KR200311738Y1 - Ferrule manufacturing Mold - Google Patents

Abstract

Disclosed is a mold for manufacturing a ferrule for injection molding a ferrule for an optical connector.

Conventionally, as the cavity is directly formed on the upper plate and the lower plate, there are problems such as deterioration of precision, shortening of the life of the mold, and low yield of ferrules. To solve this problem, a core part having a cavity for forming a product and In the mold for manufacturing ferrules with the upper plate and the lower plate having the core portion, the core portion 40 is on the opposite side of the upper core 41 and the upper core 41 having the inclined guide portion 41a. A mold for manufacturing a ferrule is provided, characterized in that a plurality of lower cores 42 having an inclined guide portion 42a positioned and guided to the inclined guide portion 41a are arranged.

Therefore, as the core parts forming the cavity are radially formed in the upper and lower plates, respectively, the cost is reduced and the operation is easy when the mold is repaired and replaced, and the ejector is fixed while the pin catcher is fixed when the molded product is taken out. The extraction is performed by the operation of the pin, and the precision is improved. As the notch is formed between the runner and the ferrule of the molded product, damage is minimized when cutting the ferrule, thereby increasing the yield and reducing the cost.

Description

Ferrule manufacturing Mold {Ferrule manufacturing Mold}

The present invention relates to a mold for manufacturing ferrules, and more particularly, to a mold for manufacturing ferrules for molding a ferrule applied to an optical connector or the like.

In general, optical fiber is applied to a cable for transmitting or reflecting a signal light of an optical communication device or an optical measurement device, which is used by coupling an optical connector to the end of the cable for connection between the device or each device. The optical fibers are connected to each other by a cylindrical ferrule inserted into the optical connector.

In order to fix the optical fiber, such a ferrule is required to have high dimensional accuracy such as micropores and outer diameters formed at the center thereof, and as a molding material for producing the ferrule, for example, zirconium oxide is used, and is generally manufactured by an extrusion molding method or an injection molding method. do.

The manufactured ferrule is made of fine holes and outer diameters are precisely processed by polishing, and one end of the processed ferrule is equipped with a stainless flange.

Conventionally, the injection mold for manufacturing such a ferrule is coupled to the upper plate 10 and the lower plate 11 so as to be separated from each other, as shown in Figure 1, the lower plate 11 is a product (W) A plurality of cavities (C) to be formed are formed, the upper pin 10 is coupled to the core pin 12, the lower plate 11 is coupled to the pin catcher 13, the upper plate Guide pins 14 fixed to 10 are slided in the bush 15 fixed to the lower plate 11 so as to be coupled or separated at the correct position.

When the molding of the product W is completed, as shown in FIG. 2, a plurality of eject pins 16 and 17 operate together with the pin catcher 13 to take out the product W while the mold is open. I'm trying to.

In addition, the molded product W is thus formed as shown in Figure 3, the runner (R) and the ferrule (F) is integrally molded, and then cut the runner (R) and the ferrule (F) as shown in Figure 4 The cutting surface 18 as described above obtains the ferrule F formed at one end and is subjected to processing such as polishing.

However, such a conventional mold for manufacturing ferrules has a plurality of cavities (C) formed in the lower plate 11, the precision is lowered due to the machining error generated during the mold processing, it is configured to slide the pin catcher (13) Concentricity precision of the ferrule (F) is reduced by the gap generated as a result, there are a number of problems, such as the mold is easily worn and the life is shortened as the pin catcher 13 repeatedly slides.

In addition, since the molded product W does not have a separate notch, after cutting the runner R and the ferrule F, the cut surface of the ferrule F is severely damaged and the yield is lowered, thereby increasing the cost. Problems that act as factors are also inherent.

The present invention has been devised to solve the above problems, the object of the present invention is to improve the precision of the molded ferrule, to facilitate the replacement and repair of the mold and at the same time to extend the life, and to increase the yield cost To provide a mold for manufacturing ferrules can be reduced.

1 to 4 is a view showing a conventional mold for manufacturing ferrules,

1 is a partial cross-sectional view showing the main portion of a conventional mold.

2 is a partial cross-sectional view showing a state of taking out a molded product from a conventional mold.

3 is a cross-sectional view showing a product molded in a conventional mold.

4 is a cross-sectional view showing a state in which a ferrule is cut from a product molded in a conventional mold.

5 to 9 is a view showing a mold for producing a ferrule according to the present invention,

5 is an overall cross-sectional view showing a mold for producing a ferrule according to the present invention.

Figure 6 is a plan view showing a mold for producing ferrules according to the present invention.

Figure 7 is a partial cross-sectional view showing the main portion in the mold for producing ferrules according to the present invention.

8 is a cross-sectional view showing a state of taking out the molded product from the mold for producing ferrules according to the present invention.

9 is a cross-sectional view showing a product molded in a mold for producing ferrules according to the present invention.

10 is a cross-sectional view showing a cutting state of the ferrule molded in the mold for producing ferrules according to the present invention.

Explanation of symbols on the main parts of the drawings

23: Senate 24: House of Representatives

40: core portion 41: upper core

41a, 42a: inclined guide 42: lower core

43: core pin 44: core pin fixing plate

45: pincatcher C: cavity

W: Product

The mold for manufacturing a ferrule according to the present invention for achieving the object as described above, in the manufacturing mold of the ferrule provided with a core portion formed with a cavity for forming a product, the upper plate and the lower plate having the core portion, the core portion An upper core having an inclined guide portion and a lower core having an inclined guide portion positioned on an opposite side of the upper core and guided to the inclined guide portion are arranged in a plurality.

