CN115722650A - Die casting die of heavy load connector epitheca - Google Patents

Abstract

The invention relates to a die-casting die for an upper shell of a heavy-duty connector, which comprises an upper die set, a lower die set, a die core and a core-pulling block, wherein the die core consists of two die cores which are buckled with each other, and the two die cores are provided with forming grooves and are respectively embedded in the upper die set and the lower die set; the two molding grooves are buckled with each other to form a cavity; the core-pulling block is inserted into the cavity, and the outer surface of the core-pulling block and the inner wall of the cavity enclose to form a forming cavity of the upper shell of the heavy-duty connector; the molding cavity is provided with a butt end molding surface which consists of a mold core molding surface and a core-pulling block molding surface which are adjacent; the core-pulling block forming surface is a plane, and the mold core forming surface is arranged towards the inside of the forming cavity in a protruding mode. According to the invention, the mold core molding surface and the core-pulling block molding surface form the molding surface of the end surface of the butt end of the heavy-duty connector, and when the upper mold set and the lower mold set are opened, the mold core molding surface and the core-pulling block molding surface are separated, so that a required plane can be formed by one-time die casting, and the technical problem in the prior art is solved.

Description

Die casting die of heavy load connector epitheca

Technical Field

The invention relates to the field of manufacturing of heavy-duty connectors, in particular to a die-casting die for manufacturing an upper shell of a heavy-duty connector, wherein the upper shell of the heavy-duty connector can be formed into a sealing plane through one-step die casting.

Background

The heavy-load connector is also called HDC heavy-load connector and aviation plug, and is widely applied to equipment needing electrical and signal connection, such as construction machinery, textile machinery, packaging and printing machinery, tobacco machinery, robots, rail transit, hot runners, electric power, automation and the like.

The high protection levels (IP 65, IP 68) that the heavy-duty connector needs to provide are not comparable to the advantages of the equipment connection system in a harsh environment. The protective film can provide effective protection under severe environments such as sand, rain, cold, ice, snow, oil stain and the like. Therefore, the shell of the heavy-duty connector needs to meet the requirement of high protection level through a sealing structure, wherein the shell of the heavy-duty connector is composed of an upper shell and a lower shell which are buckled with each other, the end face of one end, facing the lower shell, of the upper shell is a plane, and the plane needs to be pressed on a sealing ring of the lower shell. The technical feature provided by the above-mentioned requirement for a high protection level of the transfer connector is the plane of the upper shell against the sealing ring, which must be ensured to be flat.

The manufacturing of above-mentioned heavy load connector epitheca generally chooses the die-casting shaping for use, die casting die to die casting die's die joint optimization is in above-mentioned planar middle part in the die casting die design of current heavy load connector epitheca, it is two parts about the epitheca is divided into also namely at die-casting in-process, these two parts are respectively through last, the die cavity of lower mold core carries out the shaping operation, therefore, can't reach the sealed of product by the corresponding face of part epitheca, requirements such as waterproof, and then after die-casting shaping, need carry out the manual plane of carrying on the terminal surface and polish, because of polishing for manual work, the unable equilibrium of guaranteeing the dynamics of polishing of process of polishing, it is big to lead to plane roughness error, directly influence the leakproofness of heavy load connector, waterproof nature, thereby can't reach and predetermine protection level standard.

Therefore, how to solve the problem that the plane of the upper shell cannot be formed at one time in the prior art is one of the important technical problems to be solved by the technical personnel in the field.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention aims to provide a die-casting die for manufacturing an upper shell of a heavy-duty connector, wherein the upper shell of the heavy-duty connector can be formed with a sealing plane by one-step die-casting.

