CN105599276A - Medical PP infusion bottle blow molding equipment and operating method thereof - Google Patents

Abstract

The invention relates to a medical PP transfusion bottle blow molding equipment and its operation method, including a material receiving device, a moving bottom plate, a fixed template, a device for removing excess material, a tube blank clamp, a cutter, a fixed frame, a guide column, a movable template, Limiting plate, machine head, die mouth plate; the fixed frame is located directly above the fixed template; the excess material removal device is connected to the upper end surface of the die mouth plate through the moving pair; the cutting knife is connected to the upper end surface of the tube blank fixture through the moving pair; The positioning plate is connected to the lower end surface of the movable template by screws, and the guide post and the movable template are in clearance fit. The maximum distance between the movable template and the fixed template should be greater than the maximum width of the infusion bottle body; the movable bottom plate is located directly below the movable template, The vertical central plane of the feeding device is located on the same vertical plane as the axis of the machine head. The invention drives the fixed die plate and the movable die plate to reciprocate through the movement of the moving bottom plate, so that the movable die plate and the fixed die plate in different states can simultaneously extrude the tube blank and inflate the tube blank, thereby realizing continuous production and improving production efficiency.

Description

A kind of medical PP infusion bottle blow molding equipment and its operation method

technical field

The invention belongs to the general molding field of plastic state substances, in particular to a blow molding method and blow molding equipment for handover and movement of model parts, and relates to a medical PP infusion bottle blow molding equipment and an operation method thereof.

Background technique

At present, polypropylene PP plastic bottle large infusion packaging containers occupy a large market share in my country. The product molding generally adopts a two-step extrusion-blow molding method. The extruder extrudes the melted and plasticized parison, and the blow mold is closed. Move to the blow molding device for inflation molding. The key of the two-step method lies in the design of the mold equipment. Considering factors such as production efficiency, cost, and complexity of the mold equipment, many inventors have proposed different solutions.

Chinese patent ZL201320568778.3 discloses a plastic container manufacturing equipment, which uses two molds to continuously exchange positions for continuous blow molding production. The structure is simple and the cost is low, but considering the trajectory of the two molds, the moving mechanism and control are complicated; China Patent ZL201320380005.2 discloses an automatic plastic extrusion blow molding machine. Aiming at the inaccurate positioning technology of blank feeding into the blow molding machine, the method of matching the clamping parts of the transmission mechanism with the lower clamping parts is adopted to realize multi-station The production is simple in structure, but the production efficiency is not high and the cost is higher. These patents all have their deficiencies, are difficult to be used in mass production.

Blow molding parts of infusion bottles require smooth surface, no damage and small holes, full molding, no obvious parting line, etc., and have high hygienic standards for medical devices, and high requirements for blow molding methods and molds. The invention combines the characteristics of the blow molding process of the transfusion bottle to design a medical PP transfusion bottle blow molding equipment and its operation method.

Contents of the invention

Aiming at the problems existing in the above-mentioned prior art, the present invention proposes a medical PP infusion bottle blow molding equipment and its operation method, through which the mold device moves back and forth to achieve the goal of continuous production.

The present invention solves the problems of the technologies described above and is achieved through the following technical solutions:

A medical PP infusion bottle blow molding equipment, including a material receiving device, a movable bottom plate, a fixed template, a device for removing excess material, a tube blank clamp, a cutter, a fixed frame, a machine head, a die plate, a guide column, a movable template, Limiting plate; the fixed frame is located directly above the fixed template, and the central axis of the mold clamping of the movable template and the fixed template is concentric with the axis of the machine head; the lower end surface of the removal device is provided with a dovetail groove, The dovetail groove and the die plate form a moving pair; the lower end surface of the tube blank fixture is also provided with a dovetail groove, and the dovetail groove and the device for removing excess material constitute a moving pair; the lower end surface of the cutter is also provided with a dovetail groove, and the dovetail groove It forms a moving pair with the tube blank fixture; the limit plate is connected to the lower end surface of the movable template by screws, and there is a long hole in the middle of the left end of the limit plate, and the length of the limit plate hole is the maximum distance between the movable template and the fixed template ; The guide post is matched with the movable template, and the fixed template is connected to the left end face of the guide post by screws. The maximum distance between the movable template and the fixed template should be greater than the maximum width of the infusion bottle body; the movable bottom plate is located on the movable template. directly below, the vertical center plane of the moving bottom plate and the axis of the machine head are located on the same vertical plane; flat.

