CN116118149A - Die-opening type die capable of producing ultra-small PET packing belt - Google Patents
Die-opening type die capable of producing ultra-small PET packing belt Download PDFInfo
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- CN116118149A CN116118149A CN202310185456.9A CN202310185456A CN116118149A CN 116118149 A CN116118149 A CN 116118149A CN 202310185456 A CN202310185456 A CN 202310185456A CN 116118149 A CN116118149 A CN 116118149A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/255—Flow control means, e.g. valves
- B29C48/2556—Flow control means, e.g. valves provided in or in the proximity of dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2029/00—Belts or bands
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
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Abstract
The application belongs to the technical field of packaging belt die equipment, and particularly discloses a die-opening die capable of producing ultra-small PET packaging belts, which is provided with a front die and a rear die, wherein the front die is provided with a main runner, the rear die is correspondingly provided with a split runner, N cavity-entering runners are sequentially arranged at the bottom of the split runner, N is more than or equal to 1, and N is an integer; the main flow channel is communicated with the shunt channel; a space is reserved between every two adjacent cavity-entering flow passages; a die cavity is respectively and penetratingly arranged below the port of each cavity entering runner, and the bottom end of the die cavity is provided with an outlet; the front die and the rear die are correspondingly spliced and fixed through a connecting assembly to form an upper die, and the bottom of the upper die is correspondingly connected with a die orifice adjusting block; the die opening adjusting block is provided with a die opening, and the die opening corresponds to the position of the outlet. The packaging belt can be quickly disassembled and assembled for replacement, the flexibility of the conversion between various sizes of the packaging belt is enhanced, and the forming quality is improved.
Description
Technical Field
The invention belongs to the technical field of packing belt mould equipment, and particularly relates to a die-opening mould capable of producing ultra-small PET packing belts.
Background
The packing belt is a common material in industrial production, has the characteristics of good elasticity, strong water resistance, strong wear resistance, light weight, softness and the like, and is widely used in manual bundling or mechanical bundling. The packing belt is usually produced by a special packing belt die, the traditional packing belt die is difficult to produce the packing belt with ultra-small specification, the production requirement of the ultra-small specification packing belt with various different sizes cannot be well met, once the traditional packing belt die is designed and molded, the die orifice of the traditional packing belt die is locked into a single form, the production type conversion of various packing belts is difficult to realize, the adaptability is poor, if the traditional packing belt die is modified, the whole runner and the design structure of a die cavity are required to be modified, and the modification cost is high; the traditional packing belt mould can only separate even number of mould cavities due to the design of the hanger type runner layout, and the traditional packing belt mould needs to be specially provided with mounting holes for mounting heating rods, so that the runner layout of the mould is disturbed, the flow distribution is uneven or insufficient, and the forming quality of packing belts is poor.
Accordingly, the prior art is subject to improvement and development.
Disclosure of Invention
The utility model aims at providing a can produce die-opening type mould of ultra-small specification PET packing area, can realize quick assembly disassembly and change, strengthen the flexibility of changing between the multiple size of packing area to and improve shaping quality.
The die opening type die capable of producing the ultra-small PET packing belt comprises a front die and a rear die, wherein the front die is provided with a main runner, the rear die is correspondingly provided with a sub-runner, N cavity-entering runners are sequentially arranged at the bottom of the sub-runner, N is more than or equal to 1, and N is an integer;
the main flow channel is communicated with the shunt channel;
a space is reserved between every two adjacent cavity-entering flow passages;
a die cavity is respectively and penetratingly arranged below the port of each cavity entering runner, and the bottom end of the die cavity is provided with an outlet;
the front die and the rear die are correspondingly spliced and fixed through a connecting assembly to form an upper die, and the bottom of the upper die is correspondingly connected with a die orifice adjusting block;
the die opening adjusting block is provided with a die opening, and the die opening corresponds to the position of the outlet;
the shape of the die orifice is set according to actual use requirements;
and the packing belt melt flows into the split runner from the main runner, enters the corresponding die cavities through N cavity entering runners, and finally leads out N formed packing belts with set shapes from the die openings.
According to the die mouth type die capable of producing the ultra-small PET packing belt, melt materials are injected through the main runner of the front die, the melt materials enter N cavity-entering runners through the corresponding through flow distribution runners of the rear die, and then N formed packing belt products are led out through the die cavity and the die mouth adjusting block, so that the limit that the traditional die can only produce odd number of packing belt products is eliminated, the production of multiple numbers of packing belt products is adapted, the die mouth adjusting block can be changed into different shapes according to actual use requirements through the die mouth structure existing in the die mouth adjusting block, and flexible conversion of the packing belt between multiple sizes is further realized; the front die and the rear die are correspondingly spliced to form the upper die, the connecting die opening adjusting block is additionally arranged at the bottom of the upper die, the quick disassembly and replacement between the upper die and the die opening adjusting block are realized under the condition that the structural layout of the runner of the upper die and the structural design of the die cavity are not influenced, namely, the upper die formed by the front die and the rear die is not required to be changed, the production and the molding of packing belts with various different sizes can be realized only by changing the die opening adjusting block, the disassembly and replacement convenience between the dies is greatly improved, and the molding quality of the packing belts is also indirectly protected due to the fact that the upper die formed by the front die and the rear die is not required to be changed.
Further, the bottom end of the upper die is provided with a positioning strip;
the die orifice adjusting block is in abutting contact with the positioning strip and then is fixedly connected with the upper die.