In order to realize the purpose, the invention adopts the following technical scheme:

the utility model provides a die casting die of heavy load connector epitheca, its includes module, lower module, mould benevolence and core pulling block, wherein:

the mold core consists of two mold cores which are buckled with each other, and the two mold cores are both provided with forming grooves and are respectively embedded in the upper mold group and the lower mold group;

the two forming grooves are buckled with each other to form a cavity, the core-pulling block is inserted into the cavity, and the outer surface of the core-pulling block and the inner wall of the cavity are enclosed to form a forming cavity of the upper shell of the heavy-duty connector;

the molding cavity is provided with an abutting end molding surface, and the abutting end molding surface consists of a mold core molding surface and a core-pulling block molding surface which are adjacent;

the core-pulling block forming surface is a plane, and the mold core forming surface is arranged towards the inside of the forming cavity in a protruding mode.

Further preferred is: the butt joint end forming surface is used for forming a butt joint end of the heavy-duty connector upper shell, and the butt joint end of the heavy-duty connector upper shell is the end of the heavy-duty connector upper shell, which abuts against the heavy-duty connector lower shell.

Further preferred is: the molding surface of the mold core is a curved surface and is bent towards the mold core by the core-pulling block.

Further preferred is: the molding surface of the core pulling block is a plane with the flatness of 0.1 mm.

Further preferably: the core-pulling block is driven by the core-pulling seat to perform core-pulling displacement;

the core pulling seat is assembled in the lower die set and driven by the parallel driving piece.

Further preferred is: the core-pulling block is provided with a core-pulling bulge, and the core-pulling bulge is inserted into the cavity.

Further preferably: the week side of one-tenth die cavity sets up supplementary chamber, supplementary chamber and one-tenth die cavity intercommunication.

Further preferably: the auxiliary cavity consists of two auxiliary grooves which are buckled with each other, and any auxiliary groove is communicated with the forming cavity;

the auxiliary groove communicated with the molding cavity is communicated with the atmosphere through an exhaust groove.

Further preferably: the upper die set comprises an upper die plate, wherein a pouring gate is assembled on the upper die plate, and the pouring gate is close to the edge of the upper die plate.

Further preferred is: the lower module includes ejection mechanism, ejection mechanism includes fore-set, fore-set panel and ejecting bottom plate, wherein:

the ejection panel is arranged on the top column bottom plate;

one end of the top column is clamped and fixed on the top column panel, and the other end of the top column is located below the forming cavity and is pushed by the top column bottom plate to perform ejection operation.

Compared with the background art, the invention has the following advantages by adopting the technical scheme:

according to the die core forming surface and the core-pulling block forming surface, the forming surface of the end surface of the butt end of the heavy-duty connector is formed by the die core forming surface and the core-pulling block forming surface, the core-pulling block forming surface is a plane, when the upper die set and the lower die set are opened, the die core forming surface and the core-pulling block forming surface are separated, the required plane of the end surface of the upper shell can be formed in a one-time die-casting mode, secondary polishing is avoided, and the technical problems in the prior art are solved.

Drawings

FIG. 1 is a first schematic perspective view of a die-casting mold for an upper shell of a heavy-duty connector according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a die-casting mold for an upper shell of the heavy-duty connector according to an embodiment of the present invention;

FIG. 3 is a sectional view of the die-casting mold for the upper shell of the heavy-duty connector according to the embodiment of the present invention;

FIG. 4 is a sectional view of the die-casting mold for the upper shell of the heavy-duty connector according to the embodiment of the present invention;

FIG. 5 is a sectional view of the die-casting mold for the upper shell of the heavy-duty connector in accordance with the embodiment of the present invention;

FIG. 6 is an exploded view of a die casting mold for the upper shell of the heavy duty connector according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of the upper core according to the embodiment of the present invention;

fig. 8 is a schematic structural view of the lower mold core in the embodiment of the present invention.

