JPH06207674A - Blast peel-off type masking - Google Patents

Abstract

PURPOSE:To provide a blast peel-off type masking which can prevent build-up of abradant thereon when a film applied over a metal gasket member is partially peeled off by blasting, and which can reduce an abrasion rate of the abradant, and which can eliminate or reduce the necessity of a facility for collecting the abradant while the film is surely peeled off by blasting. CONSTITUTION:A peel-off opening 8 and an opening formed in a cope 2 are tapered so as to be opened to the joint surface side for a metal gasket member 1, with dimensions and a shape substantially equal to those of a part to be peeled off, and to be opened to the opposite surface side with dimensions and a shape greater than that of the same. A female die 3 is arranged so that it is made into contact with and to support several parts excepting several different holes formed in the metal gasket member 1. Alternatively, it is arranged so that the metal gasket member 1 is supported on a perforated member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masking used for partially peeling a coating applied to a metal gasket member by blast peeling, and particularly proposed by the present applicant in Japanese Patent Application No. 4-310769. The present invention relates to a masking suitable for blast peeling in which a synthetic resin abrasive is sprayed on a masked metal gasket member to peel off a coating film.

[0002]

2. Description of the Related Art As means for partially peeling off a coating applied to a metal gasket member, as in Japanese Patent Publication No. 4-21065, the metal gasket member should be covered and peeled except for the portion to be peeled off. A water jet peeling means for jetting ultra-high pressure water along a portion to peel off the coating film has been proposed. On the other hand, the applicant of the present invention has devised the invention of the above-mentioned patent application as a means for shortening the peeling processing time.

However, in the case of the blast peeling, a problem caused by the abrasive which has not been a problem in the water jet peeling, that is, the abrasive is transferred to the next step while being accumulated on the masking, so that the uncollected abrasive is In addition to increasing the wear rate and requiring equipment for collecting the abrasive, the abrasive accumulated on the mask could enter the peeling opening and hinder the peeling of the coating. . In addition, the occurrence rate of distortion deformation of the masking due to the collision of the abrasives is large, and the life of the masking is shortened.

[0004]

DISCLOSURE OF THE INVENTION The present invention can prevent the polishing material from accumulating on the masking as much as possible, reduce the wear rate of the polishing material, and make the equipment for collecting the polishing material useless or downsized. It is intended to provide a blast peeling masking which can be peeled off by blast peeling and can be surely peeled off.

[0005]

A mask for blast peeling according to the present invention is provided with a peeling opening corresponding to a predetermined portion of a coating applied to a metal gasket member to be peeled and various holes formed in the metal gasket member. And an receiving die for holding the metal gasket member between the upper die and the upper die.

At least the peeling opening formed in the upper mold has a size and shape equivalent to the portion to be peeled on the joint surface side with the metal gasket member and is larger than the portion to be peeled on the facing surface side. Tapered to open. The upper mold may be composed of a plate having an opening having the same size and shape as the portion to be peeled off, and a reinforcing rib provided on the periphery of the plate.

The receiving mold includes a frame forming four circumferences, a support member for contacting and supporting a portion other than various holes formed in the metal gasket member, and a bridge member for connecting the frame and the support member. It can also consist of The receiving mold may also be composed of a frame forming four rounds and a perforated member extended in the frame.

When the portion to be peeled off is a water hole region formed so as to entirely surround the bore hole of the metal gasket member, the upper mold has an inner peripheral edge of the bore hole and an inner peripheral edge of the water hole region. A core plate formed to cover the space, a support plate formed to cover the outer periphery of the water hole region from the outer peripheral edge, and a water hole formed to connect the core plate and the support plate. The bridge member may be provided at the position of the water hole in the area. Further, the support member may be formed so as to support a portion between the inner peripheral edge of the bore hole and the inner peripheral edge of the water hole region.