The moving bottom plate also includes a circular guide rail, which is connected to the groove of the moving bottom plate by screws to ensure the stable movement of the moving template.

The fixed frame also includes a tube blank inflation device and a tube blank extrusion device; the tube blank inflation device is connected to the lower end surface of the fixed frame by screws; the tube blank extrusion device is connected to the lower surface of the fixed frame by screws cylindrical surface.

The fixed template also includes a fixed mold base, a limit screw, a mold bottom plate, a plug, a web, a faucet, and a die plate; the die plate is connected and fixed on the upper end surface of the web by screws and positioning pins , the mold bottom plate is connected and fixed on the lower end surface of the web plate through screws and positioning pins; the fixed mold seat is connected to the lower end surface of the mold bottom plate through screws, and the threaded end of the limit screw is screwed into the lower end surface of the mold bottom plate; The water nozzle is connected to the left end face of the web by threads, and a cooling water channel is arranged inside the web, and the plug is in interference fit with the opening end hole of the cooling water channel to ensure the normal flow of cooling water to reduce the mold temperature.

The movable formwork also includes a movable mold base, a mold bottom plate, a plug, a web, a faucet, and a die opening plate; The bottom plate is connected and fixed on the lower end surface of the web through screws and positioning pins; the movable mold base is connected to the lower end surface of the mold bottom plate through screws; the water nozzle is connected to the left end surface of the web through threads, and a For the cooling water channel, the plug is in interference fit with the opening end hole of the cooling water channel to ensure the normal flow of cooling water to reduce the mold temperature.

The tube blank extrusion device also includes a semicircle sleeve, an extruder, and a machine head; the lower cylindrical surface of the extruder is in contact with the inner wall of the semicircle sleeve, and the semicircle sleeve is connected to the lower end surface of the fixed frame by screws The machine head is connected to the front end of the extruder by screws to ensure that the melted and plasticized plastic is extruded from the tubular parison through the machine head in the extruder.

The tube blank blowing device also includes a blowing tube and a mounting frame. A blowing channel is arranged inside the mounting frame. The upper end of the blowing tube is in interference fit with the lower port of the blowing channel to ensure that the pressure air is blown out. Inflated pipe blank.

A kind of operation method of medical PP infusion bottle blow molding equipment, comprises the following steps:

(1) The moving bottom plate drives the fixed template and the movable template to move to the tube blank extrusion station, and the tube blank extrusion device moves downward to extrude the tube blank;

(2) The movable template moves along the guide column on the circular guide rail, the movable template and the fixed template clamp the tube blank, and the tube blank clamp moves to hold the tube blank;

(3) The cutter moves to cut off the tube blank, the tube blank extrusion device moves upwards, and the cutter returns to its position;

(4) The moving bottom plate continues to move, the movable template and the fixed template after mold closing move to the tube billet inflation station, the movable template and the fixed template are in the mold opening state and move to the tube blank extrusion station, and extrusion is carried out at the same time Tube blanks and blown tube blanks complete the entire cycle of blow molding;

(5) After the inflation is completed, the excess material removal device moves to remove excess blank;

(6) The moving bottom plate drives the movable mold base to move, and is separated from the fixed mold base. The maximum separation distance between the movable mold plate and the fixed mold plate is limited by the limit screw, and the infusion bottle is forced to be removed from the mold. The blow molded part breaks away and falls onto the receiving device.