The utility model provides a but production ultra-small specification PET packing area's die orifice mould sets up the locating strip through the bottom at last mould, has realized convenient location and dismouting to the die orifice regulating block, when the die orifice regulating block needs to be installed promptly, only need support tight contact locating strip with the die orifice regulating block, connect fixedly after both paste tightly, the structural design of locating strip has both guaranteed mounting structure's simplification, the dismouting efficiency of die orifice regulating block has also been guaranteed and the convenience when changing to nimble and quick realization packing area between multiple shaping size changes or compatible production.
Further, the length of the die orifice is less than the length of the outlet;
the ratio of the number of die openings to the number of outlets is one-to-one or many-to-one.
The die opening type die capable of producing the ultra-small PET packing belt, provided by the application, has the advantages that the length of the die opening is smaller than that of the outlet, namely, when the melt of packing belt materials is guided out through the die cavity, the die opening size of the die opening adjusting block is smaller than that of the die cavity, so that a relative pressure difference is generated between the outlet and the die opening, and under the action of the pressure difference, the melt passes through the outlet and is extruded and formed by the die opening, so that the flow of the melt is ensured to be sufficient and uniform, and the formed packing belt product is ensured to have high quality; the ratio of the number of the die openings to the number of the outlets is one-to-one or many-to-one, so that the output number or the size type of the formed packing belt is expanded, and the output efficiency or the diversity of the formed packing belt is improved.
Further, the rear mould is correspondingly provided with adjusting through holes above the ports of each cavity entering flow channel;
the adjusting through holes are correspondingly provided with adjusting screws.
Further, the position of each adjusting through hole and the position of the port of the corresponding cavity entering runner are arranged in a staggered mode.
Further, the die cavity comprises a diversion cavity, a storage buffer cavity and a forming cavity;
the diversion cavity is in an inverted funnel shape from top to bottom;
the storage buffer cavity is in an arc groove shape with a concave middle part from top to bottom;
the forming cavity is in a cuboid groove shape with uniform depth.
Further, the depth of the diversion cavity gradually decreases from top to bottom.
Further, a connecting cavity is connected between the diversion cavity and the storage buffer cavity in a penetrating way;
the depth of the connecting cavity is the same as the depth of the forming cavity.
Further, the connection assembly includes at least one first bolt and at least two second bolts;
at least one first bolt is arranged in the central area of the upper part of the upper die;
at least two second bolts are symmetrically arranged at the left side and the right side of the middle lower part of the upper die;
the diameter of the first bolt is larger than the diameter of the second bolt.
Further, the upper die is heated by a spinning box;
and a hanging ring is arranged at the top end of the rear die.
From the above, the die orifice type die capable of producing the ultra-small PET packing belt is characterized in that melt materials are injected through the main runner of the front die, enter N cavity-entering runners through the through split runners, and then export N formed packing belt products through the die cavity and the die orifice adjusting block, so that the limit that the traditional die can only produce odd number of packing belt products is eliminated, the die orifice type die is suitable for production of various numbers of packing belt products, the die orifice adjusting block can be changed into different shapes according to actual use requirements through the die orifice structure existing by the die orifice adjusting block, and flexible conversion among various sizes of the packing belt is further realized; the front die and the rear die are correspondingly spliced into the upper die, and the connecting die opening adjusting block is additionally arranged at the bottom of the upper die, so that the quick disassembly and replacement between the upper die and the die opening adjusting block are realized under the condition that the structural layout of the runner of the upper die and the structural design of the die cavity are not influenced, namely, the upper die formed by the front die and the rear die is not required to be changed, the production and the molding of packing belts with various different sizes can be realized only by changing the die opening adjusting block, the disassembly and replacement convenience between the dies is greatly improved, and the molding quality of the packing belts is also indirectly protected due to the fact that the upper die formed by the front die and the rear die is not required to be changed; the positioning strip is arranged at the bottom end of the upper die, so that the die adjusting block is conveniently positioned and disassembled, namely, when the die adjusting block is required to be installed, the die adjusting block is only required to be abutted against the positioning strip, and is fixedly connected after the die adjusting block and the positioning strip are tightly attached, the structural design of the positioning strip ensures the simplification of an installation structure, and also ensures the disassembly and assembly efficiency of the die adjusting block and the convenience in replacement, thereby flexibly and rapidly realizing the quick conversion or compatible production among various molding sizes of the packing belt; the length of the die orifice is smaller than that of the outlet, namely, when the melt of the packing belt material is guided out through the die cavity, the die orifice size of the die orifice regulating block is smaller than that of the die cavity, so that a relative pressure difference is generated between the outlet and the die orifice, under the action of the pressure difference, the melt passes through the outlet and is extruded and formed by the die orifice to be guided out, the flow of the melt is ensured to be sufficient and uniform, the formed packing belt product is ensured to have high quality, the ratio of the number of the die orifices to the number of the outlets is one to one or more to one, the expansion of the output number or size type of the formed packing belt is realized, and the output efficiency or diversity of the formed packing belt is improved; in order to facilitate further regulation and