JPS5823810B2 - Deforming device in metal lid screw forming machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a forming device in a thread forming machine for metal lids used for bottles and other containers.

Conventionally, this type of thread forming machine has an inner molding member and an outer molding member, each having a thread forming groove formed around the periphery, and a metal lid material is fitted into the cylindrical inner molding member, and the inner molding member and the outer molding member are connected to each other. In general, the thread forming grooves of the molded member are engaged with each other to form a thread in the lid material, and in this case, the metal lid that has been thread-formed is removed from the inner molded member. During molding, the knockout pin was simply used to push it down, so the outer diameter of the inner molded member had to be made much smaller than the inner diameter of the metal lid material.As a result, the metal lid material moved during molding, requiring a precise screw thread. There was a drawback that it was not possible to perform strip forming processing, and that it was not possible to perform thread forming of two or more threads.

The present invention aims to eliminate the above-mentioned drawbacks by improving the means for forming the metal lid material that has undergone the thread forming process. a molded member, a metal lid material is fitted into the cylindrical inner molded member, and the thread forming grooves of the inner molded member and the outer molded member are engaged with each other to form a thread in the lid material. In such a device, the direction of rotation of the inner molded member during the thread forming operation is the direction in which the lid material fitted to the inner molded member is pulled out, and the outer diameter of the inner molded member is set to be the direction in which the lid material fitted to the inner molded member is pulled out. A movable member is provided on one axial side of the inner molded member and moves forward to fit the metal lid material onto the inner molded member, and the movable member is provided on the other axial side of the inner molded member. A dosing member is provided which clamps and fixes the metal lid material after thread forming between the members and moves with the return movement of the movable member.

Embodiments of the present invention will be explained with reference to the attached drawings. In FIGS. 1 and 2, reference numeral 1 indicates a thread forming machine for metal lid material 2, and the thread forming machine 1 includes, for example, as shown in FIG. 6. The metal lid material 2 that has been subjected to curling and other pretreatment steps is sequentially fed from the supply coolet 4 above the opening 6, and here the metal lid material 2 is threaded with threads 5 to form the shape shown in Figure 7. It becomes a metal lid 6 like this and is sent out from the discharge turret 7.

The thread forming machine 1 has a cylindrical inner forming member 10 in the downward direction.
, a transfer member 11 provided below the inner molded member 10 so as to be able to reciprocate up and down with its central axis aligned with the inner molded member 10; and an outer molded member provided on the side of the inner molded member 10 and approximately fan-shaped when viewed from a plane. 12, and an annular pressing member 13 whose central axis coincides with the upper part of the inner molded member 10.

The inner molding member 10 is provided at the lower end of a spindle 17 that vertically passes through a rolling cylinder 16 rotatably attached to a fixed shaft 15 perpendicular to the machine base 14 .

At the upper end of the spindle 17 is a fixed shaft 1 above the rolling cylinder 16.
A small gear 19 is provided which meshes with a large gear 18 provided integrally with the fixed shaft 15, and when a driving gear 20 provided rotatably relative to the fixed shaft 15 below the fixed shaft 15 is rotated, the rotary disk 21 and the small gear 19 are connected to each other. A rolling cylinder 16 connected via a rod 22 rotates around a fixed shaft 15.

Therefore, the spindle 17 and the inner molded member 10, which are integral with the small gear 19, rotate in the same way as the small gear 19, which rotates on its own axis while revolving around the large gear 18.

The rolling cylinder 16 is provided with, for example, eight sets of inner molding members 10, spindles 17, and small gears 19.

The transfer member 11, as seen in FIGS. 2 and 3,
A cylindrical assembly 23 that is vertically movable up and down on the rotary disk 21
The cylindrical assembly 23 has a roller shaft 2 laterally provided at its lower part.
1 fixed to the machine base 14 via the rollers 26 and 27 of 5.
It comes into contact with a pair of cams 2829.

Both cams 28 and 29 are arranged annularly around the fixed shaft 15, one cam 28 abuts the roller 26 from below, the other cam 29 abuts the roller 27 from above, and the cylindrical assembly 23 It is arranged to move up and down along the curves of the cams 28 and 29.

