Extrusion forming die and extrusion equipment
By designing a mold with a gradually decreasing extrusion space and a combined mandrel structure, the problems of indistinct texture, insufficient toughness, and material blockage in the production of thin-ringed plant-based meat products by existing molds have been solved, achieving high-quality and uniform output of the product.
Patent Information
- Application Number
- CN202423043376.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing extrusion molding dies are unable to produce thin, ring-shaped plant-based meat products with a tight texture, distinct structure, and sufficient toughness, and also suffer from problems such as material blockage, breakage, and uneven output.
An extrusion molding die was designed, including a first annular extrusion space and an equal-diameter annular extrusion space that gradually decrease along the material extrusion direction. Through the cooperation of the combined mandrel and the extrusion cylinder assembly, continuous extrusion and uniform conveying of the material are achieved. The cooling channel design is combined to control the material structure and temperature.
The production of products with continuous long fibers and filamentous structures has solved the problem of improving the taste of the products, and has avoided material blockage, breakage and uniform output during the extrusion process, thus improving product quality.
Smart Images
Figure CN223626883U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to extrusion molding processing technical field especially, relates to a kind of extrusion molding die and extrusion equipment. BACKGROUND
[0002] Plant meat mainly uses plant protein extracted from crops such as soybeans, peas and wheat as raw materials, and is often processed by extrusion to simulate the form, flavor and structure of meat products.
[0003] At present, the extruder is generally used to extrude the molten material of plant meat to make it have a fiber structure similar to animal meat and a soft and elastic taste. The extrusion molding die of the extruder is the main component of the extruder equipment, and the extrusion molding die is the last step to form plant meat products. The extrusion molding die in the prior art can only process thick sheet or block products. The outlet area of the extrusion molding die for producing thick sheet or block products is large, which can easily cause the extruded products to be soft, the organization to be not distinct, the toughness to be insufficient and the taste to be poor. The outlet area of the extrusion molding die for producing thin ring products is small, but it is prone to cause problems such as blocking, damage and uneven discharge, thereby causing the products to be unqualified.
[0004] Therefore, it is urgent to design an extrusion molding die that can produce thin ring products with compact organization, distinct structure and sufficient toughness, and can ensure that the problems such as blocking, damage and uneven discharge do not occur easily. UTILITY MODEL CONTENTS
[0005] The utility model aims to provide an extrusion molding die and extrusion equipment to produce thin ring products with continuous long fibers, filamentous organization and toughness, improve the taste of the products, and prevent blocking, damage and uneven discharge during extrusion, so as to improve the quality of the products.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The extrusion molding die comprises:
[0008] The extrusion barrel group extends along the extrusion direction of the material, and comprises a first variable-diameter barrel segment, the inner diameter of which gradually decreases along the extrusion direction of the material.
[0009] The combined mandrel is arranged in the inner cavity of the extrusion barrel group, and a first annular extrusion space is formed between the outer wall of the combined mandrel and the inner wall of the first variable-diameter barrel segment. The cross-sectional area of the first annular extrusion space gradually decreases along the extrusion direction of the material.
[0010] As a preferred, in addition, the extrusion barrel group comprises:
[0011] a constant cross-sectional area, and the first annular extrusion space and the constant-diameter annular extrusion space are sequentially communicated along the extrusion direction of the material.
[0012] Preferably, the extrusion barrel set further comprises:
[0013] a second variable-diameter barrel section in communication with the constant-diameter barrel section, a second annular extrusion space being formed between the outer wall of the combined mandrel and the inner wall of the second variable-diameter barrel section, the cross-sectional area of the second annular extrusion space gradually decreasing along the extrusion direction of the material, and the constant-diameter annular extrusion space and the second annular extrusion space being sequentially communicated along the extrusion direction of the material.
[0014] Preferably, along the extrusion direction of the material, the combined mandrel comprises a constant-diameter mandrel and a variable-diameter mandrel connected in sequence, the variable-diameter mandrel comprising a transition section connected with the constant-diameter mandrel, the outer diameter of the transition section gradually increasing along the extrusion direction of the material, the outer diameter of the end of the transition section connected with the constant-diameter mandrel being the same as that of the constant-diameter mandrel, the constant-diameter mandrel being arranged in the first variable-diameter barrel section, the constant-diameter barrel section, and part of the second variable-diameter barrel section, and the variable-diameter mandrel being arranged in the second variable-diameter barrel section.
