CN207239111U - A kind of die-casting forming die of LED display module bottom case - Google Patents

Abstract

LED display manufacturing technology field is the utility model is related to, especially a kind of die-casting forming die of LED display module bottom case.It includes preceding mould assembly and rear mould assembly, the die joint of mould assembly offers rear die casting shaping area, the charging runner and discharge sprue that are connected with rear die casting shaping area afterwards, and charging runner includes charging sprue and the transverse flow channels area for feeding sprue is connected and is in the charging secondary flow road in same plane with charging sprue by several with rear die casting shaping area；The die joint of preceding mould assembly offers preceding mold forming area, formed with being cast into cavity between preceding mold forming area and rear die casting shaping area.The mould of the utility model can ensure that the stability of the flatness of cast product and the accuracy of thickness, improve the dimensional stability of casting finished products and reduce the dosage of die casting raw material and the yield of waste material, be conducive to save die casting raw material, reduce the manufacture cost of module bottom case；Its is simple and compact for structure, has very strong practical value and market popularization value.

Description

A kind of die-casting forming die of LED display module bottom case

Technical field

LED display manufacturing technology field is the utility model is related to, especially a kind of die casting of LED display module bottom case Molding die.

Background technology

It is well known that LED display is with the abundant color of its change, pattern, dynamic display pattern is realized, perfectly Multimedia and powerful visual impact, information, word, picture, animation and video etc. are shown in many ways A kind of epoch-making information propagate application product, in various buildings, railway, civil aviaton, stadiums, conference halls, high speed It is widely used in the places such as highway.Important component of the LED display module bottom case as LED display module One of, its final product quality can directly influence the quality and performance of LED display module.

At present, the manufacturing process of the bottom case of traditional LED display module is mainly compression molding process, and die cast Mould is then the core mold components for realizing compression molding process, since die-casting forming die exists necessarily in terms of structure design The defects of, not only result in the final product quality of bottom case can not obtain effective control, and the technique stream that class mould is carried out according to this Journey also results in bottom case finished product there are certain mass defect there is also many drawbacks, is embodied in：

1st, the runner of traditional die-casting forming die and the design of deslagging exhaust block are unreasonable, the die-casting material gold not only melted Each shaping position can not efficiently and uniformly be branched to by belonging to liquid, and exhaust gas and waste material can not be efficiently controlled, so that So that mould is in use, often there is material utilization amount greatly and waste than more serious, bottom case casting (i.e.：Product) easily receive Compression deformation, because cinder ladle is blocked up cause deformation of products or there are the problems such as cinder hole；

2nd, the stability of the flatness of product and the accuracy of thickness can not ensure that product size is unstable, and fraction defective is inclined It is high；Meanwhile the manufacture cost of product entirety remains high, it is necessary to using numerous and diverse treatment process, so as to cause the production of product Excessive cycle, time cost rise, production efficiency is low.And class mould carries out compression molding process generally using as follows according to this Process, i.e.,：Die casting → die cast → school shape → remove die casting burr → mono- time epithelium → dust → CNC Milling Machinings → go Ten procedures such as burr → secondary epithelium → electrophoresis after CNC processing；Wherein, the product produced by die cast process It can not generally ensure the smoothness of its plane and the levels of precision of thickness, therefore need first to correct shape processing, then pass through again The processes such as follow-up CNC processing deburring can reach product flatness and thickness requirement (i.e.：It is related to CNC processing works The main purpose of sequence is exactly that the shape to product, flatness, thickness, drilling, tapping etc. carry out after-treatment).

It is that using the main reason for above-mentioned operation：A, rigging position can generally be reserved when bottom case drawing is designed Allowance, so product out after will again by school shape, burring, CNC processing etc. process processing after can reach To drawing requirement；B, evade as far as possible because being easy to cause deformation of products, ruler the design defect of the runner of mould and deslagging exhaust block Very little the problem of easily shrinking.When c, due to producing product with such mould, materials are more so that its structure is more sturdy, thus The stability of the processes such as just follow-up CNC processing can be protected, but so undoubtedly influences whether the production cost of product, artificial assembling The cost of transportation of cost and product.

