CN102248652A

CN102248652A - Combined die of steel plastic compound strip

Info

Publication number: CN102248652A
Application number: CN2011101351872A
Authority: CN
Inventors: 郑能欢
Original assignee: SHENZHEN JIN HONG MACHINERY CO Ltd
Current assignee: HUAHAN PIPELINE SYSTEM TECHNOLOGY Co.,Ltd.
Priority date: 2011-05-24
Filing date: 2011-05-24
Publication date: 2011-11-23
Anticipated expiration: 2031-05-24
Also published as: CN102248652B

Abstract

The invention discloses a combined die of a steel plastic compound strip. The combined die comprises an upper cover plate, a core plate, a runner plate, a discharging plate, a secondary runner, a pressure flow adjusting device, a molten plastic filling opening connected with a molten plastic feeding pipe, a horizontal through steel strip guide hole, a strip plastic wall cavity and a lapping edge cavity arranged on the discharging plate, a primary runner for communicating the molten plastic filling opening with the strip plastic wall cavity and the lapping edge cavity, wherein the steel strip guide hole passes through the primary runner, secondary runners are arranged at two sides of the primary runner and are used for communicating the molten plastic filling opening and the lapping edge cavity; and the pressure flow adjusting device comprises a limiting element and a guide adjusting mechanism I, the limiting element is horizontally arranged at a connecting end of the primary runner and the molten plastic filling opening along the primary runner, and the guide adjusting mechanism I is in fit with the limiting element to drive the limiting element to move along a cross section direction of the limiting element and to be positioned. The combined die can guarantee the sufficient lapping edge material and complete structure formation; and the plastic flow and pressure in the runner can be adjusted according to different product demands, and the product quality is guaranteed.

Description

A kind of composite steel-plastic belt material assembling die

Technical field

The present invention relates to a kind of mould of making plastic-steel winding pipe belt material.

Background technology

The plastic-steel spiral winding pipe is the novel tube that substitutes traditional pipe of cement, steel pipe etc., finds broad application in Urban Buried Pipeline Network.Make the plastic-steel spiral winding pipe, at first need reinforcement steel band and plastic cement are combined into winding pipe belt material, pass through special-purpose spiral Wiring apparatus then, band is intertwined and connected is made into plastic-steel spiral winding pipe product.

As shown in Figure 1, by particular manufacturing craft melt plastic cement material and steel band being combined into cross-sectional structure comprises plastic cement wall 11, uprightly is arranged on the ribs 12 of plastic cement wall 11 1 sides and be arranged on the winding pipe belt material 10 of the

bridging arrangement

13,14 of plastic cement wall 11 both sides.

Existing composite steel-plastic belt material assembling die comprises assemblies such as baffle plate, mould bases, core rod and a plurality of templates, adopts sprue to be connected between its melt plastic cement inlet and band plastic cement wall die cavity and the overlap edge die cavity.There is following defective in existing composite steel-plastic belt material assembling die:

1, band plastic cement wall die cavity and overlap edge die cavity carry out feed by sprue, after band plastic cement wall die cavity has consumed the most of melt plastic cement in the sprue, cause the overlap edge die cavity under feeding, the band overlap edge usually occurs and lack material, the incomplete defective of structure;

2, the area of section that passes through for melt plastic cement of sprue immobilizes, thereby can't regulate plastic cement pressure, flow in the die cavity in the winding pipe belt material manufacture process.Because produce the extruded velocity difference that the different size winding pipe belt material is adopted, the plastic cement pressure, the flow that are produced in the mold cavity are also different, cause existing than big-difference in the quality of mould discharging mouth winding pipe belt material moulding, band defective products rate is higher.At present, under the existing mold structural condition, the way of control winding pipe belt material quality can only by virtue of experience be gone to regulate hauling speed and mated with extruded velocity, specification requirement height not only, complex manufacturing, and unstable product quality.

Summary of the invention

The technical problem to be solved in the present invention is, a kind of composite steel-plastic belt material assembling die is provided, overcome existing composite steel-plastic belt material assembling die flow passage structure unreasonable, can't regulate plastic cement pressure and flow in the runner, cause the higher defective of strip product defective products rate.

The technical solution adopted for the present invention to solve the technical problems is: construct a kind of composite steel-plastic belt material assembling die, comprise the melt plastic cement inlet that is connected with the melt plastic cement feed pipe, the steel band pilot hole that lateral direction penetrating is provided with, reclaiming plate, be arranged on band plastic cement wall die cavity and overlap edge die cavity on the reclaiming plate, the sprue that is communicated with this melt plastic cement inlet and this band plastic cement wall die cavity and overlap edge die cavity, described steel band pilot hole passes described sprue, it is characterized in that described mould comprises upper cover plate, central layer, runner plate, secondary channels and pressure flow adjusting device;

Described secondary channels is arranged on described sprue both sides and is communicated with described melt plastic cement inlet and described overlap edge die cavity;

Described pressure flow adjusting device comprises constriction and guiding governor motion I, on this constriction was horizontally installed on described sprue and a end that described melt plastic cement inlet is connected along described sprue, this guiding governor motion I cooperated with this constriction and can drive this constriction and moves and locate along the sprue cross-directional;

Described melt plastic cement inlet is arranged on the described upper cover plate;

Described central layer comprises the last central layer that is connected up and down, central layer down, and central layer and described upper cover plate are connected up and down and comprise the flow path groove that is positioned at below the described melt plastic cement inlet this on; This central layer comprise the central layer steel band pilot hole that is arranged in same horizontal parallel and connects the described steel band pilot hole of setting at interval, along this mould steel bring into the runner lower inclined plane of material direction under being tilted to with the nested inner surface that cooperates of described runner plate both side surface, described runner lower inclined plane upper end connects described flow path groove bottom surface, and described central layer steel band pilot hole all passes this runner lower inclined plane; Described runner plate comprises the structure I that is located by connecting, cooperate at interval with described runner lower inclined plane and with the common runner ramp that constitutes the sprue passage I of described sprue of the inner surface of described central layer, with the described steel band pilot hole of the corresponding one by one open lower side that also is communicated with of central layer steel band pilot hole of described central layer in runner plate steel band gathering sill and be arranged on the secondary channels passage I that this runner plate both side surface constitutes described secondary channels, corresponding each surface with steel band of this runner plate steel band gathering sill keeps the gap, and this runner plate uper side surface cooperates with described upper cover plate downside surface; The mating surface of described upper and lower central layer and this central layer steel band pilot hole transverse intersection;

