CN216506445U - Accurate injection mold of compound die - Google Patents

Abstract

The utility model relates to an injection mold with accurate mold closing, which comprises an upper mold and a lower mold, wherein the lower mold is arranged right below the upper mold and matched with the upper mold; the method is characterized in that: the injection mold also comprises a guiding and positioning structure, the guiding and positioning structure comprises a plurality of positioning slots arranged on the top surface of the lower mold, a plurality of positioning insertion blocks arranged on the bottom surface of the upper mold, a plurality of guide posts and a plurality of guide sleeves, each guide post is arranged on the lower mold, and each guide sleeve is arranged on the upper mold and is respectively sleeved on the corresponding guide post; the positioning insertion blocks are in the same number with the positioning insertion slots and are in one-to-one correspondence with the positioning insertion slots, and each positioning insertion block is respectively in insertion fit with the corresponding positioning insertion slot. The injection mold can ensure that the lower mold and the upper mold are accurately matched in the mold closing process, is favorable for ensuring the molding quality of injection molding pieces, and effectively prolongs the service life of the injection mold.

Description

Accurate injection mold of compound die

Technical Field

The utility model relates to a mold, in particular to an injection mold with accurate mold closing.

Background

Injection molds are tools that produce injection molded parts and also give the injection molded parts complete structure and precise dimensions. There are a large number of irregularly shaped molded parts in the vehicle part, such as the vehicle harness snap, as shown in fig. 4, the vehicle harness snap molding 50 is formed by the wire harnessSeat 501, bunch activity fastener 502, back-off dish 503, joint connecting rod 504 and a plurality of back-off joint blade 505 constitute, and the overall dimension of car bunch buckle plastic part is 40.98mm x 22.1mm x 20 mm, and the product wall thickness is on average about 1.1mm, and maximum thickness is about 3.5mm, and thinnest department is back-off joint blade 0.5 mm, and the volume is 1.6 x 10³ mm²The size of the plastic part is smaller, but the structure is more complex, and the plastic part is required after being molded: the surface is smooth, no burr is generated, the buckle is not damaged, the clamping force reaches a preset target value, the characteristics of good mechanical strength, toughness and the like are required, and other parts have no obvious defect traces. In order to ensure the molding quality of the injection molding piece, the lower die and the upper die are required to be accurately matched in the die assembly process of the injection mold, and the positions of the lower die and the upper die are required to be accurately adjusted when the mold is installed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing the injection mold with accurate mold closing, which can ensure that the lower mold and the upper mold are accurately matched in the mold closing process, is favorable for ensuring the molding quality of injection molding parts and effectively prolongs the service life of the injection mold. The technical scheme is as follows:

an injection mold with accurate mold closing comprises an upper mold and a lower mold, wherein the lower mold is arranged right below the upper mold and matched with the upper mold; the method is characterized in that: the injection mold also comprises a guiding and positioning structure, the guiding and positioning structure comprises a plurality of positioning slots arranged on the top surface of the lower mold, a plurality of positioning insertion blocks arranged on the bottom surface of the upper mold, a plurality of guide posts and a plurality of guide sleeves, each guide post is arranged on the lower mold, and each guide sleeve is arranged on the upper mold and is respectively sleeved on the corresponding guide post; the positioning insertion blocks are in the same number and correspond to the positioning insertion slots one by one, and each positioning insertion block is respectively in insertion fit with the corresponding positioning insertion slot.

Typically, the upper mold forms a cavity portion of the injection mold and the lower mold forms a core portion of the injection mold.

When the injection mold starts to close the mold, the lower mold and the upper mold are close to each other, the top surface of the lower mold and the bottom surface of the upper mold are accurately and stably close to each other through sliding fit between each guide post and each guide sleeve until each positioning insert block on the lower mold is respectively in inserting fit with the corresponding positioning slot on the lower mold, and finally accurate closing of the parting surface is realized. Above-mentioned injection mold constitutes the second grade direction between lower mould and the last mould through add guiding orientation structure between lower mould and last mould, can ensure the lower mould and realize accurate cooperation with last mould at the compound die in-process, further avoids the compound die shake and leads to the lower mould to be inaccurate with last mould counterpoint, increases substantially the precision of compound die, is favorable to guaranteeing the shaping quality to the injection molding, effectively prolongs injection mold's life.

