CN217495138U - Die head inner core of hollow blow molding machine storage die head and combined type multilayer storage die head - Google Patents
Die head inner core of hollow blow molding machine storage die head and combined type multilayer storage die head Download PDFInfo
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- CN217495138U CN217495138U CN202220723015.0U CN202220723015U CN217495138U CN 217495138 U CN217495138 U CN 217495138U CN 202220723015 U CN202220723015 U CN 202220723015U CN 217495138 U CN217495138 U CN 217495138U
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Abstract
The utility model relates to a die head inner core and combination formula storage die head of cavity blowing machine storage die head belongs to cavity blowing machine storage die head technical field. Die head inner core upper segment and middle ring contact's straight section wholly adopt spiral runner to there is the clearance between spiral runner's runner wall highest point and the middle ring inner wall, make spiral runner with the passageway that forms between the middle ring along the inner wall axial of middle ring communicates. The combined type multilayer storage die head is characterized in that a plurality of intermediate rings are concentrically nested on the basis of the original intermediate rings, a flow channel is arranged on the outer wall of each intermediate ring to form a plurality of mutually independent channels, the flow channel of each intermediate ring adopts a multi-inlet spiral flow channel structure and a grading flow channel to form a combined type flow channel, the grading flow channel adopts a step-by-step branching structure, and a plurality of openings are formed at the tail end of the multi-stage mixed type flow channel and are communicated with the multi-inlet spiral flow channel.
Description
Technical Field
The utility model relates to a die head inner core and combination formula multilayer storage die head of cavity blowing machine storage die head belongs to cavity blowing machine storage die head technical field. Particularly, the utility model relates to a combination formula multilayer storage die head that cavity blowing machine storage die head inner core and have combination formula runner.
Background
Hollow blow molding, also known as blow molding, is a method of forming a hollow article by blowing a plastic hot-melt-shaped parison closed in a mold by means of gas pressure, and is the most commonly used plastic processing method. The blow molding is a process in which a tubular thermoplastic plastic parison extruded from an extruder and still in a softened state is placed in a mold, compressed air is introduced, the parison is deformed along the cavity by the pressure of the air, and the parison is cooled and released from the mold to form various hollow articles.
The blow molding machine generally includes: the device comprises an extrusion device (a screw extruder), a machine head, a die opening and closing mechanism, a lifting mechanism, a blowing device, a cooling device, a safety protection device, an electric control system, a hydraulic and pneumatic control system and is matched with a manipulator and the like to operate. The large and heavy hollow blow molding machine is generally suitable for producing large hollow products such as plastic packaging barrels, tool cases, automobile special-shaped hollow parts, hollow seats, automobile oil tanks, trays, table panels, outdoor leisure articles, teaching toys, road traffic facilities and the like; in order to manufacture the large-sized products, both of the magazine type and the continuous type are generally used for the head of the blow molding machine.
The storage device of the storage type die head of the existing hollow blow molding machine generally comprises a storage cylinder, a die head inner core, an intermediate ring, a material injection piston and other main components. When the plastic material injection mold is used, molten plastic material enters the material storage cylinder through a flow passage between the die head inner core and the middle ring, is extruded and molded through the material injection piston, and is cooled and demoulded to form a plastic product with a certain shape.
The existing magazine die, such as the hollow blow molding magazine die described in patent CN215040099U, has the following problems: firstly, the flow channel of the clothes hanger type structure on the inner core of the die head is complex to process, so that the cost of the die head is higher; secondly, a flow channel between the die head inner core and the intermediate ring has the problems of line convergence and slow color change, so that the processing time is longer, and the production cost of plastic products is higher; wherein, the joint line means that the plastic product finally formed has a joint line because: the conventional clothes hanger type structure runner has a fork, two or more runners can be formed, so that the feeding material of the die head dispersedly flows in the runners and finally is converged in the storage cylinder, and a converging line exists in a finished product; color changing refers to washing materials in a die head; because different plastic products have different requirements on the color of the material, when a new product is produced, the material left in the die head needs to be washed; however, the conventional die head core structure is a flow channel of a coat hanger type structure, and has a plurality of dead corners, so that a long time is required for washing materials, and the die head is slow in color changing.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing at present, the application improves the hollow blow molding storage die head in the patent CN215040099U, and provides a die head inner core for a single-layer storage die head of a hollow blow molding machine and a combined multi-layer storage die head; the technical scheme is as follows:
the application firstly provides a single-layer stock die head of a hollow blow molding machine, in particular provides a die head inner core of the hollow blow molding stock die head of patent CN215040099U, and a flow channel between the die head inner core and an intermediate ring adopts an integral spiral flow channel.
Storage core among patent CN215040099U, the die head inner core promptly, as shown in figure 7, the die head inner core divide into two sections about and adopts the sectional type processing to connect, upper segment storage core is hollow screw, and storage piston is passed and through lock nut and control plug fixed connection to the upper end of upper segment storage core, is provided with the runner on the upper segment storage core, forms the feed liquid passageway between runner and the intermediate ring.
For example, in the hollow blow molding machine stock type die head of patent CN215040099U, the important function of the flow channel between the stock core and the intermediate ring in the die head is to make the molten material flow with small pressure loss; also, the runner exceeding the necessary size may cause adverse effects such as an increase in scrap, a deterioration in material cost, an extension in molding cycle, an increase in waste, and the like.
