CN212446237U

CN212446237U - Die head structure with adjustable radial wall thickness of molten blank

Info

Publication number: CN212446237U
Application number: CN202021257296.2U
Authority: CN
Inventors: 林一波; 徐文良; 肖志林; 孙晓东
Original assignee: Suzhou Tongda Machinery Co Ltd
Current assignee: Suzhou Tongda Machinery Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-02
Anticipated expiration: 2030-06-30

Abstract

A die head structure with adjustable radial wall thickness of a molten blank comprises a lower pressure plate, a die head and a die head, wherein the lower pressure plate is provided with a die accommodating cavity; an upper platen, stacked on the lower platen, having an upper platen feed chamber; the upper portion of outer bush is visited the bush and is held the intracavity and support and stretch to the below of holding down the dish on the upper portion of pressure disk, lower part of pressure disk down, and interior bush is located outer bush, and upper portion cooperates, the lower part of lower part extension to the below of holding down the dish with the core shaft cover, constitutes between the outer wall of core shaft cover and the upper portion inner wall of outer bush and is the fuse-melt delivery chamber, and the space between the outer wall of interior bush and the lower part inner wall of outer bush constitutes for the fuse-block runner, characteristics: the anti-deformation core sleeve is characterized by further comprising an inner opening die anti-deformation supporting mechanism and a plurality of fused blank radial wall thickness adjusting mechanisms, the inner opening die anti-deformation supporting mechanism is fixed to the bottom of the core sleeve, the fused blank radial wall thickness adjusting mechanisms are fixed to the outer wall of the lower pressure plate, and the inner opening die cover is sleeved outside the inner opening die anti-deformation supporting mechanism. The support device is beneficial to providing good support conditions for the inner opening die; and the requirement of radial variation adjustment of the thickness of the molten blank wall is met.

Description

Die head structure with adjustable radial wall thickness of molten blank

Technical Field

The utility model belongs to the technical field of plastic products forming machinery, concretely relates to radial wall thickness adjustable die head structure of fused base.

Background

The foregoing die structure is an important component of the structural system of a blow molding machine for blowing hollow plastic articles such as various types of bottles, jars, palletising drums, water tanks, trays for stacking goods, various types of pipe fittings such as air ducts for vehicles, and the like. As known in the art, if a molten blank (i.e., a plastic molten blank or a molten plastic blank, hereinafter referred to as "molten plastic blank") with a varying radial wall thickness at some position is to be obtained, a gap between an inner opening die and an outer opening die of a structural system of a die head mechanism needs to be adjusted, and specifically, a width of a molten blank runner for passing the molten blank between the inner opening die and the outer opening die needs to be adjusted according to process requirements, so that the radial wall thickness of the molten blank from a runner discharge port (i.e., a molten blank outlet) between the inner opening die and the outer opening die meets the expected hollow plastic product requirements.

Conventional die structures and their utility can be found in, but are not limited to, the following patent documents: CN2837051Y (ring die device of blow molding machine), CN102114702B (die structure of blow molding machine), CN102152472B (die mechanism of plastic blow molding machine with improved structure), CN102145540B (die mechanism of plastic blow molding machine), CN202825606U (die mechanism of blow molding machine), CN203305506U (die of hollow blow molding machine), CN203472117U (a multi-purpose die for blow molding equipment), and CN205185287U (die structure of hollow plastic blow molding machine), etc.

Technical information related to the thickness of the molten blank wall can be found in published patent documents, such as "electric adjusting device for head and die gap of extrusion blow molding machine", and implementing method and application thereof "recommended by CN101960750B," electric adjusting device for head and die gap of blow molding machine "provided by CN106827463A," electric adjusting device for head and die gap of extrusion blow molding machine "introduced in US5851578, and so on. Typically, the parison radial wall thickness control device of the blow molding machine die head mechanism is disclosed in CN 108724673A. However, since CN108724673A is directed to a car air duct having a relatively special shape and an S-shape, the melt is led out from between the outer wall of the core and the inner wall of the inner opening mold (called "opening mold" in the patent), the upper outer wall of the opening mold is screwed with the opening mold fixing seat, and the opening mold fixing seat is fixed with the opening mold fixing seat sleeve, so that the inner opening mold, i.e. the opening mold, is free from abnormal elastic deformation. However, for a die head mechanism with a melt channel located between the taper sleeve-shaped outer wall of the inner opening die and the inner wall of the outer opening die, in the actual use process, the inner opening die is often elastically deformed, and the elastic deformation of the inner opening die can cause abnormal and irregular changes of the melt channel gap, which can cause product scrap in severe cases; because the adjustment form of the radial wall thickness control device of the patent is realized by indirect adjustment, the so-called indirect adjustment is realized by changing the positions of the die fixing seat and the die by changing the position of the die fixing seat sleeve, so that the change of the gap between the inner wall of the die and the outer wall of the die core is realized, and the adjustment of the outer die does not have inspiration function, because the adjustment of the gap between the inner die and the outer die can only be realized by adjusting the outer die; the patent discloses a radial wall thickness control device on a square-shaped fixing sleeve, but there is no reference to how the radial wall thickness control device is arranged on a cylindrical pressure plate. In view of the foregoing, and not by way of limitation, there is a need for reasonable improvements in the art that will be described below.

Disclosure of Invention

The utility model aims to provide a help providing good support condition and can avoid unusual elastic deformation for interior bush, be favorable to directly adjusting and can change the fuse-element runner clearance that is located between interior bush and the outer bush as required to the outer bush, be of value to convenient and reliably set up the radial wall thickness adjustment mechanism of fused mass on the pressure disk down and realize being connected with the good of outer bush and can ensure the regulating effect to the radial width change of the fuse-element runner between interior bush and the outer bush, there is the die head structure of fused mass radial wall thickness adjustable that makes outer bush unanimous and can ensure the regulating effect of ideal at all regulation positions atress.

