CN113787701B

CN113787701B - Bottle blowing machine and bottle blowing production method thereof

Info

Publication number: CN113787701B
Application number: CN202111082806.6A
Authority: CN
Inventors: 章方雨
Original assignee: Tianliang Intelligent Equipment Shanghai Co ltd
Current assignee: Tianliang Intelligent Equipment Shanghai Co ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2023-03-24
Anticipated expiration: 2041-09-15
Also published as: CN113787701A

Abstract

The invention discloses a bottle blowing machine and a bottle blowing production method thereof, belonging to the field of plastic product processing. The die assembly forming assembly comprises a movable die turntable and a fixed die turntable which rotate synchronously, a plurality of movable dies are mounted on the movable die turntable, a plurality of fixed dies are mounted on the fixed die turntable, and the movable dies are assembled and separated with the fixed dies in the movable die control component. The quantitative discharging assembly comprises an extrusion die head, a material nozzle assembly and a material nozzle driving device, and the material nozzle driving device drives the material nozzle assembly to do axial linear motion, so that the discharging amount of the material nozzle assembly is controlled to adapt to the wall thickness change of the bottle.

Description

Bottle blowing machine and bottle blowing production method thereof

Technical Field

The invention relates to the field of plastic product processing, in particular to a bottle blowing machine and a bottle blowing production method thereof.

Background

The bottle blowing machine (blowmolding machine) is a machine for blowing bottles, and the most obvious explanation is a machine capable of blowing plastic particles (softened into liquid) or finished bottle blanks into bottles by certain technological means. The bottle blowing machine is convenient and fast, has large molding quantity, replaces most of manual bottle blowing after the bottle blowing machine appears, and is adopted by most beverage enterprises.

The bottle blowing machine is a device for manufacturing plastic particles into hollow containers through a blow molding process, and common machines include a hollow extrusion blow molding machine which uses PP and PE for one-step molding, an injection stretch blow molding machine which uses PET, PC or PP for two-step molding, and a newly developed multilayer hollow extrusion blow molding and stretch blow molding.

In order to improve the production efficiency, a plurality of pairs of movable dies and fixed dies which are arranged in a straight line and used in a matched mode are installed on the existing bottle blowing machine, namely, the linear bottle blowing machine, an extrusion die head of the linear bottle blowing machine comprises a plurality of runners, each runner is connected with an extrusion nozzle, when a bottle is blown, each extrusion nozzle conveys a bottle blank between the pair of movable dies and the fixed dies which are used in the matched mode, and then the bottle is formed through die assembly.

However, in the linear bottle blowing machine in the prior art, because one extrusion die head corresponds to a plurality of extrusion nozzles, the size of the extrusion die head is limited, and the discharging speed of the extrusion nozzles is slow, so that the production efficiency of the bottle blowing machine is influenced. In addition, for the production of bottles with inconsistent wall thickness, the extrusion nozzles of the linear bottle blowing machine are difficult to control the discharge amount, and the discharge amount of each extrusion nozzle is different and difficult to adjust, so that the consistency of the product is limited.

Disclosure of Invention

The invention aims to provide a bottle blowing machine and a bottle blowing production method thereof, aiming at solving the problems that the bottle blowing machine in the prior art is low in production efficiency and the thickness of a bottle wall is difficult to control by controlling the discharge amount of an extrusion nozzle.

In order to achieve the purpose, the technical scheme of the invention is as follows:

in a first aspect, the invention provides a bottle blowing machine, which comprises a rack, and a quantitative discharging component and a die assembly forming component which are arranged on the rack, wherein the die assembly forming component is positioned right below the quantitative discharging component;

the quantitative discharging assembly comprises an extrusion die head, a material nozzle assembly and a material nozzle driving device; the extrusion die head is fixedly arranged on the rack, a feed inlet and a discharge outlet are formed in the surface of the extrusion die head, and a flow channel for connecting the feed inlet and the discharge outlet is formed in the extrusion die head; the material nozzle assembly comprises an adapter tube and a material nozzle, the adapter tube is fixed on the extrusion die head, the upper end of the adapter tube is connected with the discharge port, the material nozzle is annularly and axially movably sleeved on the outer wall of the adapter tube, a conical quantitative control block is fixed on the inner wall of the material nozzle, and the small end of the quantitative control block is aligned to the lower end of the adapter tube; the material nozzle driving device is fixedly arranged on the extrusion die head or the rack, and the output end of the material nozzle driving device is fixedly connected with the material nozzle so as to drive the material nozzle to do axial linear motion;

the mold closing and forming assembly comprises a mechanical mold closing assembly and an air pressure conveying assembly;