One of the indexes expressing the flow channel efficiency is an inscribed circle area of the cross-sectional shape, and the larger the inscribed circle area is, the larger the area of the molten material flowing is, and the smoother the flow of the molten material is. The most desirable cross-sectional shape of the flow channel is circular, but since the movable side and the fixed side must be engraved with the flow channel at the same time, the die processing cost is increased, and a trapezoidal section or a section obtained by further cutting a half circle is generally used.
According to the technical scheme of the application, the upper section of the inner core of the die head is in contact with the straight section of the middle ring, and the whole die head adopts a spiral flow channel; the spiral flow channel is distributed on the hollow screw rod at the upper section of the die head inner core, and an opening corresponding to the feeding hole of the material storage cylinder cover is formed at the initial section of the spiral flow channel.
According to the technical scheme, the cross section of the spiral flow channel at the upper section of the die head inner core is in a trapezoid shape or an approximately trapezoid shape, the interior of the flow channel is further processed to form smooth transition, and the maximum inscribed circle area of the section of the flow channel is ensured while the flow channel is ensured not to exceed the necessary size.
According to the technical scheme of the application, relative to the width of the trapezoidal opening in the spiral flow channel, the width of the spiral flow channel is more than or equal to 5 mm; the depth of the flow channel is more than or equal to 5 mm; more specifically, the minimum width of the trapezoidal opening of the spiral flow channel is more than or equal to 5 mm.
According to the technical scheme, a gap exists between the highest position of the runner wall of the spiral runner at the upper section of the die head inner core and the inner wall of the middle ring, so that a channel formed between the spiral runner and the middle ring is axially communicated along the inner wall of the middle ring.
According to the technical scheme, the clearance between the highest position of the runner wall of the spiral runner at the upper section of the die head inner core and the inner wall of the middle ring is within 8mm (less than or equal to 8 mm).
According to the technical scheme, the distance is kept between the highest position of the flow channel wall of the spiral flow channel and the middle ring, so that materials entering the flow channel mainly flow in the spiral flow channel, downward flow with high flow speed is formed between the flow channel wall and the inner wall of the middle ring, the two flows are mixed to form composite flow between the middle ring and the flow channel wall, high momentum is brought, the materials flowing in the spiral flow channel are sheared, the materials are diluted, and the color changing speed and efficiency are greatly improved.
According to the technical scheme, the spiral flow channel at the upper section of the inner core of the die head can be arranged at an angle on the side surface of the flow channel during processing, so that the die is easier to demould. In addition, the inner surface of the spiral flow passage is polished to be smooth by adopting a rubber grindstone or wrapping cloth and the like so as to prevent pressure loss and cause slow color change of the core material of the die head.
The overall structure of the hollow blow molding machine magazine die for which the die core of the present application is used is described in detail in patent CN 215040099U. According to the description of the patent, the hollow blow molding storage type die head comprises a servo oil cylinder, a material injection device, a material storage device and a control core rod which is longitudinally arranged; the material injection device is positioned below the servo oil cylinder and comprises a material injection cylinder upper cover, a material injection cylinder barrel, a material injection cylinder lower cover and a material injection piston; the material storage device is positioned below the material injection device and comprises a material storage cylinder barrel, a material storage piston, a material storage core, a middle ring and a material storage cylinder cover; the material storage core is divided into an upper section and a lower section, the upper end of the upper section of the material storage core penetrates through the material storage piston and is fixedly connected with the control core rod through a locking nut, a flow passage is arranged between the material storage core at the upper section and the middle ring, and a sliding sleeve and a mold core are arranged in the lower section of the material storage core; and feed inlets are formed in two sides of the storage cylinder cover.
The hollow blow molding machine storage die head applied by the die head inner core can adopt a storage die head which has the same overall structure as the storage die head of the patent, and the storage core is replaced by the die head inner core of the application.
According to the technical scheme of the application, the die core of the application can also be applied to a structure similar to the storage die head of the patent, or a die head structure which is partially improved on the storage die head.
According to the technical scheme, the die head inner core can be suitable for all hollow blow molding machine storage and continuous extrusion die heads.
The application still provides combination formula multilayer storage die head of cavity blowing machine, combination formula multilayer storage die head is at a plurality of outer intermediate rings of concentric nestification on the basis of original intermediate ring to set up the runner on the outer wall of every outer intermediate ring, form a plurality of mutually independent passageways, and every passageway sets up the feed inlet respectively, make mutual noninterference between every passageway.
According to the technical scheme of the application, the flow channel of each intermediate ring of the combined multilayer storage die head of the hollow blow molding machine can form a combined flow channel by adopting a grading flow channel and a multi-inlet spiral flow channel structure, as shown in attached figures 3 and 4; wherein, the grading flow channel adopts a step-by-step bifurcation structure, and starts from the starting ends at two sides of the outer wall of the middle ring by 2 n The multiplying power of the multi-stage mixed type runner is gradually branched to form a multi-stage mixed type runner, a plurality of openings are formed at the tail end of the multi-stage mixed type runner and communicated with the multi-inlet spiral type runner, materials entering from the feeding hole firstly enter the multi-stage mixed runner, then enter the multi-inlet spiral type runner from the plurality of openings of the multi-stage mixed runner and enter the compression section at the tail end of the spiral type runner, finally flow out from the bottom of the middle ring, and are converged and enter the storage cylinder.
