CN210590286U - One-out-four-mold structure of 32AH storage battery shell hot runner - Google Patents

Abstract

The utility model provides a 32AH battery shell hot runner one-out-four mould structure, the mould structure is through carrying out the symmetry setting to sprue, runner and subchannel in the reposition of redundant personnel, cooperate the central symmetry setting of annotating the material mouth at the battery shell, make the flow, the velocity of flow and the material injection pressure of the raw materials of feeding mouth reposition of redundant personnel to each material injection mouth all unanimous, average, guarantee as far as possible that the son both sides receive raw materials injection pressure balance, and then avoid the son to take place the slope too big because of the atress inequality as far as possible; in the molding process, through the arrangement of the main runner, the branch runners and the sub-runners in the step of die assembly and injection molding, the injection nozzles symmetrically arranged along the center point of the die cavity are matched, and raw materials are injected into the die cavity after die assembly at the injection nozzles, so that the pressure of the raw materials injected by the injection nozzles is kept balanced as much as possible on the two sides of the insert, and the insert is prevented from being inclined and deviated as much as possible.

Description

One-out-four-mold structure of 32AH storage battery shell hot runner

Technical Field

The utility model relates to a battery shell injection moulding processing technology field specifically is four mould structures of 32AH battery shell hot runner one play.

Background

The plastic mold of the existing storage battery shell injection molding is a cold runner injection mold, the cold runner injection mold is about to enter a mold cavity by plastic in a melting state through a sprue bush, a runner and a sprue, no heating element is arranged in the runner, and the cold runner plastic mold has the following technical problems in the process of molding the storage battery shell:

1. after the cold material channel mold is opened, waste material water gap materials are formed at the sprue bush, the runner and the sprue part;

2: the molding cycle is long, the pressure loss is large, and the production efficiency is low;

3. the surface smoothness of the formed product is low, and the wall thickness is not uniform;

4. the mechanical property is lower.

The chinese utility model application number 201810521774.7 discloses a battery jar and battery cover hot runner plastic mould, including the mould main part, the inside of mould main part is equipped with heating system, and heating system installs in the mould main part, is equipped with movable interface in the mould main part, and movable interface passes through screw and mould main part fixed connection. This kind of battery jar and battery cover hot runner plastic mould application be hot runner plastic mould, be equipped with the temperature control case, and the temperature control case possesses high temperature alarming function and automatically regulated function, through the effectual temperature of adjusting among the integral hot runner system of temperature control case, thereby make the solution temperature variation control in the precision range of requirement, can make the inside remaining raw materials of mould can not cool off, avoid carrying out the breakage through crushing apparatus once more, make the production site can not produce the dust, do not have occupational injury to the staff, do not have environmental pollution, thereby reach the environmental protection effect.

Although the above patent realizes the hot runner injection molding of the accumulator shell, it has the following technical problems:

1. the influence of the pressure of the arrangement and distribution of the material injection nozzles in the feeding process on the forming quality of the storage battery shell in the injection molding processing process is not considered, and the mechanical property of the formed storage battery shell is reduced;

2. in the process of forming and injecting the storage battery shell, the raw material injection pressure is high, and after long-term work, the cavity is easy to break;

3. after the storage battery shell is formed, in the demolding process, the ejector rod directly ejects out the storage battery shell, so that concave blocks appear on the storage battery shell, and the surface finish degree is influenced.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides a four mould structures of 32AH battery shell hot runner one play, it is through the sprue to the reposition of redundant personnel in the stream board, the sprue carries out the symmetry with the subchannel and sets up, the central symmetry setting at the battery shell is annotated in the cooperation, make the flow of the raw materials of feed nozzle reposition of redundant personnel to every notes material mouth, the velocity of flow is unanimous with notes material pressure, it is average, guarantee as far as possible that income son both sides receive raw materials injection pressure balance, and then the volume of slope that avoids the income son to take place to incline because of the atress inequality as far as possible is too big, the technical problem of the injection mouth raw materials injection flow volume and the pressure that have solved current hot runner plastic mould produce the influence to the product quality.