Utility model content

In view of the deficiency of the prior art, the purpose of this utility model is to provide a kind of LED display module The die-casting forming die of bottom case.

To achieve these goals, the utility model adopts the following technical solution：

A kind of die-casting forming die of LED display module bottom case, it is included each other in the preceding mould of stacked distribution up and down Assembly and rear mould assembly, it is described after mould assembly die joint on offer one after die casting shaping area, one positioned at rear die casting into The front side in type area and the charging runner being connected with rear die casting shaping area and after several are located at rear die casting shaping area Side and the discharge sprue being connected with rear die casting shaping area, the charging runner are in class " T " including a plane projected shape Shape charging sprue and several each other in parallel arranged be distributed and respectively by feed sprue transverse flow channels area with The charging secondary flow road that die casting shaping area is connected afterwards, the charging sprue and charging secondary flow road are in same plane；Institute State the preceding mold forming area that a position opposite with rear die casting shaping area is offered on the die joint of preceding mould assembly, the preceding mold forming area Between rear die casting shaping area cavity is cast into formed with one；One is provided with the preceding mould assembly and/or on rear mould assembly The feeding-passage being connected with charging sprue.

Preferably, also opened up respectively on the die joint of the rear mould assembly and positioned at the left and right sides of rear die casting shaping area There are several discharge secondary flow roads, the discharge secondary flow road is connected with rear die casting shaping area.

Preferably, central point of the feeding-passage on the die joint of rear mould assembly and the left and right of rear die casting shaping area Vertical range between the extended line at edge is 120mm-150mm.

Preferably, it is further opened with deslagging exhaust stream on the die joint of the rear mould assembly and on rear side of discharge sprue Road area, the deslagging grate flow channel area include at least two and are arranged in the rear mold deslagging teeth groove of left and right parallel arranged, adjacent two Isolate arm formed with a rear mold between the rear mold deslagging teeth groove row, it is chimeric that contraposition is provided with the die joint of the preceding mould assembly Between the preceding mould deslagging double wedge row in rear mold deslagging teeth groove row, adjacent two preceding mould deslagging double wedges rows formed with one with Rear mold isolation arm isolate preceding mould isolation channel of the arm in stacked distribution up and down with respect to position and with rear mold, the rear mold deslagging teeth groove arrange and Discharge sprue is connected.

Preferably, the deslagging teeth groove that each rear mold deslagging teeth groove row is distributed side by side before and after each other by several It is composed.

Preferably, the preceding mould assembly include offering before one on a die joint the preceding mould bases of die cavity and one be flush-mounted in before Front cavity in die cavity, the preceding mold forming area are opened on the die joint of front cavity, the preceding mould isolation channel and preceding mould deslagging Double wedge row may be contained within the die joint of preceding mould bases；

Mould assembly includes a die joint and offers the rear mould bases of die cavity after one and one flush-mounted in rear mold intracavitary after described Rear cavity, rear die casting shaping area, charging runner and the discharge sprue are opened on the die joint of rear cavity, the row Slag grate flow channel area is arranged on the die joint of rear mould bases；

After the feeding-passage includes the barrel before being arranged at along the vertical direction in mould bases and is arranged at along the vertical direction Spreader in mould bases, the spreader are connected sprue is fed with barrel.

Preferably, the rear mould assembly further includes the lower section for being arranged at rear mould bases and the mould being distributed around the edge of rear mould bases Foot, be installed in rear mould bases lower surface central area support column, the Ejector Retainer Plate that is set on support column and thimble panel with It is described and bottom is installed on thimble panel and top sequentially through the thimble of rear mould bases, rear die cavity and rear cavity distribution A thimble driver for driving thimble to move up and down relative to Ejector Retainer Plate by thimble panel is equiped with Ejector Retainer Plate.