The cam curves of both cams 2B, 29 raise the transfer member 11 at a position immediately after the metal lid material 2 is fed from the supply turret 4 shown in the first diagram, and at a position in front of the discharge turret 7. It is formed to lower the transfer member 11.

Reference numeral 30 denotes a buffer spring that cushions the collision between the transfer member 11 and the inner molded member 10.

The outer molded member 12 consists of a cylindrical mounting portion 32 that is inserted into and fixed to the fixed shaft 15 with a key 31, and a molded portion 33 that expands in a fan shape around the fixed shaft 15. A threaded groove 35 is formed that engages with the threaded groove 34 formed on the surface of the inner molded member 10, and the transfer member 11
As a result, the inner molded member 10 fitted with the metal lid material 2 slides around the outer molded member 12 and rotates, thereby forming a thread 5 around the metal lid material 2.

Similarly, the rotation direction of the inner molded member 10 was set in the direction in which the lid material 2 fitted onto the inner molded member 10 was pulled out from the inner molded member 10.

Reference numeral 36 denotes a fixed shaft 1 for fixing the inner molding member 10, the rolling cylinder 16 provided with the spindle 17, etc., the large gear 18, and the outer molding member 12.
This is a fine adjustment handle that allows minute movements up and down along 5.

As shown in FIGS. 2, 4, and 5, the pressing member 13 is constituted by an annular member provided surrounding a guide roll 37 rotatably provided on the spindle 17 above the inner molded member 10, The pressing member 13 has a pair of pins 38.38.
The rolling cylinder 16 is connected to the rolling cylinder 16 via the forked arm piece 39 that is locked by the
The knockout spindle 40 is attached to a knockout spindle 40 that is movable up and down.

The knockout spindle 40 is lifted by a spring 41 so that it always remains in the upper position, and the upper end of the spindle 40 is moved through a roller 42 provided thereon to a knockout cam provided in an annular shape along the lower surface of the large gear 18. 4
I made it touch 3.

The knockout cam 43 has its cam protrusion 43a when the inner molded member 10 comes off from the outer molded member 12 and the metal lid material 2
Between the position where the forming of the thread 5 is completed and the position immediately before the discharge turret 7, a cam 2B, which has the same shape as the curve of the cams 2B and 29 on the side that lowers the transfer member 11, gradually protrudes downward. When the knockout spindle 40 rotates below the cam protrusion 43a, it is pushed down, and the annular suppressing member 13 is pressed against the spindle 1.
7 from around the guide roll 37 to around the inner molded member 10 .

In this case, the pressing member 13 comes into contact with the upper edge of the metal lid material 2 after forming the thread 5 fitted around the inner molded member 10, and the pressing member 13 comes into contact with the lower surface of the material 2. While holding the metal lid material 2 between the base 11 and the base 11, the metal lid material 2 is moved downward.

The inner molded member 10 continues to rotate by the small gear 19 that rotates around the large gear 18, but the direction in which the thread 5 formed on the metal lid material 2 is pulled out is relative to the direction of rotation. The inner molded member 10 and the outer molded member 1
Since the two screw forming grooves 34 and 35 are provided, when the metal lid material 2 is sandwiched between the transfer member 11 and the pressing member 13, the metal lid material 2 and the inner molded member 10 are not fitted together. slack,
The metal lid material 2 is molded from the inner molding member 10 by the transfer member 11 and the pressing member 13, which move downward according to the amount of loosening.

Reference numeral 44 indicates an eccentric cylinder inserted into the spindle 17, whose center through hole 45 is eccentric with respect to the insertion hole 46 of the rolling cylinder 16,
When the eccentric cylinder 44 is rotated by a worm gear 47 provided on the rolling cylinder 16, the spindle 17 is moved in the radial direction within the rolling cylinder 16, and the thread forming grooves 34 of the inner molding member 10 and the outer molding member 12 are formed. 35 occlusal conditions are adjusted.

