JPS5979726A - Mold apparatus for preparing molded product having undercut within opening thereof - Google Patents

Abstract

PURPOSE:To prevent the galling producted between a core metal and a mold, and to enable the enhancement of processing accuracy, by supporting one end part of a push member by a slide plate so as to make said mold push member swingable to a mold side. CONSTITUTION:When a knock-out pin 8 is upwardly moved after a molded product 7 is formed, a mold 6, a mold push member 9, a core 10 and a slide plate 12 are also moved upwardly. When the spring 11 between the mold push member 9 and the core 10 reaches above the upper opening surface of a second guide hole 4, the member 9 is swung toward the mold 6 around a spherical surface bearing 13 and the mold 6 is displaced while cooperated toward the core metal 2 and reduced in the diameter thereof. By this operation, the close contact of the mold 6 and the molded product 7 is released and the withdrawal of the molded product is enabled. Because the mold 6, the knock-out pin 8 and the mold push member 9 are sepately formed and constituted, the mold can be miniaturized and processing accuracy can be enhanced while the sliding of the mold to the core metal becomes smooth.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding device for a molded product having an undercut inside an opening. Conventionally, as a molding device for a molded product having an undercut inside an opening, a In order to facilitate the extraction work of the molded product, the mold that is in close contact with the undercut surface of the molded product is moved to the tip side of the mandrel, and the diameter of the mold is reduced from the end. There are known devices that do this. Knockout pin 2 for moving the mold and the butterfly mold [1]
FN1 which is integrally formed with the molding member that reduces the diameter of the tooth shape.
As a result, the molds themselves have become larger, reducing the processing requirements for molded products. However, as the size of the mold increases, the swing angle between the axial direction of the mandrel and the direction of movement of the mold increases, and a large bending force is applied to the mold when extracting the molded product. At the same time, the smooth sliding of the mold along the axial direction of the mandrel is hindered, and the relationship between the mandrel and the mold is σ.
The present invention has the disadvantage that strain occurs between C and C.The present invention eliminates this disadvantage, and its purpose is to downsize the mold and improve processing accuracy. It is an object of the present invention to provide a mold device as a finished product having an undercoat inside the opening to prevent galling between the metal and the mold.

The configuration of the present invention is such that the mold, the knockout pin for moving the mold, and the latch member for reducing the diameter of the mold are separately integrated into one.
A knockout pin is placed in the mold 11 (9j, jJ) so as to be movable in the same direction as the axial direction of the mandrel. A slide plate is connected to the other end of the molding member, and the sliding plate is arranged so as to be slidable in the same direction as the moving direction of the knockout bin. , and the other end of the viewing member is supported by a slide plate so that the viewing member can swing toward the mold side.

An embodiment of the present invention applied to a molding device for an outer ring of a 4-speed joint will be described below with reference to FIG. ITi'i.

FIGS. 1 and 2 show a first example of the actual fabric of the present invention, in which 1 is a goose set, and the goose set 1 has a core 2/
In this core metal 2, a first guide hole 3 is formed on the side closer to the central axis, and a guide hole 4 with a straight line 2 is formed on the far side. , 4 kein 2
It is likely to be chewed in the same direction as the axial direction. A center six-generation carved part 5 is formed in the core metal 2 (7+ missing end part).

Six hollow molds are provided on the outer surface of the mandrel 2, and the tooth-shaped molds 6 are divided into a plurality of pieces in the same direction as the radial direction of the mandrel 2. Sei 1
An engaging surface 6a that engages with the center hole molded portion 5 of the mandrel 2 is formed on the inner solid surface of the mold 6. The shape of the outer circumferential surface of the mold 6 is such that the outer ring of a constant velocity joint as a product (hereinafter referred to as a manufactured product) 7f has a desired shape, with 1 being replaced by 1 so that it can be processed. The C'I knockout pin 8 is installed at the end of the mold 60 (θ).
17! ml guide hole 3 and is movable in the same direction as the axial direction of the mandrel 2 (0).This knockout pin 8 is connected to the driving means (1) when the molded product 7 is pulled out. .) so as to be actuated upwards.

9 is a molding member for reducing the diameter of the forming parts 1 to 6;
The f-, ) end of the molding member 9 is a bolt (1 pin)
9aK, and is therefore connected to the outer circumferential edge of the molding 6. Blood i on the near 1c side on the core metal 2 of the molding part ti9
Approximately at the center 1 fl (from the bottom end to the lower end, there is a slight notch), and a recess is formed on the fast side surface, and the insert 1 is inserted into this recess.
0 is inserted into the Z.0 insert 10 and the molding member 970 # is inserted into the second void hole 4.1.・Gold 2σ・
A spring 11 is mounted between the member 1 and the member 9 so as to be movable in the same direction as the axial direction. 1';
! Z・0 12 is a slide plate, and one side iTl of the slide plate 12 keel
'i is disposed close to one side of the guide set 1 in the same direction as the axial direction of the mandrel 2.

The sliding plate 12 is connected to the spherical bearing 13 via the spherical bearing 13. The end of the shifting member 9 is held tightly and is swingably supported on the mold 6 side using a spherical bearing 13 as a swinging fulcrum. 14 A connecting bolt fixed to the F end of the shape shifting member 9 passes through the slide plate 12 and the spherical bearing 137 sequentially from below in a loosely fitted state. A spring installed between the head of the 15-piece connecting bolt 14 and the slide plate 12 has the function of elastically supporting the slide plate 12 and allowing the shifting member 9 to swing completely smoothly.

Next, the operation of the molding device configured as described above will be explained.

