Double-layer guide flow storage type die structure of blow molding machine

Abstract

A double-layer guide storage type die head structure of a blow molding machine belongs to the technical field of blow molding machine machinery. It comprises a storage core, a storage cylinder and a material injection mechanism. The material injection mechanism comprises a material pushing top rod lower fixing disc, a set of material pushing top rods, a molten material transition disc, a flow dividing disc, a guide sleeve material leading disc, an inner guide sleeve, a middle guide sleeve and an outer guide sleeve. The set of material pushing top rods are distributed in a circumferential direction with intervals and the upper ends are connected with a material pushing top rod driving mechanism and the lower ends are fixed with the material pushing top rod lower fixing disc after penetrating through the storage cylinder cover. A material pushing top rod first molten material leading hole is arranged on a material pushing top rod corresponding to a first molten material leading hole of the storage cylinder cover in the set of material pushing top rods. A material pushing top rod second molten material leading hole is arranged on a material pushing top rod corresponding to a second molten material leading hole of the storage cylinder cover in the set of material pushing top rods. The advantages are that two different molten materials are well blended and uniformly mixed to meet the quality requirements of the containers to be blow molded, the structure is simplified and the adhered molten material is easy to clean.

Description

Technical Field

[0001] This invention belongs to the field of blow molding machine technology, specifically relating to a double-layer guide and storage die head structure for a blow molding machine. Background Technology

[0002] A blow molding machine is equipment used to blow-form various hollow plastic containers. Since there are countless examples of hollow plastic containers, the applicant will not provide specific examples. The die head is a crucial part of the blow molding machine, arguably its core component. When the walls of the blow-formed hollow plastic container are made of a single material, double-layered material, or multi-layered material, the die head structure will change accordingly. More specifically, the injection mechanism of the die head structure system will undergo corresponding changes.

[0003] In recent years, the use of composite medium bulk containers ("IBC containers," also known as "IBC tonnes") for storing and transporting liquids has been steadily increasing. This is because IBC containers are composed of a high-molecular-weight polyethylene inner container and an outer metal frame, giving them high strength, corrosion resistance, and good hygiene properties. They are suitable for various applications, including: the chemical industry for transporting coatings, paints, resins, and chemical solvents; the food industry for storing and transporting edible oils, beverages, and condiments; the pharmaceutical industry for storing and transporting medicines and medical supplies; agriculture and animal husbandry for storing and transporting agricultural materials such as pesticides, fertilizers, and feed; and the logistics and transportation industry for packaging and transporting liquid fuels, lubricants, and so on. In short, IBC containers are favored by many industries due to their large capacity, moisture-proof, rust-proof, and corrosion-resistant features, making them an essential tool for modern warehousing and transportation.

[0004] To improve the physicochemical properties of high molecular weight polyethylene (HMWPE) inner containers, HMWPE4261A / BASF (BASF) material, which is a mixture of high molecular weight polyethylene and thermoplastic high-density polyethylene resin, is commonly used as the material for IBC containers. To obtain hollow plastic containers (i.e., IBC containers) made of this material, a corresponding die head structure is required. That is, the injection mechanism of the die head structure system ensures that the two different materials enter the storage cavity in parallel through their respective flow channels in their respective proportions to achieve blending. Then, the molten preform is extruded from the die head into the mold of the blow molding machine. The blow molding machine's inflation mechanism (also known as the air blowing mechanism or blow needle mechanism) inflates the preform in the aforementioned mold to form an IBC container.

[0005] Furthermore, since consistent wall thickness is a stringent requirement for IBC barrels, if the blow molding die is supplied with molten blank using a conventional die head structure, the rotation of the die head components will cause spiral marks on the molten blank, ultimately resulting in inconsistent wall thickness in the blow-molded IBC barrel. However, a rationally designed melt flow channel can eliminate these spiral marks.

[0006] While CN106003665B's recommended "double-layer guide-flow storage die head structure for blow molding machines" achieves the three technical effects summarized in paragraph 0019 of its instruction manual—especially the separation of the plastic melt into inner and outer layers by a pair of guide grooves in the intermediate guide sleeve and the inner guide sleeve, respectively arranged at 180° intervals—ensuring the uniformity of the plastic melt wall thickness and ultimately resulting in a more uniform wall thickness for the blow-molded hollow plastic container, it has the following drawbacks: Firstly, due to... Two different materials are introduced into the feed tube via a plastic melt inlet connector, and then guided downwards from the feed tube to the distribution plate (including an upper distribution plate and a lower distribution plate). This makes the structure relatively complex because the push rod and the feed tube each have their own functions and cannot be combined. Furthermore, an additional feed tube cap is needed to secure the feed tube to the storage cylinder; otherwise, the feed tube will wobble during operation, affecting the accurate introduction of the material into the distribution plate's guide groove. Secondly, this patent is designed to meet the requirements of the desired processing (i.e., the most...). Designed to meet the different material requirements of the inner and outer walls of the final blow-formed container, the lower part of the intermediate guide sleeve in the height direction of the injection mechanism is significantly recessed between the inner and outer guide sleeves. This ensures that the melts formed from the two different materials (melted and extruded by the screw extruder) flow separately along the outer wall of the inner guide sleeve and the inner wall of the outer guide sleeve into the storage cylinder cavity after leaving the area between the lower part of the intermediate guide sleeve and the inner and outer guide sleeves. However, this design of inner, middle, and outer guide sleeves is not suitable for applications requiring the mixing of two different materials. In cases where materials are to be blended uniformly, this approach is ineffective. The so-called uniform blending is the opposite of what was mentioned above. The two different melts first flow downwards from the melt flow channels between the inner wall of the middle guide sleeve and the outer wall of the inner guide sleeve, and from the melt flow channels between the outer wall of the middle guide sleeve and the inner wall of the outer guide sleeve. After flowing away from the lower part of the inner and outer guide sleeves, the two melts then follow the middle guide sleeve to enter the storage cylinder cavity of the storage cylinder in a state of near-uniform blending, so as to achieve a good and uniform mixing effect of the two melts in the storage cylinder cavity. Therefore, a substantial change must be made to the structural relationship between the inner, middle, and outer guide sleeves; thirdly, since melt will inevitably adhere to the outer wall of the storage core and the inner wall of the storage cylinder, the inner and outer guide sleeves of the injection mechanism of this patent do not have the function of removing the melt adhering to the outer wall of the storage core and the inner wall of the storage cylinder respectively. Especially during relatively long downtime, the previously adhered melt will tend to scale. When restarting, the scaled material will affect the initial few melt billets, and ultimately affect the quality of the initial few blown melts (resulting in defects). Summary of the Invention

[0007] The objective of this invention is to provide a double-layer flow-guiding storage die head structure for a blow molding machine that facilitates the good and uniform mixing of two different molten materials to meet the quality requirements of the container to be blow-molded, allows the pusher corresponding to the molten material inlet in a set of pusher rods to also serve as a feed pipe and directly guide the material to the distribution plate, thus simplifying the structure, enables the two melts to be separated by only one distribution plate, thus reducing the number of parts, and facilitates the cleaning of the outer wall of the storage core and the inner wall of the storage cylinder to avoid scale buildup causing defects in the molded container.