The utility model aims to provide a die head structure with adjustable radial wall thickness of a molten blank, which comprises a lower pressure plate, wherein the lower pressure plate is provided with a die accommodating cavity which is communicated from the upper part to the lower part of the lower pressure plate; an upper platen which is superposed on the lower platen at a position corresponding to the upper side of the lower platen and fixed to the lower platen, the upper platen having an upper platen feed chamber which passes through from the upper portion to the lower portion of the upper platen, the upper platen feed chamber corresponding to and communicating with the die receiving chamber; an inner mouth mold, an outer mouth mold and a core shaft sleeve, wherein the upper part of the outer mouth mold extends into the mouth mold accommodating cavity and is supported on the upper part of the lower pressing plate, the lower part of the outer mouth mold extends to the lower part of the lower pressing plate, the inner mouth mold is positioned in the outer mouth mold, the upper part of the inner mouth mold is matched with the lower part of the core shaft sleeve, the lower part of the inner mouth mold also extends to the lower part of the lower pressing plate and is flush with the lower part of the outer mouth mold, the space between the outer wall of the core shaft sleeve and the inner wall of the upper part of the outer mouth mold is a melt guiding cavity, the space between the outer wall of the inner mouth mold and the inner wall of the lower part of the outer mouth mold forms a melt blank flow channel, and the gap between the lower edge of the inner mouth mold and the lower edge of the outer mouth mold is a melt blank leading-out opening, the inner mouth mold deformation preventing support mechanism and a plurality of melt blank radial wall thickness adjusting mechanisms which are spaced at the, the molten blank radial wall thickness adjusting mechanism is fixed with the outer wall of the lower pressure plate in a horizontal cantilever state, extends into the neck ring mold accommodating cavity at a position corresponding to a connecting shaft abdicating hole which is formed in the lower pressure plate and communicated with the neck ring mold accommodating cavity and is connected with the lower part of the outer neck ring mold, and the inner neck ring mold is sleeved outside the inner neck ring mold deformation-preventing supporting mechanism.

In a specific embodiment of the present invention, a fixing bracket fitting groove recessed in the same amount as the billet radial wall thickness adjusting mechanism is formed in the outer wall of the lower platen and in a position corresponding to the connecting shaft offset hole, an outer opening die extension flange edge supporting groove is formed around the upper surface of the lower platen and in a position corresponding to the upper portion of the outer opening die, an outer opening die extension flange edge is formed on the outer wall of the upper portion of the outer opening die and around the periphery of the outer opening die, the outer opening die extension flange edge is supported on the outer opening die extension flange edge supporting groove, and an upward facing side surface of the outer opening die extension flange edge is defined by the bottom surface of the upper platen; an inner mouth mold step ring is formed on the upper part of the inner mouth mold and around the inner mouth mold, a core shaft sleeve step cavity is formed on the lower part of the core shaft sleeve and around the core shaft sleeve, the inner mouth mold step ring is matched with the core shaft sleeve step cavity, and the downward side of the inner mouth mold step ring is covered on the inner mouth mold anti-deformation supporting mechanism.

In another specific embodiment of the present invention, the inner opening mold deformation-preventing supporting mechanism includes an end cover and a set of inner opening mold adjusting and supporting screws, the end cover is formed with an end cover cavity, a cover lifting actuating rod hole is formed at the central position of the top wall of the end cover cavity, and a stack ring is formed at the peripheral edge part of one upward side of the top wall of the end cover cavity, the set of inner opening mold adjusting and supporting screws are arranged on the end cover around the periphery of the lower part of the end cover at intervals, the set of inner opening mold adjusting and supporting screws extend out of the outer wall of the end cover to contact with the inner wall of the inner opening mold, the inner opening mold step ring of the inner opening mold is covered on the stack ring, and the peripheral inner wall of the inner opening mold is in contact with the peripheral outer; the lower part of the core shaft sleeve is fixed with one upward side of the top wall of the end cover cavity in the stack ring through a core shaft sleeve fixing screw, and the core shaft sleeve cavity of the core shaft sleeve corresponds to and is communicated with the end cover lifting actuating rod hole.

In another specific embodiment of the present invention, a core sleeve stopper is fixed to the center of the upward side of the top wall of the end cap cavity by a core sleeve stopper fixing screw, and the outer wall of the core sleeve stopper is engaged with the inner wall of the lower portion of the core sleeve cavity of the core sleeve; the end cover is bell-shaped.

In another specific embodiment of the present invention, upper platen fixing screw holes are provided on the lower platen and around the lower platen at intervals, upper platen fixing screws are provided in the upper platen fixing screw holes, upper platen screw holes are provided on the upper platen and at positions corresponding to the upper platen fixing screws, and the upper platen fixing screws are screwed into the upper platen screw holes; and a lower platen heater is arranged on the outer wall of the lower platen, and an upper platen heater is arranged on the outer wall of the upper platen.

The utility model discloses a still have a concrete embodiment on the outer wall of the lower part of outer bush and corresponding to the connecting axle hole of stepping down the position of hole constitutes there is outer bush connecting seat, corresponding to the connecting axle hole of stepping down and the position of fixed bolster cooperation groove with horizontal cantilever state with the outer wall of pressure disk is fixed down fuse blank radial wall thickness adjustment mechanism with outer bush connecting seat is connected to this fuse blank radial wall thickness adjustment mechanism's quantity is for centering on two, three or four of the equidistant setting all around of pressure disk down.

In a more specific embodiment of the present invention, the inner and outer dies are made of spring steel, which is 50CrVA spring steel.

