CN102171017B

CN102171017B - Die for OA blade

Info

Publication number: CN102171017B
Application number: CN200980139475.6A
Authority: CN
Inventors: 后藤泰平
Original assignee: Bridgestone Corp
Current assignee: Arkema Co ltd
Priority date: 2008-08-04
Filing date: 2009-08-03
Publication date: 2013-10-30
Anticipated expiration: 2029-08-03
Also published as: WO2010016464A1; JP2010036429A; CN102171017A; JP5394670B2

Abstract

Provided is a die (5) for manufacturing an OA blade (1), wherein the OA blade is provided with a long hard plate (2) and an elastic member (3) arranged in the longitudinal direction on the long hard plate. The die has a cavity (CA) formed in a shape that corresponds to the elastic member, and a gate (14) through which a material (MA) to be the elastic member is injected to the cavity (CA) from the external, wherein the gate diameter is set at 0.5 to 0.8 mm. Since the gate diameter is set smaller than general gate diameters, optimum material filling speed is ensured in the cavity, and generation of short-circuit or the like is suppressed.

Description

OA scraper plate mould

Technical field

The present invention relates to a kind of mould for the manufacture of the OA scraper plate, this OA scraper plate is bonding such as elastic components such as elastomeric materials at a side surface of the hard plate that the sheet metal by thin and microscler shape forms.More specifically, the present invention relates to a kind of OA scraper plate mould that occurs to fill bad (short shot) or produce overlap (flash) that can be suppressed in the elastic component.

Background technology

In electro photography types such as duplicating machine, facsimile recorder and printer or electrostatic recording type image processing system (below be referred to as " OA device "), use various OA scraper plates, described OA scraper plate comprises: be used for the developing blade that developer roll that restricted passage makes periphery be coated with developer rotates the amount of the developer of supplying with; The cleaning balde that is used for cleaning photosensitive drums or band; Transfer printing scraper plate etc.

Usually, the OA scraper plate is formed so that rubber component is bonded on the plate that is formed by metal etc.

For example, make as follows this OA scraper plate: in advance with bonding agent or priming paint (primer) metallic sheet; Sheet metal is set in precalculated position in the mould; Utilize transfer formation (transfer molding) method or injection moulding material to be injected in the die cavity of mould; And formation OA scraper plate under the state of bonded metal plate.Liquid silicones (silicone) is used as forming the material of scraper plate.

Mould is provided with for the cast gate (gate) that material is injected into die cavity, and described cast gate has the diameter of about 1.0mm to 1.5mm usually.Be set in above-mentioned scope by the diameter with cast gate, can make material be diffused into whole die cavity.

Summary of the invention

The problem that invention will solve

Yet, in the mould of the cast gate in diameter drops on above-mentioned scope, can not obtain enough injection speeds, exist thus following may: be injected into hardening before arriving whole die cavity such as materials such as liquid silicones in the die cavity, the edge that causes for example occuring as illustrated in fig. 6 scraper plate is not injected into the bad SH of filling of Material Filling.Especially, such as low viscosity material (viscosity: 1000Pas (0.9s such as low-viscosity (mobile) liquid silicone ^-1) following) be used as treating in the situation of injecting material bad SH occuring easily to fill.In addition, easilier when mould has a plurality of die cavity fill bad SH.

Consider the above-mentioned fact, the objective of the invention is to propose a kind of OA scraper plate mould, it is suitable for having with the form manufacturing of the best the OA scraper plate of elastic component, and can not fill bad.

For the scheme of dealing with problems

Can realize purpose of the present invention with mould by following OA scraper plate: described mould can be used in makes the OA scraper plate with long hard plate and elastic component, described elastic component is arranged on the described long hard plate along the length direction of described microscler cardboard, described mould comprises: die cavity, and it forms the shape corresponding with described elastic component; And cast gate, it is injected into described die cavity for the material that just forms described elastic component from the outside, and wherein, the diameter of described cast gate is set at the scope of 0.5mm to 0.8mm.