[0009]

[Function] Since the peeling opening is the same opening as the portion to be peeled at the joint surface portion with the metal gasket member,
Make sure to perform the peeling along the part to be peeled. On the other hand, since the opening on the opposing surface side is tapered, the abrasive can surely reach the coating film even if a deviation occurs between the axial direction of the opening and the spraying direction of the abrasive.

As a result, the peeling opening can be deeply formed, and the upper die can be made of a thick plate member so as to enhance the rigidity and prevent the strain deformation. On the other hand, the tapered opening reduces the substantial depth of the stripping opening to prevent the abrasive from accumulating within the stripping opening. Further, the rigidity of the upper mold is also increased by the reinforcing ribs provided on the peripheral edge of the plate, and the distortion deformation of the upper mold due to the abrasive is prevented.

The portion supporting the receiving type metal gasket member does not exist at the position of the opening of the upper die and the hole of the metal gasket member, and the abrasive passing through these openings and holes passes downward as it is, Prevents the polishing material from accumulating on the masking.

When the portion to be peeled is a water hole region formed so as to entirely surround the bore hole of the metal gasket member, the opening corresponding to the bore hole formed in the core plate and the supporting member is peeled. It is a relatively large opening close to the work opening, and more than fully functions as an opening for escape of the abrasive. Further, the bridging member is provided at the position of the water hole in the water hole area to prevent it from interfering with the sprayed abrasive.

[0013]

EXAMPLE As shown in FIG. 1, a mask for blast peeling according to an example of the present invention is provided between an upper mold 2 and an upper mold 2 formed so as to cover a predetermined portion of a metal gasket member 1. It is composed of a receiving die 3 for holding the metal gasket member 1.

The gasket member 1, as shown in FIG.
It has a plane shape suitable for a required flange surface having various holes such as the bore hole 4 and the water hole 5, and a coating 6 is applied to the surface thereof. As will be described later, the coating film 6 is peeled off at a required portion (in the illustrated case, a water hole region 7 formed so as to entirely surround the bore hole 4) by blast peeling by spraying an abrasive. It

The upper mold 2 has a peeling opening 8 corresponding to the portion of the metal gasket member to be peeled off and an opening 9 corresponding to various holes formed in the metal gasket member.
In the illustrated case, the peeling opening 8 is formed from the core plate 10 formed so as to cover between the inner peripheral edge of the bore hole 4 and the inner peripheral edge of the water hole area 7, and the outer peripheral edge of the water hole area 7. The opening 9 is formed between the core plate 10 and the support plate 11 formed so as to cover the outer portion.
Respectively formed inside. The core plate 10 and the support plate 11 are connected to each other by a bridging member 12,
The bridging member 12 is arranged in a position corresponding to the water hole 5 in which the peeling of the coating is not necessary in the water hole region.

As shown in FIG. 2, the peeling opening 8 is equivalent to the portion to be peeled on the joint surface side with the metal gasket member 1 in order to prevent the coating on the inner peripheral edge portion of the bore hole from being peeled off. Alternatively, the opening is formed with a slightly small size and shape, while the opposite surface side is tapered so as to be opened with a size and size appropriately larger than the portion to be separated. Also,
It is desirable that the opening 9 is also a tapered opening like the peeling opening 8. By forming the peeling opening 8 in such a tapered opening, even if a deviation occurs between the jet direction D of the abrasive and the opening axial direction A of the peeling opening 8, the abrasive is The coating located at the bottom of the stripping opening 8 can be reached.

Here, in order to more effectively prevent the polishing material from staying on the upper die, the opening peripheral edge on the large size side of the opening 9 is opened at another opening 9 or the opening on the large size side of the peeling opening 8. It is also possible to form the inclined surfaces in a continuous manner so as to be overlapped with the peripheral edge and to form the entire upper surface of the upper mold 2 with the surfaces inclined in any direction.