control of the flow, the rear mould is correspondingly provided with regulating through holes above the ports of each cavity entering flow passage, and is used for forming a flow regulating structure carrier, and the regulating through holes are correspondingly provided with regulating screws, namely, the regulating screws are controlled to move up and down in the regulating through holes by rotating the regulating screws, so that the ports of the cavity entering flow passages are blocked when the rear mould moves downwards, and the flow passing space is enlarged to discharge when the rear mould moves upwards, thereby achieving effective regulation and control of the flow; the position of each adjusting through hole and the port position of the corresponding cavity entering runner are arranged in a staggered mode, so that the through space of the flow is always reserved, and uneven or insufficient flow of the cavity entering runner at the edge due to too far distance from the main runner is prevented. In order to further improve the molding quality of the packing belt, the flow guide cavity is in an inverted funnel shape from top to bottom and is used for forming effective flow guide and dispersion effects on the melt, in particular, the inverted funnel-shaped structural design ensures that the melt with higher pressure can instantly obtain pressure diffusion and release after entering the cavity entering flow channel, so that the subsequent flow change is uniform and sufficient, the storage buffer cavity is in an arc groove shape with a concave middle part from top to bottom and is used for carrying, storing and buffering the melt flowing out of the flow guide cavity, the structure with the concave middle part ensures the strong storage capacity and continuous guiding of the melt, the arc groove structure ensures the change trend of the flow pressure from high to low to high, the melt is effectively stored and buffered, and meanwhile, the extrusion molding of the melt by the subsequent molding cavity is facilitated, and the molding quality of the packing belt is further improved; the forming cavity is in a rectangular groove shape with uniform depth, so that the melt of the packing belt is stably guided out; the depth of the flow guide cavity is gradually reduced from top to bottom and is used for increasing the flow pressure so that the flow guide cavity can enter the storage buffer cavity more quickly, and the subsequent forming efficiency is improved; a connecting cavity is connected between the flow guiding cavity and the storage buffer cavity, the depth of the connecting cavity is the same as that of the forming cavity, and the connecting cavity is used for enabling the melt to rapidly increase the flow pressure, so that the melt between the flow guiding cavity and the storage buffer cavity is conveyed more rapidly; the first bolt with larger diameter is arranged in the central area of the upper part of the upper die and is used for roughly reinforcing the front die and the rear die, namely realizing the powerful foundation fixing effect; the second bolts with smaller diameters are symmetrically arranged at the left side and the right side of the middle lower part of the upper die and are used for realizing the fine reinforcement of the front die and the rear die, namely, the butt joint adaptation degree and the splicing equilibrium of a runner in the upper die formed by the front die and the rear die and a die cavity are ensured, and the forming quality of the packing belt is further improved; the upper die adopts the spinning box to heat, does not need to design a special design mounting hole for a traditional heating rod heating mode, so that the interference of runner layout and die cavity structural design in the upper die is avoided, the forming quality of a packing belt is ensured while the heating structure is simplified, and the hanging ring arranged at the top end of the rear die also provides convenience for taking and transferring the rear die and the upper die.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the application. The objects and other advantages of the present application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
Fig. 1 is a schematic structural view of a die-opening die capable of producing ultra-small PET strapping tape according to an embodiment of the present application.
Fig. 2 is an exploded view of a die-top die for producing ultra-small PET strapping tape according to an embodiment of the present application.
Fig. 3 is a schematic structural view of a die adjusting block of a die capable of producing ultra-small PET strapping tapes according to an embodiment of the present application.
Fig. 4 is a schematic view showing a structure of a die-cut front die for producing ultra-small PET strapping tape according to an embodiment of the present application.
Description of the reference numerals: 1. a front mold; 101. a main flow passage; 102. a positioning strip; 2. a rear mold; 201. a sub-runner; 202. a cavity-entering runner; 203. a diversion cavity; 204. a connecting cavity; 205. a storage buffer chamber; 206. a molding cavity; 2061. an outlet; 207. adjusting the through hole; 3. a die orifice adjusting block; 301. a die orifice; 4. an adjusting screw; 5. a hanging ring; 6. a first bolt; 7. a second bolt; 8. and (5) quick connection of a screw.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.
As shown in fig. 1 and 2, the die mouth type die capable of producing ultra-small PET packing belts provided by the invention is provided with a front die 1 and a rear die 2, wherein the front die 1 is provided with a main runner 101, the rear die 2 is correspondingly provided with a sub-runner 201, the bottom of the sub-runner 201 is sequentially provided with N cavity entering runners 202, and N is more than or equal to 1 and N is an integer; the main runner 101 is correspondingly and penetratingly connected with the shunt runner 201; a space is reserved between every two adjacent cavity-entering flow passages 202; a die cavity is respectively and penetratingly arranged below the port of each cavity entering runner 202, and the bottom end of the die cavity is provided with an outlet 2061; the front die 1 and the rear die 2 are correspondingly spliced and fixed through a connecting component to form an upper die, and the bottom of the upper die is correspondingly connected with a die orifice adjusting block 3; as shown in fig. 1 to 3, the die adjusting block 3 is provided with a die 301, and the die 301 corresponds to the position of the outlet 2061; the shape of the die 301 is set according to the actual use requirement; the strapping tape melt enters the sub-runner 201 from the main runner 101, enters the respective corresponding mold cavities via the N cavity-entering runners 202, and finally derives N shaped strapping tapes of respective set shapes from the die opening 301.