In the step (4), the movable template after extruding the tube blank is moved to the tube blank inflation station together with the fixed template, and the tube blank is blown at the next station, and the remaining material is removed.

The beneficial effects of the invention are: the structure of the mold equipment is simple and compact, the continuous production of infusion bottle products is realized through the reciprocating motion of the mold device, and the production efficiency is improved; a large number of standard parts are used in the mold, which saves research and development and manufacturing costs and shortens product production cycle; the forced demoulding structure is simple and reliable; the parting surface selection, exhaust groove design and cooling waterway design are reasonable, which improves the product yield; the production practice proves that the mold equipment's dynamic and fixed mold actions meet the design requirements, and the infusion bottle blow molding The quality of the parts is stable and suitable for mass production.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the front view of mobile floor of the present invention;

Fig. 3 is the front view of fixing frame of the present invention;

Fig. 4 is the front view of fixed formwork of the present invention;

Fig. 5 is a front view of the movable template of the present invention.

Among them: 101-feeding device, 102-moving bottom plate, 103-fixed template, 104-removal excess material device, 105-pipe blank fixture, 106-cutter, 107-fixed frame, 108-machine head; 109-die opening Plate, 110-guide column, 111-moving template, 112-limiting plate, 201-circular guide rail, 301-blow molding tube, 302-installation frame, 303-tube billet inflation device, 304-semicircle sleeve, 305- Extruder, 306-pipe blank extrusion device, 401-fixed die seat, 402-limit screw, 403-die bottom plate, 404-plug, 405-web plate, 406-water nozzle, 501-moving die seat.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

As shown in Figure 1, a medical PP infusion bottle blow molding equipment includes a material receiving device 101, a moving bottom plate 102, a fixed template 103, a device for removing excess material 104, a tube blank clamp 105, a cutter 106, a fixed frame 107, Machine head 108, die mouth plate 109, guide post 110, movable template 111, limit plate 112; described fixed frame 107 is positioned at the top of described fixed template 103, and the central axis of the mold clamping of described movable template 111 and fixed template 103 Concentric with the axis of the machine head 108, the vertical central plane of the fixed mount 107 is located on the same vertical plane as the plane of the axis of the machine head 108; the lower end surface of the device for removing excess material 104 is provided with a dovetail groove, and the dovetail groove is connected with the machine head 108. The die mouth plate 109 constitutes a moving pair; the lower end surface of the blank tube fixture 105 is also provided with a dovetail groove, and the dovetail groove and the excess material removal device 104 constitute a moving pair; the lower end surface of the cutter 106 is also provided with a dovetail groove, and the dovetail groove It forms a mobile pair with the tube blank clamp 105; the limit plate 112 is connected to the lower end surface of the movable template 111 by screws, and there is a long hole in the middle of the left end of the limit plate 112, and the length of the hole of the limit plate 112 is the same as that of the movable template 111 and the fixed template. The maximum distance between 103; the guide post 110 and the movable template 111 clearance fit, the fixed template 103 is connected to the left end face of the guide post 110 by screws, the maximum distance between the movable template 111 and the fixed template 103 should be greater than the infusion bottle The maximum width of the body; the moving bottom plate 102 is located directly below the movable template 111, and the vertical center plane of the moving bottom plate 102 is located on the same vertical plane as the plane of the axis of the machine head 108; the material receiving device 101 is located directly below the moving bottom plate 102 , the vertical central plane of the material receiving device 101 is located on the same vertical plane as the plane where the axis of the machine head 108 is located.

As shown in Fig. 1 and Fig. 2, the moving base plate 102 includes a circular guide rail 201, which is connected in the groove of the moving base plate 102 by screws, and the circular guide rail 201 and the movable template 111 form a moving pair, and The length of the guide rail 201 is greater than the maximum distance between the movable template 111 and the fixed template 103 .

