CN101264663B

CN101264663B - Die for injecting and blowing plastic hollow container forming container by one-step method and single working-station, and application thereof

Info

Publication number: CN101264663B
Application number: CN2008100257496A
Authority: CN
Inventors: 黄锦强
Original assignee: XINHUA MEDICINE PACKAGE CO Ltd TAISHAN
Current assignee: XINHUA MEDICINE PACKAGE CO Ltd TAISHAN
Priority date: 2008-01-10
Filing date: 2008-01-10
Publication date: 2010-09-01
Anticipated expiration: 2028-01-10
Also published as: BRPI0816423A2; CN101264663A; CA2695927C; WO2009086749A1; CA2695927A1

Abstract

The invention relates to a mould of moulded product for hollow container of injection molding and blow molding with one step method and simplex station, belonging to the technical field of plastic processing and comprising an injection molding mould and a blow molding mould, which is characterized in that the injection molding mould comprises a pair of right and left arranged moving mould and fixed mould in parallel, the opening and closing of the moving mould and the fixed mould are controlled by the first group of driving mechanism; at least a row of longitudinally arranged bottle mold cavities are located on the fixed mould, at least a row of longitudinally arranged mandrel rods with gas ports are fixed on the moving mould and corresponding one by one to the bottle mold cavity arranged on the fixed mould; one blowing mould component is arranged on each row of mandrel rod, each blowing mould component comprises two templets and arranged separately on the front side and the back side of the mandrel rod, at least a row of finished mould orifices are arranged on the inner side of each templet and corresponding one by one to every mandrel rod, the opening and closing of the two templets are controlled by the third driving mechanism. The mould of the invention has the advantages that the blow moulding in injection-moulded parison and hollow container can be truly realized on the same mould, meanwhile, the invention discloses also a method of production adopting the mould.

Description

One-step method, single station are annotated, the mould and the application thereof of blowing material hollow container shaped article

Technical field

The invention belongs to technical field of plastic, be specifically related on injection machine, once finish injection moulding with a mold---the particular manufacturing craft of blow molded plastic hollow container shaped article is mainly used on the common injection machine.

The invention still further relates in plastic processing, on common injection machine, fix with the single station of one-step method, core, blowing core and parison do not rotate or not translation in the blowing process, once finish the method for injection moulding-blow molded plastic hollow container shaped article, be mainly used on the common injection machine single station and fixedly in the double one-step injection blower hollow container mould of core.

Background technology

In the blowing hollow product molding process of plastics, main " squeeze-blowing " and " annotating-blow " the two kinds of technologies that adopt.Employing extrudes-hollow product that blow molding method is produced, and the protrusion crack that can not eliminate appears on product surface, and make product surface not attractive in appearance, smooth.And unnecessary leftover pieces unavoidably appear, increase the cost of formed product and the waste of raw material.Owing to these reasons, developed a kind of two-step method and annotated---blow the method for hollow molding blow molded product.Its method is earlier to inject parison on injection machine, forwards that the heating parison is blown into the hollow container product again on the blow moulding machine to again, and in this two-step method processing method, production link is many, and equipment investment is big, and complex forming technology is easy to generate parison and pollutes.Recently, in order to overcome above shortcoming, developed the forming method (patent No. ZL95235116.1 that a kind of " three work station one-step injection blowings " produces plastic hollow vessel; Number of patent application 92208083.6), three work station one-step injection blowings are that " injection moulding, blowing " is finished on same machine.It is that three stations are spent into the equilateral triangle distribution with 120 that the notes of three stations " notes blow " hollow container bottle blow machine, and first station is the injection moulding station, and second station is the blow molding station, and the 3rd station is for taking off a bottle station.Three stations can move simultaneously, and shortcoming is: the equipment of annotating-blow hollow container is to annotate-blow special equipment, and the production and processing cycle is long, the expense height, and equipment investment is big, complex process, the Mould Machining difficulty is big, is difficult for grasping; Owing to adopt the movable and rotary type core, the typing of product parison centering is relatively poor, is easy to generate the even quality problems of product wall unevenness, and system configuration requires high, and adaptability is relatively poor.