Described reclaiming plate comprises reclaiming plate steel band gathering sill in the described steel band pilot hole, with the band plastic cement wall die cavity of the T-shaped cross connection of this reclaiming plate steel band gathering sill be arranged on the overlap edge die cavity of these band plastic cement wall die cavity both sides, the described steel band that this reclaiming plate steel band gathering sill allows to have the plastic cement composite bed passes through, and the connection corresponding one by one of this reclaiming plate steel band gathering sill with described central layer steel band gathering sill, described sprue is communicated with described melt plastic cement inlet and described band plastic cement wall die cavity and overlap edge die cavity; Described reclaiming plate comprises top discharge plate and the bottom discharge plate that cooperates up and down, the mating surface of this upper and lower reclaiming plate and described band plastic cement wall die cavity and overlap edge die cavity transverse intersection;

Described mould comprises the interface channel that is arranged on the described reclaiming plate adjoining members, this interface channel is communicated with the clearance space and the described sprue of described reclaiming plate steel band gathering sill, and the clearance space of this reclaiming plate steel band gathering sill is the clearance space between described reclaiming plate steel band gathering sill sidewall and the steel band sidewall;

Described upper cover plate, last central layer and following central layer upper, middle and lower are connected, and described top discharge plate and bottom discharge plate are connected up and down, laterally are connected before and after described reclaiming plate and described upper cover plate, last central layer and the following central layer.

In composite steel-plastic belt material assembling die of the present invention, the described runner plate structure I that is located by connecting comprises that the screw that is located by connecting, the correspondence that are arranged on described runner plate uper side surface are arranged on the connecting through hole on the described upper cover plate and pass this connecting through hole and cooperates with this screw that is located by connecting described runner plate is connected connecting bolt on the described upper cover plate;

Or described runner plate be located by connecting structure I comprise the screw that is located by connecting, the correspondence that are arranged on described runner plate both side surface be arranged on described go up the connecting through hole of the nested dual-side of central layer and pass this connecting through hole cooperate with this screw that is located by connecting with described runner plate be connected described on connecting bolt on the central layer;

Or the described runner plate structure I that is located by connecting comprises that being arranged on described detent, the correspondence that goes up the nested dual-side uper side surface of central layer is arranged on the location chimb that described runner plate dual-side cooperates with this detent location, and described upper cover plate is pressed on the location chimb of described runner plate in the detent of described last central layer.

In composite steel-plastic belt material assembling die of the present invention, comprise with the secondary channels of described secondary channels transverse intersection and regulate bolt.

In composite steel-plastic belt material assembling die of the present invention, described constriction is a bars; Described guiding governor motion I comprises the constriction groove, regulates bolt and at least two springs; Described constriction groove is positioned at described constriction top and is arranged on the described upper cover plate corresponding to this constriction, this constriction groove can hold described constriction and comprise along described sprue cross-directional and be arranged on groove spigot surface on its sidewall, and described constriction comprises the constriction spigot surface with this groove spigot surface corresponding matching; Described adjusting bolt and described upper cover plate threaded engagement, this adjusting bolt end is passed this upper cover plate and is pressed on the described constriction, described spring is arranged on described constriction and described going up between the central layer is in pressured state, and described adjusting bolt and described spring make this constriction keep balance;

Or described constriction is a bars; Described guiding governor motion I comprises the constriction groove, regulates bolt and at least two springs; Described constriction groove is positioned at described constriction below and is arranged on described going up on the central layer corresponding to this constriction, this constriction groove can hold described constriction and comprise along described sprue cross-directional and be arranged on groove spigot surface on its sidewall, and described constriction comprises the constriction spigot surface with this groove spigot surface corresponding matching; Described adjusting bolt and described central layer or the described central layer threaded engagement down of going up, this adjusting bolt end is passed the described central layer of going up and is pressed on the described constriction, described spring is arranged between described constriction and the described upper cover plate and is in pressured state, and described adjusting bolt and described spring make this constriction keep balance;

Or described constriction is a bars; Described guiding governor motion I comprises constriction groove, adjusted bolt and regulates bolt down; Described constriction groove is positioned at described constriction top and is arranged on the described upper cover plate corresponding to this constriction, this constriction groove can hold described constriction and comprise along described sprue cross-directional and be arranged on groove spigot surface on its sidewall, and described constriction comprises the constriction spigot surface with this groove spigot surface corresponding matching; Described adjusted bolt and described upper cover plate threaded engagement, this adjusted bolt end is passed this upper cover plate and is pressed on the described constriction, described bolt and described central layer or the described central layer threaded engagement down of going up of regulating down, this time regulated bolt end portion and passed that central layer is pressed on the described constriction this on, and described adjusted bolt and the described bolt of regulating down make this constriction maintenance balance;

Or described constriction is a bars; Described guiding governor motion I comprises constriction groove, adjusted bolt and regulates bolt down; Described constriction groove is positioned at described constriction below and is arranged on described going up on the central layer corresponding to this constriction, this constriction groove can hold described constriction and comprise along described sprue cross-directional and be arranged on groove spigot surface on its sidewall, and described constriction comprises the constriction spigot surface with this groove spigot surface corresponding matching; Described adjusted bolt and described upper cover plate threaded engagement, this adjusted bolt end is passed this upper cover plate and is pressed on the described constriction, described bolt and described central layer or the described central layer threaded engagement down of going up of regulating down, this time regulated bolt end portion and passed that central layer is pressed on the described constriction this on, and described adjusted bolt and the described bolt of regulating down make this constriction maintenance balance;

Or described constriction is a bars; Described guiding governor motion I comprises the constriction groove and regulates bolt; Described constriction groove is positioned at described constriction top and is arranged on the described upper cover plate corresponding to this constriction, this constriction groove can hold described constriction, described adjusting bolt comprises first screw thread that is arranged on its head and is arranged on second screw thread opposite with this first thread rotary orientation on this first screw thread screw rod afterwards that this first Major Diam is less than the path of this second screw thread; Described adjusting bolt passes described upper cover plate along described sprue cross-directional, its second screw thread and described upper cover plate threaded engagement, and its first screw thread and described constriction threaded engagement, described adjusting bolt keeps described constriction balance;

Or described constriction is a bars; Described guiding governor motion I comprises the constriction groove and regulates bolt; Described constriction groove is positioned at described constriction below and is arranged on described going up on the central layer corresponding to this constriction, this constriction groove can hold described constriction, described adjusting bolt comprises first screw thread that is arranged on its head and is arranged on second screw thread opposite with this first thread rotary orientation on this first screw thread screw rod afterwards that this first Major Diam is less than the path of this second screw thread; Described adjusting bolt passes the described central layer of going up along described sprue cross-directional, its second screw thread and described central layer or the described central layer threaded engagement down of going up, and its first screw thread and described constriction threaded engagement, described adjusting bolt keeps described constriction balance.

