JP2887659B2 - Die casting mold for inner cylinder of key cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting die for an inner cylinder of a key cylinder or the like.

[0002]

2. Description of the Related Art Conventionally, this type of die casting mold has a cavity formed between a fixed mold and a movable mold so that the moving direction of the movable mold and the axial direction of the inner cylinder of the key cylinder are in the same direction. An extruding pin that is formed and slidably mounted with two slide cores, which are arranged so that forming pieces forming a plate tumbler insertion hole in a movable mold face each other, and presses a molded product to remove the molded product from the movable mold. Was slidably mounted on a movable mold.

[0003]

In a conventional die casting die such as an inner cylinder of a key cylinder, a piece forming a plate tumbler insertion hole of a slide core is worn by sliding movement and a large amount of heat is absorbed. There is a disadvantage that the formed piece is easily broken due to fatigue caused by heating and cooling. In addition, since the molded product is pushed out of the movable mold by the push pin, the push pin remains on the molded product, making it hard to see.

The present invention has been made in view of the above-mentioned conventional drawbacks,
Efficiently preventing damage due to abrasion of the insertion hole forming piece and fatigue caused by heating and cooling, improving durability, and preventing extruded pin marks on molded products, increasing product value It is an object of the present invention to provide a die-casting mold for an inner cylinder of a key cylinder, which can be increased.

The above and other objects and novel features of the present invention will become more completely apparent when the following description is read in conjunction with the accompanying drawings. However, the drawings are for explanation only, and do not limit the technical scope of the present invention.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method in which a patenting line is located in a longitudinal direction of an inner cylinder of a key cylinder or the like and has a plurality of radial insertion hole forming pieces. A fixed mold in which a fixed side cavity is formed, a movable mold in which a movable side cavity having a plurality of radial insertion hole forming pieces to be clamped with the fixed mold, and a movable mold in which A pair of slides having an inner diameter forming portion which is inserted into the fixed side cavity and the movable side cavity to form an inner diameter portion at the time of mold clamping which is slidably mounted in a direction perpendicular to the moving direction of the movable mold. And a pair of inclined pins fixed to the fixed die, which slides the pair of sliding cores so that the inner diameter forming portion is disengaged from the molded product when the mold is opened. A slide core moving mechanism including inclined pin insertion holes respectively formed in the pair of slide cores to be inserted; at least two or more overflow holes formed in the slide core; Extrusion pins slidably mounted on the movable mold so as to position the tip end respectively constitute a die casting die such as an inner cylinder of a key cylinder.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 6, reference numeral 1 denotes a fixed die, and a patenting line is located in the fixed die 1 in a longitudinal direction of an inner cylinder of a key cylinder or the like. In addition, a fixed cavity 3 in which a plurality of radial insertion hole forming pieces 2 are formed, and a gate 4 for supplying molten metal into the fixed side cavity 3 are formed.

A movable mold 5 is mounted on the fixed mold 1 by a movable mold moving device 6 using a hydraulic cylinder or the like so that the mold clamping mold can be opened. A movable cavity 8 is formed which is located in the longitudinal direction of the inner cylinder and the like and in which a plurality of radial insertion hole forming pieces 7 are formed.

Reference numerals 9 and 10 denote T-shaped guide grooves formed on the fixed mold 1 side of the movable mold 5 in a direction perpendicular to the moving direction of the movable mold 5 as shown in FIG. 11, 11
A pair of slide cores T-shaped guide pieces 12 and 12 are slidably mounted on the pair of slide cores 9 and 10, respectively, in the fixed side cavity 3 and the movable side cavity 8, respectively. Positioned inner diameter forming part 13, 1
4 are formed.

Reference numeral 15 denotes a slide core moving mechanism for automatically moving the pair of slide cores 9 and 10 so that the inner diameter forming portions 13 and 14 are removed from the molded product 16 when the mold is opened.
The slide core moving mechanism 15 includes a pair of inclined pins 17 fixed to the fixed mold 1, and the pair of slide cores so as to engage with the pair of inclined pins 17 and slide. 9 and 10 are formed.

Reference numerals 19, 19 designate overflow holes formed in the slide cores 9, 10 on the movable mold 5 side.

Reference numerals 20, 20 denote the overflow holes 19,
The portion solidified in 19 is pressed to remove the molded product 16 attached to the movable mold 5. The push pin is slidably attached to push pin insertion holes 21, 21 formed in the movable mold 5. The push-out pins 20, 20 are mounted so as to be operated by a push-out pin moving device 22 using a hydraulic cylinder or the like for moving the molded product 16 to be removed from the movable mold 5 after the movable mold 5 is opened. .

The casting die casting mold 23 such as the inner cylinder of the key cylinder as shown in FIG. 3 having the above-mentioned structure, clamps the movable mold 5 to the fixed mold 1 as shown in FIG. The molten metal is press-fitted into the cavity 24 through the gate 4 (not shown). At this time, the molten metal also enters the overflow holes 19, 19.

When the molten metal is press-fitted into the cavity 24 and solidified, the movable mold moving device 6 is operated, and the movable mold 5 is moved.
Is moved from the fixed mold 1 in the mold opening direction. Due to the movement of the movable mold 5 in the mold opening direction, the sliding cores 9 and 10 are slid outward by the inclined pins 17 and 17 as shown in FIG. The inner diameter forming portions 13 and 14 come off.