[0015] Preferably, the variable-diameter mandrel further comprises a constant-diameter shaft section, the transition section and the constant-diameter shaft section being connected in sequence along the extrusion direction of the material.
[0016] Preferably, the inside of the extrusion barrel set is provided with a plurality of cooling channels for the flow of cooling medium, the cooling channels extending along the extrusion direction of the material, and the cooling channels being arranged around the combined mandrel.
[0017] Preferably, the extrusion molding die further comprises:
[0018] a connecting assembly in communication with the feed end of the extrusion barrel set, one end of the combined mandrel extending out of the feed end of the extrusion barrel set being provided with a flow dividing cone, the flow dividing cone being located inside the connecting assembly, the outer side surface of the flow dividing cone being provided with a flow dividing surface, the distance between the flow dividing surface and the axis of the flow dividing cone gradually increasing along the extrusion direction of the material, and the inner cavity of the connecting assembly and the flow dividing surface forming a feeding cavity in communication with the first annular extrusion space.
[0019] Preferably, the connecting assembly comprises:
[0020] The converging body is internally provided with a docking hole, the inner diameter of the docking hole gradually decreases along the extrusion direction of the material, and the flow dividing cone extends into the docking hole.
[0021] As preferred, the connecting assembly further comprises:
[0022] A mounting sleeve, a first end of the mounting sleeve is fixedly connected and conductive with the converging body, a second end of the mounting sleeve is fixedly connected and conductive with the feeding end of the extrusion barrel group, and the flow dividing cone is arranged in the mounting sleeve; and
[0023] Two limiting members, the first ends of the two limiting members are fixedly connected with one of the outer peripheral wall of the combined mandrel and the inner peripheral wall of the mounting sleeve, and the second ends of the two limiting members are slidingly connected with the other one along the vertical direction.
[0024] The extrusion equipment comprises the extrusion forming die, and the first annular extrusion space is communicated with a discharge port of an extrusion feeding mechanism.
[0025] The extrusion forming die has the advantages that:
[0026] The extrusion forming die comprises a combined mandrel and an extrusion barrel group, the extrusion barrel group comprises a first variable-diameter barrel section, the inner diameter of the first variable-diameter barrel section gradually decreases along the extrusion direction of the material, the outer wall of the combined mandrel and the inner wall of the first variable-diameter barrel section form a first annular extrusion space, and the cross-sectional area of the first annular extrusion space gradually decreases along the extrusion direction of the material.
[0027] The extrusion equipment comprises the extrusion forming die, and the first annular extrusion space is communicated with a discharge port of an extrusion feeding mechanism. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 is the isometric view of the extrusion forming die provided by the utility model embodiment;
[0029] Figure 2 is the cross section of the extrusion molding die provided by the embodiment of the utility model Figure 1 ;
[0030] Figure 3 is the cross section of the extrusion molding die provided by the embodiment of the utility model Figure 2 ;
[0031] Figure 4 is the schematic diagram of the combined mandrel of the extrusion molding die provided by the embodiment of the utility model
[0032] Figure 5 is Figure 4 the local enlarged view of A in the
[0033] Figure 6 is the cross section of the connecting assembly of the extrusion molding die provided by the embodiment of the utility model
[0034] Figure 7 is the schematic diagram of the flow dividing cone of the extrusion molding die provided by the embodiment of the utility model
[0035] Figure 8 is the isometric view of the mounting sleeve of the extrusion molding die provided by the embodiment of the utility model
[0036] Figure 9 is the front view of the mounting sleeve of the extrusion molding die provided by the embodiment of the utility model.
[0037] in the figure:
[0038] 1, extrusion cylinder group;11, first variable diameter cylinder section;111, first section extrusion cylinder;112, second section extrusion cylinder;12, equal diameter cylinder section;13, second variable diameter cylinder section;
[0039] 2, combined mandrel;21, equal diameter mandrel;211, first section mandrel;212, second section mandrel;22, variable diameter mandrel;221, transition section;222, equal diameter shaft section;23, flow dividing cone;231, flow dividing surface;
[0040] 31, cooling channel;32, liquid outlet;33, liquid inlet;
[0041] 41, first annular extrusion space;42, equal diameter annular extrusion space;43, second annular extrusion space;44, feeding cavity;
[0042] 5, connecting assembly;51, flow converging body;511, butt joint hole;52, mounting sleeve;521, connecting cylinder;522, mounting cylinder;53, limiting piece. DETAILED DESCRIPTION
[0043] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model and not limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.
