CN219114668U - Knife switch valve body rubber coating mould positioning mandrel and positioning tool - Google Patents
Knife switch valve body rubber coating mould positioning mandrel and positioning tool Download PDFInfo
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- CN219114668U CN219114668U CN202320052881.6U CN202320052881U CN219114668U CN 219114668 U CN219114668 U CN 219114668U CN 202320052881 U CN202320052881 U CN 202320052881U CN 219114668 U CN219114668 U CN 219114668U
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Abstract
The utility model relates to a positioning mandrel of a knife switch valve body rubber coating die and a positioning tool implemented by using the positioning mandrel, and belongs to the technical field of injection die design. The positioning mandrel of the knife switch valve body encapsulation mold comprises a mandrel body, wherein the vertical axis of the mandrel body is used as a reference, the mandrel body comprises a lower inner wall positioning sleeve centering excircle, a knife switch valve body inner hole centering excircle and an encapsulation mold upper half mold centering excircle which are sequentially arranged from bottom to top, and the mandrel body, the lower inner wall positioning sleeve centering excircle, the knife switch valve body inner hole centering excircle and the encapsulation mold upper half mold centering excircle are coaxially arranged; the diameter of the lower inner wall positioning sleeve centering excircle is a, the diameter of the knife switch valve body inner hole centering excircle is b, the diameter of the rubber coating mold upper half mold centering excircle is c, a is less than b and less than c, and a pull rod is vertically and fixedly connected with the middle part of the upper end surface of the rubber coating mold upper half mold centering excircle. During implementation, the positioning mandrel is used for enabling the lower half mould of the encapsulation mould, the upper half mould of the encapsulation mould, the knife switch valve body and the lower inner wall positioning sleeve to establish a precise positioning relationship in advance, so that casting defects can be reduced.
Description
Technical Field
The utility model relates to a positioning mandrel of a knife switch valve body rubber coating die and a positioning tool implemented by using the positioning mandrel, and belongs to the technical field of injection die design.
Background
When the applicant receives the encapsulation of a certain type XB encapsulated knife switch valve body, the encapsulation leaks (shown as a mark A in fig. 1), the center is deviated, the wall thickness is uneven, the inner wall is not poured enough, the surface generates crack defects (shown as a mark B in fig. 1), and the product is scrapped, so that the qualification rate is low. Accordingly, there is a need for an effective improvement. Through actual inspection of the original rubber coating die and the production flow, the existing rubber coating die and knife gate valve are positioned and clamped by the position of the threaded hole (see figure 3), the rubber filling gap is inspected by eyes, and the upper die and the lower die are locked by screws after adjustment by slight knocking. Because the screw hole and the rubber-coated main hole of the knife gate valve have position errors, and the screw and the unthreaded hole have gaps, the positioning inaccuracy is obviously easy to cause after tolerance accumulation, so that the thickness of the rubber filling gap is uneven, and the method is one of main reasons for quality problems.
Disclosure of Invention
The utility model aims to provide a knife switch valve body encapsulation mold positioning mandrel capable of reducing casting defects.
The technical scheme adopted for solving the technical problems is as follows: the knife switch valve body rubber coating die positioning mandrel comprises a mandrel body, wherein the mandrel body is vertically arranged by taking the axis of the mandrel body as a reference, and comprises a lower inner wall positioning sleeve centering excircle, a knife switch valve body inner hole centering excircle and a rubber coating die upper half die centering excircle which are sequentially arranged from bottom to top, and the mandrel body, the knife switch valve body inner hole centering excircle and the rubber coating die upper half die centering excircle are coaxially arranged; the diameter of the lower inner wall positioning sleeve centering excircle is a, the diameter of the knife switch valve body inner hole centering excircle is b, the diameter of the rubber coating mold upper half mold centering excircle is c, a is less than b and less than c, and a pull rod is vertically and fixedly connected with the middle part of the upper end surface of the rubber coating mold upper half mold centering excircle.
