JPS58157529A - Core die for forming bent tube - Google Patents

Abstract

PURPOSE:To obtain a bent tube having true circular bent part and obtain an easily separable core die by specifying position of dividing of core die of bent part, enabling movement of an inner periphery core die along an outer periphery core die, and connecting these specially to faucet and straightpart core die. CONSTITUTION:For instance, a core die 9 for forming a one side receiving, one side inserting joint bent tube 16 is cut crosswise on a radius line formed by connecting centers of curvature 7a, 8a of inner and outer circumferences 7, 8 and extending it, and constituted of inner and outer periphery core dies 11, 10 divided by circular arc face with its center at 8a. The dis 10, 11 are connected by a connecting groove provided along the divided circular arc face. The die 11 is connected to the expanded faucet or straight part core die 12, 12a giving allowance for movement so that they are linked only when pulled out to a specified position. For instance, they are connected by a connecting rod 20 pivoted by a pin shaft 21 that penetrates a slide hole 18. The die 10 is connected to the tip of an operating rod 14, and the rod 14 is connected to a proper operating device through a penetrated slide hole 14a of the die 12. The same applies for another opening side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cored metal fitting IIc for a curved pipe ISc type, and more specifically, it is curved at a predetermined arbitrary angle, and following a part of this curve, there is an enlarged diameter socket or a straight pipe in one or both sides. This is a favorite mold for forming bent pipes such as those that form a section, and is configured so that the curved section is formed into a 1tlt-perfect circular shape and can be easily removed.

For example, the curved pipe l shown in FIG. The insertion opening i is continuous with a cylindrical portion curved at an approximately right angle. Ota JI! The figure shows both joints and pipes as an example, and these sockets 4 are formed with enlarged diameter sockets such that the connecting inlet pipe 8 is equipped with a V position and the orientation angle O- absorbs 9. 4
Showing 0, inside the socket! An elastic ring b is interposed between the FTJ and the outer circumference of the inlet tube. This 4#! Depending on the piping location, piping, etc., appropriate sockets for bent pipes may be installed in a single pipe with 3 and 4 pipes or 4 pipes, so each Ik〇 pipe is manufactured according to the pipe diameter or required angle. .

By the way, in the manufacturing of this elaborate tube, injection molding is generally used to form a relatively large-diameter tube with high precision, and the outer metal layer is It is structured in the form of a fund and is used by the nine members. t
Of these gold layers, for the outer metal layer, it is sufficient to combine 8 pieces of gold that form mating directions along the tube axis direction with a metal layer that has an open end of 1**, but for the core metal layer, In order to improve the forming accuracy, the KW & Hatake means are a problem. For example, in the double joint-pipe IS as shown in Fig. 3, the center of curvature of A111 inside the curved part has been proposed. Both the outer circumferential circle line 8 and the inner circumferential circle line 7 in the same plane including the point 8m1-rate center, and the curve IIK and the extension line T of the inner circumferential circle line 7 are the sockets 11g1K
What is made of the expansion socket that does not cause a roaring sound [shown, ζO 〡 curved pipe 〇O real metal W6, the curved part core type - and the enlarged diameter socket @b, @g meeting It is composed by combining them, and when it comes to m shoes, the first thing you need to do is expand the diameter of the socket. lii nukiji (B),
Next, turn the bay part 6 insects, centering on the 龜 insects (A
), the other side enlarged diameter socket part fjJI6b can be removed by pulling it out (C). In addition, in the same case illustrated in FIG.
As in the above example, both the outer circumferential ring 8 and the inner circumferential circle 7 on the inner surface 11 of the curved part are centered at the point 8a, and the curve sK
Subsequently, an enlarged diameter socket 2.2 is formed, but the inner circumference)
T'! The radius of curvature of 1i17 is small, and the extension line of the inner circumferential circle line 7 still oscillates toward the enlarged diameter socket II, making it possible to remove the core I as in the previous example.
JJIt cannot be used.

Therefore, in such a curved pipe, the core metal oboro of the curved part is cut into rings along a line that connects the 1-rate center 81 of the inner and outer circumferential circles and the center point of the circular lines, and the inner circumferential core type 6. The outer peripheral core F6d is divided into core metal If.