In a specific application, the front mold 1 is provided with a main runner 101 for injecting packing belt melt, raw materials are provided for the subsequent sub-runners 201 and mold cavity forming, the rear mold 2 is correspondingly provided with the sub-runners 201 for splitting the packing belt melt injected by the main runner 101, a structural basis is provided for the separation output of a plurality of subsequent formed packing belts, the bottom of the sub-runners 201 is sequentially provided with N cavity-entering runners 202, N is more than or equal to 1, N is an integer, and the sub-runners are used for providing a guiding basis for the subsequent mold cavity injection packing belt melt, meanwhile, due to the structural design and the quantity characteristics of the cavity-entering runners 202, the forming quantity of packing belt products is not an odd quantity limited by the traditional mold, so that the adaptability of the mold in packing belt product forming production is improved, and the quantity and the structure of the runners and the mold cavities required can be designed in advance when designing the mold; the main runner 101 is correspondingly and through-connected with the split runner 201, and is used for realizing natural connection and smooth circulation of packing belt melt among different runners; the space is reserved between every two adjacent cavity-entering runners 202, so that a reserved space is provided for the adaptive transformation of the die, and the die is moderately optimized and improved according to the encountered practical problems in practical use, so that the molding quality or the size requirement of the packing belt product is more satisfied; a die cavity is respectively and penetratingly arranged below the port of each cavity entering runner 202, the die cavity is used for carrying out constraint forming and guiding out on the melt of the packing belt passing through the cavity entering runner 202, and the bottom end of the die cavity is provided with an outlet 2061 used for carrying out forming and guiding out on the melt of the packing belt passing through the die cavity; the front die 1 and the rear die 2 are correspondingly spliced and fixed through a connecting component to form an upper die, and the upper die is formed through a convenient connecting and fixing structure of the cavity entering runner 202, namely, the integral structure of the processing die is formed; in order to further enable the formed packing belt products to have diversity, the bottom of the upper die is correspondingly connected with a die opening adjusting block 3, the die opening adjusting block 3 is provided with a die opening 301, the die opening 301 corresponds to the position of an outlet 2061, wherein the die opening adjusting block 3 is used as a carrier structure of the die opening 301 and is used for being conveniently connected with the upper die, so that convenience is provided for the subsequent convenient disassembly, assembly and replacement, the die opening 301 of the die opening adjusting block 3 corresponds to the position of an outlet 2061 of a die cavity and is used for restraining packing belt melt at the outlet 2061, extrusion molding of packing belt melt is further realized, and the packing belt melt is extruded and led out after the packing belt melt is molded into a product with the shape and the size set by the die opening 301; in addition, the shape of the die 301 can be set according to the actual use requirement, so that the compatible output of various size types in ultra-small PET packing belts can be met, and the die adjusting blocks 3 with different die 301 shape structures can be designed, so that the purpose can be achieved only by disassembling and replacing the die adjusting blocks 3 when the packing belt forming size needs to be changed;
specifically, as shown in fig. 1, 2 and 3, in this embodiment, the front mold 1 is provided with a longitudinal sprue 101 at the middle upper portion of the main body, the rear mold 2 is provided with a transverse sprue 201 at a height position corresponding to the main body, and when the front mold 1 and the rear mold 2 are spliced and fixed correspondingly, the longitudinal sprue 101 and the transverse sprue 201 realize natural connection and communication in a melt-converging manner, wherein the diameter of the longitudinal sprue 101 is larger than that of the transverse sprue 201, so that a pressure difference is formed between the strapping band melt flowing into the sprue 101 and the strapping band melt flowing through the sprue 201, and the pressure difference enables the strapping band melt in the sprue 101 to flow into the sprue 201 more smoothly and efficiently, thereby facilitating subsequent melt transfer and product molding; the N cavity inlet flow channels 202 are sequentially arranged and arranged at the bottom of the flow dividing channel 201 and are used for guiding out and forming N formed packing belt products; in this embodiment, N is 2, that is, two cavity-entering flow channels 202 are uniformly arranged at the bottom of the flow dividing channel 201, a larger space is reserved between two adjacent cavity-entering flow channels 202, so as to provide a reserved space for adaptive modification of a mold, for example, under the condition that the space between the front mold 1 and the rear mold 2 allows, the number of structures of the cavity-entering flow channels 202 in this embodiment can be modified from 2 to 3 or other specified numbers, so that the molding quality or various size requirements of the packing belt product can be more satisfied; the bottom of the front die 1 and the rear die 2 are correspondingly spliced and fixed to form an upper die through a convenient connecting component, the bottom of the upper die is connected with a die opening regulating block 3 through a quick-connection screw 8, the die opening regulating block 3 is provided with die openings 301, the positions of the die openings 301 and the outlet 2061 are corresponding, namely, under the condition that the design structure of the front die 1 and the rear die 2 is not changed and is firmly connected, the change of the molding size can be realized by only loosening the die opening regulating block 3 at the bottom of the quick-connection screw 8, in addition, the shape of the die openings 301 can be set according to the actual use requirement, for example, the shape of the die openings 301 in the embodiment is designed to be long, and each outlet 2061 is correspondingly provided with two die openings 301, so that four die openings 301 are formed, namely, the molding effect of leading out the melt from the first die opening to the second die opening is realized, and the four die opening is summarized by the four die openings 101 are realized, and the molding effect of leading out of the melt is summarized by the first die opening is realized, and the four die opening is summarized 101 is realized; in operation, the strapping tape melt flows from the main runner 101 into the sub-runner 201, enters the respective corresponding mold cavity through the two cavity-entering runners 202, and finally is guided out of the four strip-shaped strapping tapes through the outlet 2061 and the two-to-four mode mold opening 301; the width of the formed packing belt produced by the strip-shaped die 301 of the die adjusting block 3 in the embodiment is below 5mm, and the thickness is 0.2-0.7 mm, so that the ultra-small PET packing belt product is produced in the mode.
In some preferred embodiments, the upper die is provided with a locating bar 102 at its bottom end; the die orifice adjusting block 3 is in abutting contact with the positioning strip 102 and then is fixedly connected with the upper die.
In specific application, in practical application, adjustment and change between molding sizes are often needed, but the operation is often troublesome and has no convenience, so that the upper die is provided with the positioning strip 102 at the bottom end thereof, when the molding sizes of the packing belts are required to be adjusted and changed, the old die adjusting block 3 is only required to be detached, and then the new die adjusting block 3 is abutted against the positioning strip 102 and then is connected and fixed with the upper die, so that flexible change between the molding sizes of the packing belts is realized by the convenience of disassembly, assembly and replacement of the die adjusting block 3.