In order to achieve the above object, the utility model provides a following technical scheme:

a four mould structure of 32AH battery shell hot runner one-out includes:

the upper die assembly sequentially comprises a heat insulation plate, an upper die fixing plate, a hot runner plate, an upper die cover plate and an upper die plate which are connected in an overlapped mode from top to bottom in the vertical direction, a plurality of chambers which are arranged at equal intervals and used for injection molding of the storage battery shell are arranged on the upper die plate, a cooling runner which is arranged around the chambers and used for cooling the storage battery shell is formed in the chambers, a hot runner group which is communicated with the chambers and used for injecting thermoplastic resin into the chambers is arranged in the upper die assembly, the hot runner group comprises a feeding nozzle used for feeding, a splitter plate connected with the feeding nozzle, and four groups of material injection nozzle groups which are arranged at equal intervals and are in central symmetry along the central point of the splitter plate and are in one-to-one correspondence with the chambers, the feeding nozzles are arranged on the central point of the end face of the other side of the splitter plate relative to the material injection nozzle groups, and the splitter plates are, a main runner positioned at the upper part, branch runners positioned at the lower part and branch runners are respectively arranged in the material injection nozzle group, the middle point of the main runner is communicated with the material injection nozzle, the two ends of the main runner are communicated with the middle points of the corresponding branch runners, the two ends of each branch runner are connected with the middle points of the corresponding branch runners, and the two ends of each branch runner are connected with the material injection nozzles positioned in the material injection nozzle group in the same group; and

the lower mould assembly, the lower mould assembly includes mutual superimposed push pedal, lower bolster and lower mould fixed plate from last to down in proper order along vertical direction, the push pedal promotes the setting along vertical direction, the vertical subunit that goes into that is provided with on the lower bolster should go into the subunit and pierce through the push pedal with the cavity one-to-one alternates the cooperation and forms the one-tenth die cavity that becomes the profile modeling setting with the battery shell, the lower mould fixed plate with the setting is connected to the lower bolster, be provided with the promotion in the lower mould assembly the propelling movement subassembly of push pedal.

As an improvement, the upper die cover plate sealing cover is arranged on the cavity, and a feeding nozzle mounting hole for mounting the feeding nozzle is formed in the upper die cover plate.

As an improvement, the side wall of the chamber in the width direction is in an arc shape and protrudes outwards.

As an improvement, the hot runner set further comprises an electric heating element, and the electric heating element is embedded in the flow distribution plate and arranged around the main runner, the branch runners and the branch runners.

As a refinement, the diameter of the main runner is D1, the diameter of the branch runner is D2, the diameter of the branch runner is D3, and D1, D2 and D3 satisfy the relationship: d1 > D2 > D3.

As an improvement, each group of the material injection nozzles comprises material injection nozzles which are centrosymmetric along the central point of the battery shell, the material injection nozzles are arranged above the corresponding chambers in a diagonal manner, and the material injection nozzles are respectively and correspondingly arranged on the central lines of the width directions of the second group and the fifth group of the single cells arranged in the length direction of the formed battery shell.

As an improvement, the push plate is provided with a tiger's mouth in a concave manner at the position where the push plate is correspondingly matched with the upper die plate, the tiger's mouth is arranged in a slope manner, the tiger's mouth and the bottom of the upper die plate are correspondingly coated around the convex mouth of the cavity, and the convex mouth is arranged around the cavity.

As an improvement, the push assembly comprises:

the lower end part of the first guide rod is connected and arranged on the lower template, the upper end part of the first guide rod penetrates through the push plate, and the push plate is arranged along the first guide rod in a sliding manner;

the upper end part of the second guide rod is connected with the push plate, and the lower end part of the second guide rod is arranged on the lower template in a sliding manner; and

the upper end part of the push rod is connected with the push plate, the lower end part of the push rod is arranged on the lower template in a sliding mode, and the lower end part of the push rod is provided with a cylindrical limiting part which is clamped with the lower template and used for limiting the push plate.

As an improvement, the insert units comprise a plurality of inserts which are equidistantly arranged along the length direction of the cavity, the inserts are arranged in one-to-one correspondence with the single lattices in the storage battery shell, and the parts of the inserts, which are positioned at two sides of the length direction of the cavity, corresponding to the side wall of the cavity in the width direction are both arranged in an arc shape and protrude outwards.