The reference numerals of the above description refer to the following:

A. an upper shell;

10. a guide port; 11. a guide opening groove; 20. an auxiliary chamber; 21. an auxiliary groove; 22. an exhaust duct;

100. mounting a template; 110. a gate mounting hole; 120. a guide post;

200. a lower module; 210. a lower template; 220. a supporting block; 230. an ejection mechanism; 231. a top post bottom plate; 232. a top pillar panel; 233. a top pillar;

300. a gate; 310. an upper sprue pipe; 311. an upper sprue pipe body; 312. fixing a sleeve; 320. a lower guide body;

410. an upper mold core; 420. a lower mold core; 401. forming a groove; 402. a mold core molding surface;

510. core extraction; 520. forming a base; 530. an oblique column; 501. forming surfaces of the core pulling blocks;

610. a guide plate; 620. a guide bar; 630. a spring;

700. ejecting the conductor;

800. an insert;

900. and (7) inserting a pin.

Detailed Description

The mould for manufacturing the upper shell of the existing heavy-duty connector has the problems that a parting surface is in the middle of the upper shell or any part, so that the end surface cannot be formed into a plane at one time, and the requirement of protection grade cannot be met due to the fact that secondary manual polishing processing is needed.

Aiming at the technical problems, through the analysis of reasons, the inventor continuously researches and discovers a die-casting die for an upper shell of a heavy-duty connector, a parting surface is arranged on the end surface of the upper shell, a die core forming surface and a core-pulling block forming surface form a forming surface of the end surface of the butt end of the heavy-duty connector, the core-pulling block forming surface is a plane, and when an upper die set and a lower die set are opened, the die core forming surface is separated from the core-pulling block forming surface, so that the required plane of the end surface of the upper shell can be formed by one-time die-casting, secondary polishing is avoided, and the technical problems in the prior art are solved; in addition, compared with the prior art, the protection grade of the upper shell is improved, meanwhile, the processing cost can be reduced, and the processing efficiency is improved.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.

Examples

The die-casting mold of the heavy-duty connector upper shell is explained in detail with reference to the structures shown in fig. 1 to 8 as follows:

a die-casting die for an upper shell of a heavy-load connector comprises an upper template 100, a lower module 200 and a die core, wherein the die core comprises an upper die core 410 and a lower die core 420 which are mutually buckled, and the upper die core 410 and the lower die core 420 are respectively embedded in the upper template 100 and the lower module 200.

Go up all set up shaping groove 401 on mold core 410 and the lower mold core 420, two the mutual lock in shaping groove has constituted a cavity, and a core pulling piece 510 inserts in the cavity, the shaping chamber of synthetic heavy load connector upper shell is enclosed with the internal surface of cavity to the surface of this core pulling piece 510.

An installation groove is formed in one side of the upper mold plate 100 facing the lower mold block 200, and the upper mold core 410 is embedded into the installation groove and fastened by screws. The upper template 100 is provided with a gate 300, the template is provided with a gate mounting hole 110, the gate mounting hole 110 is arranged close to one side edge of the upper template 100, and the gate mounting hole 110 is a T-shaped hole and is used for embedding the gate 300; specifically, the method comprises the following steps: the large diameter end of the gate mounting hole 110 is located on the top surface of the upper mold plate 100, and the top surface of the upper mold plate 100 is an end surface of the upper mold plate 100 far away from the lower mold set 200.

The upper die plate 100 is a rectangular plate, the gate mounting hole 110 is arranged near the long edge of one side of the upper die plate 100, through holes are formed in four corners of the upper die plate 100, guide posts 120 are assembled in the through holes, and the guide posts 120 are matched and spliced with guide sleeves in the lower die set 200, so that the guiding effect of die opening or die closing between the upper die plate 100 and the lower die set 200 is realized. Specifically, the method comprises the following steps: the guide post 120 is a cylinder, and a convex edge is formed at the top end, i.e. the end far away from the lower module 200, and the guide post 120 is embedded in the through hole, i.e.: the upper mold plate 100 is fixedly connected with the guide post 120, so that guiding is performed in the mold opening or closing process.

