CN1084450A

CN1084450A - Notes, blow once-through moulding die

Info

Publication number: CN1084450A
Application number: CN 92109788
Authority: CN
Inventors: 简国洪; 简显新
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-21
Filing date: 1992-09-21
Publication date: 1994-03-30

Abstract

Notes, blow once-through moulding die, the cavity plate of its cover half and decide that preceding push pedal is arranged between base plate, dynamic model has the cavity plate of paying, between itself and moving base plate back push pedal is arranged, blowing cavity is arranged on the cavity plate, pay on the cavity plate injection moulding die cavity is arranged, the injection molding core retainer plate that tightens up on injection molding cavity cover that tightens up on the noseplate and the back base plate, insert the blowing cavity from both sides, form the injection moulding die cavity therein, adopt described mould can produce the bottle class plastic products of the big cavity of osculum, can produce this series products than blowing and improve precision, presentation quality and production efficiency with injection machine.

Description

Notes, blow once-through moulding die

The present invention relates to mould of plastics, particularly can in a secondary mould, finish the mould of plastics of injection moulding, blowing.

Injection moulding is two kinds of different plastics forming modes with blowing, and the structure of dual mode mould therefor is also completely different.The precision of injection-molded item is higher relatively, and the low precision of blow-molded article.Usually can only produce the hollow plastic product of wide-mouth with injection moulding process, as the housing of cup and utensil etc.Produce the product of the big cavity of osculum, as medicine bottle etc.Can't extract out because of core, can not adopt injection moulding process, must adopt blowing.Blow molding die is to the both sides folding, and the prominent trace that all leaves parting line of blow-molded article outer surface influences presentation quality.In addition, blow moiding method production plastic products efficient is low, and precision is low, is difficult to satisfy the relevant medicine bottle sealing of medical administrative department formulation and the requirement of presentation quality, causes the product of China extremely most at present Plastic medicinal bottle manufacturer not reach national standard.

The present invention's purpose provides a kind of injection machine that is used for, and the mould of injection moulding, blowing once-forming is with precision, presentation quality and the production efficiency of the big vacuum plastic goods of osculum that improve the bottle class.

Described notes, blowing one-time forming die, the guide pillar that cover half, dynamic model is arranged and guide each template to move.Hot runner system is housed on the cover half.Edge is lined with a piece and fastening between the shape chamber plate of cover half and the noseplate, and preceding push pedal is housed between cavity plate and noseplate.Dynamic model has pays a cavity plate, its with the back base plate between cushion block arranged and tighten up, pay cavity plate with after be equipped with between the base plate after push pedal.The preceding push pedal travel mechanism and the back push pedal travel mechanism that can make forward and backward push pedal move and reset respectively are housed, the lock that can tighten automatically when having it to reset in the preceding push pedal in the mould.The die cavity of cavity plate aligns mutually when matched moulds with the shape chamber of paying cavity plate and is close to.Injection moulding die cavity before being fixed tightly in the push pedal overlaps in the blowing cavity that inserts cavity plate and can move along its axis direction, being fixed tightly in the injection core of back in the push pedal covers the cavity plate of paying through an intermediary in a business deal and inserts in the injection moulding die cavity cover in the blowing cavity of cavity plate, also can move along its axis direction, promptly in blowing cavity, form the injection moulding die cavity, insert the blow air pipe in the injection molding core retainer plate, this pipe front end sealing, its air flue passes to the pipe side in this pipe front portion, moving of preceding push pedal can be extracted injection moulding die cavity cover out, moving of back push pedal can be taken out out the gas port that the injection molding core retainer plate exposes the blow air pipe, forms the blowing chamber.

The push pedal clamping lock that resets is that a spring in the push pedal promotes the dead bolt that can move along the parallel direction of plate before being contained in before aforesaid, it can block a lock hook, dead bolt by center push rod one side be the inclined-plane, the front portion of center push rod is a cone, and step is arranged after the cone.The center push rod moves forward and backs down dead bolt earlier, and push pedal is moved before promoting again.The reset lever of push pedal before be equipped with in the mould outside.

Push pedal travel mechanism is after aforesaid, there is spring to be pressed in and pays between cavity plate and the back push pedal, it can push away the back push pedal and pay cavity plate, bar runs through the back push pedal, pays cavity plate once in addition, cavity plate is fastened in the preceding push pedal, return bar one end in contact and be contained in an end of the lever block on the base plate, lever block other end contact back push pedal.Returning bar during matched moulds presses the back push pedal to be close to a pair cavity plate by lever block.