For convenient operation, the preferable scheme is as follows: the pull rod is coaxial with the upper half mould centering excircle of the encapsulation mould.
For convenient processing and operation, the preferable scheme is as follows: the pull rod adopts circular section, and the surface of pull rod is provided with anti-skidding structure.
On the basis of the knife switch valve body encapsulation mold positioning mandrel, the utility model also provides the knife switch valve body encapsulation mold positioning tool capable of reducing casting defects. The specific technical scheme is as follows: including coaxial rubber coating mould lower half mould, rubber coating mould upper half mould, knife switch valve body and the lower inner wall locating sleeve that sets up, rubber coating mould lower half mould, knife switch valve body and rubber coating mould upper half mould from bottom to top set gradually, lower inner wall locating sleeve sets up in the location tang of rubber coating mould lower half mould up end, rubber coating mould lower half mould is connected through first screw with the knife switch valve body, rubber coating mould upper half mould is connected through the second screw with the knife switch valve body, the center through hole interpolation of rubber coating mould upper half mould is equipped with foretell knife switch valve body rubber coating mould location dabber, the lower inner wall locating sleeve centering excircle of dabber body cooperatees with the center through-hole of lower inner wall locating sleeve, knife switch valve body hole centering excircle cooperatees with the center through-hole of knife switch valve body, rubber coating mould upper half mould centering excircle cooperatees with the center through-hole of rubber coating mould upper half mould.
Further is: the lower end face of the upper half die centering excircle of the encapsulation die is contacted with the corresponding end face of the knife switch valve body.
Further is: the lower inner wall locating sleeve and the lower half mould of the rubber coating mould are of an integrated structure.
Further is: the flatness of the sealing surface between the upper end sealing ring belt of the knife switch valve body and the upper half mould of the encapsulation mould is less than 0.05mm, and the flatness of the sealing surface between the lower end sealing ring belt of the knife switch valve body and the lower half mould of the encapsulation mould is less than 0.05mm.
Further is: the upper end sealing ring belt width of the knife switch valve body is 3mm to 4mm, and the lower end sealing ring belt width of the knife switch valve body is 3mm to 4mm.
The beneficial effects of the utility model are as follows: when the method is implemented, the precise positioning relation is established among the lower half mould of the rubber coating mould, the upper half mould of the rubber coating mould, the knife gate valve body and the lower inner wall positioning sleeve through the positioning mandrel of the rubber coating mould of the knife gate valve body in advance, then the positioning mandrel is pulled out upwards, and finally the central positioning pin, the upper inner wall positioning sleeve and the flashboard simulator are continuously assembled according to the conventional mould structure. According to the utility model, by improving the positioning mode of the rubber coating die, the die can be accurately positioned, concentricity of the rubber coating die and the rubber coating main body is ensured, the wall thickness is ensured to be uniform, the defect that the inner wall is insufficiently poured and the surface is cracked is avoided; meanwhile, the flatness of the sealing surface and the width of the sealing ring belt are reasonably limited, so that the sealing surface can be tightly attached to the die, and sealing is realized without leakage.
Drawings
FIG. 1 is a semi-sectional view of a knife gate valve body encapsulated defect display in accordance with the prior art;
FIG. 2 is a cross-sectional view of a knife gate valve body encapsulation according to the present utility model;
FIG. 3 is a schematic diagram of a master mold assembly for knife gate valve body encapsulation in accordance with the present utility model;
FIG. 4 is a three-dimensional view of a positioning mandrel in accordance with the present utility model;
FIG. 5 is an exploded view of a mold positioning tool according to the present utility model;
FIG. 6 is a cross-sectional view of the mold positioning assembly according to the present utility model;
FIG. 7 is an exploded view of a mold according to the present utility model;
fig. 8 is a cross-sectional view of a die paste according to the present utility model.