[0044] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0045] In the utility model, unless explicitly defined and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0046] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0047] At present, the molten material of plant meat is generally extruded by an extruder, so that it has a fiber structure similar to animal meat and a soft and flexible taste. The extrusion forming die of the extruder is the main part of the extruder equipment, and the extrusion forming die is the last step of forming the plant meat product. The extrusion forming die in the prior art can only process thick sheet or block products, and the outlet area of the extrusion forming die for producing thick sheet or block products is large, which can easily cause the extruded product to be soft, the organization to be not distinct, the toughness to be insufficient and the taste to be poor. The outlet area of the extrusion forming die for producing thin ring products is small, but the problems of blocking, damage and uneven discharging are prone to occur, thereby causing the product to be unqualified.
[0048] To solve the above problems, the present embodiment provides an extrusion molding die, as shown in Figures 1-3 The present embodiment provides an extrusion molding die, which comprises an extrusion barrel group 1 and a combined mandrel 2. The extrusion barrel group 1 extends along the extrusion direction of the material, and comprises a first variable-diameter barrel section 11, the inner diameter of which gradually decreases along the extrusion direction of the material. The combined mandrel 2 is arranged in the inner cavity of the extrusion barrel group 1, and the outer wall of the combined mandrel 2 and the inner wall of the first variable-diameter barrel section 11 form a first annular extrusion space 41, the cross-sectional area of which gradually decreases along the extrusion direction of the material. The extrusion molding die provided by the present embodiment can produce thin ring-shaped products with continuous long fibers, filamentous structure and toughness, and improve the taste of the products, by arranging the first annular extrusion space 41 with a cross-sectional area gradually decreasing along the extrusion direction of the material, so that the internal structure of the material is continuously intertwined.
[0049] Optionally, as shown in Figure 3 In the present embodiment, the combined mandrel 2 is a cylindrical part. The above arrangement makes the extrusion molding die lighter and saves costs. In other embodiments, the combined mandrel 2 can be a solid shaft. The solid shaft has higher strength, so that the extrusion molding die is less likely to deform.
[0050] Optionally, as shown in Figure 3 In the present embodiment, the extrusion barrel group 1 comprises a plurality of extrusion barrels connected in sequence, the adjacent two extrusion barrels are detachably connected, and the combined mandrel 2 is arranged in each extrusion barrel. Optionally, in the present embodiment, the extrusion barrel group 1 comprises four extrusion barrels connected in sequence. The above arrangement facilitates the replacement and repair of the damaged part of the extrusion barrel group 1, without the need to replace the entire extrusion barrel group 1, thereby reducing costs. In other embodiments, the extrusion barrel group 1 can be configured to be integrally formed or a plurality of extrusion barrels connected in sequence according to requirements.
[0051] Optionally, in the present embodiment, the length H of each extrusion barrel is 300 mm, and in other embodiments, the length of each extrusion barrel is arranged according to requirements.
[0052] Optionally, in the present embodiment, the first variable-diameter barrel section 11 comprises two extrusion barrels, which are a first extrusion barrel section 111 and a second extrusion barrel section 112. In other embodiments, the first variable-diameter barrel section 11 can be arranged as one extrusion barrel or a plurality of extrusion barrels according to requirements.
[0053] Optionally, in the embodiment, the inner diameter of the first variable-diameter barrel section 11 decreases from 115 mm to 105 mm in the extrusion direction of the material, wherein the inner diameter of the first barrel section 111 decreases from 115 mm to 110 mm, and the inner diameter of the second barrel section 112 decreases from 110 mm to 105 mm.
[0054] Further, as shown in Figure 2 and Figure 3 , the extrusion barrel group 1 further comprises a constant-diameter barrel section 12, which is in communication with the second barrel section 112 in the first variable-diameter barrel section 11, and the outer wall of the combined mandrel 2 and the inner wall of the constant-diameter barrel section 12 form a constant-diameter annular extrusion space 42, the cross-sectional area of the constant-diameter annular extrusion space 42 is constant, and in the extrusion direction of the material, the first annular extrusion space 41 and the constant-diameter annular extrusion space 42 are sequentially communicated. When the material flows through the constant-diameter annular extrusion space 42 from the first annular extrusion space 41, the material extruded by the first annular extrusion space 41 maintains its long fiber and filament structure in the constant-diameter annular extrusion space 42, making the structure and organization of the material more stable before extrusion.