Specifically, in this embodiment, the positioning strip disposed on the upper mold is disposed at the bottom of the front mold 1, the positioning strip 102 is disposed parallel to the front surface of the rear mold 2, and the positioning strip 102 is disposed at the bottom end of the front mold 1 and is in a cuboid shape and protruding, so as to implement positioning and limiting of the die orifice adjusting block 3, so that when the die orifice adjusting block 3 is disassembled and replaced, the die orifice adjusting block 3 is only required to be correspondingly attached to the positioning strip 102 protruding in a cuboid shape, so that subsequent fixing can be performed, the operation is more convenient and efficient, and flexible conversion and change between the molding sizes of the packing belt are facilitated; wherein, the positioning strip with the cuboid-shaped bulge is also convenient for limiting a plurality of degrees of freedom, so that the die orifice adjusting block 3 is easy and direct in the adjusting and fixing process. In addition, the positioning strip can be provided with other shape structures, such as a column, but not limited to the column, and can also play a good role in positioning.
In some preferred embodiments, the length of the die 301 is less than the length of the outlets 2061, and the ratio of the number of die 301 to the number of outlets 2061 is one-to-one or many-to-one.
In a specific application, the length of the die 301 is set smaller than the length of the outlet 2061, so that extrusion and forming of the melt are realized by the die 301, that is, the length of the die 301 is smaller than the length of the outlet 2061, so that a pressure difference is formed between the die 301 and the outlet 2061, the melt at the outlet 2061 flows to the die 301 more smoothly and efficiently, and is led out by extrusion forming of the die 301, in the process, the melt flow is more sufficient and uniform, and the forming quality of the packing belt is further ensured, and in practical use, the ratio of the number of the die 301 to the number of the outlet 2061 is one-to-one or many-to-one, so that the practical production requirement when the number of the packing belt is expanded is met, and the limitation that the conventional die is not variable in use is broken through.
Specifically, in the present embodiment, the length of the die 301 is about one half of the length of the outlets 2061, that is, two die 301 are corresponding to each outlet 2061, the melt flows in from the two outlets 2061, four formed packing belts are extruded and guided out through the four die 301, and the expansion of the forming quantity of the packing belts in practical production and application is realized; in addition, the die opening 301 can be further expanded or contracted according to the actual use requirement, the shape of the die opening 301 is changed to realize the dimensional change of the formed packing belt, and the die opening adjusting blocks 3 with other die opening 301 shapes and numbers can be directly replaced, so that the convenient structural design of the positioning strip 102 is adopted, and the convenient change among the formed packing belt sizes is realized.
In some preferred embodiments, the rear mold 2 is correspondingly provided with an adjusting through hole 207 above the port of each cavity-entering runner 202; the adjusting through hole 207 is correspondingly provided with an adjusting screw 4.
Specifically, as shown in fig. 2, 3 and 4, in order to realize the control and adjustment of the melt flow, the rear mold 2 is correspondingly provided with an adjusting through hole 207 above the port of each cavity-entering runner 202, so as to form a basic structure for flow adjustment, the adjusting through hole 207 is correspondingly provided with an adjusting screw 4, and the adjusting screw 4 moves up and down in the adjusting through hole 207 to realize the obstruction and release of the flow, thereby realizing the flow adjustment of the melt, ensuring the sufficient and uniform flow of the melt entering the mold cavity, and further ensuring the molding quality of the packing belt. In this embodiment, the inner wall of the adjusting through hole 207 is provided with an internal thread, the adjusting screw 4 is connected with the adjusting through hole 207 through a thread, and the up-down change of the displacement is realized by rotating the adjusting screw 4, so that the adjusting screw passes through or blocks the melt flowing through the cavity-entering flow channel 202 above the cavity-entering flow channel 202, thereby playing a role in adjusting the flow.
In some preferred embodiments, the position of each adjusting through hole 207 and the position of the port of the corresponding cavity entering runner 202 are staggered.
Specifically, as shown in fig. 4, in the process of adjusting the flow, the excessive blocking effect can cause uneven flow distribution entering each mold cavity, so that the position of each adjusting through hole 207 and the corresponding port position of the cavity entering runner 202 are in staggered arrangement, and the cavity entering runner 202 is not completely blocked in the process of moving the adjusting screw 4 in the adjusting through hole 207, thereby ensuring sufficient and even melt flow in the cavity entering runner 202 and ensuring the forming quality of the subsequent packing belt. In this embodiment, the adjusting through hole 207 is located at a position deviated from the corresponding half body position of the cavity-entering runner 202, so that the adjusting screw 4 can not only adjust the flow of the melt, but also not completely block the flow of the melt, so that the flow is sufficient and uniform, and the forming quality of the packing belt is ensured.
In some preferred embodiments, the mold cavity includes a diversion cavity 203, a storage buffer cavity 205, a shaping cavity 206; the diversion cavity 203 is in an inverted funnel shape from top to bottom; the storage buffer cavity 205 is in an arc groove shape with a concave middle part from top to bottom; the molding cavity 206 has a rectangular parallelepiped groove shape with a uniform depth.
