CN104708765A - Die for automobile small lamp shade - Google Patents

Abstract

The invention relates to a die for an automobile small lamp shade. The die comprises die molding sliding blocks, a small core, a fixed die plate, a movable die plate, a movable die seat plate, and a fixed die seat plate. The molding sliding blocks (13) are installed in a sliding guide groove of the movable die plate (15), the molding parts of the molding sliding blocks (13) are in convex-concave cooperation, and a fixed die core (9) and a movable die core (20) form the shape of the product. The molding sliding blocks (13) is used for cylinder hollow molding of the product, the fixed die core (9) is compressed by two pressing plates (12) and is then fastened by screws (4), and a molding sliding block rack (16) is in clearance fit with the molding sliding blocks (13). The die provided by the invention has the characteristics of firm and reliable motion and good pressure transfer, and solves the problem of poor fluidity of thermosetting plastics during molding in an injection molding die.

Description

The mould of the little lampshade of automobile

Technical field

The present invention relates to mould, is the mould of the little lampshade of automobile.

Background technology

At mould circle, the plastics mainly thermosetting plastic of the little lampshade of formed automobile, and thermosetting plastics can only adopt following several mould next shaping at mould circle at present: (1) compression mold, when it is compression forming, it is indoor powdery, granular, clastic or fibrous thermosetting plastics raw material directly to be added unlimited mold addition; Then matched moulds heating, make plastic molting, under the effect of clamping pressure, molten plastic is full of die cavity everywhere; At this moment, the plastics in die cavity produce chemical crosslink reaction, and the sclerosis shaping plastic product that molten plastic progressively cannot not changed into molten, finally by manually being taken out from mould by plastic.(2) injection-compression molding mould, it is loaded in the feed compartment of close die by thermosetting plastics raw material, makes it in feed compartment by ardent hopeization.Under the effect of forcing press, melt, by the running gate system bottom feed compartment, enters closed die cavity.Plastics continue to be heated in die cavity, pressurized and curing molding, then open mould and take out plastic.(3) extrusion molding, it first adds in material bin by thermoplastic that is granular or powdery, and under the extrusion screw rod effect rotated, the plastics of heating are forwards carried along the helicla flute of screw rod, thus obtain the certain plastic of shape.(4) extrusion-blown modling hollow molding, it is that extruder first extrudes pipe, and is put in the mould of opposite opened by pipe while hot, clamps the upper and lower two ends of parison while close die, then in blowpipe, pass into compressed air, make preform blowup and to be affixed on die cavity table wall shaping; Finally by pressurize and cooling and shaping, just compressed air can be discharged, and blow moulded part is taken out in die sinking.(5) vacuum forming, it is fixed by thermoplastic sheet and is sealed in the top of die cavity, heater is moved on to above sheet material, sheet material is heated to softening, then heater is removed, vacuumize in die cavity, sheet material is just attached on concave die cavity, passes into compressed air blown out by the plastic of forming after cooling by aspirating hole.(6) compressed air extension method vacuum forming, it is first fastened on die by plastic plate, and with heater, it is heated, heater is removed after plastic plate thermoplastic, compressed air by punch be blown into plastic plate blow drum after again by punch jack-up, then stop blowing, punch vacuumizes that plastic plate is close on punch is shaping, in punch, finally passes into compressed air make the plastic demoulding.Several mould structure is simple above, and consumption of raw materials is little, and equipment is simple, but the production cycle is long, and production efficiency is low, and to complex-shaped, that wall thickness is larger plastic, the dimensional accuracy of short transverse is low, can not the meticulous plastic of press belt.Because the little lampshade of automobile adopts thermosetting plastics shaping, adopt above-mentioned mould to produce, goods are with significant drawback.If it is shaping to adopt existing injecting molding die technology, due to thermosetting plastics poor fluidity, be difficult to be filled with mold cavity, cause the scarce material of goods and product size not to reach requirement.In order to overcome above-mentioned defect, I in conjunction with a line for many years manufacture and design experience, special provide the mould of following a kind of injection moulding method to solve the problems referred to above to mould colleague.