[0055] Optionally, in the embodiment, the inner diameter of the constant-diameter barrel section 12 is 105 mm, and in other embodiments, the inner diameter of the constant-diameter barrel section 12 is set according to the inner diameter of the first variable-diameter barrel section 11, as long as it can be smoothly connected with the inner diameter of the first variable-diameter barrel section 11.
[0056] Optionally, in the embodiment, the constant-diameter barrel section 12 is composed of one barrel section, and in other embodiments, the constant-diameter barrel section 12 can be composed of a plurality of barrels spliced together.
[0057] Further, as shown in Figure 2 and Figure 3 , the extrusion barrel group 1 further comprises a second variable-diameter barrel section 13, which is in communication with the constant-diameter barrel section 12, and the outer wall of the combined mandrel 2 and the inner wall of the second variable-diameter barrel section 13 form a second annular extrusion space 43, the cross-sectional area of the second annular extrusion space 43 gradually decreases in the extrusion direction of the material, and in the extrusion direction of the material, the constant-diameter annular extrusion space 42 and the second annular extrusion space 43 are sequentially communicated. The above arrangement allows the material to sequentially pass through the first annular extrusion space 41 and the constant-diameter annular extrusion space 42 into the second annular extrusion space 43, so that the material that has formed a long fiber and filament structure is further extruded in the second annular extrusion space 43, further improving the toughness and taste of the product. In addition, since the cross-sectional area of the second annular extrusion space 43 gradually decreases, the extrusion pressure can be established before the material is extruded, which is beneficial to the extrusion of the material.
[0058] Optionally, in the embodiment, the second variable-diameter barrel section 13 is composed of one barrel section, and in other embodiments, the second variable-diameter barrel section 13 can be composed of a plurality of barrels spliced together.
[0059] Optionally, such as Figure 3 As shown, in this embodiment, along the extrusion direction of the material, the cone angle of the inner wall of the second variable diameter section 13 is smaller than the cone angle of the inner wall of the first variable diameter section 11. This results in the reduction of the cross-sectional area of the second annular extrusion space 43 being less than the reduction of the cross-sectional area of the first annular extrusion space 41. Under the premise of ensuring that the material is extruded smoothly, the second annular extrusion space 43 further extrudes the material before the material is extruded, so that the material maintains the stability of a continuous long fiber and filamentous structure, which can improve the reliability of the extruded product.
[0060] Optionally, along the extrusion direction of the material, the inner diameter of the second variable diameter section 13 is reduced from 105mm to 102mm. In other embodiments, the cone angle of the inner wall of the second variable diameter section 13 can be set according to requirements as the material extrusion direction varies.
[0061] Furthermore, such as Figures 3-5 As shown, along the extrusion direction of the material, the combined mandrel 2 includes a constant-diameter mandrel 21 and a variable-diameter mandrel 22 connected in sequence. The variable-diameter mandrel 22 includes a transition section 221 connected to the constant-diameter mandrel 21. Along the extrusion direction of the material, the outer diameter of the transition section 221 gradually increases. The outer diameter of the end of the transition section 221 connected to the constant-diameter mandrel 21 is the same. The constant-diameter mandrel 21 passes through the first variable-diameter section 11, the constant-diameter section 12, and part of the second variable-diameter section 13. The variable-diameter mandrel 22 passes through the second variable-diameter section 13. The above arrangement makes the change of the outer diameter of the constant-diameter mandrel 21 and the variable-diameter mandrel 22 stable and smooth, so that the extrusion of the material is smooth and ensures the stability of the long fiber and filamentous structure of the material.
[0062] Optionally, such as Figure 5 As shown, in this embodiment, the angle α between the transition section 221 and the axis of the variable diameter mandrel 22 along the extrusion direction of the material is 5°-10°. Optionally, the angle α between the transition section 221 and the axis of the variable diameter mandrel 22 can be 5°, 7°, 8°, 9°, or 10°, and is preferably 9° in this embodiment. The aforementioned transition section 221 cooperates with the inner wall of the second variable diameter cylinder section 13, further increasing the extrusion pressure of the second annular extrusion space 43 on the material, facilitating the extrusion of the material. In other embodiments, the angle between the transition section 221 and the axis of the variable diameter mandrel 22 can be adjusted according to the diameter of the combined mandrel 2, as long as the extrusion pressure of the material is established.