The lower die set 200 includes a lower die plate 210, an ejection mechanism 230, and a support block 220. The number of the supporting blocks 220 is two, the two supporting blocks 220 are symmetrically distributed, each supporting block 220 is provided with a convex edge towards the other supporting block 220, a supporting platform is formed between the convex edges of the two supporting blocks 220, and the ejection mechanism 230 is positioned on the supporting platform; the lower die plate 210 is fixed on the supporting block 220.

The ejection mechanism 230 includes a top pillar 233, a top pillar panel 232, and a top pillar bottom plate 231, the top pillar panel 232 is stacked on the top pillar bottom plate 231, the top pillar 233 is an inverted T-shaped pillar, and a large-diameter end thereof is embedded on the top pillar panel 232 and abuts against the top pillar bottom plate 231; the ejection end of the top pillar 233 passes through the lower mold plate 210 and the lower mold core 420 and extends into the molding cavity, the top pillar 233 is driven by a top pillar panel and a top pillar bottom plate to eject toward the molding cavity, the number of the top pillars 233 is multiple, and the top pillars 233 are all assembled on the top pillar panel. Preferably: the ejection mechanism 230 further includes an ejection guide post ejection conductor 700, the ejection guide post ejection conductor 700 is locked on the lower die plate 210 by bolts and is located between the two support blocks 220, the ejection guide post ejection conductor 700 is a circular main body, guide holes are respectively formed in the top post panel 232 and the top post bottom plate 231, the guide holes are round holes and are matched with the ejection guide post ejection conductor 700, the guide holes on the top post panel 232 and the top post bottom plate are coaxially distributed and stacked to form a guide channel, the ejection guide post ejection conductor 700 is inserted into the guide channel, and guiding in the ejection process is realized.

A groove is formed in one side, facing the upper template 100, of the lower template 210, a lower mold core 420 is embedded in the groove, and the lower mold core 420 is locked in the groove by screws; the lower template 210 is a rectangular plate, through holes are formed in four corners of the lower template, guide sleeves are assembled in the through holes, and the guide sleeves and the guide pillars 120 are coaxially distributed and are matched with the guide pillars 120 to realize the guiding in the clamping or die assembly process.

The gate 300 includes an upper gate tube 310 and a lower guide 320, the upper gate tube 310 is fitted into the gate mounting hole 110 of the upper mold plate 100, the lower guide 320 is fitted into a fitting hole formed in the lower mold plate 210, and a tip end of the lower guide 320 (i.e., an end of the lower guide 320 facing the upper mold plate 100) is inserted into the upper gate tube 310. The upper sprue pipe 310 comprises an upper sprue pipe 310 body and a fixing sleeve 312, the fixing sleeve 312 is embedded into the inner wall of the sprue mounting hole 110, the upper sprue pipe 310 body is assembled in the fixing sleeve 312, two annular grooves are formed in the outer diameter of the upper sprue pipe 310 and distributed up and down, and each annular groove is communicated with an air outlet hole formed in the upper template 100, specifically: the fixing sleeve 312 is provided with an air guide hole, the upper template 100 corresponding to the air guide hole is provided with an air outlet hole, and the annular groove is communicated with the outside air through the air guide hole and the air outlet hole.

The lower guide body 320 is provided with a guide opening 10 towards the liquid injection flow channel, and the liquid injection flow channel is communicated with the forming cavity. Specifically, the method comprises the following steps: the upper mold core 410 and the lower mold core 420 are both provided with molding grooves 401, the two molding grooves 401 are mutually involutory and communicated to form a cavity for molding, the guide port 10 is communicated with a two-way by two guide port grooves 11 which are mutually buckled, the two guide port grooves 11 are respectively arranged on the upper mold core 410 and the lower mold core 420, and each guide port groove 11 is communicated with the molding groove 401 on the same mold core.

Leading mouth 10 is the backflow channel of leading body 320 and shaping chamber under the intercommunication, and this leading mouth 10 is close to the one end of shaping chamber is the splayed, and big footpath end and shaping chamber intercommunication for the abundant annotates the molten metal with the shaping chamber, thereby the molten metal can fill up the shaping chamber.