the mechanical die assembly component comprises a die assembly support fixedly arranged on the rack, a main shaft rotatably connected to the die assembly support, a main shaft driving device fixedly arranged on the die assembly support and mechanically connected with the main shaft, and a movable die turntable and a fixed die turntable which are coaxially fixed on the main shaft; the front surface of the movable mold turntable is opposite to the front surface of the fixed mold turntable, a plurality of fixed molds are uniformly and fixedly arranged on the same circumference of the front surface of the fixed mold turntable, the same number of movable molds are uniformly arranged on the same circumference of the front surface of the movable mold turntable, the movable molds are connected with sliding pieces, and the sliding pieces are connected to the movable mold turntable in a sliding manner along the direction parallel to the axis of the main shaft;

the mechanical die assembly component also comprises a movable die control component positioned on one side of the back surface of the movable die turntable, the movable die control component is columnar or annular, the movable die control component is fixedly arranged on the die assembly bracket, and the movable die control component and the main shaft share the same axis; an annular groove is formed in the circumferential outer wall of the movable mold control component, and a sliding block matched with the annular groove is connected to the free end of each sliding piece; the annular groove comprises a mold closing groove section and a mold opening groove section which are respectively positioned in two parallel planes, the distance between the mold closing groove section and the movable mold rotating disc is smaller than the distance between the mold opening groove section and the movable mold rotating disc, and when the sliding block is positioned in the mold closing groove section, the movable mold corresponding to the sliding block is jointed with the fixed mold; wherein, the connecting line of the orthographic projection of the material nozzle on the annular groove and the center of the annular groove passes through the joint of the die closing groove section and the die opening groove section;

the pneumatic conveying assembly comprises a fixed air disc, a movable air disc and a plurality of air needles; the movable air disc is coaxially fixed on the main shaft, and a plurality of vent holes are uniformly distributed on the same circumference of the end surface of the movable air disc; the air needle is mounted on each movable die and is connected with the air hole through an air conveying pipe; the fixed air disc is fixedly arranged on the die assembly support, the front surface of the fixed air disc is in sealing fit with the back surface of the movable air disc, the front surface of the fixed air disc is coaxially provided with an arc-shaped air cavity, the back surface of the fixed air disc is provided with an air delivery hole communicated with the air cavity, and the initial position of the air cavity is over against the initial position of the die assembly groove section so that the movable die and the fixed die can keep pressure in the die assembly stage.

Preferably, the sliding part comprises two parallel sliding rods which are arranged oppositely, the free ends of the two sliding rods are fixedly connected through a connecting plate, and the sliding blocks are fixed on the connecting plate.

Further, the fixed die structure further comprises an ejection mechanism, and each fixed die is provided with the ejection mechanism; the ejection mechanism comprises a fixed part, a movable part, a pin and a return spring, the fixed part is fixedly connected to the back of the fixed die turntable, the movable part is connected to the fixed part in a sliding manner, the pin is fixedly connected to the movable part, the fixed die turntable and the fixed die are respectively provided with a pin hole matched with the pin, and the return spring is connected between the fixed part and the movable part; and the die closing support is also provided with a material ejecting triggering component for driving the movable part to move relative to the fixed part.

Further, the ejection triggering component is a wedge-shaped block arranged on one side of the back surface of the fixed die turntable, and the distance between the wedge-shaped surface of the wedge-shaped block and the fixed die turntable is sequentially reduced along the rotating direction of the fixed die.

Preferably, the front surface of the fixed air disc is provided with a sealing groove surrounding the air cavity, and a sealing ring is arranged in the sealing groove.

Further, the device also comprises a thermoplastic feeding component; the thermoplastic feeding assembly comprises a conveying pipe, a heating screw and a screw driving device, the conveying pipe is fixedly installed on the rack, a raw material adding port and a thermoplastic extrusion port are respectively formed in two ends of the conveying pipe, the heating screw is coaxially arranged in the conveying pipe and is rotatably connected with the conveying pipe, the screw driving device is fixedly installed on the conveying pipe or the rack, and the output end of the screw driving device is mechanically connected with the heating screw; wherein the hot plastic extrusion port is connected with a feed port on the surface of the extrusion die head.

The quantitative discharging device is characterized by further comprising a material shearing assembly, wherein the material shearing assembly is positioned between the quantitative discharging assembly and the die assembly, and the material shearing assembly is pneumatic scissors fixedly installed on the rack.

Preferably, the movable die control part is slidably connected to the die closing bracket along an axis of the main shaft, and a locking mechanism is connected between the movable die control part and the die closing bracket.

Preferably, the die closing support is provided with a slide rail, the movable die control part is provided with a slide block matched with the slide rail, and the locking mechanism is a locking screw screwed on the slide block.

