CN109501117A - A kind of high performance water proof sealing ring and its manufacture craft - Google Patents

A kind of high performance water proof sealing ring and its manufacture craft Download PDF

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Publication number
CN109501117A
CN109501117A CN201811471389.2A CN201811471389A CN109501117A CN 109501117 A CN109501117 A CN 109501117A CN 201811471389 A CN201811471389 A CN 201811471389A CN 109501117 A CN109501117 A CN 109501117A
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CN
China
Prior art keywords
sealing ring
head
injection molding
dynamic
water proof
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Granted
Application number
CN201811471389.2A
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Chinese (zh)
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CN109501117B (en
Inventor
崔树龙
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XUANCHENG ANAN RUBBER & PLASTIC PARTS MANUFACTURE Co.,Ltd.
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崔树龙
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Priority to CN201811471389.2A priority Critical patent/CN109501117B/en
Publication of CN109501117A publication Critical patent/CN109501117A/en
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Publication of CN109501117B publication Critical patent/CN109501117B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/1769Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/27Sprue channels Runner channels or runner nozzles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/26Sealing devices, e.g. packaging for pistons or pipe joints
    • B29L2031/265Packings, Gaskets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/34Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/36Plugs, connectors, or parts thereof

Abstract

The invention discloses a kind of high performance water proof sealing ring and its manufacture crafts, belong to sealing ring production field, a kind of high performance water proof sealing ring, including the gyroscope type sealing ring being set in PIN needle, its manufacture craft includes: the first step, prepare, PIN needle lower end is perpendicularly fixed at bottom end in mold, PIN needle is connected with connection ring far from one end of die end;Second step, die closing is molded for the first time, and side is molded to mould inside from mold;Third step is opened for the first time, is adjusted mold, is adjusted the process of mold are as follows: remove connection ring, double end bearing piece is connected between cover half and dynamic model;4th step, secondary die closing injection molding, side is molded to mould inside from mold again;5th step, twice-die-opening, and clear up extra sealing material corner; manufacture craft of the invention may be implemented for sealing ring to be integrally combined on injection molding block and PIN needle; good airproof performance, and the infiltration of moisture can be effectively obstructed, protect PIN needle and charging connector internal component.