Specifically, in this embodiment, the flow guiding cavity 203 is in an inverted funnel shape from top to bottom, so as to form a good flow guiding and diffusing effect on the melt, since the flow of the main runner 101 into the sub-runner 201 and the melt of the cavity entering runner 202 is a pressure transition process, especially when the melt enters the cavity entering runner 202, the pressure is higher, a pressure releasing means is needed, under the effect of the inverted funnel-shaped flow guiding cavity 203, the melt flowing into the flow guiding cavity 203 is dispersed and diffused along with the height, the pressure is gradually reduced, and then the melt flowing into the flow guiding cavity 203 from the back is more smoothly and rapidly following the filling type, and is continuously guided and dispersed, so that the flow of the structure of the subsequent process is more sufficient and uniform; the storage buffer cavity 205 is in an arc groove shape with a concave middle part from top to bottom, so that the storage and buffering of the melt flowing out of the diversion cavity 203 are realized, wherein the structural characteristics of the concave middle part ensure that the storage buffer cavity has good melt storage capacity and is used for containing and continuously guiding out the melt, the structural characteristics of the arc groove ensure the change trend of flow pressure from high to low and then high, the melt is effectively stored and buffered, and meanwhile, the extrusion molding of the melt by the subsequent molding cavity 206 is facilitated, so that the molding quality of a packing belt is ensured and improved; the forming cavity 206 is in a rectangular groove shape with uniform depth, and is used for receiving the melt flowing in by the diversion cavity 203, realizing the homogenization of the pressure of the melt, leading out the melt in a stable state, and further being beneficial to improving the forming quality of the packing belt.
In some preferred embodiments, the depth of the diversion cavity 203 gradually decreases from top to bottom.
Specifically, in order to further adjust the melt flow pressure in the flow guiding cavity 203, the depth of the flow guiding cavity 203 gradually decreases from top to bottom, so that a relative melt flow pressurizing structure is formed, and the maximum pressure position of the melt flow is formed at the bottommost part of the flow guiding cavity 203, which is beneficial to more smoothly and efficiently extruding the melt at the bottom of the flow guiding cavity 203 into the storage buffer cavity 205, so that the storage buffer cavity 205 can quickly obtain the inflowing melt, store and buffer the inflowing melt, and thus, the sufficiency and uniformity of subsequent flow distribution are realized.
In some preferred embodiments, a connecting cavity 204 is connected between the diversion cavity 203 and the storage buffer cavity 205, and the depth of the connecting cavity 204 is the same as the depth of the forming cavity 206.
Specifically, in the present embodiment, a through connecting cavity 204 is further connected between the guiding cavity 203 and the storage buffer cavity 205, so as to accelerate the melt transfer speed between the guiding cavity 203 and the storage buffer cavity 205, that is, by setting the depth of the connecting cavity 204 and the depth of the forming cavity 206 to be the same, the melt flowing out of the guiding cavity 203 and flowing into the connecting cavity 204 can maintain a relatively stable pressure value, and then quickly flow into the storage buffer cavity 205, so as to improve the melt transfer efficiency between the guiding cavity 203 and the storage buffer cavity 205, and further enhance the sufficiency and uniformity of the subsequent melt flow.
In some preferred embodiments, the connection assembly comprises at least one first bolt 6 and at least two second bolts 7; at least one first bolt 6 is arranged in the central area of the upper part of the upper die; at least two second bolts 7 are symmetrically arranged at the left side and the right side of the middle lower part of the upper die; the diameter of the first bolt 6 is larger than the diameter of the second bolt 7.
Specifically, as shown in fig. 1, 2 and 4, in order to enhance the connection firmness between the front mold 1 and the rear mold 2, at least one first bolt 6 is provided in a central area of an upper portion of the upper mold for achieving a rough reinforcement between the front mold 1 and the rear mold 2, that is, an installation function for a foundation between the front mold 1 and the rear mold 2; at least two second bolts 7 are symmetrically arranged at the left and right sides of the middle lower part of the upper die and are used for realizing the fine reinforcement between the front die 1 and the rear die 2, namely realizing the stable connection effect between the front die 1 and the rear die 2 and ensuring the correspondence and stability of a runner in the upper die; the diameter of the first bolt 6 is larger than that of the second bolt 7, so that the rough reinforcement effect of the first bolt 6 and the fine reinforcement effect of the second bolt 7 are further enhanced. In this embodiment, the number of the first bolts 6 is two, the number of the second bolts 7 is eight, the front mold 1 and the rear mold 2 are provided with corresponding screw holes and embedded holes, the two first bolts 6 are uniformly arranged and embedded in the central area at the upper part of the upper mold, the eight second bolts 7 are symmetrically embedded in the left and right sides at the lower part of the upper mold, the diameter of the first bolts 6 is obviously larger than that of the second bolts 7, through the structure, coarse reinforcement and fine reinforcement between the front mold 1 and the rear mold 2 are realized, the working stability of the runner and the mold cavity inside the upper mold is ensured, and further the molding quality of packing belts is improved.
In some preferred embodiments, the upper die is heated using a spin beam; the top of the rear mould 2 is provided with a hanging ring 5.
Specifically, in the embodiment, the upper die is heated by adopting the spinning box, namely, a mounting hole for mounting a heating rod is not required to be designed, so that efficient and high-quality packing belt molding with various sizes can be realized, namely, the runner and the die cavity structure layout in the upper die cannot be interfered by the complicated heating mounting hole, thereby realizing full play of the characteristics of the runner and the die cavity layout in the upper die, and being aimed at improving the molding quality and the diversity of the packing belt; the top of the rear mould 2 is provided with a hanging ring 5, which is convenient for transferring the mould and other operations.
In some preferred embodiments, the bottom edge of the upper die is further provided with a limit bar, which is disposed perpendicular to the positioning bar 102.