In a second aspect, the present invention also provides a method for generating a bottle-blowing for producing plastic containers, said method being applied to the bottle-blowing machine as described above, said method comprising the following steps:

adding raw materials into the conveying pipe through the raw material adding port, starting the screw driving device at the same time, heating and extruding the raw materials in the conveying pipe through the heating screw, and extruding thermoplastic from the thermoplastic extrusion port;

the method comprises the following steps that thermoplastic enters an extrusion die head under extrusion pressure, a bottle blank material pipe is extruded from a material nozzle, and in the discharging process of the bottle blank material pipe, the material nozzle is driven by a material nozzle driving device to move according to the requirement of the change of the thickness of a bottle wall in the length direction so as to change the size of an annular discharging gap between a quantitative control block and a switching pipe;

the material shearing assembly acts to shear the bottle blank material pipe; meanwhile, a main shaft in the mechanical die assembly component is driven by a main shaft driving device to rotate, a movable die turntable and a fixed die turntable on the main shaft synchronously rotate, and under the limitation of a movable die control component, the movable die moves towards the fixed die and clamps a bottle blank between the movable die and the fixed die while assembling the die;

under the condition that the movable die and the fixed die are kept in a die closing state, the air pressure conveying assembly blows air into the bottle blank pipe through the movable die, so that the bottle blank pipe is formed into a bottle; and after the movable mold and the fixed mold are separated, the bottle is ejected out of the fixed mold under the action of an ejection mechanism, and the bottle with the required shape is obtained.

By adopting the technical scheme, due to the arrangement of the movable die turntable and the fixed die turntable which are arranged on the main shaft and rotate along with the main shaft, the plurality of movable dies on the movable die turntable, the plurality of fixed dies on the fixed die turntable and the movable die control part for enabling the movable dies to realize die closing and die splitting relative to the fixed dies, only one material nozzle needs to be arranged, bottle blanks can be continuously provided for the plurality of pairs of movable dies and fixed dies which are matched for use through the rotation of the main shaft during use, the discharging speed of the material nozzle can be close to the discharging speed of the extrusion die head to the maximum extent, and the integral production efficiency of the bottle blowing machine is improved; in addition, can be for the setting of the material mouth of switching pipe axial activity and the material mouth drive arrangement that the drive material mouth was axial rectilinear motion in the material mouth subassembly for in-process at the ejection of compact of bottle embryo material pipe, drive the material mouth through material mouth drive arrangement and be axial motion, thereby change the size in annular ejection of compact clearance between quantitative control piece and the switching pipe, and then control ejection of compact speed, thereby satisfy the change requirement of bottle wall thickness in length direction.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a front view of a clamp assembly of the present invention;

FIG. 5 is a right side view of a clamp assembly of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is an enlarged view of a portion of FIG. 4 at C;

FIG. 8 is a front view of the fixing plate of the present invention;

fig. 9 is a schematic view of the active disc of the present invention.

In the drawing, 1-a rack, 2-an extrusion die head, 3-a material nozzle component, 31-an adapter tube, 32-a material nozzle, 4-a material nozzle driving device, 5-a die closing bracket, 6-a main shaft, 7-a main shaft driving device, 8-a movable die turntable, 9-a fixed die turntable, 10-a fixed die, 11-a movable die, 12-a sliding part, 13-a movable die control component, 14-an annular groove, 15-a fixed air disc, 16-a movable air disc, 17-a fixed part, 18-a movable part, 19-a pin, 20-a reset spring, 21-a material shearing component, 22-a conveying pipe, 23-a heating screw, 24-a screw motor, 25-a screw speed reducer and 26-a bottle taking pipeline.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on structures shown in the drawings, and are only used for convenience in describing the present invention, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.

In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, such that a connection may be fixed or removable or integral; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in light of the present general concepts, in connection with the specific context of the scheme.

Example one

A bottle blowing machine is shown in figures 1-3 and comprises a rack 1, and a quantitative discharging component and a die assembly forming component which are arranged on the rack 1, wherein the die assembly forming component is positioned right below the quantitative discharging component.

In this embodiment, the ration ejection of compact subassembly is used for making the bottle embryo with the plastics after softening to the compound die shaping subassembly makes the bottle embryo into the bottle. Wherein, the quantitative discharging component comprises an extrusion die head 2, a material nozzle component 3 and a material nozzle driving device 4. Extrusion die 2 fixed mounting is in frame 1, and this extrusion die 2's surface is provided with feed inlet and discharge gate, inside is provided with the runner of connecting this feed inlet and discharge gate, and the feed inlet setting is so that the plastics after softening get into at extrusion die 2's top surface, and the discharge gate then sets up so that the ejection of compact at extrusion die 2's bottom surface.

