A kind of vehicle firewall wire harness sheath and its coating technique
Technical field
The present invention relates to auto parts and components fields, are related specifically to a kind of vehicle firewall wire harness sheath.
Background technology
Fire wall metal plate is equipped between automobile engine nacelle and passenger compartment, engine wiring harness needs to reach through the metal plate
Interior, if not taking any safeguard procedures, harness can be worn by metal plate sharp edge, influence vehicle security and function it is reliable
Property.Existing routine techniques is the perforate on fire wall metal plate, and one is then covered on harness by rubber external member and plastics bone
The sheath of frame composition can meet protection wire, sound-insulating and heat-insulating, water proof and dust proof, the requirement of cut-protection abrasion substantially.
Such as in the Chinese patent application of Application No. 2013208005262, a kind of " wire harness sealing piece " is disclosed, including
The rubber parts and the plastic base of periphery passed through for harness is provided with elastic packing frame, the plastics base on the plastic base
Seat is contacted by the elastic packing frame with the fire wall.
In above-mentioned fire wall wire harness sheath or sealing element, shrink-fit structure is generally between rubber parts and plastic skeleton,
Sealing performance can gradually weaken or even can generate the phenomenon that rubber parts comes off as the time elapses.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of vehicle firewall wire harness sheaths, eliminate harness in the prior art
The phenomenon that rubber parts and plastic skeleton of sheath come off.
The technical solution adopted by the present invention to solve the technical problems is a kind of vehicle firewall wire harness sheath, including rubber
Part and plastic skeleton, rubber parts include main casing and auxiliary set pipe.Rubber parts in plastic skeleton one side, plastic skeleton opposite side with it is anti-
Wall with flues metal plate contacts, and is bonded between gum sleeve and plastic skeleton using adhesive.
In order to ensure that adhesive is preferably attached to the surface of plastic skeleton, in the above-mentioned technical solutions, further will
The coated face of plastic skeleton does dermatoglyph processing.
To play optimal seal effect, in the above-mentioned technical solutions, it is further, plastic skeleton contacts one side with metal plate
Curve form and stamping holes match.Moreover, the one side that plastic skeleton is contacted with metal plate is equipped with card-bit part, for pacifying
It fills and fixed.
The invention solves another technical problem be to provide a kind of painting based on above-mentioned vehicle firewall wire harness sheath
Adhesive process using the adhesive of easy attachment and resistance to erosion and optimizes gluing process, prevents sheath from generating sticking to mould when vulcanizing injecting glue
Phenomena such as polluting mold.
The technical solution adopted by the present invention to solve the technical problems is a kind of gluing work of vehicle firewall wire harness sheath
Skill comprises the following steps:
(1) skeleton pre-processes:
A. check whether be infected with dust or spot on skeleton, need to be cleaned up skeleton with alcohol if having;
B. skeleton is dried, drying temperature is 100 ± 5 DEG C, and drying time is 30 ± 5min;
(2) dilute and stir:
A. 1-1.5 times of diluent is slowly added in adhesive;
B. the solid at bucket bottom and bucket wall is swept, dissolved in adhesive;
C. stir evenly;
(3) gluing:
Skeleton is mounted in masking frock, the adhesive diluted is equably sprayed on bone with the cup type sprayer of siphon
On the coated face of frame;
(4) dry:
A. the skeleton sprayed is sent into drying tunnel drying together with masking frock, drying tunnel temperature is 125+5 DEG C, during drying
Between be 50+10min;
B. the skeleton dried from masking frock is removed and is packaged with Dust-proof bag, wait vulcanization injecting glue.
Further, in the above-mentioned technical solutions, diluent is dimethylbenzene, for reducing adhesive viscosity, in order to grasp
Make, improve the wettability and mobility of adhesive.
Further, in the above-mentioned technical solutions, viscosity of the flow cup to adhesive may be employed in dilution and stirring
It is controlled.
Further, in the above-mentioned technical solutions, covering frock includes tablet, and tablet is equipped with to place the peace of skeleton
Fill hole, shape and skeleton masking the face cooperation of mounting hole.
Present invention has the advantages that the present invention adds gluing during the manufacturing of vehicle firewall wire harness sheath
Technique makes the shrink-fit structure between gum sleeve and plastic skeleton become being bonded using adhesive, gum sleeve and plastic skeleton
Between connection it is more secured, sealing performance and persistence are more preferable.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is vehicle firewall wire harness sheath sectional view in the present invention.
Fig. 2 is plastic skeleton glue sites schematic diagram in the present invention.
Fig. 3 is plastic skeleton coated face schematic diagram in the present invention.
Fig. 4 is vehicle firewall wire harness sheath schematic diagram figure in the present invention.
Fig. 5 is fire wall stamping holes schematic diagram in the present invention.
Fig. 6 is coating technique flow chart in the present invention.
Fig. 7 is that gluing covers frock schematic diagram in the present invention.
