CN114347378B - Double-color injection molding mold for automobile sealing strip - Google Patents
Double-color injection molding mold for automobile sealing strip Download PDFInfo
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- CN114347378B CN114347378B CN202111654363.3A CN202111654363A CN114347378B CN 114347378 B CN114347378 B CN 114347378B CN 202111654363 A CN202111654363 A CN 202111654363A CN 114347378 B CN114347378 B CN 114347378B
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Abstract
The application discloses a double-color injection molding mold for an automobile sealing strip, which comprises a first mold base and a second mold base, wherein a rotary base block with rotary displacement switching is arranged in the first mold base, two first substrate injection mold cores are arranged on the rotary base block, a substrate injection molding part and a package injection molding part are arranged on any first substrate injection mold core, a second substrate injection mold core and a package injection mold core are arranged on the second mold base, and a packing part is arranged on the second substrate injection mold core. According to the application, through the design of the ejection rotary displacement switching of the rotary base block, the high-efficiency smoothness and the coordination stability of the double injection molding station switching of the die are met, and the secondary molding coordination precision is greatly improved. The synchronous forming requirement of the paired workpieces is met, and the relative forming precision of the paired workpieces is uniform. The double-station plastic injection molding device has the advantages that the matching design of the base plate injection molding part and the coating glue injection part is realized, the requirement of the same-side double-station plastic injection molding is met, the die cost is reduced, meanwhile, the glue injection molding is more uniform, the product injection molding deformation tolerance is reduced, and the product qualification rate is greatly improved.
Description
Technical Field
The application relates to a double-color injection molding mold for an automobile sealing strip, and belongs to the technical field of injection molds.
Background
The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and precise dimensions. Injection molding is a process used in mass production of parts of complex shape. Specifically, the heated and melted plastic is injected into a die cavity under high pressure by an injection molding machine, and a formed product is obtained after cooling and solidification.
There is an automobile sealing strip at present, and it includes sealing strip base plate main part and sets up the protruding rib in sealing strip base plate main part, possesses the parcel injection molding body of overmoulding on this protruding rib, is equipped with a plurality of joining in marriage in the sealing strip base plate main part and connects the through-hole, and parcel injection molding body is two kinds of colours injection molding with sealing strip base plate main part.
The traditional injection molding mode adopts two sets of moulds, and one set of injection mould is used for carrying out injection molding to sealing strip base plate main part, then carries out parcel injection molding through one set of injection mould, and operating efficiency is lower like this, and the cost is higher, in addition, sealing strip base plate main part has the shrinkage deformation volume to a certain extent after the shaping drawing of patterns, and during the follow-up secondary injection molding, it appears carrying the tolerance easily, causes the condition emergence that can't the secondary injection molding, and the disability rate is higher.
To this condition, the mould that can realize secondary injection moulding appears in the prior art, it adopts the rotary displacement of a die holder to realize the cooperation of two stations, realize the rotatory secondary injection moulding of same platform, this kind of injection moulding adopts the whole rotatory counterpoint cooperation to the die carrier, die carrier rotary drive is very difficult, rotatory counterpoint stability is relatively poor, in addition, during secondary injection moulding, its injecting glue mouth generally sets up in rotatory die carrier, and in order to dodge the work piece of rotational moulding after the drawing of patterns, generally adopt the mode of tip injecting glue, tip injecting glue can cause injecting glue homogeneity poor, the uncontrollable situation of shrinkage deformation volume after the shaping, lead to the work piece qualification rate lower.
Disclosure of Invention
The application aims to solve the defects in the prior art, and provides a double-color injection molding die for an automobile sealing strip, aiming at the problems of poor integral rotation stability of a traditional secondary injection molding die carrier and lower qualification rate of products with larger cold shrinkage deformation caused by end injection.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
the double-color injection molding mold of the automobile sealing strip comprises a sealing strip substrate main body and raised ribs arranged on the sealing strip substrate main body, wherein the raised ribs are provided with a secondarily molded package injection molding body, the sealing strip substrate main body is provided with a plurality of matching through holes,
the double-color injection molding mold comprises a first mold base and a second mold base which are provided with relative opening and closing displacement,
a rotary base block with 180-degree rotary displacement switching is arranged in the first die holder, two first substrate injection die cores are arranged on the rotary base block at intervals, a substrate injection part and a coating injection part are arranged on any first substrate injection die core,
the sealing strip comprises a sealing strip substrate body and is characterized in that a second substrate injection cavity and a wrapping injection cavity are arranged on the second die holder at intervals, a sealing part for sealing the wrapping injection part is arranged on the second substrate injection cavity, an injection molding cavity of the sealing strip substrate body is formed between the second substrate injection cavity and the first substrate injection cavity, and an injection molding cavity of the automobile sealing strip is formed between the sealing part and the first substrate injection cavity.
