Profile extrusion die

Abstract

The utility model discloses a profile extrusion die, which is characterized in that a hollow area is arranged on a product corresponding to the extrusion die, and an opening communicated with the hollow area is arranged on the surface of the product; comprising an upper die and a lower die which are in positioning connection, and a forming cavity is jointly formed in the upper die and the lower die; the forming cavity is used for guiding materials to move in the extrusion direction from the upper die to the lower die and conducting extrusion forming to form products. The forming cavity is sequentially divided into a feeding cavity, a transition cavity and a discharging cavity in the extrusion direction of the section bar, and each cavity has a set length in the extrusion direction. The supporting piece is matched with the cantilever, so that the cantilever can be shielded by the supporting piece, the pressure of the section bar is prevented from being directly transmitted to the cantilever of the lower die, and the production efficiency of the section bar is improved. Therefore, the deformation probability of the cantilever is reduced. And secondly, the protection design of the cantilever has universality, and is suitable for all molds with large cantilevers on the lower molds.

Description

TECHNICAL FIELD

[0001] The utility model relates to extrusion die technical field, concretely relates to a section bar extrusion die. BACKGROUND

[0002] Aluminum has good corrosion resistance and weather resistance, good plasticity and processing performance, good thermal conductivity and electrical conductivity, good low-temperature performance, and good mechanical properties. In addition, the high-temperature performance, forming performance, riveting performance, gluing performance, and surface treatment performance of aluminum materials are also good. Therefore, aluminum materials have been widely used in aerospace, marine, aviation, automobile, transportation, bridge, building, and other fields.

[0003] In order to meet the huge market demand, sometimes an extrusion die is used to extrude aluminum profiles into various shapes in the prior art, such as a profile extrusion die with three outputs with application number 202321608371.9, which arranges three forming cavities in inverted "pin" shape, i.e., two forming cavities are arranged on the left and right sides of the upper part of the die, and the remaining one forming cavity is arranged at the lower part of the die. When the initial position is reached, the centers of the cross-sectional shapes of the three forming cavities are located on the same circle with the center of the die as the center, ensuring that the flow rate of aluminum entering the three forming cavities is consistent before the die sinks. After long-term use, if the die sinks, the centers of the two forming cavities on the upper part of the die will be closer to the center of the aluminum bar, and the flow rate of aluminum entering the two forming cavities on the upper part will increase. The center of the forming cavity on the lower part of the die will be far away from the center of the aluminum bar, and the flow rate of aluminum entering the lower forming cavity will decrease. However, because there are two forming cavities on the upper part, the opening area of the upper part is increased, i.e., the outflow area of the aluminum on the upper part is increased, thereby reducing the outflow pressure of the aluminum on the upper part, and further reducing the flow rate of the aluminum in the two forming cavities on the upper part. Finally, the flow rates of the aluminum in the three forming cavities on the upper and lower parts are balanced, so that the flow rates of the aluminum in the three forming cavities on the upper and lower parts will not differ too much.

[0004] The above technical solution discloses an extrusion die for aluminum profiles, but this die still has limitations when used:

[0005] Because some products may have openings 1 (for example Figure 1The product is hollow inside and has an opening 1 on the surface, and the product is usually formed by cooperation of the upper die and the lower die during extrusion forming, but some profiles have a large structure, especially a large hollow area, and the lower die has a protrusion (the protrusion is usually referred to as a lower die cantilever) corresponding to the hollow area, and the aluminum directly contacts the cantilever during extrusion, so that the extrusion force is directly transmitted to the lower die cantilever, and the cantilever is usually designed to have a certain length and has no reinforcing structure around the body, and the bottom to the middle area of the cantilever is always stressed due to frequent contact with the aluminum profile, and once the aluminum profile shakes during extrusion, the probability of the lower die cantilever collapsing or deforming is increased.

[0006] Therefore, how to solve the problems existing in the prior art has become a research topic of the utility model. Utility model content

[0007] The utility model provides a profile extrusion die, aims at solving the technical problems in the background art.