[0008] The objective of this invention is achieved as follows: a double-layer guide-flow storage die head structure for a blow molding machine, comprising a storage core, a storage cylinder, and an injection mechanism. The storage cylinder is located outside the storage core, and a storage cylinder cover is provided at the upper end of the storage cylinder. The storage cylinder cover is supported on a storage cylinder cover support platform. A first melt inlet hole and a second melt inlet hole are provided on the storage cylinder cover and spaced 180° apart around its circumference. The injection mechanism includes a lower fixing plate for the pusher rods, a set of pusher rods, a melt transition plate, a flow divider plate, a guide sleeve guide plate, an inner guide sleeve, a middle guide sleeve, and an outer guide sleeve. The set of pusher rods are circumferentially spaced and their upper ends are connected to the pusher rods. The rod is connected to the drive mechanism, and its lower end is fixed to the lower fixing plate of the push rod after passing through the storage cylinder cover. A push rod with a first molten material inlet hole is provided on one of the push rods corresponding to the first molten material inlet hole of the storage cylinder cover. This first molten material inlet hole communicates with the first molten material through hole of the molten material transition plate, which is located on the molten material transition plate and extends through the thickness direction of the molten material transition plate, via the longitudinal center inlet hole of the push rod. A push rod with a second molten material inlet hole is also provided on one of the push rods corresponding to the second molten material inlet hole of the storage cylinder cover. A pusher rod has a second molten material inlet hole. This second molten material inlet hole communicates with a second molten material through-hole on the molten material transition plate, which is located below the lower fixed plate of the pusher rod and below the molten material transition plate. A flow divider plate is located below the molten material transition plate. A first semi-circular arc-shaped flow divider groove and a second semi-circular arc-shaped flow divider groove are formed on the upward-facing side of the molten material transition plate. Each end of the first semi-circular arc-shaped flow divider groove forms a first molten material outlet hole, and each end of the second semi-circular arc-shaped flow divider groove forms a... A second molten material outlet hole is provided in the flow divider. The first and second molten material outlet holes of the flow divider penetrate the thickness direction of the flow divider plate. The first melt through-hole of the molten material transition plate communicates with the first molten material semi-circular arc-shaped flow divider of the transition plate, while the second melt through-hole of the molten material transition plate communicates with the second molten material semi-circular arc-shaped flow divider of the transition plate. The guide sleeve feed plate is located below the flow divider plate and is fixed to the upper end faces of the inner guide sleeve, the middle guide sleeve, and the outer guide sleeve. A first molten material outlet hole is provided on the guide sleeve feed plate, corresponding to the position of the first molten material outlet hole of the flow divider, penetrating the thickness direction of the guide sleeve feed plate and communicating with the first molten material outlet hole of the flow divider.A pair of second molten material outlet holes, which are also formed through the thickness direction of the guide sleeve feed plate and are isolated from the outer side of the first molten material outlet hole of the feed plate, are provided at the position corresponding to the second molten material outlet hole of the diversion channel. The inner guide sleeve is accommodated in the middle guide sleeve cavity of the middle guide sleeve. A pair of herringbone-shaped guide grooves are formed on the outer wall of the inner guide sleeve, which are positioned opposite each other and recessed into the outer surface of the inner guide sleeve. The middle of the pair of herringbone-shaped guide grooves is located in the middle of the inner guide sleeve. Above the position is a longitudinal feed groove for introducing the melt into the herringbone-shaped guide channel of the inner guide sleeve, which communicates with the herringbone guide channel of the inner guide sleeve. A set of scraping and cleaning ribs for the storage core are formed at intervals along the circumference of the inner guide sleeve cavity wall of the inner guide sleeve, contacting the outer wall of the storage core. The intermediate guide sleeve is housed within the outer guide sleeve cavity of the outer guide sleeve. Correspondingly positioned recesses are formed on the outer wall of the intermediate guide sleeve. A pair of intermediate guide sleeves with herringbone-shaped guide grooves are provided. Above the center of the pair of intermediate guide sleeves with herringbone-shaped guide grooves, a longitudinal feed groove for introducing melt into the intermediate guide sleeves with herringbone-shaped guide grooves is formed, which communicates with the intermediate guide sleeves with herringbone-shaped guide grooves. The second molten material outlet hole of the feed plate corresponds to and communicates with the longitudinal feed groove of the intermediate guide sleeves with herringbone-shaped guide grooves. A melt passage notch is provided on the upper surface of the intermediate guide sleeves at a position corresponding to the longitudinal feed groove of the intermediate guide sleeves with herringbone-shaped guide grooves. The molten material passage notch corresponds to the first molten material outlet hole of the feed plate and communicates with both the first molten material outlet hole of the feed plate and the longitudinal feed groove of the herringbone-shaped guide groove of the inner guide sleeve. The outer guide sleeve is housed within the storage cylinder cavity of the storage cylinder. A set of scraping and cleaning ribs for the inner wall of the storage cylinder are formed at intervals around the circumference of the outer guide sleeve on the lower part of its outer wall, contacting the cavity wall of the storage cylinder cavity. The lower end of the intermediate guide sleeve extends below the inner and outer guide sleeves, and the longitudinal cross-sectional shape of the lower end of the intermediate guide sleeve is rhomboid.

[0009] In a specific embodiment of the present invention, a material storage core through hole is formed at the center of the lower fixed plate of the pusher rod, a material storage core through hole is formed at the center of the molten material transition plate, a material storage core through hole is formed at the center of the diverter plate, and a material storage core through hole is formed at the center of the guide sleeve feed plate. The upper end face of the inner guide sleeve, the guide sleeve feed plate, the diverter plate, the molten material transition plate, and the lower fixed plate of the pusher rod are stacked sequentially from bottom to top and slidably fitted around the material storage core. A material storage core upper end fitting hole is formed at the center of the material storage cylinder cover. The upper end of the material storage core protrudes upward through the material storage core upper end fitting hole and extends out of the upper surface of the material storage cylinder cover and is locked by the upper end locking nut of the material storage core.

[0010] In another specific embodiment of the present invention, the diameters of the material storage core through hole of the lower fixed plate of the pusher rod, the material storage core through hole of the molten material transition plate, the material storage core through hole of the diverter plate, the material storage core through hole of the guide sleeve, and the inner guide sleeve cavity of the inner guide sleeve are the same.

[0011] In another specific embodiment of the present invention, the gap formed between the outer wall of the inner guide sleeve and the inner wall of the intermediate guide sleeve constitutes a first molten material flow channel, and the gap formed between the outer wall of the intermediate guide sleeve and the inner wall of the outer guide sleeve constitutes a second molten material flow channel; the space at the lower part of the storage cylinder cavity of the storage cylinder constitutes a storage cylinder storage cavity; a support plate threaded mating hole is opened on the storage cylinder cover support platform and at the position corresponding to the storage cylinder cover, and a support plate is threadedly mated at the position corresponding to the support plate threaded mating hole; the storage cylinder cover is fixed to the support plate by storage cylinder cover support fixing screws spaced apart around its perimeter.

[0012] In another specific embodiment of the present invention, an inner guide sleeve fixing screw, a middle guide sleeve fixing screw, and an outer guide sleeve fixing screw are provided at intervals on the guide sleeve feed plate and around the circumference of the guide sleeve feed plate. The middle guide sleeve fixing screw is located outside the inner guide sleeve fixing screw, and the outer guide sleeve fixing screw is located outside the middle guide sleeve fixing screw. An inner guide sleeve fixing screw hole corresponding to the inner guide sleeve fixing screw is provided at intervals around the upper surface of the inner guide sleeve. A middle guide sleeve fixing screw hole corresponding to the middle guide sleeve fixing screw is provided at intervals around the middle guide sleeve. An outer guide sleeve fixing screw hole corresponding to the outer guide sleeve fixing screw is provided at intervals around the outer guide sleeve. The inner guide sleeve fixing screw is fixed to the inner guide sleeve fixing screw hole, the middle guide sleeve fixing screw is fixed to the middle guide sleeve fixing screw hole, and the outer guide sleeve fixing screw is fixed to the outer guide sleeve fixing screw hole.

[0013] In another specific embodiment of the present invention, the lower fixing plate of the pusher rod is provided with a guide sleeve feed plate inner fixing screw, a diverter plate fixing screw, and a guide sleeve feed plate outer fixing screw at intervals around the lower fixing plate of the pusher rod. The diverter plate fixing screw is located outside the guide sleeve feed plate inner fixing screw, and the guide sleeve feed plate outer fixing screw is located outside the diverter plate fixing screw. The molten material transition plate is provided with through holes for molten material transition plate inner fixing screws corresponding to the guide sleeve feed plate inner fixing screws, through holes for molten material transition plate middle screws corresponding to the diverter plate fixing screws, and through holes for molten material transition plate outer fixing screws corresponding to the guide sleeve feed plate outer fixing screws at intervals around the molten material transition plate. The diverter plate is provided with through holes for diverter plate inner fixing screws corresponding to the guide sleeve feed plate inner fixing screws, through holes for diverter plate middle screws corresponding to the diverter plate fixing screws, and through holes for diverter plate middle screws corresponding to the diverter plate fixing screws at intervals around the molten material transition plate. The guide sleeve feed plate has corresponding fixing screw holes and external fixing screw through holes corresponding to the external fixing screws of the guide sleeve feed plate. Around the guide sleeve feed plate, there are spaced-apart internal fixing screw holes corresponding to the internal fixing screws of the guide sleeve feed plate and external fixing screw holes corresponding to the external fixing screws of the guide sleeve feed plate. The internal fixing screw of the guide sleeve feed plate passes through the internal fixing screw through holes of the molten material transition plate and the internal fixing screw through holes of the guide sleeve feed plate from top to bottom, and then screws into the internal fixing screw hole of the guide sleeve feed plate. The fixing screw of the feed plate passes through the middle screw through hole of the molten material transition plate from top to bottom, and then screws into the fixing screw hole of the feed plate. The external fixing screw of the guide sleeve feed plate is screwed into the external fixing screw through holes of the molten material transition plate and the external fixing screw through holes of the feed plate from top to bottom, and then screws into the external fixing screw hole of the guide sleeve feed plate.

[0014] In a further specific embodiment of the present invention, inner ring fixing screws and outer ring fixing screws of the diverter plate are provided at intervals on the molten material transition plate and around the circumference of the molten material transition plate. The inner ring fixing screws and outer ring fixing screws of the diverter plate are fixed to the inner ring fixing screw holes and outer ring fixing screw holes of the diverter plate respectively, which are opened on the diverter plate. A pair of alignment pins are also provided on the molten material transition plate. The upper end of the alignment pin protrudes from the upper surface of the molten material transition plate and enters the alignment pin insertion hole opened on the lower fixing plate of the push rod, while the lower end of the alignment pin protrudes from the lower surface of the molten material transition plate and enters the alignment pin insertion hole opened on the diverter plate.