Description

A kind of high performance water proof sealing ring and its manufacture craft
Technical field
The present invention relates to sealing ring production fields, more specifically to a kind of high performance water proof sealing ring and its production Technique.
Background technique
Currently, in the electronic components such as automobile sensor, electronic actuators circuit board and chip connection packaged type master There are injection molding type and two kinds of assembled.Injection molding type packaged type be by circuit board, chip and patch PIN needle or with comprising plug Harness link together to be fixed on primary injection molding block and form injection moulded components, it is complete then to pass through secondary injection molding again Electronic product.
This molding mode since quadric injection mould pressure is big, temperature is high, so circuit board, chip and patch PIN needle or Harness is difficult to be securely fixed on primary injection molding block, causes assembling leakproofness after PIN needle poor, can be carried out at this time with sealing ring auxiliary Sealing is helped, to guarantee its sealing performance, but existing sealing ring poor waterproof properties can damage PIN needle root once meeting water infiltration Portion and charging connector internal component.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a kind of high performance water proof sealing ring and its Manufacture craft, sealing ring can be integrally combined on injection molding block and PIN needle by it, good airproof performance, and can effectively obstruct water PIN needle and charging connector internal component are protected in the infiltration divided.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of high performance water proof sealing ring, including the gyroscope type sealing ring being set in PIN needle, manufacture craft includes:
The first step prepares, and PIN needle lower end is perpendicularly fixed at bottom end in mold, the PIN needle far from die end one End is connected with connection ring;
Second step, die closing is molded for the first time, and side is molded to mould inside from mold;
Third step is opened for the first time, adjusts mold;
4th step, secondary die closing injection molding, side is molded to mould inside from mold again;
5th step, twice-die-opening, and clear up extra sealing material corner.
Sealing ring can be integrally combined on injection molding block and PIN needle, good airproof performance, and can effectively obstruct moisture It penetrates into, protects PIN needle and charging connector internal component.
Further, the mold includes that upper end cutting has the cover half of the first type chamber and lower end cutting to have the dynamic of second type chamber Mould, the PIN needle are uniformly connected to the interior bottom end of the first type chamber, and the dynamic model upper end is fixedly connected with injecting head, the injection molding Head is dug from top to bottom injection hole, and digging on the dynamic model has injection channel, and injection channel connection injection hole and second type The inner roof wall cutting of chamber, the second type chamber has multiple third type chambers, and multiple third type chambers end with multiple PIN needles respectively Match, the opening cutting of the third type chamber has annular groove, and annular groove is connected with third type chamber.
Further, the injection channel includes injection molding main channel and multiple injection molding subchannels, and the injection molding main channel is horizontal To being arranged and being connected with injection hole, multiple injection molding subchannel connections are molded main channels and second type chamber, and multiple injection moldings Subchannel is arranged in the two sides of third type chamber, and multiple injection molding subchannels are conducive to uniformly be molded, will not because one direction be molded when Extruding force causes the loosening of PIN needle.
Further, the injecting head is located at the center of second type chamber upper end, guarantees that each injection molding subchannel is infused simultaneously Enter filler, injection hole 7 is up big and down small funnel shaped, and injection molding effect is good.
Further, the cover half, dynamic model and injection molding head surface pass through polishing treatment, and surface is smooth, not easy to wear, move Mould and injecting head upper end four corners are polished round and smooth, are not easy to scratch operator.
Further, double end bearing piece is equipped between the cover half and dynamic model, the double end bearing piece includes bearing piece body, first Head and second head, first head and second head be respectively fixedly connected with bearing piece body upper and lower ends, the dynamic model is separate One end of injecting head, which is dug, card slot, and first head matches with card slot, and the cover half upper end, which is equally dug, card slot, institute It states second head to match with the card slot on cover half, will separate between cover half and dynamic model using double end bearing piece has certain interval, makes The sealing material for obtaining quadric injection mould smoothly fills up annular groove.
Further, in the third step, the process of mold is adjusted are as follows: remove connection ring, it is fixed that double end bearing piece is connected to Between mould and dynamic model, being mutually clamped on first head with the card slot on dynamic model mutually blocks second head with the card slot on cover half It connects, after removing connection ring, then vacates the gap of connection ring-shaped, the preforming shape of sealing ring is collectively formed in the gap and annular groove.
Further, the connection ring is reversed convex type shape, and the upper surface of connection ring matches with annular groove, it is ensured that first The material of secondary injection molding will not enter annular groove.