According to the technical scheme of the application, in the combined multilayer storage die head of the hollow blow molding machine, the flow channel of the storage core can adopt the same flow channel structure as the intermediate ring, so that no joint line is generated in the flow channel, the die head is fast in color changing, the production cost can be reduced, and energy conservation and emission reduction are realized.
According to the technical scheme of this application, combination formula multilayer storage die head of hollow blow molding machine includes: the device comprises a storage cylinder, a storage piston, a storage core, a first middle ring, a second middle ring and a third middle ring; the upper end of the storage core penetrates through the storage piston and is fixedly connected with the control core rod through a locking nut, and a mold core is arranged at the lower section of the storage core. Further, in the combined multilayer magazine die, more intermediate rings may be provided to form a multilayer structure having three or more layers.
A first channel is formed between the upper section of the storage core and the first intermediate ring, a second channel is formed between the first intermediate ring and the second intermediate ring, and a third channel is formed between the second intermediate ring and the third intermediate ring; the upper portion of storage cylinder is provided with the storage cylinder upper cover, the storage cylinder upper cover is provided with first feed inlet, second feed inlet, third feed inlet, first feed inlet the second feed inlet, the third feed inlet corresponds to respectively first passageway, the second passageway, the third passageway. The storage core, the first intermediate ring, the second intermediate ring and the third intermediate ring are concentrically arranged and fixed to each other through bolt threads, and the first intermediate ring is fixedly connected to the storage cylinder upper cover.
According to the technical scheme of the application, optionally, a combined flow channel formed by a grading flow channel and a multi-inlet spiral flow channel structure is arranged at the upper section of the storage core, the combined flow channel is provided with a compression section at the tail end of the spiral flow channel, a first channel is formed between the combined flow channel and the inner wall of the first middle ring, and the inlet end of the combined flow channel is communicated to a first feed inlet; and the combined runner is provided with a compression section at the tail end of the spiral runner, and the clearance between the outer diameter of the compression section and the first intermediate ring is within 8mm (less than or equal to 8 mm).
According to the technical scheme of the application, optionally, a combined runner formed by a grading runner and a multi-inlet spiral runner structure is arranged on the outer wall of the first middle ring, and the combined runner is provided with a compression section at the tail end of the spiral runner; the second channel is formed between the combined flow channel and the inner wall of the second middle ring, the inlet end of the combined flow channel is communicated to the second feed inlet, and the clearance between the outer diameter of the compression section and the first middle ring is within 8mm (less than or equal to 8 mm).
According to the technical scheme of the application, optionally, a combined flow channel formed by a grading flow channel and a multi-inlet spiral flow channel structure is arranged on the outer wall of the second middle ring, and the combined flow channel is provided with a compression section at the tail end of the spiral flow channel; the third channel is formed between the combined flow channel and the inner wall of the third middle ring, and the inlet end of the combined flow channel is communicated to the third feed inlet; the clearance between the outer diameter of the compression section and the first intermediate ring is within 8mm (8 mm or less).
According to the technical solution of the present application, optionally, in an embodiment, a gap between the highest position of the flow passage wall of the spiral flow passage and the inner wall of the intermediate ring is within 8mm (less than or equal to 8 mm); the width of the spiral flow channel is more than or equal to 5mm, and the depth of the flow channel is more than or equal to 5 mm.
According to the technical scheme of the application, optionally, the outer wall of the third middle ring is not provided with a flow passage and is arranged in the material storage piston.
According to the technical scheme of the application, optionally, the storage core, the first middle ring, the second middle ring and the third middle ring are arranged in a staggered mode layer by layer, so that the storage cylinder upper cover is provided with feed inlets corresponding to the flow channels.
Specifically, the storage core is arranged to be fixedly connected with the control core rod, and a first feed inlet formed in the storage cylinder is communicated to an inlet of a first channel formed between the outer wall of the storage core and the inner wall of the first middle ring.
According to the technical solution of the present application, optionally, the first intermediate ring is configured to be fixedly connected with the upper cover of the accumulator, and has a protruding section relative to the second intermediate ring, and the second feed port provided on the accumulator is communicated to the inlet of the second passage between the outer wall of the first intermediate ring and the inner wall of the second intermediate ring through the protruding section of the first intermediate ring.
According to the technical solution of the present application, optionally, the second intermediate ring is configured to be fixedly connected with the first intermediate ring and has a protruding section relative to the third intermediate ring, and the third feed port disposed on the storage tank is communicated to an inlet of the second channel formed between the outer wall of the second intermediate ring and the inner wall of the third intermediate ring through the protruding section of the second intermediate ring.
According to the technical scheme of this application, optionally, the third intermediate ring sets up to with second intermediate ring fixed connection, and the outer wall of third intermediate ring with the inner wall contact of magazine piston.
According to the technical scheme of the application, optionally, the middle section of the storage core is of a stepped structure, the first intermediate ring, the second intermediate ring and the third intermediate ring are respectively arranged at the upper part of the stepped structure, and a gap is formed between the bottom of each intermediate ring and the stepped structure; the first channel, the second channel and the third channel are communicated with each other at the middle section of the storage core, and are further converged and communicated into the storage cylinder.