Marked in the figure as:
in fig. 1: a, a glue leakage part; b-under-cast, crack areas;
in fig. 2: 11-sealing ring belt one of knife switch valve body; 12-sealing ring belt II of knife switch valve body; 21-an encapsulated inner hole matrix I of a knife switch valve body; 22-an encapsulated inner bore matrix 2 of a knife gate valve body; the sealing annulus width dimension of the M-knife valve body; the thickness dimension of the encapsulation of the inner wall of the encapsulation hole of the N-knife switch valve body.
Fig. 3 to 8: 301-lower half mould of encapsulation mould; 302-an encapsulation mold upper half; 303-knife gate valve body; 304-a lower inner wall positioning sleeve; 305-first screw; 306-a second screw; 307-lower mold half sealing surface; 308-upper mold half sealing surface; 309-locating holes; 310-positioning and compacting a movable die; 311-rubber-coated bottom hole of knife switch valve body; 312-centering pins; 313-upper inner wall locating sleeve; 314-a shutter simulator; 501-centering the outer circle of the lower inner wall positioning sleeve; 502-centering the outer circle of the inner hole of the knife switch valve body; 503-centering an outer circle on an upper half mould of the encapsulation mould; 504-tie rod.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Referring to fig. 2, the present utility model is applicable to the encapsulation of knife gate valve body inner cavity sealing surfaces. The conventional mold structure is shown in fig. 3, and comprises a lower mold half 301 of a rubber coating mold, an upper mold half 302 of the rubber coating mold, a knife gate valve body 303, a positioning and pressing movable mold 310, a central positioning pin 312, an upper inner wall positioning sleeve 313 and a lower inner wall positioning sleeve 304 which are coaxially arranged, wherein the lower mold half 301 of the rubber coating mold, the knife gate valve body 303 and the upper mold half 302 of the rubber coating mold are sequentially arranged from bottom to top, and form a cavity of the rubber coating mold in a matched manner, the upper inner wall positioning sleeve 313, the lower inner wall positioning sleeve 304 and a flashboard simulator 314 together, the lower mold half 301 of the rubber coating mold is connected with the knife gate valve body 303 through a first screw 305, and the upper mold half 302 of the rubber coating mold is connected with the knife gate valve body 303 through a second screw 306 to fix the mold into a whole.
The main structure of the die is the same as that of the prior art, and the key point is that a knife gate valve body rubber coating die positioning mandrel is specially designed in the assembly process, and referring to fig. 4, the die comprises a mandrel body, wherein the mandrel body comprises a lower inner wall positioning sleeve centering excircle 501, a knife gate valve body inner hole centering excircle 502 and a rubber coating die upper half die centering excircle 503 which are sequentially arranged from bottom to top by taking the vertical arrangement of the mandrel body axis as a reference, and the mandrel body is coaxially arranged; the diameter of the lower inner wall positioning sleeve centering excircle 501 is a, the diameter of the knife switch valve body inner hole centering excircle 502 is b, the diameter of the rubber coating mold upper half mold centering excircle 503 is c, a is less than b and less than c, and the middle part of the upper end surface of the rubber coating mold upper half mold centering excircle 503 is vertically and fixedly connected with a pull rod 504.
Referring to fig. 4 to 6, in the specific assembly, the lower half 301 of the encapsulation mold, the upper half 302 of the encapsulation mold, the knife switch valve 303, the lower inner wall positioning sleeve 304 and the positioning mandrel of the encapsulation mold of the knife switch valve are assembled into a whole. The method comprises the following specific steps: the lower inner wall positioning sleeve 304 is put into the lower half mold 301 of the encapsulation mold to be assembled (or made into a whole), then the knife switch valve body 303 is sleeved on the outer circle of the lower inner wall positioning sleeve 304, the centers of the lower half mold 301 of the encapsulation mold and the knife switch valve body 303 are reliably fixed by a positioning mandrel through a centering outer circle (the lower inner wall positioning sleeve centering outer circle 501 and the knife switch valve body inner hole centering outer circle 502), the knife switch valve body 303 and the lower half mold 301 of the encapsulation mold are further fixed into a whole by a first screw 305, the outer circle (the upper half mold centering outer circle 503 of the encapsulation mold) of the positioning mandrel is sleeved on the upper half mold 302 of the encapsulation mold to form a positioning relationship, then the upper half mold 301 of the encapsulation mold is connected and pressed on the knife switch valve body 303 by a second screw 306, so that the accurate positioning of the mold is realized, and then the positioning mandrel can be pulled upwards through a pull rod 504.