The present invention inserts injection moulding die cavity cover and injection molding core retainer plate in blowing cavity, promptly formed the injection moulding die cavity in blowing cavity.Work as injected plastic, extract injection moulding die cavity cover when uncolled out, and slightly return the injection molding core retainer plate, expose the gas port of blowing, can carry out blowing.Adopt described mould, can use injection machine to produce the bottle based article of the big cavity of osculum, expanded the application of injection machine.The bottleneck position of its product is injection molded fully, can guarantee to satisfy with the quality of fit of bottle cap the bottleneck sealing requirements of medicine bottle series products.Be to release the demoulding along axis direction after the formed product, body does not have the somatotype stria of the product that side direction folding mould mode makes, and highly polished, presentation quality is good.Owing to adopt injection machine production, than adopting blow moulding machine production obviously to enhance productivity.

Fig. 1, the vertical view of described mould is promptly analysed and observe directional diagram;

Fig. 2 is the A-A view of Fig. 1;

Fig. 3 is the K partial enlarged drawing of Fig. 2.

Noseplate 1 is by fixed clamping plate, and electric hot plate, hot runner manifold, electric heating mouth 23 are formed, and it is a prior art.3 of noseplate 1 and cavity plate are lined with a piece 15 and fastening, and preceding push pedal 2 is contained in can be along guide pillar 22 translations between noseplate 1 and the cavity plate 3.Preceding push pedal 2 is made up of plate 26,27.Have eight blowing cavities 32 on the cavity plate 3, the cast gate that is fixed on the electric heating mouth 23 on the noseplate 1 passes to blowing cavity 32, and an end of injection moulding die cavity cover 33 has step to be clamped in the

plate

26,27, and its other end inserts blowing cavity 32.26,27 dress locks 19 of plate, it is that a spring 20 heads on the dead bolt 21 that can move along the parallel direction of plate, and the vertical direction of plate is fixed a lock hook, and dead bolt 21 is inclined-planes by center push rod 12 1 sides, and the cone 25 of colluding is taken off for promoting dead bolt 21 in push rod 12 front portions in center.There is the step 24 that promotes preceding push pedal 2 at the cone rear portion of center push rod 12.Pay cavity plate 4 and be made up of plate 16,17, angle is opened in the position of the corresponding blowing cavity 32 of plate 17, and awl piece 31, the two awl pieces 31 that have dovetail groove to connect two hollows in the angle close up injection molding cavity and the part blowing chamber that its hollow part, back forms

bottleneck.Awl piece

31 and 5 shock mounts 30 of back push pedal.(if the bottle of producing, its bottleneck do not have screw thread or step can be along the axis demoulding, then on the plate 17 directly the open form chamber and needn't adopt the structure of boring piece).Back push pedal 5 is made up of plate 13,14, and it can pay cavity plate 4 and 6 translations of back base plate along guide pillar 11.Injection molding core retainer plate 28 1 ends have step to be clamped in the push pedal 5 of back, and the other end passes to be paid cavity plate 4 and extend in the injection moulding die cavity cover 33 in the blowing cavity 32, has formed injection molding cavity in the blowing chamber.Insert the air hose 10 of blowing in the injection molding core retainer plate 28, its top seal, air flue 29 pass to the annular groove in the air hose 10 anterior outsides.Air hose 10 is fastened on the base plate 6 of back and can not moves, the outer groove that retreats air hose 10 when injection moulding notes core retainer plate 28 exposes, compressed air can enter in the blowing cavity 32, and center push rod 12 is two sections from the punishment of die sinking line, and leading portion has cone 25 and promotes the step 24 of preceding push pedal 2.Return bar 8 and also be divided into two sections, the leading portion end has step to be clamped in the preceding push pedal 2, back segment also has step and has spring 7 to be pressed with this step and 5 of the push pedals in back, an end of the lever block 9 on contact back, the end base plate 6 of back segment, and the other end of lever block 9 withstands in the push pedal 5 of back.The outside link 18 that the preceding push pedal 2 of pulling resets is equipped with in the mould outside.