According to the technical scheme of the application, when the combined multilayer storage die head of the hollow blow molding machine is used, the melted plastic sizing material respectively enters a first channel, a second channel and a third channel through a first feed inlet, a second feed inlet and a third feed inlet of the material storage cylinder cover, the material of the first layer passes through a combined flow channel on the outer wall of the material storage core, the material of the second layer passes through the second channel between the first middle ring and the second middle ring, the plastic sizing material of the third layer passes through the third channel between the second middle ring and the third middle ring, and the three channels are converged at the tail end and enter the storage cylinder, the storage piston is pushed upwards, the servo piston at the top moves up and down axially to control the opening and closing of the mold core through the control core rod, the servo piston moves up and down axially to open the mold core through the control core rod, and the storage piston is pressed down through the upper servo oil cylinder to eject the melted plastic material.
According to the technical scheme of the application, the first intermediate ring and the second intermediate ring are combined to form a flow channel with a flow channel grading step, and the flow channel is combined with a multi-inlet spiral structure flow channel, wherein each intermediate ring is provided with a straight extension section, the straight extension section extends from the tail end of a compression section on the intermediate ring to the bottom of the intermediate ring, the length of the straight extension section is greater than 3mm, and the straight extension section does not comprise the compression section.
According to the technical scheme of the application, the material storage core of the combined type multilayer material storage die head can also adopt the die head inner core with the integral spiral runner structure; and the structure of the integral spiral flow channel of the storage core as described above can also be applied to the flow channel of the outer intermediate ring.
This applicationThe combined storage core of the hollow blow molding machine is further provided, the combined storage core comprises a die head inner core and a plurality of middle rings which are concentrically nested, runners are arranged on the outer walls of the die head inner core and the middle rings to form a plurality of mutually independent channels, and a feed inlet is arranged in each channel of the combined storage core; the flow channel of each middle ring adopts a multi-inlet spiral flow channel structure and a grading flow channel to form a combined flow channel, the grading flow channel adopts a step-by-step branching structure, and the flow channel starts from the starting ends of two sides of the outer wall of the middle ring and starts from 2 n The material enters the multi-stage mixing flow channel from the feeding hole, enters the multi-inlet spiral flow channel from the plurality of openings of the multi-stage mixing flow channel, enters the compression section, enters the linear extension section from the compression section, finally flows out from the bottom of each intermediate ring, is converged and enters the material storage cylinder, and the flow channel of the material storage inner core can adopt the same flow channel structure as the intermediate ring or adopt the die head inner core as described above, wherein the flow channel is set as an integral spiral flow channel.
The utility model has the advantages that:
according to the die head inner core of the hollow blow molding storage type die head, the flow channel at the upper section of the die head inner core adopts the flow channel integral spiral structure, so that the material enters the fluid channel of the storage cylinder to form an integral spiral flow channel, the produced finished product has no converging line, and the product quality is improved; and according to the structure of the die head inner core, a product formed after the material blank is injected is not easy to crack after being demoulded. Further, the runner of the die head inner core of the spiral runner adopts an integral spiral runner, the thickness of the runner wall is extremely small, and a gap within 8mm exists between the highest position of the runner wall of the spiral runner at the upper section of the die head inner core and the inner wall of the middle ring, so that a channel formed between the spiral runner and the middle ring is axially communicated along the inner wall of the middle ring, and thus composite flow is formed in a material channel formed between the spiral runner and the middle ring, and the color change is extremely quick. In addition, the die head inner core of the application also has the advantages of simple structure, convenience in manufacturing and installation and the like.
The combined type multilayer storage die head is concentrically sleeved with a plurality of intermediate rings on the basis of the original intermediate rings, and a flow channel is processed on the outer wall of each intermediate ring. The flow channel of each intermediate ring can adopt a multi-inlet spiral flow channel structure and a grading flow channel to form a combined flow channel; the material entering from the feed inlet firstly enters 2 n The multi-stage mixing flow channel with the multiplying power branched step by step enters the multi-inlet spiral flow channel from a plurality of openings of the multi-stage mixing flow channel, and finally converges and enters the storage cylinder, so that the flow velocity of materials can be increased, and the processing efficiency is improved; and the design of combination formula runner can also greatly improve the look efficiency of trading of storage die head. In addition, due to the design of the combined runner, the multilayer storage die head can also avoid the problem of a confluent line.
According to the combined type multilayer storage die head, a first channel is formed between the upper section of the storage core and the first middle rings, a second channel is formed between the first middle rings and the second middle rings, a third channel is formed between the second middle rings and the third middle rings, each channel is formed by the combined type flow channel and the inner wall of the adjacent middle ring, the channels are not interfered with each other, feeding holes corresponding to the flow channels are fed simultaneously, and the working efficiency of the die head can be further improved.
According to the combined type multilayer storage die head, a multilayer plastic product can be produced by adopting the multilayer die head, and three raw material inlets are used for feeding materials synchronously, so that color mixing can be avoided; in addition, the feeding rate of the raw materials is controlled by the rotating speed of the screw, and the feeding speed can be accurately controlled by a computer; furthermore, the inner layer is made of brand new materials, the color cannot be separated out, the middle layer can be made of recycled materials to reduce finished products, and the outer layer is made of anti-aging materials, can resist ultraviolet rays and the like and is aged to prolong the service life.
