Combined long triangular die

Abstract

The utility model relates to a combined long triangular die which comprises a die shell, a die sleeve and die cores, the die sleeve is arranged between the die shell and the die cores, a positioning groove is formed in one side of the die sleeve, a positioning pin is arranged in the positioning groove, and the die cores comprise a first die core, a second die core and a third die core which are coaxially arranged up and down. The die sleeve comprises a first die sleeve body, a second die sleeve body and a third die sleeve body which are used for wrapping the first die core, the second die core and the third die core respectively, and the length of the positioning pin is larger than the sum of the length of the positioning groove of the second die sleeve body and the length of the positioning groove of the third die sleeve body. By the adoption of the technical scheme, the first die core, the second die core and the third die core are triangular cavities and inserted into the positioning grooves through the positioning pins, the first die sleeve, the second die sleeve and the third die sleeve are aligned in the same cavity, assembling is convenient, efficiency is high, and compared with an integrated die core, the triangular cavities of inner holes of the first die core and the second die core, slow wire feeding machining is achieved; and the third die core is high in discharge machining and slow wire feeding machining efficiency, stable in die quality and size precision, low in cost and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically to a combined long triangle mold. Background Art

[0002] Slender parts are a common type of parts. Existing slender parts are mostly formed by molds. However, for a type of non-circular and non-through hole (with steps) small hole cavity, due to material limitations, the mold is made of tungsten steel material, which is difficult to process and can only be processed by energy discharge technology. The processing technology first drills holes, makes long electrodes, and discharges the overall triangular cavity with a spark machine. Existing molds mostly use an integrated mold core, and the discharge processing time is 3-5 times that of the segmented type. Due to mass production, the general production process is the second, and the third section of the mold core is often damaged. Once it is scrapped, the entire mold needs to be replaced, which is costly and unstable in quality. The long electrode discharge is prone to produce a bell-mouth phenomenon, and the electrode loss is large. Utility Model Content

[0003] In summary, in order to overcome the deficiencies of the prior art, the utility model provides a combined long triangle mold.

[0004] To achieve the first purpose, the utility model provides a third technical solution: a combined long triangle mold, including a mold shell, a mold sleeve and a mold core, the mold sleeve is arranged between the mold shell and the mold core, a positioning groove is arranged on one side of the mold sleeve, a positioning pin is arranged in the positioning groove, the mold core includes a first mold core, a second mold core and a third mold core which are coaxially arranged up and down, the mold sleeve includes a first mold sleeve, a second mold sleeve and a third mold sleeve for respectively wrapping the first mold core, the second mold core and the third mold core, and the length of the positioning pin is greater than the sum of the lengths of the positioning groove of the second mold sleeve and the positioning groove of the third mold sleeve.

[0005] By adopting the above technical scheme, since the first mold core, the second mold core and the third mold core are triangular cavities, the first mold sleeve, the second mold sleeve and the third mold sleeve are aligned with the same cavity by inserting the positioning pin in the positioning groove, which is convenient for assembly and efficient. At the same time, compared with the one-piece mold core, the triangular cavity of the inner hole of the first mold core and the second mold core is processed by wire walking, and the third mold core is processed by discharge machining. The wire walking processing efficiency is high, the mold quality and dimensional accuracy are stable, the cost is low, the vulnerable parts are separated into single sections, and only the single section of the mold core needs to be replaced when damaged, which is convenient for maintenance.

[0006] The utility model is further configured as follows: a positioning through hole is arranged at a position of the mold shell corresponding to the positioning groove of the first mold core, a positioning top screw is arranged in the positioning through hole, and one end of the positioning top screw is arranged in the positioning groove.

[0007] By adopting the above technical solution and positioning the top screw, the direction of the triangle and the groove direction of the mold shell can be made consistent, and the directions of the molds in each station can be consistent. During production, the clamps can be brought over to smoothly enter the mold.

[0008] The utility model is further provided that: the positioning pin and the positioning groove are clearance-matched.

[0009] The utility model is further configured that: the gap between the positioning pin and the positioning groove is 0.01-0.02 mm.

[0010] The utility model further provides that: the third mold core includes a molding cavity, the molding cavity includes a first section, a transition section and a second section, the cross-sectional width of the first section is greater than that of the second section, and the transition section is arranged between the first section and the second section.

[0011] The utility model is further configured as follows: a limiting portion is provided at the upper end of the mold shell, the first mold sleeve includes a top portion adapted to the inner wall of the limiting portion and a bottom portion adapted to the inner wall of the mold shell, the cross-section of the first mold sleeve is arranged in a convex shape, the outer diameters of the second mold sleeve and the third mold sleeve are adapted to the outer diameter of the bottom of the first mold sleeve, a cushion block is provided under the mold core, and the lower end of the mold shell is connected with a lock nut to fix the cushion block, the mold sleeve and the mold core.

[0012] By adopting the above technical solution, the combined mold is more stable through the lock nut connection, and the mold shell can be assembled inverted through the limiting part, which is convenient for assembly.

[0013] The utility model is further provided with: a gap is provided between the positioning groove at the top and the inner wall of the limiting part.

[0014] By adopting the above technical solution, the position of the positioning groove can be confirmed from the upper end.