As shown in Figure 3, the fixed frame 107 also includes a blow molding tube 301, a mounting frame 302, a tube billet inflation device 303, a semicircular sleeve 304, an extruder 305, a tube billet extrusion device 306, and a machine head 108; The tube billet inflation device 303 is connected to the lower end surface of the fixed frame 107 by screws, the tube billet extruder 306 is connected to the lower cylindrical surface of the fixed frame 107 by screws, the axis of the tube billet inflation device 303 and the tube billet extruder The distance between the axes of the output device 306 is the distance between the tube billet inflation station and the tube billet extrusion station; the lower cylindrical surface of the extruder 305 is in contact with the inner wall of the semicircle sleeve 304, and the semicircle sleeve 304 is connected to the lower end surface of the fixed frame 107 by screws, and the head 108 is connected to the front end surface of the extruder 305 by screws; the inside of the mounting frame 302 is provided with a blowing channel, and the upper end of the blowing tube 301 is connected to the The lower port of the blowing channel is interference fit, and the distance between the axis of the machine head 108 and the axis of the blowing tube 301 is the distance between the moving template 111 and the fixed template 103 once.

As shown in Figure 4, the fixed template 103 also includes a fixed mold base 401, a limit screw 402, a mold bottom plate 403, a plug 404, a web 405, a nozzle 406, a die plate 109, and a limit plate 112; The die mouth plate 109 is connected and fixed on the upper end surface of the web 405 by screws and positioning pins, the die bottom plate 403 is fixed on the lower end surface of the web 405 by screws and positioning pins, and the fixed mold base 401 is connected by screws On the lower end surface of the die base plate 403, ensure that the fixed template 103 can work normally; the threaded end of the stop screw 402 passes through the limit plate 112 and is screwed into the lower end face of the die base plate 403; the water nozzle 406 is threaded. On the left end surface of the web 405, a cooling water channel is arranged inside the web 405, and the plug 404 is in interference fit with the opening end hole of the cooling water channel to ensure that the cooling water flows normally to reduce the mold temperature; the web 405 The front face is provided with exhaust grooves to ensure smooth exhaust during the inflation process.

As shown in Figure 5, the movable template 111 also includes a movable mold base 501, a mold bottom plate 403, a plug 404, a web 405, a nozzle 406, and a die plate 109; Connected and fixed on the upper end surface of the web 405, the mold bottom plate 403 is connected and fixed on the lower end surface of the web 405 by screws and positioning pins, and the movable mold base 501 is connected to the lower end surface of the mold bottom plate 403 by screws to ensure the dynamic The template 111 can work normally; the water nozzle 406 is screwed to the left end surface of the web 405, and a cooling water channel is also arranged inside the web 405, and the plug 404 is interference fit with the opening end hole of the cooling water channel , to ensure the normal flow of cooling water to reduce the mold temperature; the front surface of the web 405 is also provided with exhaust grooves to ensure smooth exhaust during the inflation process.

The operation method of the above-mentioned a kind of medical PP transfusion bottle blow molding equipment comprises the following operation steps:

(1) In conjunction with accompanying drawing 1, the movable platen 111 and the fixed platen 103 are in the mold opening state, and the movable bottom plate 102 drives the fixed platen 103 and the movable platen 111 to move to the tube blank extrusion station, and the tube blank Extrusion device 306 (referring to accompanying drawing 3) moves down, extrudes tube blank;

(2) In conjunction with accompanying drawing 1, accompanying drawing 5, described movable mold base 501 moves along circular guide rail 201, makes movable template 111 move along described guide post 110, and movable template 111 and fixed template 103 close molds and embrace tube blank, The tube blank fixture 105 moves to hold the tube blank;

(3) In conjunction with accompanying drawing 1, the cutting knife 106 moves to cut off the tube blank, and at the same time the tube blank extruding device 306 (see accompanying drawing 3) moves upwards to prevent the tube blank cutting edge from sticking, and the cutter 106 returns to its position;