[0063] Optionally, in this embodiment, the equal diameter mandrel 21 and the variable diameter mandrel 22 are connected by threads. In other embodiments, the connection method of the equal diameter mandrel 21 and the variable diameter mandrel 22 can be plug-in, welding or other methods that enable the equal diameter mandrel 21 and the variable diameter mandrel 22 to be coaxially connected, or it can be an integrally formed form.
[0064] Optionally, in this embodiment, the outer diameter of the equal diameter mandrel 21 is 97mm. In other embodiments, the outer diameter of the equal diameter mandrel 21 is set according to process requirements.
[0065] Optionally, such as Figure 3 As shown, in this embodiment, the equal-diameter mandrel 21 includes a first mandrel 211 and a second mandrel 212, which are connected by threads. The second mandrel 212 is connected to the variable-diameter mandrel 22. In other embodiments, the first mandrel 211 and the second mandrel 212 can be connected by insertion, welding, or other methods that enable the first mandrel 211 and the second mandrel 212 to be coaxially connected, or they can be integrally formed.
[0066] Furthermore, such as Figure 2 As shown, the extrusion cylinder assembly 1 has multiple independent cooling channels 31 for the flow of cooling medium. The temperature of the cooling channels 31 is controlled in segments. The cooling channels 31 extend along the extrusion direction of the material and are arranged around the combined mandrel 2. The cooling channels 31 facilitate the cooling of the material.
[0067] Specifically, the outer wall of the extrusion cylinder assembly 1 is provided with a liquid inlet 32 and a liquid outlet 33, both of which are connected to the cooling channel 31. The liquid inlet 32 and the liquid outlet 33 are arranged opposite each other along the radial direction of the extrusion cylinder assembly 1. When cooling the material, the low-temperature cooling medium flows into the cooling channel 31 through the liquid inlet 32 until the cooling channel 31 is filled, thereby cooling the extrusion cylinder assembly 1 and indirectly cooling the material. After heat exchange with the material, the medium is discharged through the liquid outlet 33. After heat exchange with an external circulating heat exchanger, the above process is repeated, thereby achieving the cooling of the material.
[0068] Optionally, in this embodiment, water is used as the cooling medium. In other embodiments, other cooling media, such as oil or water-soluble coolant, can be used as needed.
[0069] Optionally, such as Figure 2 As shown, in this embodiment, the cooling channel 31 is cylindrical. In other embodiments, the cooling channel 31 can be configured in other forms as needed, such as a spiral shape. The spiral structure of the cooling channel 31 increases the contact area between the cooling medium and the extrusion cylinder assembly 1, thereby improving the cooling effect.
[0070] Optionally, such as Figure 2 and Figure 3As shown, in the embodiment, each extrusion cylinder is provided with a cooling channel 31, and the outer wall of each extrusion cylinder is provided with a liquid inlet 32 and a liquid outlet 33 communicating with the cooling channel 31, so that the entire extrusion cylinder group 1 can be adjusted in sections. Optionally, in the embodiment, the cooling channels 31 are divided into two groups, the cooling channels 31 of the first section extrusion cylinder 111 and the second section extrusion cylinder 112 are the first group, which are controlled by one temperature control device. The cooling channels 31 of the constant diameter cylinder section 12 and the second variable diameter cylinder section 13 are the second group, which are controlled by another temperature control device. In other embodiments, the cooling channels 31 can be grouped according to needs.
[0071] Optionally, in the embodiment, the cooling temperature of the first group is higher than that of the second group, which can realize step-by-step cooling of the material and is beneficial to the shaping of the material.
[0072] Optionally, in the embodiment, the cooling temperature of the first group is set to 125°-130°, and the cooling temperature of the second group is set to 120°-125°, which is beneficial to the formation of long fibers and filamentous tissues, and at the same time, the material will evaporate and dehydrate to form a fluffy and porous structure when extruded at this temperature range. In other embodiments, the cooling temperature can be set according to needs.