Summary of the invention

The present invention is the mould of the little lampshade of automobile, adopt shaping this feature of thermosetting plastics to overcome the little lampshade of automobile, due to thermosetting plastics poor fluidity, as shaping in adopted conventional injection mould structure, just cause the scarce material of goods or product size not to reach requirement.In order to overcome this problem, the therefore off the beaten track design of this mould, but adopt following several scheme to solve problem: 1, thin for the contracting of the solid plate of mould, the flow process of plastic melt can be reduced like this, to enter mold cavity fast.(2) mold cavity number reduces, and this mould, in order to fill fast, only devises two die cavities.(3) mold cavity is as far as possible to the middle ranking of mould.(4) in order to plastics enter mold cavity fast when filling mold cavity, when increasing injector pressure when injecting, in order to the moulding section preventing plastic melt punch die power from rushing inclined mould molding slide block, and there is position skew, therefore the moulding section of this mould two forming slides (13) adopts male-female engagement, shown in (19).(5) in order to deviate from goods fast, this mould does not arrange ejecting mechanism, and the demoulding of goods drops out outside mould by deadweight after two forming slides are opened.(6) in order to compact mould, the aperture (9) of this mould to goods side does not adopt slipper block loose core, but adopts spring to force small-sized core (10) to have upspring loosing core of aperture (9).(7) because this mould is to mold center's ranking, cooling is without position, and therefore cooling water channel channels designs is on two forming slides (13).This cooling is comprehensive cools the main forming part of mould, works very well, and goods thermal deformation can not occur.(8) in order to the quick matched moulds of mould enters next cycle moulding by casting, this mould adopts slide block, Angle Pin to loosing core of the large stomidium of goods, baroclinic block triple combination has come, and is conducive to again the locking of mould simultaneously.This mould, by optimal design, is of value to heat cured plastics rapid shaping, is of value to presentation quality and the production efficiency of goods.The mould of the little lampshade of automobile, solve and adopt the vacuum forming of compressed air extension method, compression forming, injection-compression molding, extrusion molding, extrusion-blown modling hollow molding, when vacuumizing shaping, article manufacturing cycle is long, and production efficiency is low, can not suppress the problem of meticulous plastic.Solve the conventional plastics injection mould problem that poor fluidity, filling die cavity are slow when injecting thermosetting plastics.The mould of the little lampshade of automobile, it is characterized in that: Angle Pin (7) and forming slide (13) are slidably matched, after forming slide (13) and baroclinic block (4) inclined-plane matched in clearance, Angle Pin (7), forming slide (13), briquetting (4) coordinates the large end core-pulling mechanism of rear mold, the forming part of forming slide (13) is divided into male-female engagement, small-sized core (10) is arranged on solid plate (6), fixed mold core (9) uses screw (4) fastening after compressing with pressing plate (12) again, cooling water pipe (3) and forming slide (13) shape of threads immovable fitting, baffle plate (1) and cooling water pipe matched in clearance, forming slide frame (16) and forming slide (13) matched in clearance, screw fastening is used again after moving platen (15) and mavable module core (20) compress with the second briquetting (18).

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention is further described

Shown in figure

Fig. 1 is the mould die sinking sectional side elevation of the little lampshade of automobile

Sectional side elevation when Fig. 2 is the mould matched moulds cast of automobile little lampshade

In figure, numeral number represents respectively:

1---baffle plate 2---inlet opening 3---cooling water pipe

4---baroclinic block 5---first screw 6---solid plates

7---Angle Pin 8---laminates spring 9---fixed mold cores

10---small-sized core 11---spring 12---the first pressing plates

13---forming slide 14---second screw 15---moving platens

16---forming slide frame 17---counter 18---the second pressing plates

19---core male-female engagement place 20---mavable module core

Detailed description of the invention:

The mould of the little lampshade of automobile as shown in the figure, this mould is in conjunction with the feature of thermosetting plastics poor fluidity, again according to the resemblance of goods, the shaping prerequisite of goods is met through optimal design, this mould due to the main body of goods are drums, there are four boss at its lateral surface, wherein have on two boss also with aperture.According to the resemblance of goods, this mould die joint is selected within the barrel on axis, its moulded products profile has been come by fixed mold core (9) and mavable module core (20), aperture on shaping cylinder lateral surface boss has been come by the upper small-sized core (10) installed of fixed mold core (9), and the macropore of moulded products cylinder has been come by forming slide (13).Consider the problem of the poor fluidity of thermosetting plastics simultaneously, this mould takes the version in mould two chamber in ranking, in order to shorten the flow process of plastic melt, this model cavity draws close ranking to mold center as far as possible, adopt drop gate to fill simultaneously, in order to prevent when filling because drop gate is too large to the punch die power of workpiece, therefore the moulding section of forming slide (13) is designed to male-female engagement, with the position of the inclined workpiece of erosion control.This mould is considered to shorten thermosetting plastics melt flow process in a mold as far as possible, ranking is drawn close to mold center as far as possible, Gu cooling water is installed without position, therefore cooling water channel is arranged on forming slide (13), this design cools the main forming part of mould better, urethane cure is faster, serves better effect to the demoulding.This mould does not establish ejecting device, and it is after mould active and inactive mold is opened, and after forming slide (13) extracts moulding section out, drops out outside mould by goods deadweight.The operating principle of this mould is: when mould installation and debugging in injector are good, after cast, pressurize, cooling, the pressure of injector opens mould, move after the dynamic model part of at this moment injector driven mold, the outer lug boss be now molded on fixed mold core is drawn out, the aperture of small-sized core (10) under the effect of spring (11) in extraction boss simultaneously on shaping boss, completes loosing core of goods outer lug boss aperture.Mould dynamic model part continues to retreat, at this moment, the Angle Pin (7) being arranged on cover half one side forces forming slide (13) to the translation of mould lateral direction, until the moulding section of forming slide (13) extract out completely from goods and the stripping room ensuring 5-6mm apart from after, forming slide (13) just stops action under the effect of baffle plate (1).During matched moulds, first action contrary when die sinking done by mould is that Angle Pin (7) forces forming slide (13) to the action of die inside direction, completes forming slide (13) and resets.When mould is opened after part resets completely, mould active and inactive mold is just locked and is carried out next cycle moulding by casting.

Claims (1)

1. the mould of the little lampshade of automobile, it is characterized in that: Angle Pin (7) and forming slide (13) are slidably matched, forming slide (13) and baroclinic block (4) inclined-plane matched in clearance, Angle Pin (7), forming slide (13), the large end core-pulling mechanism of mould is just formed after briquetting (4) coordinates, the forming part of forming slide (13) is divided into male-female engagement, small-sized core (10) is arranged on solid plate (6), fixed mold core (9) uses screw (4) fastening after compressing with pressing plate (12) again, cooling water pipe (3) and forming slide (13) shape of threads immovable fitting, baffle plate (1) and cooling water pipe matched in clearance, forming slide frame (16) and forming slide (13) matched in clearance, screw fastening is used again after moving platen (15) and mavable module core (20) compress with the second briquetting (18).