The utility model discloses a further a concrete embodiment, the radial wall thickness adjustment mechanism of billet include hydro-cylinder body, first end cover I, second end cover II, hysteresis lag displacement sensor, supporting shaft board, forked piece connecting block, a pair of fixed bolster and connecting axle, the connecting axle corresponding to the position horizontal migration ground that the connecting axle abdomens the hole sets up on the pressure disk down and this connecting axle orientation the one end and the outer die connecting seat of outer mouthful of die connecting seat are connected, and the connecting axle keeps away from the one end and the forked piece connecting block orientation of outer mouthful of die connecting seat the one end of pressure disk is connected down, a pair of fixed bolster correspond each other and this one end to the pressure disk down of fixed bolster orientation is corresponding to respectively the position of fixed bolster cooperation groove respectively through fixed bolster screw fixed with the pressure disk down, and the one end constitution that a pair of fixed bolster kept away from down the pressure disk is horizontal cantilever end and respectively has through fixed bolster connecting plate screw between upper portion and lower part for horizontal cantilever end A fixed bracket connecting plate, wherein a tip screw adjusting abdicating hole is respectively arranged at the middle part of a pair of fixed brackets and at the corresponding position, the space between the pair of fixed brackets is formed into a fork-shaped part accommodating cavity, the fork-shaped part is arranged in the fork-shaped part accommodating cavity, a tip screw seat is respectively arranged on the outer wall of a pair of fork-shaped part arms of the fork-shaped part and at the corresponding position, a tip screw is arranged on the tip screw seat, the tip screw extends into the tip screw adjusting abdicating hole towards one end of the pair of fixed brackets, the tip screw extends into the fork-shaped part cavity towards one end of the fork-shaped part, the fork-shaped part connecting block extends into the fork-shaped part cavity towards one end of the fork-shaped part, one end of the tip screw towards the fork-shaped part is locked at the two sides of the fork-shaped part connecting block in the fork-shaped part cavity, and the supporting shaft plate is fixed between one ends of the pair of the fixed brackets towards, the first end cover I is fixed with the oil cylinder body through a first end cover screw I at a position between the support shaft plate and the oil cylinder body, an oil cylinder piston is arranged in the oil cylinder body, a first oil cavity I of the oil cylinder body and a second oil cavity II of the oil cylinder body are separated in the oil cylinder body by the oil cylinder piston, the first oil cavity I of the oil cylinder body is communicated with a first oil inlet and return hole I arranged on the oil cylinder body, the second oil cavity II of the oil cylinder body is communicated with a second oil inlet and return hole II arranged on the oil cylinder body, a piston rod extends from the central position of one side of the oil cylinder piston facing the first end cover I, the piston rod sequentially penetrates through the first end cover I and the support shaft plate and then is connected with the fork-shaped piece, the second end cover II is fixed with one side of the oil cylinder body opposite to the first end cover I through a second end cover fixing screw II, the position of the second end cover II corresponds to the position of the first end cover I, the hysteresis displacement sensor is fixed with the central position of the, the sensing head of the hysteresis displacement sensor sequentially passes through the sensing head abdicating hole at the central position of the second end cover II and the second oil cavity II of the oil cylinder body and then is connected with the oil cylinder piston.

In a still more specific embodiment of the present invention, a wrench-operated hexagonal milling surface is formed on the body of the connecting shaft, and the connecting shaft is oriented toward one end of the outside die connecting seat to form a connecting shaft head, a connecting shaft head external thread is formed on the outer wall of the connecting shaft head, and the connecting shaft head external thread is connected to the outside die connecting seat internal thread formed on the outside die connecting seat.

In yet another specific embodiment of the present invention, a fork-shaped member piston rod connecting hole is formed on the fork-shaped member and at a position corresponding to the piston rod, a tension groove is further formed at an end of the fork-shaped member facing the piston rod, the piston rod is inserted into the fork-shaped member piston rod connecting hole and is defined by a pair of clamping screws disposed on the fork-shaped member and corresponding to both sides of the piston rod, respectively, and the positions of the pair of clamping screws on the fork-shaped member are located at the position of the tension groove; and a piston rod sealing ring is arranged in the center of the first end cover I, and the piston rod is in sealing fit with the piston rod sealing ring.

One of the technical effects of the technical scheme provided by the utility model is that the inner mouth die anti-deformation supporting mechanism is additionally arranged, and the inner mouth die cover is sleeved outside the inner mouth die anti-deformation supporting mechanism, so that good supporting conditions are provided for the inner mouth die, and abnormal elastic deformation is avoided; secondly, the outer opening die is adjusted by a molten blank radial wall thickness adjusting mechanism which is arranged outside the lower pressing plate and connected with the outer opening die, so that the width of a molten blank flow passage between the inner opening die and the outer opening die can be changed according to requirements, and the requirement on radial change adjustment of the wall thickness of the molten blank is met; thirdly, the radial thickness adjusting mechanism of the molten blank can be conveniently arranged on the lower pressure plate and connected with the outer opening die at the position of the abdicating hole of the connecting shaft, so that the radial adjusting effect of the thickness of the molten blank passing through the inner opening die and the outer opening die can be fully ensured; fourthly, because the structure of the adjusting mechanism for the radial wall thickness of the molten blank is reasonable, and the plurality of adjusting mechanisms for the radial wall thickness of the molten blank have good controllability, the stress of the outer mouth mold at the adjusting part can be ensured to be consistent, and the quality of the radial wall thickness of the molten blank is stable and reliable.

Drawings

Fig. 1 is a structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic front side view of fig. 1.

Fig. 3 is a detailed configuration diagram of the mechanism for adjusting the radial thickness of the billet illustrated in fig. 1 and 2.

Fig. 4 is an assembled external view of fig. 1.

Detailed Description

In order to make the technical essence and advantages of the present invention more clear, the applicant below describes in detail the embodiments, but the description of the embodiments is not a limitation of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not essential, should be considered as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are directed to the position state of fig. 1, and thus, should not be interpreted as a limitation to the technical solution provided by the present invention.