[0015] In a further specific embodiment of the present invention, a mold sleeve mechanism is connected to the lower part of the storage cylinder. The mold sleeve mechanism includes a mold sleeve base, an outer mold, an outer mold connecting plate, and a connecting pressure ring. The upper end of the mold sleeve base is mated with the lower end of the storage cylinder. A pressure ring fixing connecting flange is formed on the outer wall of the lower end of the mold sleeve base and around the circumference of the mold sleeve base. The connecting pressure ring is located below the pressure ring fixing connecting flange and is fixed to the pressure ring fixing connecting flange by spaced-apart connecting pressure ring fixing screws. The upper part of the outer mold is fixed to the outer mold connecting plate by outer mold fixing screws, and the bottom of the outer edge of the outer mold connecting plate in the circumferential direction is supported on the bottom wall of the connecting pressure ring cavity of the connecting pressure ring. The lower end of the storage core extends into the mold sleeve base cavity of the mold sleeve base, and a central pull is provided in the longitudinal central hole of the storage core, which is movable up and down. The central pull rod extends upwards above the storage core and passes through the push rod drive mechanism to connect with the central pull rod lifting mechanism above the push rod drive mechanism. The lower end of the central pull rod extends out of the storage core and is equipped with an inner mold mechanism. The inner mold mechanism includes a guide sleeve, an inner mold, and an inner mold limiting nut that move with the central pull rod. The guide sleeve is located above the inner mold and is connected to the top of the inner mold by spaced guide sleeve connecting screws. The inner mold limiting nut is located inside the inner mold cavity of the inner mold and is fixed to the lower end of the central pull rod that extends into the inner mold cavity. The gap between the outer wall of the guide sleeve and the upper inner wall of the outer mold forms a melt transition channel communicating with the storage cavity of the storage cylinder, while the gap between the outer wall of the inner mold and the lower inner wall of the outer mold forms a melt outlet channel.

[0016] In yet another specific embodiment of the present invention, the push rod driving mechanism includes a push rod cylinder body, an upper cylinder cover, a lower cylinder cover, a push rod piston, and a central tie rod spacer. The upper cylinder cover is fixed to the upper end of the push rod cylinder body, and the lower cylinder cover is fixed to the lower end of the push rod cylinder body. The push rod piston is disposed within the piston cavity of the push rod cylinder body. The upper end of the central tie rod spacer extends above the push rod piston and is fixed to the upper cylinder cover, while the lower end of the central tie rod spacer is supported on the lower cylinder cover. The upper and lower outer walls of the central tie rod spacer are sealed to the upper and lower cylinder covers respectively via sealing rings. The central position of the push rod piston is located at the center of the cylinder. The sealing ring and the outer wall of the central tie rod spacer form a sliding sealing fit; the upper end of the set of push rods passes through the push rod hole on the lower cylinder cover of the push rod and enters the piston chamber of the push rod cylinder body and is fixed to the downward-facing side of the push rod piston. A sealing ring for the push rod hole is provided on the wall of the push rod hole to seal with the push rod. The upper end of the central tie rod passes sequentially from bottom to top through the central tie rod hole in the lower cylinder cover of the push rod and the central tie rod spacer hole in the central tie rod spacer, and then connects upwards to the central tie rod lifting mechanism. A support plate is fixed below the lower cylinder cover of the push rod by a support plate fixing screw, and a support member is provided between the support plate and the opposite side of the storage cylinder cover.

[0017] In yet another specific embodiment of the present invention, the central pull rod lifting mechanism includes a pull rod cylinder body, a pull rod cylinder upper cover, a pull rod lifting piston, a pull rod lifting piston stroke adjusting sleeve, and an adjusting sleeve locking nut. The pull rod cylinder upper cover is fixed to the upper end of the pull rod cylinder body, while the lower end of the pull rod cylinder body is supported on the upper cover of the push rod cylinder, which also serves as the lower cover of the pull rod cylinder. The upper and lower inner walls of the pull rod cylinder body are sealed to the upper cover of the pull rod cylinder and the upper cover of the push rod cylinder respectively by a pull rod cylinder body sealing ring. The pull rod lifting piston is disposed within the piston cavity of the pull rod cylinder body, and the pull rod lifting piston is sealed to the cavity wall of the piston cavity by a pull rod lifting piston sealing ring. The pull rod lifting piston faces... A lower fitting end of a lifting piston extends downward from the middle of the lower side. This lower fitting end of the lifting piston is in a sliding state and is sealed with the center hole of the upper cylinder cover of the push rod cylinder. A upper fitting end of a lifting piston extends upward from the middle of the upper side of the lifting piston. This upper fitting end of the lifting piston is in a sliding state and is sealed with the center hole of the upper cylinder cover of the pull rod cylinder. The upper end of the central pull rod extends upward through the center hole of the lifting piston and reaches above the upper cylinder cover of the pull rod cylinder. The stroke adjustment sleeve of the lifting piston is fixed to the upper end of the central pull rod at a position above the upper cylinder cover of the pull rod cylinder and is connected to the upper fitting end of the lifting piston by a piston connecting screw. The locking nut of the adjustment sleeve is threaded with the central pull rod at a position above the stroke adjustment sleeve of the lifting piston.

[0018] One of the technical effects of the present invention is that, because a pair of herringbone-shaped guide grooves for the inner guide sleeve and a pair of herringbone-shaped guide grooves for the middle guide sleeve are respectively opened on the outer wall of the inner guide sleeve and the middle guide sleeve in the structural system of the injection mechanism, and the lower end of the middle guide sleeve is extended to the bottom of the inner and outer guide sleeves and the longitudinal cross-sectional shape of its lower end is designed as a rhombus, it can satisfy the requirement of introducing two different molten materials into the storage cavity of the storage cylinder, and satisfy the requirement of uniform mixing of the two different molten materials, thus ensuring the quality of the container to be blown and molded; secondly, because a set of push rods is used Two of the push rods in the design also function as feed pipes, thus eliminating the need for an additional independent feed pipe as required by existing technologies, which greatly simplifies the structure. Thirdly, since a set of scraping and cleaning ribs for the storage core is formed on the lower part of the cavity wall of the inner guide sleeve, the lower outer wall of the storage core can be cleaned. Furthermore, since a set of scraping and cleaning ribs for the inner wall of the storage cylinder is formed on the lower outer wall of the outer guide sleeve, the lower inner wall of the storage cylinder can be cleaned, preventing the molten material from forming scale that could cause defects in the final molded container. Fourthly, since only one diverter plate is needed compared to existing technologies, the structure is further simplified. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention; Figure 2 for Figure 1 The assembly structure diagram of the injection mechanism is shown; Figure 3 for Figure 1 Enlarged view of part A; Figure 4 for Figure 1 and Figure 2 The diagram shows a detailed structural diagram of the distribution plate. Figure 5 for Figure 2 The diagram shows the unfolded shape of the inner guide sleeve. Detailed Implementation

[0020] To better understand the technical essence and beneficial effects of the present invention, detailed descriptions will be provided below using embodiments. However, the descriptions of the embodiments are not intended to limit the scope of the present invention. Any formal but not substantive equivalent transformations made based on the concept of the present invention should be considered within the scope of the present invention.

[0021] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back are based on... Figure 1 The location and state of the object are examples, and therefore should not be construed as a special limitation on the technical solution provided by the present invention.

[0022] Please see Figure 1 and Figure 2 The diagram shows a material storage core 1, a material storage cylinder 2, and a material injection mechanism 3. The material storage cylinder 2 is located outside the material storage core 1. More specifically, the material storage core 1 is located in the center of the material storage cylinder 2. A material storage cylinder cover 21 is provided at the upper end of the material storage cylinder 2. The material storage cylinder cover 21 is supported on a material storage cylinder cover support platform 213. A first melt material inlet hole 211 and a second melt material inlet hole 212 are provided on the material storage cylinder cover 21 and around its circumference at intervals of 180°. In this embodiment, the first melt material mentioned above and mentioned below is high molecular weight polyethylene (HMWPE), and the second melt material mentioned above is thermoplastic high-density polyethylene resin (HDPE).

