CN109692905B

CN109692905B - Forming die for seat height adjusting transmission parts

Info

Publication number: CN109692905B
Application number: CN201910149365.3A
Authority: CN
Inventors: 代罡; 刘少强
Original assignee: Chongqing Yanfeng Adient Fendhao Automotive Components Co Ltd
Current assignee: Chongqing Andao Tuofengao Auto Parts System Co ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-07-28
Anticipated expiration: 2039-02-28
Also published as: CN109692905A

Abstract

A seat height adjusting transmission piece forming die comprises a lower fixed die and an upper movable die, wherein the lower fixed die is provided with a lower die block, a stamping column is vertically arranged on the upper movable die, a shaft hole is vertically arranged on the lower die block, the shaft hole is opened on the upper surface of the lower die block, and the shaft hole is opposite to the stamping column; the upper surface of the lower fixed die is also provided with a set square positioning mechanism which is provided with a set square positioning area, and the set square positioning area is positioned above the shaft hole; still be equipped with high support locating component on the lower cover half upper surface, this high support locating component is equipped with the high support and places the district, and this high support is placed the district and is located set square locating area top. The method has the advantages that each pre-formed workpiece is accurately positioned and placed on the die, then the movable die moves upwards and downwards, the stamping column stamps the prefabricated part, so that the rotating shaft part and the triangular plate are tightly connected, and the high-tone transmission part is obtained through assembly forming.

Description

Forming die for seat height adjusting transmission parts

Technical Field

The invention relates to a die, in particular to a forming die for a seat height adjusting transmission part.

Background

The high-tone function of the automobile seat is an important component for determining the comfort of the seat, and the performance of the high-tone function has important influence on the quality of the seat. The reliability and sensitivity of the high-tuning structure depend on reasonable structural design and the processing quality of parts. As one of the core parts of the height adjusting structure, the height adjusting transmission part is installed on the side plate of the seat frame, is meshed with the height adjusting toothed plate through a gear to drive the height adjusting connecting rod to ascend and descend, and is linked with the manual adjusting handle or the electric adjusting mechanism to realize the transmission of the height adjustment of the seat. The height adjusting transmission part comprises a height adjuster bracket and a rotating shaft arranged on the height adjuster bracket in a penetrating way. To novel accent driving medium, the pivot still is connected with synchronous pivoted triangle-shaped board, sets up limit structure between triangle-shaped board and the accent ware support of height, is equipped with the connecting hole that passes through the connecting rod with adjustment mechanism on the triangle-shaped board and links to each other.

The high-tone transmission part is stressed greatly and has high rotation frequency in a working state. Therefore, the processing mode greatly influences the quality of the product. The prior art generally adopts a single workpiece to be pre-formed, and then adopts welding and other modes to finish assembly. The production efficiency is low, the product stability needs to be improved, and a production device and a method aiming at a novel high-tone transmission part are lacked.

Disclosure of Invention

In order to solve the technical problems, the invention provides a forming die for a high-tone transmission part of a seat, which can realize high-quality assembly forming of the high-tone transmission part and has stable and reliable product quality.

The technical scheme is as follows:

the key point is that a shaft hole is vertically formed in the lower module, the shaft hole is opened on the upper surface of the lower module, and the shaft hole is over against the stamping column;

a set square positioning mechanism is further arranged on the upper surface of the lower fixed die and provided with a set square positioning area, and the set square positioning area is positioned above the shaft hole;

still be equipped with high support locating component on the lower cover half upper surface, this high support locating component is equipped with the high support and places the district, and this high support is placed the district and is located set-square locating area top.

The design more than adopting, place preformed set-square and height transfer support in proper order on the shaft hole to fix a position the installation through set-square positioning mechanism and height transfer support locating component respectively, then place the packing ring again, insert pivot spare at last and make its lower extreme stretch into in the shaft hole, go up the movable mould afterwards and go up the movable mould down, the punching press post carries out the punching press to the prefab, thereby make zonulae occludens between pivot spare and the set-square, thereby assembly moulding obtains the height transfer driving medium, this method production efficiency is high, and the product quality is stable.