[0008] To achieve the above purpose, the utility model adopts the technical scheme of: a profile extrusion die, the product has a hollow area, and the product surface is provided with an opening communicating with the hollow area; characterized by: including a positioning connection of an upper die and a lower die, the upper die and the lower die form a forming cavity together; the forming cavity is used for guiding the material to move in the extrusion direction of the upper die to the lower die and extruding and forming into a product;

[0009] The forming cavity is sequentially divided into a feeding cavity, a transition cavity and a discharging cavity along the extrusion direction of the profile, and each cavity has a set length along the extrusion direction;

[0010] From the cross-sectional angle of the transition cavity, the shape of the discharging cavity is matched with the shape of the product, and the discharging cavity is provided with a cantilever corresponding to the hollow area;

[0011] The transition cavity has a support, and the support is arranged opposite to the cantilever.

[0012] In the above content, the support can shield the cantilever, so that the aluminum profile is not directly pushed against the cantilever during extrusion, so that the cantilever is not collapsed or deformed.

[0013] In the above content, the feeding cavity, the transition cavity and the discharging cavity all have a set length along the extrusion direction, so that each cavity can accommodate the profile, especially the transition cavity has a set length, which can prevent the profile from quickly filling the feeding cavity and affecting the feeding flow rate.

[0014] The transition cavity is arranged between the upper die and the lower die.

[0015] Further, the support has a top view projection smaller than that of the cantilever.

[0016] The top view projection of the support has three cases with that of the cantilever.

[0017] 1. The top view projection of the support coincides with that of the cantilever, in which case the extrusion force on the cantilever is the smallest. However, in this case, the material needs to quickly form a size matching the discharge cavity after entering the transition cavity, which increases the difficulty of the material flow in the transition cavity. Therefore, the third case is generally selected.

[0018] 2. The top view projection of the support is larger than that of the cantilever, in which case the extrusion force on the cantilever is also the smallest. However, when the material is discharged from the discharge cavity, it needs to bypass the bottom of the support and then enter the discharge cavity, which is more troublesome. Moreover, the difficulty of the material flow in the transition cavity is the largest.

[0019] 3. The top view projection of the support is smaller than that of the cantilever, in which case the cantilever will also be subjected to a certain extrusion force. However, compared with the case where the extrusion force is entirely applied to the cantilever, the impact on the cantilever is reduced in this case. Moreover, compared with the first case, the difficulty of the material flow in the transition cavity is smaller.

[0020] Further, the cantilever comprises a main body arranged in the discharge cavity, the main body is arranged in matching with the hollow area, a connecting part is arranged in the discharge cavity and fixedly connected with the main body, and the connecting part is arranged in matching with the opening. By means of the above design, after the profile is limited by the cantilever, it can pass through the discharge cavity to form a product.

[0021] Further, a set distance is arranged between the end of the support close to the cantilever and the main body. By means of the above design, the pressure applied by the support to the main body can be prevented.

[0022] Further, the feeding cavity is arranged in the upper die, the discharge cavity is arranged in the lower die, and the transition cavity is arranged between the upper die and the lower die.

[0023] A separation part is arranged on the surface of the upper die, and a plurality of feeding holes are arranged along the circumferential side of the separation part.

[0024] The feeding cavity is composed of a plurality of feeding holes, and the projection of the cross section of the feeding cavity is entirely located on the front end surface of the profile.

[0025] The support arranged in the transition cavity is positioned and connected with the separation part. By means of the above design, when the profile enters the feeding hole, it will not be blocked by the support.

[0026] Further technical solutions, the transition cavity is one or more containing grooves, and the opening of each containing groove corresponds to at least two feeding holes.

[0027] Further technical solutions, the discharge cavity is one or more discharge holes arranged on the lower mold, and each discharge hole is arranged at the bottom of each containing groove one by one.

[0028] As for the "first", "second" and the like used herein, it is not particularly intended to indicate the order or sequence, nor to limit the present application, but only to distinguish the components or operations described by the same technical terms.