Therefore, according to the present invention, since the core portions forming the cavity are radially formed in the upper and lower plates, respectively, the cost is reduced and the work is easy when the mold is repaired and replaced, and the pin catcher is fixed when the molded product is taken out. When the ejection is performed by the eject pin in the closed state, the precision is improved, and the notch portion is formed between the runner and the ferrule of the molded product, thereby minimizing damage during cutting of the ferrule, thereby increasing the yield and significantly reducing the cost. Will be.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the present invention will be described in more detail.

5 is an overall longitudinal cross-sectional view showing a mold for manufacturing a ferrule according to the present invention, in which the locating ring 21 and the sprue bush 22, in which a molding material is supplied, are coupled to the upper fixing plate 20, The upper plate 23 is fixed to the lower side of the fixed plate 20.

A lower plate 24 is positioned below the upper plate 23, a support plate 25 is coupled to the lower side of the lower plate 24, and a space block 26 is disposed below the support plate 25. The fixing plate 27 is fixedly installed.

The upper plate 23 and the lower plate 24 are separated from each other after the molding of the product to be able to take out the product.

The upper plate 23 and the lower plate 24 are provided with a core portion 40 for molding the product (W).

As shown in Fig. 6, a plurality of the core portions 40 are formed radially so that a plurality of products W can be molded at one time.

As shown in FIG. 7, the core part 40 has an upper core 41 fixed to the upper plate 23 and a lower plate so as to form a cavity C facing the lower side of the upper core 41. It consists of a lower core 42 fixed to the (24).

Further, when the upper core 41 and the lower core 42 are coupled, the inclined guide portions 41a and 42a are formed to guide each other.

In addition, the upper core 41 is equipped with a core pin fixing plate 44 for fixing the core pin 43 to form a fine hole in the molded ferrule (F), the lower core 42 is equipped with a cavity A pin catcher 45 forming (C) is mounted, and a pinned shaft 46 is located inside the pin catcher 45.

Eject plates 28 and 29 are installed on the fixing plate 27, and the center pins 30 and the plurality of eject pins 31 and 31a are respectively fixed to the eject plate 28. It is.

In addition, a cooling water supply passage 32 for supplying cooling water to the core part 40 is formed in the support plate 25, and a guide pin 33 is fixed to the upper plate 23, and a lower side thereof is provided. The lower plate 24 is fixed to the bush 34 is inserted into the guide pin 33.

The mold for manufacturing a ferrule according to the present invention configured as described above has a plurality of core portions 40 formed radially through a gate (not shown) when a molding material is supplied through a sprue bush 22 in a state of being coupled to an injection machine. It is supplied inward of.

That is, when the molding material flows into the cavity C formed between the upper core 41 and the lower core 42, the molding of the product W is performed.

At this time, the core pin 43 is supported by the pin catcher 45 and the pin fixing shaft 46 are installed oppositely to form a fine hole, the cavity (C) by the cooling water supplied through the cooling water supply passage (32) When the product W filled in the C) is cooled and solidified, the upper plate 23 and the lower plate 24 are opened.

When the upper plate 23 and the lower plate 24 are opened, as shown in FIG. 8, only the eject pins 31 and 31a are advanced while the pin catcher 45 is fixed so that the product in the cavity C Injection molding is completed by taking out W).

As shown in FIG. 9, the extracted product W is formed by notch portion N formed at the boundary between runner R and ferrule F, thereby holding runner R and cutting ferrule F. As shown in FIG. 10, the cutting is performed without damaging the ferrule F, and then, such as grinding is performed, thereby increasing the yield of the ferrule F. FIG.

In addition, when the upper plate 23 and the lower plate 24 are closed again after the product W is taken out, the upper core 41 and the lower core 42 of the core part 40 are also coupled to each other. Both the inclined guide portions 41a and 42a formed to face each other on the upper core 41 and the lower core 42 guide each other so that the coupling is smoothly performed during the coupling operation and further improved precision after the coupling. Done.

The present invention as described above is not limited to the specific embodiments described above, anyone of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims can be variously modified. will be.

Therefore, according to the present invention, since the core portions forming the cavity are radially formed in the upper and lower plates, respectively, the cost is reduced and the work is easy when the mold is repaired and replaced, and the pin catcher is fixed when the molded product is taken out. When the ejection is performed by the eject pin in the closed state, the precision is improved, and the notch portion is formed between the runner and the ferrule of the molded product, thereby minimizing damage during cutting of the ferrule, thereby increasing the yield and reducing the cost. There are several effects.

Claims (4)

In the mold for ferrule manufacturing provided with the core part in which the cavity which shape | molds a product, and the upper plate and the lower plate which have the said core part were provided, The core portion 40 is an upper core 41 having an inclined guide portion 41a, and an inclined guide portion 42a which is located on an opposite side of the upper core 41 and guided to the inclined guide portion 41a. Mold for ferrule manufacturing, characterized in that the lower core (42) having a plurality is arranged alone. The method of claim 1, Core pin (43) is fixed to the upper core 41, the pin catcher (45) for supporting the core pin 43 is fixed to the lower core (42), characterized in that the mold fixed. The method of claim 2, The core pin 43 is a mold for manufacturing ferrules, characterized in that fixed by the core pin fixing plate 44 coupled to the upper core (41). delete