The arrestment mechanism of rotary drawing and blowing machine
Technical field
The present invention relates to the plastic hollow vessel drawing-blowing forming machine, particularly relate to the arrestment mechanism of rotary drawing and blowing machine, belong to plastics machinery and make the field.
Background technology
Adopt to annotate hollow plastic containers such as stretch blow processing mineral water bottle, oil bottle, at first plastic raw materials (as PET etc.) is annotated and made the bottle pipe, by heater the bottle pipe is heated again, then manage the stretch blow moulding by the bottle of stretch blow machine after heating by injection machine.Because the operating efficiency of reciprocating type stretch blow machine is lower; so someone has invented rotary drawing and blowing machine; rotary drawing and blowing machine has a rotary main shaft; a plurality of Stretch and Blow Mechanisms of being made up of drawing mechanism, inflatable body and clasp mould mechanism etc. are upwards evenly installed in the footpath of rotary main shaft, thereby realize multistation (as three stations, four stations, five stations or the like) production.Its rotary main shaft is generally by driven by motor; but when motor is shut down; because inertia force is arranged; make the rotary main shaft can't be reliable; stably stop; so generally all be provided with arrestment mechanism; existing arrestment mechanism is an affixed brake disc on rotary main shaft; adopt two relative cylinders again; the piston rod of two cylinders is affixed brake(-holder) block respectively, when need brake, the piston rod of two cylinders is stretched out; drive corresponding brake(-holder) block respectively and embrace brake disc; utilize the friction between brake(-holder) block and the brake disc that rotary main shaft is stopped operating, but because inertia force is bigger, cylinder; rotary main shaft all damages easily; and a plurality of Stretch and Blow Mechanisms are housed on the rotary main shaft; make main shaft change trouble, the brake(-holder) block on the cylinder piston rod easily lost efficacy, and braking effect is poor.
Summary of the invention
The objective of the invention is provides a kind of rotary main shaft of avoiding damaging, good braking effect, the arrestment mechanism of the rotary drawing and blowing machine of long service life in order to overcome the shortcoming that prior art exists.
The technical scheme of the arrestment mechanism of rotary drawing and blowing machine of the present invention is: rotary drawing and blowing machine comprises feed mechanism; heater; Stretch and Blow Mechanism and bottle-fetching mechanism; Stretch and Blow Mechanism comprises drawing mechanism; inflatable body and clasp mould mechanism; Stretch and Blow Mechanism drives the motion that rotates in a circumferential direction by rotary main shaft; rotary main shaft is by driven by motor; driven gear is installed in the bottom that it is characterized in that described rotary main shaft; described motor is with through synchronously and is connected power transmission shaft with synchronous pulley; the outer affixed driving gear of power transmission shaft; driving gear is meshed with driven gear; affixed brake disc under the driving gear, the end face of brake disc and bottom surface respectively with brake on last brake(-holder) block and following brake(-holder) block contact.
Compared with the prior art the arrestment mechanism of rotary drawing and blowing machine of the present invention, has following advantage: first, brake disc is installed on the additional power transmission shaft, and power transmission shaft arrives rotary main shaft through gear with transmission of power, thereby avoids damaging rotary main shaft, maintenance rate is low, thereby reduces cost; The second, adopt special-purpose brake to brake, long service life, braking effect is good.Its concrete course of work is as follows: motor is by the synchronous pulley of band drive synchronously, synchronous pulley drives the driving gear rotation through power transmission shaft, driving gear is meshed with driven gear, thereby with transmission of power to rotary main shaft (rotation is supported in the revolution that promptly drives entire machine), to reach the purpose of whole rotary drawing and blowing machine rotation; When machine quits work, make motor outage earlier, the brake magnetic valve action on the motor forces brake work, and the upper and lower brake(-holder) block of brake rubs with the brake disc on the power transmission shaft, forces entire machine to stop the rotation to reach the purpose of brake.
The arrestment mechanism of rotary drawing and blowing machine of the present invention, its described brake is 1 or 2 or 3, the Stretch and Blow Mechanism of installing when rotary main shaft is many more, be that the station number is many more, as 10,14,16,20 etc., then rotary main shaft is big more, and inertia force is also big more, needs a plurality of brakes that rotary main shaft is stablized usually and stops.
Description of drawings
Fig. 1 is the structural representation of the arrestment mechanism of rotary drawing and blowing machine of the present invention.
The specific embodiment
The invention discloses a kind of arrestment mechanism of rotary drawing and blowing machine; rotary drawing and blowing machine comprises feed mechanism; heater; Stretch and Blow Mechanism and bottle-fetching mechanism; Stretch and Blow Mechanism comprises drawing mechanism; inflatable body and clasp mould mechanism; Stretch and Blow Mechanism drives the motion that rotates in a circumferential direction by rotary main shaft; rotary main shaft is by driven by motor; as shown in Figure 1; driven gear 8 is installed in the bottom that it is characterized in that described rotary main shaft 1; described motor 9 is through being with 2 to be connected power transmission shaft 4 with synchronous pulley 3 synchronously; power transmission shaft 4 outer affixed driving gears 5; driving gear 5 is meshed with driven gear 8; 5 times affixed brake discs 6 of driving gear, the end face of brake disc 6 and bottom surface contact with last brake(-holder) block 71 and following brake(-holder) block 72 on the brake 7 respectively.Compared with the prior art, have following advantage: the first, brake disc 6 is installed on the additional power transmission shaft 4, power transmission shaft 4 arrives rotary main shaft 1 through gear with transmission of power, thereby avoids damaging rotary main shaft, and maintenance rate is low, thereby reduces cost; The second, adopt special-purpose brake to brake, long service life, braking effect is good.The kind of brake is a lot, as the electromagnetic type brake, disc brake, comparatively commonly used is disc brake, disc brake has multiple again, as the pneumatics disc brake, the oil pressure disc brake, air pressure disc brake etc., with the pneumatics disc brake is example, as shown in Figure 1, the pneumatics disc brake comprises shifting block 73 and following shifting block 74, last shifting block 73 drives goes up brake(-holder) block 71, following shifting block 74 drives brake(-holder) block 72 down, the concrete course of work of whole arrestment mechanism is as follows: motor 9 is by being with 2 to drive synchronous pulley 3 synchronously, and synchronous pulley 3 drives driving gear 5 rotations through power transmission shaft 4, and driving gear 5 is meshed with driven gear 8, thereby to rotary main shaft 1, rotation is supported in the revolution that promptly drives complete machine with transmission of power; When machine quits work, make motor 9 outage earlier, the brake magnetic valve action on the motor 9 forces brake 7 work, and the upper and lower brake(-holder) block 71,72 of brake 7 rubs with the brake disc on the power transmission shaft 46, forces entire machine to stop the rotation to reach the purpose of brake.Its described brake 7 is 1 or 2 or 3, the Stretch and Blow Mechanism of directly upwards installing when rotary main shaft is many more, be that the station number is many more, as 10,14,16,20 etc., then rotary main shaft is big more, inertia force is also big more, needs a plurality of brakes that rotary main shaft is stablized usually and stops.