In composite steel-plastic belt material assembling die of the present invention, comprise the rebound that is arranged between described central layer and the reclaiming plate, this rebound comprises rebound, following rebound and transition central layer;

This time rebound comprises along this mould steel brings the runner lower inclined plane II that the material direction is tilted to into, with the rebound steel band gathering sill in the inner surface of the nested cooperation of described transition central layer both side surface and and the described steel band pilot hole that is communicated with corresponding one by one with described reclaiming plate steel band gathering sill, side opening on this rebound steel band gathering sill, along mould steel bring into the material direction be shrink horn-like, the last side opening of this rebound steel band gathering sill all is positioned at described runner lower inclined plane II, and this rebound steel band gathering sill port of export width is compound to carry out secondary greater than the thickness of the described steel band that has the plastic cement composite bed after described runner plate steel band gathering sill is compound;

This transition central layer comprises the structure I I that is located by connecting, cooperate at interval with described runner lower inclined plane II and with the common runner ramp II that constitutes the sprue passage II of described sprue of the inner surface of described rebound down, transition central layer steel band gathering sill in the described steel band pilot hole of and the open lower side that is communicated with corresponding one by one with described runner plate steel band gathering sill and described reclaiming plate steel band gathering sill be arranged on these transition central layer both sides and be connected the secondary channels passage II that described secondary channels and described overlap edge die cavity constitute described secondary channels, this transition central layer steel band gathering sill allows the described steel band that has the plastic cement composite bed after described runner plate steel band gathering sill is compound to pass through, and this transition central layer uper side surface cooperates with the described rebound downside surface of going up;

The described rebound of going up is connected up and down with following rebound;

Described sprue passage II lower end is communicated with described sprue passage I lower end, and described sprue passage II upper end is communicated with described band plastic cement wall die cavity and overlap edge die cavity;

Described reclaiming plate adjoining members is a rebound, and described interface channel is arranged on the following rebound of described rebound.

In composite steel-plastic belt material assembling die of the present invention, described transition central layer be located by connecting structure I I comprise the screw that is located by connecting, the correspondence that are arranged on described transition central layer uper side surface be arranged on described go up the connecting through hole on the rebound and pass this connecting through hole cooperate with this screw that is located by connecting with described transition central layer be connected described on connecting bolt on the rebound;

Or the described transition central layer structure I I that is located by connecting comprises that the screw that is located by connecting, the correspondence that are arranged on described transition central layer both side surface are arranged on the connecting through hole of the described down nested dual-side of rebound and pass this connecting through hole and cooperates with this screw that is located by connecting described transition central layer is connected the connecting bolt on the rebound described time;

Or the described transition central layer structure I I that is located by connecting comprises that the detent, the correspondence that are arranged on the described down nested dual-side uper side surface of rebound are arranged on the location chimb that described transition central layer dual-side cooperates with this detent location, described on rebound the location chimb of described transition central layer is pressed in the detent of described rebound down.

In composite steel-plastic belt material assembling die of the present invention, comprise the steel band supporting and regulating device, this steel band supporting and regulating device comprises that steel band supports the adjusting bolt, described steel band supports to be regulated bolt and is disposed on the described central layer down and is positioned at described steel band pilot hole before steel band feedstock direction and described sprue are crossing first along each described steel band pilot hole, every described steel band pilot hole is provided with two described steel bands at least and supports the adjusting bolt, bolt and described central layer threaded engagement are down regulated in each described steel band support, and each described steel band supports adjusting bolt front end and stretches into the support requirement that the interior degree of depth of each described steel band pilot hole satisfies the applicable minimum widith steel band of mould; The described steel band pilot hole height that is arranged on the described reclaiming plate intends using width of steel band to adapt with the production winding pipe belt material.

In composite steel-plastic belt material assembling die of the present invention, described reclaiming plate comprises the master tape thickness adjusting apparatus, this master tape thickness adjusting apparatus comprises thickness regulating part, guiding governor motion II and position limiting structure, the inner surface of this thickness regulating part constitutes a side complete side walls I of described band plastic cement wall die cavity, and this side sidewall I of described band plastic cement wall die cavity is positioned at the opposite side of described steel band pilot hole one side of this band plastic cement wall die cavity band; This guiding governor motion II cooperates with this thickness regulating part and can drive this thickness regulating part and move and locate along described band plastic cement wall thickness direction, and this position limiting structure limits this thickness regulating part and moves along band discharging direction.

In composite steel-plastic belt material assembling die of the present invention, described master tape thickness adjusting apparatus comprises the thickness regulating part mounting groove that is arranged on the described reclaiming plate, and described thickness regulating part is installed in this mounting groove; Described guiding governor motion II comprises mounting groove spigot surface and the thickness regulating part spigot surface of regulating positioner and cooperatively interacting, this mounting groove spigot surface is along being arranged on the described mounting groove perpendicular to described band plastic cement wall uper side surface direction, and this thickness regulating part spigot surface is arranged on the described thickness regulating part side corresponding to this mounting groove spigot surface; Described position limiting structure comprises mounting groove confined planes and the thickness regulating part confined planes that cooperatively interacts, this mounting groove confined planes cooperates the back described thickness regulating part of restriction to move along band discharging direction with this thickness regulating part confined planes, this mounting groove confined planes is arranged on the described mounting groove along band discharging direction, and this thickness regulating part confined planes is arranged on the described thickness regulating part side corresponding to this mounting groove confined planes.

