JPH0629816U - Misalignment prevention structure for molding dies - Google Patents

Abstract

(57) [Summary] [Purpose] A structure for preventing misalignment of a molding die, in which a molding object is formed by combining a die including an upper die and a lower die. Further, the upper die and the lower die are reliably aligned with each other without damaging the inlay guide or the inlay fitting portion. In addition, the structure for alignment can be made small, the mold can be made small, and the area of the molding portion of the target molding can be made large. [Structure] A spigot guide 18 is projected to one of the upper die 11 and the lower die 12, and a guide pin 22 is projected outward of the spigot guide 18 on the projecting side of the spigot guide 18. Further, the guide pin 2 is provided on the other of the upper die 11 and the lower die 12.
A guide port 31 through which the 2 is inserted is formed on the inner circumference of the spigot fitting part 32.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a misalignment prevention structure for a molding die, which is formed by combining a molding object such as a diaphragm with a mold including an upper mold and a lower mold.

[0002]

[Prior art]

 Conventionally, it has been practiced to mold a target molded product by combining a plurality of molds such as an upper mold and a lower mold. Molding using dies such as the upper mold and lower mold will cause deformation of the target molded product or molding if the combination is not performed while the positions are surely matched. However, there is a problem that the thickness is not uniform.

Therefore, conventionally, a guide pin is provided on one side of the mold, a guide port for inserting the guide pin is provided on the other side, and the guide pin is inserted into the guide port, so that the upper die, the lower die, etc. The mold is aligned.

Further, in the above-described method of combining the guide pin and the guide port, it is not always possible to accurately align the molds. Therefore, it is necessary to fit a plurality of molds using the pilot guide. Is being done. In this spigot fitting, there is an advantage that the upper and lower molds are not displaced and a reliable alignment can be performed.

Further, in order to further ensure the certainty of alignment, as shown in FIG. 3, a guide pin (1), a spigot guide (2) and the like are separately provided in one mold (3). Things exist.

[0006]

[Problems to be solved by the device]

 However, in the case where the guide pin and the guide port are provided, the guide pin is formed to be slightly thinner than the diameter of the guide port, and it is easy to align a plurality of molds such as the upper mold and the lower mold. I am able to do it. Since the guide pin and guide opening are formed slightly smaller than the guide opening, the guide pin and guide opening can be adjusted even if there is some misalignment when fitting the upper die and the lower die. Can be mated. Therefore, it has the advantage of facilitating the adjustment of the alignment between the upper die and the lower die, but on the other hand, it is not always possible to align the upper die and the lower die securely, and there is a deviation in the wall thickness of the object to be formed. And so on, which is not always preferable.

[0007] Although the spigot fitting method has an advantage that the upper die and the lower die are surely aligned with each other, the positions of the upper die and the lower die are surely adjusted before they are fitted together. Otherwise, when the upper and lower dies are fitted together, the upper and lower dies can be fitted together if the spigot-fitting inlay guide and the lower fitting part are slightly misaligned. There was a possibility that it would become difficult or the spigot guide that could not be fitted would collide with the spigot fitting part, resulting in damage.

Further, in order to eliminate such a defect, as shown in FIG. 3, there is a mold (3) in which both the inlay guide (2) and the guide pin (1) are separately formed. In the case of this method, the guide pin (1) is formed with a diameter smaller than that of the guide port into which it is inserted and fitted, so that the guide pin (1) can be loosely fitted into the guide port. Therefore, even when the upper die and the lower die of the mold (3) are set with their positions slightly displaced, the guide pins (1) can guide the positions to almost correct positions. Then, the guide pin (1) guides the upper and lower molds (3) into a substantially aligned state, and then the spigot fitting is performed at the final fitting stage of the mold (3). As a result, the spigot guide (2) may not be fitted, or the spigot guide (2) and the mating part may be damaged due to inadvertent impact on the mating part of the spigot guide (2). Absent.

However, as shown in FIG. 3, the conventional guide pin (1) and the spigot guide (2) are separately formed on the outer periphery of the mold making portion (4) of the mold (3). . Therefore, the proportion of the mold making part (4) in the mold (3) is reduced, the mold (3) is made larger than the mold making part (4), which is not only uneconomical but also small. It was uneconomical that many molds could not be taken from the mold (3).

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is a metal mold for molding a target molded product by combining an upper mold and a lower mold, and an inlay guide is provided on a side of a combination surface of one mold to be combined. The guide bush on the projecting side of the spigot guide, projecting outward from the projecting tip of the spigot guide, and inserting the guide pin larger than the diameter of the guide pin and gently inserting the guide pin. This guide bush is provided so as to project to the side of the mating surface with the other mold to be combined, and the spigot fitting part for fitting the spigot guide is formed at the outer peripheral position of the guide port. When performing molding using a die, after the guide pin and guide opening are loosely fitted, at least a part of the spigot guide is closely fitted to the spigot fitting part. Than it is.

[0011]

[Action]

 In the structure configured as described above, in order to perform molding using a mold composed of an upper mold and a lower mold, an unvulcanized rubber or the like to be molded in advance is positioned between the molds or the mold is A method of injecting a molding material between the molds after fitting can be used.

When the upper die and the lower die are brought close to each other in the fitting of this die, the guide pin projects outward from the spigot guide, so that this guide pin is provided on the other die. First inserted into the id mouth. Since this guide port is formed with a diameter larger than the diameter of the guide pin, the guide pin is inserted into the guide port even when the positions of the upper die and the lower die are slightly displaced, and It is possible to guide the lower mold to almost the correct position. Then, when the guide pin is further inserted into the guide port, the spigot guide of the guide bush is fitted to the spigot fitting portion.