(4) In conjunction with accompanying drawings 1 and 3, the movable bottom plate 102 continues to move, and after mold closing, the movable template 111 and the fixed template 103 move to the tube billet inflation station, and the tube billet inflation device 303 descends to the blow molding position, and the blow molding Expand the tube blank, the movable platen 111 and the fixed platen 103 are in the mold opening state and move to the tube blank extrusion station to extrude the tube blank, close the mold, cut the tube blank, and inflate the tube blank at different stations at the same time and extruding the tube blank, the mobile bottom plate 102 continues to move to complete the respective blow molding process;

(5) In conjunction with accompanying drawing 1, after the inflation is completed, under the action of the removal device 104, the excess blank of the tube blank beyond the die plate 109 is removed;

(6) In conjunction with accompanying drawing 1, the movable bottom plate 102 moves again, and the moving platen 111 and the fixed platen 103 in the mold closing state move to the tube billet inflation station again, and the tube billet is inflated, and the remaining material removal device 104 moves to remove Surplus material, moving bottom plate 102 drives described movable die base 501 to move (see accompanying drawing 5), and described fixed die base 401 (seeing accompanying drawing 4) is separated, and is limited by the stop screw 402 (seeing accompanying drawing 4) The maximum separation distance between the template 111 and the fixed template 103, the blow molded part of the infusion bottle is separated by forced demoulding, and falls onto the material receiving device 101 to complete a blow molding production cycle, and then move the bottom plate 102 Drive the mold device to move in the opposite direction, and continue the above process.

Claims (9)

1. a medical PP infusion bottle apparatus for blow moulding, comprises material-receiving device (101), movable base plate (102), solid plate(103), excision excess stock device (104), pipe fixture (105), cutting knife (106), fixed mount (107), head (108),Die plate (109), guide pillar (110), moving platen (111), limiting plate (112), is characterized in that: described fixed mount (107)Be positioned at directly over described solid plate (103), the central axis of described moving platen (111) and solid plate (103) matched moulds with described inThe axis of head (108) is concentric; Described excision excess stock device (104) lower surface is provided with dovetail groove, dovetail groove and described mouldOralia (109) forms moving sets; Described pipe fixture (105) lower surface is also provided with dovetail groove, dovetail groove and excision cloutDevice (104) forms moving sets; Described cutting knife (106) lower surface is also provided with dovetail groove, dovetail groove and pipe fixture (105)Form moving sets; Described limiting plate (112) is connected by screw in the lower surface of moving platen (111), limiting plate (112) left sideThere is slotted hole the centre of end, and the length in limiting plate (112) hole is the ultimate range between moving platen (111) and solid plate (103);Described guide pillar (110) and moving platen (111) matched in clearance, solid plate (103) is connected by screw at guide pillar (110)Left side, the ultimate range between moving platen (111) and solid plate (103) should be greater than the Breadth Maximum of infusion bottle body; InstituteState movable base plate (102) be positioned at moving platen (111) under, the vertical median plane of movable base plate (102) and head (108)Axis be positioned at same perpendicular; Described material-receiving device (101) is positioned under movable base plate (102), material-receiving device (101)Vertical median plane and the axis of head (108) be positioned at same perpendicular.

2. the medical PP infusion bottle of one according to claim 1 apparatus for blow moulding, described movable base plate (102) also wrapsDraw together round guide (201), it is characterized in that: described round guide (201) is connected by screw the groove in movable base plate (102)In groove.

3. the medical PP infusion bottle of one according to claim 1 apparatus for blow moulding, described fixed mount (107) also comprisesPipe huffing device (303), pipe extrusion device (306), is characterized in that: described pipe huffing device (303) passes through spiral shellNail is connected to the lower surface of fixed mount (107); Described pipe extrusion device (306) is connected by screw in fixed mount (107)The lower face of cylinder.