As a preferred technical scheme, the triangle positioning mechanism comprises three positioning blocks arranged on the upper surface of the lower module, the three positioning blocks are distributed in a triangular shape around the hole center line of the shaft hole, arc-shaped positioning notches are respectively arranged on the three positioning blocks, and the area enclosed by the three positioning blocks forms the triangle positioning area.

By adopting the design, the three positioning blocks correspond to the three protruding parts of the triangular plate respectively, so that the triangular plate is convenient to position accurately, the reserved hole connected with the rotating shaft on the triangular plate is right aligned to the shaft hole of the lower module, and the parts can be conveniently placed and taken.

As a preferred technical scheme, the height-adjustable support positioning assembly comprises a positioning plate and a positioning support arranged on the lower module;

the positioning plate and the positioning support are arranged oppositely and distributed on two sides of the shaft hole, and the region between the positioning plate and the positioning support forms the height-adjusting support placing region.

The design more than adopting is favorable to the accurate positioning of height to transfer the support, and stamping process remains stable for the hole that is used for wearing to establish the pivot on the height transfers the axle hole of module under the accurate counterpoint of hole, need not the centre gripping, is convenient for put the piece and gets the piece.

As a preferred technical scheme, the number of the positioning plates is two, the two positioning plates are vertically arranged on the upper surface of the lower module, the vertical surfaces of the positioning plates facing the shaft hole are limiting surfaces, and the limiting surfaces of the two positioning plates are close to each other and form an included angle;

the positioning support comprises a supporting block, and a positioning pin is vertically arranged on the supporting block;

and a height-adjusting bracket limiting block groove is formed in the upper surface of the lower module between the two positioning blocks.

By adopting the design, one foot plate used for being connected with the seat frame side plate on the height adjusting support is limited by the two limiting surfaces, the connecting hole on the other foot plate is sleeved on the positioning pin, and the height adjusting support limiting block falls into the limiting block groove, so that the whole part is accurately positioned.

As a preferred technical scheme, the lower fixed die comprises a lower die holder, the lower die holder is provided with the lower die block, the lower die block comprises a lower die cushion block, a lower die insert and a retainer plate which are arranged from bottom to top, the lower die cushion block falls on the lower die holder, the lower die insert is arranged on the lower die cushion block, the retainer plate is horizontally arranged above the lower die insert, columnar lower die blocks vertically penetrate through the centers of the lower die insert and the retainer plate, the upper end surfaces of the lower die blocks are level with the upper surfaces of the retainer plate, and the lower end surfaces of the lower die blocks fall on the lower die cushion block;

the upper surface of the material supporting plate forms the upper surface of the lower module;

the shaft hole penetrates through the middle part of the lower model block.

By adopting the design, the area of the material supporting plate is large, each pre-forming part of the height adjusting transmission part is convenient to arrange on the upper surface of the material supporting plate, the space required by the rotating shaft part is small, and therefore the lower die cushion block and the lower die insert with small sizes are used, the weight of the die is reduced, the lower die assembled by a plurality of functional blocks can meet the requirement of placing a workpiece to be machined, the design and the processing of the die are simplified, and a plurality of functional blocks can be replaced according to the requirement of actual production.

As a preferred technical scheme, an elastic jacking piece is arranged in the lower mould block, the elastic jacking piece is positioned below the shaft hole, and the upper end of the elastic jacking piece extends into the shaft hole;

the inner wall of the shaft hole is provided with an internal spline.

Design more than adopting, the internal spline of shaft hole inner wall and the external spline phase-match of pivot carry out the direction to it and prescribe a limit to, set up the part of taking out after the punching press equipment shaping of being convenient for of elasticity jacking piece.

As a preferred technical scheme, the edge of the retainer plate exceeds the edge of the lower die insert, and a retainer plate guide post and an elastic supporting piece are arranged between the retainer plate and the lower die base;

the upper end of the material supporting plate guide column is connected with the material supporting plate, and the lower end of the material supporting plate guide column movably penetrates into the lower die base;

the elastic supporting piece is fixed on the lower die base;

the lower die base is also provided with a material supporting plate limiting column, the material supporting plate limiting column is vertically arranged, and the upper end of the material supporting plate limiting column faces the material supporting plate;

the upper movable die comprises an upper die base, the punching column is connected to the lower portion of the middle of the upper die base, a lower pressing column is arranged on the upper die base and is opposite to each elastic supporting piece and each retainer plate limiting column, and the lower end of each lower pressing column faces the retainer plates.