Referring to fig. 1 and 2, there is shown a lower platen 1, the lower platen 1 having a die receiving cavity 11 passing through from the upper portion to the lower portion of the lower platen; an upper platen 2 is shown, the upper platen 2 is superposed on the lower platen 1 at a position corresponding to the upper part of the lower platen 1 and fixed with the lower platen 1, the upper platen 2 is provided with an upper platen feeding cavity 21 which penetrates from the upper part to the lower part of the upper platen 2, the upper platen feeding cavity 21 corresponds to and communicates with the die accommodating cavity 11, and the diameter of the upper platen feeding cavity 21 is large at the upper part and small at the lower part, so that the upper platen feeding cavity is in a shape of a round frustum, namely a trumpet-shaped cavity; an inner die 3, an outer die 4 and a core sleeve 5 are shown, the upper part of the outer die 4 protrudes into the die receiving chamber 11 and is supported on the upper part of the lower platen 1, while the lower part of the outer die 4 extends below the lower platen 1, the inner die 3 is located in the outer die 4, the upper part of the inner die 3 is fitted to the lower part of the core sleeve 5, while the lower part of the inner die 3 likewise extends below the lower platen 1 and is flush with the lower part, i.e., the lower edge, of the outer die 4, the space between the outer wall of the core sleeve 5 and the upper inner wall of the outer die 4 is formed as a melt feed chamber 9a, the space between the outer wall of the inner die 3 and the lower inner wall of the outer die 4 is formed as a melt flow channel 9b, and the space between the lower edge of the inner die 3 and the lower edge of the outer die 4 is formed as a melt exit 9 c.

As the technical scheme provided by the utility model: the structure system of the die head with the adjustable radial wall thickness of the molten blank also comprises an inner opening die anti-deformation supporting mechanism 6 and a plurality of molten blank radial wall thickness adjusting mechanisms 7 with the same interval distance, wherein the inner opening die anti-deformation supporting mechanism 6 is fixed with the bottom of the core shaft sleeve 5, the molten blank radial wall thickness adjusting mechanisms 7 are fixed with the outer wall of the lower pressure plate 1 in a horizontal cantilever state and extend into the opening die containing cavity 11 to be connected with the lower part of the outer opening die 4 at the position corresponding to a connecting shaft abdicating hole 12 which is formed on the lower pressure plate 1 and communicated with the opening die containing cavity 11, and the cover of the inner opening die 3 is sleeved outside the inner opening die anti-deformation supporting mechanism 6.

In the present embodiment, the applicant exemplifies the case where the number of the billet radial wall thickness adjusting mechanisms 7 is two, the two billet radial wall thickness adjusting mechanisms 7 are in a face-to-face positional relationship at 180 ° intervals around the periphery of the aforementioned lower platen 1, and if three or four billet radial wall thickness adjusting mechanisms 7 are employed, they are distributed at 120 ° or 90 ° intervals in the circumferential direction of the lower platen 1, respectively. As is clear from the foregoing description, the present invention cannot be limited by the change in the number of the mechanisms 7 for adjusting the radial thickness of the billet.

Continuing with fig. 1 and 2, fixing holder engagement grooves 13 recessed in the outer wall surface of the lower platen 1 in the same number as, i.e., equal to, the number of the above-described billet radial wall thickness adjusting mechanisms 7 are formed in pairs, i.e., in two, on the outer wall of the above-described lower platen 1 at positions corresponding to the above-described connecting shaft relief holes 12, specifically, two fixing holder engagement grooves 13 are formed corresponding to one billet radial wall thickness adjusting mechanism 7, an outer-mouth die expanding flange edge supporting groove 14 is formed around the upper surface of the lower platen 1 and at a position corresponding to the upper portion of the outer-mouth die 4, an outer die expanding flange 41 is formed on the upper outer wall of the outer die 4 and around the outer die 4, the outer die expanding flange 41 is supported in the outer die expanding flange support groove 14, and is defined by a side surface of the aforementioned bottom surface (bottom surface) of the upper platen 2, which side surface faces upward, of the outer die expanding flange 41; an inner die step ring 31 is formed on the upper portion of the inner die 3 and around the inner die 3, a core sleeve step cavity 51 is formed on the lower portion of the core sleeve 5 and around the core sleeve 5, the inner die step ring 31 is matched with the core sleeve step cavity 51, and the downward side of the inner die step ring 31 is covered on the inner die deformation preventing support mechanism 6.

Still referring to fig. 1 and 2, the aforementioned inner mouth mold deformation-preventing supporting mechanism 6 includes an end cap 61 and a set of inner mouth mold adjusting and supporting screws 62, the end cap 61 is formed with an end cap cavity 611, an end cap lifting actuating rod hole 61111 is formed at the central position of the top wall 6111 of the end cap cavity 611, and a stack ring 61112 is formed at the peripheral edge position of the upward side of the top wall 6111 of the end cap cavity, the set of inner mouth mold adjusting and supporting screws 62 are arranged on the end cap 61 at intervals around the periphery of the lower part of the end cap 61, the set of inner mouth mold adjusting and supporting screws 62 extend out of the outer wall of the end cap 61 to contact with the inner wall of the aforementioned inner mouth mold 3, one end of each of the aforementioned inner mouth mold adjusting and supporting screws 62 facing the end cap cavity 611 is provided with or fixed with a fixing nut 621, and after the inner mouth mold adjusting and supporting screws 62 have completed adjustment, the aforementioned inner mouth mold step ring 31 of the inner mouth mold 3 is covered on the stack ring 61112, the peripheral inner wall of the inner mouth mold 3 is contacted with the peripheral outer wall of the end cover 61; the lower part of the core shaft sleeve 5 is fixed with the upward side of the top wall 6111 of the end cover cavity through the core shaft sleeve fixing screw 52 in the stack ring 61112 and the position corresponding to the core shaft sleeve fixing screw hole 521 arranged at the bottom of the core shaft sleeve fixing screw, and the core shaft sleeve cavity 53 of the core shaft sleeve 5 corresponds to and is communicated with the end cover lifting actuating rod hole 61111.