[0029] As for the "connection" or "positioning" used herein, it can mean that two or more components or devices are in direct physical contact with each other or indirectly in physical contact with each other, or can mean that two or more components or devices are in operation or action.

[0030] As for the "contain", "include", "have" and the like used herein, they are all open terms, that is, they mean containing but not limited to.

[0031] As for the words (terms) used herein, except for special notes, they generally have the usual meaning of each word used in this field, in the content of the present application and in the special content. Some words used to describe the present application will be discussed below or elsewhere in the specification to provide additional guidance for those skilled in the art on the description of the present application.

[0032] As for the "front", "back", "up", "down", "left", "right" and the like used herein, they are all directional words, which are only used to illustrate the positional relationship between structures in the present application, and are not used to limit the protection scheme and the specific direction in actual implementation.

[0033] The working principle and advantages of the utility model are as follows:

[0034] In the utility model, the support and the cantilever can be matched, so that the cantilever can be shielded by the support, the pressure of the aluminum profile is prevented from being directly transmitted to the cantilever of the lower mold, and the deformation probability of the cantilever is reduced.

[0035] Secondly, this protection design for the cantilever is universal and applicable to all molds with large cantilevers of the lower mold. DETAILED DESCRIPTION

[0036] ATTACHMENT Figure 1 It is a product opening structure schematic diagram in the prior art;

[0037] ATTACHMENT Figure 2 It is a product opening structure schematic diagram in the utility model embodiment one.

[0038] Figure 1 is a structure schematic diagram of the lower die and the upper die of the first embodiment of the utility model in the process of assembling; Figure 3

[0039] Figure 2 is a longitudinal section structure schematic diagram of the lower die and the upper die of the first embodiment of the utility model in the process of assembling; Figure 4

[0040] Figure 3 is a structure schematic diagram of the first supporting piece of the first embodiment of the utility model; Figure 5

[0041] Figure 4 is a structure schematic diagram of the first partition of the first embodiment of the utility model; Figure 6

[0042] Figure 5 is a structure schematic diagram of the first feeding hole of the first embodiment of the utility model; Figure 7

[0043] Figure 6 is a structure schematic diagram of the discharging hole of the first embodiment of the utility model; Figure 8

[0044] Figure 7 is a structure schematic diagram of the discharging cavity of the first embodiment of the utility model; Figure 9

[0045] Figure 8 is a structure schematic diagram of the first main body of the first embodiment of the utility model; Figure 10

[0046] Figure 9 is a structure schematic diagram of the product opening of the second embodiment of the utility model; Figure 11

[0047] Figure 10 is a structure schematic diagram of the lower die and the upper die of the second embodiment of the utility model in the process of assembling; Figure 12

[0048] Figure 11 is a structure schematic diagram of the second main body of the second embodiment of the utility model in the process of assembling the lower die and the upper die; Figure 13

[0049] Figure 12 is a longitudinal section structure schematic diagram of the lower die and the upper die of the second embodiment of the utility model in the process of assembling; Figure 14

[0050] Figure 13 is a structure schematic diagram of the second partition of the second embodiment of the utility model; Figure 15

[0051] Figure 14 is a structure schematic diagram of the second supporting piece of the second embodiment of the utility model; Figure 16

[0052] Figure 15 is a structure schematic diagram of the cantilever of the second embodiment of the utility model; Figure 17

[0053] Figure 16 is a structure schematic diagram of the second feeding hole of the second embodiment of the utility model;​​​​​​​​​​​​​​​Figure 18 It is the lower mould structure schematic view in the second embodiment of the utility model;

[0054] Attached Figure 19 It is the second discharge hole structure schematic view in the second embodiment of the utility model;

[0055] Attached Figure 20 It is the second main body structure schematic view in the second embodiment of the utility model;

[0056] Attached Figure 21 It is the second accommodating groove structure schematic view in the second embodiment of the utility model;

[0057] Attached Figure 22 It is the product opening structure schematic view in the third embodiment of the utility model;