In a preferred scheme, the upper die comprises an upper die base, an upper die core, a sprue bush and at least one upper die insert group, the upper die is installed on the upper die base, the upper die core and the sprue bush are installed on the upper die core, the upper die insert group is installed on the upper die core, each guide sleeve is installed on the upper die, a plurality of upwards-recessed tiger mouths are arranged at the edge part of the bottom surface of the upper die core, and the tiger mouths and the inner wall of the upper die jointly enclose the positioning insertion slots; the lower die comprises a lower die base, a lower die, a die leg, a lower die kernel and at least one lower die insert group, the lower die is installed on the lower die base through the die leg, the lower die kernel is installed on the lower die, and the lower die insert group is installed on the lower die kernel; each guide post is installed on the lower die, and a plurality of positioning insertion blocks are arranged on the top surface of the lower die core. The upper die core and the upper die insert group are used for forming the upper half glue position of a product, and the flow channel passes through the upper die insert group and the sprue; the lower die core and the lower die insert group are used for forming the lower half part of a product, and the runner passes through the lower die insert group. When the injection mold completes mold closing, the upper mold insert group and the lower mold insert group are matched with each other and jointly enclose an injection molding part forming cavity for forming an injection molding part; after the die assembly is completed, the injection molding raw material can be injected into the injection molding part forming cavity through the sprue bushing for injection molding.

Generally, the upper mold core, the upper mold insert group, the lower mold core and the lower mold insert group are all made of pre-hard plastic mold steel ASSAB 718, and the pre-hard plastic mold steel ASSAB 718 has excellent mechanical property, machinability, high hardenability, good electric machinability, dermatoglyph machinability and excellent polishing property, is particularly suitable for mass production of plastic molds, and has the factory hardness of B290-310.

In a more preferable scheme, the upper die insert group is connected with the upper die core through a plurality of first positioning pins; the lower die insert group is connected with the lower die core through a plurality of second positioning pins. Thus, the positioning of the upper die insert group and the lower die insert group can be more accurate.

In a more preferable scheme, the upper die insert group comprises an upper die runner insert, an upper die blade seat insert and a plurality of upper die blade inserts; the upper die runner insert is arranged on the upper die core, an upper die runner communicated with the sprue is arranged on the upper die runner insert, a first beam seat forming groove and a first beam movable fastener forming groove are further formed in the upper die runner insert, the first beam seat forming groove is communicated with the tail end of the upper die runner, and the first beam movable fastener forming groove is communicated with one side of the first beam seat forming groove; the upper die blade seat insert is arranged on the edge of the upper die runner insert, a gap between the upper die blade seat insert and the upper die runner insert forms a first inverted buckle disc forming groove, and the first inverted buckle disc forming groove is communicated with the other side of the first wire bundling seat forming groove; the upper die blade seat insert is provided with a first connecting rod blade forming groove and a plurality of first blade slots which are arranged along the length direction of the first connecting rod blade forming groove, the first connecting rod blade forming groove is communicated with the first back-off disc forming groove, each upper die blade insert is arranged in the corresponding first blade slot, and two adjacent upper die blade inserts form a first back-off clamping blade forming groove; the lower die insert group comprises a lower die runner insert, a lower die blade seat insert and a plurality of lower die blade inserts; the lower die runner insert is arranged on the lower die core, a lower die runner is arranged on the lower die runner insert, a second wire bunching seat forming groove and a second wire bunching movable fastener forming groove are further formed in the lower die runner insert, the second wire bunching seat forming groove is communicated with the tail end of the lower die runner, and the second wire bunching movable fastener forming groove is communicated with one side of the second wire bunching seat forming groove; the lower die blade seat insert is arranged on the edge of the lower die runner insert, a gap between the lower die blade seat insert and the lower die runner insert forms a second inverted buckle disc forming groove, and the second inverted buckle disc forming groove is communicated with the other side of the second wire harness seat forming groove; the lower die blade seat insert is provided with a second connecting rod blade forming groove and a plurality of second blade slots arranged along the length direction of the second connecting rod blade forming groove, the second connecting rod blade forming groove is communicated with the second back-off plate forming groove, each lower die blade insert is arranged in the corresponding second blade slot, and two adjacent lower die blade inserts form a second back-off clamping blade forming groove. By adopting the structure, the injection mould can be used for completing the injection moulding of the automobile wiring harness buckle plastic part; after the lower die and the upper die are closed, a first wire bundling seat forming groove, a second wire bundling seat forming groove, a first wire bundling movable fastener forming groove, a second wire bundling movable fastener forming groove, a first inverted buckle disc forming groove, a second inverted buckle disc forming groove, a first connecting rod blade forming groove, a second connecting rod blade forming groove, each first blade slot and each second blade slot jointly enclose a plastic part forming cavity for forming the automobile wire harness buckle plastic part; then, injecting the injection molding raw material into the upper mold runner and the lower mold runner through the sprue bushing, and then flowing into the first wiring seat forming groove, the second wiring seat forming groove, the first wiring movable fastener forming groove, the second wiring movable fastener forming groove, the first back-off disc forming groove, the second back-off disc forming groove, the first connecting rod blade forming groove, the second connecting rod blade forming groove, each first blade slot and each second blade slot, forming the wiring seat of the automobile wiring harness buckle plastic part, the wiring movable fastener, the back-off disc, the clamping connecting rod and each back-off clamping blade, and realizing the injection molding of the automobile wiring harness buckle plastic part.