In the blow molding process, specifically, there is a blow-up ratio relationship between the preform, i.e., the melt, and the article when the article is molded, and in the case of a round barrel product, theoretically, the blow-up ratios of the round barrel and the round preform at the same cross section are uniform, and the gap of the melt flow path 9b between the inner die 3 and the outer die 4 is uniform. However, when the blow-up ratio is not uniform, for example, the container is a square barrel, the gap between the inner die 3 and the outer die 4 in the molten billet flow passage 9b on the same cross section needs to be adjusted, in this case, the adjustment is realized by the inner die adjusting support screw 62 to ensure the gap relation on the same cross section, and when the adjustment of the corresponding inner die adjusting support screw 62 is completed, the fixed nut 621 locks the adjusted inner die adjusting support screw.

A core shaft sleeve limiting block 63 is fixed at the central position of the upward side of the top wall 6111 of the end cover cavity through a core shaft sleeve limiting block fixing screw 631, and the outer wall of the core shaft sleeve limiting block 63 is matched with the inner wall of the lower part of the core shaft sleeve cavity 53 of the core shaft sleeve 5; the end cap 61 is bell-shaped. Also shown in fig. 1 and 2 is a core sleeve stop block hole 632 in the center of the core sleeve stop 63, the core sleeve stop block hole 632 corresponding to and having the same diameter as the endcap lift actuator rod hole 61111 previously described.

Upper platen fixing screw holes 15 are formed in the lower platen 1 at intervals around the lower platen 1, upper platen fixing screws 151 are arranged in the upper platen fixing screw holes 15, upper platen screw holes 22 are formed in the upper platen 2 at positions corresponding to the upper platen fixing screws 151, and the upper platen fixing screws 151 are screwed into the upper platen screw holes 22; a lower platen heater 16 is provided on the outer wall of the lower platen 1, and an upper platen heater 23 is provided on the outer wall of the upper platen 2.

Still referring to fig. 1 and 2, an outer port die connecting holder 42 is formed on the outer wall of the lower portion of the outer port die 4 at a position corresponding to the connecting shaft relief hole 12, the billet radial wall thickness adjusting mechanism 7 fixed to the outer wall of the lower platen 1 in a horizontally cantilevered state at a position corresponding to the connecting shaft relief hole 12 and the fixing bracket fitting groove 13 is connected to the outer port die connecting holder 42, and the number of the billet radial wall thickness adjusting mechanisms 7 is two that are provided at equal intervals around the periphery of the lower platen 1, that is, at intervals of 180 ° and that are in a face-to-face positional relationship.

In the present embodiment, the inner die 3 and the outer die 4 are made of spring steel, which is under the designation of 50CrVA spring steel.

According to the conventional knowledge, the end cap 61 is lifted up and restored down by the end cap lifting actuating rod, not shown in the figure, which is connected to the top wall 6111 of the end cap cavity from top to bottom through the mandrel cavity 53, the mandrel sleeve stopper hole 632 and the end cap lifting actuating rod hole 61111. Since the inner die 3 is fitted over the end cover 61, the aforementioned billet drawing port 9c is closed when the end cover 61 is lifted up by the end cover actuating lever, and vice versa. Before the fused blank outlet 9c is closed, the fused blank is cut by a blank cutting mechanism and then is introduced into a mold of a structural system of the blow molding machine, and the fused blank is blown and molded by a blowing needle of a blow molding mechanism.

Referring to fig. 3 and 4 in combination with fig. 1 to 2, the aforementioned adjusting mechanism 7 for adjusting the radial wall thickness of the billet comprises an oil cylinder body 71, a first end cover i 72, a second end cover ii 73, a hysteresis displacement sensor 74, a supporting shaft plate 75, a fork 76, a fork connecting block 77, a pair of fixing brackets 78 and a connecting shaft 79, the connecting shaft 79 is horizontally movably disposed on the aforementioned lower platen 1 at a position corresponding to the aforementioned connecting shaft relief hole 12 and the connecting shaft 79 is connected to the outer die connecting block 42 toward one end of the aforementioned outer die connecting block 42, while one end of the connecting shaft 79 remote from the outer die connecting block 42 is connected to one end of the fork connecting block 77 toward the aforementioned lower platen 1, the pair of fixing brackets 78 correspond to each other and one end of the pair of fixing brackets 78 toward the lower platen 1 is fixed to the lower platen 1 by fixing bracket screws 781 at positions corresponding to the aforementioned fixing bracket mating grooves 13 (a pair) respectively, and one ends of the pair of fixing brackets 78 remote from the lower platen 1 are formed as horizontal cantilever ends and a fixing bracket connecting plate 782 is fixed between the upper and lower portions by fixing bracket connecting plate screws 7821, a tip screw adjustment abdicating hole 783 is formed in the middle of the pair of fixing brackets 78 and at a position corresponding to each other, a space between the pair of fixing brackets 78 is formed as a fork-receiving chamber 784, the fork 76 is disposed in the fork-receiving chamber 784, tip screw seats 7611 are formed on the outer walls of the pair of fork arms 761 of the fork 76 and at a position corresponding to each other, a tip screw 76111 is fitted on the tip screw seat 7611, the tip screw 76111 is inserted into the tip screw adjustment abdicating hole 783 toward one end of the pair of fixing brackets 78, and the tip screw 11 is inserted into the fork chamber 762 of the fork 76 toward one end of the fork 76, the fork connecting block 77 extends into a fork cavity 762 toward one end of the fork 76, the tip screw 76111 locks both sides of the fork connecting block 77 toward one end of the fork 76 in the fork cavity 762, the support shaft plate 75 is fixed between one end of a pair of fixing brackets 78 toward a first end cap i 72 by a support shaft plate fixing screw 751, the first end cap i 72 is fixed to the cylinder block 71 by a first end cap screw i 721 at a position between the support shaft plate 75 and the cylinder block 71, a cylinder piston 711 is provided in the cylinder block 71, a first oil chamber i 7111 of the cylinder block and a second oil chamber ii 7112 of the cylinder block are partitioned in the cylinder block 71 by the cylinder piston 711, the first oil chamber i 7111 of the cylinder block communicates with a first oil inlet/outlet hole i 712 provided in the cylinder block 71, and the second oil chamber ii 7112 of the cylinder block communicates with a second oil inlet/outlet hole ii 713 provided in the cylinder block 71, a piston rod 7113 extends from the center of the side of the cylinder piston 711 facing the first end cap i 72, the piston rod 7113 is connected with the fork 76 after passing through the first end cap i 72 and the support shaft plate 75 in sequence, the second end cap ii 73 is fixed with the side of the cylinder body 71 opposite to the first end cap i 72 by a second end cap fixing screw ii 731, the position of the second end cap ii 73 corresponds to the position of the first end cap i 72, the hysteresis displacement sensor 74 is fixed with the center of the second end cap ii 73 in a horizontal state, and the sensing head 741 of the hysteresis displacement sensor 74 is connected with the cylinder piston 711 after passing through the sensing head abdicating hole 732 at the center of the second end cap ii 73 and the second oil chamber ii 7112 of the cylinder body in sequence.