The utility model discloses plastic mould structure's beneficial effect lies in:

(1) the utility model discloses a carry out the symmetry setting to sprue, runner and subchannel in the splitter plate, cooperate the central symmetry setting of annotating the material mouth at the battery shell, make the flow, the velocity of flow of the raw materials of feeding mouth reposition of redundant personnel to every notes material mouth unanimous, even with notes material pressure, guarantee as far as possible that the income son both sides receive raw materials injection pressure balance, and then avoid as far as possible that the income son inclines because of the atress inequality to take place the slope volume too big, guarantee that the size of the battery shell of shaping all satisfies the design size, improve the mechanical properties that the battery shell resists breakage, anti-cracking;

(2) the utility model discloses a lateral wall to die cavity width direction place and the income son that is located die cavity length both sides carry out arc protruding processing, make the lateral wall of the length direction of fashioned battery shell after the cooling shrinkage, offset the cooling shrinkage through protruding surplus, make the lateral wall of battery shell width direction place not shrink inwards, improve the shaping quality of battery shell, improve product size precision;

(3) the utility model discloses a utilize to set up the push pedal on the lower bolster, utilize the ejector pin of injection molding machine to promote the push pedal, through the block at push pedal and battery shell opening border, promote the battery shell to break away from going into the son, realize the drawing of patterns of battery shell and handle, avoided the ejector pin to directly push out the shell of electric power storage, influence the surface finish;

(4) the utility model discloses a set up the tiger's mouth on the lower bolster and carry out the cladding to the convex mouth on the cope match-plate pattern, realized the quick location compound die between last mould assembly and the lower mould assembly promptly, strengthen the die cavity that sets up on the cope match-plate pattern simultaneously, avoid the high pressure of injection molding machine to make the die cavity spalling, improve the intensity of die cavity.

To above problem, the utility model provides a battery shell forming method, it is through in the compound die step of moulding plastics, utilize the sprue, the sprue sets up with the subchannel, the cooperation becomes the notes material mouth that central point that the central symmetry set up along the die cavity, in annotating the die cavity after the material mouth pours into the raw materials into the compound die, the pressure that makes the raw materials that the notes material mouth pours into keeps balanced as far as possible in the both sides of income son, make the income son as far as possible not take place the slope skew, the battery shell forming process has been solved, raw materials injection pressure produces the technical problem who influences to the product quality.

To sum up, the utility model discloses it is strong, the forming method of battery is optimized more to have plastic mould structural stability, has realized that the mechanical properties and the size precision of fashioned battery shell are high, and the surface is bright and clean.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic view of a hot runner assembly of the present invention;

fig. 4 is a schematic longitudinal sectional view of the hot runner assembly of the present invention;

fig. 5 is a schematic cross-sectional view of the hot runner assembly of the present invention;

FIG. 6 is a schematic view of the lower template in a three-dimensional structure;

fig. 7 is a first structural diagram of the lower template in front view;

FIG. 8 is a schematic diagram of a side view structure of the lower template of the present invention;

FIG. 9 is a schematic side view of the lower template of the present invention;

fig. 10 is a schematic sectional view of the chamber according to the present invention;

fig. 11 is a schematic sectional view of the chamber according to the present invention;

fig. 12 is a front view schematic diagram of the hot runner assembly of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The first embodiment is as follows:

as shown in fig. 1 to 6, 8 and 10, a 32AH battery case hot runner four-in-one mold structure includes:

the upper die assembly 10 comprises an insulating plate 1, an upper die fixing plate 2, a hot runner plate 3, an upper die cover plate 4 and an upper die plate 5 which are sequentially connected from top to bottom along the vertical direction, wherein the upper die plate 5 is provided with a plurality of chambers 51 which are arranged at equal intervals and used for injection molding of the battery shells 50, and cooling runners which are arranged around the chambers 51 and used for cooling the battery shells 50 formed in the chambers 51, the upper die assembly 10 is internally provided with a hot runner group 6 which is communicated with the chambers 51 and used for injecting thermoplastic resin into the chambers 51, the hot runner group 6 comprises a feeding nozzle 61 used for feeding, a splitter plate 62 connected with the feeding nozzle 61, and four groups of material injection nozzle groups 63 which are symmetrically arranged at equal intervals along the central point of the splitter plate 62 and are in one-to-one correspondence with the chambers 51, the feeding nozzle 61 is arranged on the central point of the other end surface of the splitter plate 62 relative to the material injection nozzle groups 63, the diversion plate 62 is arranged in a ladder shape, and is respectively provided with a main flow passage 621 positioned at the upper part, a branch flow passage 622 positioned at the lower part and a branch flow passage 623, the middle point of the main flow passage 621 is communicated with the feeding nozzle 61, the two ends of the main flow passage 621 are communicated with the middle point of the corresponding branch flow passage 622, the two ends of the branch flow passage 622 are connected with the middle point of the corresponding branch flow passage 623, and the two ends of the branch flow passage 623 are connected with the feeding nozzles 631 positioned in the feeding nozzle group 63 in the same group; and