Described mold work process is as follows:

When being in die opening state, the awl piece 31 on pair cavity plate 4 stretches out plate 17 outer opening under spring 30 power effects.Awl piece 31 contacts plate 3 and draws backward during matched moulds, forms the injection molding cavity of bottleneck, and injection moulding this moment die cavity cover 33 has been inserted in the blowing cavity 32, its end with bore piece 31 and be close to.Under the effect of returning bar 8 and lever block 9, back push pedal 5 is close to pays cavity plate 4, and promptly injection molding core retainer plate 28 has advanced and closed blowing air intake duct 29, has formed injection molding cavity.Inject molten plastic after finishing matched moulds, bottleneck is molded, and the blowing base of body also forms.Injection is ended, and center push rod 12 ejects forward immediately, and center-pole 12 provides power by injection machine, and its precentrum 25 is opened lock 19, continues reach, and push pedal 2 was moved before the step 24 of push rod 12 promoted, and it drives injection moulding die cavity cover 33 and withdraws from blowing cavity 32, the instant heating demoulding.The top of injection moulding die cavity cover 33 retreats to concordant with the bottom surface of blowing cavity 32.Return bar 8 this moment not to lever block 9 application of forces, under the effect of spring 7, back push pedal 5 retreats, and drives notes core cover 28 and retreats to the pore that exposes blowing air flue 29, and center push rod 12 retreats and resets, and touches the outer air supply system air feed of mould and finishes blowing, makes formed product.Treat die sinking after the work-piece cools, dynamic model retreats, awl piece 31 on the plate 17 is under spring 30 power effects, forward, laterally the motion, i.e. the bottleneck injection molding cavity demoulding, dynamic model continues to retreat, move after driving preceding push pedal 2 of outside link 18 pullings and injection moulding die cavity cover 33, injection moulding die cavity cover 33 plays the push rod effect and ejects workpiece, and the one-period action is finished in self-locking after preceding push pedal 2 puts in place.

Claims

1, annotate, the blowing one-time forming die, cover half is arranged, dynamic model, hot runner system, guide pillar is formed, it is characterized in that edge is lined with a piece 15 and fastening between the shape chamber plate 3 of cover half and the noseplate 1,1 of cavity plate 3 and noseplate are equipped with preceding push pedal 2, dynamic model has the cavity plate 4 of paying, there is cushion block 15 itself and back between the base plate 6 and tightens up, pay between cavity plate 4 and the back base plate 6 back push pedal 5 is housed, be equipped with in the mould can make respectively before, back push pedal 2,5 preceding push pedal travel mechanism and the back push pedal travel mechanisms that move and reset, the lock 19 that can tighten automatically when having it to reset in the preceding push pedal 2, the die cavity of cavity plate 3 aligns mutually when matched moulds with the shape chamber of paying cavity plate 4 and is close to, injection moulding die cavity cover 33 before being fixed tightly in the push pedal 2 inserts in the blowing cavity 32 of cavity plate 3 and can move along its axis direction, the injection moulding die cavity that injection molding core retainer plate 28 after being fixed tightly in the push pedal 5 passes in the blowing cavity 32 of paying cavity plate 4 insertion cavity plate 3 overlaps in 33, also can move along its axis direction, promptly in blowing cavity, form the injection moulding die cavity, insert blow air pipe 10 in the injection molding core retainer plate 28, this pipe front end sealing, its air flue 29 passes to the pipe side in this pipe front portion, moving of preceding push pedal 2 can be extracted injection moulding die cavity cover 33 out, moving of back push pedal 5 can be taken out out the gas port that injection molding core retainer plate 28 exposes blow air pipe 10, forms the blowing chamber.

2, by the described mould of claim 1, push pedal travel mechanism is before it is characterized in that, center push rod 12 has the cone 25 of backing down lock 19, and there is the step 24 that promotes preceding push pedal 2 at the cone rear portion, the arm-tie 18 that push pedal 2 resetted before the mould outside can spur when die sinking is housed.

3, by claim 1 or 2 described moulds, it is characterized in that locking 19 is that the spring 20 in the push pedal 2 heads on a dead bolt 21 that can move along the parallel direction of plate before being contained in, it is the inclined-planes that match with cone 25 by center push rod 12 1 sides, and opposite side may be stuck on the latch hook.

4, by the described mould of claim 1, it is characterized in that back push pedal travel mechanism is, have spring 30 to be pressed in and pay between cavity plate 4 and the back push pedal 5, on the base plate 6 of back lever block 9 is housed, the one end in contact is returned bar 8, other end contact back push pedal 5, return bar 8 run through back 5 pairs of cavity plate 4 of push pedal and cavity plate 3 and be fixed tightly in before in the push pedal 2, it is two sections from the punishment of die sinking line, there is boss at its rear portion, spring 7 is pressed between back push pedal 5 and boss, bar 8 is stretched out pay cavity plate 4.

5, by the described mould of claim 1, the position that it is characterized in that paying corresponding cavity plate 3 upper impression on the cavity plate 4 is a diagonal cut joint, and the awl piece 31 that connects two hollows by dovetail groove closes up and constitutes die cavity, behind the awl piece 31 spring 30 that it can be ejected is housed.