Preferably, the edge of the die joint of the rear cavity is provided with positioning protrusion, the die joint of the front cavity Edge is offered for the chimeric positioning groove of positioning protrusion contraposition.

As a result of such scheme, the utility model uses the feeding manner similar to comb shape to enable die casting raw material equal Die cast intracavitary is entered by the front side in rear mold molding runners area evenly, and finally ensures the flatness of molding bottom case casting Stability (the controllable margin of tolerance ± 0.15mm) and thickness accuracy (the controllable margin of tolerance is ± 0.03mm), improve casting The dimensional stability of part finished product；Since auxiliary flow path portion and sprue portion are by the way of same plane distribution, die casting original can be reduced The dosage of material and the yield of waste material, are conducive to save die casting raw material, reduce the manufacture cost of module bottom case；Meanwhile utilize The deslagging exhaust block of segmented version, the clout for being conducive to be extruded can be in deslagging grate flow channel areas by equably die cast To form cinder ladle, avoid the occurrence of traditional moulds because be easy to cause using the deslagging exhaust block of a monoblock the problem of cinder ladle is partially thick with And due to clout can not be extruded equably out of forming cavity and easily mould casting size is unstable, yielding, there are cinder hole The problems such as；Its is simple and compact for structure, has very strong practical value and market popularization value.

Brief description of the drawings

Fig. 1 is planar structure perspective view of the mould of the utility model embodiment under main view state；

Fig. 2 is the structural decomposition diagram of the mould of the utility model embodiment in the operating condition；

Fig. 3 is planar structure schematic diagram of the rear mould assembly of the utility model embodiment under vertical view state；

Fig. 4 is the Standard schematic diagram (one) of the rear mould assembly of the utility model embodiment；

Fig. 5 is the Standard schematic diagram (two) of the rear mould assembly of the utility model embodiment；

Fig. 6 is planar structure perspective view of the preceding mould assembly of the utility model embodiment under state of looking up；

Fig. 7 is the Standard schematic diagram of the preceding mould assembly of the utility model embodiment；

Fig. 8 is that the rear plan structure when bottom case casting of the utility model embodiment is handled without CNC manufacturing procedures is shown It is intended to；

Fig. 9 is that the front plan structure when bottom case casting of the utility model embodiment is handled without CNC manufacturing procedures is shown It is intended to；

Figure 10 is that rear plan structure of the bottom case casting of the utility model embodiment after the processing of CNC manufacturing procedures is shown It is intended to；

Figure 11 is that front plan structure of the bottom case casting of the utility model embodiment after the processing of CNC manufacturing procedures is shown It is intended to.

Embodiment

The embodiment of the utility model is described in detail below in conjunction with attached drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

As shown in Figures 1 to 7 and with reference to Fig. 8 to Figure 11, a kind of pressure of LED display module bottom case provided in this embodiment Type casting moulding mould, a kind of die-casting forming die of LED display module bottom case provided in this embodiment, it includes presenting each other Lower stacked distribution simultaneously can make the preceding mould assembly a and rear mould assembly b of upper and lower relative motion, be opened up on the die joint of rear mould assembly b Having die casting shaping area c after one, (its planform mainly according to the back side of module bottom case is specifically set, generally class Be similar to the texture structure of channel form), one be connected positioned at the front side of rear die casting shaping area c and with rear die casting shaping area c Feed runner and several discharge masters for being located at the rear side of rear die casting shaping area c and being connected with rear die casting shaping area c Runner d；Wherein, feed runner include a plane projected shape in the "T"-shaped charging sprue 1 of class and several be in each other The charging secondary flow that parallel arranged is distributed and the transverse flow channels area for feeding sprue 1 is connected with rear die casting shaping area c respectively Road 2, charging sprue 1 and charging secondary flow road 2 are in same plane；Meanwhile offer one on the die joint of preceding mould assembly a Position opposite with rear die casting shaping area c preceding mold forming area e (its mainly according to module bottom case front surface planform into Row is specific to be set, generally the texture structure similar to channel form), the shape between preceding mold forming area e and rear die casting shaping area c Cheng Youyi is cast into cavity (not shown in figure, its main function is to ensure that module bottom case has certain thickness)；Preceding A feeding-passage being connected with charging sprue 1 is provided with mould assembly a and/or on rear mould assembly b.