By adopting the design, the elastic supporting piece plays a role in buffering and supporting the material supporting plate, when the material supporting plate descends along the lower model block, the material supporting plate guide column plays a role in guiding, the material supporting plate guide column is beneficial to keeping stable, and the material supporting plate limiting column limits the stroke of the material supporting plate; the pressure of the lower pressing column is transmitted to the elastic supporting piece or the material supporting plate limiting column below through the material supporting plate, so that the pressure of the material supporting plate is more balanced.

As an optimal technical scheme, the material supporting plate guide posts, the elastic supporting pieces and the material supporting plate limiting posts are respectively provided with at least two material supporting plates and are uniformly distributed around the shaft holes.

By adopting the design, the balance of the retainer plate is kept.

According to the preferable technical scheme, a protection plate is vertically arranged on the lower die base and is positioned outside the material supporting plate, and the upper edge of the protection plate is close to the upper die base.

By adopting the design, the processed workpiece is prevented from flying out under the unexpected condition.

As a preferred technical scheme, at least two stamping guide posts are arranged between the lower die base and the upper die base, and all the stamping guide posts are uniformly distributed around the retainer plate;

at least two downward pressing limiting columns are evenly arranged between the lower die base and the upper die base, the downward pressing limiting columns surround the retainer plate and are vertically arranged, each downward pressing limiting column comprises a limiting column lower section and a limiting column upper section, the limiting column lower section is fixedly arranged on the lower die base, and the limiting column upper section is fixedly arranged on the upper die base.

By adopting the design, the stamping guide post plays a guiding role in guiding the upper moving die so as to enable the movement of the upper moving die to be more stable, and the pressing limiting post plays a limiting role in limiting the movement low point of the upper moving die so as to prevent the upper moving die from excessively descending.

Has the advantages that: the method has the advantages that each pre-formed workpiece is accurately positioned and placed on the die, then the movable die moves upwards and downwards, the stamping column stamps the prefabricated part, so that the rotating shaft part and the triangular plate are tightly connected, and the high-tone transmission part is obtained through assembly forming.

Drawings

FIG. 1 is a schematic view of a high-tuning transmission member;

FIG. 2 is a schematic view of the relative positions of the components of the high-lift actuator during assembly;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a schematic perspective view of FIG. 3;

FIG. 6 is a schematic view of the clamped condition of FIG. 5;

FIG. 7 is a perspective view of the lower stationary mold;

FIG. 8 is a schematic perspective view of another perspective of the lower stationary mold;

FIG. 9 is an enlarged view of portion m of FIG. 8;

FIG. 10 is a top view of the lower stationary mold;

FIG. 11 is a schematic view of the heightened transmission member of FIG. 7 as it is placed on the die;

fig. 12 is a sectional view taken along line a-a in fig. 11.

Detailed Description

The invention is further illustrated by the following examples and figures.

As shown in fig. 1 and 2, the height adjusting transmission member c includes a height adjuster bracket c2 and a rotating shaft c5 penetrating through the height adjuster bracket c2, and the rotating shaft c5 is further connected with a triangular plate c1 which rotates synchronously. One end of the rotating shaft c5 is provided with a rotating shaft cap which is positioned in the recess of the high-governor bracket c2, a washer c4 is arranged between the rotating shaft cap and the high-governor bracket c2, the other end of the rotating shaft c5 penetrates through the high-governor bracket c2 and is connected with a triangular plate c1, and the triangular plate c1 and the rotating shaft cap are respectively positioned at two sides of the high-governor bracket c2, so that the rotating shaft c5 is rotatably assembled on the high-governor bracket c 2. The edge of the triangular plate c1 is also provided with two limit lugs, and the height adjuster bracket c2 is provided with a limit stop which is positioned between the two limit lugs to limit the rotating position of the triangular plate c 1.

As shown in fig. 3 to 6, the forming die for the seat height adjusting transmission piece comprises a lower fixed die a and an upper movable die b, wherein the lower fixed die a is provided with a lower die block 200, the upper movable die b is vertically provided with a stamping column 300, the lower die block 200 is vertically provided with a shaft hole 241, the shaft hole 241 is opened on the upper surface of the lower die block 200, and the shaft hole 241 is opposite to the stamping column 300. The lower module 200 is provided with a positioning assembly for placing and positioning a single workpiece for stamping and assembling.