lower mould assembly 20, lower mould assembly 20 includes mutual superimposed push pedal 7, lower bolster 8 and lower mould fixed plate 9 from last to down in proper order along vertical direction, push pedal 7 promotes the setting along vertical direction, the vertical subunit 81 of going into that is provided with on the lower bolster 8, should go into subunit 81 and pierce through push pedal 7 with cavity 51 one-to-one interlude cooperation forms the shaping chamber that becomes the profile modeling setting with battery shell 50, lower mould fixed plate 9 with the setting is connected to lower bolster 8, be provided with the promotion in the lower mould assembly 20 the propelling movement subassembly 71 of push pedal 7.

As shown in fig. 3 to 5, the hot runner set 6 further includes an electric heating element 64, and the electric heating element 64 is embedded in the diversion plate 62 and disposed around the main runner 621, the branch runners 622, and the branch runners 623.

It should be noted that, more traditional hot runner plastic mould, the utility model discloses with sprue 621 and the feeding mouth 61 intercommunication that is located flow distribution plate 62 central point department, and set up sprue 621 on flow distribution plate 62, branch runner 622, branch runner 623 and notes material mouth 631 all become central symmetry along flow distribution plate 62's center, guarantee the flow of the raw materials of every notes material mouth 631 of flow direction, pressure is all the same, and simultaneously, realize the symmetry setting on cavity 51 of notes material mouth 631 as far as, make notes material mouth 631 when smoothly feeding cavity 51, can ensure the pressure of the income 811 both sides raw materials that set up in cavity 51 as far as possible balanced, the income can not take place the slope as far as possible.

As shown in fig. 12, in addition, the hot runner plastic mold structure in this embodiment is used for injection molding 32AH battery shell, and the mold structure is a mold with four cavities, which are provided with four chambers 51, therefore, the injection nozzle set 63 is provided with four sets, each injection nozzle 631 is preferably 2, and is arranged symmetrically with respect to the center point of the chamber 51, the injection nozzles 631 are arranged on opposite corners of any one set of the chambers 51, and the injection nozzles 631 are respectively located on the center lines of the width directions of the second and fifth sets of cells 501 arranged in the length direction of the battery shell 50 formed in the chamber 51, if the injection nozzles 631 are arranged directly on the center lines of the width directions of the chamber 51, the material flows on both sides of the chamber 51 in the longitudinal direction are not sufficient, and the material can be injected into each part of the chamber 51 by the diagonal arrangement through the mutual compensation of the two injection nozzles 631.

It is further described that the junction box and the splitter plate 62 are fixed by cup head screws, the junction box is connected with the temperature control box and the hot runner plate heating device by wiring, the hot runner plate heating device heats the runner plate, the inside of the material injection nozzle 631 is provided with a valve needle, the valve needle is fixed on a valve needle hanging piece on a piston rod inside a valve needle sleeve, meanwhile, the valve needle sleeve is fixed on the upper mold fixing plate 1 by screw connection, the periphery of the valve needle sleeve is provided with air holes connected with the air holes on the upper mold fixing plate 1, further the air holes on the upper mold fixing plate are tightly attached with the air holes of the electromagnetic valve fixed on the splitter channel 623 by a high temperature resistant sealing ring, the air holes on the other side of the electromagnetic valve are connected with an air pipe in a factory building by the air pipe, the electromagnetic valve is fixed on the splitter plate 62 by screws, the electromagnetic valve is connected with a time schedule controller, the electromagnetic valve can control the opening and closing time of each valve needle by receiving signals transmitted by the timing controller.

In the injection molding process for producing the 32AH battery case in the embodiment, the injection pressure of the raw material is preferably 125Mpa, the injection time of the raw material in stages is preferably 10s, the pressure maintaining pressure of the chamber 51 is preferably 100Mpa, the pressure maintaining time of the chamber 51 is preferably 5s, and the cooling time of the chamber 51 is preferably 40 s.