Further, the making material of the sealing ring includes TPU, TPE, silica gel, fluorine silicone rubber, fluorubber and NBR, institute It states TPU, TPE, silica gel, fluorine silicone rubber, fluorubber and NBR and carries out mixed injection molding according to the ratio of 2:3:3:2:1:5, and be molded into Type temperature is 65-80 DEG C, and above-mentioned material cooperates, and sealing effect can be performed to optimum state.
Further, the sealing ring surface coats reactive pattern acrylic resin waterproof paint, and waterproof performance is excellent.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) sealing ring can be integrally combined on injection molding block and PIN needle by this programme, good airproof performance, and can be effective The infiltration of moisture is obstructed, PIN needle and charging connector internal component are protected.
(2) injection channel includes injection molding main channel and multiple injection molding subchannels, injection molding main channel laterally setting and with injection molding Mouth is connected, multiple injection molding subchannels connections injection molding main channel and second type chamber, and multiple injection molding subchannels are arranged in third type The two sides of chamber, multiple injection molding subchannels are conducive to uniformly be molded, will not be because of the pine of PIN needle caused by extruding force when one direction is molded It is dynamic.
(3) injecting head is located at the center of second type chamber upper end, guarantees that filler is injected simultaneously in each injection molding subchannel, is molded Mouth 7 is up big and down small funnel shaped, and injection molding effect is good.
(4) cover half, dynamic model and injection molding head surface pass through polishing treatment, and surface is smooth, not easy to wear, dynamic model and injecting head Upper end four corners are polished round and smooth, are not easy to scratch operator.
(5) double end bearing piece is equipped between cover half and dynamic model, double end bearing piece includes bearing piece body, first head and second head, First head and second head, which are respectively fixedly connected with, has card far from one end cutting of injecting head with bearing piece body upper and lower ends, dynamic model Slot, first head match with card slot, and cover half upper end, which is equally dug, card slot, and second head matches with the card slot on cover half, To be separated between cover half and dynamic model using double end bearing piece has certain interval, so that the sealing material of quadric injection mould smoothly fills up annular Slot.
(6) in third step, adjust the process of mold are as follows: remove connection ring, by double end bearing piece be connected to cover half and dynamic model it Between, by being mutually clamped with the card slot on dynamic model on first head, second head is mutually clamped with the card slot on cover half, removes connection After ring, then the gap of connection ring-shaped is vacated, the preforming shape of sealing ring is collectively formed in the gap and annular groove.
(7) connection ring is reversed convex type shape, and the upper surface of connection ring matches with annular groove, it is ensured that the object being molded for the first time Material will not enter annular groove.
(8) making material of sealing ring includes TPU, TPE, silica gel, fluorine silicone rubber, fluorubber and NBR, TPU, TPE, silicon Glue, fluorine silicone rubber, fluorubber and NBR carry out mixed injection molding according to the ratio of 2:3:3:2:1:5, and injection molding temperature is 65- 80 DEG C, above-mentioned material cooperates, and sealing effect can be performed to optimum state.
(9) sealing ring surface coats reactive pattern acrylic resin waterproof paint, and waterproof performance is excellent.
Detailed description of the invention
Fig. 1 is the perspective view of dynamic model of the invention;
Structural schematic diagram when Fig. 2 is present invention die closing injection molding for the first time;
Fig. 3 is the structural schematic diagram in Fig. 2 at A;
Structural schematic diagram when Fig. 4 is secondary die closing injection molding of the invention;
Fig. 5 is the structural schematic diagram in Fig. 4 at B;
Fig. 6 is the structural schematic diagram in Fig. 5 under sealing ring completed state;
Fig. 7 is the structural schematic diagram of double end bearing piece of the invention;
Fig. 8 is technical process figure of the invention.
Figure label explanation:
1 cover half, 2 dynamic models, 3 first type chambers, 4 second type chambers, 5 injecting heads, 6PIN needle, 7 injection holes, 8 injection molding main channels, 9 Be molded subchannel, 10 third type chambers, 11 connection rings, 12 annular grooves, 13 double end bearing pieces, 1301 bearing piece bodies, 1,302 first heads, 1303 second heads, 14 card slots, 15 sealing rings.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description;Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end " Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand For indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set Be equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removable Connection is unloaded, or is integrally connected;It can be mechanical connection, be also possible to be electrically connected;It can be directly connected, it can also be in Between medium be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be specific Situation understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1:
Referring to Fig. 8, a kind of high performance water proof sealing ring, including the gyroscope type sealing ring 15 being set in PIN needle 6, Manufacture craft includes:
The first step prepares, 6 lower end of PIN needle is perpendicularly fixed at bottom end in mold, the one end of PIN needle 6 far from die end It is connected with connection ring 11;
Second step, die closing is molded for the first time, and side is molded to mould inside from mold;
Third step is opened for the first time, adjusts mold;
4th step, secondary die closing injection molding, side is molded to mould inside from mold again;