Since the spigot fitting is performed after the approximate position is determined by the guide pin, the spigot fitting becomes impossible, or an inadvertent impact is partially applied during the spigot fitting. Therefore, the spigot guide or the spigot fitting part is not damaged, and the secure spigot fitting can be performed without any danger. Then, since the spigot fitting part is brought into close contact with the spigot guide, the alignment between the upper die and the lower die is surely performed. Therefore, the thickness of the object to be molded does not become uneven and molding failure does not occur.

Further, since the guide pin and the spigot guide are formed on the same bush, they do not occupy many places on the die. That is, since the guide bush has the spigot fitting part formed on the outer periphery of the guide port and the spigot guide is formed on the outer periphery of the guide pin, the spigot guide and the guide pin are separately formed as in the conventional case. It can be made to occupy a very small area in comparison with the one. This reduced occupying area can be used for making the mold smaller and for making a mold for the target molding.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. (10) is a mold, which is composed of an upper mold (11) and a lower mold (12), and these are combined to form a target molded product. To do. In addition, this upper mold (11) is formed by fixing the upper mold member (17) provided with the mold making portion (14) to the upper mold substrate (13) with the fixing bolt (15). There is. Further, the upper die guide bush (16) is fixed to the upper die substrate (13) via fixing bolts (15).

The upper die guide bush (16) has a spigot guide (18) protruding toward the lower die (12) of the central portion. This spigot guide (18) is formed in an annular shape, the outer circumference is formed as a slightly tapered taper surface (20), and the inner circumference is formed as a circular recess (21). A guide pin (22) is axially projected in the center of the circular recess (21). The guide pin (22) protrudes to the shaft center of the upper guide bush (16) and further protrudes further outward than the outer end of the spigot guide (18). Although this protrusion length can be arbitrarily determined, it is preferably determined in consideration of the protrusion length of the inlay guide 18 or the height of the product cavity.

The lower mold (12) is formed by fixing the lower mold member (25) provided with the molding part (24) to the lower mold substrate (27) with a fixing bolt (26). ing. Further, a lower die guide bush (30) is fixed to the lower die substrate (27) via a fixing bolt (28).

A guide port (31) having a diameter larger than that of the guide pin (22) and allowing the guide pin (22) to be gently inserted is passed through the lower guide bush (30). . A spigot fitting portion (32) for closely fitting the spigot guide (18) is provided at the outer peripheral position of the guide opening (31).

The close fitting of the spigot fitting part (32) and the spigot guide (18) does not necessarily require that the entire fitting part be closely fitted, and for example, a taper provided on the outer periphery of the spigot guide (18). Only the surface (20) may be in close contact with the receiving taper surface (33) provided on the inner circumference of the spigot fitting part (32).

In the structure configured as described above, when the upper mold (11) and the lower mold (12) are fitted to each other to form a target molded product, the upper mold (11) and the lower mold are After inserting an unvulcanized rubber between (12), the upper mold (11) and the lower mold (12) are press-fitted.

In this press fitting, first, the guide pin (22) is inserted into the guide port (31). Since the guide pin (22) has a smaller diameter than the guide port (31), the upper die (11) and the lower die (12) are set in a position slightly displaced from each other in the press machine. However, the guide pin (22) can be fitted into the guide port (31) and the upper die (11) and the lower die (12) can be guided to substantially correct positions. Then, the guide pin (22) and the guide port (31) guide the lead in advance, so that the spigot guide (18) is fitted into the spigot fitting portion (32).

Since the guide pin (22) and the guide port (31) guide the pilot guide (18) and the pilot fitting part (32), the pilot guide (18) and the pilot fitting part (32) are guided. No. 32) does not result in unfitting or a strong impact on a specific portion resulting from the shift of the fitting position, and a reliable and intimate close fitting can be performed.

Further, since the conventional guide pin (1) and the spigot guide (2) shown in FIG. 3 are formed separately in the mold (3), the area of the mold making part (4) is smaller than that of the mold making part (4). However, it had the drawback of increasing the area of the mold (3). However, in the present invention, the spigot guide (18) and the guide pin (22) are formed as one, so that when the mold (10) having the same area as that of the conventional case is used, the mold take-up portion is used. Since the area of (14) can be taken up a lot, an economical and efficient mold (10) can be obtained.

[0024]

[Effect of device]

 Since the present invention is configured as described above, the spigot guide or the spigot fitting part is not damaged, and reliable spigot fitting can be performed without any danger. Positioning with the lower mold can be performed reliably, and the quality of the molding target can be improved.

Further, since the guide pin and the spigot guide, and the guide port and the spigot fitting part are formed on the same bush, the area occupied by the guide pin and the guide pin is larger than that of the case where the spigot guide and the guide pin are formed separately. It is possible to reduce the number of molds, reduce the size of the mold, and increase the area of the molding part of the target molding, which is economical.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention.

FIG. 2 is an overall plan view of an upper die.

FIG. 3 is a plan view of a mold showing a conventional example.

[Explanation of symbols]

 10 Mold 11 Upper Mold 12 Lower Mold 16 Upper Mold Guide Bushing 18 Inlay Guide 22 Guide Pin 30 Lower Mold Bushing 31 Guide Port 32 Inlay Fitting Part

Claims (1)

[Scope of utility model registration request] 1. A mold for molding a target molded product by combining an upper mold and a lower mold, wherein a spigot guide is projected on a mating surface side of one mold to be combined and On the projecting side, project the guide pin to the outside of the projecting tip of the spigot guide. In order to perform molding using a mold, the spigot fitting part that fits the spigot guide in the spigot fitting is formed at the outer peripheral position of the guide port, while it is provided so as to project to the side of the mating surface with the other mold to be combined. In the core of the molding die, the guide pin and the guide port are loosely fitted and then at least a part of the spigot guide is closely fitted to the spigot fitting part. Deviation prevention structure.