Further, in order to prevent the upper mold 2 from being distorted and deformed by the sprayed abrasive, a member having a relatively thick plate is applied to increase the rigidity of the upper mold 2. As another means for increasing the rigidity of the upper mold 2, as shown in FIG. 3, the core plate 10 and the support plate 11 are made of a member having a relatively thin plate thickness or a normal plate thickness, and the support plate is formed. It can also be achieved by disposing reinforcing ribs 13 around 11. In this case, the peeling openings 8 and 9 may be formed in a simple opening shape corresponding to the portion to be peeled.

The reinforcing ribs 13 may be provided on any surface side of the support plate 11, but when they are provided on the side of the receiving die 3 which is in contact with the receiving die 3, the reinforcing ribs 13 abut the receiving die 3 and receive the upper die 2. Care should be taken not to disturb the joint relationship with the mold 3, for example, the reinforcing ribs 13 are provided so as to surround the outer peripheral edge of the support plate 11, and the upper mold 2 is attached to the box lid. You may form in such a shape. When it is provided on the facing surface side, the escape passage for the abrasive should be secured so that the abrasive injected by the reinforcing ribs 13 does not stay on the upper mold 2.

The receiving mold 3 has a frame 14 forming four rounds.
A support member 15 for contacting and supporting a portion other than various holes formed in the metal gasket member 1, and a bridging member 16 for connecting the frame 14 and the support member 15.
Composed of and.

The frame 14 is formed so as to support the outer peripheral edge portion of the metal gasket member 1, and the support member 15
Is the inner peripheral edge of the bore hole 4 of the metal gasket member and the water hole region 7
Is formed so as to support a portion between the inner peripheral edge and.
The peripheral edge of the support member 15 on the side of the bore hole 4 is appropriately larger than the inner peripheral edge of the bore hole 4 so as not to hinder the movement of the abrasive passing through the bore hole 4. Forming the peripheral edge of the support member on the bore hole side larger than the bore hole is usually
It provides a space for a bead (not shown) formed around the bore of the metal gasket member 1 to be located. As a result, it is possible to prevent the beads from being scraped during the peeling work. Further, it is possible to prevent an unnecessary gap from being generated between the upper die and the receiving die due to the interposition of the bead, and to prevent the shape of the portion peeled off by the blast from becoming irritated.

In other words, the receiving die 3 prevents the polishing material passing through the upper die 2 and the metal gasket member 1 from passing through the receiving die 3 as it is and being recovered by the hopper 17 (see FIG. 4). Formed so that there is no. Therefore, as shown in FIG. 5, the receiving mold 3 is configured to extend the perforated member 18 in the frame 14 to support the metal gasket member 1 to allow passage of the abrasive and to be used for general purposes. Form a receiving mold with a certain nature.

In the illustrated case, the perforating member 18 is a plate-shaped material in which thin plate members are combined in a lattice shape, but is not limited to this, and a punching plate, a mesh,
Alternatively, any other suitable perforated material could be used.

[0024]

According to the present invention, the upper die 2 has the openings 9 at positions corresponding to various holes of the metal gasket member 1, and the receiving die 3 passes through the upper die 2 and the metal gasket member 1. Since it does not hinder passage of the abrasive, the abrasive sprayed on the masking does not accumulate on it, thereby avoiding an increase in the wear rate due to the abrasive being carried to the next step, and The recovery equipment provided for recovering the abrasive can be eliminated or the capacity can be reduced.

Further, by forming the peeling openings 8 and 9 in tapered openings, it is possible to prevent the polishing material from accumulating on the upper mold, and the spraying direction of the polishing material is such that the polishing material is sprayed in the direction of the peeling opening 8. Even if there is a deviation in the direction of the opening axis, the abrasive can surely reach the coating, so that the coating can be reliably peeled by blast peeling.