In addition, mould can dispose a plurality of die cavitys.In addition, the quantity that is arranged at the cast gate of die cavity can be one.In addition, die cavity can be provided with teat, and this teat forms the part of die cavity and gives prominence to than other parts, and cast gate can be disposed in the teat.

In addition, mould can also comprise for recovery and be injected into die cavity and the overflow part of the material that overflows that this overflow part is arranged at opposite with a cast gate side in the longitudinal direction side.

In addition, thermosets can be used as described material; Overflow part and be used for to be disposed in reciprocal both ends with the cast gate of described Material Filling die cavity; Cast gate can also comprise cold runner (cold runner) structure.

In addition, mould can also comprise: well heater, described well heater are used for heating near the distolateral described cast gate on the length direction of described die cavity, near another of the opposition side of described cast gate place side is distolateral, near described cast gate and described another central portion between distolateral; Temperature sensor; And controller, described controller is used for based on the output of controlling described well heater from the output of described temperature sensor, wherein, described controller can be controlled near the temperature the described cast gate and near described another distolateral temperature opposite with described cast gate place side lower than near the temperature the described central portion.

By using aforesaid OA scraper plate to have the elastic component that can not fill bad suitable shape with the OA scraper plate of mould manufacturing.

The effect of invention

According to the present invention, by being set in the scope of 0.5mm to 0.8mm and making the diameter of cast gate narrower than the diameter of the cast gate of the traditional moulds that usually adopts for the diameter that will before sclerosis, have mobile material and be injected into the cast gate of die cavity, can guarantee material in die cavity best filling speed and suppress to occur to fill bad etc.When the diameter of cast gate during less than 0.5mm, cast gate is narrow undesirably, and rubber foreign matter etc. is easy to get lodged in the cast gate place, and this is so that be difficult to carry out attended operation.On the other hand, when the diameter of cast gate surpasses 0.8mm, can not obtain enough filling speeds.Notice that consider injection pressure, temperature and the viscosity of material and size that will manufactured OA scraper plate, the gate diameter of expectation the best is in the scope of 0.5mm to 0.8mm.

In addition, be provided with at mould in the situation of a plurality of die cavitys, easier generation is filled bad, therefore, and need to be with higher speed packing material.In order to realize this purpose, demanding injection pressure.Yet the injection pressure that excessively increases may cause producing overlap.Aspect this, gate diameter is set at the scope of 0.5mm to 0.8mm, can increase thus the filling speed of material and suppress to occur to fill bad and produce overlap in the situation of little injection pressure.

In addition, by being provided for receiving the overflow part of excess material, can keep the cast gate balance and with material loading mould cavity reliably.In addition, overflow part can be used for receiving the gas of not expecting as acceptance division, and it is bad to suppress reliably that thus filling occurs.

Description of drawings

Fig. 1 illustrates the state of OA device is installed in utilization according to the OA scraper plate of the mould manufacturing of present embodiment synoptic diagram.

Fig. 2 is the planimetric map that the example of utilizing the OA scraper plate of making according to the mould of present embodiment is shown.

Fig. 3 schematically shows conduct for the manufacture of the planimetric map of the structure of the lower module of the part of the mould of OA scraper plate.

Fig. 4 illustrates the integrally-built schematic side elevation that upper mould piece is positioned at the mould on the lower module shown in Figure 3.

Fig. 5 is the block scheme that the control of the electric power that is applied to the well heater that is arranged at upper mould piece and lower module is shown.

(a) of Fig. 6 is the partial enlarged drawing of measuring the OA scraper plate that illustrates in the edge part generation bad method of filling in order to illustrate, the figure that the direction of the arrow A R of (b) of Fig. 6 from Fig. 6 (a) is observed.

Fig. 7 is the figure that illustrates according to another form of the mould of present embodiment.

Embodiment

Hereinafter, embodiments of the present invention are described with reference to the accompanying drawings.Notice that in the embodiment below, will describe take developing blade as an example, still, OA scraper plate of the present invention is not limited to developing blade (developer blade), but goes for other scraper plate.

