CN201317082Y

CN201317082Y - Mold replacing trolley positioning mechanism

Info

Publication number: CN201317082Y
Application number: CNU2008201700877U
Authority: CN
Inventors: 叶群方
Original assignee: NINGBO HAITIAN HEAVY INDUSTRY MACHINERY Co Ltd
Current assignee: Haitian Plastics Machinery Group
Priority date: 2008-12-18
Filing date: 2008-12-18
Publication date: 2009-09-30
Anticipated expiration: 2018-12-18

Abstract

Disclosed is a mold replacing trolley positioning mechanism which comprises a positioning cylinder, a positioning seat and relevant travel switches; wherein the positioning cylinder comprises a cylinder, a cylinder block and a positioning pin; the positioning pin is arranged on a piston rod of the cylinder; the cylinder and the positioning pin are installed on the trolley; the positioning seat comprises a bearing block and two pin rollers which are respectively fixed on the bearing block; a positioning hole is formed between the two pin rollers; and during the positioning process, the positioning pin is inserted in the positioning hole between the two pin rollers. The mold replacing trolley positioning mechanism has the advantages of (1) good positioning reliability: the two old plane contact pairs are replaced by two rolling pairs, thus totally eliminating the phenomenon of deadlock; the arrangement is more reasonable; and the mechanical position limiting can ensure that the trolley can be precisely positioned when being fully loaded; (2), high positioning precision: the positioning repeatability precision can reach 0.2mm or even higher; (3) lower requirement to the rigidity of the trolley: since the positioning device is installed at the middle of the two tracks of the trolley, so the trolley can not run off the tracks in the positioning process; and (4)low cost.

Description

Die change chassis detent mechanism

Technical field

The utility model relates to the quick mold change systems that is applicable in the injection molding production process, the detent mechanism of die change chassis in particularly a kind of injection machine quick mold change systems.

Background technology

Maturation gradually along with the quick die change technology, increasing large-scale injection molding apparatus has disposed the frequent replacing that quick mold change systems is dealt with mould, quick mold change systems mainly comprises die change chassis and detent mechanism, the major function of die change chassis detent mechanism is that die change chassis (transporting mould) is accurately located reliably at direction along ng a path, with correctly carrying out that the shifting formwork that guarantees next step moves.

Show as Fig. 1, existing chassis detent mechanism comprises location cylinder 4, alignment pin 7, alignment pin 8, locating piece 9, the movable motor 1 of die change chassis drives bogie wheels 2 along track 3 operations, when chassis is gone to a certain predefined decelerate position, retarding travel switch triggering, cylinder 4 drive alignment pin 7 descending while movable motors 1 slows down, and positioning stroke switch triggers when alignment pin 7 is soon run into locating piece 9, it is descending that cylinder 5 drives alignment pin 8, and this moment, two alignment pins were clamped a positioning block realization location.

The shortcoming of above-mentioned chassis detent mechanism is that (1) reliability of positioning is poor: alignment pin contacted with locating piece collision property when chassis stopped, and alignment pin closely contacts with a certain plane of locating piece behind the horizontal shifting formwork of chassis, and is stuck easily, and alignment pin usually can't be extracted.(2) positioning accuracy is poor: alignment pin is that face contacts if the gap of improving between two alignment pins of positioning accuracy and the locating piece will reduce with locating piece, will cause alignment pin easier to be stuck.(3) positioning and rigid is poor: because this detent mechanism of structural relation generally is installed on a certain rail side of chassis, and this chassis sideslip will cause locating the time, the rigidity of whole chassis structure is required also to improve.(4) detent mechanism cost height: detent mechanism uses two location cylinders (two air valves) and two alignment pins, cost height.

The utility model content

The die change chassis detent mechanism of a kind of compact conformation that technical problem to be solved in the utility model provides, good rigidly, precision height, good reliability, it can overcome the defectives such as low precision, poor reliability, cost height of existing detent mechanism effectively.

The utility model solves the problems of the technologies described above the technical scheme that is adopted:

Die change chassis detent mechanism, it is characterized in that: comprise location cylinder, positioning seat and relevant travel switch, wherein locate cylinder and comprise cylinder, cylinder seat, alignment pin, alignment pin is put on the piston rod of cylinder, cylinder, alignment pin are installed on the chassis, and positioning seat comprises bearing block, roller, and two rollers are separately fixed on the bearing block, form locating hole between two rollers, alignment pin is inserted in two locating holes between the roller during location.

Detent mechanism is arranged between two guide rails, positioning seat is fixed on the ground, relevant travel switch is arranged on the position that the die change chassis need slow down and locate, chassis is driven by movable motor, movable motor is a variable frequency reducer motor, the automatic band-type brake function is arranged, this motor is directly installed on the bearing cap of wheel, driving chassis travels in orbit, need not other transmission mechanism between motor and the wheel, when chassis triggers the retarding travel switch, slow down earlier, when running into positioning stroke switch again, triggering cylinder, to drive alignment pin descending and insert in the locating hole between roller and stop chassis further to move ahead and locate.