In view of above-mentioned notes blow the some shortcomings that the hollow product special equipment exists, developed a kind of " one-step injection blower with double positions " plastic hollow vessel forming method (application for a patent for invention numbers 200610096985.8 and 200510094402.3 and utility model patent ZL 200620067438.2), its method is that a mold directly is installed on common injection machine, the notes blow molding die is set on the mould, its dynamic model is arranged to the core rod, behind the plug injecting preform, drive rotation by rotating shaft and carry out the blow molding hollow product again for 90 ° or 180 °.Plug was bad to neutrality when this method was located in blowing, blowing hollow container in uneven thickness, and product quality is not easy to guarantee.Patent of invention (application number 200410002642.1) and utility model patent (patent No. ZL 01255074.4), it mainly is applicable in the horizontal parallel-moving type mould of two work station one-step.This method be the parison of injection moulding after injection mold injection mo(u)lding die sinking, plug and parison move to together and just carry out blowing on the blow mold of injection machine mould and form product.This method controlling of production process difficulty, mould structure is not compact, and poor location is bad to neutrality, and product quality is not easy to guarantee.

Summary of the invention

The objective of the invention is at above-mentioned the deficiencies in the prior art part, a kind of mould that can once finish injection moulding, blow molding plastic product on common injection machine is provided.

Another object of the present invention provides a kind ofly fixes with the single station of one-step method, core on common injection machine, and core does not rotate or not translation, once finishes the method for injection moulding-blow molded plastic hollow container shaped article.

For achieving the above object, a first aspect of the present invention provides the mould of a kind of one-step method, single station notes, blowing material hollow container shaped article, and it comprises injection mould assembly and blow molding die assembly; The injection mould assembly comprises dynamic model and the cover half that be arranged in parallel about level, and dynamic model is by the folding of first group of driving mechanisms control itself and cover half; Cover half is provided with the blank bottle mold chamber that at least one row vertically arranges, and is fixed with the plug that has inflatable mouth that at least one row vertically arranges on the dynamic model, and is corresponding one by one with the blank bottle mold chamber on the cover half; The configuration one blow molding die assembly of every row's plug, each blow molding die assembly comprises two blow molding modules, lay respectively at the both sides, front and back of above-mentioned plug, the medial surface of each template is provided with at least one row's finishing die rifle, corresponding one by one with each plug, and the folding of two blow molding modules is by the 3rd driving mechanisms control.

Mould of the present invention can be directly installed on the common injection machine, and after injection mould was finished the parison injection moulding, injection mould was opened, and then the blow molding die matched moulds, carries out blow molding.

Above-mentioned cover half comprises sprue bush, hot flow path, blank bottle mold chamber plate; Hot flow path is to divide equally open runner; The blank bottle mold chamber that one row vertically arranges is set on the plate of the blank bottle mold chamber of described every projection, and bottom, blank bottle mold chamber is provided with the runner injection hole.

But the medial surface of above-mentioned dynamic model is provided with the push pedal of a horizontal direction move left and right, and plug runs through this push pedal, and push pedal lateral surface supporting blow molding die, the moving by second driving mechanisms control of this push pedal.

There is a cavity above-mentioned plug inside, and the bottom of cavity communicates with cylinder on being arranged on inlet plate, and the top of cavity sets out gas port, in addition, also is provided with a switching that is pressed with the core rod control gas outlet of a spring at cavity inside.

A second aspect of the present invention provides a kind ofly fixes with the single station of one-step method, core on common injection machine, core does not rotate or not translation, once finish the method for injection moulding-blow molded plastic hollow container shaped article, be mainly used on the common injection machine single station and fixedly in many rows one-step injection blower hollow container mould of core.

Its method is on common injection machine, and a secondary above-described mould is installed, and according to injection moulding, two process segments of blowing carry out; Injection phase comprises: mould closure, injection moulding, mold open; The blowing stage comprises: blow molding module closure, blowing moulding is opened blow molding module and moulding hollow container and is ejected.It is characterized in that: described injection phase and in the blowing stage, behind the mold open, the moulding plug is defined in the dynamic model does not all the time need actuating unit to drive rotation or translation; The injection moulding blank is attached on the plug, and behind the mould complete opening, the blow molding module of core both sides is closed under the effect of push rod, and after the complete closure of blowing module, plug is inner blows, and finishes the blow molding of hollow container.