Fig. 1 illustrates to utilize the synoptic diagram of being installed to the state of OA device according to the OA scraper plate of mould manufacturing of the present invention.In addition, Fig. 2 is the planimetric map that the example of utilizing the OA scraper plate of making according to mould of the present invention is shown.

OA scraper plate 1 comprises: sheet metal 2, and its hard plate by thin and microscler shape forms; With rubber component 3, its elastic component by the part of a surperficial 2a who is arranged in sheet metal 2 forms.For the material of rubber component 3, can preferably adopt thermoset rubber materials such as two component curable polyurethanes, fluororubber, chloroprene rubber, liquid silicones rubber, still, consider from the productive angle of excellence, preferably adopt liquid silicones rubber.

In addition, sheet metal 2 is such as being formed by stainless steel etc.In addition, along the length direction of sheet metal 2 that rubber component 3 is bonding and be fixed to sheet metal 2 by bonding agent.More specifically, clear area BA is arranged on the both sides of OA scraper plate 1, and rubber component 3 is bonded to the central portion between the BA of clear area.

Should note, as shown in Figure 1, OA scraper plate 1 is disposed in the position with the side face butt of the developer roll 100 that rotates, and perhaps be disposed in and the separated a little position of the side face of developer roll 100, and OA scraper plate 1 plays the function of the bed thickness of the developer 101 on the side face 100a of restriction developer roll.According to the sheet material that uses in OA equipment, this OA scraper plate 1 is formed by the sheet metal that manufactures preliminary dimension (for example, the length dimension of B5 to A3 sheet material and width dimensions).

As shown in Figure 2, in OA scraper plate 1, according to application, the profile of rubber component 3 is formed so that suitably be provided with outwards outstanding protuberance or inside recessed recess at edge part or peripheral region.More specifically, OA scraper plate shown in Figure 2 has the notch part HG at the two ends that are positioned at rubber component 3, and forms teat 3TA-1 and the 3TA-2 that projects upwards at the described two ends of rubber component 3.In shown example arrangement, teat 3TA-1 forms corresponding with teat with cast gate, and this cast gate is arranged to give prominence to towards the inboard (towards the noncontact side) of the right-hand member side of the mould of explanation after a while with teat.

In addition, the left end side (opposition side of cast gate side) opposite with aforementioned right-hand member side forms the teat 3TA-2 corresponding with overflow part, and appendix 3PR and teat 3TA-2 extend continuously.Appendix 3PR is as terminal part (dead end section, dead endportion).The outside that appendix 3PR is configured to be positioned at the inboard of teat 3TA-2 rather than is positioned at teat 3TA-2, in other words, appendix 3PR is configured to extend towards teat 3TA-1 side.Form aforesaid teat 3TA-1 and 3TA-2 based on the position of overflow part and the position that is used for the cast gate of injecting material.Can easily understand this point from the explanation to following mould.

In addition, the OA scraper plate mould that is suitable for making above-mentioned OA scraper plate 1 according to present embodiment is described with reference to the accompanying drawings.Fig. 3 is the planimetric map that schematically shows the structure of lower module 10, and this time module 10 is the parts for the manufacture of the mould of OA scraper plate 1.Notice that unshowned upper mould piece has the shape corresponding with lower module 10, when upper mould piece was installed on the lower module 10, upper mould piece is inner to form the shape corresponding with the OA scraper plate.

The lower module 10 that Fig. 3 illustrates is designed to make simultaneously a plurality of OA scraper plates 1 (referring to Fig. 2).This time module 10 is designed to take out a plurality of objects (taking out in the example depicted in fig. 3 four objects).In Fig. 3, in lower module 10, form four die cavity CA-1 to CA-4, be used for making simultaneously four OA scraper plates.Sheet metal 2 (referring to Fig. 2) is arranged on the precalculated position of lower module 10.At this moment, die cavity CA-1 to CA-4 all is positioned at the below of sheet metal 2.Utilize this structure, make as follows the OA scraper plate 1 that makes rubber component 3 be positioned at the precalculated position: the sheet metal 2 that is coated with in advance bonding agent is set; Upper area with the lower module of unshowned upper mould piece sealing; With each die cavity among the Material Filling die cavity CA-1 to CA-4; Make the material sclerosis.