[0058] Attached Figure 23 It is the structure schematic view when the lower mould and the upper mould of the third embodiment of the utility model are assembled;

[0059] Attached Figure 24 It is the longitudinal section structure schematic view when the lower mould and the upper mould of the third embodiment of the utility model are assembled;

[0060] Attached Figure 25 It is the third support structure schematic view in the third embodiment of the utility model;

[0061] Attached Figure 26 It is the third main body structure schematic view in the third embodiment of the utility model;

[0062] Attached Figure 27 It is the third discharge hole structure schematic view in the third embodiment of the utility model;

[0063] Attached Figure 28 It is the third connecting portion structure schematic view in the third embodiment of the utility model;

[0064] Attached Figure 29 It is the third accommodating groove structure schematic view in the third embodiment of the utility model;

[0065] Attached Figure 30 It is the discharge hole structure schematic view in the third embodiment of the utility model.

[0066] In the above drawing: 1, opening; 2, lower mould; 3, upper mould; 4, hollow area; 5, feeding cavity; 6, transition cavity; 7, discharge cavity; 8, cantilever; 9, support; 10, main body; 11, connecting portion; 12, partition; 13, feeding hole; 14, discharge hole; 15, accommodating groove;

[0067] 91, first support; 92, second support; 93, third support;

[0068] 101, first body; 102, second body; 103, third body;

[0069] 111, first connecting part; 112, second connecting part; 113, third connecting part;

[0070] 121, first partition; 122, second partition; 123, third partition;

[0071] 131, first feeding hole; 132, second feeding hole; 133, third feeding hole;

[0072] 141, first discharging hole; 142, second discharging hole; 143, third discharging hole;

[0073] 151, first accommodating groove; 152, second accommodating groove; 153, third accommodating groove. DETAILED DESCRIPTION

[0074] The utility model will be further described below in combination with the drawings and examples:

[0075] Examples: the following will be described in detail by the drawings and the present case is clearly explained, any person skilled in the art can be changed and modified by the technology taught by the present case after understanding the examples of the present case, which does not deviate from the spirit and scope of the present case.

[0076] The language in this paper is only for describing specific embodiments, and is not intended to limit the present case. The singular form such as "one", "this", "this", "this" and "this", as used herein, also includes the plural form.

[0077] Referring to the drawings Figures 2-29 As shown in the drawings, a profile extrusion die, the product aimed at the extrusion die has a hollow area 4, and the product surface is provided with an opening 1 communicating with the hollow area 4; characterized in that: including positioning and connecting upper die 3 and lower die 2, upper die 3 and lower die 2 form a forming cavity together; the forming cavity is used to guide the material to move along the extrusion direction of the profile and extrude into the product;

[0078] The forming cavity is sequentially divided into feeding cavity 5, transition cavity 6 and discharging cavity 7 along the extrusion direction of the profile, and each cavity has a set length along the extrusion direction;

[0079] From the cross-sectional angle of the transition cavity 6, the shape of the discharging cavity 7 matches the shape of the product, and the discharging cavity 7 is provided with a cantilever 8 corresponding to the hollow area 4;

[0080] The transition cavity 6 has a support 9, and the support 9 is arranged opposite to the cantilever 8.

[0081] The utility model discloses a support piece 9 and cantilever 8's cooperation can make cantilever 8 can be shielded with support piece 9, prevent the pressure of aluminum profile and directly transmit to the cantilever 8 of lower mould 2, thereby reduced the deformation probability of cantilever 8.

[0082] Secondly, the protection design for the cantilever 8 is universal and applicable to all molds with a large cantilever 8 of the lower mold 2.

[0083] In some embodiments, the plan view projection of the support piece 9 is smaller than the plan view projection of the cantilever 8. The plan view projection of the support piece 9 and the plan view projection of the cantilever 8 have three cases.

[0084] 1. The plan view projection of the support piece 9 coincides with the plan view projection of the cantilever 8, in which case the extrusion force on the cantilever 8 is the smallest. However, in this case, the material needs to quickly form a size matching the discharge cavity 7 after entering the transition cavity 6, which increases the difficulty of material flow in the transition cavity 6.