4. the medical PP infusion bottle of one according to claim 1 apparatus for blow moulding, described solid plate (103) also comprisesCover half seat (401), stop screw (402), baffle plate (403), plug (404), web (405), water nozzle (406),Die plate (109), is characterized in that: described die plate (109) is fastened on described web (405) by screw and alignment pinUpper surface, described baffle plate (403) is fastened on web (405) lower surface by screw and alignment pin; Described cover halfSeat (401) is connected by screw in the lower surface of baffle plate (403), at the bottom of the end of thread of described stop screw (402) screws in mouldThe lower surface of plate (403); Described water nozzle (406) is threaded connection in the left side of web (405), in web (405)Inside is provided with cooling water channel, the opening stomidium interference fit of described plug (404) and described cooling water channel.

5. the medical PP infusion bottle of one according to claim 1 apparatus for blow moulding, described moving platen (111) also comprisesDynamic model seat (501), baffle plate (403), plug (404), web (405), water nozzle (406), die plate (109), itsBe characterised in that: described die plate (109) is fastened on the upper surface of described web (405), institute by screw and alignment pinState baffle plate (403) and be fastened on web (405) lower surface by screw and alignment pin; Described dynamic model seat (501) passes throughScrew is connected to the lower surface of baffle plate (403); Described water nozzle (406) is threaded connection in the left side of web (405),Also be provided with cooling water channel in web (405) inside, described plug (404) is joined with the opening stomidium interference of described cooling water channelClose.

6. according to claim 1 and the medical PP infusion bottle of one claimed in claim 3 apparatus for blow moulding, described pipe is extrudedDevice (306) also comprises half round buss (304), extruder (305), head (108), it is characterized in that: described extruder(305) the lower face of cylinder contacts with described half round buss (304) inwall, and half round buss (304) is connected by screw fixingThe lower surface of frame (107); Described head (108) is connected by screw the front end face in extruder (305).

7. according to claim 1 and the medical PP infusion bottle of one claimed in claim 3 apparatus for blow moulding, described pipe blowingDevice (303) also comprises blowing pipe (301), installing rack (302), it is characterized in that: establish described installing rack (302) insideBe equipped with blowing passage, the upper end of described blowing pipe (301) and described blowing passage lower port interference fit.

8. the operational method of a kind of medical PP infusion bottle apparatus for blow moulding according to claim 1, is characterized in that: bagDraw together following steps:

(1) described movable base plate (102) drive described solid plate (103) and described moving platen (111) move to pipe squeezeGo out station, described pipe extrusion device (306) moves down, and extrudes pipe;

(2) moving platen (111) is upper mobile along described guide pillar (110) at described round guide (201), moving platen (111) andSolid plate (103) matched moulds is embraced pipe, and described pipe fixture (105) is mobile, buttresses pipe;

(3) described cutting knife (106) is mobile, cuts off pipe, and pipe extrusion device (306) moves up, cutting knife (106)Return;

(4) movable base plate (102) continues to move, and the moving platen (111) after matched moulds moves to pipe with solid plate (103)Inflation station, moving platen (111) moves to described pipe with solid plate (103) in die opening state and extrudes station, enters simultaneouslyRow is extruded pipe and inflation pipe, completes the whole periodic process of blowing;

(5) after inflation finishes, the unnecessary material base of the mobile excision of described excision excess stock device (104);

(6) movable base plate (102) drives described dynamic model seat (501) mobile, separates, by institute with described cover half seat (103)State the maximum separation between stop screw (402) restriction moving platen (111) and solid plate (103), adopt forced stripper mechanismMode allows described infusion bottle blowing part depart from, and falls to described material-receiving device (101).

9. the operational method of a kind of medical PP infusion bottle apparatus for blow moulding according to claim 8, is characterized in that: instituteState the moving platen (111) of extruding after pipe in step (4) and move to pipe inflation station together with solid plate (103), carry outThe inflation pipe of next station, excision clout.