The utility model provides a combination formula multilayer storage die head's storage core can also adopt the die head inner core of whole spiral runner structure to still adopt the combination formula runner that hierarchical mixed type runner and the spiral runner of many entries formed at the runner of a plurality of intermediate rings, thereby make multilayer storage die head's machining efficiency and trade look efficiency and improve an order of magnitude again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the construction of the die core of a single layer stock die for a blow molding machine according to the present invention;
fig. 2 is a schematic diagram of the die core of a single layer storage die for a blow molding machine according to the present invention;
fig. 3 is a schematic structural view of a combined runner of a combined multilayer storage die according to the present invention;
fig. 4 is a schematic structural view of a combined runner of the combined multilayer storing die head according to the invention;
fig. 5 is a schematic view of a modular multi-level stock die with a modular flow passage according to the present invention;
fig. 6 is a schematic view of a modular multi-level storage die having a modular runner according to the present invention;
FIG. 7 is a schematic diagram of the structure of the stock core of the hollow blow molding stock die of patent CN 215040099U;
wherein, 1, a storage cylinder; 2. a material storage piston; 3. a storage core; 4. a first intermediate ring; 5. controlling the core rod; 6. a second intermediate ring; 7. a third intermediate ring; 8. an upper cover of the storage cylinder; 9. a first feed port; 10. a second feed port; 11. and a third feed port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The first embodiment is as follows:
this example provides a die core specifically for use in a hollow blow molding magazine die such as that of patent CN215040099U, the flow path between the die core and the intermediate ring being a generally spiral flow path as shown in fig. 1 and 2.
The storage core in patent CN215040099U, the die head inner core, as shown in figure 7, the die head inner core divide into two sections about and adopt the sectional type processing to connect, upper segment storage core is hollow screw, and storage piston and through lock nut and control plug fixed connection are passed to the upper end of upper segment storage core, and the outer wall of upper segment storage core and the region of intermediate ring contact are provided with the runner.
For example, in the hollow blow molding machine stock type die head of patent CN215040099U, the important function of the flow channel of the straight section on the stock core in the die head, which is in contact with the intermediate ring, is to make the molten material flow under the condition of small pressure loss; also, the runner exceeding the necessary size may cause adverse effects such as an increase in scrap, a deterioration in material cost, an extension in molding cycle, an increase in waste, and the like. One of the indexes expressing the flow channel efficiency is an inscribed circle area of the cross-sectional shape, and the larger the inscribed circle area is, the larger the area of the molten material flowing is, and the smoother the flow of the molten material is. The most desirable cross-sectional shape of the flow channel is circular, but since the movable side and the fixed side must be engraved with the flow channel at the same time, the die processing cost is increased, and a trapezoidal section or a section obtained by further cutting a half circle is generally used.
According to the embodiment, the straight section of the upper section of the die head inner core, which is in contact with the middle ring, adopts the spiral flow channel as a whole. That is, on the hollow screw at the upper section of the die head inner core, a straight section contacted with the inner wall of the middle ring adopts a continuous spiral runner, and an opening corresponding to a feed inlet of the material storage cylinder cover is formed at the initial section of the spiral runner.
According to the embodiment, the cross section of the spiral flow channel at the upper section of the die head inner core is in an approximately trapezoidal shape, the interior of the flow channel is further processed to form smooth transition, and the flow channel is ensured not to exceed the necessary size while the maximum inscribed circle area of the cross section is ensured.
According to the present embodiment, in one embodiment, the flow channel width of the spiral flow channel is greater than or equal to 5mm, and the flow channel depth is greater than or equal to 5 mm. More specifically, the minimum width of the trapezoidal opening of the spiral flow channel is more than or equal to 5 mm.
According to the embodiment, a gap exists between the highest position of the runner wall of the spiral runner at the upper section of the die head inner core and the inner wall of the middle ring, so that a channel formed between the spiral runner and the middle ring is axially communicated along the inner wall of the middle ring.
According to the embodiment, the distance between the highest position of the runner wall of the spiral runner of the upper section of the die core and the inner wall of the middle ring is within 8 mm.
According to the embodiment, the distance is kept between the highest position of the flow channel wall of the spiral flow channel and the middle ring, so that the channel formed between the spiral flow channel and the middle ring is axially communicated along the inner wall of the middle ring, the arrangement can ensure that materials entering the channel mainly flow in the spiral flow channel, and the color changing speed and efficiency are increased; and downward flow with high flow velocity is formed between the flow channel wall of the spiral flow channel and the inner wall of the middle ring, and the mixture of the two flows forms composite flow between the middle ring and the flow channel wall, so that high momentum is brought, the materials flowing in the spiral flow channel are sheared and diluted, and the color changing speed and efficiency are greatly improved.
According to the embodiment, when the spiral flow channel at the upper section of the die head inner core is processed, an angle can be arranged on the side surface of the flow channel, so that the die is easier to demould. In addition, the inner surface of the spiral flow passage is polished to be smooth by adopting a rubber grindstone or wrapping cloth and the like so as to prevent pressure loss and cause slow color change of the core material of the die head.
The overall structure of the hollow blow molding machine magazine die for which the die core of the present application is used is described in detail in patent CN 215040099U. According to the description of the patent, the hollow blow molding storage type die head comprises a servo oil cylinder, a material injection device, a material storage device and a control core rod which is longitudinally arranged; the material injection device is positioned below the servo oil cylinder and comprises a material injection cylinder upper cover, a material injection cylinder barrel, a material injection cylinder lower cover and a material injection piston; the material storage device is positioned below the material injection device and comprises a material storage cylinder barrel, a material storage piston, a material storage core, a middle ring and a material storage cylinder cover; the material storage core is divided into an upper section and a lower section, the upper end of the upper section of the material storage core penetrates through the material storage piston and is fixedly connected with the control core rod through a locking nut, a flow passage is arranged between the material storage core at the upper section and the middle ring, and a sliding sleeve and a mold core are arranged in the lower section of the material storage core; and feed inlets are formed in two sides of the storage cylinder cover.