Should be noted that Reference numeral 14 expressions among Fig. 3 are used for material is supplied to the cast gate (inlet) of die cavity CA-1.In shown exemplary mold, the die cavity CA-1 to CA-4 with downward convex is set to lower module 10 sides.After sheet metal 2 is arranged on each die cavity among the die cavity CA-1 to CA-4, injects raw materials and make raw material flow into the downside of sheet metal 2 from cast gate 14.For this reason, the position corresponding with cast gate 14 that the through hole that is used for material is passed through is arranged on sheet metal 2.Notice that the mould that illustrates in this instructions only is an example of the embodiment of mould, can adopt die cavity to be positioned at the mould of upper mould piece side.

Describe the characteristic structure that is applicable to according to mould of the present invention in detail with reference to Fig. 2, Fig. 3 and Fig. 4.Fig. 4 illustrates the integrally-built schematic side elevation that upper mould piece 15 is positioned at the mould 5 on the lower module 10 shown in Figure 3, and Fig. 4 is the figure along the intercepting of the line A-A Fig. 3 that observes from the direction of arrow.

The upper mould piece 15 of mould 5 is provided with: flow path portion (runner portion) 23,24, it is used for receiving the material MA that supplies with via sprue (sprue) 41 from injection nozzle 40, and is used for transmitting material MA towards the die cavity CA of lower module 10.These

flow path portion

23,24 common formation cold runner.Be arranged in the outlet of lower end of flow path portion 24 of downward-extension as material being injected into the aforementioned cast gate 14 of die cavity CA.Shown in the amplifier section in the circle, the diameter D of cast gate 14 is preferably placed at the scope of 0.5mm to 0.8mm.In addition, the diameter D of cast gate 14 more preferably is positioned at the scope of 0.6mm to 0.8mm.This can guarantee material in die cavity best filling speed and can suppress occur to fill bad.Suppose the to have described gate diameter cast gate of (diameter D) is for circular.Yet, be applicable to OA scraper plate according to the present invention and be not limited to circle with the shape of the cast gate of mould, can also comprise ellipse.In oval-shaped situation, major diameter can be set at the scope of 0.5mm to 0.8mm.

When the diameter of cast gate during less than 0.5mm, cast gate is narrow undesirably, and the rubber foreign matter is easy to get lodged in the cast gate place, so that be difficult to carry out attended operation.On the other hand, when the diameter of cast gate surpassed 0.8mm, it is not enough that filling speed is tending towards, the situation that may cause die cavity fully not filled by material.

Expectation mould 5 has for the cold runner structure of coolant as required, being injected in the die cavity reliably such as thermosets such as liquid silicones.As mentioned above,

cold runner

23,24 adopts cold runner structure.

As shown in Figure 4, be cooled cover (cooling jacket) 26 of the part of flow path portion 24 surrounds, and flow path portion 24 is constructed to the cold runner that can cool off.More specifically, the flow path portion 24 with tubular space is contacted with tubular cooling jacket 26 via the lining 25 that forms flow path portion 24.Cooling jacket 26 is provided with for delivery of the cooling line 27 such as heat eliminating mediums such as chilled waters.By heat eliminating medium being imported in the cooling line 27 and making heat eliminating medium pass through cooling line 27, the interior flow path portion 24 of cylinder that is arranged on cooling jacket 26 is cooled, thereby can with by flow path portion 24 maintain the temperature that is not easy to harden such as material MA such as liquid silicones, and can prevent the sclerosis.Notice that the PL among Fig. 4 represents separator bar.The upside of PL represents upper mould piece 15, and the downside of PL represents lower module 10.