[0085] 2. The plan view projection of the support piece 9 is larger than the plan view projection of the cantilever 8, in which case the extrusion force on the cantilever 8 is also the smallest. However, when the material is discharged from the discharge cavity 7, it needs to bypass the bottom of the support piece 9 and then enter the discharge cavity 7, which is more troublesome, and the difficulty of material flow in the transition cavity 6 is the greatest.

[0086] 3. The plan view projection of the support piece 9 is smaller than the plan view projection of the cantilever 8, in which case the cantilever 8 will also be subjected to a certain extrusion force, but compared to the case where the extrusion force is all applied to the cantilever 8, the impact on the cantilever 8 can be reduced, and compared to the first case, the difficulty of material flow in the transition cavity 6 is smaller.

[0087] Therefore, the third option is mostly chosen.

[0088] In some embodiments, the cantilever 8 includes a main body 10 disposed in the discharge cavity 7, the main body 10 is matched with the hollow area 4, and the discharge cavity 7 is provided with a connecting part 11 fixedly connected with the main body 10, and the connecting part 11 is matched with the opening 1.

[0089] With the above design, after the profile is limited by the cantilever 8, it can pass through the discharge cavity 7 to form a product with a hollow area and an opening 1. The main body 10 is used to form the control area, and the opening 1 is formed by the connecting part 11.

[0090] In some embodiments, there is a set distance between the end of the support piece 9 close to the cantilever 8 and the main body 10. With the above design, the support piece 9 can be prevented from exerting pressure on the main body 10.

[0091] In some embodiments, the feeding cavity 5 is provided in the upper mold 3, the discharge cavity 7 is provided in the lower mold 2, and the transition cavity 6 is provided between the upper mold 3 and the lower mold 2.

[0092] The upper mold 3 is provided with a partition 12, and a plurality of feeding holes 13 are arranged along the periphery of the partition 12;

[0093] The feeding cavity 5 is formed by the plurality of feeding holes 13, and the projection of the cross section of the feeding cavity 5 is located on the front end surface of the profile;

[0094] The support 9 arranged in the transition cavity 6 is positioned and connected with the partition 12. By the above design, when the profile enters the feeding hole 13, the profile is not blocked by the support 9.

[0095] In some embodiments, the transition cavity 6 is one or more containing grooves 15, and the opening of each containing groove 15 corresponds to at least two feeding holes 13.

[0096] In some embodiments, the discharging cavity 7 is one or more discharging holes 14 arranged on the lower mold 2, and each discharging hole 14 is arranged one by one at the bottom of each containing groove 15.

[0097] In order to show the generality of the protection design, the following is described in combination with the drawings: Figure 4 Figure 14 and Figure 24 The arrows in the drawings all represent the extrusion direction of the profile, and the extrusion direction from the upper mold 3 to the lower mold forms a product.

[0098] As shown in FIG. 1, Figures 2-10 Embodiment one: double-out profile, large cantilever tongue ratio (tongue ratio equals the cross section of the cantilever divided by the square of the opening), and the profile is prone to breakage or extrusion deviation during extrusion.

[0099] Therefore, specifically, the upper mold 3 is provided with a first partition 121, and four first feeding holes 131 are arranged along the periphery of the first partition 121; wherein the first partition 121 is in a cross shape (as shown in FIG. 2), Figure 3 the four first feeding holes 131 form a feeding cavity 5, and the projection of the cross section of the feeding cavity 5 is located on the front end surface of the profile;

[0100] Secondly, referring to FIG. 3, Figure 4 two transition cavities 6 (that is, two first containing grooves 151) are arranged, and a first support 91 is arranged in each first containing groove 151, one end of the first support 91 is positioned and connected on the horizontal section of the cross-shaped first partition 121, and the other end has a set distance, for example, 9 mm, from the cantilever 8 of the lower mold 2.