Described injection phase has only the moulding of injection blank between injection and die sinking, need not pressurize and cooling and shaping, and this moment, injection machine was in the matched moulds state.

The closure of the blow molding module in described blowing stage, blowing moulding and unlatching eject all and finish on same mould.

Mold open of the present invention is meant that plug follows all the time that moving platen open to move and invariant position, and the parison blank is attached on the plug.Plug does not need actuating unit to drive rotation or translation.

Blow molding module closure of the present invention, be meant that the blow molding module is arranged on the plug both sides, directly drive push rod by the 3rd drives structure (for example, oil cylinder or other drive unit) and make the blow molding module start closure, the center of blow molding module is coaxial with the plug that has parison.

Mould of the present invention, its plug can be single row or multiple rows and arrange, but a multi-cavity mold carries out the injection blow moulding of hollow container.

Parison, blow mold and dynamic model are one, the blow molding module is installed in the both sides of dynamic mould core, finish the injection moulding of parison at injection mold after, the dynamic model of injection mold retreats with parison, blow mold and opens, core and parison are fixing all the time on dynamic model, do not need actuating unit to drive rotation or translation.The direct matched moulds of blow molding module then carries out blow molding, and this mould is injection moulding--the blow molding of once finishing hollow plastic product on common injection machine.Because core and injecting preform invariant position all the time on dynamic model, core is good to neutrality, and The mould features compact structure is installed easily, and operating maintenance is simple, and one goes on foot and finishes from the parison to goods, and product surface does not have crack, the easier assurance of product quality.

The present invention has the following advantages compared with the prior art: 1, directly use common injection machine, the production technology link that overcomes two step method and two station methods is many, the shortcoming that equipment investment is big; 2, production automation degree and production efficiency height; 3, The mould features compact structure is installed easily, and operation is easy to maintenance; 4, one step finished from the parison to goods, and good to neutrality, product surface does not have crack, the easier assurance of product quality.

Description of drawings

Fig. 1 is the scheme of installation of the present invention on common injection machine;

Fig. 2 is the vertical view of Fig. 1;

Fig. 2 A is the structural representation of mould that the present invention chats;

Fig. 2 B is the vertical view of Fig. 2 A;

Fig. 2 C is the partial enlarged drawing of Fig. 2 B;

Fig. 3 A is the structural representation behind the mould matched moulds first time of the present invention;

Fig. 3 B is the vertical view of Fig. 3 A;

Fig. 4 A is the structural representation after the mould of the present invention die sinking for the first time;

Fig. 4 B is the vertical view of Fig. 4 A;

Fig. 5 A is the structural representation behind the mould matched moulds second time of the present invention;

Fig. 5 B is the vertical view of Fig. 5 A;

Fig. 6 A is the structural representation that carries out blow molding;

Fig. 6 B is the vertical view of Fig. 6 A;

Fig. 7 A is the structural representation after the mould of the present invention die sinking for the second time;

Fig. 7 B is the vertical view of Fig. 7 A;

Fig. 8 A is the structural representation of reflection push pedal operating state of the present invention;

Fig. 8 B is the vertical view of Fig. 8 A.

Now the invention will be further described in conjunction with the accompanying drawings and embodiments:

The specific embodiment

As shown in Figure 1, 2, the present invention includes injection mould assembly and blow molding die assembly.

The injection mould assembly comprises dynamic model 1 and the cover half 2 that left and right directions is provided with.Dynamic model 1 is by its move left and right in the horizontal direction of one group of driving mechanisms control, thus can with cover half 2 opening and closing.

Cover half 2 comprises sprue bush 203, hot flow path 204, blank bottle mold chamber plate 205.Hot flow path 204 is to divide equally open runner.The blank bottle mold chamber 201 that one row vertically arranges is set on the blank bottle mold chamber plate 202 of the every projection that is provided with on the

cover half

2, and 201 bottoms, blank bottle mold chamber are provided with the runner injection hole.Cover half is fixedlyed connected with the injection moulding end 302 that common injection machine is fixed.Blank bottle mold chamber plate is a convex shape, and when being beneficial to mould, the blow molding module on the following dynamic model embeds the both sides of blank bottle mold chamber plate.