Specifically, the limiting strip can be set to be a cuboid-shaped bulge at the bottom end of the upper die, can also be set to be a strip-shaped bulge with other regular shapes, is perpendicular to the positioning strip 102, can be in any crossed or far-away state structure, and is capable of realizing flexible transformation between molding sizes of the packing belt by enabling the die opening adjusting block 3 to be tightly attached to the direction of the positioning strip 102 and then moving and abutting along the direction of the limiting strip, namely positioning and limiting the die opening adjusting block 3 through a plurality of degrees of freedom, so that the convenience of disassembly and replacement of the die opening adjusting block 3 is further enhanced.
In some preferred embodiments, the flow directing chamber 203 is trapezoidal or frustoconical.
Specifically, the structure of the trapezoid-shaped or truncated cone-shaped flow guiding cavity 203 accords with the flow guiding and dispersing effects of the trapezoid-shaped or truncated cone-shaped flow guiding cavity 203 on the melt, the trapezoid-shaped or truncated cone-shaped flow guiding cavity 203 is in a dispersing trend state structure, the melt is guided and dredged by the flow guiding and dispersing effect due to the shape structure of the flow guiding cavity 203 when flowing through the flow guiding cavity 203, namely, the flow guiding cavity 203 effectively guides the melt flowing out of the cavity entering flow channel 202 and simultaneously achieves the dispersing effect inside the flow guiding cavity, and then the melt naturally generates the effect of accelerating the flow speed under the guiding and dispersing effects, so that the melt inside the flow guiding cavity 203 can quickly flow into the storage buffer cavity 205, and the melt transfer efficiency between the structures is improved.
According to the technical scheme, the die orifice type die capable of producing the ultra-small PET packing belt is characterized in that melt materials are injected through the main runner 101 of the front die 1, enter N cavity-entering runners 202 through the through shunt runners 201, and then the N formed packing belt products are led out through the die cavity and the die orifice adjusting block 3, so that the limit that the conventional die can only produce odd numbers of packing belt products is eliminated, the die orifice type die is suitable for production of various numbers of packing belt products, the die orifice adjusting block 3 can be changed into different shapes according to actual use requirements through the die orifice 301 structure existing in the die orifice type die, and flexible conversion of the packing belt between various sizes is further realized; the front die 1 and the rear die 2 are correspondingly spliced into the upper die, and the connecting die opening adjusting block 3 is additionally arranged at the bottom of the upper die, so that the quick disassembly and replacement between the upper die and the die opening adjusting block 3 are realized under the condition that the structural layout of the runner of the upper die and the structural design of the die cavity are not influenced, namely, the upper die consisting of the front die 1 and the rear die 2 is not required to be changed, the production and the molding of packing belts with various different sizes can be realized only by changing the die opening adjusting block 3, the disassembly and replacement convenience among the dies is greatly improved, and the molding quality of the packing belts is also indirectly protected because the upper die consisting of the front die 1 and the rear die 2 is not required to be changed; the positioning strip 102 is arranged at the bottom end of the upper die, so that the die opening adjusting block 3 is conveniently positioned and disassembled, namely, when the die opening adjusting block 3 needs to be installed, the die opening adjusting block 3 is only required to be abutted against the positioning strip 102, and is fixedly connected after the die opening adjusting block 3 and the die opening adjusting block are tightly attached, the structural design of the positioning strip 102 ensures the simplification of an installation structure, and also ensures the disassembly and assembly efficiency of the die opening adjusting block 3 and the convenience in replacement, thereby flexibly and quickly realizing the quick conversion or compatible production among various molding sizes of the packing belt; wherein, the length of the die opening 301 is smaller than the length of the outlet 2061, namely, when the melt of the packing belt material is guided out through the die cavity, the size of the die opening 301 of the die opening regulating block 3 is smaller than the size of the outlet 2061 of the die cavity, so that a relative pressure difference is generated between the outlet 2061 and the die opening 301, under the action of the pressure difference, the melt passes through the outlet 2061 and is extruded and formed by the die opening 301 to be guided out, the flow rate of the melt is ensured to be sufficient and uniform, thereby ensuring that the formed packing belt product has high quality, the ratio of the number of the die openings 301 to the number of the outlets 2061 is one to one, the expansion of the output number or size type of the formed packing belt is realized, and the output efficiency or diversity of the formed packing belt is improved; in order to facilitate further regulation and control of the flow, the rear mold 2 is correspondingly provided with a regulating through hole 207 above the port of each cavity-entering runner 202 for forming a flow regulating structural carrier, the regulating through holes 207 are correspondingly provided with regulating screws 4, namely, the regulating screws 4 are controlled to move up and down in the regulating through holes 207 by rotating the regulating screws 4, so that the port of the cavity-entering runner 202 is blocked when the rear mold moves downwards, and the port of the cavity-entering runner 202 is far away when the rear mold moves upwards, so that the flow is discharged through a space, and the effective regulation and control of the flow are achieved; the position of each adjusting through hole 207 and the port position of the corresponding cavity entering flow channel 202 are arranged in a staggered mode, so that the passing space of the flow is always reserved, and uneven or insufficient flow of the cavity entering flow channel 202 obtained due to too far distance from the main flow channel 101 at the edge is prevented. In order to further improve the molding quality of the packing belt, the diversion cavity 203 is in an inverted funnel shape from top to bottom and is used for forming effective diversion and dispersion effects on the melt, in particular, the inverted funnel-shaped structural design ensures that the melt with higher pressure can instantly obtain pressure diffusion and release after entering the cavity entering flow channel 202, so that the subsequent flow rate change is uniform and sufficient, the storage buffer cavity 205 is in an arc groove shape