[0015] The third side describes the specific implementation of the utility model in combination with the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0017] Figure 2 It is a partial stereogram of an embodiment of the utility model;

[0018] Figure 3 A cross-sectional view of an embodiment of the utility model;

[0019] Figure markings: 1. mold shell, 11. positioning through hole, 12. limiting part, 2. positioning pin, 3. mold sleeve, 31. first mold sleeve, 311. top, 312. bottom, 32. second mold sleeve, 33. third mold sleeve, 34. positioning groove, 4. mold core, 41. first mold core, 42. second mold core, 43. third mold core, 431. molding cavity, 5. positioning top screw, 6. pad, 7. lock nut. DETAILED DESCRIPTION

[0020] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0021] See attached Figure 1-3 The present embodiment discloses a combined long triangle mold, comprising a mold shell 1, a mold sleeve 3 and a mold core 4, wherein the mold sleeve 3 is arranged between the mold shell 1 and the mold core 4, a positioning groove 34 is arranged on one side of the mold sleeve 3, a positioning pin 2 is arranged in the positioning groove 34, the mold core 4 comprises a first mold core 41, a second mold core 42 and a third mold core 43 which are coaxially arranged up and down, the mold sleeve 3 comprises a first mold sleeve 31, a second mold sleeve 32 and a third mold sleeve 33 for wrapping the first mold core 41, the second mold core 42 and the third mold core 43 respectively, and the length of the positioning pin 2 is greater than the sum of the lengths of the positioning groove 34 of the second mold sleeve 32 and the positioning groove 34 of the third mold sleeve 33.

[0022] This embodiment further provides that: the mold sleeve 3 is a tungsten steel sleeve, and the mold core 4 is made of tungsten steel.

[0023] This embodiment further provides that: the mold shell 1 is provided with a positioning through hole 11 at a position corresponding to the positioning groove 34 of the first mold core 41 , and a positioning top screw 5 is provided in the positioning through hole 11 , and one end of the positioning top screw 5 is provided in the positioning groove 34 .

[0024] This embodiment further provides that: the positioning pin 2 and the positioning groove 34 are clearance-matched.

[0025] This embodiment further provides that: the gap between the positioning pin 2 and the positioning groove 34 is 0.01-0.02 mm.

[0026] This embodiment further provides that: the third mold core 43 includes a molding cavity 431, the molding cavity 431 includes a first section, a transition section and a second section, the cross-sectional width of the first section is greater than that of the second section, and the transition section is arranged between the first section and the second section.

[0027] This embodiment is further configured as follows: a limiting portion 12 is provided at the upper end of the mold shell 1, the first mold sleeve 31 includes a top 311 adapted to the inner wall of the limiting portion 12 and a bottom 312 adapted to the inner wall of the mold shell 1, the cross-section of the first mold sleeve 31 is arranged in a convex shape, the outer diameters of the second mold sleeve 32 and the third mold sleeve 33 are adapted to the outer diameter of the bottom 312 of the first mold sleeve 31, a cushion block 6 is provided under the mold core 4, and the lower end of the mold shell 1 is connected to the lock nut 7 to fix the cushion block 6, the mold sleeve 3 and the mold core 4.

[0028] This embodiment further provides that: a gap is provided between the positioning groove 34 of the top 311 and the inner wall of the limiting portion 12 .

[0029] The above-mentioned “between” does not only refer to directions and positions, but also includes the meaning of the interaction between different parts.

[0030] Although this article uses more terms such as mold shell 1, positioning through hole 11, limiting portion 12, positioning pin 2, mold sleeve 3, first mold sleeve 31, top 311, bottom 312, second mold sleeve 32, third mold sleeve 33, positioning groove 34, mold core 4, first mold core 41, second mold core 42, third mold core 43, molding cavity 431, positioning top screw 5, pad 6, lock nut 7, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A combined long triangle mold, characterized in that: It includes a mold shell, a mold sleeve and a mold core, the mold sleeve is arranged between the mold shell and the mold core, a positioning groove is arranged on one side of the mold sleeve, a positioning pin is arranged in the positioning groove, the mold core includes a first mold core, a second mold core and a third mold core which are coaxially arranged up and down, the mold sleeve includes a first mold sleeve, a second mold sleeve and a third mold sleeve which are respectively used to wrap the first mold core, the second mold core and the third mold core, and the length of the positioning pin is greater than the sum of the lengths of the positioning groove of the second mold sleeve and the positioning groove of the third mold sleeve.

2. A combined long triangle mold according to claim 1, characterized in that: The mold shell is provided with a positioning through hole at a position corresponding to the positioning groove of the first mold core, a positioning top screw is provided in the positioning through hole, and one end of the positioning top screw is provided in the positioning groove.

3. A combined long triangle mold according to claim 1, characterized in that: The positioning pin and the positioning groove are clearance-matched.

4. A combined long triangle mold according to claim 3, characterized in that: The clearance between the positioning pin and the positioning groove is 0.01-0.02 mm.

5. The combined long triangle mold according to claim 1, characterized in that: The third mold core includes a molding cavity, which includes a first section, a transition section, and a second section. The cross-sectional width of the first section is greater than that of the second section, and the transition section is arranged between the first section and the second section.

6. The combined long triangle mold according to claim 1, characterized in that: A limiting portion is provided at the upper end of the mold shell, the first mold sleeve includes a top portion adapted to the inner wall of the limiting portion and a bottom portion adapted to the inner wall of the mold shell, the cross-section of the first mold sleeve is convex, the outer diameters of the second and third mold sleeves are adapted to the outer diameter of the bottom of the first mold sleeve, a cushion block is provided under the mold core, and the lower end of the mold shell is connected with a lock nut to fix the cushion block, the mold sleeve and the mold core.

7. A combined long triangle mold according to claim 6, characterized in that: A gap is set between the positioning groove at the top and the inner wall of the limiting part.

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