The lower fixed die a comprises a lower die holder 100, the lower die block 200 is arranged on the lower die holder 100, the lower die block 200 comprises a lower die cushion block 230, a lower die insert 220 and a retainer plate 210 which are arranged from bottom to top, the lower die cushion block 230 falls on the lower die holder 100, the lower die insert 220 is arranged on the lower die cushion block 230, and the retainer plate 210 is horizontally arranged above the lower die insert 220. The centers of the lower die insert 220 and the retainer plate 210 are vertically penetrated with a columnar lower die block 240, the upper end of the lower die block 240 is level with the retainer plate 210, and the lower end of the lower die block 240 falls on the lower die cushion block 230, and the middle of the lower die block 240 penetrates through the shaft hole 241.

The upper surface of the retainer plate 210 forms the upper surface of the lower module 200, and the retainer plate 210 is provided with the positioning assembly.

The upper moving die b comprises an upper die holder 400, and the punching column 300 is connected to the lower part of the middle part of the upper die holder 400.

At least two stamping guide posts 700 are arranged between the lower die holder 100 and the upper die holder 400, and all the stamping guide posts 700 are uniformly distributed around the retainer plate 210, so that the movement of the upper moving die b is more stable.

At least two downward pressing limiting columns 800 are further uniformly arranged between the lower die base 100 and the upper die base 400, all the downward pressing limiting columns 800 are vertically arranged around the retainer plate 210, each downward pressing limiting column 800 comprises a limiting column lower section 810 and a limiting column upper section 820, the limiting column lower section 810 is fixedly arranged on the lower die base 100, and the limiting column upper section 820 is fixedly arranged on the upper die base 400. The downward pressing limiting column 800 plays a role in limiting the movement low point of the upper moving die b and prevents the upper moving die b from excessively descending.

A protection plate 280 is also vertically arranged on the lower die holder 100, the protection plate 280 is positioned outside the retainer plate 210, and the upper edge of the protection plate 280 is close to the upper die holder 400.

As shown in fig. 7, the edge of the retainer plate 210 exceeds the edge of the lower die insert 220, and a retainer plate guide 250 and an elastic support 260 are disposed between the retainer plate 210 and the lower die base 100. The upper end of the retainer plate guide post 250 is connected to the retainer plate 210, and the lower end thereof movably penetrates the lower die holder 100. The elastic supporting member 260 is fixed on the lower die holder 100.

The lower die holder 100 is further provided with a retainer plate limiting column 270, the retainer plate limiting column 270 is vertically arranged, and the upper end of the retainer plate limiting column 270 faces the retainer plate 210.

The retainer plate guide posts 250, the elastic supporting members 260 and the retainer plate limiting posts 270 are respectively provided with at least two and are uniformly distributed around the shaft hole 241.

Specifically, the elastic support 260 is a nitrogen cylinder, and plays a role of buffering and supporting the retainer plate 210. When not pressed, a certain gap exists between the lower surface of the retainer plate 210 and the lower die insert 220. The retainer plate guide posts 250 guide as the retainer plate 210 descends along the lower mold block 240. The retainer plate limiting column 270 limits the lowest point of the retainer plate, and when no pressure is applied, the lower surface of the retainer plate 210 is higher than the upper end of the retainer plate limiting column 270.

As shown in fig. 3 to 6, a lower pressing column 410 is respectively disposed on the upper die holder 400 opposite to each of the elastic supporting members 260 and the retainer plate spacing column 270, and a lower end of the lower pressing column 410 faces the retainer plate 210. Therefore, the pressure applied to the retainer plate 210 by the upper moving die b is more balanced, and the pressure of the lower pressing column 410 is transmitted to the elastic supporting member 260 or the retainer plate limiting column 270 below through the retainer plate 210, so that the retainer plate 210 is prevented from being damaged by pressure.

As shown in fig. 7, 8, 9 and 10, the positioning assembly includes a set square positioning mechanism 500 and a high-pitched bracket positioning assembly provided on the upper surface of the lower fixed mold a.