Preferably, the rotary base block has a linear reciprocating displacement and a self-rotation switching displacement along a mold opening and closing direction.
Preferably, two first injection molding cavities arranged in a mirror symmetry mode are formed in the first substrate injection molding core, two matched molding cavities arranged in a mirror symmetry mode are formed in the wrapping injection molding core, two second injection molding cavities arranged in a mirror symmetry mode are formed in the second substrate injection molding core, an injection molding cavity of the sealing strip substrate main body is formed between the first injection molding cavity and the second injection molding cavity, and an injection molding cavity of the automobile sealing strip is formed between the first injection molding cavity and the matched molding cavity.
Preferably, the first injection molding cavity comprises a first sealing strip substrate molding cavity for molding the sealing strip substrate and a first protruding rib molding cavity for molding the protruding ribs,
the second injection molding cavity comprises a second sealing strip substrate molding cavity matched with the first sealing strip substrate molding cavity and a second raised rib molding cavity matched with the first raised rib molding cavity,
the wrapping injection mold core comprises a wrapping injection molding cavity for molding the wrapping injection molding.
Preferably, the substrate injection molding part comprises a plurality of substrate glue injection channels arranged on the first sealing strip substrate molding cavity.
Preferably, the first substrate injection mold core is provided with a central boss positioned between the two first injection molding cavities, the package glue injection part comprises a central glue injection part arranged on the central boss, a plurality of conjoined glue channels which are distributed at intervals are arranged between the central glue injection part and any first injection molding cavity, one side of the first glue injection molding cavity facing the central glue injection part is provided with a partition strip groove,
the sealing part is a sealing rib which is arranged on the second injection molding cavity and is used for being matched with the sealing strip groove.
Preferably, a plurality of matched through hole type columns for matched through hole forming are arranged on the first sealing strip substrate forming cavity of the first injection molding cavity.
Preferably, the sealing strip substrate main body is provided with a flanging part, the flanging part is provided with a flanging through hole,
the first baseplate injection molding core is provided with a flanging molding movable die which is in one-to-one correspondence with any first injection molding cavity, and the flanging molding movable die is provided with a flanging through hole type column for flanging through hole molding.
Preferably, alignment structures are respectively disposed between the first substrate injection mold core and the second substrate injection mold core, and between the first substrate injection mold core and the second substrate injection mold core.
The beneficial effects of the application are mainly as follows:
1. through the design of the ejection rotary displacement switching of the rotary base block, the high-efficiency smoothness and the coordination stability of the double injection molding station switching of the die are met, and the secondary molding coordination precision is greatly improved.
2. The synchronous forming requirement of the paired workpieces is met, and the relative forming precision of the paired workpieces is uniform.
3. The double-station plastic injection molding device has the advantages that the matching design of the base plate injection molding part and the coating glue injection part is realized, the requirement of the same-side double-station plastic injection molding is met, the die cost is reduced, meanwhile, the glue injection molding is more uniform, the product injection molding deformation tolerance is reduced, and the product qualification rate is greatly improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a first die holder in a two-shot injection molding die for an automobile sealing strip.
Fig. 2 is a schematic structural view of a second die holder in a two-shot injection molding die for an automobile sealing strip.
Fig. 3 is a schematic structural view of a pair of sealing strip substrate bodies in the present application.
Fig. 4 is a schematic view showing another structure of the paired sealing strip substrate main bodies in the present application.
Fig. 5 is a schematic view of the structure of the paired automobile weather strips in the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The application provides a double-color injection molding die for an automobile sealing strip, as shown in fig. 3 to 5, the automobile sealing strip 10 comprises a sealing strip substrate main body 11 and a raised rib 12 arranged on the sealing strip substrate main body, the raised rib 12 is provided with a secondarily molded package injection molding body 13, and the sealing strip substrate main body is provided with a plurality of matching through holes 14.