In attached drawing
1st, rubber parts 11, main casing 12, auxiliary set pipe
13rd, groove
2nd, plastic skeleton 21, card-bit part 22, coated face
23rd, face is covered
3rd, metal plate 31, stamping holes
4th, frock 41, mounting hole are covered
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
As shown in Figure 1, present embodiment discloses a kind of vehicle firewall wire harness sheath, including rubber parts 1 and plastic skeleton
2, rubber parts 1 includes the auxiliary set pipe 12 of funnel shaped main casing 11 and funnel type, and main casing 11 is slightly larger than auxiliary set pipe 12, therefore rubber
The top view of part 1 is rendered as an one small big pear shape.The edge of rubber parts 1 is equipped with groove 13, and groove 13 entangles modeling
Expect the edge of skeleton 2.Plastic skeleton 2 is compound rubber part, and shape is also for pyriform, by one side that rubber parts 1 entangles to extension
It stretches, such a structure increases the contacts area of plastic skeleton 2 and rubber parts 1.
As shown in Figure 1, 2, in the present embodiment, 2 outside of plastic skeleton is additionally provided with card-bit part 21, and card-bit part 21 1 is shared
3, one is arranged on larger that of plastic skeleton 2, other two is arranged on the position of 2 concentric reducer transition of plastic skeleton
It puts.Plastic skeleton 2 can be fixed on by card-bit part 21 on vehicle firewall.
In the present embodiment, the material of plastic skeleton 2 use polyhexamethylene adipamide (PA66), the mechanical strength and
Hardness is very high, and rigidity is very big, ensure that the intensity of this wire harness sheath itself.In addition, the material of rubber parts 1 uses ethylene-propylene-diene monomer
Glue (EPDM), the ageing-resistant performances such as resistance to ozone, heat-resisting, weather-proof are excellent, are widely used in automobile component.
In the present embodiment, it is bonded between rubber parts 1 and plastic skeleton 2 using adhesive.Here preferably by easily attached
It and the adhesive of resistance to erosion, the Chemosil 411 of such as German brand vulcanizes adhesive, gluing can be prevented when vulcanizing injecting glue
Agent is washed on mold by EPDM and causes sticking to mould, and common EPDM adhesive trade mark Chemlok 205 easily glues EPDM products
It is connected on mold.
As shown in Fig. 2, in the present embodiment, plastic skeleton 2 can be divided for coated face 22 and masking face 23, coated face 22
The one side that coated with adhesive is bonded with rubber parts 1 is sought to, masking face 23 is exactly to need to cover to prevent from being coated with the one of adhesive
Face.
As shown in figure 3, in the present embodiment, the coated face 22 of plastic skeleton 2 does dermatoglyph processing, ensure that adhesive is more preferable
Ground is attached to the surface of plastic skeleton 2.
As shown in Figure 4,5, in the present embodiment, to play optimal seal effect, plastic skeleton 2 contacts one side with metal plate 3
Curve form match with stamping holes 31, be similarly pear shape.
In the present embodiment, will harness first be passed through into main casing 11, then the screens by 2 stub end of plastic skeleton when mounted
Part 21 is stuck in stamping holes, and then squeezing the position of 2 concentric reducer transition of plastic skeleton makes it completely by stamping holes 31, three cards
Position part 21 clasps metal plate 3 and wire harness sheath is fixed on metal plate 3.It is noted that auxiliary set pipe 12 increases harness for follow-up,
Its sleeve opening is in sealing state when not in use, such as to subsequently increase harness, need to only cut off its sleeve opening, guiding is increased
Harness passes through auxiliary set pipe 12.
As shown in fig. 6, the present embodiment also discloses a kind of coating technique of vehicle firewall wire harness sheath, including following step
Suddenly:
(1) skeleton pre-processes:
A. check whether be infected with dust or spot on skeleton, need to be cleaned up skeleton with alcohol if having;
B. skeleton is dried, drying temperature is 100 DEG C, drying time 30min;
(2) dilute and stir:
A. 1 times of diluent is slowly added in adhesive;
B. the solid at bucket bottom and bucket wall is swept, dissolved in adhesive;
C. stir evenly;
(3) gluing:
Skeleton is mounted in masking frock, the adhesive diluted is equably sprayed on bone with the cup type sprayer of siphon
On the coated face of frame;
(4) dry:
A. the skeleton sprayed is sent into drying tunnel drying together with masking frock, drying tunnel temperature is 125 DEG C, drying time
For 50min;
B. the skeleton dried from masking frock is removed and is packaged with Dust-proof bag, wait vulcanization injecting glue.
In the present embodiment, for Chemosil 411, the diluent used is used for the adhesive trade mark used for dimethylbenzene
Adhesive viscosity is reduced, in order to operate, improve the wettability of adhesive and mobility.
In the present embodiment, flow cup may be employed in dilution and stirring to control the viscosity of adhesive, viscosity
The application method of cup is the common knowledge of this field, does not add to repeat herein.
As described in Figure 7, in the present embodiment, it is one flat plate to cover frock 4, and multiple be used for fitly is placed on tablet
The mounting hole 41 of plastic skeleton 2 is placed, the shape of mounting hole 41 and the masking face 23 of plastic skeleton 2 coordinate, and are pear shape.
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art
Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the scope of specific embodiment, to the common skill of the art
For art personnel, as long as long as various change appended claim limit and definite spirit and scope of the invention in, one
The innovation and creation using present inventive concept are cut in the row of protection.