5th step, twice-die-opening, and clear up extra sealing material corner.
Sealing ring 15 can be integrally combined on injection molding block and PIN needle 6, good airproof performance, and can effectively obstruct water PIN needle 6 and charging connector internal component are protected in the infiltration divided.
Fig. 1 and Fig. 2 are please referred to, mold includes that upper end cutting has the cover half 1 of the first type chamber 3 and lower end cutting to have second type chamber 4 dynamic model 2, PIN needle 6 are uniformly connected to the interior bottom end of the first type chamber 3, and 2 upper end of dynamic model is fixedly connected with injecting head 5, injecting head 5 Digging from top to bottom has injection hole 7, and digging on dynamic model 2 has injection channel, and injection channel connection injection hole 7 and second type chamber 4, Referring to Fig. 3, the inner roof wall cutting of second type chamber 4 has multiple third type chambers 10, and multiple third type chambers 10 respectively with multiple PIN The end of needle 6 matches, and the opening cutting of third type chamber 10 has annular groove 12, and annular groove 12 is connected with third type chamber 10 It is logical.
Fig. 2 and Fig. 4 are please referred to, injection channel includes injection molding main channel 8 and multiple injection molding subchannels 9, and injection molding main channel 8 is horizontal To being arranged and being connected with injection hole 7, multiple connections of injection molding subchannel 9 are molded main channel 8 and second type chamber 4, and multiple injection moldings Subchannel 9 is arranged in the two sides of third type chamber 10, and multiple injection molding subchannels 9 are conducive to uniformly be molded, will not be molded because of one direction When extruding force cause the loosening of PIN needle 6.
Fig. 2 and Fig. 4 are please referred to, injecting head 5 is located at the center of 4 upper end of second type chamber, guarantees that each injection molding subchannel 9 is same When inject filler, injection hole 7 is up big and down small funnel shaped, and injection molding effect is good.
Polishing treatment is passed through on cover half 1, dynamic model 2 and 5 surface of injecting head, and surface is smooth, not easy to wear, dynamic model 2 and injection molding First 5 upper end four corners are polished round and smooth, are not easy to scratch operator.
Fig. 4 and Fig. 7 are please referred to, double end bearing piece 13 is equipped between cover half 1 and dynamic model 2, double end bearing piece 13 includes bearing piece body 1301, first head 1302 and second head 1303, first head 1302 and second head 1303 is respectively fixedly connected with and bearing piece 1301 upper and lower ends of body, dynamic model 2 is dug far from one end of injecting head 5 card slot 14, and first head 1302 matches with card slot 14, 1 upper end of cover half, which is equally dug, card slot 14, and second head 1303 matches with the card slot 14 on cover half 1, utilizes double end bearing piece 13 There is certain interval for separating between cover half 1 and dynamic model 2, so that the sealing material of quadric injection mould smoothly fills up annular groove 12.
In third step, the process of mold is adjusted are as follows: remove connection ring 11, double end bearing piece 13 is connected to cover half 1 and dynamic model 2 Between, by being clamped with 14 phase of card slot on dynamic model 2 on first head 1302, by the card slot on second head 1303 and cover half 1 The clamping of 14 phases, after removing connection ring 11, then vacates the gap of 11 shape of connection ring, referring to Fig. 6, the gap and annular groove 12 are total With the formation preforming shape of sealing ring 15.
Referring to Fig. 3, connection ring 11 is reversed convex type shape, and the upper surface of connection ring 11 matches with annular groove 12, can protect Annular groove 12 will not be entered by demonstrate,proving the material being molded for the first time.
The making material of sealing ring 15 includes TPU, TPE, silica gel, fluorine silicone rubber, fluorubber and NBR, TPU, TPE, silica gel, Fluorine silicone rubber, fluorubber and NBR carry out mixed injection molding according to the ratio of 2:3:3:2:1:5, and injection molding temperature is 65-80 DEG C, above-mentioned material cooperates, and sealing effect can be performed to optimum state.
15 surface of sealing ring coats reactive pattern acrylic resin waterproof paint, and waterproof performance is excellent.
Referring to Fig. 8, a kind of high performance water proof sealing ring, manufacture craft include:
The first step prepares, 6 lower end of PIN needle is perpendicularly fixed at bottom end in mold, the one end of PIN needle 6 far from die end It is connected with connection ring 11;
Second step, die closing is molded for the first time, and side is molded to mould inside from mold;
Third step is opened for the first time, is adjusted mold, is adjusted the process of mold are as follows: remove connection ring 11, double end bearing piece 13 is connected It is connected between cover half 1 and dynamic model 2, by being clamped with 14 phase of card slot on dynamic model 2 on first head 1302, by second head 1303 It is clamped with 14 phase of card slot on cover half 1, after removing connection ring 11, then vacates the gap of 11 shape of connection ring, the gap and annular The preforming shape of sealing ring 15 is collectively formed in slot 12;
4th step, secondary die closing injection molding, side is molded to mould inside from mold again;
5th step, twice-die-opening, after die sinking, suitable scraper can be used to strike off 6 end of PIN needle for those skilled in the art Extra burr.
The foregoing is intended to be a preferred embodiment of the present invention;But scope of protection of the present invention is not limited thereto. Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its It improves design and is subject to equivalent substitution or change, should be covered by the scope of protection of the present invention.