Be fixed with the plug 101 that two rows have inflatable mouth on the dynamic model 1, corresponding one by one with the blank bottle mold chamber 201 on the above-mentioned cover half 2.Dynamic model 1 is made up of inlet plate assembly, substrate 103 and push pedal 102, push pedal 102 be arranged on substrate 103 with cover half to a right side, it is subjected to the control of second group of driving mechanism can be with respect to substrate 103 left and right sides translation in the horizontal direction, be used for finished product is released, plug 101 is arranged on the substrate 103, and runs through this push pedal 102.There is a cavity 1011 plug 101 inside, the bottom of cavity communicates with gas 1011 on being arranged on inlet plate 6, and the top of cavity sets out gas port 1013, in addition, also is provided with a switching that is pressed with the core rod 1014 control gas outlets 1013 of a spring 1015 in cavity 1011 inside.

The outside of push pedal 102, promptly relative with a cover half side is fixed with blow molding die assembly 4.Blow molding die assembly 4 of every row plug configuration, blow molding die assembly 4 is made up of two blow molding modules 401,402, lay respectively at the left and right sides of the every row plug 101 on the dynamic model 1, both move forward and backward (promptly vertical with the direction of the horizontal move left and right of dynamic model) in the horizontal direction by 5 controls of the 3rd group of hydraulic drive mechanism, thereby realize the folding of two modules 401,402.In the present embodiment, because plug 101 has two row, thereby be correspondingly provided with two cover blow molding die assemblies.The medial surface of each module 401,402 of blow molding die assembly is provided with one and lines up pattern chamber 403, and is corresponding one by one with each plug 101.

The left of dynamic model 1 is connected with inlet plate assembly 6.

Processing method comprises injection moulding, the blowing process segment.Injection phase is made up of following operation: injection machine matched moulds, parison injection moulding and mold open; The blowing stage is made up of following operation: the blow molding die closure, to blow, and the blow molding die die sinking is given plasticizing and product and is ejected.

After mould matched moulds injection bottle base is finished, dynamic model moves, and drives plug and moves together, and it is motionless that plug is fixed on dynamic model all the time, the injection moulding blank is attached on the plug, behind the mould complete opening, the blow molding module is under oil cylinder promotes, and push rod makes blowing module closure, after the complete closure of blowing module, blown simultaneously by the promotion of cylinder in plug inside, finished the blow molding of hollow container by the blowing module.After blowing is finished, eject moulding moulded goods by push pedal, injection machine begins to carry out next injection moulding-blowing circulation more then.Technical process is in injection phase, mould closure, injection moulding bottle base.Behind the mold open, enter the blowing stage, at this moment, blow molding module closure, the blowing moulding hollow container is opened blow molding module and moulding hollow container and is ejected.Its technical characterictic is injection phase and in the blowing stage, behind the mold open, the moulding plug is fixed on all the time in the dynamic model and does not move, the injection blank is attached on the plug, behind the mould complete opening, blow molding module closure begins to carry out, after the complete closure of blowing module, the plug inner tensile is blown, and finishes the blow molding of hollow container.Injection phase has only the moulding of injection blank between injection and die sinking, need not pressurize and cooling and shaping, and this moment, injection machine was in the matched moulds state.The closure of the blow molding module in blowing stage, blowing moulding and unlatching eject all and finish on same mould.

Detailed process is as follows:

Shown in Fig. 3 A, Fig. 3 B, injection phase comprises: the injection mould closure: dynamic model 1 is from a left side and dextrad cover half 2 advances, and plug 101 is inserted in the blank bottle mold chamber 201, and the blank bottle mold chamber is to mandrel outer surface injection moulding blank 7.After injection moulding finishes, shown in Fig. 4 A, Fig. 4 B, mold open: dynamic model 1 horizontal left, finish injection moulding thereby separate with cover half 2.

Shown in Fig. 5 A, 5B, the blowing stage comprises: under the driving of the 3rd driving mechanism 5 (hydraulic mechanism), two blow molding modules, 401,402 closures of blow molding die, the shaping mold cavity 403 of forward and backward both sides module closes up, and jointly every plug 101 is enclosed in the center.

Shown in Fig. 6 A, 6B, to plug 101 inner air blowings, the blank 7 of its outer surface expands and is full of the space that left and right sides shaping mold cavity 403 surrounds, and forms moulded products 8 by air blowing board component 6.