In composite steel-plastic belt material assembling die of the present invention, described adjusting positioner comprises location adjusting bolt and at least two retainer springs, bolt and described reclaiming plate threaded engagement are regulated in described location, this adjusting bolt end, location is passed described reclaiming plate and is pressed on the described thickness regulating part, described retainer spring is arranged between described thickness regulating part and the described reclaiming plate and is in pressured state, and described location regulates bolt and described retainer spring makes this thickness regulating part keep balance;

Or described adjusting positioner comprises that bolt is regulated in the location and bolt is regulated in following location, should go up the location regulates bolt and passes described top discharge plate along described band plastic cement wall thickness direction and described top discharge plate threaded engagement and its end, this time location is regulated bolt and is passed described bottom discharge plate along described band plastic cement wall thickness direction and described bottom discharge plate threaded engagement and its end, and the location is regulated the bolt end and located adjusting bolt end portion down and is pressed on the described thickness regulating part respectively and keeps this thickness regulating part balance this on;

Or described adjusting positioner comprises location adjusting bolt, this location is regulated bolt and is comprised first screw thread that is arranged on its head and be arranged on second screw thread opposite with this first thread rotary orientation on this first screw thread screw rod afterwards that this first Major Diam is less than the path of this second screw thread; Described location is regulated bolt and is passed described reclaiming plate along described band plastic cement wall thickness direction, its second screw thread and described reclaiming plate threaded engagement, its first screw thread and described thickness regulating part threaded engagement, described location are regulated bolt and are kept described thickness regulating part balance.

Implement composite steel-plastic belt material assembling die of the present invention, compared with the prior art, its beneficial effect is:

1. increase to the special-purpose secondary channels and the pressure flow adjusting device of band overlap edge feed, guarantee that band overlap edge feed abundance, structure formation are complete; Can adjust the flow and the pressure of melt plastic cement in the runner according to the needs of different model product simultaneously, guarantee product quality;

2. band overlap edge feed does not take the melt plastic cement into the sprue of band plastic cement wall die cavity, when guaranteeing band overlap edge architecture quality, guarantees that band plastic cement wall feed is abundant, guarantees band plastic cement wall construction quality;

3. when the steel band supporting and regulating device is set, by regulating the adjusting bolt in the steel band supporting and regulating device, in the width allowed band in mould steel tape guide hole, satisfy the support of different in width steel band, make mould can satisfy the purpose that adopts the different in width steel band to produce winding pipe belt material, and do not need to make a plurality of moulds, significantly reduced number of molds by changing reclaiming plate, reduce die cost, thereby reduced the manufacturing cost of winding pipe belt material; Adopt upper and lower reclaiming plate to cooperate the reclaiming plate structure that constitutes, when changing reclaiming plate, do not need to cut off steel band, can be because of not changing the waste that reclaiming plate causes steel band and plastic material;

4. when the master tape thickness adjusting apparatus is set, change the master tape thickness of intending producing band by regulating master tape thickness spare, required number of molds when having significantly reduced the steel-plastic structure wall pipe racks section product of producing different master tape thickness, reduce the input of steel-plastic structure wall pipe racks material production on mould, reduced the production cost of steel-plastic structure wall pipe racks material; Need not more mold exchange when producing the steel-plastic structure wall pipe racks material of different-thickness, significantly reduced equipment and adjusted the time, improve the productivity ratio of steel-plastic structure wall pipe racks material.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the viewgraph of cross-section of a kind of embodiment of winding pipe belt material.

Fig. 2 is along the cutaway view of E-E among Fig. 3 among the composite steel-plastic belt material assembling die embodiment one of the present invention.

Fig. 3 is along the cutaway view of A-A among Fig. 2 among the composite steel-plastic belt material assembling die embodiment one of the present invention.

Fig. 4 is along the cutaway view of B-B among Fig. 2 among the composite steel-plastic belt material assembling die embodiment one of the present invention.

Fig. 5 is along the cutaway view of C-C among Fig. 2 among the composite steel-plastic belt material assembling die embodiment one of the present invention.

Fig. 6 is along the embodiment one of the cutaway view of D-D among Fig. 3 among the composite steel-plastic belt material assembling die embodiment one of the present invention.

Fig. 7 is along the embodiment two of the cutaway view of D-D among Fig. 3 among the composite steel-plastic belt material assembling die embodiment one of the present invention.

Fig. 8 is along the embodiment three of the cutaway view of D-D among Fig. 3 among the composite steel-plastic belt material assembling die embodiment one of the present invention.

Fig. 9 is the exploded perspective view one of composite steel-plastic belt material assembling die embodiment one of the present invention.

Figure 10 is the exploded perspective view two of composite steel-plastic belt material assembling die embodiment one of the present invention.

Figure 11 is the embodiment cutaway view that composite steel-plastic belt material assembling die of the present invention is provided with the steel band supporting and regulating device.

Figure 12 is the cutaway view of composite steel-plastic belt material assembling die embodiment two of the present invention.

The specific embodiment

Embodiment one

Extremely shown in Figure 10 as Fig. 2, composite steel-plastic belt material assembling die of the present invention comprises upper cover plate 21, central layer, runner plate 24, rebound, reclaiming plate and pressure flow adjusting device, and central layer, rebound and reclaiming plate are linked in sequence successively along the feedstock direction of mould steel band 80.

Upper cover plate 21 comprises the melt plastic cement inlet 211 that is connected with melt plastic cement feed pipe 50.

Central layer comprises the last central layer 22 that is connected up and down, following central layer 23, and last central layer 22 is connected up and down with upper cover plate 21, and last central layer 22 comprises the flow path groove 221 that is positioned at melt plastic cement inlet 211 belows.

Central layer comprise the central layer steel band pilot hole 100 that is positioned at same horizontal parallel and connects setting at interval, along this mould steel bring into the runner lower inclined plane 200 of material direction under being tilted to with the nested inner surface that cooperates of runner plate 24 both side surface, these runner lower inclined plane 200 upper ends connect the bottom surface of flow path groove 221, central layer steel band pilot hole 100 all passes this runner lower inclined plane 200, all can carry out compound with melt plastic cement with the side surface that guarantees steel band.