Referring to fig. 7, 8 and 3, after the positioning mandrel is withdrawn, the gate simulator 314 may be inserted with reference to a conventional mold structure, the center positioning pin 312 may be inserted, and the upper inner wall positioning sleeve 313 may be fitted. The mold can then be preheated according to the encapsulation process flow.
After the mold is preheated, the heated, mixed and stirred glue solution is quickly poured into an annular groove surrounded by the upper half mold 302 and the upper inner wall positioning sleeve 313 of the encapsulation mold. After the annular groove is full, when glue solution flows out from the small holes on the end face of the flashboard simulation body 314, the glue solution is placed into the positioning and pressing movable mould 310, and finally the whole mould is moved into the vulcanizing machine, the positioning and pressing movable mould 310 is extruded, and the machine is stabilized for 10 minutes.
After the above steps are completed, the parts are disassembled on the valve in the reverse order of the assembly order, so that the encapsulation process is completed.
The utility model has simple structure and application method, can be applied to the mold encapsulation design of the thin-wall encapsulation piece, reduces encapsulation defects caused by unreasonable design of the positioning structure, and provides a usable scheme for improving the quality of the encapsulation piece.
For convenient operation, the preferable scheme is as follows: the tie rod 504 is coaxial with the centering outer circle 503 of the upper mold half of the encapsulation mold. For easy processing and manufacturing and effective coaxiality guarantee, the pull rod 504 and the mandrel body are preferably of an integrated structure.
For convenient processing and operation, the preferable scheme is as follows: the pull rod 504 adopts a circular cross section, and the outer surface of the pull rod 504 is provided with an anti-slip structure. The anti-skid structure can be various anti-skid treatment coatings, patterns and the like, and also can be an independently arranged anti-skid handle.
During assembly, the positioning mandrel can utilize the lower end face or any one step face to realize axial positioning, and the preferable scheme is that the lower end face of the upper half die centering excircle 503 of the encapsulation die is utilized to realize axial positioning, namely: the lower end surface of the centering outer circle 503 of the upper half mold of the encapsulation mold is in contact with the corresponding end surface of the knife switch valve body 303.
In order to ensure reliable sealing and further improve encapsulation quality, the utility model increases the flatness requirement of the sealing surface, and specifically comprises the following steps: the flatness of the sealing surface between the upper end sealing ring belt of the knife gate valve body 303 and the upper half mold 302 of the encapsulation mold is less than 0.05mm, and the flatness of the sealing surface between the lower end sealing ring belt of the knife gate valve body 303 and the lower half mold 301 of the encapsulation mold is less than 0.05mm.
In order to ensure reliable sealing, the utility model also optimally designs the width dimension of the sealing ring belt, and in the conventional die structure scheme, the width dimension of the sealing ring belt (see the mark M in fig. 2) is generally designed to be 2mm, the width of the sealing ring belt at the upper end of the knife switch valve body 303 is 3mm to 4mm, and the width of the sealing ring belt at the lower end of the knife switch valve body 303 is 3mm to 4mm.
When the utility model is implemented, the positioning is accurate, the wall thickness of the rubber coating is uniform, meanwhile, the problems of leakage and center deviation of the rubber coating are avoided, the insufficient inner wall casting is not existed, and the surface crack defect is not generated, so that the qualification rate of the rubber coating is improved.