Shown in Fig. 7 A, 7B, after blowing was finished, two blow molding modules were opened in 401,402 minutes, exposed moulded products 8.

Shown in Fig. 8 A, 8B, push pedal 102 is to right translation, thereby ejects moulded products 8, and moulded products 8 drops out and is collected from the space between dynamic model 1, the quiet mould 2.

Thereby a production cycle is finished at this point, and injection machine begins to carry out next injection moulding more then---the blowing circulation.

Adopt mould of the present invention, the production technology link that can overcome two step method and two station methods is many, the shortcoming that equipment investment is big, The mould features compact structure is installed easily, operating maintenance is simple, one step finished from the parison to goods, and good to neutrality, product surface does not have crack, the easier assurance of product quality has improved automaticity and production efficiency greatly.

Claims

1. the mould of one-step method, single station notes, blowing material hollow container shaped article comprises injection mould assembly and blow molding die assembly; The injection mould assembly comprises dynamic model and the cover half that be arranged in parallel about level, and dynamic model is by the folding of first group of driving mechanisms control itself and cover half; Cover half is provided with the blank bottle mold chamber that at least one row vertically arranges, and is fixed with the plug that has inflatable mouth that at least one row vertically arranges on the dynamic model, and is corresponding one by one with the blank bottle mold chamber on the cover half; Every row's plug disposes a blow molding die assembly, each blow molding die assembly comprises two injection mo(u)lding modules, lays respectively at the both sides, front and back of above-mentioned plug, and the medial surface of each module is provided with at least one pattern chamber of lining up, corresponding one by one with each plug, and the folding of two modules is by the 3rd driving mechanisms control.

2. mould according to claim 1, it is characterized in that: cover half comprises sprue bush, hot flow path, blank bottle mold chamber plate; Hot flow path is to divide equally open runner; The blank bottle mold chamber that one row vertically arranges is set on the plate of the blank bottle mold chamber of described every projection, and bottom, blank bottle mold chamber is provided with the runner injection hole.

3. mould according to claim 1 is characterized in that: but the medial surface of described dynamic model is provided with the push pedal of a horizontal direction move left and right, and plug runs through this push pedal, and push pedal lateral surface supporting blow molding die, the moving by second driving mechanisms control of this push pedal.

4. mould according to claim 1, it is characterized in that: there is a cavity plug inside, the bottom of cavity communicates with cylinder on being arranged on inlet plate, and the top of cavity sets out gas port, in addition, also be provided with a switching that is pressed with the core rod control gas outlet of a spring at cavity inside.

5. mould according to claim 1 is characterized in that: the following and inlet plate assembly of described dynamic model is connected.

6. mould according to claim 1 is characterized in that: described driving mechanism is hydraulic drive mechanism, pneumatic drive mechanism, electromagnetic drive mechanism or mechanical drive mechanism.

7. on common injection machine, fix for one kind with the single station of one-step method, core, core does not rotate or not translation, once finish the method for injection moulding-blow molded plastic hollow container shaped article, be on common injection machine, the described mould of one secondary claim 1 is installed, is carried out according to injection moulding, two process segments of blowing; Injection phase comprises: mould closure, injection moulding, mold open; The blowing stage comprises: blow molding module closure, blowing moulding, opening blow molding module and moulding hollow container ejects, it is characterized in that: described injection phase and in the blowing stage, behind the mold open, the moulding plug is fixed in the dynamic model all the time, does not need actuating unit to drive rotation or translation; The injection moulding blank is attached on the plug, and behind the mould complete opening, the blow molding module of core both sides is closed under the effect of push rod, and after the complete closure of blowing module, plug is inner blows, and finishes the blow molding of hollow container;

Described injection phase has only the moulding of injection blank between injection and die sinking, need not pressurize and cooling and shaping, and this moment, injection machine was in the matched moulds state;

8. method according to claim 7, it is characterized in that the closure of the blow molding module in blowing stage is promoted the push rod fixedly connected with the blow molding module by driving mechanism, the blow molding module is opened and closed, and the center of forming module is coaxial with the plug that has parison.

9. method according to claim 7 is characterized in that, its plug can be single row or multiple rows and arranges, and the cavity quantity of corresponding blow molding module is corresponding with it, injection blow moulding that can a mould is arranged more, multi-cavity carries out hollow container.