The week side of die cavity sets up supplementary chamber 20, supplementary chamber 20 and die cavity intercommunication for accomodate the molten metal that overflows and remember the effective exhaust, supplementary chamber 20 has the supplementary groove 21 intercommunication of two mutual locks to form, two supplementary groove 21 is seted up respectively on last mold core 410 and lower mold core 420. Specifically, the method comprises the following steps: the auxiliary groove 21 formed in the lower core 420 is communicated with the molding cavity, and the auxiliary groove 21 formed in the upper core 410 is not communicated with the molding groove 401. It should be noted that: the auxiliary groove is further communicated with an exhaust hole on the corresponding mold core, in this embodiment, the auxiliary groove 21 is formed in the upper mold core 410 and the lower mold core 420, wherein the auxiliary groove 21 of the lower mold core 420 is communicated with the forming groove 401, the auxiliary groove 21 of the lower mold core 420 is communicated with an exhaust groove formed in the lower mold core, the exhaust groove is an L-shaped flat groove, and the exhaust groove is inclined with the bottom of one end groove communicated with the auxiliary groove, that is to say: the one end of air discharge duct is the link, and this link is the one end with the auxiliary tank intercommunication, because of the groove depth of air discharge duct is less than far away the groove depth of auxiliary tank, the tank bottom of this link is the slope form for the tank bottom of intercommunication air discharge duct and the tank bottom of auxiliary tank.

In order to realize ejection and demolding of the molded upper shell A, an ejection column 233 is arranged below the auxiliary groove 21 of the lower mold core 420 for ejecting excess materials, so that the molding cavity can be filled with molten metal and effectively exhausted, the excess materials can be ejected, and the cleaning of the auxiliary cavity 20 is ensured.

The insert 800 and the insert needle 900 are assembled in the upper mold core 410, the insert needle 900 assembling hole and the insert 800 assembling hole are formed in the upper mold core 410, the insert 800 and the insert needle 900 are respectively assembled in the insert needle 900 assembling hole and the insert needle 800 assembling hole, so that the adjustment and the use are carried out in the forming process of the upper shell A, and the specific adjustment method is that only the insert 800 and the insert needle 900 at the corresponding positions need to be replaced, so that the processing cost is reduced. Similarly, the insert 800 and the insert pin 900 are assembled in the lower core 420, the insert pin 900 assembly holes and the insert 800 assembly holes are formed in the lower core 420, and the insert 800 and the insert pin 900 are respectively assembled in the insert pin 900 assembly holes and the insert 800 assembly holes, so that adjustment and use are performed in the upper shell a forming process, and a specific adjustment method is that only the insert 800 and the insert pin 900 at corresponding positions need to be replaced, so that the processing cost is reduced.

The forming cavity formed by the upper mold core, the lower mold core and the core-pulling block is matched with the required upper shell A. Specifically, the method comprises the following steps: the core block 510 has an insertion projection inserted into the cavity with a gap between an outer surface of the insertion projection and an inner wall of the cavity, thereby constituting a molding cavity for molding the upper case a.

It should be noted that: the forming cavity is provided with a butt end forming surface, the butt end forming surface is used for forming a butt end of the heavy-load connector upper shell, and the butt end of the heavy-load connector upper shell is one end of the heavy-load connector upper shell, which is abutted against the heavy-load connector lower shell. The butt end forming surface is composed of adjacent core forming surface 402 and core-pulling block forming surface 501, and is in a step shape, and the core-pulling block forming surface 501 is farther away from the forming cavity than the core forming surface 402, that is to say: the mold core forming surface 402 is arranged in the forming cavity more towards the forming cavity than the core-pulling block forming surface 501, and then the end surface of the corresponding abutting end of the upper shell A after die-casting forming is in a step shape.