According to this embodiment, the hollow blow molding machine magazine die to which the die core of the present application is applied can employ a magazine die having the same general structure as the magazine die of the above-mentioned patent, and replace the magazine core thereof with the die core of the present application.
Example two
This example provides a combined magazine die, as shown in fig. 3-6, comprising: the device comprises a storage cylinder 1, a storage piston 2, a storage core 3, a first middle ring 4, a control core rod 5, a second middle ring 6, a third middle ring 7, a storage cylinder upper cover 8, a first feeding hole 9, a second feeding hole 10 and a third feeding hole 11. The material storage core 3, the first middle ring 4, the second middle ring 6 and the third middle ring 7 are concentrically arranged with the material storage cylinder upper cover 8 and fixedly connected through bolt threads, and the upper end of the material storage core 3 penetrates through the material storage piston 2 and is fixedly connected with the control core rod 5 through a locking nut.
According to the embodiment, the combined type multilayer storage die head is characterized in that a plurality of outer intermediate rings are concentrically nested on the basis of the original intermediate rings, a flow channel is arranged on the outer wall of each outer intermediate ring to form a plurality of mutually independent channels, and each channel is respectively provided with a feed inlet, so that the channels are not interfered with each other.
According to the embodiment, the flow channel of each intermediate ring of the combined multilayer storage die head of the hollow blow molding machine can adopt a multi-inlet spiral flow channel structure and a grading flow channel to form a combined flow channel, as shown in the attached figures 3 and 4; wherein, the graded flow channel adopts a step-by-step bifurcation structure, and starts from the starting ends at two sides of the outer wall of the middle ring by 2 n The multiplying power of the multi-stage mixed type flow passage is gradually branched to form a multi-stage mixed type flow passage, and a plurality of openings and a plurality of inlets are formed at the tail end of the multi-stage mixed type flow passageThe spiral type flow passages are communicated, materials entering from the feeding hole firstly enter the multi-stage mixing flow passage, then enter the spiral type flow passage with multiple inlets from multiple openings of the multi-stage mixing flow passage, and finally are converged and enter the storage cylinder.
According to the embodiment, in the combined type multilayer storage die head of the hollow blow molding machine, the flow channel of the storage core can adopt the same flow channel structure as that of the middle ring, so that a confluence line is not generated in the flow channel, the die head is fast in color changing, the production cost can be reduced, and energy conservation and emission reduction are realized.
According to the embodiment, a first channel is formed between the upper section of the storage core 3 and the inner wall of the first intermediate ring 4, a second channel is formed between the outer wall of the first intermediate ring 4 and the outer wall of the second intermediate ring 6, and a third channel is formed between the outer wall of the second intermediate ring 6 and the inner wall of the third intermediate ring 7; the upper portion of storage vat is provided with the storage vat upper cover, the storage vat upper cover is provided with first feed inlet 9, second feed inlet 10, third feed inlet 11, first feed inlet 9, second feed inlet 10 third feed inlet 11 corresponds respectively first passageway the second passageway the third passageway. The storage core 3, the first intermediate ring 4, the second intermediate ring 6 and the third intermediate ring 7 are concentrically arranged and fixed to each other by bolt threads, and the first intermediate ring is fixedly connected to the storage cylinder upper cover.
According to the embodiment, a combined flow channel formed by a grading flow channel and a multi-inlet spiral flow channel structure is arranged at the upper section of the storage core 3, a compression section is arranged at the tail end of the spiral flow channel of the combined flow channel, the first channel is formed between the combined flow channel and the inner wall of the first middle ring, and the inlet end of the combined flow channel is communicated to the first feed port 9; the clearance between the outer diameter of the compression section and the first intermediate ring is within 8mm (8 mm or less).
According to the embodiment, the outer wall of the first intermediate ring 4 is provided with a combined flow channel formed by a stepped flow channel and a multi-inlet spiral flow channel structure, the combined flow channel is provided with a compression section at the tail end of the spiral flow channel, the second channel is formed between the combined flow channel and the inner wall of the second intermediate ring 6, and the inlet end of the combined flow channel is communicated to the second feed port 10; the clearance between the outer diameter of the compression section and the first intermediate ring is within 8mm (8 mm or less).
According to the embodiment, the outer wall of the second intermediate ring 6 is provided with a combined flow channel formed by a stepped flow channel and a multi-inlet spiral flow channel structure, the combined flow channel is provided with a compression section at the tail end of the spiral flow channel, the third channel is formed between the combined flow channel and the inner wall of the third intermediate ring 7, and the inlet end of the combined flow channel is communicated to the third feed inlet 11; the clearance between the outer diameter of the compression section and the first intermediate ring is within 8mm (8 mm or less).
According to this embodiment, in one embodiment, the gap between the highest point of the flow channel wall of the spiral flow channel and the inner wall of the intermediate ring is within 8mm (≦ 8 mm); the width of the spiral flow channel is more than or equal to 5mm, and the depth of the flow channel is more than or equal to 5 mm.
According to this embodiment, the outer wall of the third intermediate ring 7 is provided without flow channels and is arranged inside the magazine piston 2.