Thus, whole mould is being combined according to certain rule and position and is being fixed in such as die casting machine After in equipment, control preceding mould assembly a and rear mould assembly b is relatively closed (i.e.：Carry out the molding control of mould) with therebetween Form relative closure is cast into cavity, and feeding-passage then is connected high injection material equipment again, to utilize major ingredient equipment phase mould The die casting raw material of injection liquid or semi liquid state (generally molten metal liquid) in tool, due to being led by charging secondary flow road 2 and charging The charging runner that runner 1 is formed appears similar to the feeding-passage of comb teeth-shaped (i.e. on the whole：Equivalent to the charging of comb shape Mode), it is ensured that die casting raw material equably can enter die cast intracavitary by the front side of rear die casting shaping area c, and most Filled uniformly with eventually according to the structural form in molding runners area and forming cavity, so as to can effectively ensure that molding bottom case casting The stability (the controllable margin of tolerance ± 0.15mm) of the flatness of part and the accuracy of thickness (the controllable margin of tolerance for ± 0.03mm), the dimensional stability of casting finished products is improved；Simultaneously as charging secondary flow road 2 is put down with charging sprue 1 using same The mode of EDS maps, is not in the height produced in traditional moulds because two parts are by the way of the tilt distribution between the two Degree is poor, therefore can reduce the dosage of die casting raw material and the yield of waste material, is conducive to save die casting raw material, reduces module bottom case Manufacture cost.

, can to ensure to be filled in the die casting raw material of die cast intracavitary under the effect of the pressure during coagulation forming Clout to be extruded provides the circulation passage of abundance, on the die joint of rear mould assembly b and positioned at rear die casting shaping area c's The left and right sides also offers several discharge secondary flows road f respectively, and discharge secondary flow road f is connected with rear die casting shaping area c.By This, the clout being extruded can be filled in discharge sprue d and discharge secondary flow road f, so as to ensure the overall matter of mould casting Dose-effect fruit provides safeguard.Preferably, each discharge sprue d in the present embodiment and each discharge secondary flow road f It is composed of a cinder ladle area 19 and at least one exhaust passage being connected with cinder ladle area 19 or deslagging exhaust passage 20, with Just in clout during being extruded, part clout can be stored in cinder ladle area 19 under the action of exhaust passage with shape Into cinder ladle, another part clout then can be discharged to specified region by deslagging exhaust passage 20.

To shorten the flow distance of raw material to greatest extent, ensure raw material can evenly into die cast intracavitary, into Between the extended line for expecting the left and right side edge of central point and rear die casting shaping area c of the passage on the die joint of rear mould assembly c Vertical range is preferably controlled between 120mm-150mm (i.e.：The control the distance between from the center line of feeding-passage to product sideline Between 120mm-150mm).

To optimize the performance of whole mould to greatest extent, on the die joint of rear mould assembly b and it is located at discharge sprue d Rear side be further opened with deslagging grate flow channel area g, deslagging grate flow channel area g includes at least two rear molds for being in left and right parallel arranged Deslagging teeth groove arranges 3 (the present embodiment is preferably three), between adjacent two rear mold deslagging teeth groove row 3 formed with a rear mold every From arm 4, correspondingly, the preceding mould deslagging that contraposition is embedded in rear mold deslagging teeth groove row 3 is provided with the die joint of preceding mould assembly a Double wedge row 5, between adjacent two preceding mould deslagging double wedges rows 5 formed with one isolate with rear mold the position relatively of arm 4 and with rear mold every Preceding mould isolation channel 6 from arm 4 in stacked distribution up and down, rear mold deslagging teeth groove row 3 are connected with discharge sprue d.Thus, utilize Cooperation and rear mold between rear mold deslagging teeth groove row 3 and preceding mould deslagging double wedge row 5 are isolated between arm 4 and preceding mould isolation channel 6 Coordinate, a deslagging exhaust block for being similar to segmented version can be formed in mould and positioned at the posterior region of discharge sprue d, The clout for being conducive to be extruded can form cinder ladle in deslagging grate flow channel area g by equably die cast, avoid the occurrence of Traditional moulds using the deslagging exhaust block of a monoblock because being easy to cause the problem of cinder ladle is partially thick and since clout can not be equal Extrude evenly out of forming cavity and easily mould casting size is unstable, yielding, there are the problems such as cinder hole.