It should be noted that: the forming surface 501 of the core-pulling block is a plane, the flatness requirement of the forming surface is 0.1mm, and then a convex plane is obtained on the upper shell A.

When the upper mold core 410 is driven by the upper mold plate 100 to be separated from the lower mold block 200, that is: the mold core molding surface 402 is separated from the core-pulling block molding surface 501, namely: the die joint of this mould is between last mold core 410 and the piece 510 of loosing core, on the prerequisite that does not influence epitheca A die-casting machine-shaping, can also ensure that epitheca A can the required plane of one shot forming processing, and ensure this planar roughness, when reaching epitheca A and can realizing sealed and waterproof purpose, avoid the use that needs the process of polishing in addition among the prior art, then reduce the processing cost, improve machining efficiency.

The mold core forming surface 402 comprises an upper mold core forming surface and a lower mold core forming surface which are annular after being buckled in an aligning manner. Go up mold core shaping surface or lower mould shaping surface and be the side of shaping groove 401, this shaping groove 401's side is the side of the piece 510 direction of inserting of loosing core, and this side can be plane or arcwall face, in this embodiment: the upper mold core molding surface or the lower mold molding surface is an arc-shaped surface and is formed by bending the core pulling block 510 towards the upper mold core 410 and the lower mold core 420 respectively.

The core-pulling block 510 is in a convex shape and comprises an integrally connected core-pulling block 510 body and an insertion protrusion, the insertion protrusion is located on the end face of the core-pulling block 510 body, the middle of the end face of the core-pulling block 510 body is covered by the insertion protrusion, and an annular side face remains, wherein the annular side face is the core-pulling block forming face 501. It should be noted that: the core piece forming surface 501 is located further away from the forming cavity relative to the core forming surface, that is: the mold core molding surface is arranged closer to the molding cavity than the core pulling block molding surface 501, so that a stepped or Z-shaped stepped molding surface is obtained.

The core pulling mechanism is further included and comprises a core pulling seat and the core pulling block 510. The core-pulling block 510 is connected and linked with the core-pulling seat, and the core-pulling seat is driven by a driving part to perform core-pulling operation. The core-pulling seat is provided with a groove, the assembly end of the core-pulling block 510 is inserted into the groove and locked by a screw, and the core-pulling seat is provided with an inclined hole which is obliquely arranged from the upper template 100 to the lower template 210 in the direction away from the forming cavity. An inclined column 530 penetrates into the inclined hole of the core pulling seat from the upper template 100 to assist core pulling.

In order to ensure the steady and accurate the going on of the motion of loosing core of core-pulling piece 510 and core-pulling seat, the outside of core-pulling seat sets up deflector 610, deflector 610 is the U font, and its open end orientation sets up to lower module 200 direction, and fixes the side of lower bolster 210, wear to establish guide bar 620 on the deflector 610, guide bar 620 passes deflector 610 is connected with the seat of loosing core to the direction of loosing core, spring 630 is established to the cover on guide bar 620, guide bar 620 is connected with the driving piece, the driving piece generally is the hydro-cylinder for provide enough, last its stable power of loosing core, realize then that effective and efficient looses core the operation.

It should be noted that: in order to perform abdication on the displacement of the inclined rod, U-shaped abdication grooves are formed on the top pillar panel 232 and the top pillar bottom plate 231.

The die-casting die for the heavy-load connector upper shell A comprises the following processing steps:

the method comprises the following steps: injecting molten metal after hot melting into the mold from the gate 300, and then paying attention to the molding cavity;

step two: filling metal liquid into the forming cavity for forming;

step three: after molding, the upper mold plate 100 drives the upper mold core 410 to move away from the lower mold base, so as to realize mold opening;

step four: after the mold opening is finished, the top column bottom plate 231 drives the top column panel 232 and the top column 233 to eject the formed upper shell A, and the product demolding is finished;

step four: and (5) demoulding the upper shell A, and cutting off redundant material bodies to obtain the upper shell A of the heavy-duty connector.