According to the embodiment, the material storage core 3, the first intermediate ring 4, the second intermediate ring 6 and the third intermediate ring 7 are arranged in a staggered manner layer by layer, so that the material storage cylinder is provided with material inlets corresponding to the flow channels on the upper cover.
Specifically, the storage core 3 is fixedly connected with the control core rod 5, and a first feed inlet 9 arranged on the storage cylinder penetrates through the first intermediate ring 4 and is communicated to an inlet of a first channel formed between the outer wall of the storage core and the inner wall of the first intermediate ring 4.
According to the present exemplary embodiment, the first intermediate ring 4 is arranged in fixed connection with the storage vat upper cover and has a projection relative to the second intermediate ring, and the second feed opening arranged on the storage vat is connected via the projection of the first intermediate ring to a second passage between the outer wall of the first intermediate ring and the inner wall of the second intermediate ring.
According to the embodiment, the second middle ring 6 is fixedly connected with the first middle ring 4, and the upper end of the middle ring is provided with a threaded hole for fixed connection; and a third feed port arranged on the storage cylinder is communicated to a second channel formed between the outer wall of the second middle ring and the inner wall of the third middle ring through the extension section of the second middle ring.
According to the embodiment, the third middle ring 7 is fixedly connected with the second middle ring 6, and the upper end of the middle ring is provided with a threaded hole for fixed connection; and the outer wall of the third intermediate ring 7 is in contact with the inner wall of the magazine piston 2.
According to the embodiment, the middle section of the storage core 3 is a stepped structure, the first intermediate ring 4, the second intermediate ring 6 and the third intermediate ring 7 are respectively arranged at the upper part of the stepped structure, and a gap is arranged between the bottom of each intermediate ring and the stepped structure, so that the first channel, the second channel and the third channel are communicated with each other at the middle section of the storage core and further merged and communicated into the storage cylinder.
According to this embodiment, when the combined multilayer storage die head of the blow molding machine is in use, molten plastic materials enter the first channel, the second channel and the third channel through the first feed port, the second feed port and the third feed port of the storage cylinder cover, the material of the first layer passes through the combined flow channel on the outer wall of the storage core, the material of the second layer passes through the second channel between the first middle ring and the second middle ring, the plastic materials of the third layer pass through the third channel between the second middle ring and the third middle ring, and the three channels are converged at the tail end and enter the material storage cylinder, the material storage piston is pushed upwards, the servo piston at the top moves up and down axially and controls the opening and closing of the mold core through the control core rod, the servo piston moves up and down axially and opens the mold core through the control core rod, and the material storage piston is pressed down through the upper servo oil cylinder to eject the molten plastic material.
According to the embodiment, the first intermediate ring, the second intermediate ring combined flow passage graded flow passage and the multi-inlet spiral structure flow passage are combined, wherein each intermediate ring is provided with a straight extension section, the straight extension section extends from the tail end of the compression section on the intermediate ring to the bottom of the intermediate ring, and the length of the straight extension section is more than 3 mm. And the linear extension section does not comprise a compression section at the tail end of the combined runner, and the linear extension section has the function of stabilizing the thickness of the blank and ensuring that color mixing cannot occur.
According to the embodiment, the combined type multi-layer storage die core can also adopt a die core integrally adopting a spiral runner structure as described in the first embodiment.
According to the embodiment, molten plastic rubber enters through a first feeding hole 9, a second feeding hole 10 and a third feeding hole 11 of the storage cylinder 1 respectively, a first layer of plastic rubber passes through a gap flow channel between the storage core 3 and the first intermediate ring 4, a second layer of plastic rubber passes through a gap flow channel between the intermediate ring 4 and the outer intermediate ring 6 and then is fused into the storage cylinder 1, the storage piston 2 is pushed upwards, the servo piston at the top moves up and down axially to control the opening and closing of the mold core through the control core rod 5, the servo piston moves up and down axially to open the mold core through the control core rod 5, and the storage piston 2 is pressed down through the upper servo oil cylinder to eject the molten plastic materials.
The protection scope of the present invention is not limited to the above embodiments, and any modifications, equivalent replacements, and improvements that can be made by a person skilled in the art within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The die head inner core of the storage die head of the hollow blow molding machine is characterized in that a spiral flow channel is arranged on a straight section of the upper section of the die head inner core, which is in contact with the middle ring; the spiral flow channel is distributed on the hollow material storage core at the upper section of the die head inner core, an opening corresponding to the material inlet of the material storage die head is arranged at the initial section of the spiral flow channel, the cross section of the spiral flow channel is a trapezoidal section, and smooth transition is formed inside the flow channel.
2. The die core of the hollow blow molding machine storage die head according to claim 1, wherein the highest position of the runner wall of the spiral runner at the upper section of the die core has a gap with the inner wall of the intermediate ring, so that a channel formed between the spiral runner and the intermediate ring is axially communicated along the inner wall of the intermediate ring; the gap between the highest position of the flow channel wall of the spiral flow channel and the inner wall of the middle ring is less than or equal to 8 mm.
3. The die head inner core of the hollow blow molding machine storage die head according to claim 2, wherein the spiral flow channel is a trapezoidal opening, and the minimum width of the flow channel is more than or equal to 5 mm; and the depth of the flow channel is more than or equal to 5 mm.