As shown in fig. 4 and 5, as a preferred embodiment, the diameter of the main channel 621 is D1, the diameter of the branch channel 622 is D2, the diameter of the branch channel 623 is D3, and D1, D2 and D3 satisfy the following relations: d1 > D2 > D3.

It should be noted that the diameters of the main flow passage 621, the branch flow passage 622, and the branch flow passage 623 are divided step by step, so that the pressure of the raw material flowing in the corresponding flow passage matches the diameter of the flow passage, the diameter of the flow passage with a large flow pressure becomes large accordingly, and the problem that the diameter of the flow passage with a small flow pressure is too large to damage the internal structure of the flow distribution plate 62 is also avoided.

As shown in fig. 4, as a preferred embodiment, a positioning sleeve 611 is disposed on a side of the feeding nozzle 61 facing away from the diversion plate 62, a tapered portion 612 is disposed at an inlet end of the feeding nozzle 61, and an inverted cone 613 is connected to a lower end of the tapered portion 612.

The following are examples.

In a preferred embodiment, the upper mold cover plate 4 is hermetically covered on the cavity 51, and the upper mold cover plate 4 is provided with a feeding nozzle mounting hole 41 for mounting the feeding nozzle 61.

It should be noted that the upper mold cover plate 4 directly covers the upper mold plate 5, and the cavity is directly formed in the upper mold plate 5, so that the strength of the upper mold plate 5 is enhanced, the transition grooving of the upper mold plate 5 is avoided, and the injection mold is suitable for a battery case injection mold with a large size specification and model or an injection mold for producing a plurality of battery cases by using one mold, and the injection mold of the type mostly has a large injection pressure and is easy to crack the cavity 51 due to the injection pressure.

As a preferred embodiment, as shown in fig. 10, the push plate 7 includes:

a support frame 701, wherein an insert groove 702 is arranged in the middle of the support frame 701, and the insert groove 702 is arranged to cover the cavity 51; and

and the push plate insert 703 is embedded in the embedding groove 702, and a notch 704 for the insertion subunit 61 to penetrate is formed in the push plate insert 703.

It should be noted that the push plate 7 is separately arranged, the push plate 7 is respectively arranged as the support frame 701 and the push plate insert 703, and the push plate insert 703 is used for ejecting the battery shell 50, and the mechanical properties, the surface processing roughness and the finish of the push plate insert are superior to those of the support frame 701.

As shown in fig. 6 to 9, as a preferred embodiment, the pushing assembly 71 includes:

the lower end part of the first guide rod 711 is connected to the lower template 8, the upper end part of the first guide rod 711 penetrates through the push plate 7, and the push plate 7 is arranged along the first guide rod 711 in a sliding manner;

the upper end part of the second guide rod 712 is connected with the push plate 7, and the lower end part of the second guide rod 712 is arranged on the lower template 8 in a sliding manner; and

and the upper end part of the push rod 713 is connected with the push plate 7, the lower end part of the push rod 713 is arranged on the lower template 8 in a sliding manner, and the lower end part of the push rod 713 is provided with a cylindrical limiting part 714 which is clamped with the lower template 8 and limits the push plate 7.

It should be noted that, the utility model discloses more traditional hot runner plastic mould structure drives the outside propelling movement of push pedal 7 through ejector pin cooperation push rod 713 of injection molding machine, breaks away from the output with the inside propelling movement of battery shell of back-off on income 811, has avoided the injection molding machine directly to act on battery shell through the ejector pin, and the ejecting pit of battery shell that will break away from destroys the bright and clean on battery shell surface.

Further, the lower template 8 is provided with a step which is correspondingly matched with the limiting part 714, and the pushing distance of the push plate 7 is limited by the clamping of the step and the limiting part 714.

As shown in fig. 11, as a preferred embodiment, the side wall of the chamber 51 in the width direction is convexly curved outward.

Furthermore, the insert unit 61 includes a plurality of inserts 811 equidistantly arranged along the length direction of the cavity 51, the inserts 811 and the cells 501 in the battery case 50 are arranged in a one-to-one correspondence manner, and the portions of the side walls of the insert 811 at the two sides of the length direction of the cavity 51 corresponding to the width direction of the cavity 51 are both arranged in an arc shape and protrude outwards.

