JPS58140216A - Boring of molding - Google Patents

Abstract

PURPOSE:To obtain a molding having an accurate through-hole by a method wherein a rather long projection pin for working a hole is provided in one of dies while a concave section is provided in the other thereof and after a molding, a convex section of the molding is cut off when a through-hole is produced in the molding of FRP. CONSTITUTION:When an FRP product having a through-hole 6 is molded, a concave section 13 is provided at a part corresponding to a through hole 6 in an upper die 1 while a projection pin 4 is protruded at a corresponding part of a lower die 2. The distance of the tip of the projector pin 4 to the bottom of a concave section 13 in the die clamping is set at about 0.2-1.0mm. to prevent the damage and wear of the projection pin 4. After a molding using the upper die 1 and the lower die 2, a top of a convex section 10 of the molding is cut off with a cutting tool such as an end mill 14 and a cutter 15 to obtain a desired through-hole 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for drilling holes in Ei')LP nozzleless molded products for toilet tanks, purification tanks, etc.

Conventionally, there is a method for drilling holes in press-formed products of FF (P), in which a slide structure such as a hydraulic cylinder is installed in the mold when press-forming the molded product with a mold, and a method of drilling V-holes during molding is available. Generally, a method of providing protruding pins on the mold is adopted due to the high cost of the J-type.In other words, a mold consisting of the F-type (2) as shown in Figure 1 is used. (3) A protruding pin (4) was provided on the lower mold (2), and a hole i61 was drilled in the molded product 15) during the by type.

However, in this conventional example, the protrusion height of the protrusion + 4) and the thickness of the t-molded product are the same - f/cL, & Around the time of lid i31, I was a government official with a 4A interest rate (・
The membrane (7) is formed by U-Ratsu and the hole 16) is completed.
There may be cases where it does not finish, or it may not be possible to
) and the protruding pin (4) hit, causing the metal ding (3) and the real-sou bishi (
1) has the problem of causing wear and tear. In this way, it is difficult to drill a hole using only the protrusion (4), and f + t + 5 is inevitable. L for post-processing
For ylle, use the VC'I'l cutting die (8) as shown in Figure 2 to cut out the rear JJ1j machining L7, or make the ry'i shaped product i51.
There is a possibility that the hole tfi1 position and the punching part (9) ml- of hole 1 vertical position during machining (r] punching part (9) in Figure 2) may be misaligned. ) and molded products (5
) hole, 61a)" L tooth 4'k + t" must be matched, a)) High V stiffness equipment yellow is ^<, and hole 11i 1st place 1# or I・When will the match come to fruition?
5) Due to contraction and deformation of IJ 15)
The present invention, in which it is necessary to force the can to place the VC in a certain position when it is removed and sorted, was invented in view of the above-mentioned drawbacks of the conventional technology, and its purpose is to The protrusion of the caltrop was damaged by #1, and it did not fall off, and the cutting tool was used.
There is no slippage on the edge of the hole, and the convex part is reminiscent of the hole machining force υ of a doll with a strong impression.

Above - Unexploited exception "God (explained to. The present invention
, l' molded product 15) by mold (3): t'i
+ When turning, a convex Ms too) is formed on the crystal 15) and a hole is drilled in this convex F+iJ, flO) -
A hole 16) is formed by leaving one convex part (one shell part of 10j) by forming the convex part (4) of 1, 1, and after molding, the convex part fI is formed.
Cutting the first shell part 111) of O) in step 1-1, N,',fli
Molded seal 1 whose glaze characteristic is an L-shaped hole
This invention relates to a method for drilling a hole in the above-mentioned Kensue.To explain the present invention using an embodiment shown in the drawing, (3) is made up of an upper die: 1) and a geta (2). The mold is configured to mold a molded product (5) by interposing the material of the molded product 15) of l'+(,I) between the upper mold 11) and the lower mold (2). There is. A molded product 15) molded by a mold 13) and 1. For example, λ, toilet tank, purification 1! 1st - 1? 4, such as ri, and in the example of the figure P:j:
The flange part (12) of the TA", I grade 15) has a single V-shaped hole so that a hole can be drilled during molding.
2) Fuushiji jJk Sugi 1413 minutes has a protrusion (4)
is provided, and this protrusion corresponds to (4).
A cedar collar If+a recessed part 113) is provided. Here, when the upper mold: 1) and the C mold +2j are combined, the distance between the tip of the projection pin (4) and the bottom of the fourth part (13) is about 0.2 to 1. (There is a distance of about J tnm and the protruding pin (4) is rubbed to prevent it from hitting the Nikoto 1111 and causing damage.), 4Q:ll and the lower mold (
When the mold is clamped by inserting a material between YJ and 2), a convex part (1 (11) is formed when the molded product 5) is pressed, and this convex part (oll K hole machining 11 'J's spit!Top of convex part (10) by caltrop (4)'+li
111 holes (6) are formed, leaving 111 holes (111).

Convex part: 10) r, J frame, y-ji part ll2) about (J, about 2-1.2M JL1 part (11) or end!'
It remains as I iin state ν.

In this way, the chest with a convex part of 10'l (
Eshido Sanru the river II = 1 + Yaarire j force Tsuta - 1
The hole (6) is formed by cutting with a cutting tool such as 16). Form the holes (6) as described above.
) is used to connect the molded parts (3-6) with bolts or nuts, or to connect the molded product (6) to another part H with bolts or nuts.

In the present invention, as described above, when a molded product of FI'LP is IJ'v and cedared by Kinpaku, a convex portion is formed on the molded product, and a protrusion 1:2 for drilling a hole is formed on this convex portion. The hole is formed by leaving the top of the convex part 7, and after forming, the top of the convex part is cut to form the recessed hole, so the presence of the convex part makes it easy to align the cutting tool. In the case of mechanization, the positioning of the cutting tool can be done with a rough cutting edge, which reduces the equipment cost, and since the hole position does not shift, it is a great innovation. This serves as a reinforcement, and also prevents the mold from coming into contact with the protruding caltrops and causing wear when the mold is clamped.

Since it is used to cut the convex part of the housing, it can be cut with a drill or cutter instead of a drill, and does not produce burrs like a drill.

[Brief explanation of the drawing]

Figure 1 shows the hole lNN1 during molding with a conventional mold.
Figure 2 is a schematic explanatory diagram of the state of punching with punching die-4~ after forming the same as above; Figure 3;
Explanation of the state in which the punching part and the punching part are misaligned 1-1, 41st-1 is the hole machining rE surface + 5 m1*l that also makes VC during molding with the mold invented by de, Fig. 5 1rJ times, I-
ノ side u "i ili + r + white so 1, ・C6 figure is rol
Cutting the concave part of the upper convex part.) #l River 1 pattern view, Figure 7 is a cross section of the same cutting part 1. 'XI-) -r
, 1:l) begging j mold,) 4) protruding surname l'gogo,! ,
・5) t, +y! 1 is the item 5, 1 () is the hole, (lu
ll fj convex portion, :11) is 114 parts. Agent Jusoku Iwaki 18 1. t Figure 7 Figure 1 Figure 2 Figure 3 Figure 4 / Figure 7 Figure 5 Figure 6 Figure 7 63-

Claims (1)

[Claims] The molded product of Ill FR, P is molded into Ii9.
When doing Ii, a convex part is formed on the VCl+ν type product, and a hole is made in this convex part with the protrusion of T:Ii+ leaving the top of the convex part! , ν, and after molding, cut 1 part of the convex part to form a hole, which is considered as %1 bV.
Application for substitute goods, 11J1 Law.