[0073] Further, as shown in Figure 4 and Figure 5 The variable diameter mandrel 22 further includes a constant diameter shaft section 222, which is connected to the transition section 221 in sequence along the extrusion direction of the material. Through the above arrangement, the constant diameter shaft section 222 with a larger outer diameter is located at the end of the extrusion forming die for extruding, which can meet the thickness requirement of the thin ring-shaped product.
[0074] Optionally, in the embodiment, the outer diameter of the constant diameter shaft section 222 is 100.4mm, and the outer diameter thereof and the inner diameter of the second variable diameter cylinder section 13 form a ring-shaped space with a thickness of 0.8mm at the end of the second annular extrusion space 43, which ensures the set extrusion thickness of the material. In other embodiments, the outer diameter of the constant diameter shaft section 222 can be set according to the set extrusion thickness of the material.
[0075] Optionally, in the embodiment, the length h of the constant diameter shaft section 222 is 1mm, and in other embodiments, the length of the constant diameter shaft section 222 can be set according to needs.
[0076] Further, as shown in Figure 6 and Figure 7As shown, the extrusion molding die further comprises a connecting assembly 5 which is in communication with the feeding end of the extrusion cylinder group 1, the end of the combined mandrel 2 extending out of the feeding end of the extrusion cylinder group 1 is provided with a flow dividing cone 23 which is located inside the connecting assembly 5, the outer side of the flow dividing cone 23 is provided with a flow dividing surface 231, the distance between the flow dividing surface 231 and the axis of the flow dividing cone 23 gradually increases along the extrusion direction of the material, and the inner cavity of the connecting assembly 5 and the flow dividing surface 231 form a feeding cavity 44 which is in communication with the first annular extrusion space 41. During feeding, the extrusion feeding mechanism extrudes the material which flows into the first annular extrusion space 41 after passing through the inner cavity of the connecting assembly 5 and the feeding cavity 44. In the above process, the flow dividing cone 23 guides and divides the material extruded by the extrusion feeding mechanism, so that the material is uniformly distributed in the feeding cavity 44, the material flows into the first annular extrusion space 41 at the same flow rate, which is convenient for forming a ring structure and preventing waste of the material during extrusion.
[0077] Optionally, in the present embodiment, the included angle b between the flow dividing surface 231 and the axis of the flow dividing cone 23 is 15°-25°, preferably 22.5°. In other embodiments, the included angle between the flow dividing surface 231 and the axis of the flow dividing cone 23 can be set according to requirements, as long as the material at the feeding end can be divided.
[0078] Further, as shown, Figure 6 the connecting assembly 5 comprises a flow collecting body 51, the first end of the flow collecting body 51 is in communication with the extrusion feeding mechanism, the inside of the flow collecting body 51 is provided with a butt joint hole 511, the inner diameter of the butt joint hole 511 gradually decreases along the extrusion direction of the material, the space formed by the butt joint hole 511 gradually decreases, and the flow dividing cone 23 can extend into the butt joint hole 511. The above arrangement can ensure that more material at the feeding end enters the butt joint hole 511, and ensure that the material can fully enter the feeding cavity 44 formed by the inner cavity of the connecting assembly 5 and the flow dividing surface 231 and smoothly flow into the first annular extrusion space 41, realizing the continuity of material flow and preventing dead material. Preferably, in the present embodiment, the butt joint hole 511 at the first end of the flow collecting body 51 is provided as a special-shaped hole matched with the discharge hole of the double-screw extruder, and in other embodiments, the butt joint hole 511 at the first end of the flow collecting body 51 can be set according to the shape of the discharge hole of the extrusion feeding mechanism.