[0023] As a key technical feature of this invention, the aforementioned injection mechanism 3 includes a lower fixing plate 31 for the pusher rod, a set of pusher rods 32, a molten material transition plate 33, a diversion plate 34, a guide sleeve feeding plate 35, an inner guide sleeve 36, a middle guide sleeve 37, and an outer guide sleeve 38. The set of pusher rods 32 are distributed circumferentially and their upper ends are connected to the pusher rod driving mechanism 4, while their lower ends are fixed to the lower fixing plate 31 after passing through the aforementioned storage cylinder cover 21. On one of the pusher rods 32 corresponding to the first molten material inlet hole 211 of the aforementioned storage cylinder cover, a pusher rod first molten material inlet hole 321 is opened at a position corresponding to the first molten material inlet hole 211 of the storage cylinder cover. The first melt material inlet hole 321 of the pusher rod communicates with the first melt material through hole 331 of the molten material transition plate, which is located at the center of the lower end of the pusher rod and extends through the thickness direction (here and below, the thickness direction refers to the dimension between the upper and lower surfaces) of the molten material transition plate 33. On one of the pusher rods 32, corresponding to the second melt material inlet hole 212 of the storage cylinder cover, a second melt material inlet hole 322 is provided at a position corresponding to the second melt material inlet hole 212 of the storage cylinder cover. This second melt material inlet hole 322 is located at the center of the lower end of the pusher rod. The second molten material longitudinal center guide hole 3221 of the pusher rod at the lower center position communicates with the second molten material through hole 332 of the molten material transition plate 33, which is opened on the molten material transition plate 33 and also penetrates the thickness direction of the molten material transition plate 33. The molten material transition plate 33 is located below the aforementioned pusher rod lower fixed plate 31, and the diversion plate 34 is located below the molten material transition plate 33. A first molten material semi-circular arc-shaped diversion groove 341 (also called a C-shaped diversion groove) and a second molten material semi-circular arc-shaped diversion groove 342 (also called a C-shaped diversion groove) are opened on the upward-facing side of the molten material transition plate 33. Each end of the first molten material semi-circular arc-shaped diversion groove 341 of the transition plate is formed with a The first molten material outlet hole 3411 of the diversion channel and the second molten material semi-circular arc-shaped diversion channel 342 of the transition plate each have a second molten material outlet hole 3421 at both ends. The first molten material outlet hole 3411 and the second molten material outlet hole 3421 of the diversion channel penetrate the thickness direction of the diversion plate 34. The first melt through hole 331 of the aforementioned molten material transition plate communicates with the first molten material semi-circular arc-shaped diversion channel 341 of the aforementioned transition plate, and the second melt through hole 332 of the aforementioned molten material transition plate communicates with the second molten material semi-circular arc-shaped diversion channel 342 of the aforementioned transition plate. The guide sleeve feed plate 35 is located below the diversion plate 34 and is fixed to the upper end face of the inner guide sleeve 36, the middle guide sleeve 37 and the outer guide sleeve 38.On the guide sleeve feed plate 35, at the position corresponding to the aforementioned first molten material outlet hole 3411 of the diversion channel, a feed plate first molten material outlet hole 351 is formed, penetrating the thickness direction of the guide sleeve feed plate 35 and communicating with the diversion channel first molten material outlet hole 3411. At the position corresponding to the aforementioned second molten material outlet hole 3421 of the diversion channel, a pair of feed plate second molten material outlet holes 352 are formed, also penetrating the thickness direction of the guide sleeve feed plate 35, and in an isolated state corresponding to the outside of the feed plate first molten material outlet hole 351, communicating with the diversion channel second molten material outlet hole 3421. The concept of isolation here refers to the fact that the feed plate first and second molten material outlet holes 351 and 352 are separated, that is, they are not connected to each other. The inner guide sleeve 36 is housed within the intermediate guide sleeve cavity 372 of the intermediate guide sleeve 37. A pair of herringbone-shaped guide grooves 361, positioned opposite each other and recessed into the outer surface of the inner guide sleeve 36, are formed on the outer wall of the inner guide sleeve 36. Above the central position of the pair of herringbone-shaped guide grooves 361, a longitudinal feed groove 3611 for introducing melt into the herringbone-shaped guide grooves 361 is formed, communicating with the herringbone-shaped guide grooves 361. At the lower part of the cavity wall of the inner guide sleeve cavity 362 of the inner guide sleeve 36, and around the circumference of the cavity wall, a set of storage core scraping and cleaning ribs are formed at intervals, contacting (or "contacting") the outer wall of the aforementioned storage core 1. 3621, the intermediate guide sleeve 37 is accommodated within the outer guide sleeve cavity 382 of the outer guide sleeve 38. A pair of intermediate guide sleeve herringbone-shaped guide grooves 371 are formed on the outer wall of the intermediate guide sleeve 37, positioned opposite each other and recessed into the outer surface of the intermediate guide sleeve 37. Above the central position of the pair of intermediate guide sleeve herringbone-shaped guide grooves 371, a longitudinal feed groove 3711 for introducing melt into the intermediate guide sleeve herringbone-shaped guide grooves 371 is formed, communicating with the intermediate guide sleeve herringbone-shaped guide grooves 371. The aforementioned second molten material outlet hole 352 of the feed tray corresponds to and communicates with the longitudinal feed groove 3711 of the intermediate guide sleeve herringbone-shaped guide groove. The intermediate guide sleeve 37 has a longitudinal feed groove 3711 on its upper surface, corresponding to the central position of the herringbone-shaped guide groove. A melt passage notch 373 is provided at the position of the longitudinal feed groove 3711 of the herringbone-shaped guide channel of the inner guide sleeve. This melt passage notch 373 corresponds to the first molten material outlet hole 351 of the aforementioned feed tray and communicates with both the first molten material outlet hole 351 of the feed tray and the longitudinal feed groove 3611 of the herringbone-shaped guide channel of the inner guide sleeve. The outer guide sleeve 38 is housed within the storage cylinder cavity 22 of the storage cylinder 2. A set of inner wall scraping and cleaning ribs 381, which contact the cavity wall of the storage cylinder cavity 22, are formed at intervals on the lower part of the outer wall of the outer guide sleeve 38 and around its circumference. The lower end of the aforementioned intermediate guide sleeve 37 extends below the inner and outer guide sleeves 36 and 38, and the longitudinal cross-sectional shape of the lower end of the intermediate guide sleeve 37 is rhomboid.

[0024] Depend on Figure 1 As shown, a first screw extruder feed connector 216 is fitted on the storage cylinder cover 21 at a position corresponding to the first melt material inlet hole 211 of the storage cylinder cover, and a second screw extruder feed connector 217 is fitted on the storage cylinder cover 21 at a position corresponding to the second melt material inlet hole 212 of the storage cylinder cover. The aforementioned high molecular weight polyethylene, in molten state, is fed sequentially through the first screw extruder (not shown in the figure) to the first screw extruder feed joint 216, the first melt material inlet hole 211 of the storage cylinder cover, the first melt material inlet hole 321 of the pusher rod, the longitudinal center feed hole 3211 of the pusher rod, the first melt through hole 331 of the melt transition plate, the first melt semi-circular arc-shaped diversion groove 341 of the transition plate, the first melt outlet hole 3411 of the diversion groove, the melt passage notch 373, the first melt outlet hole 351 of the feed plate, the longitudinal feed groove 3611 of the herringbone-shaped guide groove of the inner guide sleeve, and the herringbone-shaped guide groove 361 of the inner guide sleeve, and then enters the storage chamber 221 of the storage cylinder (to be mentioned below) through the first melt flow channel 39a. Meanwhile, the aforementioned thermoplastic high-density polyethylene resin, in molten state, is sequentially fed through the second screw extruder (not shown in the figure) via the second screw extruder feed joint 217, the second melt feed inlet hole 212 in the storage cylinder cover, the second melt feed inlet hole 322 in the pusher rod, the longitudinal center feed hole 3221 in the pusher rod, the second melt through hole 332 in the melt transition plate, the second melt semi-circular arc-shaped diversion groove 342 in the transition plate, the second melt outlet hole 3421 in the diversion groove, the longitudinal feed groove 3711 of the herringbone-shaped guide groove in the intermediate guide sleeve, and the herringbone-shaped guide groove 371 in the intermediate guide sleeve, and then enters the storage chamber 221 of the storage cylinder through the second melt flow channel 39b mentioned below. As mentioned above, the melt used to form the molten billet in the storage chamber 221 of the storage cylinder is a homogeneous mixture of high molecular weight polyethylene melt and thermoplastic high-density polyethylene resin melt, providing raw material guarantee for the subsequent formation of the container, i.e., the molten billet of the IBC barrel. Figure 1 The image also shows a heating and insulation ring 23 (also called a "heating and insulation sleeve") installed outside the storage cylinder 2, and a discharge hole 24 opened at the upper end of the storage cylinder 2.

[0025] Please see Figure 5 , Figure 5 A pair of herringbone-shaped guide grooves 361 formed on the front outer wall of the inner guide sleeve 36, spaced 180° apart, are shown. Since the herringbone-shaped guide grooves 371 formed on the front and rear outer walls of the intermediate guide sleeve 37 are similar to the aforementioned pair of herringbone-shaped guide grooves 361, the applicant has not shown them in the unfolded form of the figure.

[0026] Regarding the function of the set of scraping and cleaning ribs 3621 for the storage core mentioned above, it acts like a washboard to remove the melt adhering to the outer wall of the storage core 1, and can especially avoid the situation of melt scaling caused by long-term shutdown; the cleaning function of the set of scraping and cleaning ribs 381 for the inner wall of the storage cylinder 2 is the same, and will not be described again.