It should be noted that the battery shell can take place the cooling shrinkage after injection moulding, and the lateral wall at battery shell width direction place is very easily because there is not the additional strengthening of baffle 502, and the shrink is sunken to the back after cooling, the utility model discloses a set up curved outside protruding on cavity 51 and the income son 811 that corresponds, set up the deformation allowance in advance, utilize the deformation allowance to offset the deformation volume that the cooling shrinkage brought, make the lateral wall at battery shell width direction place not inwards sunken deformation.

As shown in fig. 10, as a preferred embodiment, a tiger's mouth 70 is concavely arranged at a position where the push plate 7 is correspondingly matched with the upper template 5, the tiger's mouth 70 is arranged in a slope manner, and is correspondingly coated with a convex mouth 52 at the bottom of the upper template 5 around the cavity 51, and the convex mouth 52 is arranged around the cavity 51.

It should be noted that, the utility model discloses an improve the cooperation precision between last mould assembly 10 and the lower mould assembly 20, through set up tiger's mouth 70 on push pedal 7, utilize the convex closure 52 on tiger's mouth 70 and the cope match-plate pattern 5 to alternate the cooperation location, utilize tiger's mouth 70 to the cladding of convex closure 52 simultaneously, consolidate cavity 51, when making notes material mouth 631 annotate the material to cavity 51, even the pressure of injection molding machine is too big, can not expand bad cavity 51 yet. The working process is as follows:

utilizing MOLDFLOW mold flow analysis software to carry out simulation analysis on the shape and injection molding conditions of a 32AH battery shell, designing a one-to-four mold structure of a 32AH battery shell hot runner, then preparing raw materials, heating and drying plastic particles to evaporate water, wherein the drying temperature is 80-90 ℃, the drying time is 2 hours, the dried raw materials are added into a charging barrel of an injection molding machine through a hopper, the granular raw materials are changed into a molten state through heating and rotation of a screw of the injection molding machine, the temperature of molten plastic is 220 ℃, an upper mold assembly 10 and a lower mold assembly 20 are positioned through a guide rod and a guide sleeve, a convex nozzle 52 and a tiger mouth 70 are inserted and combined for mold closing, after mold closing, the hot-melted raw materials are averagely distributed into branch runners 612 on two sides of a main runner 611 through a feeding nozzle 61 along the main runner 611, are averagely distributed into branch runners 613 on two sides through the branch runners 612, and are finally averagely injected into injection nozzles 61 which are arranged along the central point of a chamber 51 in, injecting the mixture into a cavity 51 after the mold closing through a material injection nozzle 61, and performing pressure maintaining treatment, wherein the injection pressure is 120-130MPa, the segmented injection time is 9-12s, the pressure maintaining pressure is 95-105MPa, and the pressure maintaining time is 5-7s, after the pressure maintaining of raw material injection is finished, glue feeding is stopped, cooling liquid is introduced from a cooling flow channel to perform cooling treatment on the raw material in the cavity 51, the cooling time is 35-45s, after the cooling is finished, an upper mold assembly 10 and a lower mold assembly 20 are opened, a mandril of an injection molding machine acts on a push rod 713 connected with the push plate 7, the push plate 7 is pushed out along a first guide rod 711 and a second guide rod 712, a 32AH battery shell reversely buckled on an insert 811 is pushed outwards through the push plate 7 to be separated from output, the molded 32AH battery shell is placed for 12h to be fully cooled, the size of the storage battery is measured, and the deformation amount caused by shrinkage in the length direction and the width direction, the dimension is ensured to meet the tolerance range of production requirements.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1.32AH battery shell hot runner one goes out four mould structures, its characterized in that includes:

go up mould assembly (10), go up mould assembly (10) from last to including heat insulating board (1), last fixed plate (2), hot runner plate (3), last apron (4) and cope match-plate pattern (5) that connect each other superpose down in proper order along vertical direction, be provided with cavity (51) that a plurality of four equidistance were arranged and were used for injection moulding battery shell (50) on cope match-plate pattern (5), and set up and to cavity (51) internal shaping around this cavity (51) battery shell (50) carry out refrigerated cooling runner, upward be provided with in mould assembly (10) with this cavity (51) intercommunication and to this cavity (51) internal injection hot plastic's hot runner group (6), this hot runner group (6) are including feeding mouth (61) that are used for the feeding, flow distribution plate (62) of being connected with this feeding mouth (61), and along the central point of this flow distribution plate (62) become four equidistance of central symmetry setting arrange and with the material injection mouth group (51) one-to-one 63) The feeding nozzle (61) is arranged on the central point of the end face of the other side of the diversion plate (62) relative to the material injection nozzle group (63), the diversion plate (62) is arranged in a step shape, a main flow passage (621) positioned at the upper part, a branch flow passage (622) positioned at the lower part and a diversion passage (623) are respectively arranged in the diversion plate, the central point of the main flow passage (621) is communicated with the feeding nozzle (61), the two ends of the main flow passage are communicated with the central points of the corresponding branch flow passages (622), the two ends of each branch flow passage (622) are connected with the central points of the corresponding diversion passages (623), and the two ends of each diversion passage (623) are connected with the material injection nozzles (631) positioned in the material injection nozzle group (63) of the same group; and