[0101] Specifically, two first discharging holes 141 are arranged on the lower mold 2, and the two first discharging holes 141 are arranged one by one with the two first containing grooves 151 arranged between the upper mold 3 and the lower mold 2;

[0102] ​Each first discharge hole 141 is provided with a first body 101, which is matched with the hollow area 4 shown in the first embodiment in Figure 10 the matching of the opening 1 shown in the first embodiment in Figure 10 .

[0103] In this way, the first support 91 can shield the first body 101, thereby preventing the first body 101 from being crushed.

[0104] In particular, the profile is fed in the extrusion direction from the upper die 3 to the lower die 2. When it contacts the feeding cavity 5, it is divided into four parts by the four first feeding holes 131. With the continuous feeding of the profile, it is converged into two parts when passing through the two first accommodating grooves 151, and then discharged from the two first discharge holes 141, thereby producing the product. During the entire operation process, by means of the first support 91 of the upper die 3, the metal can be prevented from directly rushing onto the first body 101 of the lower die 2 during the extrusion process, thereby ensuring the strength of the lower die 2 and preventing the first body 101 from being crushed and broken.

[0105] As shown in Figures 11-21 , the second embodiment: automobile material (the structure of the product can refer to Figure 11 ), the right side wall opening 1 is not in the center position, and the left and right are extremely asymmetrical, which is extremely easy to break or extrude during extrusion.

[0106] Therefore, in particular, the upper die 3 is provided with a second partition 122, and nine second feeding holes 132 are arranged along the circumferential side of the second partition 122; the nine second feeding holes 132 form a feeding cavity 5, and the projection of the cross section of the feeding cavity 5 is entirely located on the front end surface of the profile.

[0107] Secondly, a transition cavity 6 (i.e. a second accommodating groove 152) is arranged between the upper die 3 and the lower die 2, and a second support 92 is arranged in the second accommodating groove 152. One end of the second support 92 is positioned and connected to the second partition 122, and the other end has a set distance, for example, 17 mm, from the cantilever 8 of the lower die 2.

[0108] In particular, the lower die 2 is provided with a second discharge hole 142, which is correspondingly arranged in the second accommodating groove 152 arranged between the upper die 3 and the lower die 2.

[0109] The second discharge hole 142 is provided with a second body 102, which is matched with the hollow area 4 shown in the second embodiment in Figure 20 , and the second connecting part 112 is matched with the opening 1 shown in the second embodiment in Figure 20 .

[0110] In this way, the second support 92 can shield the second body 102, thereby preventing the second body 102 from being crushed.

[0111] In operation, the profile is fed in the extrusion direction from the upper die 3 to the lower die 2. When the profile contacts the feeding cavity 5, it is divided into multiple parts by the plurality of second feeding holes 132. With the continuous feeding of the profile, the profile is gathered into one part when passing through the second accommodating groove 152, and then is discharged from the second discharging hole 142, thereby producing the product. During the entire operation process, the second support 92 on the upper die 3 can prevent the metal from directly impacting the second body 102 on the lower die 2 during the extrusion process, thereby ensuring the strength of the lower die 2 and preventing the second body 102 from being crushed.

[0112] For Figures 22-30 As shown in FIG. 3, embodiment 3: a very typical cantilever profile die, (the structure of the product can refer to Figure 22 ), the cantilever 8 on the lower die 2 has a large area, but the opening 1 of the product is very small, and cannot be directly made into a flat die.

[0113] Therefore, specifically, the third partition 123 is arranged on the surface of the upper die 3, and four third feeding holes 133 are arranged along the circumferential side of the third partition 123; wherein the third feeding hole 133 is in the shape of a cross (as shown in Figure 23 ), the four third feeding holes 133 form a feeding cavity 5, and the projection of the cross section of the feeding cavity 5 is entirely located on the front end surface of the profile;

[0114] Secondly, a transition cavity 6 (that is, a third accommodating groove 153) is arranged, and a third support 93 is arranged in the third accommodating groove 153. One end of the third support 93 is positioned and connected to the center area of the third partition 123 in the shape of a cross, and the other end is spaced apart from the cantilever 8 of the lower die 2 by a set distance, for example, 14 mm.

