Ejector rod protection device at tail part of slender rod

Abstract

The utility model discloses an ejector rod protection device at the tail part of a slender rod, which comprises a stamping die shell, a main die shell, an equipment rear cushion block and a rear ejector rod, an ejector rod protection sleeve is arranged in the equipment rear cushion block, the ejector rod protection sleeve is positioned at the upper end of the rear ejector rod, an ejector rod is arranged in the ejector rod protection sleeve, and the rear ejector rod is positioned at the lower end of the rear ejector rod. The cross section of the ejector rod is round in the middle, a pair of arcs are symmetrically formed on the side edges of the ejector rod, the cross section of the ejector rod protection sleeve is round outside, an inner hole site is round in the middle, a pair of arcs are symmetrically formed on the side edges of the ejector rod protection sleeve, and the round size of the cross section of the ejector rod is smaller than that of the round size of the cross section of the hole site of the ejector rod protection sleeve. The section arc size of the ejector rod is smaller than the section arc size of the hole site of the ejector rod protection sleeve, and the section arc size of the hole site of the ejector rod protection sleeve is larger than the section circular size of the ejector rod. The ejector rod protection device at the tail part of the slender rod is used for protecting the ejector rod, so that the ejector rod is prevented from being broken in a stress process, and the forming efficiency and quality of a slender rod product are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of molds, and in particular to a top rod protection device for the tail of a slender rod. Background Technology

[0002] A mold is a set of molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, a mold is a tool used to create shaped objects; this tool is composed of various parts, and different molds are composed of different parts. It primarily achieves the shaping of objects by changing the physical state of the material being molded.

[0003] During the cold heading process, the product needs to be ejected. For slender rod products, the ejector rod also needs to be a slender structure. During the ejection process, it is not protected and will break at the lower end when subjected to pressure. Utility Model Content

[0004] One objective of this invention is to provide a top rod protection device for the tail of a slender rod, in order to solve the problems existing in the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A protective device for the tail of a slender rod includes a die shell, a main die shell, a rear pad block, and a rear ejector rod. A punch is mounted on the die shell. A die core is disposed inside the main die shell. An ejector rod protective sleeve is installed inside the rear pad block. The ejector rod protective sleeve is located at the upper end of the rear ejector rod. An ejector rod is disposed inside the ejector rod protective sleeve. The cross-sectional shape of the ejector rod is circular in the middle and has a pair of symmetrically formed arcs on its sides. The cross-sectional shape of the ejector rod protective sleeve is circular on the outside and has a central circular hole with a pair of symmetrically formed arcs on its sides. The circular dimension of the ejector rod's cross-section is smaller than the circular dimension of the hole in the ejector rod protective sleeve. The arc dimension of the ejector rod's cross-section is smaller than the arc dimension of the hole in the ejector rod protective sleeve. The arc dimension of the hole in the ejector rod protective sleeve is larger than the circular dimension of the ejector rod's cross-section.

[0007] As a preferred technical solution, a die back pad is installed inside the die housing, and a punch sleeve is provided at the lower end of the die back pad, through which the punch passes.

[0008] As a preferred technical solution, a mold core pad is installed at the lower center of the mold core.

[0009] As a preferred technical solution, a push rod is installed inside the ejector rod protective sleeve, and the ejector rod is located inside the push rod.

[0010] The beneficial effects of this utility model are as follows: It provides a top rod protection device for the tail of a slender rod, which protects the ejector rod and prevents it from breaking during the process of being stressed, thereby improving the molding efficiency and quality of slender rod products. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the overall structure of a top rod protection device for the tail of a slender rod as described in the embodiment;

[0013] Figure 2 This is a bottom structural diagram of a top rod protection device for the tail of a slender rod as described in the embodiment;

[0014] Figure 3 This is a side view of the ejector rod described in the embodiment;

[0015] Figure 4 This is a bottom view of the ejector rod described in the embodiment;

[0016] Figure 5 This is a side view of the ejector rod protective sleeve described in the embodiment;

[0017] Figure 6 This is a bottom view of the ejector rod protective sleeve described in the embodiment;

[0018] Figure 7 This is a side view of the push rod described in the embodiment;

[0019] Figure 8 This is a bottom view of the push rod described in the embodiment.