Specifically, the sealing strip substrate main body 11 and the protruding ribs 12 are integrally injection molded, which is in the prior art, and the molding structure is shown in fig. 3 and 4 by designing a molding cavity with profiling shape to meet the requirement of integral injection molding.
The encapsulation injection molding 13 is a structure formed on the protruding ribs 12, and it is required to perform two-shot molding, and there is a difference in color and/or material, as shown in fig. 5 and 5 after molding.
In the traditional process, the split injection molding or the injection molding of the rotary die carrier switching station is adopted, the split injection molding precision is poor, the rejection probability is high, the matching of the die carrier switching station can have the defects of difficult displacement and the like, in addition, the relative precision of the pair of workpieces is difficult to be ensured, and the production efficiency is low.
In order to overcome the drawbacks of the prior art, a dual-color injection mold as shown in fig. 1 and 2 is provided, which includes a first mold base 1 and a second mold base 2 having relative opening and closing displacement.
The first die holder is internally provided with a rotary base block 3 with 180-degree rotary displacement switching, the rotary base block 3 is provided with two first substrate injection cores 4 which are arranged at intervals, and any first substrate injection core 4 is provided with a substrate injection part 5 and a coating injection part 6.
The second die holder is provided with a second substrate injection die core 7 and a wrapping injection die core 8 which are arranged at intervals, the second substrate injection die core is provided with a sealing part 9 for sealing and wrapping the glue injection part, an injection molding cavity of the sealing strip substrate main body is formed between the second substrate injection die core and the first substrate injection die core, and an injection molding cavity of the automobile sealing strip is formed between the sealing part and the first substrate injection die core.
The specific implementation process and principle description:
when injection molding operation is performed, injection molding matching is performed between the first substrate injection molding core 4 and the second substrate injection molding core 7, after injection molding is performed, an integral intermediate of the sealing strip substrate main body 11 and the protruding ribs 12 is formed, the intermediate remains in the first substrate injection molding core 4, position degree switching of the two first substrate injection molding cores 4 is performed along with the rotating base block 3, the first substrate injection molding core 4 with the intermediate is switched to be matched with the wrapping injection molding core 8, corresponding finished product unloading is performed after molding at the station, and then the rotary circulation is performed, so that the requirement of high-efficiency rotary switching of the mold cavity for step molding is met.
Through the rotary displacement cooperation of the rotary base block 3 in the first die holder 1, the efficient rotary switching alignment requirement can be achieved, the rotary operation time is reduced, the molding stability requirement is met, particularly, after the intermediate body is molded, the secondary injection molding is carried out under the condition that the intermediate body does not cause larger cooling deformation quantity, the relative injection molding binding force is reliable, the cooling deformation is synchronous after the integral molding, the two deformation quantities are relatively controllable, and the product qualification rate is greatly improved.
It is described in detail that, when the first substrate injection mold core 4 and the second substrate injection mold core 7 are spliced and matched, the sealing and separating part 9 can form isolation with the package injection part 6, so that independent and reliable stability of the injection molding cavity of the sealing strip substrate main body is met, and when the secondary injection molding is performed, the package injection part 6 is communicated with the cavity of the package injection mold core 8, so that the package injection part molding is realized.
In one embodiment, the rotating base block 3 has a linear reciprocating displacement and a self-rotation switching displacement in the mold opening and closing direction.
Specifically, a central connection part is provided between the two first substrate injection mold cores 4, a power source in driving fit with the central connection part is provided in the first mold base, and the power source can realize ejection rotation retraction driving of the central connection part, thereby satisfying the switching function of the first substrate injection mold cores 4.
In general, a power source having a linear displacement and a rotational displacement is used, and two power sources in which the rotational displacement and the linear displacement are combined may be used.
Of course, the ratchet matching structure can also be designed, and the automatic rotary retraction can be realized by adopting only one jacking mechanism, specifically, the jacking mechanism and the central connecting part are elastically matched by adopting relative rotation and back pulling, and in the ejection process, the automatic rotary retraction is realized by adopting a mode of staggered matching of a ratchet and the central connecting part, so that the automatic rotary retraction is similar to the telescopic switching structure of a ball pen.
Only the transmission structure which is required to be reset after the rotating base block 3 is lifted and rotated is satisfied, and the transmission structure is within the protection scope of the scheme.