[0115] Specifically, a third discharging hole 143 is arranged on the lower die 2, and the third discharging hole 143 is arranged corresponding to the third accommodating groove 153 arranged between the upper die 3 and the lower die 2.

[0116] The third discharging hole 143 is provided with a third body 103, and the third body 103 is arranged in matching with the hollow area 4 shown in Figure 29 of embodiment three, and the third connecting part 113 is arranged in matching with the opening 1 shown in Figure 22 of embodiment three.

[0117] In this way, the third support 93 can shield the third body 103, thereby preventing the third body 103 from being crushed.

[0118] In the specific work, the profile is fed according to the extrusion direction from the upper die 3 to the lower die 2, when contacting the feeding cavity 5, it is divided into four parts by the four third feeding holes 133, with the continuous feeding of the profile, it is converged again when passing through the third containing groove 153, and then is discharged from the third discharging hole 143, thus the product is generated, in the whole operation process, by the way that the upper die 3 is the third supporting piece 93, the metal can be prevented from directly rushing to the third main body 103 on the lower die 2 in the extrusion process, the strength of the lower die 2 is ensured, and the third main body 103 is prevented from being pressed and broken.

[0119] That is, the third supporting piece 93 is shielded to prevent the aluminum from directly pressing on the third main body 103 in the extrusion process, so that the third main body 103 is not pressed and collapsed.

[0120] The above examples are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, and it cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A profile extrusion die, characterized by: The hollow area (4) is arranged on the product to be extruded, and the product surface is provided with an opening (1) communicating with the hollow area (4); characterized in that: comprising a positioning connection of an upper die (3) and a lower die (2), the upper die (3) and the lower die (2) form a forming cavity together; the forming cavity is used for guiding the material to move in the extrusion direction of the profile from the upper die (3) to the lower die (2) and extruding into a product; The forming cavity is sequentially divided into a feeding cavity (5), a transition cavity (6) and a discharging cavity (7) along the extrusion direction of the profile, and each cavity has a set length along the extrusion direction; From the perspective of the cross section of the transition cavity (6), the shape of the discharging cavity (7) matches the shape of the product, and the discharging cavity (7) is provided with a cantilever (8) corresponding to the hollow area (4); The transition cavity (6) has a support (9) arranged opposite to the cantilever (8).

2. A profile extrusion die according to claim 1, characterised in that: The planar projection of the support (9) is smaller than the planar projection of the cantilever (8).

3. A profile extrusion die according to claim 1 or 2, characterised in that: The cantilever (8) comprises a main body (10) arranged in the discharging cavity (7), the main body (10) is arranged to match the hollow area (4), and the discharging cavity (7) is provided with a connecting part (11) fixedly connected with the main body (10), and the connecting part (11) is arranged to match the opening (1).

4. A profile extrusion die according to claim 3, characterised in that: There is a set distance between one end of the support (9) close to the cantilever (8) and the main body (10).

5. The profile extrusion die of claim 1, characterized in that: The feeding cavity (5) is arranged in the upper die (3), the discharging cavity (7) is arranged in the lower die (2), and the transition cavity (6) is arranged between the upper die (3) and the lower die (2); The upper die (3) is provided with a separation part (12), and a plurality of feeding holes (13) are arranged along the circumferential side of the separation part (12); The feeding cavity (5) is composed of a plurality of feeding holes (13), and the projection of the cross section of the feeding cavity (5) is located on the front end surface of the profile; The support (9) arranged in the transition cavity (6) is positioned and connected with the separation part (12).

6. A profile extrusion die according to claim 5, characterised in that: The transition cavity (6) is one or more containing grooves (15), and the opening of each containing groove (15) corresponds to at least two feeding holes (13).

7. A profile extrusion die according to claim 6, characterised in that: The discharging cavity (7) is one or more discharging holes (14) arranged on the lower die (2), and each discharging hole (14) is arranged one by one at the bottom of each containing groove (15).

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