It should be noted that: in the mold opening process in the second step, the mold core molding surface 402 is separated from the core pulling block molding surface 501, which is equivalent to: the die joint of this mould is between last mold core 410 and the piece 510 of loosing core, on the prerequisite that does not influence epitheca A die-casting machine-shaping, can also ensure that epitheca A can the required plane of one shot forming processing, and ensure this planar roughness, when reaching epitheca A and can realizing sealed and waterproof purpose, avoid the use that needs the process of polishing in addition among the prior art, then reduce the processing cost, improve machining efficiency.

It should be noted that: in this embodiment, the number of the molding cavities is two, two the molding cavities are arranged in parallel, and the same gate 300 is used for injecting molten metal, so that the high-efficiency processing of two cavities in one mold is realized.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. Die casting die of heavy load connector epitheca, its characterized in that: it includes module, lower module, mould benevolence and core extraction piece, wherein:

the mold core consists of two mold cores which are buckled with each other, and the two mold cores are both provided with forming grooves and are respectively embedded in the upper mold group and the lower mold group;

the two molding grooves are buckled with each other to form a cavity; the core pulling block is inserted into the cavity, and the outer surface of the core pulling block and the inner wall of the cavity are enclosed to form a forming cavity of the heavy-duty connector upper shell;

the molding cavity is provided with a butt end molding surface which consists of a mold core molding surface and a core-pulling block molding surface which are adjacent;

the core-pulling block forming surface is a plane, and the mold core forming surface is arranged towards the inside of the forming cavity in a protruding mode.

2. The die casting mold for an upper shell of a heavy duty connector of claim 1, wherein: the butt joint end forming surface is used for forming a butt joint end of the heavy-load connector upper shell, and the butt joint end of the heavy-load connector upper shell is one end, abutted against the heavy-load connector lower shell, of the butt joint end.

3. The die casting mold for an upper shell of a heavy duty connector as recited in claim 1 or 2, wherein: the molding surface of the mold core is a curved surface and is bent towards the mold core by the core-pulling block.

4. The die casting mold for an upper shell of a heavy duty connector of claim 1, wherein: the molding surface of the core pulling block is a plane with the flatness of 0.1 mm.

5. The die casting mold for the upper shell of the heavy-duty connector as recited in claim 1, wherein: the core-pulling block is driven by the core-pulling seat to perform core-pulling displacement;

the core pulling seat is assembled in the lower die set and driven by the parallel driving piece.

6. The die casting mold for an upper shell of a heavy duty connector as recited in claim 1 or 4, wherein: the core-pulling block is provided with a core-pulling bulge, and the core-pulling bulge is inserted into the cavity.

7. The die casting mold for an upper shell of a heavy duty connector of claim 1, wherein: the periphery of the molding cavity is provided with an auxiliary cavity, and the auxiliary cavity is communicated with the molding cavity.

8. The die casting mold for an upper shell of a heavy-duty connector as recited in claim 6, wherein: the auxiliary cavity consists of two auxiliary grooves which are buckled with each other, and any auxiliary groove is communicated with the forming cavity;

the auxiliary groove communicated with the forming cavity is communicated with the atmosphere through an exhaust groove.

9. The die casting mold for the upper shell of the heavy-duty connector as recited in claim 1, wherein: the upper die set comprises an upper die plate, wherein a pouring gate is assembled on the upper die plate, and the pouring gate is close to the edge of the upper die plate.

10. The die casting mold for an upper shell of a heavy duty connector of claim 1, wherein: the lower module includes ejection mechanism, ejection mechanism includes fore-set, fore-set panel and ejecting bottom plate, wherein:

the ejection panel is arranged on the top column bottom plate;

one end of the top column is fixedly clamped on the top column panel, and the other end of the top column is positioned below the forming cavity and is pushed by the top column bottom plate to perform ejection operation.

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