As shown in fig. 2 and 3, a wrench operation hexagonal milled surface 791 is formed on a shaft body of the connection shaft 79, a connection shaft head 792 is formed at an end of the connection shaft 79 facing the outside die connecting seat 42, a connection shaft head external thread 7921 is formed on an outer wall of the connection shaft head 792, and the connection shaft head external thread 7921 is internally screwed to the outside die connecting seat formed on the outside die connecting seat 42.

Preferably, a fork-shaped member piston rod connecting hole 763 is formed at the fork-shaped member 76 at a position corresponding to the piston rod 7113, a tension groove 764 is further formed at an end of the fork-shaped member 76 facing the piston rod 7113, the piston rod 7113 is inserted into the fork-shaped member piston rod connecting hole 763 and is defined by a pair of clamping screws 765 arranged on the fork-shaped member 76 at positions corresponding to the tension grooves 764 at both sides of the piston rod 7113, respectively; a piston rod sealing ring 722 is disposed at the center of the first end cap i 72, and the piston rod 7113 is in sealing engagement with the piston rod sealing ring 722.

Due to the structural relationship of the mold, the blow-molded product, such as the barrel mouth and the barrel bottom of the barrel body, needs to be sealed, the blow-up ratio in the mold closing line direction is small, the blow-up ratio of the inner cavity is large, and the micro-adjustment of the adjusting and supporting screw 62 by the inner mouth mold corresponding to the barrel body is not enough to meet the requirement, that is, the adjustment of the adjusting and supporting screw 62 by the inner mouth mold is not enough, so that the adjustment needs to be realized by the adjusting mechanism 7 for the radial wall thickness of the molten blank.

The applicant describes the working process of the radial wall thickness adjusting mechanism of the molten blank with reference to fig. 1 to 4, when the clearance of the molten blank flow channel 9b at the position or area corresponding to the outer opening die connecting seat 42 of the outer opening die 4 is increased, the oil is fed through the first oil inlet/outlet hole i 712, the oil fed into the first oil chamber i 7111 of the oil cylinder body displaces the oil cylinder piston 7113 in the direction of the second oil chamber ii 7112 of the oil cylinder body, the fork member 76 is correspondingly displaced, i.e. displaced in the same direction, by the piston rod 7113, the fork member 76 drives the connecting block 77 to correspondingly displace, i.e. displace in the same direction, by the connecting block 77, the spindle head 79 is correspondingly displaced, so that the connecting seat 792 of the connecting shaft 79 drives the outer opening die connecting seat 42, and the outer opening die 4 is driven by the connecting seat 42 to displace in the direction away from the inner opening die 3, and the width of the molten blank flow channel 9b at the position (the position or area corresponding to the outer opening die connecting seat 42 of the outer opening, the thickness of the wall of the melt blank increases and vice versa. In the above process, when the cylinder piston 711 is displaced towards the direction of the second oil chamber ii 7112 of the cylinder body, the second oil inlet/outlet hole ii 713 returns oil, and simultaneously, the sensor head 741 of the hysteresis displacement sensor 74 collects a signal and the hysteresis sensor 74 feeds the signal back to the electric controller of the blow molding machine, and when the outer port mold 4 reaches the displacement, that is, the molten blank flow channel 9b reaches the set width, the first oil inlet/outlet hole i 712 of the cylinder body 71 stops feeding oil. The utility model discloses an advantage of this kind of structural style lies in: the original core mould modification is changed into system control, so that secondary processing is reduced, and the accuracy of radial wall thickness is improved; the prior art needs to carry out different modification to the mandrel under the different states of the same die head and just can reach the requirement, and the utility model discloses a plurality of radial wall thickness adjustment mechanism 7 of fused blank of accessible are direct to be adjusted the fused blank wall thickness, have reduced workman's heavy and complicated work, directly modify through system control, directly adjust according to the technological requirement by the radial wall thickness adjustment mechanism 7 of fused blank promptly.

To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.