As a preferred solution, each rear mold deslagging teeth groove row 3 of the present embodiment is mutual in front and rear by several The deslagging teeth groove being distributed side by side is composed, and correspondingly, the double wedge in preceding mould deslagging double wedge row 5 is also using the arrangement point of opposite position Cloth form, to ensure that the clout being extruded can be equably cast into cinder ladle.

To optimize the structure of whole mould to greatest extent, the preceding mould assembly a of the present embodiment includes opening up on a die joint There is front cavity 8 of the preceding mould bases 7 and one of die cavity before one in preceding die cavity (can be improved by structure and function, preceding Driving device is set in mould bases so that front cavity 8 can move up and down in preceding die cavity, so as to meet in actual use to mould The adjustment control demand of tool), preceding mold forming area e is opened on the die joint of front cavity 8, and preceding mould isolation channel 6 and preceding mould deslagging are convex Tooth row 5 then may be contained within the die joint of preceding mould bases 7 (both can be also installed in by independent driving part before on mould bases 7, with Meet the actual use demand to the adjustment control of mould)；Mould assembly b includes the rear mold that a die joint offers die cavity after one afterwards Frame 9 and one is flush-mounted in the rear cavity 10 of rear mold intracavitary, and rear die casting shaping area c, charging runner and discharge sprue d are opened up In on the die joint of rear cavity 10, and deslagging grate flow channel area g is then arranged on the die joint of rear mould bases 9；Meanwhile feeding-passage Then include the barrel 11 being arranged at along the vertical direction in preceding mould bases 7 and the spreader being arranged at along the vertical direction in rear mould bases 9 12,12 sleeve of spreader is connected in barrel 11 and by charging sprue 1 with barrel 11.Thus, by preceding mould assembly a and The structure of mould assembly b is improved afterwards, it is assembled by multiple components, to provide structure base for the specific regulation and control control to mould Plinth.

In addition, for ease of mould is assemblied in the equipment such as die casting machine, while will can be molded easy to operating personnel Casting takes out out of mould, and the rear mould assembly b of the present embodiment further includes the lower section for being arranged at rear mould bases 9 and surrounds rear mould bases 9 The support block 13 of edge distribution, the support column 14 of lower surface central area for being installed in rear mould bases 9, the top that is set on support column 14 Pin bottom plate 15 and thimble panel 16 and bottom are installed on thimble panel 16 and top is sequentially through rear mould bases 9, rear mold The thimble 17 that chamber and rear cavity 10 are distributed, meanwhile, one is equiped with Ejector Retainer Plate 15 thimble 17 is driven by thimble panel 16 The thimble driver 18 to move up and down relative to Ejector Retainer Plate 15.Thus, then can be to mould using support block 13 and support column 14 Main body provide a supporting role, use easy to the assembling of the equipment such as mould and die casting machine, and by the control to thimble 17, then may be used The exercise effect moved up and down using it, after die casting raw material die cast, is jacked up from the side of mould casting, in order to Operating personnel quickly removes mould casting.

It is opposite to be formed therebetween for front cavity 8 and rear cavity 10 can be enable to carry out accurate mould assembling action The casting forming cavity of closing, positioning protrusion 21 is provided with the edge of the die joint of rear cavity 10, correspondingly, in front cavity 8 The edge of die joint offer for the chimeric positioning groove 22 of the contraposition of positioning protrusion 21.