lower mould assembly (20), lower mould assembly (20) are from last to including mutual superimposed push pedal (7), lower bolster (8) and lower mould fixed plate (9) down in proper order along vertical direction, push pedal (7) promote the setting along vertical direction, the vertical subunit (81) of going into that are provided with on lower bolster (8), should go into subunit (81) and pierce through push pedal (7) with cavity (51) one-to-one alternates the cooperation and forms the shaping chamber that becomes the profile modeling setting with battery case (50), lower mould fixed plate (9) with lower bolster (8) are connected and are set up, be provided with the promotion in lower mould assembly (20) propelling movement subassembly (71) of push pedal (7).

2. Hot runner four-out mold arrangement for a 32AH battery shell according to claim 1, characterized in that the upper mold cover plate (4) is sealingly housed in the chamber (51) and that the upper mold cover plate (4) is provided with nozzle mounting holes (41) for mounting the nozzle (61).

3. The hot runner four-out mold structure for 32AH battery cases according to claim 1, wherein the side walls of the chamber (51) in the width direction are convexly curved outward.

4. The 32AH battery case hot runner-in-four die structure as claimed in claim 1, wherein said hot runner assembly (6) further comprises an electric heating element (64), said electric heating element (64) being embedded in said manifold plate (62) and disposed around said main runner (621), said branch runners (622) and said branch runners (623).

5. The 32AH accumulator housing hot runner four-out mold structure as claimed in claim 1, wherein the diameter of the main runner (621) is D1, the diameter of the branch runner (622) is D2, the diameter of the branch runner (623) is D3, and D1, D2 and D3 satisfy the relationship: d1 > D2 > D3.

6. The 32AH hot runner four-out mold structure as claimed in claim 1, wherein the plurality of injection nozzles (63) of each group includes injection nozzles (631) which are symmetrical about a center point of the battery case (50), the injection nozzles (631) are disposed diagonally above the corresponding chambers (51), and the injection nozzles (631) are disposed respectively on the widthwise midpoints of the second and fifth groups of cells (501) arranged in the lengthwise direction of the battery case (50) to be molded.

7. Hot runner four-out mold structure for 32AH battery shells according to claim 1, wherein the push plate (7) is concavely provided with a web (70) at the position corresponding to the upper mold plate (5), the web (70) is provided with a slope, the slope is correspondingly covered with a convex mouth (52) at the bottom of the upper mold plate (5) and surrounds the cavity (51), and the convex mouth (52) is arranged around the cavity (51).

8. The 32AH accumulator housing hot-runner four-out mold structure of claim 1, wherein said pusher assembly (71) comprises:

the lower end part of the first guide rod (711) is connected to the lower template (8), the upper end part of the first guide rod (711) penetrates through the push plate (7), and the push plate (7) is arranged along the first guide rod (711) in a sliding mode;

the upper end part of the second guide rod (712) is connected with the push plate (7), and the lower end part of the second guide rod (712) is arranged on the lower template (8) in a sliding manner; and

the upper end part of the push rod (713) is connected with the push plate (7), the lower end part of the push rod (713) is arranged on the lower template (8) in a sliding mode, and a cylindrical limiting part (714) which is clamped with the lower template (8) and limits the push plate (7) is arranged at the lower end part of the push rod.

9. The hot runner four-out mold structure for the 32AH battery case according to claim 1, wherein the insert unit (81) comprises a plurality of inserts (811) arranged at equal intervals along the length direction of the chamber (51), the inserts (811) are arranged in one-to-one correspondence with the cells (501) in the battery case (50), and the portions of the inserts (811) located at both sides of the chamber (51) in the length direction, corresponding to the side walls of the chamber (51) in the width direction, are arranged to protrude outward in an arc shape.

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