Runner plate 24 comprises the structure that is located by connecting, runner ramp 240, runner plate steel band gathering sill 241 and secondary channels passage 242 (secondary channels is for being communicated with the melt plastic cement runner of melt plastic cement inlet 211 and overlap edge die cavity (stating as follows)).Runner ramp 240 cooperates at interval with runner lower inclined plane 200, and constitute sprue passage 33 (sprue is for being communicated with the melt plastic cement runner of melt plastic cement inlet 211 and band plastic cement wall die cavity and overlap edge die cavity (stating as follows)) jointly with the inner surface of runner lower inclined plane 200 and central layer, runner plate steel band gathering sill 241 open lower side are also corresponding one by one with the central layer steel band pilot hole 100 of central layer and be communicated with, secondary channels passage 242 is arranged on the both side surface of runner plate 24, and an end of secondary channels passage 242 is communicated with flow path groove 221, the other end is communicated with the overlap edge die cavity (stating as follows) that is arranged on reclaiming plate by the secondary channels passage 283 that is arranged on the transition central layer 28 (stating as follows).Runner plate steel band gathering sill 241 corresponding each surface with steel band keep the gap to realize the compound of steel band side surface and melt plastic cement, and the uper side surface of runner plate 24 cooperates with the downside surface of upper cover plate 21.

As shown in Figure 5,, satisfy the suitable materials requirement of overlap edge die cavity, be provided with the secondary channels of secondary channels transverse intersection and regulate bolt 243 for regulating the flow of secondary channels melt plastic cement.Secondary channels is regulated bolt 243 can be arranged on central layer side or upper cover plate end face, also can be arranged on rebound (stating as follows) side or end face.

The mating surface of upper and lower

central layer

22,23 and central layer steel band pilot hole 100 transverse intersection.In the present embodiment, the transverse intersection position of the mating surface of upper and lower

central layer

22,23 and central layer steel band pilot hole 100 is at the middle part of central layer steel band pilot hole 100, in other embodiments, the object of the invention can all can be realized in top, bottom even top or the bottom of central layer steel band pilot hole 100 in the transverse intersection position of the mating surface of upper and lower

central layer

22,23 and central layer steel band pilot hole 100.

The structure that is located by connecting of above-mentioned runner plate 24 can adopt and include but not limited to following structure:

1, at the uper side surface setting of runner plate 24 screw that is located by connecting, correspondence is provided with connecting through hole on upper cover plate 21, adopts connecting bolt to pass this connecting through hole and cooperates with this screw that is located by connecting runner plate 24 is connected on the upper cover plate 21.

2, at the both side surface setting of runner plate 24 screw that is located by connecting, in the nested dual-side correspondence of last central layer 22 connecting through hole is set, adopt connecting bolt to pass this connecting through hole and cooperate with this screw that is located by connecting runner plate 24 is connected on the central layer 22.

3, the nested dual-side uper side surface at last central layer 22 is provided with detent, and at the corresponding location chimb that cooperates with this detent location that is provided with of dual-side of runner plate 24, upper cover plate 21 is pressed on the location chimb of runner plate 24 in the detent of central layer 22.

Rebound comprises rebound 25, following rebound 31 and transition central layer 28.

Following rebound 31 comprises along this mould steel brings the runner lower inclined plane 311 that the material direction is tilted to into, with the inner surface 312 of the nested cooperation of transition central layer both side surface and rebound steel band gathering sills 313 corresponding one by one with reclaiming plate steel band gathering sill 300 and that be communicated with, side opening on this rebound steel band gathering sill 313, and along mould steel bring into the material direction be shrink horn-like, the last side opening of this rebound steel band gathering sill 313 all is positioned at runner lower inclined plane 311, guarantee the thickness of rebound steel band gathering sill 313 port of export width greater than the steel band that has the plastic cement composite bed after runner plate steel band gathering sill 241 is compound, steel band can to carry out secondary compound with melt plastic cement so that change.

With the rebound of reclaiming plate adjacency in following rebound 31 on be provided with bring the material direction into along mould steel and be and shrink trumpet-shaped rebound steel band gathering sill 313, for providing a communication passage 32a between the clearance space that is communicated with reclaiming plate steel band gathering sill and the sprue, make melt plastic cement in the sprue can successfully arrive the clearance space of reclaiming plate steel band gathering sill.The clearance space of reclaiming plate steel band gathering sill is meant the clearance space between reclaiming plate steel band gathering sill sidewall and the steel band sidewall.

Transition central layer 28 comprises the structure that is located by connecting, runner ramp 281, transition central layer steel band gathering sill 282 and secondary channels passage 283.Runner ramp 281 cooperates at interval with runner lower inclined plane 311, and constitute sprue passage 32 jointly with the inner surface of runner lower inclined plane 311 and following rebound, transition central layer steel band gathering sill 282 open lower side are also corresponding one by one with runner plate steel band gathering sill 241 and reclaiming plate steel band gathering sill 300 and be communicated with, secondary channels passage 283 is arranged on the both side surface of transition central layer 28, and an end of secondary channels passage 283 is communicated with secondary channels passage 242, the other end is communicated with the overlap edge die cavity that is arranged on reclaiming plate.This transition central layer steel band gathering sill 282 allows the steel band that has the plastic cement composite bed after runner plate steel band gathering sill 241 is compound to pass through, and the uper side surface of transition central layer 28 cooperates with the downside surface of last rebound 25.

Last rebound 25 is connected up and down with following rebound 31.As shown in Figure 3, in the present embodiment, last rebound 25 and the mating surface of following rebound 31 and the side transverse intersection of transition central layer 28, last rebound 25 also comprises and the nested inner surface that cooperates of transition central layer 28 both side surface.In other embodiments, last rebound 25 can be concordant with the uper side surface of transition central layer 28 with the mating surface of following rebound 31, also can be higher than the uper side surface of transition central layer 28.

Sprue passage 32 lower ends are communicated with sprue passage 33 lower ends, and sprue passage 32 upper ends are communicated with band plastic cement wall die cavity and overlap edge die cavity (stating as follows).

The structure that is located by connecting of above-mentioned transition central layer 28 can adopt and include but not limited to following structure:

1, at the uper side surface setting of transition central layer 28 screw that is located by connecting, correspondingly on last rebound 25, connecting through hole is set, the employing connecting bolt passes this connecting through hole and cooperates with this screw that is located by connecting transition central layer 28 is connected on the rebound 25.

2, at the both side surface setting of transition central layer 28 screw that is located by connecting, correspondingly connecting through hole is set at rebound 31 nested dual-sides down, adopt connecting bolt to pass this connecting through hole and cooperate with this screw that is located by connecting transition central layer 28 is connected down on the rebound 31.

3, the nested dual-side uper side surface at following rebound 31 is provided with detent, the corresponding location chimb that cooperates with this detent location in the dual-side setting of transition central layer 28, last rebound 25 is pressed on down the location chimb of transition central layer 28 in the detent of rebound 31.