[0079] Further, as shown, Figure 8 and Figure 9As shown, the connecting assembly 5 further comprises a mounting sleeve 52 and two limiters 53. The first end of the mounting sleeve 52 is fixedly connected with the current collector 51 and in conduction, the second end of the mounting sleeve 52 is fixedly connected with the feeding end of the extrusion cylinder group 1 and in conduction, and the shunt cone 23 is arranged in the mounting sleeve 52. The two limiters 53 are arranged in opposite directions along the vertical direction. One of the outer peripheral wall of the combined mandrel 2 and the inner peripheral wall of the mounting sleeve 52 is fixedly connected with the first end of the two limiters 53, and the other is slidably connected with the second end of the two limiters 53 along the vertical direction. When the material enters the first annular extrusion space 41 through the feeding cavity 44, the material forms a cylindrical structure around the outer wall of the combined mandrel 2. When the material is extruded in the first annular extrusion space 41, the combined mandrel 2 moves along the vertical direction under the extrusion of the material relative to the mounting sleeve 52. This movement changes the cross-sectional area of the first annular extrusion space 41, which in turn causes the pressure of the material on both sides of the combined mandrel 2 to change, and the pressure of the material on the lower side of the first annular extrusion space 41 to increase. This increased pressure acts on the combined mandrel 2 and drives it to move upward along the vertical direction until the combined mandrel 2 is coaxial with the extrusion cylinder group 1. Therefore, by arranging the limiters 53 to slidably connect the combined mandrel 2 and the mounting sleeve 52 along the vertical direction, the displacement of the combined mandrel 2 in the horizontal direction is limited, and the combined mandrel 2 is coaxial with the extrusion cylinder group 1 under the extrusion of the material, achieving self-balancing of the combined mandrel 2. In addition, the arrangement of the limiters 53 achieves the connection of the combined mandrel 2 and the mounting sleeve 52, and the combined mandrel 2 will not come out of the mounting sleeve 52, ensuring the structural integrity of the extrusion molding die.
[0080] Alternatively, in this embodiment, the outer peripheral wall of the combined mandrel 2 is fixedly connected with the first end of the two limiters 53, and the mounting sleeve 52 is slidably connected with the second end of the two limiters 53 along the vertical direction, making the structure stable. In other embodiments, the inner peripheral wall of the mounting sleeve 52 is fixedly connected with the first end of the two limiters 53, and the outer peripheral wall of the combined mandrel 2 is slidably connected with the second end of the two limiters 53 along the vertical direction. It should be noted that in this embodiment, the first section of the mandrel 211 is fixedly connected with the first end of the two limiters 53.
[0081] Alternatively, in this embodiment, the limiters 53 are bolts fixed on the first section of the mandrel 211, and the mounting sleeve 52 is provided with threaded holes corresponding to the bolts to allow the bolts to slide along the vertical direction between adjacent two threads of the threaded holes, achieving the limitation of the vertical movement of the limiters 53 and avoiding the bottom wall of the combined mandrel 2 from being attached to the inner bottom wall of the extrusion cylinder group 1. In addition, the arrangement of the bolts is simple and easy to operate. In other embodiments, the limiters 53 are arranged in other structures according to requirements, such as pins or springs, etc.
[0082] It should be noted that the inner peripheral wall of the mounting sleeve 52 and the flow distribution surface 231 of the outer side surface of the flow distribution cone 23 form the feeding cavity 44. In addition, it should be noted that the above arrangement makes the connecting assembly 5 composed of the detachable flow collector 51 and the mounting sleeve 52, which is convenient for maintenance and replacement. In other embodiments, the connecting assembly 5 can be configured as an integral molding according to requirements.
[0083] Optionally, in the embodiment, the mounting sleeve 52 comprises a connecting cylinder 521 and a mounting cylinder 522, the mounting cylinder 522 is fixedly connected and communicated with the feeding end of the extrusion cylinder set 1, the first end of the connecting cylinder 521 is connected with the flow collector 51, and the second end of the connecting cylinder 521 is connected with the mounting cylinder 522. It should be noted that, in the embodiment, the mounting cylinder 522 is slidably connected with the second ends of the two limit members 53 in the vertical direction. In other embodiments, the mounting sleeve 52 can be configured as a multi-part detachable connection according to requirements, or can be configured as an integral molding.
[0084] The embodiment also provides an extrusion device, which mainly refers to a double-screw extruder, and the extrusion device comprises the extrusion feeding mechanism and the above-mentioned extrusion molding die, and the first annular extrusion space 41 of the extrusion molding die is in communication with the discharge port of the extrusion feeding mechanism. The extrusion device provided by the embodiment can produce thin annular products with continuous long fibers, filamentous tissues and toughness by applying the above-mentioned extrusion molding die, improves the taste of the products, and is not easy to cause blockage and damage during extrusion, and the discharge is uniform, thereby improving the quality of the products.