For Shinkanabatake's W&Sushi configured in this way, as shown in the figure, first pull out the expanded diameter core 6C (B), then turn the outer core 6- around the point ga and pull it out. By this,
Since a space is created on the outer periphery of the inner core I5!6, the inner core 6.1 can be moved or dropped into the space as shown by the arrow, and the core m can be attached to the outside of the formed curved pipe. You can roll out 9.

However, since it is made of such a core metal, in order to remove it by moving it to the inner periphery core W6 and the outer part, the hollow space inner periphery 2 > mold 6 is used.
Of course, the movement direction of the inner peripheral core layer 6 is non-orthogonal to the center line of the curved part, so it is necessary to have a volume that allows the inner peripheral core layer 6 to easily retreat. do-
Cut l11r (2) [In order to make a perfect circle, it is necessary to correct the dividing position of the curved S core type. However, in a pipe as shown in the example of No. 61 @ IK, the 11 in the curved part The outer circumferential circle ii8 and the inner circumferential circle 7 of the surface are both centered at a point 811 of curvature, and a curved portion IIckit is formed with a long enlarged diameter socket 2 on one side and a straight pipe portion 3 on the other side.

Furthermore, the inner circle line 7 and the outer circle! The extension line of l18 is the expanded diameter socket Il! It has a shape that is in contact with the straight pipe part a direction and the straight pipe part a direction. In such a curved pipe, the method of removing the core temperature O as in the above two examples is impossible. Therefore, it is difficult to manufacture a curved pipe in the shape shown in Fig.6.

The present invention is focused on these points: The steel core has been achieved as a result of the 11lt helmet, and the core metal is improved to obtain a curved pipe with a perfectly circular curved part, and a core metal for forming a curved pipe that can be easily removed from the mold. This is what we are trying to provide. However, the material made of the core metal of the present invention is a curved S-core type inner circular cylinder, a circular line with a position nearer to the inner cylinder than the center of curvature of the outer circular line, and a circular line with L7t- in the middle of the IC curve, and these. The center of: Ayufu is cut symmetrically at the #R line, and is also divided by the outer circumferential circle line J). The mold and the outer #4 core type are formed by adding a diameter-enlarged socket core type or a straight pipe part core type [7, these inner I4 core types are each formed into an outer peripheral core type. In addition, the enlarged diameter socket Iku core type is connected to the cylindrical socket with a connecting rod that allows for movement. This type is connected to a sliding operating rod with a straight or straight S or S type.

Hereinafter, the inventive core mold for weighing will be explained in detail in #1 based on the direction, and the figure shows an example of a specific dormitory installation, and the present invention is not limited to the illustrated example, but the purpose of the above and below. It can also be applied to curved pipes with other configurations. 6th k
1 shows a joint curved pipe 1b formed using the 3-metal metal 7 of the present invention, and the socket 2 is an enlarged diameter socket 2 by Iic combination. It may be a joint curved pipe in which the exemplified backing-interposed expanded diameter socket 4 is formed on both or one side. In this case, the socket core described later may be a conventionally known core mold for forming a plate diameter socket. In the six cases, a straight pipe S [formed a friend] is attached to the curved part and connected to the
- Although water is used, it can be applied in the same way even if the socket is a bent pipe where a diameter-enlarged socket is formed immediately from the curved part. It should be noted that the core mold of the curved part and L7 are cut in circles as if arranged in an illumination manner, and in the case where the straight pipe part is subsequently formed, both are constructed symmetrically, and [S! Since the operations are performed simultaneously or alternately, the following explanation will only describe the configuration and operation of one-sided tilting as described above. At the TcO curvature center 71, there is a granite line 8 outside the tube.
It is formed closer to the inversion of the curved part on the radius of curvature than the center of curvature 8, and the inner circle line 7C and the outer circle #M
8 has a significantly smaller inner diameter at the curved portion.