Formation 1 [6 After molding the molded product 7, when the molded product 7 is extracted, the knockout bin 8 is first moved through the drive means.
moves upward and increases to 11+. Then, in conjunction with the knockout bin 8, the mold 6, the mold shifting member 9, the insert 10, and the slide plate 12 move upward. After that, the molding member 9
The spring 11 installed between the and the insert 10 is positioned higher than the -L opening surface of the second guide hole 4! As a result, spring 1
The force of 1 causes the shifting member 9 to swing toward the Φ sculpture 6 with the spherical bearing 13 as the center of swing, and then the shifting member 9 moves toward the 1'
1 Dosho series axis 11 (sculpture 6 ・C3 gold 2 side displacement 1
2). Figure 2 shows the state in which the diameter of the Seiichisugi type 6 has been reduced. By reducing the diameter of the mold 6 in this way, the adhesion between the mold 6 and the imaginary 1-shaped product 77σ] is released, and the molded product 7 is extracted h; what is done during production. becomes. Namu, place the mold 1'1; When the material 9 swings, a spring holds the slide plate 12 in place! According to the Japanese fabric example 1, in which the swinging resistance of the mold placement member 9 is reduced by 1, the mold 6, the knockout pin 8, and the 4-piece abutment part 9 are formed separately. These are 1′! 4
Since it has been completed, it is revised! +! ! 6 itself is conventional...
9 is made smaller, and the machining precision 11 of molded product 7 is reduced to 1:, formula 2. Since the swing angle between the axial direction of the mandrel 2 and the moving direction of the mold 6 is small, the sliding of the toothed mold 6 on the mandrel 2 is smooth, and 1) the occurrence of one-slip is reduced to 4 iN force. j
XIj city, seven together, then hl;, l[71
In the above example, the bending force acting on the 46 is also small. As a means for biasing the 1H1 mold gathering member toward the mold side, a spring was used and the spring was built into the mold placement member.As the biasing means, an oil IE cylinder, A hollow cylinder or the like may be used, and in this case, the measuring means is not necessarily limited to a structure built in the mold placement member, but may also be arranged outside the mold placement member. .

Figure 3 shows an actual example of color 2 of the present invention, and the whistle 1
The same borrowing ψ, element 2 will be given the same reference numerals as the actual employment example 1 above, and the explanation thereof will be omitted. The same applies to the example.Characteristics of the present example H1 By providing a rotary roller 17 at the upper end of the human child 10 in contact with the concave portion J-, irl 16 of the ) W gathering member 9 at 41, This is because the swinging resistance of the mold placement member 9 is made smaller.

Note that the do end portion of the shifting member 9 is swingably supported by the slide plate 12 via a support pin 18.

Figure m4 shows an embodiment of the hole 3 of the present invention.The feature of this example is that a backup member 21) is fixed to the L portion of the die set 1 via an external fifull bolt 19. 20 and the M' shifting member 9, the insert 1
() and this insert 10 (J)N put the spring 11 on the material 91111J and insert the insert 10
2) With the configuration in which the co-rotating roller 17 is provided in sliding contact with the outside 1111 of the four-way portion iO9, the movement of the mold placement member 9C is carried out smoothly. It is in.

Figure 5 shows the fourth example of the present invention.Characteristics of the example: 1 dimension, tilt in which a receiving ring 21 is interposed between the molding hole 6 and the knockout pin 8. This is where the contact between the acid type 6 and the knock-a-cut pin 8 in both rows 1 [Ii] is made to prevent 44 scratches.

As explained below, the first step of the present invention is to create a mold using e-type devices. : The knockout pin that moves the mold and the r+G1 marking J are placed at the mold position (9) that reduces the diameter of the mold.
Since it is a two-piece binding in which each of the three backs of the material is formed into one piece and then combined, it is possible to make 1. 1111 It has the effect of improving machining accuracy. Since the knockout pin is moved in the same direction as the axial direction of the mandrel,
The swing angle between the axial direction of the mandrel and the moving direction of the mold becomes smaller, and therefore not only does the bending force f exerted by IJl'1 on the mold become smaller, but also the sliding radius of the mold becomes circular 7N#.
1 (
Along with stopping J7, there is an advantage that the degree of freedom in selecting the shape and material of the imaginary and carved molds is increased compared to the past.

[Brief explanation of drawings]

Fig. 1 is a half-sectional view showing an example of the actual fabric of the flute 1 of the present invention, @2 Fig. I/' is a half-sectional view showing the state σ/2 of the one in Fig. 1 in which the IN type product is wandering; Is Fig. 3 of the present invention? Main part raw new 1 showing 11h example of 2-glue
Figures m and 641 are half-sectional views showing the 3σ node αil>11 of the present invention, and Figure 15 is a half-sectional view showing the fourth practical example of the present invention. l...Guise, Soto 2...Shinkin c'l...
・Number 1b Q'i 8''', Tsukout pin q...8 yori 17 rri 1ζ material 11 -
Nogune 12... Sura Ido board patent use'! , il'i people Toyota Motor Corporation (
C child or 1 person) Fang 1 figure, 2 figures, 4 doors, 5 figures, -115-

Claims (1)

[Claims] (1) A mold that is divided into multiple pieces is arranged around the outer periphery of a mandrel that is not fixed to the Guicent, and a knockout pin that is movable in the same direction as the axial direction of the mandrel is installed in the mold. At the same time, one end of a shifting member disposed on the outside of the mold is connected to the mold, and the shifting member is fully moved!・Connect a slide plate to the four inertia parts, arrange the slide plate so that it can slide in the same direction as the moving direction of the knockout pin, bias the mold shifting member toward the mold side, and A molding device for a molded product having an undercut inside an opening, characterized in that the other end of the shifting member is supported by the slide plate so that the shifting member can swing toward the mold.