PULL OR PUSH ROD OR A LOCKING NUT FOR A MOLDING MACHINE

Abstract

A pull or push rod or locking nut for a molding machine has an undercut, and the undercut has an undercut cross-section, a side wall, and an undercut ramp. The side wall transitions via a first transition curvature into an undercut base, and the undercut base transitions via a second transition curvature into the undercut ramp. The undercut base, viewed in the undercut cross-section, is at least partially designed as a curvature, and the curvature of the undercut base differs from the first and/or the second transition curvature.

Claims

1. A pull or push rod or locking nut for a molding machine having at least one undercut, wherein the at least one undercut has an undercut cross-section a side wall and an undercut ramp, wherein the side wall transitions via at least one first transition curvature into an undercut base, and the undercut base transitions via at least one second transition curvature into the undercut ramp, wherein the undercut base, viewed in the undercut cross-section, is at least partially designed as a curvature, wherein the curvature of the undercut base differs from the at least one first and/or the at least one second transition curvature.

2. The pull or push rod or locking nut according to claim 1, wherein the at least one undercut is formed completely or partially circumferentially on the pull or push rod or locking nut.

3. The pull or push rod or locking nut according to claim 1, wherein the side wall has an angle of 70 to 110 degrees, preferably 80 to 100 degrees, particularly preferably 90 degrees, with respect to a surface of the pull or push rod or a surface of an imaginary core hole of the locking nut.

4. The pull or push rod or locking nut according to claim 1, wherein the at least one first or the at least one second transition curvature transitions tangentially into the undercut base, preferably transitions tangentially into the curvature of the undercut base.

5. The pull or push rod or locking nut according to claim 1, wherein between the at least one first and/or the at least one second transition curvature and the undercut base, a straight-lined section is provided as viewed in the undercut cross-section.

6. The pull or push rod or locking nut according to claim 1, wherein the undercut ramp, viewed in the undercut cross-section, is designed straight-lined, and has an angle () with respect to a surface of the pull or push rod or a surface of an imaginary core hole of the locking nut of 175 to 150 degrees, preferably 170 to 160 degrees, particularly preferably 165 degrees.

7. The pull or push rod or locking nut according to claim 1, wherein a radius of an imaginary curvature circle at at least one point of the curvature of the undercut base has a finite value greater than zero, which differs from a radius of an imaginary curvature circle at at least one point of the at least one first transition curvature and/or from an imaginary curvature circle at at least one point of the at least one second transition curvature.

8. The pull or push rod or locking nut according to claim 1, wherein the at least one first transition curvature is designed as a first transition radius, and the at least one second transition curvature is designed as a second transition radius.

9. The pull or push rod or locking nut according to claim 1, wherein the at least one second transition radius is in a ratio of 20 to 2, preferably in a ratio of 7 to 4, particularly preferably in a ratio of 5.5, with respect to the at least one first transition radius.

10. The pull or push rod or locking nut according to claim 1, wherein the curvature of the undercut base is designed as a radius.

11. The pull or push rod or locking nut according to claim 8, wherein the value of the radius of the undercut base is in a ratio to the at least one first transition radius of 10 to 1, preferably in a ratio of 5 to 2, particularly preferably in a ratio of 3.6.

12. The pull or push rod according to claim 1, wherein the pull or push rod has a rotationally symmetrical base body.

13. A clamping unit of a molding machine or molding machine having a clamping unit with at least one pull or push rod according to claim 1, and/or at least one locking nut.

14. A method for producing a pull or push rod or a locking nut for a molding machine, comprising at least the following steps: specification of a desired pulling or compressive force which is transferable non-destructively by the pull or push rod or the locking nut selection of a suitable material for the pull or push rod or the locking nut specification of a suitable undercut geometry, wherein the at least one undercut has an undercut cross-section, a side wall and an undercut ramp, wherein the side wall transitions into an undercut base via at least one first transition curvature, and the undercut base transitions into the undercut ramp via at least one second transition curvature, wherein the undercut base, viewed in the undercut cross-section, is formed at least partially as a curvature, wherein the curvature of the undercut base differs from the at least first and/or the at least second transition curvature, in particular according to claim 1 specification of the minimum diameter of the pull or push rod or locking nut resulting from the desired pull or push rod or locking nut, the desired material and the specified undercut geometry manufacturing of the pull or push rod or the locking nut with the specified diameter and the specified undercut geometry from the specified material.

15. The method for producing a pull or push rod or locking nut for a molding machine according to claim 14, wherein, in order to determine a suitable undercut geometry, a cross-section notch, separate from the undercut, of the pull or push rod or the locking nut is taken into account.

16. The method for producing a pull or push rod or locking nut for a molding machine according to claim 14, wherein the pull or push rod or locking nut is subjected to a coating process.

17. The method for producing a pull or push rod or locking nut for a molding machine according to claim 14, wherein the pull or push rod or locking nut is subjected to a method for changing the material properties.

18. The method for producing a pull or push rod or locking nut for a molding machine according to claim 14, wherein the pull or push rod or locking nut is produced by means of a forming process.

19. The method for producing a pull or push rod or locking nut for a molding machine according to claim 14, wherein the pull or push rod or locking nut is produced by means of a machining process.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0040] Different embodiments of the invention derive with the help of the FIGURE and the corresponding FIGURE description. Therein, FIG. 1 shows a purely exemplary embodiment of a pull or push rod or locking nut according to the invention with an undercut.

DETAILED DESCRIPTION OF THE INVENTION

[0041] FIG. 1 shows a partial view of a pull or push rod or locking nut according to the invention with an undercut 1 in cross-section (in undercut cross-section). The undercut 1 is formed by a side wall 2, an undercut base 4, and an undercut ramp 3. Here the side wall 2 transitions tangentially into a first transition curvature (in this embodiment shown as transition radius R1), which in turn transitions tangentially into the curvature of the undercut base 4 (which in this embodiment is designed by the radius R2). The undercut base 4 or the radius R2 transitions tangentially into the second transition. This second transition is hereby designed two-part. First, by a straight-lined section 5, which is directly adjacent to the undercut base 4, which in turn transitions tangentially into the transition curvature (shown here as transition radius R3), which connects the straight-lined undercut ramp 3 tangentially. The undercut ramp 3 is inclined at an angle to the surface of the pull or push rod or to the surface of an imaginary core hole of the locking nut. The entire undercut has an undercut length 6 and an undercut depth 7. This undercut depth 7 and undercut length 6 can be varied depending on the area of application and loads.

[0042] This FIGURE shows clearly that the design of the undercut base 4 as radius R2 allows to reduce the notch effect by the transition radii without this causing a significant deepening of the undercut 1.

LIST OF REFERENCE SIGNS

[0043] 1 undercut [0044] 2 side wall [0045] 3 undercut ramp [0046] 4 undercut base [0047] 5 straight-lined section [0048] 6 undercut length [0049] 7 undercut depth [0050] R1 transition radius [0051] R2 radius [0052] R3 transition radius [0053] angle