Reclaiming plate comprises reclaiming plate steel band gathering sill 300, with the band plastic cement wall die cavity 29 of reclaiming plate steel band gathering sill 300 T-shaped cross connections with to be arranged on the overlap edge die cavity of these band plastic cement wall die cavity both sides (corresponding with bridging arrangement among Fig. 1 13,14, not shown), the steel band that this reclaiming plate steel band gathering sill 300 allows to have the plastic cement composite bed passes through, this reclaiming plate steel band pilot hole 300 and the 100 corresponding one by one and connections of central layer steel band gathering sill, band plastic cement wall die cavity 29 and overlap edge die cavity are communicated with sprue passage 32.

Reclaiming plate comprises top discharge plate 26 and the bottom discharge plate 30 that cooperates up and down, the mating surface of this upper and

lower reclaiming plate

26,30 and band plastic cement wall die cavity 29 and overlap edge die cavity transverse intersection can disassemble top discharge plate 26 and bottom discharge plate 30 under the condition of not cutting off steel band during with assurance trouble hunting mould.

Long-pending in order to increase the flow channel cross-section that sprue passage 32 enters before band plastic cement wall die cavity 29 and the overlap edge die cavity, in the direction of bottom discharge plate 26 upper edge sprue passages 32 inclined-plane 301 is set.

The annexation of above-mentioned each plate is: upper cover plate 21, last central layer 22 and following central layer 23 upper, middle and lower are connected; Last rebound 25 and following rebound 31 are connected up and down; Top discharge plate 26 and bottom discharge plate 30 are connected up and down, upper cover plate 21, go up and laterally to be connected before and after central layer 22 and following central layer 23 and rebound, the reclaiming plate (as shown in Figure 3, can by connecting bolt 27 connections).In order to guarantee the quality of fit between central layer, rebound, the reclaiming plate, can on central layer, rebound, reclaiming plate, be provided with respectively for locating hole, realize the location by the alignment pin that cooperates with locating hole 255.

The pressure flow adjusting device comprises constriction 223 and guiding governor motion.Constriction 223 is along an end 224 places that sprue is connected with melt plastic cement inlet 211 that are horizontally installed on of sprue, this guiding governor motion cooperates with constriction 223 and can drive this constriction 223 and moves and locate along the sprue cross-directional, realizes the adjusting to the pressure and the flow of melt plastic cement.

Constriction 223 adopts strip components, as structural members such as bar shaped quadrangular, the oblate posts of bar shaped, and according to the needs of guiding governor motion, on constriction 223 guide frame is set.

The guiding governor motion can adopt and include but not limited to following structure:

1, as shown in Figure 6, the guiding governor motion comprises constriction groove 225, regulates bolt 222 and at least two springs 226.The top that constriction groove 225 is positioned at constriction 223 is arranged on the upper cover plate 21 corresponding to constriction 223, constriction groove 225 can hold constriction 223 and along the sprue cross-directional groove spigot surface 225a is set on its sidewall, and constriction 223 is provided with the constriction spigot surface 223a of corresponding matching corresponding to this groove spigot surface 225a.Regulate bolt 222 and upper cover plate 21 threaded engagement, the end of adjusting bolt 222 is passed this upper cover plate 21 and is pressed on the constriction 223, spring 226 is arranged between constriction 223 and the last central layer 22 and is in pressured state, spring 226 and regulate the position is set should makes this constriction 223 keep balances of bolt 222.In order to improve the job stability of spring 226, can on last central layer 22, spring groove 227 be set corresponding to the installation site of spring 226.

2, the guiding governor motion comprises the constriction groove, regulates bolt 222 and at least two springs 226.The below that the constriction groove is positioned at constriction 223 is arranged on the central layer 22 corresponding to constriction 223, the constriction groove can hold constriction 223 and along the sprue cross-directional groove spigot surface is set on its sidewall, and constriction 223 is provided with the constriction spigot surface of corresponding matching corresponding to this groove spigot surface.Regulate bolt 222 and last central layer 22 or following central layer 23 threaded engagement, the end of regulating bolt 222 passes that central layer 22 is pressed on the constriction 223 on this, spring 226 is arranged between constriction 223 and the upper cover plate 21 and is in pressured state, spring 226 and regulate the position is set should makes this constriction 223 keep balances of bolt 222.

3, as shown in Figure 7, the guiding governor motion comprises constriction groove, adjusted bolt 222 and regulates bolt 228 down.The constriction groove is positioned at constriction 223 tops and is arranged on the upper cover plate 21 corresponding to this constriction 223, the constriction groove can hold constriction 223 and along the sprue cross-directional groove spigot surface is set on its sidewall, and constriction 223 is provided with the constriction spigot surface of corresponding matching corresponding to this groove spigot surface.Adjusted bolt 222 and upper cover plate 21 threaded engagement, this adjusted bolt end is passed upper cover plate 21 and is pressed on the constriction 223.Under regulate bolt 228 and last central layer 22 or central layer 23 threaded engagement down, this time regulated bolt end portion and passed central layer 22 and be pressed on the constriction 223, adjusted bolt 222 and down adjusting bolt 228 make this constriction 223 maintenance balances.

4, the guiding governor motion comprises constriction groove, adjusted bolt 222 and regulates bolt 228 down.The constriction groove is positioned at constriction 223 belows and is arranged on the central layer 22 corresponding to this constriction 223, the constriction groove can hold constriction 223 and along the sprue cross-directional groove spigot surface is set on its sidewall, and constriction 223 is provided with the constriction spigot surface of corresponding matching corresponding to this groove spigot surface.Adjusted bolt 222 and upper cover plate 21 threaded engagement, this adjusted bolt end is passed upper cover plate 21 and is pressed on the constriction 223.Under regulate bolt 228 and last central layer 22 or central layer 23 threaded engagement down, this time regulated bolt end portion and passed central layer 22 and be pressed on the constriction 223, adjusted bolt 222 and down adjusting bolt 228 make this constriction 223 maintenance balances.

5, as shown in Figure 8, the guiding governor motion comprises the constriction groove and regulates bolt 229.The constriction groove is positioned at constriction 223 tops and is arranged on the upper cover plate 21 corresponding to this constriction 223, the constriction groove can hold constriction 223, regulate bolt 229 and comprise the first screw thread 229a that is arranged on its head and be arranged on the second screw thread 229b opposite on this first screw thread screw rod afterwards that the big footpath of this first screw thread is less than the path of this second screw thread with this first thread rotary orientation.Regulate bolt 229 and pass upper cover plate 21 along the sprue cross-directional, its second screw thread and upper cover plate 21 threaded engagement, its first screw thread and constriction 223 threaded engagement are regulated bolt 229 and are kept constriction 223 balances.