The cylindrical assembly 23 of the transfer member 11 also has a through hole 49 in the outer cylinder 48.
An eccentric cylinder 51 having an insertion hole 50 for the transfer member 11 eccentric from the center is provided, and by rotating the eccentric cylinder 51, the transfer member 11 is adjusted to a position that coincides with the central axis of the inner molded member 10. be done.

To explain the operation of the apparatus of the present invention, the metal lid material 2 is sequentially fed into the screw forming machine 1 from the supply turret 4 with the opening 3 facing upward.
The transfer member 1 is fed onto a turntable 21 rotating together with the drive gear 20 of the transfer member 1 and is controlled by a lower cam 28, 29 so as to remain flush with the turntable 21 in the feeding position.
It is sent to the top surface of 1.

Before reaching the end of the sector-shaped outer molding part 12, the metal lid material 2 is fitted onto the inner molding part 10 above it by means of a transfer element 11 which is projected by a cam 28, 29 from the turntable 21.

The inner molded member 10 rotates and revolves around the fixed shaft 15 together with the rotary disk 21, and when the inner molded member 10 engages its threaded groove 34 with the threaded groove 35 of the outer molded member 12, the metal A thread 5 is formed on the side surface of the lid material 2.

When the rotary disk 21 and the inner molded member 10 further rotate and come off the fan-shaped outer molded member 12, the knockout spindle is removed by the action of the knockout cam 43 provided on the lower surface of the upper large gear 18 and the lower cams 28 and 29 of the transfer member 11. 4
0 moves down from the rolling cylinder 16, the cylindrical assembly 23 is moved down, and gradually descends while holding the metal lid material 2 between the pressing member 13 and the transfer member 11.

As a result of this operation, the rotation of the metal lid material 2 that had been rotating and revolving together with the inner molded member 10 until then is stopped, and only the inner molded member 10 rotates, so that the metal lid material 2 is moved downward along the threaded groove 34 of the inner molded member 10. molded.

The formed metal lid material 2 is placed on the rotary disk 21 again by the lowering of the transfer member 11, and is sent out from the screw forming machine 1 by the discharge turret 7.

As described above, according to the present invention, the outer diameter of the inner molded member is formed to be slightly smaller than the metal lid material, and the transfer member and the pressing member are disposed therebetween in the axial direction of the inner molded member,
By raising the transfer member, the metal lid material is fitted onto the inner molded member, and by lowering the transfer member together with the pressing member, the tightly attached lid material is pulled out by the rotational action of the inner molded member. Since the metal lid material on which the threads have been formed can be removed, even if the threads are formed on the metal lid material with almost the same dimensions as the inner molded member, they can be automatically removed from the molded member. Since there is no dimensional difference between the inner molded member and the metal lid material, precise thread forming can be performed, and a large number of threads can be formed.

[Brief explanation of drawings]

Fig. 1 is an overall plan view of an embodiment of the device of the present invention, Fig. 2 is a cross-sectional view taken along the line An enlarged cross-sectional view of the outer molded member and the pressing member, FIG. 5 is a bottom view taken along line v-v in FIG. 4, and FIGS. 6 and 7 show the metal before and after thread forming, respectively. FIG. 3 is a perspective view of the lid material. 2...Metal lid material, 10...Inner molded member, 11...Transfer member, 12...Outer molded member, 13... Pressing member.

Claims (1)

[Claims] 1.Equipped with an inner molded member and an outer molded member each having a threaded groove formed around the periphery, a metal lid material is fitted into the cylindrical inner molded member, and each threaded molded member is formed on the inner molded member and the outer molded member. In the case where the grooves are engaged with each other to form a thread on the lid material, the direction of rotation of the inner molded member during the thread forming operation is such that the lid material fitted into the inner molded member is pulled out. direction, the outer diameter of the inner molded member is made slightly smaller than the inner diameter of the metal lid material, and the metal lid material is reciprocated on one side in the axial direction of the inner molded member to fit into the inner molded member. A metal lid is provided with a movable member on the other side in the axial direction, and a suppressing member is provided on the other side in the axial direction to clamp and fix the metal lid material after thread forming between the movable member and move with the return movement of the movable member. Forming equipment in a screw forming machine.