The die casting of the present embodiment in specific application, can use following process processing step to carry out the pressure of module bottom case Type casting moulding, i.e.,：

Die casting controls process：Mould is combined and is fixed according to certain rule and position and is such as pressed After in the equipment of casting machine, control preceding mould assembly a and rear mould assembly b is relatively closed (i.e.：Carry out the molding control of mould) with two Relative closure is formed between person is cast into cavity, charging runner and discharge sprue d.

Die cast process：Under the effect of high pressure that high pressure major ingredient equipment is provided by feeding-passage and charging runner to The die casting raw material (such as molten metal) of die cast intracavitary filling liquid or semi liquid state and under pressure (i.e.：Preceding mould assembly a Under the action of molding compression being carried out with rear mould assembly b) making die casting raw material coagulation forming, (its concrete structure is referring to figure for bottom case casting 8 and Fig. 9 and Fig. 2).In the practical implementation of actual process, the technological parameter of die cast process is preferably：1st, mould Temperature control so can effectively improve the stability of casting flatness at 250 DEG C -280 DEG C；2nd, mold clamping force control exists 1800KN-2500KN, so can effectively ensure that product thickness, direction, size etc.；3rd, the high injection material such as injection molding machine is set Standby firing rate is controlled in 5-8m/s, can so be reduced the deflection of product and be improved the stability of its flatness.

CNC manufacturing procedures：Control preceding mould assembly a and rear mould assembly b are opposite to be opened (i.e.：Carry out the die sinking control of mould), The appearance profile edge of bottom case casting is processed finishing with CNC, to ensure the accuracy of casting appearance profile.

Go die casting burr process：Bottom case casting is jacked up using the grade of thimble 17 accessory to take out the casting of the bottom case of coagulation forming Part, then removes the burr at hole position burr and the thimble mark on bottom case cast(ing) surface, to prevent casting in an assembling process Scratch is caused to miscellaneous part or is scratched.

Epithelium process：Bottom case casting (it can be found in Figure 10 and Figure 11 and Fig. 2) after finishing is carried out at alramenting Reason, to improve the corrosion resistance of bottom case casting, inoxidizability and surface adhesion force；

Dust process：Bottom case casting by surface granosealing dust processing (such as plating, aoxidize, electrophoresis or Oil spout etc. technique).

Thus, the design feature of the mould based on the present embodiment, in the die cast step of module bottom case, traditional handicraft Needed because of the defects of using present in mould by twice burring process, and utilize work used by the mould of the present embodiment Sequence need to only go die casting burr technique together；At the same time, it is possible to reduce product materials, it is numerous and diverse to need not move through later stage CNC processing etc. The bad loss of product can be greatly reduced in process, so as to save the material cost of product, cost of labor and transport Cost, the shape of product is unaffected, also ensure that the stability of product plane degree and the accuracy of thickness；In addition, it is based on mould The design feature of tool itself can effectively ensure mould casting (i.e.：Semi-finished product) the stability of flatness and the accuracy of thickness； Based on this, processing step can be shorten to 6 present procedures by 10 traditional procedures, greatly saved time of product into This simultaneously improves production efficiency.

The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention, Every equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly transported Used in other related technical areas, it is equally included in the patent within the scope of the utility model.

Claims (8)

1. a kind of die-casting forming die of LED display module bottom case, the preceding mould that it is included each other in stacked distribution up and down is total Into with rear mould assembly, it is characterised in that：After die casting shaping area, one are located at after offering one on the die joint of mould assembly after described The front side of die casting shaping area and the charging runner being connected with rear die casting shaping area and several be located at rear die casting into The rear side in type area and the discharge sprue being connected with rear die casting shaping area, the charging runner include a plane projected shape In the "T"-shaped charging sprue of class and several mutual horizontal streams being distributed in parallel arranged and sprue will be fed respectively The charging secondary flow road that Dao Qu is connected with rear die casting shaping area, the charging sprue and charging secondary flow road are in same plane It is interior；The preceding mold forming area of a position opposite with rear die casting shaping area, the preceding mould are offered on the die joint of the preceding mould assembly Between shaping area and rear die casting shaping area cavity is cast into formed with one；Set on the preceding mould assembly and/or on rear mould assembly It is equipped with a feeding-passage being connected with charging sprue.