[0020] Figures 1 to 8 middle:

[0021] 1. Die shell; 2. Main die shell; 3. Equipment rear pad; 4. Punch; 5. Die core; 6. Ejector rod protective sleeve; 7. Ejector rod; 8. Circular; 9. Arc; 10. Die rear pad; 11. Punch sleeve; 12. Die core pad; 13. Push rod; 14. Rear ejector rod; 15. Product. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 8As shown in this embodiment, a push rod protection device for the tail of a slender rod includes a die housing 1, a main die housing 2, a rear pad block 3, and a rear ejector rod 14. A punch 4 is installed on the die housing 1. A mold core 5 is provided inside the main die housing 2. An ejector rod protective sleeve 6 is installed inside the rear pad block 3. The ejector rod protective sleeve 6 is located at the upper end of the rear ejector rod 14. An ejector rod 7 is provided inside the ejector rod protective sleeve 6. The cross-sectional shape of the ejector rod 7 is a central circle 8 with a pair of symmetrically formed arcs 9 on the sides. The cross-sectional shape of the ejector rod protective sleeve 6 is an outer circle 8 with a central circle 8 and a pair of symmetrically formed arcs 9 on the sides. The size of the cross-sectional circle 8 of the ejector rod 7 is smaller than the size of the cross-sectional circle 8 of the hole in the ejector rod protective sleeve 6. The size of the cross-sectional arc 9 of the ejector rod 7 is smaller than the size of the cross-sectional arc 9 of the hole in the ejector rod protective sleeve 6. The size of the cross-sectional arc 9 of the hole in the ejector rod protective sleeve 6 is larger than the size of the cross-sectional circle 8 of the ejector rod 7.

[0024] Furthermore, a die back pad 10 is installed inside the die housing 1, and a punch sleeve 11 is provided at the lower end of the die back pad 10. The punch 4 passes through the punch sleeve 11. A die core pad 12 is installed at the lower middle part of the die core 5. A push rod 13 is installed inside the ejector rod protective sleeve 6, and the ejector rod 7 is located inside the push rod 13.

[0025] When the ejector rod 7 is inside the push rod 13, it can rotate and retract within the push rod 13. Under the action of the circular part 8 of the ejector rod protective sleeve 6, the arc part 9 of the ejector rod 7 is blocked to prevent it from retracting. When ejecting the slender rod product 15, the movement of the ejector rod 7 within the push rod 13 pushes the product 15 upward out of the main mold shell 2. Under the action of the push rod 13 and the ejector rod protective sleeve 6, the ejector rod 7 will not bend or break.

[0026] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles applied thereto. Within the scope of the technology disclosed in this utility model, any variations or substitutions that are easily conceived by those skilled in the art should be covered within the protection scope of this utility model.

Claims

1. A top rod protection device for the tail of a slender rod, characterized in that, The device includes a die housing, a main die housing, a rear pad, and a rear ejector rod. A punch is mounted on the die housing. A die core is located inside the main die housing. An ejector rod protective sleeve is installed inside the rear pad, positioned above the rear ejector rod. The ejector rod is housed inside the protective sleeve. The ejector rod has a cross-sectional shape that is circular in the center and has a pair of symmetrically formed arcs on its sides. The ejector rod protective sleeve has a cross-sectional shape that is circular on the outside and has a central circular hole with a pair of symmetrically formed arcs on its sides. The circular dimension of the ejector rod's cross-section is smaller than the circular dimension of the hole in the ejector rod protective sleeve. The arc dimension of the ejector rod's cross-section is smaller than the arc dimension of the hole in the ejector rod protective sleeve. The arc dimension of the hole in the ejector rod protective sleeve is larger than the circular dimension of the ejector rod's cross-section.

2. The top rod protection device for the tail of a slender rod according to claim 1, characterized in that, The die housing is equipped with a die back pad, and a punch sleeve is provided at the lower end of the die back pad, through which the punch passes.

3. The top rod protection device for the tail of a slender rod according to claim 1, characterized in that, A mold core pad is installed at the lower center of the mold core.

4. The top rod protection device for the tail of a slender rod according to claim 1, characterized in that, A push rod is installed inside the protective sleeve of the ejector rod, and the ejector rod is located inside the push rod.

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