In a further preferred scheme, first bunch of line seat shaping groove, first bunch of line activity fastener shaping groove all are equipped with at least one first pinhole, second bunch of line seat shaping groove, second bunch of line activity fastener shaping groove all are equipped with at least one the second pinhole.

In a further preferred scheme, first back-off joint blade shaping groove be equipped with at least one first pinhole, second back-off joint blade shaping groove be equipped with at least one the second pinhole.

Compared with the prior art, the utility model has the following advantages:

this kind of injection mold constitutes the second grade direction between lower mould and the last mould through add the guide location structure between lower mould and last mould, can ensure the lower mould and realize accurate cooperation with last mould at the compound die in-process, further avoids the compound die shake and leads to the lower mould to be inaccurate with last mould counterpoint, increases substantially the precision of compound die, is favorable to guaranteeing the shaping quality to the injection molding, effectively prolongs injection mold's life.

Drawings

Fig. 1 is a schematic structural view of an injection mold according to a preferred embodiment of the present invention.

Fig. 2 is a bottom view of an upper mold of the injection mold shown in fig. 1.

Fig. 3 is a plan view of a lower mold of the injection mold shown in fig. 1.

Fig. 4 is a schematic structural diagram of the snap-in molding piece of the automobile wiring harness.

Detailed Description

As shown in fig. 1-4, the injection mold with precise mold closing comprises an upper mold 1, a lower mold 2 and a guiding and positioning structure 3, wherein the lower mold 2 is arranged right below the upper mold 1 and is matched with the upper mold 1; the guiding and positioning structure 3 comprises a plurality of guiding columns 31, a plurality of guiding sleeves 32, a plurality of positioning slots 33 arranged on the bottom surface of the upper die 1 and a plurality of positioning insertion blocks 34 arranged on the top surface of the lower die 2, wherein each guiding column 31 is arranged on the lower die 2, and each guiding sleeve 32 is arranged on the upper die 1 and is respectively sleeved on the corresponding guiding column 31; the positioning insertion blocks 34 are the same in number and correspond to the positioning insertion slots 33 one by one, and each positioning insertion block 34 is respectively matched with the corresponding positioning insertion slot 33 in an inserting manner.