The set square positioning mechanism 500 is provided with a set square positioning area, which is located above the shaft hole 241. The triangle positioning mechanism 500 comprises three positioning blocks 510 arranged on the upper surface of the lower module 200, the positioning blocks 510 are distributed in a triangular mode around the hole center line of the shaft hole 241, the positioning blocks 510 are three, arc-shaped positioning notches 511 are respectively arranged on the positioning blocks 510, and the three positioning blocks 510 form a triangle positioning area.

The height adjusting support positioning assembly is provided with a height adjusting support placing area, and the height adjusting support placing area is located above the set square positioning area. The height-adjustable support positioning assembly comprises a positioning plate 610 and a positioning support 620 which are arranged on the lower module 200; the positioning plate 610 and the positioning support 620 are oppositely arranged and distributed on two sides of the shaft hole 241, and the region between the positioning plate 610 and the positioning support 620 forms the high-tone support placing region.

The locating plate 610 has two, two the locating plate 610 is established immediately the upper surface of lower module 200, the locating plate 610 orientation the vertical face of shaft hole 241 is spacing face, two the spacing face of locating plate 610 is close to mutually and forms the contained angle. A height-adjustable bracket limiting block groove 223 is formed on the upper surface of the lower module 200 between two of the positioning blocks 510.

The positioning support 620 includes a support block 621, and a positioning pin 622 is vertically disposed on the support block 621.

In production, the workpieces are placed in the order shown in fig. 2, the triangular plate c1 is placed, and the reserved hole of the triangular plate c1 is opposite to the shaft hole 241. Then, the height-adjustable bracket is placed, as shown in fig. 11, the larger foot plate of the height-adjustable bracket is located between the two positioning plates 610, the smaller foot plate is located on the supporting block 621, the positioning pin 622 is inserted into the mounting hole of the smaller foot plate, and the preformed hole of the height-adjustable bracket is also opposite to the preformed hole of the triangular plate c 1. Then, a lubricating oil film c3 and a washer c4 are placed, and finally, the rotating shaft c5 penetrates through the reserved holes, and the front end of the rotating shaft c5 extends into the shaft hole 241.

As shown in fig. 11 and 12, the shaft hole 241 penetrates through the middle of the lower mold block 240. An elastic jacking piece 290 is arranged in the lower die cushion block 230, the elastic jacking piece 290 is located below the shaft hole 241, the upper end of the elastic jacking piece 290 extends into the shaft hole 241, and an inner spline is arranged on the inner wall of the shaft hole 241. Specifically, the elastic jacking piece 290 may use a pressure spring, the lower end of the pressure spring is fixed to the lower die holder through a mounting block, and the upper end of the pressure spring is provided with a jacking pin. Thus, the free end of the rotating shaft c5 falls on the upper end of the knock pin after being put in.

When the press is used, the end of the rotating shaft c5 on the rotating shaft cap is stressed, and the part of the rotating shaft c5 close to the rotating shaft cap is slightly larger in size, so that the part is pressed into the preformed hole of the triangular plate c1 and deforms the preformed hole of the triangular plate c1, and the two parts are connected in a press riveting mode without relative rotation or movement. After the punching assembly is completed, the part is jacked up under the action of the elastic jacking piece 290, and is convenient to take out.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a high driving medium forming die of transferring of seat, includes cover half (a) and last movable mould (b) down, cover half (a) is equipped with down module (200) down, go up vertical punching press post (300) that are equipped with on movable mould (b), its characterized in that: the lower module (200) is vertically provided with a shaft hole (241), the shaft hole (241) is opened on the upper surface of the lower module (200), and the shaft hole (241) is opposite to the stamping column (300);

the upper surface of the lower fixed die (a) is also provided with a set square positioning mechanism (500), the set square positioning mechanism (500) is provided with a set square positioning area, and the set square positioning area is positioned above the shaft hole (241);

a height-adjusting support positioning component is further arranged on the upper surface of the lower fixed die (a), a height-adjusting support placing area is arranged on the height-adjusting support positioning component, and the height-adjusting support placing area is located above the set square positioning area;

the triangular plate positioning mechanism (500) comprises three positioning blocks (510) arranged on the upper surface of the lower module (200), the three positioning blocks (510) are distributed in a triangular shape around the hole center line of the shaft hole (241), arc-shaped positioning notches (511) are respectively arranged on the three positioning blocks (510), and the triangular plate positioning area is formed by the area surrounded by the three positioning blocks (510);