Around the die cavity CA of lower module 10, be used for making the well heater 32 of the thermosets MA sclerosis that is injected into die cavity CA to be arranged in the lower module 10 and the downside of upper mould piece 15.Upper mould piece 15 also is provided with cooling line 31, even when material MA remains in the

flow path portion

23,24, this cooling line 31 also can prevent material MA sclerosis.Except the cold runner structure around the flow path portion 24, the whole zone on the top of cooling line 31 cooling upper mould piece 15.At the center section of upper mould piece 15,

heat insulation layer

28,29 is set as the preferred structure that is used for improving the thermal efficiency.

Explanation preferably is applicable to the temperature control of mould 5 with reference to the accompanying drawings.Fig. 5 is the block scheme that the control that is applied to the electric power that is arranged on the well heater 32 in upper mould piece 15 and the lower module 10 is shown.In Fig. 5, the well heater 32 of letter " U " expression upper mould piece 15 sides, the well heater 32 of lower module 10 sides of letter " D " expression.In addition, letter " R " expression is positioned near the cast gate 14 on right side of horizontal direction well heater, opposition side that letter " L " expression is positioned at cast gate, be horizontal direction the left side (namely, the opposition side on aforementioned right side) near the well heater, the well heater of the middle position of letter " C " expression between described left and right sides well heater.

Yet each well heater 32 (32UL, 32UC, 32UR, 32DL, 32DC and 32DR) among Fig. 5 is not to want to be depicted as different well heaters, but wants in schematic and conceptual mode these well heaters to be shown.

For example, as shown in Figure 4 in the situation of the length direction of mould six well heaters 32 of compartment of terrain configuration in each side of upper mould piece 15 and lower module 10, in Fig. 5, up and down four well heaters that are positioned at the right side consist of 32UR and 32DR; Up and down four well heaters that are positioned at the left side consist of 32UL and 32DL; Up and down four well heaters between right side well heater and left side well heater consist of 32UC and 32DC.

Controller CNT control is applied to the electric power of each well heater 32UL, 32UC in the upper mould piece 15 and 32UR and is applied to each well heater 32DL, 32DC in the lower module 10 and the electric power of 32DR.So, as shown in Figure 4, left and right and middle position difference set temperature sensor 35UL, 35UR and 35UC in upper mould piece 15, at the left and right and middle position of lower module 10 respectively set temperature sensor 35DL, 35DR and 35DC, controller CNT preferably controls near the die cavity CA temperature by checking from the output of these temperature sensors.

More specifically, controller CNT controls, so that near the temperature of the opposition side (the L side of the left side of Fig. 4 and Fig. 5) of near the temperature of cast gate (the R side of the right side of Fig. 4 and Fig. 5) and cast gate is lower than near the temperature of central portion (the C side of the central portion of Fig. 4 and Fig. 5).By making gate diameter narrower and under the state of controlling as mentioned above temperature material MA is supplied in the die cavity than the gate diameter of conventional art, can effectively make following OA scraper plate: this OA scraper plate has the rubber component 3 that forms the sharp edges form.Note, the arrangement of well heater is not limited to above-mentioned structure, the arrangement of well heater can be designed such that the variable density (for example, can dispose a large amount of well heaters at central portion) of well heater, and produces temperature difference between central portion and each sidepiece.

In addition, the preferred temperature of measuring the surface of die cavity, and preferably the Temperature Setting of the opposition side of the temperature of gate part and gate part being become hangs down more than 5 ℃ than the temperature of central portion, consider clamp operation (clamping operation), more preferably the Temperature Setting of the opposition side of the temperature of gate part and gate part is become than low 5 ℃ to 15 ℃ of the temperature of central portion.

Will be referring again to the preferred structure of Fig. 3 explanation according to the mould 5 of present embodiment.

With the structure that explanation overflows from die cavity CA for the material that makes formation rubber component 3, wherein, rubber component 3 is attached to the surperficial 2a of sheet metal 2.In mould according to the present invention, adopt the liquid thermoset silicone as the material that is used to form rubber component 3.Make the material of above-mentioned thermoset rubber flow into (injection) to the die cavity CA (space) of the shape that is shaped as rubber component 3 from being arranged at outside injection device 40.By with material loading mould cavity reliably, can make the OA scraper plate of the rubber component 3 with sharp keen shape.For this reason, present embodiment adopts following structure: from cast gate 14 excessive material is supplied to die cavity CA, that is, quantity of material is a little more than the volume of die cavity, and the material of supplying with overflows (leaking out) from the cast gate opposition side.This can extrude the gas of not expecting (air) that may be present in the die cavity from die cavity, and can be with material loading mould cavity reliably.