Claims

1. A die head structure with adjustable radial wall thickness of a molten blank comprises a lower pressure plate (1), wherein the lower pressure plate (1) is provided with a die accommodating cavity (11) which penetrates from the upper part to the lower part of the lower pressure plate; an upper platen (2), the upper platen (2) being superposed on the lower platen (1) at a position corresponding to above the lower platen (1) and fixed to the lower platen (1), the upper platen (2) having an upper platen feed chamber (21) passing through from the upper portion to the lower portion of the upper platen (2), the upper platen feed chamber (21) corresponding to and communicating with the die receiving chamber (11); an inner die (3), an outer die (4) and a core sleeve (5), the upper part of the outer die (4) protrudes into the die receiving chamber (11) and is supported on the upper part of the lower platen (1), the lower part of the outer die (4) extends below the lower platen (1), the inner die (3) is located in the outer die (4), the upper part of the inner die (3) is matched with the lower part of the core sleeve (5), the lower part of the inner die (3) also extends below the lower platen (1) and is flush with the lower part of the outer die (4), the space between the outer wall of the core sleeve (5) and the inner wall of the upper part of the outer die (4) is formed as a melt guiding chamber (9a), the space between the outer wall of the inner die (3) and the inner wall of the lower part of the outer die (4) is formed as a melt guiding flow channel (9b), and the space between the lower edge of the inner die (3) and the lower edge of the outer die (4) is formed as a melt guiding outlet (9c), the anti-deformation inner mouth die is characterized by further comprising an inner mouth die anti-deformation supporting mechanism (6) and a plurality of fused blank radial wall thickness adjusting mechanisms (7) with the same interval distance, wherein the inner mouth die anti-deformation supporting mechanism (6) is fixed with the bottom of the core shaft sleeve (5), the fused blank radial wall thickness adjusting mechanisms (7) are fixed with the outer wall of the lower pressing plate (1) in a horizontal cantilever state, and extend into the mouth die accommodating cavity (11) at positions corresponding to connecting shaft abdicating holes (12) which are formed in the lower pressing plate (1) and communicated with the mouth die accommodating cavity (11) to be connected with the lower part of the outer mouth die (4), and the inner mouth die (3) is sleeved outside the inner mouth die anti-deformation supporting mechanism (6).

2. The die head structure for adjusting the radial wall thickness of a billet according to claim 1, wherein fixing holder fitting grooves (13) recessed in the outer wall surface of the lower platen (1) by the same amount as that of the billet radial wall thickness adjusting mechanism (7) are formed on the outer wall of the lower platen (1) and at positions corresponding to the connecting shaft relief holes (12), an outer opening die expanding flange edge supporting groove (14) is formed at the periphery of the upper surface of the lower pressing plate (1) and at a position corresponding to the upper part of the outer opening die (4), an outer opening mold expanding flange edge (41) is formed on the outer wall of the upper part of the outer opening mold (4) and around the outer opening mold (4), the outer opening die expanding flange edge (41) is supported on the outer opening die expanding flange edge supporting groove (14), and the side surface of the outer opening die expanding flange edge (41) facing upwards is limited by the bottom surface of the upper pressure plate (2); an inner mouth mold step ring (31) is formed at the upper part of the inner mouth mold (3) and around the inner mouth mold (3), a core shaft sleeve step cavity (51) is formed at the lower part of the core shaft sleeve (5) and around the core shaft sleeve (5), the inner mouth mold step ring (31) is matched with the core shaft sleeve step cavity (51), and the downward side of the inner mouth mold step ring (31) is also covered on the inner mouth mold anti-deformation supporting mechanism (6).

3. The die head structure with the adjustable radial wall thickness of the molten blank according to claim 2, wherein the inner mouth mold deformation-preventing support mechanism (6) comprises an end cover (61) and a group of inner mouth mold adjusting and supporting screws (62), the end cover (61) is provided with an end cover cavity (611), an end cover lifting actuating rod hole (61111) is arranged at the central position of the top wall (6111) of the end cover cavity (611), a stack ring (61112) is arranged at the peripheral edge part of the upward side of the top wall (6111) of the end cover cavity, the group of inner mouth mold adjusting and supporting screws (62) are arranged on the end cover (61) at intervals around the periphery of the lower part of the end cover (61) and the group of inner mouth mold adjusting and supporting screws (62) extend out of the outer wall of the end cover (61) to be in contact with the inner wall of the inner mouth mold (3), the inner mouth mold step ring (31) of the inner mouth mold (3) is covered on the stack ring (61112), the peripheral inner wall of the inner mouth mold (3) is contacted with the peripheral outer wall of the end cover (61); the lower part of the core shaft sleeve (5) is fixed with the upward side of the top wall (6111) of the end cover cavity in the stack ring (61112) through a core shaft sleeve fixing screw (52), and a core shaft sleeve cavity (53) of the core shaft sleeve (5) corresponds to and is communicated with the end cover lifting actuating rod hole (61111).

4. The die head structure with adjustable radial wall thickness of the molten blank according to claim 3, wherein a mandrel sleeve stopper (63) is fixed at the central position of the upward side of the end cover cavity top wall (6111) by a mandrel sleeve stopper fixing screw (631), and the outer wall of the mandrel sleeve stopper (63) is matched with the inner wall of the lower part of the mandrel sleeve cavity (53) of the mandrel sleeve (5); the end cover (61) is bell-shaped.

5. The die head structure with the adjustable radial wall thickness of the molten blank according to claim 2, characterized in that upper platen fixing screw holes (15) are arranged on the lower platen (1) and around the periphery of the lower platen (1) at intervals, upper platen fixing screws (151) are arranged in the upper platen fixing screw holes (15), upper platen screw holes (22) are arranged on the upper platen (2) and at positions corresponding to the upper platen fixing screws (151), and the upper platen fixing screws (151) are screwed into the upper platen screw holes (22); a lower platen heater (16) is arranged on the outer wall of the lower platen (1), and an upper platen heater (23) is arranged on the outer wall of the upper platen (2).