In a specific embodiment, two first injection molding cavities 40 which are arranged in a mirror symmetry manner are arranged on the first substrate injection molding core 4, two matched molding cavities which are arranged in a mirror symmetry manner are arranged on the wrapping injection molding core 8, two second injection molding cavities which are arranged in a mirror symmetry manner are arranged on the second substrate injection molding core, an injection molding cavity of the sealing strip substrate main body is formed between the first injection molding cavity and the second injection molding cavity, and an injection molding cavity of the automobile sealing strip is formed between the first injection molding cavity and the matched molding cavity.
The design meets the synchronous molding of the pair of automobile sealing strips shown in fig. 3-5, meets the relative molding precision of the pair of automobile sealing strips, and improves the uniformity of workpieces.
In one embodiment, the first injection molding cavity 40 includes a first weatherstrip substrate molding cavity 41 for weatherstrip substrate molding and a first raised bead molding cavity 42 for raised bead molding. The second injection molding cavity comprises a second sealing strip substrate molding cavity matched with the first sealing strip substrate molding cavity and a second protruding rib molding cavity matched with the first protruding rib molding cavity, and the wrapping injection molding core comprises a wrapping injection molding cavity used for wrapping injection molding.
The structure is used for the specific molding profiling requirement of the automobile sealing strip.
In one embodiment, the substrate injection molding section 5 includes a plurality of substrate injection channels 50 disposed on the first weatherstrip substrate molding cavity. The first base plate injection molding core is provided with a central boss positioned between the two first injection molding cavities, the package glue injection part 6 comprises a central glue injection part 61 arranged on the central boss, a plurality of connected glue channels 62 distributed at intervals are arranged between the central glue injection part and any first injection molding cavity, and one side of the first glue injection molding cavity facing the central glue injection part is provided with a partition strip groove 60. The sealing part 9 is a sealing rib which is arranged on the second injection molding cavity and is used for being matched with the sealing strip groove.
The specific implementation process and principle description:
conventionally, the glue injection part is generally arranged on the first die holder and the second die holder, the first injection molding is realized through the glue injection part on the first die holder, and the second injection molding is realized through the glue injection part on the second die holder.
Therefore, the runner design is very complex, a double-side feeding structure is needed, the die cost is certainly increased, in addition, the two glue injection points are generally fed from the end side, and the deformation amount of the product after injection molding is very large.
In the present case, the mode of the substrate glue injection channel 50 is adopted, and the design of the packing part 9 and the packing strip groove 60 is utilized to form a first injection molding, the intermediate body after injection molding is located in the cavity for displacement, the intermediate body is subjected to deformation control by the injection molding cavity, then the rear end is rotated for a second injection molding, and the mode of uniformly injecting the second injection molding body between the workpieces is realized by utilizing a plurality of conjoined glue channels, so that the whole deformation is controlled, and in addition, the mode of injection molding supply with the die holder design is obviously lower in cost.
In one embodiment, the first sealing strip substrate molding cavity of the first injection molding cavity 40 is provided with a plurality of mating hole type columns for mating hole molding.
Meets the specific molding specification requirement of the matching through hole.
In a specific embodiment, the sealing strip substrate main body is provided with a flanging part, a flanging through hole is formed in the flanging part, the first substrate injection mold core is provided with a flanging molding movable mold 400 which corresponds to any first injection molding cavity one by one, and the flanging molding movable mold is provided with a flanging through hole type column for flanging through hole molding.
The forming requirements of the specific flanging part and the flanging through hole are met.
In one embodiment, alignment structures are respectively disposed between the first substrate injection mold core and the second substrate injection mold core and between the second substrate injection mold core and the encapsulation injection mold core.
The mark is omitted in the drawing, namely the traditional die assembly precision is matched with the first die holder and the second die holder, in the scheme, because the first substrate injection die core has rotary switching displacement, the design of a contraposition matching structure is adopted, the secondary contraposition die assembly precision of a switching position is met, and the forming precision of paired workpieces is ensured.
Through the description, the double-shot injection molding mold for the automobile sealing strip, disclosed by the application, meets the high-efficiency smoothness and the coordination stability of the double-shot injection station switching of the mold through the design of the ejection rotary displacement switching of the rotary base block, and greatly improves the secondary molding coordination precision. The synchronous forming requirement of the paired workpieces is met, and the relative forming precision of the paired workpieces is uniform. The double-station plastic injection molding device has the advantages that the matching design of the base plate injection molding part and the coating glue injection part is realized, the requirement of the same-side double-station plastic injection molding is met, the die cost is reduced, meanwhile, the glue injection molding is more uniform, the product injection molding deformation tolerance is reduced, and the product qualification rate is greatly improved.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus/apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus/apparatus.
Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.
Claims (5)
1. Double-colored injection moulding mould of automobile sealing strip, the automobile sealing strip includes sealing strip base plate main part and sets up the protruding rib in sealing strip base plate main part, possess the parcel injection molding body of secondary molding on the protruding rib, be equipped with a plurality of joining in marriage in the sealing strip base plate main part and connect the through-hole, its characterized in that:
the double-color injection molding mold comprises a first mold base and a second mold base which are provided with relative opening and closing displacement,
a rotary base block with 180-degree rotary displacement switching is arranged in the first die holder, two first substrate injection die cores are arranged on the rotary base block at intervals, a substrate injection part and a coating injection part are arranged on any first substrate injection die core,
the second die holder is provided with a second substrate injection cavity and a wrapping injection cavity which are arranged at intervals, the second substrate injection cavity is provided with a sealing part for sealing the wrapping injection part, an injection molding cavity of the sealing strip substrate main body is formed between the second substrate injection cavity and the first substrate injection cavity, and an injection molding cavity of the automobile sealing strip is formed between the sealing part and the first substrate injection cavity;
the rotary base block is provided with linear reciprocating displacement and self-rotation switching displacement along the mold opening and closing direction;
the first substrate injection mold core is provided with two first injection molding cavities which are arranged in a mirror symmetry manner, the package injection mold core is provided with two matched molding cavities which are arranged in a mirror symmetry manner, the second substrate injection mold core is provided with two second injection molding cavities which are arranged in a mirror symmetry manner, an injection molding cavity of the sealing strip substrate main body is formed between the first injection molding cavity and the second injection molding cavity, and an injection molding cavity of the automobile sealing strip is formed between the first injection molding cavity and the matched molding cavity;
the first injection molding cavity comprises a first sealing strip substrate molding cavity for molding the sealing strip substrate and a first protruding rib molding cavity for molding the protruding ribs,
the second injection molding cavity comprises a second sealing strip substrate molding cavity matched with the first sealing strip substrate molding cavity and a second raised rib molding cavity matched with the first raised rib molding cavity,
the wrapping injection mold core comprises a wrapping injection molding cavity for molding the wrapping injection molding;
the first substrate injection mold core is provided with a central boss positioned between the two first injection molding cavities, the package glue injection part comprises a central glue injection part arranged on the central boss, a plurality of conjoined glue channels which are distributed at intervals are arranged between the central glue injection part and any first injection molding cavity, one side of the first injection molding cavity facing the central glue injection part is provided with a partition strip groove,
the sealing part is a sealing rib which is arranged on the second injection molding cavity and is used for being matched with the sealing strip groove.
2. The two-shot injection molding die of an automotive weatherstrip according to claim 1, characterized in that:
the substrate injection molding part comprises a plurality of substrate glue injection channels arranged on the first sealing strip substrate molding cavity.
3. The two-shot injection molding die of an automotive weatherstrip according to claim 1, characterized in that:
and a plurality of matched through hole type columns for matched through hole forming are arranged on the first sealing strip substrate forming cavity of the first injection molding cavity.
4. The two-shot injection molding die of an automotive weatherstrip according to claim 1, characterized in that:
the sealing strip substrate main body is provided with a flanging part, the flanging part is provided with a flanging through hole,
the first baseplate injection molding core is provided with a flanging molding movable die which is in one-to-one correspondence with any first injection molding cavity, and the flanging molding movable die is provided with a flanging through hole type column for flanging through hole molding.
5. The two-shot injection molding die of an automotive weatherstrip according to claim 1, characterized in that: and a contraposition matching structure is respectively arranged between the first substrate injection mold core and the second substrate injection mold core and between the second substrate injection mold core and the wrapping injection mold core.
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| CN202111654363.3A CN114347378B (en) | 2021-12-31 | 2021-12-31 | Double-color injection molding mold for automobile sealing strip |
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| CN202111654363.3A CN114347378B (en) | 2021-12-31 | 2021-12-31 | Double-color injection molding mold for automobile sealing strip |
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| CN114347378B true CN114347378B (en) | 2023-09-26 |
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