A kind of 2. die-casting forming die of LED display module bottom case as claimed in claim 1, it is characterised in that：After described Several discharge secondary flow roads, institute are also offered respectively on the die joint of mould assembly and positioned at the left and right sides of rear die casting shaping area Discharge secondary flow road is stated with rear die casting shaping area to be connected.

A kind of 3. die-casting forming die of LED display module bottom case as claimed in claim 1, it is characterised in that：It is described into Hanging down between the extended line on the left and right side edge of central point and rear die casting shaping area of the material passage on the die joint of rear mould assembly Straight distance is 120mm-150mm.

4. a kind of die-casting forming die of LED display module bottom case as claimed any one in claims 1 to 3, its feature It is：Deslagging grate flow channel area is further opened with after described on the die joint of mould assembly and on rear side of discharge sprue, it is described Deslagging grate flow channel area includes at least two and is arranged in the rear mold deslagging teeth groove of left and right parallel arranged, adjacent two rear mold rows Isolate arm formed with a rear mold between slag teeth groove row, being provided with contraposition on the die joint of the preceding mould assembly is embedded in rear mold deslagging Preceding mould deslagging double wedge in teeth groove row is arranged, and isolates arm with rear mold formed with one between adjacent two preceding mould deslagging double wedges rows Isolate preceding mould isolation channel of the arm in stacked distribution up and down, the rear mold deslagging teeth groove row and discharge sprue with respect to position and with rear mold It is connected.

A kind of 5. die-casting forming die of LED display module bottom case as claimed in claim 4, it is characterised in that：Each institute Rear mold deslagging teeth groove row is stated to be composed in the front and rear deslagging teeth groove being distributed side by side each other by several.

A kind of 6. die-casting forming die of LED display module bottom case as claimed in claim 4, it is characterised in that：Before described Mould assembly includes offering the preceding mould bases of die cavity and a front cavity in preceding die cavity before one on a die joint, before described Mold forming area is opened on the die joint of front cavity, and the preceding mould isolation channel and preceding mould deslagging double wedge row may be contained within preceding mould bases On die joint；

Mould assembly includes a die joint and offers the rear mould bases of die cavity after one and a rear mold for being flush-mounted in rear mold intracavitary after described Benevolence, rear die casting shaping area, charging runner and the discharge sprue are opened on the die joint of rear cavity, the deslagging row Flow channel area is arranged on the die joint of rear mould bases；

The feeding-passage includes the barrel being arranged at along the vertical direction in preceding mould bases and is arranged at rear mould bases along the vertical direction Interior spreader, the spreader sleeve are connected in barrel and by charging sprue with barrel.

A kind of 7. die-casting forming die of LED display module bottom case as claimed in claim 6, it is characterised in that：After described Mould assembly further includes the lower section for being arranged at rear mould bases and surrounds the support block of the edge distribution of rear mould bases, is installed in the following table of rear mould bases The support column of face central area, the Ejector Retainer Plate being set on support column and thimble panel and bottom are installed on thimble panel And top is equiped with one on the Ejector Retainer Plate and passes through sequentially through the thimble of rear mould bases, rear die cavity and rear cavity distribution Thimble panel drives the thimble driver that thimble moves up and down relative to Ejector Retainer Plate.

A kind of 8. die-casting forming die of LED display module bottom case as claimed in claim 6, it is characterised in that：After described The edge of the die joint of mode is provided with positioning protrusion, and the edge of the die joint of the front cavity is offered for positioning protrusion The chimeric positioning groove of contraposition.