CN201362990Y

CN201362990Y - Car door inner handle

Info

Publication number: CN201362990Y
Application number: CNU2008202238777U
Authority: CN
Inventors: 蔡淑琼; 张政; 刘军
Original assignee: Chengdu Space Mould and Plastic Co Ltd
Current assignee: Chengdu Space Mould and Plastic Co Ltd
Priority date: 2008-12-30
Filing date: 2008-12-30
Publication date: 2009-12-16
Anticipated expiration: 2018-12-30

Abstract

The utility model discloses a car door inner handle, which comprises a handle, a gate and a first air inlet. A second air inlet is additionally arranged at the rear part of the large end of the handle close to the large surface. When in manufacturing, the first air inlet is opened to inlet air after the second air inlet is opened to inlet air first, the air charging and the pressure maintaining are ensured on the thicker wall of the large surface, and the plastics are compacted so as to ensure no shrinkage deformation and no buckling deformation (deformation equal to or less than 1mm) on the large surface. The utility model has the advantages that the overall structure of the traditional handle is not changed, and the problems that the large surface is apt to encounter buckling deformation and the requirement on the appearance and the assembly is not satisfied since only one air inlet is arranged at the large end of the traditional handle are solved. Moreover, compared with the deformation of approximately 2.5mm of the imported handles of the same kind, the deformation of the handle disclosed by the utility model is equal to or less than 1mm.

Description

Handle in a kind of automotive door

Technical field

The utility model relates to the Manufacturing Technology for Automotive Parts field, relates in particular to handle in a kind of automotive door.

Background technology

The utility model handle is mounted in the automotive door inboard, as the handle of closing the door with close behind the door that the handrail of car seat uses.At present, the interior handle of traditional this kind automotive door that is installed in the arrangements for automotive doors inboard adopts the gas auxiliary injection molding process manufacturing.That is: a certain amount of molten plastic injects in elder generation in mould, inject high pressure nitrogen in molten plastic central authorities then, high pressure nitrogen (0-350bar) forms air flue along predefined path, promote the melting plastic cement and continue to be filled with die cavity, after this enter packing stage, cooling replaces the plastic cement pressure maintaining period with the gas pressurize simultaneously, the last exhaust demoulding.High pressure nitrogen enters that nature can pass through the position of viscosity low (temperature height) and low pressure behind the plastics, and can in cooling procedure, utilize the gas high pressure come pressurize make plastics be close to mold wall on.

Because this kind handle has the very about 10mm of thickness (conventional thickness is below 4mm) of a big face, and there is the rib of a projection at this place, thereby when filling, causes gas bigger resistance, because gas always flows along the direction that barometric gradient changes greatly, therefore gas does not enter the wall thickness thicker part of big face at all, causes this place to cause serious buckling deformation owing to the too thick contraction of wall thickness is serious inhomogeneous.

The big face inner surface of the handle of the same race of import has the vestige of similar heating tube, according to introducing on the data, we judge on state's outer mold may be provided with strong cold formed device specially at this place, promptly in the gas pressurize, open strong device for cooling, the surfaces externally and internally that makes big face is cooling and shaping rapidly, so its deflection very little (about 2.5mm).Because temperature control is carried out to mould design and very high to the required precision of injection machine in the mould part, domestic level does not reach predetermined requirement at all, so the idea of our foreign imitation structure is difficult to realize.

And must overcome (the distortion≤2.0mm) of this defective after this kind handle production domesticization.But the tradition handle only has an air inlet port in the big face inboard at handle middle part, thereby when filling, causes gas bigger resistance, because gas always flows along the direction that barometric gradient changes greatly, therefore gas does not enter the wall thickness thicker part of big face at all, thereby this place causes serious buckling deformation owing to the too thick contraction of wall thickness is serious inhomogeneous.

So, in traditional this kind of automotive door the deflection of the big face of handle can not≤2mm, can not satisfy outward appearance and matching requirements.

The utility model content

The utility model is intended to solve the big face of the interior handle of existing traditional this kind automotive door and causes serious buckling deformation owing to the too thick contraction of wall thickness is serious inhomogeneous, can not satisfy the problem of outward appearance and matching requirements, a kind of interior handle of automotive door of difficult generation buckling deformation is provided.

For reaching above-mentioned purpose, the utility model is taked following scheme: handle in a kind of automotive door, comprise: handle, cast gate and at first air inlet port of big face inboard, handle middle part, described cast gate is arranged on the small end head of handle, does not change under the integrally-built situation of handle to have additional second air inlet port at the close big face place of the afterbody of the big end of handle.After finishing injection moulding, the first air inlet port air inlet is restarted in the air inlet of second air inlet port elder generation, guarantees big face energy air inlet pressurize, with the plastics compacting.Thereby plastics can't produce shrinkage strain, and the big face that guarantees the utility model handle does not produce buckling deformation (deflection≤1mm).

The beneficial effects of the utility model are: adopt the utility model scheme need not change the handle overall structure, and the big facial disfigurement≤2.0mm that shakes hands, reach≤1mm, satisfy outward appearance and matching requirements fully.Simultaneously, shake hands big facial disfigurement amount less than the distortion of import exemplar (the about 2.5mm of import exemplar distortion).

Description of drawings:

Fig. 1 is the structural representation of the utility model handle,

Fig. 2 is the schematic perspective view of Fig. 1,

Fig. 3 is an A part partial enlarged drawing among Fig. 1,

Among the figure: 1, handle, 2, cast gate, 3, first air inlet port, 4, second air inlet port, 5, big face.

The specific embodiment:

As Fig. 1, Fig. 2, Fig. 3, handle in a kind of automotive door, the 1 small end head of shaking hands has cast gate 2, and there is first air inlet port 3 big face inboard in the middle part of handle, and close big face place has additional second air inlet port 4 at the afterbody of the big end of handle.During manufacturing, after injecting an amount of molten plastic, earlier by restarting the first air inlet port air inlet after the second air inlet port air inlet by cast gate 2.Guarantee the wall thickness thicker part energy air inlet pressurize of big face 5, with the plastics compacting.Thereby can't produce shrinkage strain, guarantee that big face does not produce buckling deformation (deflection≤1mm).

Claims

1, handle in a kind of automotive door, comprise: handle (1), cast gate (2) and first air inlet port (3), described cast gate (2) is arranged on the small end head of handle (1), described first air inlet port (3) is arranged on big face inboard, handle (1) middle part, it is characterized in that: the afterbody at the big end of handle has additional second air inlet port (4) near big face place.