Next, as shown in FIG. 5, the push pin moving device 22 is operated, and the portions 19a, 19a solidified by the overflow holes 19, 19 attached to the molded product 16 are pressed by the push pins 20, 20. The molded product 16 attached to the movable mold 5 can be removed and taken out.

Next, the movable mold moving device 6 is operated, and the movable mold 5 is clamped to the fixed mold 1 so that the pair of slide cores 9 and 10 move inward along the inclined pins 17 and 17. In the direction shown in FIG.

[0018]

Next, different embodiments of the present invention shown in FIGS. 7 to 11 will be described. In addition,
In the description of the different embodiments of the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and redundant description will be omitted.

The second embodiment of the present invention shown in FIGS. 7 to 11 is mainly different from the first embodiment of the present invention in that a square cylindrical key having a flange 25 at one end is provided. A fixed mold 1A, a movable mold 5A, a pair of slide cores 9A,
A, since the cavity 24A is formed in the die 24, the die casting die 23 such as the inner cylinder of the key cylinder constructed as described above is used.
Even in the case of A, the same operation and effect as in the first embodiment of the present invention can be obtained.

[0020]

As apparent from the above description, the following effects can be obtained in the present invention.

(1) A fixed mold in which a parting line is located in the longitudinal direction of an inner cylinder of a key cylinder or the like, and a fixed side cavity having a plurality of radial insertion hole forming pieces is formed, and A movable mold having a movable cavity having a plurality of radial insertion hole forming pieces to be clamped to the mold, and sliding the movable mold in a direction perpendicular to a moving direction of the movable mold; A pair of slide cores having an inner diameter forming portion inserted into the fixed side cavity and the movable side cavity to form an inner diameter portion at the time of mold clamping movably mounted, and molding the pair of slide cores at the time of opening the mold; A pair of inclined pins fixed to the fixed mold to be slid so that the inner diameter forming portion is removed from the product, and formed on the pair of sliding cores into which the pair of inclined pins are inserted. A sliding core moving mechanism comprising a slanted pin insertion hole, at least two or more overflow holes formed in the sliding core, and the movable mold so that a tip end is located in each of the overflow holes. And a push pin slidably mounted on the mold, so that when the molded product is removed from the movable mold, the push pin can be pushed by pressing the solidified portion with the overflow hole. Therefore, it is possible to reliably prevent the trace of the push pin from sticking to the molded product as in the related art, and to mold a clean product.

(2) According to the above (1), a plurality of insertion hole forming pieces for forming a plurality of insertion holes in the radial direction are formed in the fixed mold and the movable mold. Compared to the formed one, it is less susceptible to fatigue due to heating and cooling, and the durability can be improved.

(3) According to the above (1), since the insertion hole forming pieces are formed in the fixed mold and the movable mold, a plurality of radial insertion holes can be formed with high dimensional accuracy.

[Brief description of the drawings]

FIG. 1 is a sectional view of a molded state according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of an attached state of a slide core according to the first embodiment of the present invention.

FIG. 3 is an explanatory view of a molded product according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing a mold opening state according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating the operation of the push pin according to the first embodiment of the present invention.

FIG. 6 is a sectional view of the first embodiment of the present invention in a mold-clamped state.

FIG. 7 is a sectional view of a molding state according to the second embodiment of the present invention.

FIG. 8 is a side view of a molded product according to a second embodiment of the present invention.

FIG. 9 is a sectional view of a molded product according to a second embodiment of the present invention.

FIG. 10 is a sectional view showing a mold opening state according to the second embodiment of the present invention.

FIG. 11 is an explanatory diagram of the operation of the push-out pin according to the second embodiment of the present invention.

[Explanation of symbols]

 1, 1A: fixed mold, 2: insertion hole forming piece, 3: fixed side cavity, 4: gate, 5, 5A: movable mold, 6: movable mold moving device, 7: insertion hole forming piece, 8: 9, 9A: slide core, 10, 10A: slide core, 11: guide groove, 12: guide piece, 13: inner diameter forming part, 14: inner diameter forming part, 15: slide core moving mechanism, 16: molded product, 17: inclined pin, 18: inclined pin insertion hole, 19: overflow hole, 20: extrusion pin, 21: extrusion pin insertion hole, 22: extrusion pin moving device, 23, 23A: die casting mold, 24 : Cavity, 25: flange portion, 26: inner cylinder of cylinder, etc.

Claims (1)

(57) [Claims] 1. A fixed mold in which a parting line is located in a longitudinal direction of an inner cylinder or the like of a key cylinder, and a fixed cavity having a plurality of radially formed insertion hole forming pieces is formed. A movable mold having a movable cavity having a plurality of radial insertion hole forming pieces to be clamped to the mold, and sliding movement of the movable mold in a direction perpendicular to a moving direction of the movable mold. A pair of slide cores having an inner diameter forming portion inserted into the fixed side cavity and the movable side cavity to form an inner diameter portion at the time of mold clamping, which is mounted so as to be capable of being mounted; A pair of inclined pins fixed to the fixed mold to be slid so that the inner diameter forming portion comes off, and formed on the pair of sliding cores into which the pair of inclined pins are inserted. A sliding core moving mechanism including an inclined pin insertion hole, at least two or more overflow holes formed in the sliding core, and sliding to the movable mold so that a tip end is located in each of the overflow holes. A die for casting, such as an inner cylinder of a key cylinder, comprising a push pin movably mounted.