Especially, as Fig. 3 illustrated, in the situation of the mould that is used for taking out a plurality of objects, gate diameter was set at the scope of the aforesaid 0.5mm to 0.8mm narrower than the gate diameter in the conventional art, guaranteeing best filling speed, and adopt the structure that makes the material overflow.Therefore, kept the cast gate balance, and suppressed the variation of the loading between the die cavity, even can when making a plurality of OA scraper plate, also can not fill poorly formed rubber component thus.

Because the die cavity CA-1 to CA-4 among Fig. 3 has identical structure, therefore film chamber CA-1 will be described.When describing die cavity CA-1 in detail, main die cavity (originally die cavity) MC-1 that is used to form rubber component 3 forms the principal space, and the little secondary die cavity SC-1 that is communicated with main die cavity space is attached to main die cavity MC-1.Secondary die cavity SC-1 is as terminal space (dead space).Notice that in Fig. 3, Reference numeral 14 expressions are used for material is injected into the cast gate of die cavity CA-1.

The purpose that secondary die cavity SC-1 is set is the material that overflows from main die cavity MC-1 side for reclaiming.By material is flow among the secondary die cavity SC-1, can be full of main die cavity MC-1 with material.Notice that expectation also arranges restriction (throttle portion) 11 between main die cavity MC-1 and secondary die cavity SC-1, the sectional area of the stream that supplies Material Flow of this restriction 11 is reduced.Utilize restriction 11, the resistance of the stream of advancing towards secondary die cavity SC-1 increases.Therefore, when the material overflow, utilize enough stuffing pressures (injection pressure) material could be pushed among the secondary die cavity SC-1.This and can make the OA scraper plate of the rubber component with sharp keen shape so that can prevent to fill bad, and this rubber component has stable edge.

As shown in Figure 3, at the two ends of the Width of main die cavity MC-1,

teat

12,13 is to be arranged at the main die cavity MC-1 of lower module 10 towards the outstanding mode of a side that does not contact with developer (towards the upside of Fig. 3).Overflow part is arranged at each teat 12,13.Be provided for as described above receiving the overflow part of excess material, can be full of reliably die cavity with described material, and can be with overflow part with the acceptance division that act on the gas that reception do not expect, can suppress reliably thus to occur to fill bad.

Should be noted that in the both sides at main die cavity that illustrate such as Fig. 3 to have in the structure of teat, the space between the teat is as above-mentioned dead space, and secondary die cavity SC-1 and appendix 3PR can be arranged in this space, can effectively utilize the space thus.Why be appreciated that from above-mentioned explanation that teat 3TA-1 and 3TA-2 project upwards in the both sides of rubber component 3 in OA scraper plate 1 shown in Figure 2.

In addition, with reference to the preferred structure of Fig. 3 explanation according to the mould 5 of present embodiment.The die cavity CA-1 to CA-4 that the O-ring seal (gasket) 17 that is used for sealing centers on lower module 10 arranges, and vacuumizes the inboard (in Fig. 3, the section that vacuumizes extends below O-ring seal) that section 18 is formed on O-ring seal 17.Vacuumize section 18 and be configured to be connected with outside getter device 19, thus can make die cavity in the O-ring seal 17 around (inner space of die cavity) evacuation.By aforesaid structure be used to vacuumizing further is set, can with being adjusted to low pressure around the die cavity, can make thus the material of overflow successfully flow to secondary die cavity SC-1.

The shape that should be noted that the mould that adopts is not limited to above-mentioned shape, can adopt the mould with various shapes, for example as shown in Figure 7 shape.

Embodiment

Prepare under the following conditions mould.Make the OA scraper plate with prepared mould, and confirm to be formed on the shape of the rubber component on the sheet metal.