The nozzle assembly 3 is used for extruding the softened plastic extruded from the extrusion die head 2 in a tubular form to form a bottle blank, and the nozzle assembly 3 is controlled by the nozzle driving device 4 so as to flexibly adjust the wall thickness of the bottle blank in the length direction. The material nozzle assembly 3 specifically comprises an adapter tube 31 and a material nozzle 32, the adapter tube 31 is detachably fixed on the bottom surface of the extrusion die head 2 through a bolt or a screw, and the upper end of the adapter tube 31 is connected with a discharge hole in the bottom surface of the extrusion die head 2. The material nozzle 32 is annular, the material nozzle 32 is axially and movably sleeved on the outer wall of the adapter tube 31, meanwhile, a conical quantitative control block is fixed on the inner wall of the material nozzle 32, a gap for softened plastics to pass through is formed between the quantitative control block and the inner wall of the material nozzle 32, and the small end of the quantitative control block is right at the lower end of the adapter tube 31. The material nozzle driving device 4 is fixedly installed on the extrusion die head 2 or the frame 1, an output end of the material nozzle driving device 4 is fixedly connected with the material nozzle 32 to drive the material nozzle 3 to make linear motion in the axial direction, and the material nozzle driving device 4 is configured to be a linear driving mechanism, such as an air cylinder or an electric screw rod. So set up, when material mouth drive arrangement 4 drives material mouth 32 and is axial direction's linear motion, for example the up-motion, the conical surface of ration control block stretches into the lower extreme of switching pipe 31 more this moment, thereby make the annular gap between the conical surface of ration control block and the switching pipe 31 lower extreme diminish, thereby make the plastics unloading volume after softening reduce, the wall thickness of the bottle embryo of this department that corresponds reduces, on the contrary, when material mouth drive arrangement 4 drives material mouth 32 downstream, then can improve the plastics unloading volume after softening and reduce thereby increase the wall thickness of bottle embryo.

In the present embodiment, as shown in fig. 4 to 7, the matched mold molding assembly specifically includes a mechanical matched mold assembly and an air pressure conveying assembly. The mechanical die assembly component comprises a die assembly bracket 5 fixedly arranged on the frame 1, a main shaft 6, a main shaft driving device 7, a movable die turntable 8 and a fixed die turntable 9.

The die closing support 5 is fixedly connected to the frame 1 through bolts, the die closing support 5 comprises a horizontally arranged base, a front wallboard and a rear wallboard, the front wallboard and the rear wallboard are vertically and oppositely arranged on the base, and bearing seats are arranged on the front wallboard and the rear wallboard so that the main shaft 6 can be rotatably installed on the die closing support 5 through a bearing. The spindle drive 7 is configured as a motor or a geared motor, which is fastened to the clamping frame 5, for example to the rear wall panel, via a motor mount or can also be fixedly connected to the machine frame 1.

Movable mould carousel 8 and cover half carousel 9 all pass through the key-type connection on main shaft 6 to movable mould carousel 8 and cover half carousel 9 mutual disposition, and movable mould carousel 8 and cover half carousel 9 all are located between preceding wallboard and the back wallboard, and wherein movable mould carousel 8 arranges in the one side that is close to preceding wallboard, and in this embodiment, the front that configures movable mould carousel 8 is relative with the front of cover half carousel 9.

The fixed dies 10 are uniformly and fixedly mounted on the same circumference of the front face of the fixed die turntable 9, correspondingly, the movable dies 11 with the same number are uniformly arranged on the same circumference of the front face of the movable die turntable 8, the circumference where the fixed dies 10 are located is the same as the circumference where the movable dies 11 are located in size, and in the direction parallel to the main shaft 6, the fixed dies 10 are in one-to-one correspondence with and are opposite to the movable dies 11. In the embodiment, the movable dies 11 are slidably connected with the movable die turntable 8 along a direction parallel to the axis of the main shaft 6, for example, each movable die 8 is fixedly connected with a sliding piece 12, a guide part used in cooperation with the sliding piece 12 is arranged on the movable die turntable 8, so that the sliding piece 12 is slidably connected with the movable die turntable 8 along a direction parallel to the axis of the main shaft 6, for example, the sliding pieces 12 are configured as two parallel and oppositely arranged sliding rods, the free ends of the two sliding rods are fixedly connected through a connecting plate, and correspondingly, the guide part on the movable die turntable 8 is a guide hole matched with the sliding rod; alternatively, in another embodiment, the sliding member 12 may be configured as a rod-shaped structure with a non-circular cross section, and the guiding portion is a profiled guiding hole with the same shape, so that the sliding member 12 can only slide in the axial direction without rotating.