Claims (10)

1. a kind of high performance water proof sealing ring, it is characterised in that: including the gyroscope type sealing ring (15) being set on PIN needle (6), Its manufacture craft includes:
The first step prepares, and PIN needle (6) lower end is perpendicularly fixed at bottom end in mold, the PIN needle (6) is far from die end One end is connected with connection ring (11);
Second step, die closing is molded for the first time, and side is molded to mould inside from mold;
Third step is opened for the first time, adjusts mold;
4th step, secondary die closing injection molding, side is molded to mould inside from mold again;
5th step, twice-die-opening, and clear up extra sealing material corner.
2. a kind of high performance water proof sealing ring according to claim 1 and its manufacture craft, it is characterised in that: the mold The cover half (1) for having the first type chamber (3) is dug including upper end and the dynamic model (2) for there are second type chamber (4), the PIN needle are dug in lower end (6) it is uniformly connected to the interior bottom end of the first type chamber (3), dynamic model (2) upper end is fixedly connected with injecting head (5), the injection molding Head (5) is dug from top to bottom to be had injection hole (7), and digging on the dynamic model (2) has injection channel, and injection channel is connected to injection hole (7) with second type chamber (4), the inner roof wall of the second type chamber (4), which is dug, multiple third type chambers (10), and multiple third type chambers (10) end respectively with multiple PIN needles (6) matches, and the opening cutting of the third type chamber (10) has annular groove (12), And annular groove (12) is connected with third type chamber (10).
3. a kind of high performance water proof sealing ring according to claim 2 and its manufacture craft, it is characterised in that: the injection molding Channel includes injection molding main channel (8) and multiple injection molding subchannels (9), and the injection molding main channel (8) is laterally arranged and and injection hole (7) it is connected, multiple injection molding subchannel (9) connection injection moldings main channel (8) and second type chamber (4), and multiple injection moldings branch is logical Road (9) is arranged in the two sides of third type chamber (10).
4. a kind of high performance water proof sealing ring according to claim 2 and its manufacture craft, it is characterised in that: the injection molding Head (5) is located at the center of second type chamber (4) upper end, and the injection hole (7) is up big and down small funnel shaped.
5. a kind of high performance water proof sealing ring according to claim 2 and its manufacture craft, it is characterised in that: the cover half (1), polishing treatment is passed through on dynamic model (2) and injecting head (5) surface, and the dynamic model (2) and injecting head (5) upper end four corners connect It is connected to polishing layer.
6. a kind of high performance water proof sealing ring according to claim 2 and its manufacture craft, it is characterised in that: the cover half (1) double end bearing piece (13) are equipped between dynamic model (2), the double end bearing piece (13) includes bearing piece body (1301), first head (1302) it is respectively fixedly connected with and bearing piece body with second head (1303), first head (1302) and second head (1303) (1301) upper and lower ends, the dynamic model (2) is dug far from the one end of injecting head (5) to be had card slot (14), first head (1302) match with card slot (14), cover half (1) upper end, which is equally dug, to be had card slot (14), second head (1303) with Card slot (14) on cover half (1) matches.
7. a kind of high performance water proof sealing ring according to claim 1 or 6 and its manufacture craft, it is characterised in that: described In third step, the process of mold is adjusted are as follows: remove connection ring (11), double end bearing piece (13) is connected to cover half (1) and dynamic model (2) Between, by being mutually clamped with the card slot (14) on dynamic model (2) on first head (1302), by second head (1303) and cover half (1) card slot (14) on is mutually clamped.
8. a kind of high performance water proof sealing ring according to claim 7 and its manufacture craft, it is characterised in that: the connection Ring (11) is reversed convex type shape, and the upper surface of connection ring (11) matches with annular groove (12).
9. a kind of high performance water proof sealing ring according to claim 1 and its manufacture craft, it is characterised in that: the sealing The making material for enclosing (15) includes TPU, TPE, silica gel, fluorine silicone rubber, fluorubber and NBR, the TPU, TPE, silica gel, fluorine silicon rubber Glue, fluorubber and NBR carry out mixed injection molding according to the ratio of 2:3:3:2:1:5, and injection molding temperature is 65-80 DEG C.
10. a kind of high performance water proof sealing ring according to claim 9 and its manufacture craft, it is characterised in that: described close Seal (15) surface coats reactive pattern acrylic resin waterproof paint.
CN201811471389.2A 2018-12-04 2018-12-04 High-performance waterproof sealing ring and manufacturing process thereof Active CN109501117B (en)

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JPH06262656A (en) * 1993-03-15 1994-09-20 Kansei Corp Multilayer injection press molding apparatus
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