4. Combination formula multilayer storage die head of cavity blowing machine, its characterized in that includes: the device comprises a storage cylinder, a storage piston, a storage core, a first middle ring, a second middle ring and a third middle ring; the upper end of the storage core penetrates through the storage piston and is fixedly connected with the control core rod through a locking nut, and a mold core is arranged at the lower section of the storage core; a first channel is formed between the upper section of the storage core and the first intermediate ring, a second channel is formed between the first intermediate ring and the second intermediate ring, and a third channel is formed between the second intermediate ring and the third intermediate ring; the upper portion of storage vat is provided with the storage vat upper cover, the storage vat upper cover is provided with first feed inlet, second feed inlet, third feed inlet, first feed inlet the second feed inlet the third feed inlet respectively corresponding to first passageway the second passageway the entry of third passageway, the storage core first intermediate ring the second intermediate ring the third intermediate ring sets up with one heart and through screw thread fixed connection each other, and first intermediate ring fixed connection to the storage vat upper cover.
5. The combined multilayer material storage die head of the blow molding machine according to claim 4, wherein the upper section of the material storage core is provided with a combined flow channel formed by a graded flow channel and a multi-inlet spiral flow channel structure, the combined flow channel is provided with a compression section at the tail end of the spiral flow channel, the combined flow channel and the inner wall of the first middle ring form the first channel, and the inlet end of the combined flow channel is communicated to the first feed inlet; the clearance between the outer diameter of the compression section and the first intermediate ring is less than or equal to 8 mm;
the outer wall of the first middle ring is provided with a combined flow channel formed by a grading flow channel and a multi-inlet spiral flow channel structure, the combined flow channel is provided with a compression section at the tail end of the spiral flow channel, a second channel is formed between the combined flow channel and the inner wall of the second middle ring, and the inlet end of the combined flow channel is communicated to a second feed inlet; the clearance between the outer diameter of the compression section and the first intermediate ring is less than or equal to 8 mm;
the outer wall of the second middle ring is provided with a combined runner formed by a multi-inlet spiral runner structure and a grading runner, the combined runner is provided with a compression section at the tail end of the spiral runner, a third channel is formed between the combined runner and the inner wall of the third middle ring, and the inlet end of the combined runner is communicated to a third feed inlet; the clearance between the outer diameter of the compression section and the first intermediate ring is less than or equal to 8 mm;
the outer wall of the third middle ring is not provided with a flow passage, and the third middle ring is arranged in the material storage piston.
6. The combined multilayer material storage die head of the blow molding machine according to claim 4, wherein the material storage core, the first intermediate ring, the second intermediate ring and the third intermediate ring are arranged in a staggered manner layer by layer, so that the material storage cylinder upper cover is provided with material inlets corresponding to the flow passages.
7. The combined multilayer storage die head of the hollow blow molding machine according to claim 6, wherein the storage core is fixedly connected with the control core rod, and a first feed inlet arranged on the storage cylinder is communicated to an inlet of a first channel formed between the outer wall of the storage core and the inner wall of the first intermediate ring;
the first intermediate ring is fixedly connected with the storage cylinder upper cover and is provided with a protruding section relative to the second intermediate ring, and a second feed inlet arranged on the storage cylinder is communicated to an inlet of a second channel between the outer wall of the first intermediate ring and the inner wall of the second intermediate ring through the protruding section of the first intermediate ring;
the second intermediate ring is fixedly connected with the first intermediate ring and is provided with a protruding section relative to the third intermediate ring, and a third feeding port arranged on the storage cylinder is communicated to an inlet of a second channel formed between the outer wall of the second intermediate ring and the inner wall of the third intermediate ring through the protruding section of the second intermediate ring;
the third middle ring is fixedly connected with the second middle ring, and the outer wall of the third middle ring is in contact with the inner wall of the material storage piston.
8. The combined multi-level stock die of the blow molding machine of claim 4, wherein the intermediate section of the stock core is of a stepped configuration, and the first intermediate ring, the second intermediate ring and the third intermediate ring are respectively disposed at an upper portion of the stepped configuration, such that the first channel, the second channel and the third channel communicate with each other at the intermediate section of the stock core and further merge into the stock cylinder.
9. The combined multilayer storage die head of the blow molding machine according to claim 4, wherein the first intermediate ring and the second intermediate ring are nested concentrically to form the combined multilayer storage die head, wherein each layer of intermediate ring on the combined multilayer storage die head has a linear extension section, the linear extension section extends from below the compression section on each intermediate ring to the bottom of the intermediate ring, and the length of the linear extension section is greater than 3 mm; and the linearly extending section does not include the compressing section.
10. The combined multilayer storage die head of the blow molding machine according to claim 4, wherein the storage core of the storage die head adopts the runner structure of the die head inner core according to claim 1; and wherein a plurality of inter-nesting intermediate rings are provided, forming a multi-layer structure; the runners on the plurality of intermediate rings are spiral runners of the die core of claim 1 or combined runners of claim 5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114889096A (en) * | 2022-03-30 | 2022-08-12 | 苏州双瑞机械制造股份有限公司 | Die head inner core of hollow blow molding machine storage die head and combined type multilayer storage die head |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889096A (en) * | 2022-03-30 | 2022-08-12 | 苏州双瑞机械制造股份有限公司 | Die head inner core of hollow blow molding machine storage die head and combined type multilayer storage die head |
| CN114889096B (en) * | 2022-03-30 | 2024-05-14 | 苏州双瑞机械制造股份有限公司 | Die head inner core of storage die head of hollow blow molding machine and combined type multilayer storage die head |
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