It can be understood that the movable mold 11 can cooperate with the fixed mold 10 during the axial movement of the slide member 12, so as to perform the mold closing and mold opening operations on the bottle blank. The mechanical clamping assembly therefore further comprises a movable die control part 13 for controlling the axial movement of the movable die 11. In the present embodiment, the movable mold control member 13 is disposed on the back side of the movable mold turret 8, is fixedly attached to the mold clamping bracket 5 (front wall plate), and is specifically provided such that the movable mold control member 13 is columnar or annular (having a circumferential outer wall), and the movable mold control member 13 is coaxial with the main shaft 6. In addition, an annular groove 14 is formed in the outer circumferential wall of the movable mold control part 13, and a sliding block (for example, a sliding block fixed to the connecting plate) adapted to the annular groove is connected to the free end of each sliding member 12, so that the sliding block moves along the circumferential direction of the annular groove 14. The annular groove 14 further includes a mold closing groove section and a mold opening groove section respectively located in two planes parallel to each other, and a distance between the mold closing groove section and the movable mold rotating disk 8 is smaller than a distance between the mold opening groove section and the movable mold rotating disk. Further, when the slide block is located in the mold clamping groove section, the movable mold 11 corresponding to the slide block is engaged with the fixed mold 10 (i.e., the mold clamping state is maintained); when the slide block is located in the open groove section, the moving mold 11 and the fixed mold 10 corresponding to the slide block are separated (i.e., kept in a mold-open state). And the connecting line between the orthographic projection of the material nozzle 32 on the annular groove 14 and the center of the annular groove 14 passes through the joint of the mold closing groove section and the mold opening groove section, namely, the position of the mold closing of the movable mold 11 and the fixed mold 10 is right opposite to the material nozzle 32, so that the bottle blank extruded from the material nozzle 32 just falls between the movable mold 11 and the fixed mold 10 which are about to be closed.

After the action of closing and opening the movable mold 11 and the fixed mold 10 is realized, pressure gas needs to be filled into the bottle embryo at the stage that the movable mold 11 and the fixed mold 10 maintain a mold closing state, so that the bottle embryo is blown into a required shape under the limitation of the movable mold 11 and the fixed mold 10.

Specifically, as shown in fig. 8 and 9, the pneumatic conveying unit includes a fixed air plate 15, a movable air plate 16, and a plurality of air pins. Each movable die 11 is provided with a gas needle, and the gas needle is used for puncturing the bottle blank after die assembly so as to conveniently inflate the bottle blank. The movable air disk 16 is in an annular structure and is coaxially installed on the main shaft 6 in a key mode, a plurality of air holes are uniformly distributed on the same circumference of the end face of the movable air disk 16, the number of the air holes is the same as that of the air needles, each air needle is connected with one air hole through one air pipe, and the air pipes are configured to comprise a section of hard pipe and a section of flexible pipe which are connected due to the fact that the movable die 11 moves. The fixed air disc 15 is fixedly installed on the die assembly support 5 (front wall plate), the fixed air disc 15 is also configured to be in an annular structure and sleeved outside the circumferential side wall of the main shaft 6, the front surface (facing the movable air disc 16) of the fixed air disc 15 is in sealing fit with the back surface (facing the fixed air disc 15) of the movable air disc 16, the front surface of the fixed air disc 15 is provided with an arc-shaped air cavity, the axis of the air cavity is superposed with the axis of the main shaft 6, and the back surface of the fixed air disc 15 is correspondingly provided with an air delivery hole communicated with the air cavity. In addition, the initial position of the air cavity is configured to be opposite to the initial position of the mold clamping groove section, so that the pressure is kept between the movable mold 11 and the fixed mold 10 in the mold clamping stage, namely, the orthographic projection of the air cavity and the orthographic projection of the mold clamping groove section are in the same fan-shaped range on one projection plane perpendicular to the main shaft 6. Wherein, the front of the fixed air disk 15 is provided with a sealing groove surrounding the air cavity, and a sealing ring is arranged in the sealing groove.

It can be understood that the bottle blowing machine provided by the embodiment further comprises an ejection mechanism for ejecting the formed bottles from the molds (e.g. the fixed molds 10), and each fixed mold 10 is provided with the ejection mechanism. In this embodiment, the ejection mechanism specifically includes a fixed portion 17, a movable portion 18, a pin 19, and a return spring 20. The fixed part 17 is fixedly connected to the back of the fixed mold turntable 9, and the movable part 18 is slidably connected to the fixed part 17, for example, the fixed part 17 is hollow cylindrical, and the movable part 18 is installed in the fixed part 17 in a socket-type manner, so that the fixed part 17 and the movable part 18 form a sleeve-type telescopic rod integrally. The pin 19 is fixedly connected to the movable part 18, the pin 19 is accommodated in the fixed part 17, and a bottle molded in the fixed mold 10 can be ejected out after the free end of the pin 19 penetrates through the fixed mold turntable 9 and a pin hole formed in the fixed mold 10. And a return spring 20 is connected between the fixed part 17 and the movable part 18, or the return spring 20 is connected between the fixed mold turnplate 9 and the pin 19 so as to be returned by the return spring 20 after the pin 19 ejects the bottle.