However, as for L7, the inner circumferential circular line 7\r may be used as the outer mold, and the center of curvature of the outer circumferential circular line 8 may be 8m as in the past, and the inner wall of the curved portion of the curved pipe may be molded to float. , a reinforcing effect is expected. On the other hand, in the case of the M type, the core material of the present invention is placed in the cavity of the outer mold of 9 m, which is suitable for the seventh factor. Gold [19] is cut into rounds on the radius line extended by connecting the centers of curvature gm and 7ai, and further divided by arcuate surfaces with the center of curvature of the outer circumferential line as center and L), and the inner circumferential core m1ll, 11 and outer #ld core W1
0.10 facing each other, and are connected by a retaining groove provided along the divided circular arc surfaces of the outer leg core mold 10, the inner circumferential core 11ti, and the outer circumferential core 1110. FIG. 8 is a view showing the ring cutting portion of the core mold 9, excluding the other side, as seen from the direction in which the tube axis extends, and FIG. 9 is an exploded perspective view showing these structures. In these figures, the main mold s4 is Mm3F11, 11. Consists of an outer shoulder core W10.1G and a socket core 1klll12 holes connected to these,
The opening core 12 is a socket core with an expanded diameter socket core and a straight Iw part core mold 12 that is integrally formed with the socket core.
ga shows the one formed only with the socket straight tube core mold, and these socket core molds have 12° and 12-hole openings, each with a one-shot end face regulation type! 8 are arranged and configured. Then, the end face regulation al11g pressurizes the socket core molds 1'2 and the inner and outer Mxmti, t by means of operating rods 181 fixed thereto.

[The oscillation is maintained, and a round engagement step portion is formed on these core-shaped alignment teeth to engage with each other and maintain one position.

In the southern part, end face scale M type Ill, III and socket core 1nl
! , 12m are shown integrally formed.

On the other hand, the assembly of the inner peripheral core mold 11 and the outer peripheral core mold 10 is performed by the above-mentioned sliding thIK Dobzol type engagement 5ta of the outer peripheral core mold IO.
(b) and a dovetail shaped protrusion 11) are formed on the sliding surface to engage with each other, and the inner dovetail core 110 is formed on the sliding surface to engage with each other.
11 is movable in the tube axis direction along the engagement #l1Okl. In the southern case, the engagement groove 101) is the outer core type 1G@
Although these pipes are shown as being provided, they may be provided in the opposite manner, or may be provided with a plurality of grooves, or may be provided with engaging grooves of other shapes. Further, reference numerals 1111101 and 12c are the engagement step portions for holding the position, and these may be formed in the opposite direction to the illustrated direction.

Operational connection of the auxiliary inner fiber core and the outer core type lO
5. The inner peripheral core 1111 is connected to the socket core mL2, and this connecting means wire socket, 5. J
It is configured to have a movement margin such that the interlock 1 is activated only when it is pulled out to a specific position. These J)eWuJ
As a connection means to provide some margin, telescopic levers, chains, etc. are considered, but 18Hj! Conclusion 20
An example is shown in which the connecting rod is connected with a play tS between the bottle shaft t and one socket core type 12m. As shown in FIG.
, 111' (Fig. 10) tvl and 11 fitting hole 11
B, 1610-ttL It is a waste in the phase within the population axis @1111
Form 1.

- Hs material 17゜ty for these fitting holes is and t@a.
At I 41 people, the length of these cylindrical members [the length from the bottom of the fitting hole to the circumferential groove 16b, and the length of each bullet stopper ring 22.22 m 1 circumference #116
1 and fit into the cylindrical member 17, 1781 so that it does not come off.
#Hold. On the other hand, these hook members are formed into hinges that are pivoted at one end of the connecting rod 20, respectively, and are allowed to move by a specific distance on the side of the OHS material 17. That is, the chest member 1'lK is the pin shaft 21.
M's storm hole 19t-* is made, and one end hook of the connecting rod ilO is connected to the center, and the connecting rod 20 and the other 11ith! lIl is a pin shaft 21 which is formed on the plow member 17 and penetrated through the next swidth hole 18.
It is centrally supported. Note that these bottle shafts 21. The length of glm is the same as the length of the outside of the plow member and the diameter of I11, so it is 4M ring hole I@.

There is no risk of it falling out within 16a, and when assembling, first fasten the l1llllll material to the connecting rod go with the pin shaft, then insert it into the fitting hole,
At fit.

On the other hand, the outer peripheral core type 10 is connected to the tip of an operating rod 14, and this operating rod 14 is a socket core type l! It is connected to a free actuating device through a through-sliding hole 14at formed in the.