6. The die head structure of adjustable radial wall thickness of the molten billet according to claim 2, characterized in that an outer die connecting seat (42) is formed on the outer wall of the lower portion of the outer die (4) and at a position corresponding to the connecting shaft relief hole (12), the molten billet radial wall thickness adjusting mechanism (7) fixed to the outer wall of the lower platen (1) in a horizontal cantilever state at a position corresponding to the connecting shaft relief hole (12) and the fixing support fitting groove (13) is connected to the outer die connecting seat (42), and the number of the molten billet radial wall thickness adjusting mechanisms (7) is two, three or four arranged at equal intervals around the periphery of the lower platen (1).

7. The die structure with adjustable thickness of the radial wall of the molten blank according to claim 6, characterized in that the inner die (3) and the outer die (4) are made of spring steel, and the spring steel is 50CrVA spring steel.

8. The die head structure of the adjustable radial wall thickness of the molten blank according to claim 6, wherein the adjusting mechanism (7) of the radial wall thickness of the molten blank comprises an oil cylinder body (71), a first end cover I (72), a second end cover II (73), a hysteresis displacement sensor (74), a supporting shaft plate (75), a fork (76), a fork connecting block (77), a pair of fixing brackets (78) and a connecting shaft (79), the connecting shaft (79) is horizontally movably arranged on the lower platen (1) at a position corresponding to the connecting shaft yielding hole (12) and one end of the connecting shaft (79) facing the outer die connecting block (42) is connected with the outer die connecting block (42), one end of the connecting shaft (79) far away from the outer die connecting block (42) is connected with one end of the fork connecting block (77) facing the lower platen (1), the pair of fixing brackets (78) correspond to each other and one end of the pair of fixing brackets (78) facing the lower platen (1) is arranged at one end of the platen (1) The positions corresponding to the fixed support matching grooves (13) are respectively fixed with the lower pressure plate (1) through fixed support screws (781), one ends of a pair of fixed supports (78) far away from the lower pressure plate (1) are formed into horizontal cantilever ends, a fixed support connecting plate (782) is respectively fixed between the upper part and the lower part through fixed support connecting plate screws (7821), a tip screw adjusting abdicating hole (783) is respectively arranged at the middle part of the pair of fixed supports (78) and at the corresponding position, the space between the pair of fixed supports (78) is formed into a fork-shaped part accommodating cavity (784), a fork-shaped part (76) is arranged in the fork-shaped part accommodating cavity (784), a tip screw seat (7611) is respectively formed on the outer wall of a pair of fork-shaped part arms (761) of the fork-shaped part (76) and at the corresponding position, a tip screw (76111) is screwed on the tip screw seat (7611), the tip screw (76111) projects into the tip screw adjustment relief hole (783) toward one end of the pair of fixing brackets (78), the tip screw (76111) projects into a fork chamber (762) of the fork (76) toward one end of the fork (76), the fork connecting block (77) extends into the fork chamber (762) toward one end of the fork (76), the tip screw (76111) locks both sides of the fork connecting block (77) in the fork chamber (762) toward one end of the fork (76), the support shaft plate (75) is fixed between the ends of the pair of fixing brackets (78) toward the first end cover I (72) by a support shaft plate fixing screw (751), and the first end cover I (72) is fixed to the oil cylinder body (71) by a first end cover screw I (721) at a position between the support shaft plate (75) and the oil cylinder body (71), an oil cylinder piston (711) is arranged in the oil cylinder body (71), the oil cylinder piston (711) is arranged in the oil cylinder body (71) to separate a first oil cavity I (7111) of the oil cylinder body and a second oil cavity II (7112) of the oil cylinder body, the first oil cavity I (7111) of the oil cylinder body is communicated with a first oil inlet and outlet hole I (712) formed in the oil cylinder body (71), a second oil cavity II (7112) of the oil cylinder body is communicated with a second oil inlet and outlet hole II (713) formed in the oil cylinder body (71), a piston rod (7113) extends towards the central position of one side of the first end cover I (72) of the oil cylinder piston (711), the piston rod (7113) is connected with a fork-shaped part (76) after sequentially passing through the first end cover I (72) and a supporting shaft plate (75), the second end cover II (73) is fixed with one side, back to the first end cover I (72), of the oil cylinder body (71) through a second end cover fixing screw II (731), and the position of the second end cover II (73) corresponds to the position of the first end cover I (72), the hysteresis displacement sensor (74) is fixed with the central position of the second end cover II (73) in a horizontal state, and a sensing head (741) of the hysteresis displacement sensor (74) is connected with the oil cylinder piston (711) after sequentially passing through a sensing head abdicating hole (732) in the central position of the second end cover II (73) and the second oil chamber II (7112) of the oil cylinder body.

9. The die structure of adjustable radial wall thickness of the billet according to claim 8, characterized in that a wrench-operated hexagonal mill plane (791) is formed on the shaft body of the connecting shaft (79), and the end of the connecting shaft (79) facing the outer die connecting seat (42) is formed with a connecting shaft head (792), and a connecting shaft head external thread (7921) is formed on the outer wall of the connecting shaft head (792), and the connecting shaft head external thread (7921) is in threaded connection with the outer die connecting seat internal thread formed on the outer die connecting seat (42).

10. The die structure with adjustable radial wall thickness of molten blank according to claim 8, characterized in that a fork-shaped member piston rod connecting hole (763) is formed on the fork-shaped member (76) and at a position corresponding to the piston rod (7113), a tensioning groove (764) is further formed at one end of the fork-shaped member (76) facing the piston rod (7113), the piston rod (7113) is inserted into the fork-shaped member piston rod connecting hole (763) and is defined by a pair of clamping screws (765) arranged on the fork-shaped member (76) and respectively corresponding to two sides of the piston rod (7113), and the position of the pair of clamping screws (765) on the fork-shaped member (76) is located at the position of the tensioning groove (764); and a piston rod sealing ring (722) is arranged at the central position of the first end cover I (72), and the piston rod (7113) is in sealing fit with the piston rod sealing ring (722).