6, the guiding governor motion comprises the constriction groove and regulates bolt; The constriction groove is positioned at the constriction below and is arranged on the central layer corresponding to this constriction, and the constriction groove can hold constriction.Regulate bolt and comprise first screw thread that is arranged on its head and be arranged on second screw thread opposite on this first screw thread screw rod afterwards that the big footpath of this first screw thread is less than the path of this second screw thread with this first thread rotary orientation; Regulate bolt and pass the described central layer of going up along the sprue cross-directional, its second screw thread and described central layer or the described central layer threaded engagement down of going up, its first screw thread and described constriction threaded engagement, described adjusting bolt keeps described constriction balance.

In order to realize that band master tape thickness is regulated, the master tape thickness adjusting apparatus is set on reclaiming plate: the master tape thickness adjusting apparatus comprises thickness regulating part 35, guiding governor motion and position limiting structure.

In the present embodiment, guiding governor motion and position limiting structure adopt following structure:

Thickness regulating part mounting groove 261 is set on top discharge plate 26, thickness regulating part 35 is installed in this mounting groove 261, the surface of thickness regulating part 35 constitutes the upside complete side walls of band plastic cement wall die cavity, and this side sidewall of band plastic cement wall die cavity is positioned at band plastic cement wall die cavity and takes the opposite side of flitch steel band gathering sill 300 1 sides out of.

The guiding governor motion comprises mounting groove spigot surface 262 (two mounting groove spigot surfaces 262 are parallel to each other) and the thickness regulating part spigot surface 351 of regulating positioner and cooperatively interacting, mounting groove spigot surface 262 is along being arranged on the mounting groove 261 perpendicular to band plastic cement wall uper side surface direction, thickness regulating part spigot surface 351 is arranged on the side of thickness regulating part 35 corresponding to mounting groove spigot surface 262, mounting groove spigot surface 262 and thickness regulating part spigot surface 351 cooperatively interact back assurance thickness regulating part 35 along the mobile adjusting of band plastic cement wall thickness direction (promptly perpendicular to band plastic cement wall uper side surface direction), to change the plastic cement wall thickness of profile band.

Position limiting structure comprises mounting groove confined planes (not shown) and the thickness regulating part confined planes 352 that cooperatively interacts, the mounting groove confined planes is arranged on the mounting groove 261 along band discharging direction, thickness regulating part confined planes 352 is arranged on the side of thickness regulating part 35 corresponding to the mounting groove confined planes, and the mounting groove confined planes cooperates back limited thickness regulating part 35 to move along band discharging direction with thickness regulating part confined planes 352.

In other embodiments, mounting groove spigot surface 262 edges of thickness regulating part mounting groove 261 can be arranged on the mounting groove 261 perpendicular to band plastic cement wall uper side surface direction, simultaneously mounting groove spigot surface 262 is arranged to cone tank in band discharging direction, the big end of cone tank to little extreme direction is a band discharging direction, thickness regulating part spigot surface 351 is also corresponding is arranged to the taper that matches with taper mounting groove 261, at this moment, this taper mounting groove 261 plays simultaneously with taper thickness regulating part spigot surface 351 thickness regulating part 35 is led along band plastic cement wall thickness direction, along the spacing effect of band discharging direction.

Above-mentioned adjusting positioner can adopt and include but not limited to following structure:

1, as shown in Figure 3, regulate positioner and comprise adjusting bolt 34 and at least two spring (not shown)s, regulate bolt and reclaiming plate threaded engagement, adjusting bolt end is passed reclaiming plate and is pressed on the thickness regulating part, spring is arranged between thickness regulating part and the reclaiming plate and is in pressured state, regulates bolt and spring and makes the thickness regulating part keep balance.

2, regulating positioner comprises the adjusted bolt and regulates bolt down, the adjusted bolt passes the top discharge plate along band plastic cement wall thickness direction and top discharge plate threaded engagement and its end, under regulate bolt and pass the bottom discharge plate, adjusted bolt end and regulate bolt end portion down and be pressed on the thickness regulating part respectively and keep this thickness regulating part balance along band plastic cement wall thickness direction and bottom discharge plate threaded engagement and its end.

3, regulate positioner and comprise the adjusting bolt, regulate bolt and comprise first screw thread that is arranged on its head and be arranged on second screw thread opposite on this first screw thread screw rod afterwards that first Major Diam is less than the path of this second screw thread with this first thread rotary orientation; Regulate bolt and pass reclaiming plate along band plastic cement wall thickness direction, its second screw thread and reclaiming plate threaded engagement, its first screw thread and thickness regulating part threaded engagement are regulated bolt and are kept thickness regulating part balance.

In other embodiments, the master tape thickness adjusting apparatus is not set, does not influence the realization of the basic goal of the invention of the present invention.

In same mould, to adapt to the requirement that the different in width steel band is made band in order satisfying, the steel band supporting and regulating device to be set.

As shown in figure 11, the steel band supporting and regulating device comprises regulates bolt 40, regulate bolt 40 and be disposed on central layer steel band pilot hole 100 belows (regulating bolt 40 is positioned on the following central layer 23 of central layer steel band pilot hole 100 before steel band feedstock direction and sprue are crossing first) along every central layer steel band pilot hole 100, every central layer steel band pilot hole 100 is provided with two at least and regulates bolt 40, regulate bolt 40 and following central layer 23 threaded engagement, each front end of regulating bolt 40 extend in its corresponding central layer steel band pilot hole 100, with the steel band of support width less than central layer steel band pilot hole 100 height.Regulate the support requirement that the degree of depth will satisfy mould minimum widith steel band applicatory of stretching into of bolt 40, promptly regulate bolt 40 and can support mould minimum widith steel band applicatory.

On following central layer 23, the diameter corresponding with regulating bolt 40 front ends can be set greater than the counterbore 41 of regulating bolt 40 Major Diams.

In other embodiments, the steel band supporting and regulating device is not set, does not influence the realization of the basic goal of the invention of the present invention.