Accordingly, a knock-out trigger for urging the movable portion 18 to move relative to the fixed portion 17 is also attached to the clamp bracket 5. In this embodiment, the ejection triggering component is configured as a wedge-shaped block arranged on one side of the back surface of the fixed mold turntable 9, and the distances between the wedge-shaped surface of the wedge-shaped block and the fixed mold turntable 9 decrease sequentially along the rotation direction of the fixed mold 10. The arrangement is that when the fixed die 10 and the movable die 11 are separated and continue to rotate, the movable part 18 in the ejection mechanism configured on the fixed die 10 also rotates along with the fixed die until the movable part 18 touches the wedge-shaped surface of the wedge-shaped block and approaches towards one side of the fixed die turntable 9 under the limitation of the wedge-shaped surface, and then the movable pin 19 is driven to extend out and eject the bottle formed in the fixed die 10.

Furthermore, a bottle taking device for taking out the ejected bottles is further arranged between the fixed mold turntable 9 and the movable mold turntable 8, for example, the bottle taking device is a negative pressure adsorption device and comprises a bottle taking pipeline 23 and a negative pressure generator, wherein the bottle taking pipeline 23 and the negative pressure generator are both fixed on the rack 1 or the mold closing bracket 5, when in use, the negative pressure generator vacuumizes the bottle taking pipeline 23 to enable the bottle taking pipeline 23 to generate negative pressure so as to suck the bottles ejected from the fixed mold 10, and the bottles move along the bottle taking pipeline 23 and enter the next working section under the action of inertia and gravity.

It will be appreciated that a trim assembly 21 is also included, the trim assembly 21 being located between the outfeed assembly and the clamp assembly, the trim assembly preferably being configured as pneumatic scissors fixedly mounted on the frame 1. In one case, the pneumatic scissors are linked with a microswitch, and the microswitch is triggered by a fixed die turntable 9, namely, a plurality of trigger lugs are installed on the fixed die turntable 9 and are uniformly distributed in the circumferential direction, and each fixed die 10 corresponds to one trigger lug, so that when one fixed die 10 is to be matched with a corresponding movable die 11, the trigger lug corresponding to the fixed die 10 just turns to the position where the trigger lug touches the microswitch, and the pneumatic scissors linked with the microswitch work to cut off a bottle blank from a material nozzle 32, so that the bottle blank falls into the space between the fixed die 10 and the movable die 11 which are matched with the die. Or the work of the pneumatic scissors is controlled by a singlechip, the singlechip controls the pneumatic scissors to act according to a set frequency, the frequency is the same as the mold clamping frequency in the mechanical mold clamping assembly, and the action time of a pneumatic arrow corresponds to the mold clamping time of the mechanical mold clamping assembly.

Example two

The difference from the first embodiment is that: in this embodiment, the movable mold control member 13 is slidably connected to the mold clamping bracket 5 along the axis of the main shaft 6, and a locking mechanism is connected between the movable mold control member 13 and the mold clamping bracket 5.

For example, the clamping frame 5 is provided with a slide rail which is mounted on the front wall plate of the clamping frame 5 parallel to the axis of the main shaft 6, while the moving die control part 13 is provided with a slide block or a slide groove which is adapted to the slide rail, and correspondingly, a locking mechanism is provided as a locking screw which is screwed on the slide block.

Due to the arrangement, when bottles with other sizes and shapes are processed, the fixed die 10 and the movable die 11 need to be replaced correspondingly, at the moment, the movement stroke of the movable die 11 needs to be adjusted, and therefore the bottle blowing machine can be used by adjusting the position of the movable die control part 13 without adjusting the sliding part 12, and the use range of the bottle blowing machine is expanded.

EXAMPLE III

The difference from the first embodiment is that: the plastic bottle blowing machine also comprises a thermoplastic feeding component, wherein the thermoplastic feeding component is used for heating and softening plastic particles and conveying the plastic particles to the quantitative discharging component so as to facilitate the bottle blowing machine to form a required plastic bottle at one step.