Side at the length direction of each mould arranges cast gate, this cast gate be disposed on the Width in a side-prominent teat that does not contact with developer.Opposition side at cast gate arranges overflow part.The diameter of cast gate is set at the scope of 0.5mm to 0.80mm.

The stainless steel of microscler shape (size: length is 18.3mm, and width is 239.1mm, and thickness is 0.1mm) is prepared as sheet metal and is placed on the precalculated position of lower module.

In addition, the material that adopts is that viscosity is 500Pas (0.9s ^-1) to 800Pas (0.9s ^-1) and be stored at normal temperatures outside liquid silicones.By pump feed fluid silicone, via injection nozzle liquid silicones is supplied to flow path portion in the mould.

The material MA that will flow in this cold runner structure by the cold runner structure of cooling line 31 in the upper mould piece 15 of control mould 5 maintains 10 ℃ to 15 ℃ temperature.In addition, controlling temperature by the well heater 32 in control upper mould piece 15 and the lower module 10 so that near the gate part and near the temperature the part of the opposition side of gate part than near the low state of the temperature the central portion under, will be injected among the die cavity CA of lower module 10 via the diameter cast gate narrower than the diameter of the cast gate of conventional art as the liquid silicones of described material.Notice that the filling speed of material is set at the scope of 20mm/s to 60mm/s at this moment.

Should be noted that the standard size that is formed under these conditions the rubber component on the sheet metal is as follows: the length on the length direction of main part (lateral dimension) is 221.0mm; Length (longitudinal size) on the Width vertical with length direction of main part is 4.5mm; The thickness of main part is 1.5mm.Length on the length direction of teat is 9.0mm, and the length on the Width of teat is 4.5mm, and the thickness of teat is 0.7mm.

Below table 1 show the temperature of each position among the embodiment and comparison (tradition) example temperature (℃).

[table 1]

	Embodiment	Comparative example
			Near the cast gate	160	170
Near the central portion	170	170
			Near the opposition side of cast gate	160	170

In conventional art, the temperature that is injected into the material in the die cavity is in about 150 ℃ to 190 ℃ scope.In addition, conventional art does not adopt especially and makes the temperature control that has temperature difference in the mould, and as shown in table 1, the temperature in the traditional moulds is remained on for example 170 ℃ equably.

On the other hand, in an embodiment, near the temperature near the temperature the cast gate and the opposition side of cast gate is configured to be lower than near the temperature of central portion, more specifically, near near the cast gate temperature and the opposition side of cast gate temperature is 160 ℃, and near the temperature the central portion is 170 ℃.

Utilization has reduced significantly according to the OA scraper plate of the mould manufacturing of above-described embodiment fills bad generation, thereby has reduced the incidence of edge defect.Utilization has radius-of-curvature r according to the rubber component of the mould manufacturing of the comparative example that represents conventional art and is the edge defect of 0.5mm, on the other hand, rubber component according to embodiment has the edge that radius-of-curvature r is 0.1mm to 0.2mm, has significantly improved the shape at edge.More specifically, the rubber component on the sheet metal of being formed on according to embodiment has sharp keen shape with sharp edges.

In addition, following table 2 shows, gate diameter at mould is changed to 0.40mm, 0.50mm, 0.60mm, 0.70mm, 0.80mm, 1.00mm and 1.35mm, and in the cast gate temperature of this mould situation about also changing, the generation in the mould is filled unfavorable condition and produced the overlap situation.

(a) that should be noted that Fig. 6 measures the bad method of filling that occurs at edge part and the partial enlarged drawing of the OA scraper plate that illustrates, the figure that the direction of the arrow A R of (b) of Fig. 6 from Fig. 6 (a) is observed in order to illustrate.Shown in the SH in Fig. 6 (a) and Fig. 6 (b), fill easily bad at edge part.By observing this part with the multiplying power more than 30 times, measurement is at the degree of depth (thickness) L (mm) of the disappearance section (missing portion) of the side edge part generation of rubber section, and is bad to judge whether having filling.Filling bad evaluation criterion comprises: when degree of depth L during less than 0.2mm for good (OK) (O1); When degree of depth L is good (O2) during more than the 0.2mm and less than 0.25mm; When degree of depth L be 0.25mm when above be bad (NG) (N).