Above-mentioned detent mechanism also is provided with mechanical position limitation, and mechanical position limitation is arranged on the front end of guide rail, thoroughly stops before the chassis and then makes the chassis location.

Compared with prior art, advantage of the present utility model is:

(1) reliability of positioning is good: two traditional Plane Contact Pair are replaced, are not had stuck phenomenon fully by two rolling pairs, and layout is more reasonable.Mechanical position limitation can guarantee that chassis full load (inertia is big) still can accurately locate.

(2) positioning accuracy height: the location repeatable accuracy can reach 0.2mm even higher.

(3) rigidity to chassis requires low relatively: because this positioner is easily installed in the centre of chassis two tracks, chassis can sideslip during the location.

(4) cost is low: existing relatively chassis detent mechanism uses two location cylinder, two air valves and two alignment pins; And the utility model only needs a location cylinder, an air valve.

Description of drawings

Fig. 1 is the overall structure schematic diagram of existing chassis detent mechanism.

Fig. 2 is the overall structure schematic diagram of the utility model embodiment.

Fig. 3 is the detent mechanism structural representation of the utility model embodiment.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 2, die change chassis detent mechanism comprises location cylinder 11, positioning roller 12, mechanical position limitation and relevant travel switch.

Walking variable frequency reducer motor 10 is directly installed on the bearing cap of wheel, and movable motor 10 drives bogie wheels 13 along track 14 operations.

As shown in Figure 3, described location cylinder 11 is fixed in the top of cylinder seat 18, an end of alignment pin 19 is connected with the piston rod of location cylinder 11, alignment pin 19 external diameters cooperate with cylinder seat 18 endoporus, and the bottom of alignment pin 19 is milled flat thickness and is made as H, and cylinder seat 18 is fixed in the middle of chassis end face.

Said cylinder seat side also is provided with guide pad 20, and alignment pin 19 is moving up and down under the effect of cylinder 11 and under the guiding of guide pad 20.

Two identical rollers 12 are installed on the bearing block 21 by end ring, space between two rollers is bigger slightly than the thickness H of alignment pin 19, be generally about H (+0.5 0.20) to guarantee its positioning accuracy, bearing block 21 is fixed in a certain position of ground by fot screw.

Mechanical position limitation bolt 16 can before and after adjust, with bolt head over against chassis on anti-collision block 15 is installed.

Above-mentioned anti-collision block 15 general available nylon blocks, elasticity is better, to reduce impact.

Operation principle of the present utility model is to adopt two rolling pairs to replace two planar friction pairs promptly to adopt an alignment pin to be inserted in to replace locating piece of former two alignment pins folder to realize the location between two rollers.

When the decelerate position of a certain setting is arrived in movable motor 10 driving chassis orbiting, the retarding travel switch triggering, chassis slows down and continues to advance; Positioning stroke switch triggers when chassis runs to the position location of setting, and movable motor 10 brake sticking brakes cylinder 11 simultaneously drive between descending two rollers 12 that are inserted into bearing block 21 fast of alignment pin 19 and realize the location.Advance if chassis is fully loaded, because inertia ratio is bigger, chassis may will stop under the effect of mechanical position limitation bolt 16 at last that (but the impact of 16 pairs of chassis of mechanical position limitation bolt can be very not big, therefore front motor brake sticking brake, chassis slows down) simultaneously alignment pin 19 roll at the driving lower edge of cylinder 11 roller 12 and realize the location between two rollers, that this location structure impacts is little, precision is high, the location is reliable.

Claims

1, die change chassis detent mechanism, it is characterized in that: comprise location cylinder, positioning seat and relevant travel switch, wherein locate cylinder and comprise cylinder, cylinder seat, alignment pin, alignment pin is put on the piston rod of cylinder, cylinder, alignment pin are installed on the chassis, and positioning seat comprises bearing block, roller, and two rollers are separately fixed on the bearing block, form locating hole between two rollers, alignment pin is inserted in two locating holes between the roller during location.

2, die change chassis detent mechanism according to claim 1, it is characterized in that: described cylinder seat is provided with guide pad.

3, die change chassis detent mechanism according to claim 1 and 2 is characterized in that: the mechanical position limitation piece also is set.

4, die change chassis detent mechanism according to claim 3 is characterized in that: the mechanical position limitation piece that described mechanical position limitation piece is an adjustable distance.

5, die change chassis detent mechanism according to claim 3 is characterized in that: before the described mechanical position limitation piece anti-collision block is set.