In this embodiment, the upper die 1 includes an upper die base 11, an upper die 12, an upper die core 13, a sprue 14 and a plurality of upper die insert sets 15, the upper die 12 is mounted on the upper die base 11, the upper die core 13 and the sprue 14 are both mounted on the upper die 12, the upper die insert sets 15 are mounted on the upper die core 13, each guide sleeve 32 is mounted on the upper die 12, a plurality of upwardly recessed tiger mouths 131 are arranged at the edge of the bottom surface of the upper die core 13, and the tiger mouths 131 and the inner wall of the upper die 12 jointly enclose a positioning slot 33; the lower die 2 comprises a lower die base 21, a lower die 22, a die leg 23, a lower die core 24 and a plurality of lower die insert groups 25, wherein the lower die 22 is installed on the lower die base 21 through the die leg 23, the lower die core 24 is installed on the lower die 22, and the lower die insert groups 25 are installed on the lower die core 24; each guide post 31 is mounted on the lower mold 22, and the top surface of the lower mold core 24 is provided with a plurality of positioning insertion blocks 34. The upper die 1 forms a cavity part of the injection die, the upper die core 13 and the upper die insert group 15 are used for forming the glue position of the upper half part of a product, and a flow channel passes through the upper die insert group 15 and the sprue 14; the lower mold 2 constitutes a core part of the injection mold, the lower core 24, and the lower insert group 25 are used to mold the lower half of a product, and a runner passes over the lower insert group 25. When the injection mold is closed, the upper mold insert group 15 and the lower mold insert group 25 are matched with each other and jointly enclose an injection molding part forming cavity for forming an injection molding part; after the die assembly is completed, the injection molding raw material can be injected into the molding cavity of the injection molding part through the sprue 14 for injection molding.

The upper die core 13, the upper die insert group 15, the lower die core 24 and the lower die insert group 25 are all made of pre-hard plastic die steel ASSAB 718, have excellent mechanical property, machinability, high hardenability, good electromachining property, dermatoglyph processability and excellent polishing property, are particularly suitable for plastic dies produced in large scale, and have the factory hardness of B290-310.

The upper die insert group 15 is connected with the upper die core 13 through a plurality of first positioning pins 16; the lower insert die set 25 and the lower core die 24 are connected by a plurality of second positioning pins 26. In this way, the positioning of the upper insert group 15 and the lower insert group 25 can be further accurate.

The upper die insert set 15 includes an upper die runner insert 151, an upper die blade seat insert 152, and a plurality of upper die blade inserts 153; the upper die runner insert 151 is mounted on the upper die core 13, the upper die runner insert 151 is provided with an upper die runner 1511 communicated with the sprue 14, the upper die runner insert 151 is further provided with a first wire bundling seat forming groove 1512 and a first wire bundling movable fastener forming groove 1513, the first wire bundling seat forming groove 1512 is communicated with the tail end of the upper die runner 1511, and the first wire bundling movable fastener forming groove 1513 is communicated with one side of the first wire bundling seat forming groove 1512; the upper die paddle seat insert 152 is mounted on the edge of the upper die runner insert 151, a gap between the upper die paddle seat insert 152 and the upper die runner insert 151 forms a first inverted disc forming groove 154, and the first inverted disc forming groove 154 is communicated with the other side of the first wire holder forming groove 1512; the upper die blade seat insert 152 is provided with a first connecting rod blade forming groove 1521 and a plurality of first blade slots 1522 arranged along the length direction of the first connecting rod blade forming groove 1521, the first connecting rod blade forming groove 1521 is communicated with the first inverted buckle disc forming groove 154, each upper die blade insert 153 is arranged in the corresponding first blade slot 1522, and two adjacent upper die blade inserts 153 form a first inverted buckle clamping blade forming groove 155; lower die insert set 25 includes lower die runner insert 251, lower die blade seat insert 252, and a plurality of lower die blade inserts 253; the lower die runner insert 251 is mounted on the lower die core 24, the lower die runner insert 251 is provided with a lower die runner 2511, the lower die runner insert 251 is further provided with a second wire bunching seat forming groove 2512 and a second wire bunching movable fastener forming groove 2513, the second wire bunching seat forming groove 2512 is communicated with the tail end of the lower die runner 2511, and the second wire bunching movable fastener forming groove 2513 is communicated with one side of the second wire bunching seat forming groove 2512; the lower die blade holder insert 252 is mounted on the edge of the lower die runner insert 251, a second inverted disc molding groove 254 is formed by a gap between the lower die blade holder insert 252 and the lower die runner insert 251, and the second inverted disc molding groove 254 is communicated with the other side of the second wire harness holder molding groove 2512; the lower die blade holder insert 252 is provided with a second link blade forming groove 2521 and a plurality of second blade slots 2522 arranged along the length direction of the second link blade forming groove 2521, the second link blade forming groove 2521 is communicated with the second inverted buckle disc forming groove 254, each lower die blade insert 253 is installed in the corresponding second blade slot 2522, and two adjacent lower die blade inserts 253 form a second inverted buckle clamping blade forming groove 255; the first wire bundling seat forming groove 1512 and the first wire bundling movable fastener forming groove 1513 are both provided with at least one first needle hole 101, and the second wire bundling seat forming groove 2512 and the second wire bundling movable fastener forming groove 2513 are both provided with at least one second needle hole 201; the first reverse-buckling clamping blade forming groove 155 is provided with at least one first needle hole 101, and the second reverse-buckling clamping blade forming groove 255 is provided with at least one second needle hole 201.