Claims (8)
1. Knife switch valve body rubber coating mould location dabber, including dabber body, its characterized in that: taking the vertical arrangement of the axis of the mandrel body as a reference, the mandrel body comprises a lower inner wall positioning sleeve centering excircle (501), a knife switch valve body inner hole centering excircle (502) and an encapsulation mold upper half mold centering excircle (503) which are sequentially arranged from bottom to top, and the three are coaxially arranged; the diameter of the lower inner wall positioning sleeve centering excircle (501) is a, the diameter of the inner hole centering excircle (502) of the knife switch valve body is b, the diameter of the upper half mold centering excircle (503) of the encapsulation mold is c, a is less than b and less than c, and a pull rod (504) is vertically and fixedly connected with the middle part of the upper end surface of the upper half mold centering excircle (503) of the encapsulation mold.
2. The knife gate valve body encapsulation mold positioning mandrel of claim 1, wherein: the pull rod (504) is coaxial with the upper half-mould centering excircle (503) of the encapsulation mould.
3. The knife gate valve body encapsulation mold positioning mandrel of claim 1, wherein: the pull rod (504) adopts a round section, and an anti-slip structure is arranged on the outer surface of the pull rod (504).
4. Knife switch valve body rubber coating mould location frock, including rubber coating mould hypomere (301), rubber coating mould epirelief mould (302), knife switch valve body (303) and lower inner wall spacer sleeve (304) of coaxial setting, rubber coating mould hypomere (301), knife switch valve body (303) and rubber coating mould epirelief mould (302) are from bottom to top set gradually, lower inner wall spacer sleeve (304) set up in rubber coating mould hypomere (301) up end's location tang, rubber coating mould hypomere (301) are connected through first screw (305) with knife switch valve body (303), rubber coating mould epirelief mould (302) are connected through second screw (306) with knife switch valve body (303), its characterized in that: a knife gate valve body rubber-coating mold positioning mandrel as claimed in any one of claims 1 to 3 is inserted into a central through hole of an upper mold half (302) of the rubber-coating mold, a lower inner wall positioning sleeve centering excircle (501) of the mandrel body is matched with a central through hole of a lower inner wall positioning sleeve (304), a knife gate valve body inner hole centering excircle (502) is matched with a central through hole of a knife gate valve body (303), and a rubber-coating mold upper mold half centering excircle (503) is matched with a central through hole of the upper mold half (302) of the rubber-coating mold.
5. The knife gate valve body encapsulation mold positioning tooling of claim 4, wherein: the lower end face of the upper half centering excircle (503) of the encapsulation mold is contacted with the corresponding end face of the knife switch valve body (303).
6. The knife gate valve body encapsulation mold positioning tooling of claim 4, wherein: the lower inner wall positioning sleeve (304) and the lower half mould (301) of the encapsulation mould are of an integrated structure.
7. The knife gate valve body encapsulation mold positioning tooling of claim 4, wherein: the flatness of the sealing surface between the upper end sealing ring belt of the knife switch valve body (303) and the upper half mould (302) of the encapsulation mould is smaller than 0.05mm, and the flatness of the sealing surface between the lower end sealing ring belt of the knife switch valve body (303) and the lower half mould (301) of the encapsulation mould is smaller than 0.05mm.
8. The knife gate valve body encapsulation mold positioning tooling of claim 4, wherein: the upper end sealing ring belt width of the knife switch valve body (303) is 3mm to 4mm, and the lower end sealing ring belt width of the knife switch valve body (303) is 3mm to 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320052881.6U CN219114668U (en) | 2023-01-09 | 2023-01-09 | Knife switch valve body rubber coating mould positioning mandrel and positioning tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320052881.6U CN219114668U (en) | 2023-01-09 | 2023-01-09 | Knife switch valve body rubber coating mould positioning mandrel and positioning tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219114668U true CN219114668U (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320052881.6U Active CN219114668U (en) | 2023-01-09 | 2023-01-09 | Knife switch valve body rubber coating mould positioning mandrel and positioning tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219114668U (en) |
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2023
- 2023-01-09 CN CN202320052881.6U patent/CN219114668U/en active Active
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