Furthermore, the rigidity of the upper die can be increased by using an upper die having a thick plate thickness by using a tapered opening, or by adopting reinforcing ribs 13 on the upper die, so that the polishing to be sprayed is performed. It is possible to prevent strain deformation due to the material, and it is possible to obtain masking with high durability.

In addition, when the portion to be peeled off is the water hole region 7 formed so as to entirely surround the bore hole 4 of the metal gasket member, the core plate 10 and the support plate 11 are connected to each other. Since the bridging member 12 to be provided is provided at the position of the water hole 5 in the water hole region which does not require peeling of the coating,
It is possible to form the peeling opening 8 between the core plate and the support plate without damaging the predetermined peeling of the coating.

Further, the perforating member 18 is provided in the receiving type supporting member.
By using, it can be used regardless of the shape of the metal gasket member, and the receiving mold can be made versatile.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment according to the present invention.

FIG. 2 is an enlarged partial sectional view showing an upper die according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a modified example of the upper mold according to the embodiment of the present invention.

FIG. 4 is a schematic view showing a peeling work state according to an embodiment of the present invention.

FIG. 5 is a perspective view showing a modification of the receiving mold according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal gasket member 2 Upper mold 3 Receiving mold 7 Water hole area 8 Peeling opening 10 Core plate 11 Support plate 12 Cross-linking member 13 Reinforcing rib 14 Frame 15 Supporting member 16 Cross-linking member 18 Drilling member

Claims (6)

[Claims] 1. An upper mold having a peeling opening corresponding to a predetermined portion of a coating applied to a metal gasket member to be peeled and openings corresponding to various holes formed in the metal gasket member, and an upper mold. And a receiving die for holding the metal gasket member between the metal gasket member and the metal die, and at least the peeling opening formed in the upper die has the same size and shape as the portion to be peeled on the joint surface side with the metal gasket member. A mask for blast peeling, which is characterized in that it is tapered so as to open in a size and shape larger than a portion to be peeled on the opposite surface side. 2. An upper die having an opening for peeling corresponding to a predetermined portion of the coating applied to the metal gasket member to be peeled and openings corresponding to various holes formed in the metal gasket member, and an upper die. And a receiving die for holding the metal gasket member between the upper die and the upper die. The upper die is composed of a plate having an opening having the same size and shape as the portion to be peeled off, and a reinforcing rib provided on the periphery of the plate. Mask for blast peeling characterized by 3. The portion to be peeled off is a water hole region formed so as to entirely surround the bore hole of the metal gasket member, and the upper die has an inner peripheral edge of the bore hole and an inner peripheral edge of the water hole region. Core plate formed so as to cover the space between the core plate, the support plate formed so as to cover the outer periphery of the water hole region from the outer periphery, and the water for connecting the core plate and the support plate. The blast peeling masking according to claim 1 or 2, comprising a bridging member provided at the position of the water hole in the hole region. 4. An upper mold having an opening for peeling corresponding to a predetermined portion of the coating applied to the metal gasket member to be peeled and openings corresponding to various holes formed in the metal gasket member, and an upper mold. And a receiving die for holding the metal gasket member between the receiving die and the frame. The receiving die has a frame forming four circumferences and a portion for abutting and supporting a portion other than various holes formed in the metal gasket member. A blast peeling masking comprising a support member and a bridging member for connecting the frame and the support member. 5. The portion to be peeled off is a water hole region formed so as to entirely surround the bore hole of the metal gasket member, and the support member is formed on the inner peripheral edge of the bore hole and the inner peripheral edge of the water hole region. The blast peeling masking according to claim 4, wherein the masking is formed so as to support a portion between them. 6. An upper die having an opening for peeling corresponding to a predetermined portion of the coating applied to the metal gasket member to be peeled and openings corresponding to various holes formed in the metal gasket member, and an upper die. And a receiving die for holding a metal gasket member between the receiving die and the receiving die. The receiving die is composed of a frame forming four circumferences and a perforated member extended in the frame, and blast peeling. For masking.