The following briefly describes the working principle of the injection mold:

when the injection mold starts to close the mold, the lower mold 2 and the upper mold 1 approach each other, and the top surface of the lower mold 2 and the bottom surface of the upper mold 1 accurately and stably approach each other through the sliding fit between each guide post 31 and each guide sleeve 32 until each positioning insert block 34 on the lower mold 2 is respectively in inserted fit with the corresponding positioning slot 33 on the lower mold 2, and finally, the accurate closing of the parting surface is realized. Above-mentioned injection mold constitutes the second grade direction between lower mould 2 and last mould 1 through addding the guide location structure between lower mould 2 and last mould 1, can ensure lower mould 2 and last mould 1 at the compound die in-process and realize accurate cooperation, further avoids the compound die shake and leads to lower mould 2 and last mould 1 to the inaccurate, increases substantially the precision of compound die, is favorable to guaranteeing the shaping quality to the injection molding.

After the lower die 2 and the upper die 1 are matched, the upper die insert group 15 and the lower die insert group 25 are matched and jointly enclose a plastic part molding cavity for molding the automobile wire harness buckle plastic part 50 (the plastic part molding cavity is composed of a first wire harness seat molding groove 1512, a second wire harness seat molding groove 2512, a first wire harness movable fastener molding groove 1513, a second wire harness movable fastener molding groove 2513, a first inverted buckle disc molding groove 154, a second inverted buckle disc molding groove 254, a first connecting rod blade molding groove 1521, a second connecting rod blade molding groove 2521, each first blade slot 1522 and each second blade slot 2522); then, injecting a PA66 injection molding material into the upper mold runner 1511 and the lower mold runner 2511 through the sprue 14, and then flowing into the first wire harness seat forming groove 1512, the second wire harness seat forming groove 2512, the first wire harness movable fastener forming groove 1513, the second wire harness movable fastener forming groove 2513, the first inverted buckle disc forming groove 154, the second inverted buckle disc forming groove 254, the first link blade forming groove 1521, the second link blade forming groove 2521, each first blade slot 1522 and each second blade slot 2522, so as to form the wire harness seat 501, the wire harness movable fastener 502, the inverted buckle disc 503, the clamping link 504 and the plurality of inverted buckle clamping blades 505 of the automotive wire harness buckle plastic part 50, thereby realizing the injection molding of the automotive wire harness buckle plastic part 50.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and the equivalent or simple change of the structure, the characteristics and the principle described in the present patent idea is included in the protection scope of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims (6)

1. An injection mold with accurate mold closing comprises an upper mold and a lower mold, wherein the lower mold is arranged right below the upper mold and matched with the upper mold; the method is characterized in that: the injection mold also comprises a guiding and positioning structure, the guiding and positioning structure comprises a plurality of positioning slots arranged on the top surface of the lower mold, a plurality of positioning insertion blocks arranged on the bottom surface of the upper mold, a plurality of guide posts and a plurality of guide sleeves, each guide post is arranged on the lower mold, and each guide sleeve is arranged on the upper mold and is respectively sleeved on the corresponding guide post; the positioning insertion blocks are in the same number and correspond to the positioning insertion slots one by one, and each positioning insertion block is respectively in insertion fit with the corresponding positioning insertion slot.