[0085] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. An extrusion molding die characterized by, The extrusion die set (1) comprises a first variable-diameter barrel section (11) whose inner diameter gradually decreases in the extrusion direction of the material; a combined mandrel (2) arranged in the inner cavity of the extrusion die set (1), and an outer wall of the combined mandrel (2) and an inner wall of the first variable-diameter barrel section (11) form a first annular extrusion space (41) whose cross-sectional area gradually decreases in the extrusion direction of the material. The extrusion die set (1) further comprises: a constant-diameter barrel section (12) communicating with the first variable-diameter barrel section (11), and an outer wall of the combined mandrel (2) and an inner wall of the constant-diameter barrel section (12) form a constant-diameter annular extrusion space (42) whose cross-sectional area is constant, and the first annular extrusion space (41) and the constant-diameter annular extrusion space (42) are sequentially communicated in the extrusion direction of the material.
2. The extrusion molding die according to claim 1, characterized by The extrusion die set (1) further comprises: a second variable-diameter barrel section (13) communicating with the constant-diameter barrel section (12), and an outer wall of the combined mandrel (2) and an inner wall of the second variable-diameter barrel section (13) form a second annular extrusion space (43) whose cross-sectional area gradually decreases in the extrusion direction of the material, and the constant-diameter annular extrusion space (42) and the second annular extrusion space (43) are sequentially communicated in the extrusion direction of the material.
3. The extrusion molding die according to claim 2, characterized by In the extrusion direction of the material, the combined mandrel (2) comprises a constant-diameter mandrel (21) and a variable-diameter mandrel (22) connected in sequence, the variable-diameter mandrel (22) comprises a transition section (221) connected with the constant-diameter mandrel (21), an outer diameter of the transition section (221) gradually increases in the extrusion direction of the material, an outer diameter of one end of the transition section (221) connected with the constant-diameter mandrel (21) is the same as that of the constant-diameter mandrel (21), the constant-diameter mandrel (21) is arranged in the first variable-diameter barrel section (11), the constant-diameter barrel section (12), and part of the second variable-diameter barrel section (13), and the variable-diameter mandrel (22) is arranged in the second variable-diameter barrel section (13). The variable-diameter mandrel (22) further comprises a constant-diameter shaft section (222), and the transition section (221) and the constant-diameter shaft section (222) are sequentially connected in the extrusion direction of the material.
4. The extrusion molding die according to claim 3, characterized by The extrusion die set (1) is internally provided with a plurality of cooling channels (31) for flowing cooling medium, the cooling channels (31) extend in the extrusion direction of the material, and the cooling channels (31) are arranged around the combined mandrel (2).
5. The extrusion molding die according to claim 4, wherein The extrusion die set (1) further comprises:
6. The extrusion molding die according to any one of claims 1 to 5, characterized by 7. The extrusion molding die according to any one of claims 1 to 5, characterized by A connecting assembly (5) is in communication with the feeding end of the extrusion barrel group (1), an end of the combined mandrel (2) extending out of the feeding end of the extrusion barrel group (1) is provided with a flow distribution cone (23), the flow distribution cone (23) is located inside the connecting assembly (5), the outer side of the flow distribution cone (23) is provided with a flow distribution surface (231), the distance between the flow distribution surface (231) and the axis of the flow distribution cone (23) gradually increases along the extrusion direction of the material, and the inner cavity of the connecting assembly (5) and the flow distribution surface (231) form a feeding cavity (44) in communication with the first annular extrusion space (41).
8. The extrusion molding die according to claim 7, wherein The connecting assembly (5) comprises: A flow collecting body (51) is internally provided with a butt joint hole (511), the inner diameter of the butt joint hole (511) gradually decreases along the extrusion direction of the material, and the flow distribution cone (23) extends into the butt joint hole (511).
9. The extrusion molding die according to claim 8, wherein The connecting assembly (5) further comprises: A mounting sleeve (52) is fixedly connected and conductive with the flow collecting body (51) at the first end, is fixedly connected and conductive with the feeding end of the extrusion barrel group (1) at the second end, and the flow distribution cone (23) is arranged in the mounting sleeve (52); and Two limiting members (53) are arranged in vertical direction and spaced apart, one of the outer peripheral wall of the combined mandrel (2) and the inner peripheral wall of the mounting sleeve (52) is fixedly connected with the first end of the two limiting members (53), and the other is slidingly connected with the second end of the two limiting members (53) in the vertical direction.
10. Extrusion apparatus, characterized in that The extrusion molding die comprises an extrusion feeding mechanism and any one of claims 1-9, and the first annular extrusion space (41) is in communication with the discharge port of the extrusion feeding mechanism.