Embodiment two

As shown in figure 12, structure and the conversion thereof of present embodiment and embodiment one are basic identical, and difference is: the cancellation rebound, reclaiming plate directly is connected the discharge end of central layer, at this moment, reclaiming plate steel band gathering sill 300 is arranged on the top discharge plate 26, and steel band and melt plastic cement are only carried out once-combined.Be arranged on that secondary channels passage 242 1 ends on the both side surface of runner plate 24 are communicated with flow path groove 221, the other end is communicated with the overlap edge die cavity that is arranged on reclaiming plate.The clearance space and the communication passage between the sprue that are communicated with reclaiming plate steel band gathering sill are arranged on the runner plate 24, see the 24a among Figure 12.

Correspondingly, in the master tape thickness adjusting apparatus, thickness regulating part mounting groove is set on the bottom discharge plate, the thickness regulating part is installed in this mounting groove, and other structures are as described in the embodiment one.

Claims

1. composite steel-plastic belt material assembling die, comprise the melt plastic cement inlet that is connected with the melt plastic cement feed pipe, lateral direction penetrating setting steel band pilot hole, reclaiming plate, be arranged on band plastic cement wall die cavity and overlap edge die cavity on the reclaiming plate, be communicated with the sprue of this melt plastic cement inlet and this band plastic cement wall die cavity and overlap edge die cavity, described steel band pilot hole passes described sprue, it is characterized in that described mould comprises upper cover plate, central layer, runner plate, secondary channels and pressure flow adjusting device;

2. composite steel-plastic belt material assembling die as claimed in claim 1, it is characterized in that the described runner plate structure I that is located by connecting comprises that the screw that is located by connecting, the correspondence that are arranged on described runner plate uper side surface are arranged on the connecting through hole on the described upper cover plate and pass this connecting through hole and cooperates with this screw that is located by connecting described runner plate is connected connecting bolt on the described upper cover plate;

3. composite steel-plastic belt material assembling die as claimed in claim 1 is characterized in that, comprises with the secondary channels of described secondary channels transverse intersection regulating bolt.

4. composite steel-plastic belt material assembling die as claimed in claim 1 is characterized in that described constriction is a bars; Described guiding governor motion I comprises the constriction groove, regulates bolt and at least two springs; Described constriction groove is positioned at described constriction top and is arranged on the described upper cover plate corresponding to this constriction, this constriction groove can hold described constriction and comprise along described sprue cross-directional and be arranged on groove spigot surface on its sidewall, and described constriction comprises the constriction spigot surface with this groove spigot surface corresponding matching; Described adjusting bolt and described upper cover plate threaded engagement, this adjusting bolt end is passed this upper cover plate and is pressed on the described constriction, described spring is arranged on described constriction and described going up between the central layer is in pressured state, and described adjusting bolt and described spring make this constriction keep balance;

5. composite steel-plastic belt material assembling die as claimed in claim 1 is characterized in that, comprises the rebound that is arranged between described central layer and the reclaiming plate, and this rebound comprises rebound, following rebound and transition central layer;

6. composite steel-plastic belt material assembling die as claimed in claim 5, it is characterized in that, described transition central layer be located by connecting structure I I comprise the screw that is located by connecting, the correspondence that are arranged on described transition central layer uper side surface be arranged on described go up the connecting through hole on the rebound and pass this connecting through hole cooperate with this screw that is located by connecting with described transition central layer be connected described on connecting bolt on the rebound;

7. as the described composite steel-plastic belt material of one of claim 1 to 6 assembling die, it is characterized in that, comprise the steel band supporting and regulating device, this steel band supporting and regulating device comprises that steel band supports the adjusting bolt, described steel band supports to be regulated bolt and is disposed on the described central layer down and is positioned at described steel band pilot hole before steel band feedstock direction and described sprue are crossing first along each described steel band pilot hole, every described steel band pilot hole is provided with two described steel bands at least and supports the adjusting bolt, bolt and described central layer threaded engagement are down regulated in each described steel band support, and each described steel band supports adjusting bolt front end and stretches into the support requirement that the interior degree of depth of each described steel band pilot hole satisfies the applicable minimum widith steel band of mould; The described steel band pilot hole height that is arranged on the described reclaiming plate intends using width of steel band to adapt with the production winding pipe belt material.

8. as the described composite steel-plastic belt material of one of claim 1 to 6 assembling die, it is characterized in that, described reclaiming plate comprises the master tape thickness adjusting apparatus, this master tape thickness adjusting apparatus comprises thickness regulating part, guiding governor motion II and position limiting structure, the inner surface of this thickness regulating part constitutes a side complete side walls I of described band plastic cement wall die cavity, and this side sidewall I of described band plastic cement wall die cavity is positioned at the opposite side of described steel band pilot hole one side of this band plastic cement wall die cavity band; This guiding governor motion II cooperates with this thickness regulating part and can drive this thickness regulating part and move and locate along described band plastic cement wall thickness direction, and this position limiting structure limits this thickness regulating part and moves along band discharging direction.

9. composite steel-plastic belt material assembling die as claimed in claim 8 is characterized in that, described master tape thickness adjusting apparatus comprises the thickness regulating part mounting groove that is arranged on the described reclaiming plate, and described thickness regulating part is installed in this mounting groove; Described guiding governor motion II comprises mounting groove spigot surface and the thickness regulating part spigot surface of regulating positioner and cooperatively interacting, this mounting groove spigot surface is along being arranged on the described mounting groove perpendicular to described band plastic cement wall uper side surface direction, and this thickness regulating part spigot surface is arranged on the described thickness regulating part side corresponding to this mounting groove spigot surface; Described position limiting structure comprises mounting groove confined planes and the thickness regulating part confined planes that cooperatively interacts, this mounting groove confined planes cooperates the back described thickness regulating part of restriction to move along band discharging direction with this thickness regulating part confined planes, this mounting groove confined planes is arranged on the described mounting groove along band discharging direction, and this thickness regulating part confined planes is arranged on the described thickness regulating part side corresponding to this mounting groove confined planes.

10. composite steel-plastic belt material assembling die as claimed in claim 9, it is characterized in that, described adjusting positioner comprises location adjusting bolt and at least two retainer springs, bolt and described reclaiming plate threaded engagement are regulated in described location, this adjusting bolt end, location is passed described reclaiming plate and is pressed on the described thickness regulating part, described retainer spring is arranged between described thickness regulating part and the described reclaiming plate and is in pressured state, and described location regulates bolt and described retainer spring makes this thickness regulating part keep balance;