[0027] Please pay attention. Figure 2 A material storage core through hole 311 is formed at the center of the aforementioned pusher rod lower fixing plate 31; a material storage core through hole 333 is formed at the center of the aforementioned molten material transition plate 33; a material storage core through hole 343 is formed at the center of the aforementioned diverter plate 34; a material storage core through hole 353 is formed at the center of the aforementioned guide sleeve feeding plate 35; and the upper end face of the aforementioned inner guide sleeve 36... The guide sleeve feed plate 35, the diverter plate 34, the molten material transition plate 33, and the pusher rod lower fixing plate 31 are stacked in sequence from bottom to top and are slidably sleeved on the outside of the aforementioned storage core 1. A storage core upper end fitting hole 214 is formed in the center of the storage cylinder cover 21 of the aforementioned storage cylinder 2. The upper end of the aforementioned storage core 1 protrudes upward through the storage core upper end fitting hole 214 and protrudes from the upper surface of the storage cylinder cover 21 and is locked by the storage core upper end locking nut 11.

[0028] In this embodiment, the diameters of the aforementioned pusher rod lower fixed plate storage core through hole 311, molten material transition plate storage core through hole 333, diverter plate storage core through hole 343, guide sleeve feed plate storage core through hole 353, and the inner guide sleeve cavity 362 of the aforementioned inner guide sleeve 36 are the same.

[0029] Depend on Figure 1 As shown, the gap formed between the outer wall of the aforementioned inner guide sleeve 36 and the inner wall of the aforementioned intermediate guide sleeve 37 constitutes the first molten material flow channel 39a mentioned above, while the gap formed between the outer wall of the aforementioned intermediate guide sleeve 37 and the inner wall of the aforementioned outer guide sleeve 38 constitutes the second molten material flow channel 39b mentioned above; the space at the lower part of the storage cylinder cavity 22 of the aforementioned storage cylinder 2 constitutes the storage cylinder storage cavity 221 mentioned above; a support plate threaded mating hole 2131 is opened on the aforementioned storage cylinder cover support platform 213 at a position corresponding to the storage cylinder cover 21, and a support plate 21311 is threadedly mated at a position corresponding to the support plate threaded mating hole 2131. The storage cylinder cover 21 is fixed to the support plate 21311 by spaced storage cylinder cover support fixing screws 215 around its perimeter.

[0030] See the key points Figure 2 as well as Figure 3On the aforementioned guide sleeve feed tray 35 and around its perimeter, there are arranged inner guide sleeve fixing screws 354a, middle guide sleeve fixing screws 354b, and outer guide sleeve fixing screws 354c. The middle guide sleeve fixing screw 354b is located outside the inner guide sleeve fixing screw 354a, and the outer guide sleeve fixing screw 354c is located outside the middle guide sleeve fixing screw 354b. On the upper surface of the aforementioned inner guide sleeve 36, there are inner guide sleeve fixing screw holes 36 corresponding to the aforementioned inner guide sleeve fixing screws 354a, spaced around its perimeter. 3. Intermediate guide sleeve fixing screw holes 374 corresponding to intermediate guide sleeve fixing screws 354b are provided at intervals around the aforementioned intermediate guide sleeve 37. Outer guide sleeve fixing screw holes 383 corresponding to outer guide sleeve fixing screws 354c are provided at intervals around the aforementioned outer guide sleeve 38. The aforementioned inner guide sleeve fixing screw 354a is fixed to the inner guide sleeve fixing screw hole 363, the aforementioned intermediate guide sleeve fixing screw 354b is fixed to the intermediate guide sleeve fixing screw hole 374, and the aforementioned outer guide sleeve fixing screw 354c is fixed to the outer guide sleeve fixing screw hole 383.

[0031] See Figure 2 as well as Figure 4On the aforementioned pusher rod lower fixing plate 31, and around its perimeter, are spaced-apart fixing screws 312 for the guide sleeve feed plate, 313 for the diverter plate, and 314 for the guide sleeve feed plate. The diverter plate fixing screw 313 is located outside the inner fixing screw 312 of the guide sleeve feed plate, while the outer fixing screw 314 is located outside the diverter plate fixing screw 313. On the aforementioned molten material transition plate 33, spaced-apart screws are provided around its perimeter, corresponding to the inner fixing screws of the guide sleeve feed plate. The molten material transition plate has a fixing screw through hole 334 corresponding to the fixing screw 312, a molten material transition plate middle screw through hole 335 corresponding to the aforementioned diversion plate fixing screw 313, and a molten material transition plate outer fixing screw through hole 336 corresponding to the aforementioned guide sleeve feed plate outer fixing screw 314. The diversion plate 34 has a diversion plate inner fixing screw through hole 344 corresponding to the aforementioned guide sleeve feed plate inner fixing screw 312, and a diversion plate fixing screw through hole 336 corresponding to the aforementioned diversion plate fixing screw 313, spaced apart around the diversion plate 34. The guide sleeve feed plate has a fixed screw hole 345 and a diverter plate external fixing screw through hole 346 corresponding to the aforementioned guide sleeve feed plate external fixing screw 314; the guide sleeve feed plate 35 has guide sleeve feed plate internal fixing screw holes 355 and guide sleeve feed plate external fixing screw holes 356 corresponding to the aforementioned guide sleeve feed plate internal fixing screw 312 and the aforementioned guide sleeve feed plate external fixing screw 314, respectively, and the aforementioned guide sleeve feed plate internal fixing screw 312 passes through the aforementioned molten material from top to bottom. After the fixing screw through holes 334 and 344 in the transition plate are screwed into the fixing screw hole 355 in the guide sleeve feed plate, the fixing screw 313 in the guide sleeve feed plate passes through the middle screw through hole 335 in the molten material transition plate from top to bottom and is screwed into the fixing screw hole 345 in the guide sleeve feed plate. The fixing screw 314 in the guide sleeve feed plate is screwed into the fixing screw through holes 336 and 346 in the molten material transition plate from top to bottom and is screwed into the fixing screw hole 356 in the guide sleeve feed plate.

[0032] See you later Figure 2On the aforementioned molten material transition plate 33, and around the circumference of the molten material transition plate 33, there are spaced-apart inner ring fixing screws 337a and outer ring fixing screws 337b. These inner ring fixing screws 337a and outer ring fixing screws 337b correspond to the inner ring fixing screws 337a and outer ring fixing screws 337b respectively on the aforementioned distribution plate 34. The screw holes and the outer ring fixing screw holes of the diverter plate are used for fixing; a pair of alignment pins 338 are also provided on the aforementioned molten material transition plate 33. The upper end of the alignment pin 338 protrudes from the upper surface of the molten material transition plate 33 and enters the alignment pin protrusion hole 315 opened on the aforementioned pusher rod lower fixing plate 31, while the lower end of the alignment pin 338 protrudes from the lower surface of the molten material transition plate 33 and enters the alignment pin lower protrusion hole 347 opened on the aforementioned diverter plate 34.

[0033] Please pay attention. Figure 1A mold sleeve mechanism 5 is connected to the lower part of the aforementioned storage cylinder 2. The mold sleeve mechanism 5 includes a mold sleeve base 51, an outer mold 52, an outer mold connecting plate 53, and a connecting pressure ring 54. The upper end of the mold sleeve base 51 is engaged with the lower end of the storage cylinder 2. A pressure ring fixing connecting flange 511 is formed on the outer wall of the lower end of the mold sleeve base 51 and around the circumference of the mold sleeve base 51. The connecting pressure ring 54 is located below the pressure ring fixing connecting flange 511 and is fixed by spaced connecting pressure rings. Screw 541 is fixed to the flange 511 of the pressure ring. The upper part of the outer mold 52 is fixed to the outer mold connecting plate 53 by the outer mold fixing screw 521. The bottom of the outer edge of the outer mold connecting plate 53 in the circumferential direction is supported on the bottom wall of the connecting pressure ring cavity of the connecting pressure ring 54. The lower end of the aforementioned storage core 1 extends into the mold sleeve cavity of the mold sleeve seat 51, and a central tie rod 12 is provided in the longitudinal central hole 13 of the storage core 1, which is movable up and down. The upper end of the central tie rod 12 Extending above the storage core 1 and passing through the aforementioned push rod drive mechanism 4, the central pull rod 12 extends upward and connects to the central pull rod lifting mechanism 6 above the push rod drive mechanism 4. The lower end of the central pull rod 12 extends out of the storage core 1 and is equipped with an inner mold mechanism 7. The inner mold mechanism 7 includes a guide sleeve 71 that rises and falls with the aforementioned central pull rod 12, an inner mold 72, and an inner mold limiting nut 73. The guide sleeve 71 is located above the inner mold 72 and is connected by spaced guide sleeve connecting screws. 711 is connected to the top of the inner mold 72. The inner mold limiting nut 73 is located in the inner mold cavity 721 of the inner mold 72 and is fixed to the lower end of the central pull rod 12 extending into the inner mold cavity 721. The gap between the outer wall of the guide sleeve 71 and the upper inner wall of the aforementioned outer mold 52 forms a melt transition channel 712 communicating with the aforementioned storage cylinder storage cavity 221. The gap between the outer wall of the inner mold 72 and the lower inner wall of the outer mold 52 forms a melt outlet channel 722.