In the core metal I￥9 constructed in this square, the outer diameter F of the core-shaped round cut part of the curved part like a skin is 5611ν11.
10 straight pipes l5XI! Is! Since the mold is formed into a circular line shape with an outer diameter smaller than the depth, demolding is extremely difficult to remove, and this demolding is carried out on the next mold.

The 1st tllQ to the 1st it- show the process, and each one shows only one hook, but the other side is also frugal, and by good luck, it is the same time that the same hook is E7.
It is removed from the mold. Misakichi Figure 10 shows the operating rod 18a XM#
Arc is the socket core metal 1! In the state in which the blade 9, the inner core 11, and the outer core mold 10 have been moved, the position of the core 11 and the outer core mold 10 is maintained.Then, due to the movement of the socket core 811g, the blade 9, the inner core 11, and the outer core mold 10 are in the same position as the socket core 811g. When the pin shaft 21 of the connecting rod 20, which is loosely inserted IL'''C, reaches the end in the direction of the inner Ml core mold of the swidth groove 18 (marginal distance), the movement of the socket core mold l! The inner periphery of the core W11 is the same as that of the 11th century.
Since it is a square that is moved by K along the outer circle line of O, the inner circumference core lit! It moves in the direction of arrow G as shown in FIG. tζO movement curve 1l
The inner circumferential circle line of the inner circumferential core mold 11 is along the IO outer circle line Ic, which is explained in FIG. It can be evacuated in such a way that it does not swing by itself. Maintain the retracted state' and move the socket core mold 12 [arrow B] together with the outer core mold 1G.
If you make a fuss in the direction, it's number one! As shown in the figure, it is possible to remove the mold from the shape-tube lb while maintaining the screw relationship at.

If the operating rod 14t and the inner core Wiii are retracted and locked in a skin-like manner by the socket core mold (not shown), all the cores mtim can be removed by one pull-out operation of the socket core mold. I can explain it.

Since the core mold for forming a curved pipe of the present invention is constructed in this way, it is possible to mold a curved pipe whose curved portion is perfectly circular, and the structure of the core mold is simple, and the core mold is extremely easy to degrease. It can be provided with high accuracy and can be constructed for the convenience of the pipe system.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory mountain views showing -fjt of a bent pipe, Figure 8 is a sectional view showing an example of the construction of a core mold for forming, and WJ
Figure 4 is an example of another curved pipe and its core mold' (L
7th tlt circuit diagram, 6th is an example of a curved pipe of other shapes.
Figure 6 is a side view of H showing an example of a curved pipe formed using the core metal mIt of the present invention, and figure j87 is the λ of the present invention.
・The Ayu molded in Fig. 6 is shown in Fig. 8, with a part of the core mold cut away.
9 is a front view showing one side of the metal core; and FIG. 10 is a developed sketch showing the configuration 1 of the mold. Figure 11 and 1st! The figure is a one-page explanation of the operation of the WIIL type process. l... Bent pipe 2... Socket 8... Insertion port 4... Expanded diameter socket 6... Backing 6... Split combination core mold 7... Inner circumference circular line 8. ...Outer circle line 9...
Core metal 5 of the present invention 10...Outer core temperature 11...Inner circumference core type 12...Socket core type 18...Open end internal regulation control n14...Operation rod 16...Connection device
16...Line skeleton hole 17...116 member 1
8... Sphiid hole 19... Fulcrum hole 20.
...Connection shuttle 21...Bin shaft Applicant: Kubota Iron Works Co., Ltd.

Claims (1)

[Claims] (1) A core mold for forming a curved pipe that is curved at an arbitrary angle and continues on both sides to form an expanded diameter socket St or a straight pipe part, the inner circumference Is of the curved part core mold [ A circular line with a center of curvature 1 at a position close to the center of curvature of the outer circle line om Divided by a circular arc surface, each has an inner circumference of 3 and an outer circumference of the core type.
Each of these inner peripheral main islands is formed into a wall that moves along the outer periphery 8, and is connected to the enlarged diameter socket part No. 3 or the straight pipe part core type with a well-connected rod to allow for movement, The outer core type is configured by connecting to the operating rod that slides with the enlarged diameter socket L5lt or the straight pipe S3 retainer.