In this embodiment, the thermoplastic feeding assembly specifically includes a conveying pipe 22, a heating screw, and a screw driving device. Wherein, the delivery pipe 22 is of a tubular structure and is fixedly installed on the frame 1 in a horizontal state, the delivery pipe 22 is arranged above the extrusion die head 2, and the two ends of the delivery pipe 22 in the length direction are respectively provided with a raw material adding port and a thermal plastic extrusion port. The heating screw is coaxially disposed in the conveying pipe 22, and is rotatably connected to the conveying pipe 22, and specifically, the heating screw is a rod-shaped member having a heating wire built therein and a spiral groove or a spiral blade formed on a surface thereof, and both ends of the rod-shaped member are connected to the conveying pipe 22 through bearings. The screw driving device comprises a screw motor 24 and a screw reducer 25 which are connected with each other, the screw motor 24 and the screw reducer 25 are both fixedly installed on the frame 1 or the conveying pipe 22, and the output end of the screw reducer 25 is mechanically connected with the heating screw, such as a coupler. Wherein the thermoplastic extrusion port at the distal end of the delivery pipe 22 is connected to the feed port on the surface of the extrusion die 2 through a pipe.

Example four

A bottle blowing generation method for producing plastic containers, which is applied to the bottle blowing machine as described above, and which comprises the following steps:

s1, adding a raw material into a conveying pipe through a raw material adding port, starting a screw driving device at the same time, and heating and extruding the raw material in the conveying pipe through a heating screw so as to extrude a thermoplastic from a thermoplastic extrusion port;

s2, the thermoplastic enters the extrusion die head under extrusion pressure, the bottle blank material pipe is extruded from the material nozzle, and in the process of discharging the bottle blank material pipe, the material nozzle is driven by the material nozzle driving device to move so as to change the size of an annular discharging gap between the quantitative control block and the adapter pipe according to the requirement of the change of the thickness of the bottle wall in the length direction;

s3, the material shearing assembly acts so as to shear the bottle blank material pipe, and bottle blanks are obtained; meanwhile, a main shaft in the mechanical die assembly component is driven by a main shaft driving device to rotate, a movable die turntable and a fixed die turntable on the main shaft synchronously rotate, and under the limitation of a movable die control component, the movable die moves towards the fixed die and clamps a bottle blank between the movable die and the fixed die while assembling the die;

s4, blowing air into the bottle blank pipe by the air pressure conveying assembly through the movable die under the condition that the movable die and the fixed die are kept in a matched die state, so that the bottle blank pipe is formed into a bottle; and after the movable mold and the fixed mold are separated, the bottle is ejected out of the fixed mold under the action of an ejection mechanism, and the bottle with the required shape is obtained.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims

1. A bottle blowing machine is characterized in that: the quantitative discharging device comprises a rack, a quantitative discharging component and a die assembly forming component, wherein the quantitative discharging component and the die assembly forming component are mounted on the rack;

the quantitative discharging assembly comprises an extrusion die head, a material nozzle assembly and a material nozzle driving device; the extrusion die head is fixedly arranged on the rack, a feed inlet and a discharge outlet are arranged on the surface of the extrusion die head, and a flow passage for connecting the feed inlet and the discharge outlet is arranged in the extrusion die head; the material nozzle assembly comprises a switching pipe and a material nozzle, the switching pipe is fixed on the extrusion die head, the upper end of the switching pipe is connected with the discharge port, the material nozzle is annularly and axially and movably sleeved on the outer wall of the switching pipe, a conical quantitative control block is fixed on the inner wall of the material nozzle, and the small end of the quantitative control block is right opposite to the lower end of the switching pipe; the material nozzle driving device is fixedly arranged on the extrusion die head or the rack, and the output end of the material nozzle driving device is fixedly connected with the material nozzle so as to drive the material nozzle to do axial linear motion;

the mechanical die assembly component comprises a die assembly support fixedly arranged on the rack, a main shaft rotatably connected to the die assembly support, a main shaft driving device fixedly arranged on the die assembly support and mechanically connected with the main shaft, and a movable die turntable and a fixed die turntable which are coaxially fixed on the main shaft; the front surface of the movable mold turntable is opposite to the front surface of the fixed mold turntable, a plurality of fixed molds are uniformly and fixedly installed on the same circumference of the front surface of the fixed mold turntable, the same number of movable molds are uniformly arranged on the same circumference of the front surface of the movable mold turntable, the movable molds are connected with sliding pieces, and the sliding pieces are connected to the movable mold turntable in a sliding manner along the direction parallel to the axis of the main shaft;

the mechanical die assembly component also comprises a movable die control component positioned on one side of the back surface of the movable die turntable, the movable die control component is columnar or annular, the movable die control component is fixedly arranged on the die assembly bracket, and the movable die control component and the main shaft share the same axis; an annular groove is formed in the circumferential outer wall of the movable mold control component, and a sliding block matched with the annular groove is connected to the free end of each sliding piece; the annular groove comprises a die assembly groove section and a die assembly groove section which are respectively positioned in two parallel planes, the distance between the die assembly groove section and the movable die turntable is smaller than the distance between the die assembly groove section and the movable die turntable, and when the sliding block is positioned in the die assembly groove section, the movable die corresponding to the sliding block is jointed with the fixed die; wherein, the connecting line of the orthographic projection of the material nozzle on the annular groove and the center of the annular groove passes through the joint of the die closing groove section and the die opening groove section;