[0034] Based on the above explanation and in combination Figure 1 It can be seen that the opening of the melt outlet channel 722 is opened when the inner die 72 moves downwards. Figure 1 (as shown at the bottom) and under the operation of the injection mechanism 3, the mixture in the storage cylinder cavity 221 at the bottom of the aforementioned storage cylinder cavity 22, which is a mixture of the aforementioned first melt material, i.e., high molecular weight polyethylene melt material and the second melt material, i.e. thermoplastic high density polyethylene resin melt material, is drawn out sequentially through the melt transition channel 712 and the melt outlet channel 722.

[0035] See you later Figure 1The aforementioned push rod drive mechanism 4 includes a push rod cylinder body 41, an upper cylinder cover 42, a lower cylinder cover 43, a push rod piston 44, and a central pull rod spacer 45. The upper cylinder cover 42 is fixed to the upper end of the push rod cylinder body 41, and the lower cylinder cover 43 is fixed to the lower end of the push rod cylinder body 41. The push rod piston 44 is disposed within the piston chamber 411 of the push rod cylinder body 41. The upper end of the pull rod spacer 45 extends above the push rod piston 44 and is fixed to the upper cylinder cover 42 of the push rod cylinder. The lower end of the central pull rod spacer 45 is supported on the lower cylinder cover 43 of the push rod cylinder. The upper and lower outer walls of the central pull rod spacer 45 are sealed to the upper cylinder cover 42 and the lower cylinder cover 43 of the push rod cylinder respectively through sealing rings. The central position of the aforementioned push rod piston 44 is connected to the central pull rod through the push rod piston sealing ring 441. The outer wall of the spacer 45 forms a sliding, sealed fit; the upper end of the aforementioned set of push rods 32 passes through the push rod lower cylinder cover push rod hole 431 on the aforementioned push rod lower cylinder cover 43 and enters the piston chamber 411 of the aforementioned push rod cylinder body and is fixed to the downward-facing side of the push rod piston 44, wherein a push rod lower cylinder cover push rod hole sealing ring 4311 is provided on the hole wall of the push rod lower cylinder cover push rod hole 431 to seal with the push rod 32; the aforementioned center The upper end of the pull rod 12 passes sequentially from bottom to top through the center pull rod hole 432 of the lower cylinder cover 43 and the center pull rod spacer hole 451 of the center pull rod spacer 45, and then connects upward to the aforementioned center pull rod lifting mechanism 6; wherein, a support plate 46 is fixed by a support plate fixing screw at a position corresponding to the lower cylinder cover 43 of the aforementioned push rod, and a support member 47 is provided between the support plate 46 and the opposite side of the aforementioned storage cylinder cover 21.

[0036] Since the ejector piston 44 of the ejector drive mechanism 4 causes a set of ejector rods 32 to work (lift and lower), and the lifting and lowering action of the set of ejector rods 32 causes the aforementioned ejector rod lower fixed plate 31, molten material transition plate 33, flow distribution plate 34, guide sleeve guide plate 35, inner guide sleeve 36, intermediate guide sleeve 37 and outer guide sleeve 38 to move accordingly to achieve the injection mechanism, it is similar to CN106003665B (double-layer guide storage die head device for blow molding machine), so the applicant will not elaborate further.

[0037] Still see Figure 1The aforementioned central tie rod lifting mechanism 6 includes a tie rod cylinder body 61, a tie rod cylinder upper cover 62, a tie rod lifting piston 63, a tie rod lifting piston stroke adjusting sleeve 64, and an adjusting sleeve locking nut 65. The tie rod cylinder upper cover 62 is fixed to the upper end of the tie rod cylinder body 61, while the lower end of the tie rod cylinder body 61 is supported on the aforementioned push rod cylinder upper cover 42, which also serves as the lower cylinder cover of the tie rod cylinder. Furthermore, the inner wall of the upper end of the tie rod cylinder body 61 and... The lower inner wall of each cylinder is sealed to the upper cylinder cover 62 of the pull rod actuation cylinder and the upper cylinder cover 42 of the push rod cylinder respectively through the cylinder body sealing ring 611. The pull rod lifting piston 63 is located in the piston cavity 612 of the pull rod actuation cylinder body 61, and the pull rod lifting piston 63 is sealed to the cavity wall of the piston cavity 612 of the pull rod actuation cylinder body through the pull rod lifting piston sealing ring 631. The middle part of the pull rod lifting piston 63 on the downward side extends downward. A lower fitting end 632 of a lifting piston is provided, which slides up and down and is sealed in fit with the center hole 421 of the upper cylinder cover of the push rod cylinder 42. An upper fitting end 633 of a lifting piston extends upward from the middle of the upward-facing side of the lifting piston 63. This upper fitting end 633 slides up and down and is sealed in fit with the center hole 621 of the upper cylinder cover of the pull rod cylinder 62. The upper end of the aforementioned central pull rod 12 passes through from bottom to top. The center hole 634 of the lever lifting piston 63 extends above the cylinder cover 62 of the aforementioned lever actuating cylinder. The lever lifting piston stroke adjusting sleeve 64 is fixed to the upper end of the central lever 12 at a position above the cylinder cover 62 of the lever actuating cylinder, and is connected to the mating end 633 of the aforementioned lifting piston by a piston connecting screw 641. The adjusting sleeve locking nut 65 is threadedly engaged with the central lever 12 at a position above the lever lifting piston stroke adjusting sleeve 64.

[0038] After the material is stored in the storage cylinder cavity 22, i.e., after the material is stored in the storage cylinder cavity 221, the cylinder body 61 of the pull rod lifting mechanism 6 (i.e., the push rod cylinder) works. Oil enters the upper part of the pull rod lifting piston 63, i.e., the upper chamber of the piston cavity 612 of the pull rod cylinder body. The oil pressure forces the pull rod lifting piston 63 to move downward, driving the central pull rod 12 downward. The central pull rod 12 drives the guide sleeve 71 fixedly connected to its lower end and the inner mold 72 (also called "inner mold" or "mold core") connected to the guide sleeve 71 to move downward, opening the melt outlet channel 722. At the same time, under the operation of the aforementioned push rod driving mechanism 4 driving the injection mechanism 3, the material in the storage cylinder cavity 221, which is used to form a molten billet, is sequentially guided through the melt transition channel 712 and the opening (bottom) of the melt outlet channel 722 to the mold located below it. Under the reverse operation of the central pull rod lifting mechanism 6, oil enters the lower part of the pull rod lifting piston 63, i.e., the lower chamber of the piston cavity 612 of the pull rod cylinder (the aforementioned upper chamber returns oil). The oil pressure forces the pull rod lifting piston 63 to move upward until the outer wall of the aforementioned inner mold 72 contacts the inner wall of the outer mold 52, temporarily closing the outlet of the melt outlet channel 722. At the same time, the aforementioned push rod drive mechanism 4 drives the injection mechanism 3 to move in the reverse direction (i.e., upward), preparing for the next injection. Since the next injection, i.e., the process of providing the next molten billet for forming the IBC barrel, is the same as described above, the applicant will not repeat it. It should be noted that the material (molten mixture) stored in the storage cylinder storage chamber 221 can meet the requirements for providing multiple molten billets.

[0039] In summary, the technical solution provided by this invention makes up for the shortcomings of the prior art, successfully completes the invention task, and accurately realizes the technical effects described by the applicant in the above technical effects column.