with a concave middle part from top to bottom and is used for storing and buffering the melt flowing out of the diversion cavity 203, the structure with the concave middle part ensures the strong storage capacity and continuous guiding out of the melt, the arc groove structure ensures the change trend of the flow rate pressure from high to low to high, and is beneficial to extrusion molding of the melt by the subsequent molding cavity 206 while the melt is effectively stored and buffered, so that the molding quality of the packing belt is improved; the forming cavity 206 is in a rectangular groove shape with uniform depth, so that the stable export of the melt of the packing belt is realized; the depth of the diversion cavity 203 gradually decreases from top to bottom, so as to increase the flow pressure, and enable the diversion cavity to enter the storage buffer cavity 205 more quickly, thereby improving the subsequent forming efficiency; a connecting cavity 204 is connected between the diversion cavity 203 and the storage buffer cavity 205, the depth of the connecting cavity 204 is the same as that of the forming cavity 206, and the connecting cavity is used for enabling the melt to rapidly increase the flow pressure, so that the melt between the diversion cavity 203 and the storage buffer cavity 205 is transferred more rapidly; the first bolt 6 with larger diameter is arranged in the central area of the upper part of the upper die and is used for roughly reinforcing the front die 1 and the rear die 2, namely, the favorable fixed installation is realized; the second bolts 7 with smaller diameters are symmetrically arranged at the left side and the right side of the middle lower part of the upper die and are used for realizing the precise reinforcement of the front die 1 and the rear die 2, namely ensuring the butt joint adaptation degree of a runner and a die cavity in the upper die formed by the front die 1 and the rear die 2, and further being beneficial to improving the forming quality of packing belts; the spinning box is adopted for heating the upper die, and a special design mounting hole is not required to be designed for a traditional heating rod heating mode, so that the interference of runner layout and die cavity structural design in the upper die is avoided, the molding quality of a packing belt is ensured, the hanging ring 5 arranged at the top end of the rear die 2 is also convenient for the whole taking and transferring of the rear die 2 and the upper die.
In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
What has been described above is merely some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (10)
1. The die opening type die capable of producing the ultra-small PET packing belt comprises a front die and a rear die, and is characterized in that the front die is provided with a main runner, the rear die is correspondingly provided with a sub runner, N cavity entering runners are sequentially arranged at the bottom of the sub runner, N is more than or equal to 1, and N is an integer;
the main flow channel is communicated with the shunt channel;
a space is reserved between every two adjacent cavity-entering flow passages;
a die cavity is respectively and penetratingly arranged below the port of each cavity entering runner, and the bottom end of the die cavity is provided with an outlet;
the front die and the rear die are correspondingly spliced and fixed through a connecting assembly to form an upper die, and the bottom of the upper die is correspondingly connected with a die orifice adjusting block;
the die opening adjusting block is provided with a die opening, and the die opening corresponds to the position of the outlet;
the shape of the die orifice is set according to actual use requirements;
and the packing belt melt flows into the split runner from the main runner, enters the corresponding die cavities through N cavity entering runners, and finally leads out N formed packing belts with set shapes from the die openings.
2. A die-opening die for producing ultra-small specification PET strapping tape according to claim 1, wherein the upper die is provided with a positioning strip at the bottom end thereof;
the die orifice adjusting block is in abutting contact with the positioning strip and then is fixedly connected with the upper die.
3. A die for producing ultra-small gauge PET strapping tape as in claim 1, wherein the length of the die is less than the length of the outlet;
the ratio of the number of die openings to the number of outlets is one-to-one or many-to-one.
4. The die-opening die for producing ultra-small PET packing belts according to claim 1, wherein the rear die is provided with an adjusting through hole correspondingly above the port of each cavity-entering runner;
the adjusting through holes are correspondingly provided with adjusting screws.
5. The die-opening die for producing ultra-small PET packing belts according to claim 4, wherein the position of each adjusting through hole and the position of the port of the corresponding cavity entering runner are arranged in a staggered manner.
6. A die-mouth die for producing ultra-small specification PET strapping tape according to claim 1, wherein the die cavity comprises a diversion cavity, a storage buffer cavity and a forming cavity;
the diversion cavity is in an inverted funnel shape from top to bottom;
the storage buffer cavity is in an arc groove shape with a concave middle part from top to bottom;
the forming cavity is in a cuboid groove shape with uniform depth.
7. The die set for producing ultra-small PET strapping tape according to claim 6, wherein the depth of the flow guiding cavity is gradually reduced from top to bottom.
8. The die-opening die for producing ultra-small PET packing belts according to claim 6, characterized in that a connecting cavity is connected between the diversion cavity and the storage buffer cavity in a penetrating way;
the depth of the connecting cavity is the same as the depth of the forming cavity.
9. A die for producing ultra-small gauge PET strapping tape as in claim 1, wherein said connecting assembly comprises at least one first bolt and at least two second bolts;
at least one first bolt is arranged in the central area of the upper part of the upper die;
at least two second bolts are symmetrically arranged at the left side and the right side of the middle lower part of the upper die;
the diameter of the first bolt is larger than the diameter of the second bolt.
10. A die-opening die for producing ultra-small PET strapping tape according to claim 1, wherein said upper die is heated by a spinning manifold;
and a hanging ring is arranged at the top end of the rear die.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310185456.9A CN116118149A (en) | 2023-03-01 | 2023-03-01 | Die-opening type die capable of producing ultra-small PET packing belt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310185456.9A CN116118149A (en) | 2023-03-01 | 2023-03-01 | Die-opening type die capable of producing ultra-small PET packing belt |
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| CN116118149A true CN116118149A (en) | 2023-05-16 |
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