, further comprising an elevating member capable of elevating and lowering the elevating member to release the support of the vulcanization molding die by the die supporting groove. 4. A mold assembly machine for an unvulcanized rubber roller according to any one of 3. 5. The unvulcanized rubber roller mold assembly machine according to claim 1, wherein an upper surface of the lifting member is formed as a tapered surface.