[table 2]

Filling speed: 30mm/s

The viscosity of material: 800Pas (0.9s ^-1)

The hardness of product: 70 ° (JIS A)

O1 (OK): less than 0.2mm

More than O2 (OK): the 0.2mm and less than 0.25mm

N (NG): more than the 0.25mm

As can from table 2 is clear understand, the rubber component that gate diameter is set at the scope of 0.5mm to 0.8mm demonstrates good result, that is, the degree of depth of disappearance section is little and less than 0.25mm.In addition, except gate diameter is the situation of 0.5mm, near the cast gate of die cavity and near the temperature of the material the part of the opposition side of cast gate be configured in the situation less than the temperature of the material of central portion, the degree of depth of disappearance section is little.On the other hand, the gate diameter rubber component that is set at 1.00mm and 1.35mm shows that the degree of depth of the disappearance section of sening as an envoy to increases to more than the 0.25mm.In addition, be set at gate diameter in the situation of 0.4mm, the obstruction of generating material, and can not finish measurement.

These are specifying preferred implementation of the present invention.Yet, the invention is not restricted to these concrete embodiments, in the described scope and spirit of the present invention of claims, can carry out various variants and modifications to the present invention.For example, the situation that taking-up has been arranged on four a plurality of objects in the die cavity is illustrated.Yet, the invention is not restricted to this, can take out above four objects.For example can adopt eight die cavitys.

Utilizability on the industry

As can according to the present invention, providing a kind of manufacturing OA scraper plate mould from being expressly understood the above-mentioned explanation, it suppresses to occur to fill bad and overlap occurs.This OA scraper plate helps to improve the yield rate of product with mould.

Claims

1. OA scraper plate mould, described mould can be used in makes the OA scraper plate with long hard plate and elastic component, and described elastic component is arranged on the described long hard plate along the length direction of described long hard plate, and described mould comprises:

Die cavity, it forms the shape corresponding with described elastic component; With

Cast gate, it is injected into described die cavity for the material that just forms described elastic component from the outside,

Wherein, the diameter of described cast gate is set at the scope of 0.5mm to 0.8mm,

Described mould also comprises:

Well heater, described well heater are used for heating near the distolateral described cast gate on the length direction of described die cavity, near another of the opposition side of described cast gate place side is distolateral, near described cast gate and described another central portion between distolateral;

Temperature sensor; With

Controller, described controller is used for based on the output of controlling described well heater from the output of described temperature sensor,

Wherein, described controller is controlled near the temperature the described cast gate and near described another distolateral temperature opposite with described cast gate place side lower than near the temperature the described central portion.

2. OA scraper plate mould according to claim 1 is characterized in that,

Described mould is equipped with a plurality of described die cavitys.

3. OA scraper plate mould according to claim 1 is characterized in that,

The quantity that is set to the described cast gate of described die cavity is 1.

4. OA scraper plate mould according to claim 2 is characterized in that,

5. OA scraper plate mould according to claim 1 is characterized in that,

Described die cavity is provided with teat, and described teat forms the part of described die cavity and gives prominence to than other parts,

Described gate placement is at described teat.

6. OA scraper plate mould according to claim 1 is characterized in that described mould also comprises:

Overflow part, described overflow part are used for reclaiming the material that is injected into described die cavity and overflows from described die cavity, and described overflow part is arranged on the opposition side of described cast gate place side in the longitudinal direction.

7. OA scraper plate mould according to claim 6 is characterized in that,

Thermosets is used as described material;

Described overflow part and be used for being disposed in reciprocal both ends with the described cast gate of the described die cavity of described Material Filling; With

Described cast gate also comprises cold runner structure.

8. OA scraper plate utilizes in the claim 1 to 7 each described OA scraper plate to make described OA scraper plate with mould.