2. The injection mold of claim 1, wherein the mold closing is precise: the upper die comprises an upper die base, an upper die core, a sprue and at least one upper die insert group, the upper die is installed on the upper die base, the upper die core and the sprue are installed on the upper die, the upper die insert group is installed on the upper die core, each guide sleeve is installed on the upper die, a plurality of upwards-recessed tiger mouths are arranged at the edge part of the bottom surface of the upper die core, and the tiger mouths and the inner wall of the upper die jointly enclose to form the positioning insertion slots; the lower die comprises a lower die base, a lower die, a die leg, a lower die kernel and at least one lower die insert group, the lower die is installed on the lower die base through the die leg, the lower die kernel is installed on the lower die, and the lower die insert group is installed on the lower die kernel; each guide post is installed on the lower die, and a plurality of positioning insertion blocks are arranged on the top surface of the lower die core.

3. The injection mold of claim 2, wherein the mold closing is precise: the upper die insert group is connected with the upper die core through a plurality of first positioning pins; the lower die insert group is connected with the lower die core through a plurality of second positioning pins.

4. An injection mold with accurate mold closing according to claim 2 or 3, characterized in that: the upper die insert group comprises an upper die runner insert, an upper die blade seat insert and a plurality of upper die blade inserts; the upper die runner insert is arranged on the upper die core, an upper die runner communicated with the sprue is arranged on the upper die runner insert, a first beam seat forming groove and a first beam movable fastener forming groove are further formed in the upper die runner insert, the first beam seat forming groove is communicated with the tail end of the upper die runner, and the first beam movable fastener forming groove is communicated with one side of the first beam seat forming groove; the upper die blade seat insert is arranged on the edge of the upper die runner insert, a gap between the upper die blade seat insert and the upper die runner insert forms a first inverted buckle disc forming groove, and the first inverted buckle disc forming groove is communicated with the other side of the first wire bundling seat forming groove; the upper die blade base insert is provided with a first connecting rod blade forming groove and a plurality of first blade slots which are arranged along the length direction of the first connecting rod blade forming groove, the first connecting rod blade forming groove is communicated with the first back-off disc forming groove, each upper die blade insert is arranged in the corresponding first blade slot, and two adjacent upper die blade inserts form a first back-off clamping blade forming groove; the lower die insert group comprises a lower die runner insert, a lower die blade seat insert and a plurality of lower die blade inserts; the lower die runner insert is arranged on the lower die core, a lower die runner is arranged on the lower die runner insert, a second wire bunching seat forming groove and a second wire bunching movable fastener forming groove are further formed in the lower die runner insert, the second wire bunching seat forming groove is communicated with the tail end of the lower die runner, and the second wire bunching movable fastener forming groove is communicated with one side of the second wire bunching seat forming groove; the lower die blade seat insert is arranged on the edge of the lower die runner insert, a gap between the lower die blade seat insert and the lower die runner insert forms a second inverted buckle plate forming groove, and the second inverted buckle plate forming groove is communicated with the other side of the second wire bundling seat forming groove; the lower die blade seat insert is provided with a second connecting rod blade forming groove and a plurality of second blade slots arranged along the length direction of the second connecting rod blade forming groove, the second connecting rod blade forming groove is communicated with the second back-off plate forming groove, each lower die blade insert is arranged in the corresponding second blade slot, and two adjacent lower die blade inserts form a second back-off clamping blade forming groove.

5. An injection mold with accurate mold closing according to claim 4, characterized in that: first bunch of line seat shaping groove, first bunch of line activity fastener shaping groove all are equipped with at least one first pinhole, second bunch of line seat shaping groove, second bunch of line activity fastener shaping groove all are equipped with at least one second pinhole.

6. The injection mold with accurate mold closing according to claim 4, characterized in that: first back-off joint blade shaping groove is equipped with at least one first pinhole, second back-off joint blade shaping groove is equipped with at least one second pinhole.

Images