2. The bottle blowing machine of claim 1, wherein: the slider includes two parallel and opposite arrangement's slide bar, two the free end of slide bar passes through connecting plate fixed connection, the slide block is fixed on the connecting plate.

3. The bottle blowing machine of claim 1, wherein: the fixed die structure also comprises ejection mechanisms, and each fixed die is provided with the ejection mechanism; the ejection mechanism comprises a fixed part, a movable part, a pin and a return spring, the fixed part is fixedly connected to the back of the fixed die turntable, the movable part is connected to the fixed part in a sliding manner, the pin is fixedly connected to the movable part, the fixed die turntable and the fixed die are respectively provided with a pin hole matched with the pin, and the return spring is connected between the fixed part and the movable part; and the die closing support is also provided with a material ejecting triggering component for driving the movable part to move relative to the fixed part.

4. A bottle blowing machine according to claim 3, characterized in that: the ejection triggering component is a wedge-shaped block arranged on one side of the back surface of the fixed die turntable, and the distance between the wedge-shaped surface of the wedge-shaped block and the fixed die turntable is sequentially reduced along the rotating direction of the fixed die.

5. The bottle blowing machine of claim 1, wherein: the front surface of the fixed air disc is provided with a sealing groove surrounding the air cavity, and a sealing ring is arranged in the sealing groove.

6. The bottle blowing machine of claim 1, wherein: the device also comprises a thermoplastic feeding component; the thermoplastic feeding assembly comprises a conveying pipe, a heating screw and a screw driving device, the conveying pipe is fixedly installed on the rack, a raw material adding port and a thermoplastic extrusion port are respectively formed in two ends of the conveying pipe, the heating screw is coaxially arranged in the conveying pipe and is rotatably connected with the conveying pipe, the screw driving device is fixedly installed on the conveying pipe or the rack, and the output end of the screw driving device is mechanically connected with the heating screw; wherein the hot plastic extrusion port is connected with a feed port on the surface of the extrusion die head.

7. The bottle blowing machine of claim 1, wherein: the quantitative discharging assembly is arranged between the quantitative discharging assembly and the die assembly, and the material shearing assembly is a pneumatic scissors fixedly mounted on the rack.

8. The bottle blowing machine of claim 1, wherein: the movable die control part is connected to the die assembly support in a sliding mode along the axis of the main shaft, and a locking mechanism is connected between the movable die control part and the die assembly support.

9. The bottle blowing machine of claim 8, wherein: the die closing support is provided with a slide rail, the movable die control part is provided with a slide block matched with the slide rail, and the locking mechanism is a locking screw screwed on the slide block.

10. A bottle blowing generation method for producing plastic containers, applied to a bottle blowing machine according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

adding raw materials into the conveying pipe through the raw material adding port, simultaneously starting the screw driving device, heating and extruding the raw materials in the conveying pipe through the heating screw, and further extruding the thermoplastic from the thermoplastic extrusion port;

the method comprises the following steps that thermoplastic enters an extrusion die head under extrusion pressure, a bottle blank material pipe is extruded from a material nozzle, and in the discharging process of the bottle blank material pipe, the material nozzle is driven by a material nozzle driving device to move so as to change the size of an annular discharging gap between a quantitative control block and an adapter pipe according to the change requirement of the thickness of a bottle wall in the length direction;

the material shearing assembly acts to shear the bottle blank material pipe; meanwhile, a main shaft in the mechanical die assembly component is driven by a main shaft driving device to rotate, a movable die turntable and a fixed die turntable on the main shaft synchronously rotate, and under the limitation of a movable die control part, a movable die moves towards the fixed die and clamps a bottle blank between the movable die and the fixed die while assembling the die;

under the condition that the movable die and the fixed die are kept in die assembly, the air pressure conveying assembly blows air into the bottle blank pipe through the movable die, so that the bottle blank pipe is formed into a bottle; and after the movable mold and the fixed mold are separated, the bottle is ejected out of the fixed mold under the action of an ejection mechanism, and the bottle with the required shape is obtained.