the height-adjustable support positioning assembly comprises a positioning plate (610) and a positioning support (620) which are arranged on the lower module (200);

the positioning plate (610) and the positioning support (620) are oppositely arranged and distributed on two sides of the shaft hole (241), and an area between the positioning plate (610) and the positioning support (620) forms a high-adjustment support placing area;

the number of the positioning plates (610) is two, the two positioning plates (610) are vertically arranged on the upper surface of the lower module (200), the vertical surface of each positioning plate (610) facing the shaft hole (241) is a limiting surface, and the limiting surfaces of the two positioning plates (610) are close to each other and form an included angle;

the positioning support (620) comprises a support block (621), and a positioning pin (622) is vertically arranged on the support block (621);

a height-adjusting bracket limiting block groove (223) is formed in the upper surface of the lower module (200) between two of the positioning blocks (510);

the lower fixed die (a) comprises a lower die holder (100), the lower die holder (100) is provided with the lower die block (200), the lower die block (200) comprises a lower die cushion block (230), a lower die insert (220) and a material supporting plate (210) which are arranged from bottom to top, the lower die cushion block (230) falls on the lower die holder (100), the lower die insert (220) is arranged on the lower die cushion block (230), the material supporting plate (210) is horizontally arranged above the lower die insert (220), a columnar lower die block (240) vertically penetrates through the centers of the lower die insert (220) and the material supporting plate (210), the upper end surface of the lower die block (240) is level with the upper surface of the material supporting plate (210), and the lower end surface of the lower die block (240) falls on the lower die cushion block (230);

the upper surface of the retainer plate (210) forms the upper surface of the lower module (200);

the shaft hole (241) penetrates through the middle part of the lower model block (240).

2. A seat height transmission member forming die according to claim 1, wherein: an elastic jacking piece (290) is arranged in the lower die cushion block (230), the elastic jacking piece (290) is positioned below the shaft hole (241), and the upper end of the elastic jacking piece (290) extends into the shaft hole (241);

the inner wall of the shaft hole (241) is provided with an internal spline.

3. A seat height transmission member forming die according to claim 1, wherein: the edge of the retainer plate (210) exceeds the edge of the lower die insert (220), and a retainer plate guide column (250) and an elastic support (260) are arranged between the retainer plate (210) and the lower die base (100);

the upper end of the retainer plate guide column (250) is connected with the retainer plate (210), and the lower end of the retainer plate guide column movably penetrates into the lower die holder (100);

the elastic supporting piece (260) is fixed on the lower die holder (100);

the lower die holder (100) is also provided with a material supporting plate limiting column (270), the material supporting plate limiting column (270) is vertically arranged, and the upper end of the material supporting plate limiting column (270) faces the material supporting plate (210);

the upper moving die (b) comprises an upper die holder (400), the punching columns (300) are connected to the lower portion of the middle of the upper die holder (400), lower pressing columns (410) are respectively arranged on the upper die holder (400) and face each elastic supporting piece (260) and each retainer plate limiting column (270), and the lower ends of the lower pressing columns (410) face the retainer plates (210).

4. A seat height transmission member forming die according to claim 3, wherein: the material supporting plate guide posts (250), the elastic supporting pieces (260) and the material supporting plate limiting posts (270) are at least two and are uniformly distributed around the shaft holes (241).

5. A seat height transmission member forming die according to claim 3, wherein: and a protection plate (280) is vertically arranged on the lower die holder (100), the protection plate (280) is positioned outside the retainer plate (210), and the upper edge of the protection plate (280) is close to the upper die holder (400).

6. A seat height transmission member forming die according to claim 3, wherein: at least two stamping guide columns (700) are arranged between the lower die holder (100) and the upper die holder (400), and all the stamping guide columns (700) are uniformly distributed around the retainer plate (210);

still evenly be equipped with between lower die holder (100) and upper die holder (400) and push down spacing post (800) at least, all push down spacing post (800) around hold in the palm flitch (210) vertical setting, it includes spacing post hypomere (810) and spacing post upper segment (820) to push down spacing post (800), and wherein spacing post hypomere (810) sets firmly on lower die holder (100), spacing post upper segment (820) sets firmly on upper die holder (400).