Claims

1. A double-layer guide-flow storage die head structure for a blow molding machine, comprising a storage core (1), a storage cylinder (2), and an injection mechanism (3), wherein the storage cylinder (2) is located outside the storage core (1), and a storage cylinder cover (21) is provided at the upper end of the storage cylinder (2), the storage cylinder cover (21) is supported on a storage cylinder cover support platform (213), and a first melt material inlet hole (211) and a second melt material inlet hole (212) are provided on the storage cylinder cover (21) and around the circumference of the storage cylinder cover (21) at intervals of 180°, characterized in that: The injection mechanism (3) includes a lower fixing plate (31) for the pusher rod, a set of pusher rods (32), a molten material transition plate (33), a diversion plate (34), a guide sleeve feeding plate (35), an inner guide sleeve (36), a middle guide sleeve (37), and an outer guide sleeve (38). The set of pusher rods (32) are distributed circumferentially and their upper ends are connected to the pusher rod drive mechanism (4), while their lower ends are fixed to the lower fixing plate (31) after passing through the storage cylinder cover (21). A pusher rod is provided on one of the pusher rods (32) corresponding to the first molten material inlet hole (211) of the storage cylinder cover, and at a position corresponding to the first molten material inlet hole (211) of the storage cylinder cover. The push rod has a first melt material inlet hole (321), which communicates with the first melt through hole (331) of the molten material transition plate (33) on the molten material transition plate (33) and through the thickness direction of the molten material transition plate (33) through the first melt material inlet hole (3211) of the push rod longitudinal center. On one of the push rods (32) corresponding to the second melt material inlet hole (212) of the storage cylinder cover, a second melt material inlet hole (322) of the push rod is opened at a position corresponding to the second melt material inlet hole (212) of the storage cylinder cover. The second melt material inlet hole (322) of the push rod is guided through the second melt material inlet hole of the push rod longitudinal center. The hole (3221) communicates with the second melt through hole (332) of the molten material transition plate (33), which is opened on the molten material transition plate (33) and also penetrates the thickness direction of the molten material transition plate (33). The molten material transition plate (33) is located below the lower fixed plate (31) of the pusher rod. The diversion plate (34) is located below the molten material transition plate (33). A first molten material semi-circular arc-shaped diversion groove (341) and a second molten material semi-circular arc-shaped diversion groove (342) are opened on the upward side of the molten material transition plate (33). The two ends of the first molten material semi-circular arc-shaped diversion groove (341) of the transition plate each form a first molten material outlet hole (3411). Each end of the arc-shaped flow divider (342) is provided with a second molten material outlet hole (3421). The first molten material outlet hole (3411) and the second molten material outlet hole (3421) of the flow divider penetrate the thickness direction of the flow divider plate (34). The first melt through hole (331) of the molten material transition plate communicates with the first molten material semi-circular arc-shaped flow divider (341) of the transition plate, and the second melt through hole (332) of the molten material transition plate communicates with the second molten material semi-circular arc-shaped flow divider (342) of the transition plate. The guide sleeve feed plate (35) is located below the flow divider plate (34) and is fixed to the upper end face of the inner guide sleeve (36), the middle guide sleeve (37) and the outer guide sleeve (38).On the guide sleeve feed plate (35), a feed plate first molten material outlet hole (351) is provided at the position corresponding to the first molten material outlet hole (3411) of the diversion channel, penetrating the thickness direction of the guide sleeve feed plate (35) and communicating with the first molten material outlet hole (3411) of the diversion channel. At the position corresponding to the second molten material outlet hole (3421) of the diversion channel, a pair of feed plate second molten material outlet holes (352) are provided, also penetrating the thickness direction of the guide sleeve feed plate (35) and in an isolated state corresponding to the outer side of the feed plate first molten material outlet hole (351) and communicating with the second molten material outlet hole (3421) of the diversion channel. The inner guide sleeve (3) 6) The intermediate guide sleeve cavity (372) of the intermediate guide sleeve (37) is accommodated. On the outer wall of the inner guide sleeve (36), a pair of inner guide sleeve herringbone-shaped guide grooves (361) are formed, which are positioned opposite each other and recessed into the outer surface of the inner guide sleeve (36). Above the central position of the pair of inner guide sleeve herringbone-shaped guide grooves (361), a longitudinal feed groove (3611) for introducing the melt into the inner guide sleeve herringbone-shaped guide grooves (361) is formed, which communicates with the inner guide sleeve herringbone-shaped guide grooves (361). At the lower part of the cavity wall of the inner guide sleeve cavity (362) of the inner guide sleeve (36) and around the circumference of the cavity wall of the inner guide sleeve cavity, the two grooves are spaced apart. The configuration includes a set of material core scraping and cleaning ribs (3621) that are in contact with the outer wall of the material core (1). The intermediate guide sleeve (37) is housed within the outer guide sleeve cavity (382) of the outer guide sleeve (38). A pair of intermediate guide sleeve herringbone-shaped guide grooves (371) are formed on the outer wall of the intermediate guide sleeve (37), which are positioned opposite each other and recessed into the outer surface of the intermediate guide sleeve (37). Above the central position of the pair of intermediate guide sleeve herringbone-shaped guide grooves (371) is formed a longitudinal feed groove (37) for introducing the melt into the intermediate guide sleeve herringbone-shaped guide grooves (371), which communicates with the intermediate guide sleeve herringbone-shaped guide grooves (371). 11) The second molten material outlet hole (352) of the feed plate corresponds to and communicates with the longitudinal feed groove (3711) of the herringbone guide groove of the intermediate guide sleeve. A melt passage notch (373) is provided on the upper surface of the intermediate guide sleeve (37) at a position corresponding to the longitudinal feed groove (3711) of the herringbone guide groove of the intermediate guide sleeve. This melt passage notch (373) corresponds to the first molten material outlet hole (351) of the feed plate and communicates with both the first molten material outlet hole (351) of the feed plate and the longitudinal feed groove (3611) of the herringbone guide groove of the inner guide sleeve. The outer guide sleeve (38) is housed within the storage cylinder cavity (22) of the storage cylinder (2).A set of scraping and cleaning ribs (381) for the inner wall of the storage cylinder (22) are formed at intervals on the lower part of the outer wall of the outer guide sleeve (38) and around the circumference of the outer guide sleeve (38), which are in contact with the cavity wall of the storage cylinder (22); the lower end of the intermediate guide sleeve (37) extends below the inner and outer guide sleeves (36, 38), and the longitudinal section shape of the lower end of the intermediate guide sleeve (37) is rhomboid.

2. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 1, characterized in that: A material storage core passage hole (311) is formed at the center of the lower fixed plate (31) of the pusher rod; a material storage core passage hole (333) is formed at the center of the molten material transition plate (33); a material storage core passage hole (343) is formed at the center of the diverter plate (34); a material storage core passage hole (353) is formed at the center of the guide sleeve feed plate (35); the upper end face of the inner guide sleeve (36) and the guide sleeve... The feeding plate (35), the diversion plate (34), the molten material transition plate (33), and the lower fixing plate (31) of the push rod are stacked in sequence from bottom to top and are slidably fitted around the storage core (1). A storage core upper end fitting hole (214) is formed in the center of the storage cylinder cover (21) of the storage cylinder (2). The upper end of the storage core (1) passes through the storage core upper end fitting hole (214) and protrudes from the upper surface of the storage cylinder cover (21) and is locked by the storage core upper end locking nut (11).

3. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 2, characterized in that: The diameters of the material storage core through hole (311) of the fixed plate under the pusher rod, the material storage core through hole (333) of the molten material transition plate, the material storage core through hole (343) of the diverter plate, the material storage core through hole (353) of the guide sleeve, and the inner guide sleeve cavity (362) of the inner guide sleeve (36) are the same.

4. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 1, characterized in that: The gap formed between the outer wall of the inner guide sleeve (36) and the inner wall of the intermediate guide sleeve (37) constitutes the first molten material flow channel (39a), while the gap formed between the outer wall of the intermediate guide sleeve (37) and the inner wall of the outer guide sleeve (38) constitutes the second molten material flow channel (39b); the space at the lower part of the storage cylinder cavity (22) of the storage cylinder (2) constitutes the storage cylinder storage cavity (221); a support plate threaded mating hole (2131) is opened on the storage cylinder cover support platform (213) and at the position corresponding to the storage cylinder cover (21), a support plate (21311) is threadedly mated at the position corresponding to the support plate threaded mating hole (2131), and the storage cylinder cover (21) is fixed to the support plate (21311) around its perimeter by spaced storage cylinder cover support fixing screws (215).

5. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 1 or 2, characterized in that: An inner guide sleeve fixing screw (354a), a middle guide sleeve fixing screw (354b), and an outer guide sleeve fixing screw (354c) are provided at intervals around the guide sleeve feed plate (35). The middle guide sleeve fixing screw (354b) is located outside the inner guide sleeve fixing screw (354a), and the outer guide sleeve fixing screw (354c) is located outside the middle guide sleeve fixing screw (354b). On the upper surface of the inner guide sleeve (36), inner guide sleeve fixing screw holes (36) corresponding to the inner guide sleeve fixing screw (354a) are provided at intervals around the inner guide sleeve (36). 3) Intermediate guide sleeve fixing screw holes (374) corresponding to the intermediate guide sleeve fixing screw (354b) are provided at intervals around the intermediate guide sleeve (37). Outer guide sleeve fixing screw holes (383) corresponding to the outer guide sleeve fixing screw (354c) are provided at intervals around the outer guide sleeve (38). The inner guide sleeve fixing screw (354a) is fixed with the inner guide sleeve fixing screw hole (363). The intermediate guide sleeve fixing screw (354b) is fixed with the intermediate guide sleeve fixing screw hole (374). The outer guide sleeve fixing screw (354c) is fixed with the outer guide sleeve fixing screw hole (383).

6. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 1 or 2, characterized in that: On the lower fixing plate (31) of the pusher rod, and around the perimeter of the lower fixing plate (31) of the pusher rod, there are spaced-apart fixing screws (312) for the inner fixing plate of the guide sleeve feed plate, fixing screws (313) for the diverting plate, and fixing screws (314) for the outer fixing plate of the guide sleeve feed plate. The fixing screws (313) for the diverting plate are located outside the fixing screws (312) for the inner fixing plate of the guide sleeve feed plate, and the fixing screws (314) for the outer fixing plate of the guide sleeve feed plate are located outside the fixing screws (313) for the diverting plate. On the molten material transition plate (33), around the perimeter of the molten material transition plate (33), there are spaced-apart fixing screws (312) for the guide sleeve feed plate. The molten material transition plate has an internal fixing screw through hole (334) corresponding to the internal fixing screw (312), a molten material transition plate middle screw through hole (335) corresponding to the diverter plate fixing screw (313), and a molten material transition plate outer fixing screw through hole (336) corresponding to the guide sleeve feed plate outer fixing screw (314). The diverter plate (34) has internal fixing screw through holes (344) corresponding to the guide sleeve feed plate internal fixing screw (312) and diverter plates (313) corresponding to the diverter plate fixing screw (313) spaced apart around its perimeter. The guide sleeve feed plate has a fixed screw hole (345) and a diverter plate external fixing screw through hole (346) corresponding to the external fixing screw (314) of the guide sleeve feed plate; the guide sleeve feed plate (35) has internal fixing screw holes (355) corresponding to the internal fixing screw (312) of the guide sleeve feed plate and external fixing screw holes (356) corresponding to the external fixing screw (314) of the guide sleeve feed plate, and the internal fixing screw (312) of the guide sleeve feed plate passes through the melt from top to bottom. After the material transfer plate is fixed in the through hole (334) and the distribution plate is fixed in the through hole (344), it is screwed into the fixing screw hole (355) of the guide sleeve feed plate. The distribution plate fixing screw (313) passes through the middle screw through hole (335) of the molten material transfer plate from top to bottom and is screwed into the distribution plate fixing screw hole (345). The guide sleeve feed plate external fixing screw (314) is screwed into the molten material transfer plate external fixing screw through hole (336) and the distribution plate external fixing screw through hole (346) from top to bottom and then screwed into the guide sleeve feed plate external fixing screw hole (356).

7. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 6, characterized in that: On the molten material transfer plate (33) and around its circumference, there are spaced-apart inner ring fixing screws (337a) and outer ring fixing screws (337b). These inner ring fixing screws (337a) and outer ring fixing screws (337b) correspond to the inner ring fixing screw holes on the transfer plate (34) that are respectively located on the transfer plate (34) and correspond to the inner ring fixing screws (337a) and outer ring fixing screws (337b). The outer ring of the distribution plate is fixed with screw holes; a pair of alignment pins (338) are also provided on the molten material transition plate (33). The upper end of the alignment pin (338) protrudes from the upper surface of the molten material transition plate (33) and enters the alignment pin protrusion hole (315) opened on the lower fixing plate (31) of the pusher rod, while the lower end of the alignment pin (338) protrudes from the lower surface of the molten material transition plate (33) and enters the alignment pin lower protrusion hole (347) opened on the distribution plate (34).

8. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 4, characterized in that: A mold sleeve mechanism (5) is connected to the lower part of the storage cylinder (2). The mold sleeve mechanism (5) includes a mold sleeve base (51), an outer mold (52), an outer mold connecting plate (53), and a connecting pressure ring (54). The upper end of the mold sleeve base (51) is engaged with the lower end of the storage cylinder (2). A pressure ring fixing connecting flange (511) is formed on the outer wall of the lower end of the mold sleeve base (51) and around the circumference of the mold sleeve base (51). The connecting pressure ring (54) is located below the pressure ring fixing connecting flange (511) and is fixed by spaced connecting pressure ring fixing screws. The nail (541) is fixed to the flange (511) of the pressure ring. The upper part of the outer mold (52) is fixed to the outer mold connecting plate (53) by the outer mold fixing screw (521). The bottom of the outer edge of the outer mold connecting plate (53) in the circumferential direction is supported on the bottom wall of the connecting pressure ring cavity of the connecting pressure ring (54). The lower end of the storage core (1) extends into the mold sleeve cavity of the mold sleeve seat (51), and a central tie rod (12) is provided in the longitudinal central hole (13) of the storage core (1) to move up and down. The upper end of the central tie rod (12) extends into the mold sleeve cavity of the mold sleeve seat (51). The material is extended above the storage core (1) and passes through the push rod drive mechanism (4), then extends upward to connect with the central pull rod lifting mechanism (6) above the push rod drive mechanism (4). The lower end of the central pull rod (12) extends out of the storage core (1) and is equipped with an inner mold mechanism (7). The inner mold mechanism (7) includes a guide sleeve (71) that moves up and down with the central pull rod (12), an inner mold (72), and an inner mold limiting nut (73). The guide sleeve (71) is located above the inner mold (72) and is connected by spaced guide sleeve connecting screws. 711) is connected to the top of the inner mold (72), the inner mold limiting nut (73) is located in the inner mold cavity (721) of the inner mold (72) and is fixed to the lower end of the central pull rod (12) extending into the inner mold cavity (721). The gap between the outer wall of the guide sleeve (71) and the upper inner wall of the outer mold (52) forms a melt transition channel (712) communicating with the storage cavity (221) of the storage cylinder, while the gap between the outer wall of the inner mold (72) and the lower inner wall of the outer mold (52) forms a melt outlet channel (722).

9. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 8, characterized in that: The push rod drive mechanism (4) includes a push rod cylinder body (41), an upper cylinder cover (42), a lower cylinder cover (43), a push rod piston (44), and a central pull rod spacer (45). The upper cylinder cover (42) is fixed to the upper end of the push rod cylinder body (41), and the lower cylinder cover (43) is fixed to the lower end of the push rod cylinder body (41). The push rod piston (44) is located in the piston chamber (411) of the push rod cylinder body (41). Inside, the upper end of the central tie rod spacer (45) extends above the push rod piston (44) and is fixed to the upper cylinder cover (42) of the push rod cylinder, while the lower end of the central tie rod spacer (45) is supported on the lower cylinder cover (43) of the push rod. The upper and lower outer walls of the central tie rod spacer (45) are sealed to the upper cylinder cover (42) and the lower cylinder cover (43) of the push rod cylinder respectively through sealing rings. The central position of the push rod piston (44) is connected to the center through the push rod piston sealing ring (441). The outer wall of the pull rod spacer (45) forms a sliding sealing fit; the upper end of the set of push rods (32) passes through the push rod lower cylinder cover push rod hole (431) on the push rod lower cylinder cover (43) and enters the piston chamber (411) of the push rod cylinder body and is fixed to the side of the push rod piston (44) facing downward, wherein a push rod lower cylinder cover push rod hole sealing ring (4311) is provided on the hole wall of the push rod lower cylinder cover push rod hole (431) to seal with the push rod (32); the central pull The upper end of the rod (12) passes through the center pull rod hole (432) of the lower cylinder cover (43) and the center pull rod spacer hole (451) of the center pull rod spacer (45) in sequence from bottom to top, and then connects to the center pull rod lifting mechanism (6) from top to bottom; wherein, a support plate (46) is fixed by a support plate fixing screw at the position corresponding to the lower cylinder cover (43) of the push rod, and a support member (47) is provided between the support plate (46) and the opposite side of the storage cylinder cover (21).

10. The double-layer flow-guiding and material-storing die head structure of the blow molding machine according to claim 9, characterized in that: The central pull rod lifting mechanism (6) includes a pull rod cylinder body (61), a pull rod cylinder upper cover (62), a pull rod lifting piston (63), a pull rod lifting piston stroke adjusting sleeve (64), and an adjusting sleeve locking nut (65). The pull rod cylinder upper cover (62) is fixed to the upper end of the pull rod cylinder body (61), while the lower end of the pull rod cylinder body (61) is supported on the upper cover (42) of the push rod cylinder, which also serves as the lower cover of the pull rod cylinder. The upper inner wall of the pull rod cylinder body (61) and the upper inner wall of the pull rod cylinder body (61) are also supported on the upper cover (42) of the push rod cylinder. The lower inner wall of each cylinder is sealed to the upper cylinder cover (62) of the pull rod actuation cylinder and the upper cylinder cover (42) of the push rod cylinder respectively through the cylinder body sealing ring (611). The pull rod lifting piston (63) is set in the piston chamber (612) of the pull rod actuation cylinder body (61), and the pull rod lifting piston (63) is sealed to the cavity wall of the piston chamber (612) of the pull rod actuation cylinder body through the pull rod lifting piston sealing ring (631). The pull rod lifting piston (63) extends downward from the middle of the downward side. A lower fitting end (632) of a lifting piston is provided. This lower fitting end (632) of the lifting piston is in a sliding state and is sealed with the center hole (421) of the upper cylinder cover of the push rod cylinder (42). An upper fitting end (633) of the lifting piston (63) extends upward from the middle of the side facing upward. This upper fitting end (633) of the lifting piston is in a sliding state and is sealed with the center hole (621) of the upper cylinder cover of the pull rod cylinder (62). The upper end of the central pull rod (12) passes through the pull rod from bottom to top. The center hole (634) of the lever lifting piston (63) extends above the cylinder cover (62) of the lever actuating cylinder. The lever lifting piston stroke adjusting sleeve (64) is fixed to the upper end of the center lever (12) at a position above the cylinder cover (62) of the lever actuating cylinder, and is connected to the upper mating end (633) of the lifting piston by a piston connecting screw (641). The adjusting sleeve locking nut (65) is threadedly engaged with the center lever (12) at a position above the lever lifting piston stroke adjusting sleeve (64).

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